Title of Invention

PEDALED MOTORCYCLE

Abstract [problem to be sloved] In a pedaled motorcycle in which a crankshaft having at least a pair of crank weights is supported on an engine case of an engine and a pedal shaft is rotataly supported on the engine case,contrive a reduction in vibration of a vehicle body frame due to the vibration of the engine,to secure the feeling of rigidity at the time of treading on pedals,and to constitute the engine in a compact from. An engine main body 33 including the engine case 35 is rigidly attached to the vehicle body frame,and a balancer 54 having a balance weight 54a disposed between the crank weight 45a so as to be partly overlapped with the crank weight 45a as viewed in the direction parallel to the axis of the crankshaft 45 is contained in the engine case 35 so as to be crankshaft 45 in conjunction with rotation of the crankshaft 45.
Full Text FORM 2
THE PATENTS ACT 1970
[39 OF 1970]
COMPLETE SPECIFICATION
[See Section 10]
"PEDALED MOTORCYCLE"
HONDA GIKEN KOGYO KABUSHIKI KAISHA, a corporation of Japan, having a place of business at 1-1, Minamiaoyama 2-chome, Minato-ku, Tokyo, Japan,
The following specification particularly describes the nature of the
invention and the manner in which it is to be performed:-

The present invention relates to a pedaled motorcycle.
[Technical Field of the Invention]
The present invention relates to a pedaled motorcycle, and particularly to a pedaled motorcycle which comprises a pedal shaft capable of transmitting a ...

tread force inputted from pedals provided at both ends thereof to a rear wheel, and an engine having a crankshaft rotated in an axis parallel to the pedal shaft and capable of transmitting rotational power to the rear wheel, and in which the crankshaft having at least a pair of crank weights is supported on an engine case of the engine, and the pedal shaft is rotatably supported on the engine case. [0002]
[Prior Art]
Hitherto, such a pedaled motorcycle as above has been known, for example, as disclosed in Japanese Patent Laid-open No. Hei 8-108875, in which a crankshaft and a pedal shaft are supported in common on an engine case possessed by the engine, thereby contriving reductions in the size and weight of the motorcycle. [0003]
[Problems to Be Solved by the Invention]
In the conventional pedaled motorcycle as above-mentioned, generally, the engine main body is mounted on the vehicle body frame through a rubber mount to ensure that the vibration of the engine is hardly transmitted to the vehicle body frame, and the intermediate presence of the elastic member between the engine case supporting the

pedal shaft and the vehicle body frame makes it difficult to secure the feeling of rigidity when the rider treads on the pedals. [0004]
The present invention has been made in consideration of the above situations, and it is an object of the invention to provide a pedaled motorcycle such that a reduction in vibration of the vehicle body frame due to the vibration of the engine can be contrived, and the engine can be constituted in a compact form while securing the feeling of rigidity at the time of treading on the pedals. [0005]
[Means for Solving the Problems]
In order to attain the above object, the invention as set forth in claim 1 is characterized in that, in a pedaled motorcycle which comprises a pedal shaft capable of transmitting a tread force inputted from pedals provided at both ends thereof to a rear wheel, and an engine having a crankshaft rotated around an axis parallel to the pedal shaft and capable of transmitting rotational power to the rear wheel, and in which the crankshaft having at least a pair of crank weights is supported on an engine case of the engine, and the pedal

shaft is rotatably supported on the engine case, an engine main body including the engine case is rigidly attached to a vehicle body frame, and a balancer having a balance weight disposed between the crank weights so as to be partly overlapped with the crank weights as viewed in a direction parallel to the axis of the crankshaft is contained in the engine case so as to be capable of rotating around an axis parallel to the crankshaft in conjunction with the rotation of the crankshaft. [0006]
According to such a constitution, the vibration of the engine is suppressed by the balancer, so that the vibration of the vehicle body frame due to the vibration of the engine can be reduced even though the engine main body is rigidly attached to the vehicle body frame. In addition, since the engine main body is rigidly attached to the vehicle body frame, it is possible to secure the feeling of rigidity at the time of treading on the pedals at both ends of the pedal shaft supported on the engine case possessed by the engine main body, and since there is no need for a vibration-isolating structure, the structure for supporting the engine main body onto the vehicle body frame can be made compact. Besides, since the balance weight of the balancer is disposed between a

pair of crank weights while being partly overlapped with the crank weights as viewed in a direction parallel to the axis of the crankshaft, the width of the engine case in the direction along the axis of the crankshaft can be set small in spite of the presence of the balancer, and the engine can be prevented from being enlarged in size. [0007]
In addition to the constitution of the invention set forth in claim 1, the invention as set forth in claim 2 is characterized in that a pair of the balancers having a rotational axis on the extension of one diameter line of the crankshaft are disposed on both sides of the crankshaft as viewed in the direction of the axis of a cylinder bore possessed by the engine main body. According to this constitution, a pair of the balancers capable of suppressing the rotational moment around the crankshaft can be disposed in a compact form between the pair of crank weights. [0008]
In addition to the constitution of the invention as set forth in claim 1 or 2, the invention as set forth in claim 3 is characterized in that the pedal shaft is supported on the engine case through bearings, and the crankshaft and the balancer are supported on a holder

fitted to the engine case respectively through bearings. According to this constitution, the crankshaft and the balancer are supported by the holder separate from the engine case, whereby concentration of balancer mass can be contrived, and the rigidity of the holder can be easily enhanced, so that the vibration-isolating effect of the balancer is enhanced, and the transmission of vibration to the engine case can be more restrained. As a result, the transmission of vibration to the vehicle body frame and the pedal shaft can be reduced more, and a reduction in the weight of the engine case can be contrived by securing rigidity by the holder. [0009]
In addition to the constitution of the invention as set forth in claim 2, the invention as set forth in claim 4 is characterized in that the crankshaft and the pedal shaft are disposed side by side at such positions that the axis of the cylinder bore skewly intersects a straight line connecting the axes of the shafts. According to this constitution, even though the pair of balancers are disposed on both sides of the crankshaft as viewed in the direction of the axis of the cylinder bore, the crankshaft and the pedal shaft can be disposed as close as possible to each other, and a reduction in the
size of the engine case can be contrived.


