Title of Invention

CONNECTION ARRANGEMENT BETWEEN A DRIVE OF A MOWING SICKLE AND A MOWING SICKLE

Abstract Connection arrangement between a drive of a mowing sickle and a linear reciprocating mowing sickle 1 comprising -first connection element 4 made from metal, which -forms either with the mowing sickle 1 one component or serves for the connection to the same, -is at least partially formed annularly and is provided with a circular cylindrical through bore 6,which forms a longitudinal axis 5, -which is slotted and is provided with clamping means 11 for changing the cross-section of the through bore 6, -an intermediate ring 14 made from metal,which -has a circular cylindrical outer face 19 adapted to the through bore 6, -has a hollow spherical inner face 18, -is accommodated with its outer face 18 in the through bore 6, -has on its circumference at least one slot, -a rotational rolling member bearing, which -has an outer bearing ring 20 made from metal and closed in circumferential direction, with a spherical outer bearing face 21, which is formed fittingly to the inner face 18 of the intermediate ring 14 and is enclosed by the intermediate ring 14 and which forms at least one outer race 22, -has at least one inner bearing ring 23, made from metal and closed in circumferential direction and which forms at least one inner race 24 and which has a through extending receiving bore 26, -has rolling members 25, which are arranged between the outer race 22 and the inner race 24, -a second connection element 27, which -comprises a driving trunnion 29, which rests in the receiving bore 26.
Full Text Connection arrangement between a drive of a mowing sickle and a mowing sickle
Description
The invention relates to a connection arrangement between a drive of a mowing sickle and a mowing sickle.
DE 40 35 528 C2 describes a connection arrangement between a drive of a mowing sickle and a linear reciprocating mowing sickle in double sickle cutting devices of front mowers.
The introduction of the lifting movement is achieved via a pivotably moved drive lever and a driving pin connected thereto, which represents a connection element in a further connection element comprising a pivoting bearing and connected to the mowing sickle. The pivoting bearing arrangement is necessary, as the driving trunnion is moved, because of its attachment to the drive lever following the pivot movement of the drive lever, on a circular track. As the mowing sickle is only guided linearly reciprocatingly, the arrangement has to allow constantly during operation a pivot movement of the driving trunnion relative to the connection element connected to the mowing sickle as well as an axial displacement of the driving trunnion. The first connection element serving for connecting the mowing sickle, has an annular formed portion and a circular cylindrical bore arranged therein. In this bore, an intermediate ring, closed in circumferential direction, is accommodated and retained with its circular cylindrical outer face adapted to the bore. The intermediate ring has a hollow spherical inner face. This hollow spherical inner face houses pivotably a bearing ring being closed in circumferential direction and housing a spherical outer face. The

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bearing ring has a circular cylindrical through bore. In this through bore, the driving trunnion rests displaceably along the axis of the through bore allowing to compensate for the position change, resulting from the movement of the driving trunnion with the drive lever on a circular track relative to the displacement axis of the mowing sickle.
However, also drives of mowing sickles are known, in which to the connection element, connected to the mowing sickle, a movement, corresponding to the linear reciprocating movement of the mowing sickle, is directly introduced by a gearing, as it is for example described in DE 39 31 736 C2. In this case no permanent relative movements have to be compensated in the connection arrangement between a connection element, formed as a driving trunnion, and a connection element, connected to the mowing sickle. However an adjustment has to be possible, which enables an adaptation of the relative positioning of the components to each other during the assembly. This adjustment has to be securely maintained and has to enable an easy detaching for the exchange, for example of the mowing sickle.
The invention is based on the object, to provide a connection arrangement between a drive of a mowing sickle and a mowing sickle, which enables a secure maintaining of the assembly position and enables for the removal and the renewed assembly an easy detachment and adaptation to the eventually changed assembly conditions, and furthermore, enables a long life span.
This object is solved according to the invention by a connection arrangement
between a drive of a mowing sickle and a linear reciprocating mowing sickle
comprising
-a first connection element made from metal, which
forms either with the mowing sickle one component or serves for the
connection to the same,
is at least partially formed annularly and is provided with a circular
cylindrical through bore, which forms a longitudinal axis,
which is slotted and is provided with clamping means for changing the
cross-section of the through bore,
-an intermediate ring made from metal, which