[BRIEF DESCRIPTION OF THE DRAWINGS] [Fig. 1]
Fig. 1 is a vertical sectional side view of a pedaled motorcycle according to a first embodiment; [Fig. 2]
Fig. 2 is a sectional view of an engine taken along line 2-2 of Fig. 1; [Fig. 3]

Fig. 3 is a sectional view taken along line 3-3 of Fig. 2; [Fig. 4]
Fig. 4 is a sectional view taken along line 4-4 of Fig. 3; [Fig. 5]
Fig. 5 is an enlarged sectional view taken along line 5-5 of Fig. 1; [Fig. 6]
Fig. 6 is an enlarged vertical sectional view of a portion of a vehicle body frame; [Fig. 7]
Fig. 7 is a sectional view taken along line 7-7 of Fig. 6; [Fig. 8]
Fig. 8 is a sectional view taken along line 8-8 of Fig. 6; [Fig. 9]
Fig. 9 is a sectional view taken along line 9-9 of Fig. 6; [Fig. 10]
Fig. 10 is a sectional view taken along line 10-10 of Fig. 6; [Fig. 11]

Fig. 11 is a side view of a pedaled motorcycle according to a second embodiment; [Fig. 12]
Fig. 12 is an enlarged vertical sectional side view of a major portion of Fig. il; [Fig. 13]
Fig. 13 is a sectional view taken alone line 13-13 of Fig. 12; [Fig. 14]
Fig. 14 is an enlarged view of a major portion of Fig. 13; and [Fig. 15]
Fig. 15 is a sectional view taken along line 15-15 of Fig. 14.

[0010]
[Mode for Carrying Out the Invention]
Now, modes for carrying out the present invention will be described based on embodiments of the invention shown by the attached drawings.
[0011]
Figs. 1 to 10 show a first embodiment of the present invention, wherein Fig. 1 is a vertical sectional view of a pedaled motorcycle; Fig. 2 is a sectional view of an engine taken along line 2-2 of Fig. 1; Fig. 3 is a vertical sectional view taken along line 3-3 of Fig. 2; Fig. 4 is a sectional view taken along line 4-4 of Fig. 3; Fig. 5 is an enlarged sectional view taken along line 5-5 of Fig. 1; Fig. 6 is an enlarged vertical sectional view of a portion of a vehicle body frame; Fig. 7 is a sectional view taken along line 7-7 of Fig. 6; Fig. 8 is a sectional view taken along line 8-8 of Fig. 6; Fig. 9 is a sectional view taken along line 9-9 of Fig. 6; and Fig. 10 is a sectional view taken along line 10-10 of Fig, 6.
[0012]
First, in Fig. 1, a vehicle body frame 21 of the pedaled motorcycle comprises a main frame 23 provided at

its front end with a head pipe 22 and inclined downwardly rearwards, a seat post 24 extended upwards from a rear portion of the main frame 23, and a left-right pair of rear frames 25 ... having top ends connected to upper portions of the seat post 24.
[0013]
A front fork 26 is steerably supported by the head pipe 22, a front wheel WF is shaft-supported at the lower end of the front fork 26, and a bar-like steering handle 27 is provided at the upper end of the front fork 26.
[0014]
A support pipe 29 provided at its upper end with a saddle-formed seat 28 for seating the driver is inserted into the seat post 24 from the upper side, and the support pipe 29 is fixed to the seat post 24 so that its vertical position can be adjusted.
[0015]
A rear wheel WR is shaft-supported between lower portions of the left-right pair of rear frames 25 ..., a tread force generated when the rider on the seat 28 treads on a left-right pair of crank pedals 30 ... can be transmitted to the rear wheel WR, and an output of an engine 31 mounted on the vehicle body frame 21 can also be transmitted to the rear wheel WR. A luggage box 32

disposed on the rear side of the seat post 24 is supported on an upper portion of the seat post 24, and the pair of rear frames 25 ... are so disposed as to cover the luggage box 32 from the rear side. A battery, a controller for controlling the engine 31 and the like are contained in the luggage box 32. [0016]
Referring to Figs. 2 to 4 also, the engine 31 is a side valve type 4-cycle engine, and an engine main body 33 of the engine 31 comprises a cylinder block 34, an engine case 35 connected to a lower portion of the cylinder block 34, and a cylinder head 36 connected to an upper portion of the cylinder block 34. [0017]
The cylinder block 34 integrally has a cylinder portion 34a provided with a cylinder bore 37, and the engine main body 33 is rigidly attached to the vehicle body frame 21 so that the cylinder portion 34a disposed on the rear side of the seat post 24 is disposed along the seat post 24 in the state of being inclined upwardly rearwards between the seat post 24 and the rear wheel WR. [0018]
The engine case 35 comprises first and second case members 38, 39 connected to each other so as to form a

crank chamber 42 therebetween, a third case member 40 connected to the second case member 39 so that an operating chamber 43 disposed on the outside of the crank chamber 42 is formed between the third case member 40 and the first and second case members 38, 39, and a fourth case member 41 connected to the third case member 40, and the operating chamber 43 is opened toward the side of the rear wheel WR.
[0019]
A split surface of the first and second case members 38, 39 is set on a plane including the axis C of the cylinder bore 37, and the first and second case members 38, 39 are fastened to the cylinder block 34 with a portion of the cylinder portion 34a disposed therebetween.
[0020]
Most of a crankshaft 45 having an axis along the width direction of the motorcycle is contained in the crank chamber 42, and a piston 46 slidably fitted in the cylinder bore 37 is connected to the crankshaft 45 through a connecting rod 47. The crankshaft 45 has a pair of crank weights 45a, 45a, and the crankshaft 45 is rotatably supported by a holder 50 which is composed of a pair of holding plates 48, 49 with the crank weights 45a,

45a disposed therebetween, is contained in the crank chamber 42, and is fastened to the first and second case members 38, 39 of the engine case 35.
[0021]
A plurality of cylindrical spacers 51 ... are intermediately disposed between the holding plates 48 and 49, and the holding plates 48, 49 are connected by rivets 52 ... inserted through the spacers 51 ..., whereby the holder 50 is composed. The holder 50 is fastened to the first and second case members 38, 39 of the engine case 35, and is fastened to the cylinder portion 34a of the cylinder block 34.
[0022]
Outer rings of a pair of ball bearings 53, 53 are coaxially pressed into the holding plates 48, 49 of the holder 50, and the crankshaft 45 is rotatably supported on the holder 50 though the ball bearings 53, 53.
[0023]
A pair of balancers 54, 54 contained in the crank chamber 42 while having a rotational axis on one diameter line of the crankshaft 45 are disposed on both sides of the crankshaft 45 as viewed from a direction along the axis C of the cylinder bore 37, and balance weights 54a, 54a possessed respectively by the balancers 54, 54 are

disposed between the crank weights 45a, 45a of the crankshaft 45 so as to be partly overlapped with the crank weights 45a, 45a as viewed from a direction parallel to the axis of the crankshaft 45. [0024]
The balancers 54, 54 are rotatably supported by the holder 50 through two paired sets of ball bearings 55, 55; 55, 55, and outer rings of the ball bearings 55 ... are pressed into the holding plates 48, 49 of the holder 50. [0025]
A driving gear 56 is fixed to the crankshaft 45 between the holding plate 48 of the holder 50 and one of the crank weights 45a of the crankshaft 45, and driven gears 57, 57 meshed with the driving gear 56 are respectively fixed to the balancers 54, 54. Therefore, the balancers 54, 54 are rotated in opposite directions around axes parallel to the crankshaft 45, in conjunction with the rotation of the crankshaft 45. [0026]
A pedal shaft 58 having an axis on an extension line of the seat post 24 possessed by the vehicle body frame 21 to the lower side is disposed on the front side of the crankshaft 45 along the front-rear direction of

the vehicle body frame 21, while having an axis parallel to the crankshaft 45, and the pedal shaft 58 is rotatably supported on the first and fourth case members 38, 41 of the engine case 35 through ball bearings 59, 60. In addition, crank pedals 30 ... are provided respectively at both ends of the pedal shaft 58 on the outer side of the engine case 35. [0027]
A generator 63 comprising a rotor 61 relatively rotatably supported by the pedal shaft 58 so as to be rotatable around the same axis as the pedal shaft 58 and a stator 62 fixedly supported by the first case member 38 of the engine case 35 so as to be covered by the rotor 61 is contained in the operating chamber 43. [0028]
A driving pulley 64 is relatively unrotatably fitted to the crankshaft 45 projected into the operating chamber 43 by rotatably piercing through the second case member 39 of the engine case 35, and an endless belt 66 is wrapped around a driven pulley 65 fixed to the rotor 61 of the generator 63 and the driving pulley 64. Therefore, the rotor 61 of the generator 63 is driven to rotate according to the rotation of the crankshaft 45. [0029]


Referring to Fig. 5 also, rotational power of the crankshaft 45 is transmitted to the rear wheel WR through a power transmission means 69 including a belt-type non-stage transmission 70 and a planetary gear type speed reduction gear 71, and the power transmission means 69 is disposed on the left side of a vertical plane including the axis C of the cylinder bore 37 possessed by the engine 31, as viewed in the forward direction of the motorcycle. [0030]
The belt-type non-stage transmission 70 comprises a driving pulley 73 provided on the crankshaft 45 in the operating chamber 43 while having a centrifugal weight 72 and having an effective radius varied by the action of the centrifugal weight 72, a driven pulley 74 whose effective radius is varied according to the variation of the effective radius of the driving pulley 73, and an endless belt 75 as an engine-side power transmission member wrapped around the driving pulley 73 and the driven pulley 74. [0031]
A transmission case 77 containing the driven pulley 74, a starting clutch 76 consisting of a centrifugal clutch, and the planetary gear type speed reduction gear

71 is disposed on the left side of the rear wheel WR as viewed in the forward direction of the motorcycle, the third case member 40 of the engine case 35 of the engine 31 is extended to the rear side from the engine 31 and connected to the transmission case 77, and the transmission case 77 is fixedly supported by one of the left-right pair of rear frames 25 .... [0032]
One end side of the axle 78 of the rear wheel WR is rotatably supported by the transmission case 77, the driven pulley 74 is relatively rotatably fitted to the axle 78, and the starting clutch 76 and the planetary gear type speed reduction gear 71 are intermediately disposed between the driven pulley 74 and the axle 78. [0033]
In such a belt-type non-stage transmission 70 as above, the effective radius of the driving pulley 73 is increased under the action of the centrifugal weight 72 attendant on an increase in the revolution number of the crankshaft 45, and the effective radius of the driven pulley 74 is decreased attendantly, whereby the speed change ratio is stagelessly varied from the LOW side to the TOP side, and the driving force of the engine 31 speed-changed by the belt-type non-stage transmission 70

is further speed-reduced by the planetary gear type speed reduction gear 71, before being transmitted to the axle 78. [0034]
A back plate 80 of a drum brake 79 is fixedly supported by the other of the left-right pair of rear frames 25 ..., on the right side of the rear wheel WR as viewed in the forward direction of the motorcycle, and the other side of the axle 78 is rotatably supported on the back plate 80. [0035]
A driven sprocket 81 is attached to the axle 78 on the outer side than the back plate 80. A driving sprocket 82 corresponding to the driven sprocket 81 is attached to the pedal shaft 58 on the right side of the engine case 35, and an endless chain 83 as a pedal-side power transmission member is wrapped around the driving sprocket 82 and the driven sprocket 81. Therefore, when the pedal shaft 58 is rotated by treading on the crank pedals 30 ..., rotational power according to the tread force is transmitted to the axle 78 of the rear wheel WR. [0036]
Paying special attention to Figs. 2 and 3, a combustion chamber 85 on which a portion of a top portion

of the piston 46 fronts is provided between the cylinder block 34 and the cylinder head 36 of the engine 31 being a side valve type 4-cycle engine, with its center located at a position staggered to the right side from the axis C of the cylinder bore 37 as viewed in the forward direction of the motorcycle. An ignition plug 86 whose inner end fronts on the combustion chamber 85 is fitted to the cylinder head 36. [0037]
At the cylinder portion 34a of the cylinder block 34, an intake port 87 capable of communication with the combustion chamber 85 is provided fronting on the side of the main frame 23, whereas an exhaust port 88 capable of communication with the combustion chamber 85 is provided fronting on the side of the rear wheel WR, and the intake port 87 and the exhaust port 88 are disposed on the right side of a vertical plane including the axis of the cylinder bore 37 as viewed in the forward direction of the motorcycle. [0038]
An intake valve 89 for switching between ■«munication and shut-off between the intake port 87 and ■Tibustion chamber 85 and an exhaust valve 30 for
between communication and shut-off between the

exhaust port 88 and the combustion chamber 85 are openably and closably supported on the cylinder block 34 so as to front on the combustion chamber 85 on a lateral side of the cylinder bore 37, and are urged in valve-closing directions by springs. [0039]
Namely, the power transmission means 69 for transmitting the rotational power of the crankshaft 45 to the rear wheel WR and the intake valve 89 and the exhaust valve 90 are disposed while being separately distributed to the left and right sides of the vertical plane including the axis C of the cylinder bore 37. [0040]
The intake valve 89 and the exhaust valve 90 are driven to open and close by a valve-operating mechanism 91. The valve-operating mechanism 91 comprises a timing driving gear 92 fixed to the crankshaft 45, a timing driven gear 94 rotatably supported by a support shaft 93 fixed to the holding plate 48 of the holder 50 and meshed with the timing driving gear 92, a cam 95 formed as one body with the timing driven gear 94, an intake-side rocker arm 96 supported on the cylinder block 34 so as to • following up to the cam 95 and connected to and
"1 in conjunction with the intake valve 89, and an

exhaust-side rocker arm 97 supported on the cylinder block 34 so as to rock following up to the cam 95 and connected to and operated in conjunction with the exhaust valve 90. [0041]
The timing driving gear 92 transmits the rotational power of the crankshaft 45 to the timing driven gear 94 and the cam 95 with a speed reduction by a factor of 1/2. Namely, the cam 95 is rotated at a speed of 1/2 of the rotation speed of the crankshaft 45. [0042]
The downstream end of an intake pipe 98 extended in the front-rear direction of the vehicle body frame 21 is connected to the cylinder portion 34a of the cylinder block 34 so as to be communicated with the intake port 87, and the upstream end of the intake pipe 98 is connected to the downstream end of a carburetor 99 contained in a rear portion in the main frame 23 of the vehicle body frame 21. [0043]
Referring to Figs. 6 to 10 also, the main frame 23 of the vehicle body frame 21 is formed to be hollow, and comprises an angular tubular first frame member 101 with a roughly tetragonal cross sectional shape, a second

frame member 102 having a roughly U-shaped cross sectional shape, having its rear end fastened to the front end of the first frame member 101 and integrally provided with the head pipe 22 at its front end, and a third frame member 103 provided integrally with the seat post 24 and fastened to the rear end of the first frame member 101. Namely, a front portion of the main frame 23 is formed to be open to the upper and lower sides, an intermediate portion of the main frame 23 is formed to be open to the front and rear sides, and a rear portion of the main frame 23 is formed to be open to the rear and lower sides. [0044]
A front portion of the main frame 23, namely, the second frame member 102 provided integrally with the head pipe 22 is covered by a cover 104 composed by coupling a pair of cover halves, and an outer surface of the cover 104 is connected to and flush with an outer surface of the first frame member 101. [0045]
The inner surface over the entire length of the angular tubular first frame member 101 is provided integrally with a plurality of, for example, four projected portions 105, 105 ..., the rear end of the

second frame member 102 is fastened to the front ends of the projected portions 105, 105 ... through bolts 106, 106 ..., and the front end of the third frame member 103 is fastened to the rear ends of the projected portions 105, 105 ... through bolts 107, 107 .... [0046]
A fuel tank 108 is contained in a front portion of the main frame 23, a fuel pouring-in pipe 108a possessed by the fuel tank 108 is projected upwards through an opening portion 109 provided at an upper portion of the cover 104, and a cap 110 is detachably fitted to the upper end of the fuel pouring-in pipe 108a. [0047]
An air cleaner 111 composed of a cleaner element
113 contained in a cleaner case 112 is contained in the
main frame 23 between the fuel tank 108 and the
carburetor 99.
[0048]
A projected portion 115 for fitting a vibration-isolating rubber 114 thereto is provided at a rear portion of the fuel tank 108, and a cylindrical boss portion 116 for fitting the vibration-isolating rubber
114 is projected at a front portion of the cleaner case
112. A rear portion of the cleaner case 112 is provided

with a plurality of, for example, two flange portions 112a, 112a projected outwards, and the flange portions 112a, 112a are fastened to front portions of the third frame member 103 by bolts 117, 117. [0049]
A fuel conduit 118 is connected to an intermediate portion in the vertical direction of a rear portion of the fuel tank 108, a fuel conduit 119 is connected to the lowest portion, the fuel conduits 118, 119 are extended to the side of the carburetor 99 by passing through a gap between the air cleaner 111 and the main frame 23, and the other ends of the fuel conduits 118, 119 are connected to a cock of the carburetor 99. The cock can be switched among a condition where fuel is conducted from the fuel conduit 118 to the carburetor 99, a condition where fuel is conducted from the fuel conduit 119 to the carburetor 99, and a condition where the fuel is not conducted from any of the fuel conduits 118, 119 to the carburetor 99. [0050]
The cleaner element 113 is fitted to an opening portion 120 provided in the cleaner case 112 so as to be directed to the side of the fuel tank 108, and a perforated plate 121 for supporting the cleaner element

113 from the inner side of the cleaner case 112 is fixed
to the cleaner case 112.
[0051]
Air led into the main frame 23 through a gap generated between the opening portion 109 of the cover 104 and the fuel pouring-in pipe 108a of the fuel tank 108 and the like is cleaned by being sucked into the cleaner case 112 through the cleaner element 113. The upstream end of a connection pipe 122 is connected to a rear portion of the cleaner case 112, and the downstream end of the connection pipe 122 is connected to the upstream end of the carburetor 99. Therefore, the air cleaned by the air cleaner 111 is led into the carburetor 99. [0052]
Referring again to Figs. 2, 3 and 5, the upstream end of an exhaust pipe 125 for conducting an exhaust gas from the engine 31 is connected to the cylinder block 34 so as to be communicated with the exhaust port 88. The exhaust pipe 125 is extended downwards along the rear wheel WR between the engine 31 and the rear wheel WR, and the downstream end of the exhaust pipe 125 is connected to a muffler 126 supported by the rear frame 25 of the vehicle body frame 21 and disposed on the right side of

the rear wheel WR. [0053]
In addition, the chain 83 for transmitting the rotational power of the pedal shaft 58 to the axle 78 of the rear wheel WR and the belt 75 for transmitting the rotational power of the crankshaft 45 to the axle 78 of the rear wheel WR are disposed while being separately distributed to the left and right sides of the exhaust pipe 125. [0054]
Next, the action or effect of the first embodiment will be described. The cylinder portion 34a of the engine 31 supported on the vehicle body frame 21 with the crankshaft 45 disposed on the rear side of the pedal shaft 58 is disposed with an upwardly rearward inclination between the seat post 24 of the vehicle body frame 21 and the rear wheel WR, and the exhaust pipe 125 for conducting the exhaust gas from the engine 31 is disposed to be extended downwards along the rear wheel WR between the engine 31 and the rear wheel WR and connected to the muffler 126, so that the performance of the engine 31 can be enhanced through easily securing the length of the exhaust pipe while disposing the exhaust pipe 125 at a position away from the vehicle body frame 21 and away

from the pedal shaft 58.
[0055]
In addition, the belt 75 for transmitting the rotational power of the crankshaft 45 to the axle 78 of the rear wheel WR and the chain 83 for transmitting the rotational power of the pedal shaft 58 to the axle 78 of the rear wheel WR are disposed while being separately-distributed to the left and right sides of the exhaust pipe 125, and the exhaust pipe 125 is surrounded by the engine 31, the rear wheel WR, the belt 75 and the chain 83 on the front, rear, left and right sides thereof, so that a protector or the like for exclusive use for covering the exhaust pipe 125 is unnecessitated, and the number of component parts can be reduced.
[0056]
Besides, the crankshaft 45 having a pair of crank weights 45a, 45a is supported on the engine case 35 possessed by the engine 31, and the pedal shaft 58 is rotatably supported on the engine case 35; the engine main body 33 including the engine case 35 is rigidly-attached to the vehicle body frame 21, and a pair of balancers 54, 54 are contained in the engine case 35 so as to be capable of rotation around an axis parallel to the crankshaft 45 in conjunction with the rotation of the

crankshaft 45.
[0057]
Therefore, vibration of the engine 31 is restrained by the balancers 54, 54, so that vibration of the vehicle body frame 21 due to engine vibration can be reduced even though the engine main body 33 is rigidly attached to the vehicle body frame 21. In addition, since the engine main body 33 is rigidly attached to the vehicle body frame 21, the feeling of rigidity at the time of treading on the crank pedals 30 ... at both ends of the pedal shaft 58 supported by the engine case 35 possessed by the engine main body 33 can be secured, and there is no need for a vibration-isolating structure, so that the structure for supporting the engine main body 33 onto the vehicle body frame 21 can be made compact.
[0058]
Besides, the balancers 54, 54 respectively have a balance weight 54a disposed between the crank weights 45a, 45a so as to be partly overlapped with the crank weights 45a, 45a as viewed in a direction parallel to the axis of the crankshaft 45, so that in spite of the presence of the balancers 54, 54, the width of the engine case 35 in the direction along the axis of the crankshaft 45 can be set small, and an increase in the size of the engine 31

can be prevented.
[0059]
In addition, the balancers 54, 54 are disposed on both sides of the crankshaft 45 as viewed in the direction along the axis C of the cylinder bore 37 possessed by the engine main body 33, so as to have a rotational axis on the extension of one diameter line of the crankshaft 45, and the pair of balancers 54, 54 capable of suppressing a rotational moment around the crankshaft 45 can be disposed in a compact form between the pair of crank weights 45a, 45a.
[0060]
While the pedal shaft 58 is supported on the engine case 35 through the ball bearings 59, 60, the crankshaft 45 and the balancers 54, 54 are supported on the holder 50 fitted to the engine case 35 respectively through the ball bearings 53, 53; 55, 55. Namely, the crankshaft 45 and the balancers 54, 54 are supported by the holder 50 separate from the engine case 35, whereby concentration of balancer mass is contrived, rigidity of the holder 50 is easily enhanced, the vibration-isolating effect of the balancers 54, 54 is enhanced, and transmission of vibration to the engine case 35 can be more restrained. As a result, transmission of vibration to the vehicle

body frame 21 and the pedal shaft 58 can be more reduced, and a reduction in the weight of the engine case 35 can be contrived through securing rigidity by the holder 50. [0061]
Further, the axis of the pedal shaft 58 is disposed on an imaginary extension to the lower side of the seat post 24 constituting a part of the vehicle body frame 21, the cylinder portion 34a of the engine 31 supported on the vehicle body frame 21 with the crankshaft 45 disposed on the rear side of the pedal shaft 58 is disposed along the seat post 24 on the rear side of the seat post 24, and the carburetor 99 contained in the main frame 23 is connected to an upper portion of the engine 31 through the intake pipe 98 extended in the front-rear direction of the vehicle body frame 21. [0062]
Therefore, the intake system and the exhaust system of the engine 31 can be so disposed as to obviate interference with the space required for the rotation of the crank pedals 30 ... at both ends of the pedal shaft 58, the engine 31 can be constituted collectively compact through constituting a part of the intake system by the inside of the main frame 23, and the motorcycle as a whole can be made compact.

[0063]
Besides, since the engine 31 is a side valve type 4-cycle engine, the intake port 87 and the exhaust port 88 are provided at the cylinder portion 34a of the engine 31, and the intake pipe 98 and the exhaust pipe 125 can be connected to the cylinder portion 34a, so that the overall height of the engine 31 can be set small although the engine 31 is a 4-cycle engine capable of cleaning the exhaust gas, whereby the height from the ground of a lower portion of the engine 31 and a space for disposing accessories on the upper side of the engine 31 can be earned. [0064]
Further, the engine 31 is supported on the vehicle body frame 21 in such a layout that the intake and exhaust valves 89, 90 and the power transmission means 69 for transmitting power from the crankshaft 45 to the rear wheel WR are separately distributed to the left and right sides of a vertical plane including the axis of the cylinder bore 37, so that the size of the engine 31 can be reduced while securing a cooling adiabatic space for the cylinder portion 34a between the crank pedals 30 ..., thereby contributing more to compacter design of the motorcycle as a whole.

[0065]
Incidentally, the main frame 23 of the vehicle body frame 21 is formed to be hollow and inclined downwardly rearwards, the fuel tank 108 and the carburetor 99 disposed on the rear side of the fuel tank 108 are contained in the main frame 23, and the carburetor 99 is connected to the engine 31 disposed on the rear side of the main frame 23 through the intake pipe 98 extending in the front-rear direction of the vehicle body frame 21. [0066]
Therefore, there is no need for a space for securing an adiabatic space for the engine 31 in the vicinity of the main frame 23, a reduction in size of the main frame 23, namely, a reduction in size of the vehicle body can be achieved, so that seating on and getting off the seat 28 is facilitated, and the fuel tank 108 and the carburetor 99 can be effectively contained in the main frame 23. Besides, since the main frame 23 is inclined downwardly rearwards, the fuel conduits 118, 119 for supplying a fuel from the fuel tank 108 to the carburetor 99 can be naturally inclined downwardly rearwards, and the supply of the fuel to the carburetor 99 can be smoothened. [0067]

In addition, the air cleaner 111 disposed on the front side of the carburetor 99 is contained in the main frame 23, and the intake system of the engine 31 can be contained in a compact form in the main frame 23. [0068]
Further, the pedal shaft 58 capable of transmitting the tread force inputted from the crank pedals 30 ... provided at both ends to the rear wheel WR is disposed on the lower side than a rear end portion of the main frame 23, so that the intake system of the engine 31 can be disposed in a compact form in the vicinity of the crank pedals 30 ... which require a comparatively large rotational space. [0069]
Figs. 11 to 15 show a second embodiment of the present invention, wherein Fig. 11 is a side view of a pedaled motorcycle; Fig. 12 is an enlarged vertical sectional side view of a major portion of Fig. 11; Fig. 13 is a sectional view taken along line 13-13 of Fig. 12; Fig. 14 is an enlarged view of a major portion of Fig. 13; and Fig. 15 is a sectional view taken along line 15-15 of Fig. 14. [0070]
The second embodiment of the present invention will

now be described referring to Figs. 11 to 15, in which the same portions as those in the first embodiment above will be denoted by the same symbols in the figures, and the detailed description thereof will be omitted. [0071]
First, in Fig. 11, a vehicle body frame 141 of a pedaled motorcycle comprises a main frame 143 provided with a head pipe 142 at its front end and inclined downwardly rearwards, and a seat post 144 extended upwards from a rear portion of the main frame 143. [0072]
A front fork 145 is steerably supported on the head pipe 142, a front wheel WF is shaft-supported at the lower end of the front fork 145, and a bar-like steering handle 146 is provided at the upper end of the front fork 145. [0073]
A support pipe 148 provided at its upper end with a saddle-formed seat 147 for seating the driver is inserted into the seat post 144 from the upper side, and the support pipe 148 is fixed to the seat post 144 so that its vertical position can be adjusted. [0074]
A tread force generated when the rider on the seat

147 treads on a left-right pair of crank pedals 30 ... can be transmitted to a rear wheel WR, and an output of an engine 151 mounted on the vehicle body frame 141 can also be transmitted to the rear wheel WR. [0075]
Referring to Figs. 12 to 15 also, the engine 151 is a side valve type 4-cycle engine, and an engine main body 153 of the engine 151 comprises a cylinder block 154, an engine case 155 connected to a lower portion of the cylinder block 154, and a cylinder head 156 connected to an upper portion of the cylinder block 154. [0076]
The cylinder block 154 integrally has a cylinder portion 154a provided with a cylinder bore 37, and the engine main body 153 is rigidly attached to the vehicle body frame 141 so that the cylinder portion 154a disposed on the rear side of the seat post 144 is disposed along the seat post 144 while being inclined upwardly rearwards between the seat post 144 and the rear wheel WR. [0077]
The engine case 155 supports in common a crankshaft 45 and a pedal shaft 58 having an axis disposed on the downward extension line of the seat post 144 on the front side of the crankshaft 45, and is formed to be elongate


in the front-rear direction of the vehicle body frame 121 Moreover, the front end of the engine case 155 is connected to the vehicle body frame 121. [0078]
Most of the crankshaft 45 is contained in a crank chamber 152 formed in the engine case 155, and a piston 149 slidably fitted in a cylinder bore 37 is connected to the crankshaft 45 through a connecting rod 150. The crankshaft 45 has a pair of crank weights 45a, 45a, and is rotatably supported on a holder 50 fastened to the engine case 155 through ball bearings 53, 53. [0079]
A pair of balancers 54, 54 having a rotational axis on one diameter line of the crankshaft 45 and contained in the crank chamber 152 are disposed on both sides of the crankshaft 45 as viewed in the direction along the axis C of the cylinder bore 37, and the balancers 54, 54 are rotatably supported on the holder 5 0 through ball bearings 55, 55; 55, 55. [0080]
Balance weights 54a, 54a possessed respectively by the balancers 54, 54 are disposed between the crank weights 45a, 45a while being partly overlapped with the crank weights 45a, 45a as viewed in a direction parallel

to the axis of the crankshaft 45.
[0081]
The pedal shaft 58 is rotatably supported on the engine case 155 through ball bearings 59, 60 so as to have an axis on the downward extension line of the seat post 144, and the crank pedals 30 ... are provided respectively at both ends of the pedal shaft 58 on the outside of the engine case 155.
[0082]
In addition, the crankshaft 45 and the pedal shaft 58 are disposed side by side at such positions where the axis C of the cylinder bore 37 skewly intersects a straight line L connecting between the axes of the shafts 45, 58.
[0083]
A driving gear 56 is fixed to the crankshaft 45, and driven gears 57, 57 meshed with the driving gear 56 are fixed respectively to the balancers 54, 54. Therefore, the balancers 54, 54 are rotated in opposite directions around axes parallel to the crankshaft 45 in conjunction with the rotation of the crankshaft 45.
[0084]
A rotor 61" of a generator 63" is coaxially connected to the crankshaft 45 on the outside of the

crank chamber 152. On the other hand, a cooling fan 157 is relatively rotatably supported on the pedal shaft 58, and a driven gear 158 fixed to the cooling fan 157 is meshed with a driving gear 159 provided at the outer periphery of the rotor 61". Namely, the cooling fan 157 is rotated in conjunction with the rotation of the crankshaft 45. [0085]
The cooling fan 157 is contained in a fan case 160 provided in the engine case 155, and the fan case 160 is formed in a spiral shape with its upper end opened so as to suck cooling air from the upper side of the engine case 155 according to the rotation of the cooling fan 157 [0086]
Rotational power of the crankshaft 45 is transmitted to the rear wheel WR through a power transmission means 69" including a belt-type non-stage transmission 70 and a speed reduction gear train 175, and the power transmission means 69" is disposed on the left side of a vertical plane including the axis C of the cylinder bore 37 possessed by the engine 151, as viewed in the forward direction of the motorcycle. [0087]
A driving pulley 73 of the belt-type non-stage

transmission 70 is relatively rotatably supported on the pedal shaft 58 while being connected to the driving gear 159 rotated in conjunction with the rotation of the crankshaft 45, and an endless belt 75 is wrapped around the driving pulley 73 and a driven pulley 74 whose effective radius is varied according to variation in the effective radius of the driving pulley 73. [0088]
A transmission case 77" containing the driven pulley 74, a starting clutch 76 and the speed reduction gear train 175 is disposed on the left side of the rear wheel WR. The transmission case 77" is constituted of a rear portion of a support member 161 having its front end rigidly connected to the engine case 155 and extended to a lateral side of the rear wheel WR, and a rear portion of a case member 162 forming a left side outer wall of the engine case 155 and extended to a lateral side of the rear wheel WR so as to cover the power transmission means 69" from the outer side, and a left end portion of the axle 78 of the rear wheel WR is rotatably supported by a rear portion of the support member 161. [0089]
A back plate 80" of a drum brake 79 is disposed on the right side of the rear wheel WR as viewed in the

forward direction of the motorcycle. The back plate 80" is formed as one body with a rear portion of a support member 163 having its front end rigidly connected to the engine case 155 and extended to a lateral side of the rear wheel WR, and a right end portion of the axle 78 of the rear wheel WR is rotatably supported on the back plate 80" at the rear portion of the support member 163. [0090]
A driven sprocket 81 is attached to the axle 78 on the outer side than the back plate 80", and an endless chain 83 is wrapped around a driving sprocket 82 attached to the pedal shaft 58 and the driven sprocket 81. A case member 164 forming a right side outer wall of the engine case 155 is extended to a lateral side of the rear wheel WR while covering the driving sprocket 82, the chain 83 and the driven sprocket 81, and a rear portion of the case member 164 is connected to the back plate 80". [0091]
Between the cylinder block 154 and a cylinder head 156 of the engine 151 which is a side valve type 4-cycle engine, a combustion chamber 165 on which a portion of a top portion of the piston 149 fronts is formed with its center disposed at a position staggered to the front side from the axis C of the cylinder bore 37. The cylinder

head 156 is fitted with an ignition plug 86 whose inner end fronts on the combustion chamber 165.
[0092]
The cylinder block 154 is provided with an intake port (not shown) capable of communicating with the combustion chamber 165 so as to front on the front side, and is provided with an exhaust port capable of communicating with the combustion chamber 165 so as to be located on the left side as viewed in the forward direction of the motorcycle. An intake valve for switching between communication and shut-off between the intake port and the combustion chamber 165 and an exhaust valve 167 for switching between communication and shut-off between the exhaust port and the combustion chamber 165 are supported on the cylinder block 154 so that they can be opened and closed, and the valves are urged by springs in valve-closing directions.
[0093]
The intake valve and the exhaust valve 167 are driven to open and close by a valve-operating mechanism 168. The valve-operating mechanism 168 comprises a timing driving gear 169 fixed to one of the balancers 54, 54, a timing driven gear 171 meshed with the timing driving gear 169 and rotatably supported by the holder 50,


intake-side and exhaust-side cams 172, 173 formed as one body with the timing driven gear 171, an intake-side rocker arm (not shown) supported on the holder 50 so as to rock following up to the intake-side cam 172 and connected to and operated in conjunction with the intake valve, and an exhaust-side rocker arm 174 supported on the holder 50 so as to rock following up to the exhaust-side cam 173 and connected to and operated in conjunction with the exhaust valve 167. [0094]
The downstream end of an intake pipe 178 is connected to a front portion of the cylinder portion 154a of the cylinder block 154 so as to be communicated with the intake port, and the upstream end of the intake pipe 178 is connected to the downstream end of a carburetor 99 disposed on the upper side of the engine 151. [0095]
A containing case 179 supported by the seat post 144 of the vehicle body frame 141 is disposed on the rear side of the carburetor 99, and a fuel tank 180 is contained in the containing case 179. An openable lid 182 is provided at an upper portion of the containing case 179, at a portion corresponding to a fuel pouring-in cap 181 detachably fitted to the fuel tank 180.

[0096]
The containing case 179 functions also as a cleaner case of an air cleaner 183. The air cleaner 183 comprises a pipe 184 contained in the containing case 179 on the lower side of the fuel tank 180, having one end closed and having the other end connected to the upstream end of the carburetor 99, and a cleaner element 185 wound around the outer periphery of the pipe 184 inside the containing case 179, and the pipe 184 is provided with communication holes 186 at a portion around which the cleaner element 185 is wound. Namely, a pre-cleaning chamber 187 is formed in the containing case 179 at a portion other than the fuel tank 180 and the pipe 184, air flowing from the outside of the containing case 179 into the pre-cleaning chamber 187 is cleaned by flowing through the cleaner element 185 and the communication holes 186 into the pipe 184, and the cleaned air is conducted from the pipe 184 to the carburetor 99.
[0097]
The upstream end of an exhaust pipe 188 for conducting an exhaust gas from the engine 151 is connected to the cylinder portion 154a of the cylinder block 154 so as to be communicated with the exhaust port. The exhaust pipe 188 is extended downward along the rear

wheel WR between the engine 151 and the rear wheel WR, and the downstream end of the exhaust pipe 188 is connected to a muffler 189 supported by a support member 163 connected to the engine case 155 and is disposed on the right side of the rear wheel WR.
[0098]
Thus, the exhaust pipe 188 is disposed along the rear wheel WR between the engine 151 and the rear wheel WR, whereby a pair of support members 161, 163 connected to the engine case 155 and rotatably supporting the axle 78 of the rear wheel WR are disposed on the left and right sides of the exhaust pipe 188.
[0099]
According to the second embodiment, the cylinder portion 154a of the engine 151 supported on the vehicle body frame 141 with the crankshaft 45 disposed on the rear side of the pedal shaft 58 is disposed with an upwardly rearward inclination between the seat post 144 of the vehicle body frame 141 and the rear wheel WR, and the exhaust pipe 188 for conducting the exhaust gas from the engine 151 is disposed to extend downwards along the rear wheel WR between the engine 151 and the rear wheel WR and connected to the muffler 179, so that the performance of the engine 151 can be enhanced through

easily securing the length of the exhaust pipe while disposing the exhaust pipe 188 at a position away from the vehicle body frame 141 and away from the pedal shaft 58. [0100]
In addition, the pair of support members 161, 163 connected to the engine case 155 and rotatably supporting the axle 78 of the rear wheel WR are disposed on the left and right sides of the exhaust pipe 188, and the exhaust pipe 188 is surrounded by the seat post 144, the rear wheel WR and the pair of support members 161, 163 on the front, rear, left and right sides thereof, so that a protector or the like for exclusive use is unnecessitated, and the number of component parts can be reduced. [0101]
The front end of the engine case 155 supporting the crankshaft 45 and the pedal shaft 58 in common and formed to be elongate in the front-rear direction of the vehicle body frame 141 is connected to the vehicle body frame 141, and front portions of the support members 161, 163 are connected to rear portions of the engine case 155, so that the pedal shaft 58 is rotatably supported by the engine case 155 supporting the crankshaft 45, and the engine case 155 functions also as a part of the member

for supporting the rear wheel WR, whereby the number of
component parts can be more reduced.
[0102]
The engine main body 153 including the engine case 155 is rigidly attached to the vehicle body frame 141, and the pair of balancers 54, 54 are contained in the engine case 155 so as to be capable of rotation around an axis parallel to the crankshaft 45 in conjunction with the rotation of the crankshaft 45, so that vibration of the engine 151 is suppressed by the balancers 54, 54, and vibration of the vehicle body frame 141 due to the vibration of the engine can be reduced although the engine main body 153 is rigidly attached to the vehicle body frame 141. In addition, since the engine main body 153 is rigidly attached to the vehicle body frame 141, the feeling of rigidity at the time of treading on the crank pedals 30 ... at both ends of the pedal shaft 58 supported by the engine case 155 possessed by the engine main body 153 can be secured, and a vibration-isolating structure is unnecessitated, whereby the structure for supporting the engine main body 153 onto the vehicle body frame 141 can be made compact. [0103]
Besides, the balance weights 54a, 54a possessed by

the balancers 54, 54 are disposed between the crank weights 45a, 45a so as to be partly overlapped with the crank weights 45a, 45a as viewed in the direction parallel to the axis of the crankshaft 45, so that the width of the engine case 155 in the direction along the axis of the crankshaft 45 can be set small in spite of the presence of the balancers 54, 54, and the engine 151 can be prevented from being enlarged in size. [0104]
The balancers 54, 54 are disposed on both sides of the crankshaft 45 as viewed in the direction along the axis C of the cylinder bore 37 possessed by the engine main body 153, with its rotational axis on the extension of one diameter line of the crankshaft 45, so that the pair of balancers 54, 54 can be disposed in a compact form between the pair of crank weights 45a, 45a. [0105]
Besides, the crankshaft 45 and the pedal shaft 58 are disposed side by side at positions where the axis C of the cylinder bore 37 skewly intersects a straight line L connecting between the axes of the shafts 45, 58; therefore, even though the pair of balancers 54, 54 are a-isposed" on both sicfes of the crankshaft 45 as viewed in the direction of the axis of the cylinder bore 37, it is

possible to dispose the crankshaft 45 and the pedal shaft 58 as close as possible to each other, and a reduction in the size of the engine case 155 can be contrived.
[0106]
Since the crankshaft 45 and the balancers 54, 54 are supported by the holder 50 separate from the engine case 155, concentration of the balancer mass can be contrived, the rigidity of the holder 50 is easily enhanced, the vibration-isolating effect of the balancers 54, 54 is enhanced, and transmission of vibration to the engine case 155 can be more suppressed. As a result, transmission of vibration to the vehicle body frame 141 and the pedal shaft 58 can be more reduced, and a reduction in the weight of the engine case 155 can be contrived through securing the rigidity by the holder 50.
[0107]
The axis of the pedal shaft 58 is disposed on an imaginary extension line to the lower side of the seat post 144, and the cylinder portion 154a of the engine 151 supported on the vehicle body frame 141 with the crankshaft 45 disposed on the rear side of the pedal shaft 58 is disposed along the seat post 144 on the rear side of the seat post 144. Therefore, the intake system and exhaust system of the engine 151 can be disposed so

as to obviate interference with the space required for the rotation of the crank pedals 30 ... at both ends of the pedal shaft 58.
[0108]
While the embodiments of the present invention have been described above, the invention is not limited to or by the above embodiments, and various design modifications can be made without departure from the invention as set fourth in the claims.
[0109]
[Effects of the Invention]
Thus, according to the invention as set forth in claim 1, vibration of the vehicle body frame due to the vibration of the engine can be reduced, the feeling of rigidity at the time of treading on the pedals can be secured, and the structure for supporting the engine main body onto the vehicle body frame can be made compact. Besides, the width of the engine case in the direction along the axis of the crankshaft can be set small, and the engine can be prevented from being enlarged in size.
[0110]
According to the invention a set forth in claim 2, the pair of balancers capable of suppressing the rotational moment around the crankshaft can be disposed

in a compact form between the pair of crank weights. [0111]
According to the invention as set forth in claim 3, the vibration-isolating effect of the balancer is enhanced, whereby transmission of vibration to the engine case is more suppressed, and transmission of vibration to the vehicle body frame and the pedal shaft can be reduced more. Besides, by securing rigidity by the holder, a reduction in the weight of the engine case can be contrived. [0112]
According to the invention as set forth in claim 4, the crankshaft and the pedal shaft can be disposed as close as possible to each other, and a reduction in the size of the engine case can be contrived.

WE CLAIM :
1. A pedaled motorcycle which comprises a pedal shaft (58) capable
of transmitting a tread force inputted from pedals (30) provided at both
ends thereof to a rear wheel (WR), and an engine (31, 151) having a
crankshaft (45) rotated around an axis parallel to the pedal shaft (58)
and capable of transmitting rotational power to said rear wheel (WR), and
in which said crankshaft (45) having at least a pair of crank weights
(45a) is supported on an engine case (35, 155) of said engine (31, 151) ,
and said pedal shaft (58) is rotatably supported on said engine case (35,
155) , characterized in that an engine main body (33, 153) including said
engine case (35, 155) is rigidly attached to a vehicle body frame (21, 141),
and a balancer (54) having a balance weight (54a) disposed between said
crank weights (45a) so as to be partly overlapped with said crank weights
(45a) as viewed in a direction parallel to the axis of said crankshaft (45)
is contained in said engine case (35, 155) so as to be capable of rotating
around an axis parallel to said crankshaft (45) in conjunction with the
rotation of said crankshaft (45).
2. A pedaled motorcycle as claimed in claim 1, wherein a pair of said
balancers (54) having a rotational axis on the extension of one diameter
line of said crankshaft (45) are disposed on both sides of said crankshaft
(45) as viewed in the direction of the axis of a cylinder bore (37)
possessed by said engine main body (33, 153).


3. A pedaled motorcycle as claimed in claim 1 or 2, wherein said pedal shaft (58) is supported on said engine case (35, 155) through bearings (59, 60) , and said crankshaft (45) and said balancer (54) are supported on a holder (50) fitted to said engine case (35, 155) respectively through bearings (53, 55)
4. A pedaled motorcycle as claimed in claim 2, wherein said crankshaft (45) and said pedal shaft (58) are disposed side by side at such positions that the axis of said cylinder bore (37) skewly intersects a straight line (L) connecting the axes of said shafts (45, 58).
5. A pedaled motorcycle substantially as hereinbefore described with reference to the accompanying drawings.
Dated this 4th day of October, 2001.

Documents:

964-mum-2001-cancelled pages(25-7-2006).pdf

964-mum-2001-claims(granted)-(25-7-2006).doc

964-mum-2001-claims(granted)-(25-7-2006).pdf

964-mum-2001-correspondence(31-7-2006).pdf

964-mum-2001-correspondence(ipo)-(2-2-2006).pdf

964-mum-2001-drawing(10-1-2002).pdf

964-mum-2001-form 1(4-10-2001).pdf

964-mum-2001-form 18(4-10-2005).pdf

964-mum-2001-form 2(granted)-(25-7-2006).doc

964-mum-2001-form 2(granted)-(25-7-2006).pdf

964-mum-2001-form 3(1-4-2002).pdf

964-mum-2001-form 3(25-7-2006).pdf

964-mum-2001-form 3(4-10-2001).pdf

964-mum-2001-form 5(4-10-2001).pdf

964-mum-2001-power of authority(11-12-2001).pdf

964-mum-2001-power of authority(25-7-2006).pdf

abstract1.jpg


Patent Number 204646
Indian Patent Application Number 964/MUM/2001
PG Journal Number 24/2007
Publication Date 15-Jun-2007
Grant Date 28-Feb-2007
Date of Filing 04-Oct-2001
Name of Patentee HONDA GIKEN KOGYO KABUSHIKI KAISHA
Applicant Address 1-1,Minamiaoyama 2-chome, Minato-ku, Tokyo, Japan
Inventors:
# Inventor's Name Inventor's Address
1 MASAHIRO KUROKI c/o Kabushiki Kaisha Honda Gijutsu Kenkyusho, of 4-1,Chuo 1-Chome, Wako-shi, Saitama, Japan
2 YUTAKA INOMOTO c/o Kabushiki Kaisha Honda Gijutsu Kenkyusho, of 4-1,Chuo 1-Chome, Wako-shi, Saitama, Japan
PCT International Classification Number B 62 M 23/02
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 2000-403283 2000-12-28 Japan