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has a circular cylindrical outer face adapted to the through bore, has a hollow spherical inner face, is accommodated with its outer face in the through bore, has on its circumference at least one slot,
-a rotational rolling member bearing, which
has an outer bearing ring made from metal and closed in circumferential
direction, with a spherical outer bearing face, which is formed fittingly to
the inner face of the intermediate ring and is enclosed by the
intermediate ring and which forms at least one outer race,
has at least one inner bearing ring, made from metal and closed in
circumferential direction and which forms at least one inner race and
which has a through extending receiving bore,
has rolling members, which are arranged between the outer race and
the inner race,
-a second connection element, which
comprises a driving trunnion, which rests in the receiving bore.
Of advantage in this embodiment is, that by means of the intermediate ring also made from metal as the other components, also when strongly pretensioned by the clamping means no deformation occurs, which makes a detaching of the connection difficult. After detaching the clamping means, free pivot movements of the rotational rolling member bearing relative to the intermediate ring and adjustments of the intermediate ring along the longitudinal axis in the first connection element can be carried out. This is especially advantageous, when the intermediate ring is made from steel. Also all other components of the connection arrangement can advantageously be made from steel. The connection arrangement is also compact, as the outer bearing ring represents at the same time the element, which is pivotably held in the intermediate ring. Advantageous is also, that because of the above described nesting, forces, which act onto the connecting arrangement, always act centrally onto the bearing ring. Due to the manufacture of the intermediate ring from metal, an advantageous heat conduction away from the rotational rolling member bearing to the outside is achieved. This is also supported by the direct contact of the components made from metal.

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An advantageous force carrying is achieved, when the rotational rolling member bearing is formed as a double taper roller bearing.
The slotted construction of the first connection element is preferably achieved such, that the first connection element has along the longitudinal axis a first front face and a second front face and that the first connection element is interrupted by a first slot, which extends between the first front face and the second front face. In this case, this first slot extends suitably parallel to the longitudinal axis.
To achieve a clamping, by means of which the cross-section of the through bore is reduced, it is provided that at both sides of the first slot projecting lugs are formed on the first connection element, which have through holes and to which at least one clamping screw is arranged.
The intermediate ring has along the longitudinal axis a first end face and a second end face. An advantageous design of the intermediate ring is achieved, that this is interrupted on its circumference by a second slot extending between the first end face and the second end face. In this case, the second slot can extend, projected onto the longitudinal axis, parallel thereto or intersecting the longitudinal axis. Alternatively, it is possible, that the intermediate ring has along the longitudinal axis a first end face and a second end face and is provided on its circumference with second slots extending from the one or both end faces, which, respectively, end in front of the other end face. In this case, it can be, preferably, provided, that the second slots, extending from different end faces, are arranged alternately over the circumference of the intermediate ring and extend, preferably, parallel to the longitudinal axis.
A preferred embodiment of the invention is shown schematically in the drawing.
It shows
Fig. 1 a top view of a connection arrangement according to the invention with

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the connection to the mowing sickle,
Fig. 2 a view in the direction of the arrow X of Fig. 1,
Fig. 3 a sectional view along a longitudinal axis through the connection
arrangement,
Fig. 4 a view comparable to Fig. 2, wherein, however, the first connection
element is removed, and
Fig. 5 an alternative design of an intermediate ring.
From the view of Fig. 1 a portion of a mowing sickle 1 with the sickle-bar 2 and a blade 3, attached thereto, is visible, wherein in the drawing plane in the extension of the sickle-bar 2 a multitude of such blades 3 are mounted on the sickle-bar 2. At the end of the sickle-bar 2 a first connection element 4 made from metal and in the form of a knife head eye is attached, which has a first front face 7 and a second front face 8 and a through bore 6 extending through the same and between the two front faces 7, 8 and centred on a longitudinal axis 5.
As especially visible from Fig. 2, the first connection element 4, formed like a ring, is slotted. A first slot 9 extends between the two front faces 7, 8. The first slot 9 extends parallel to the longitudinal axis 5. However, it also could be arranged at an angle thereto.
At both sides of the first slot 9 two lugs 10, projecting away from the longitudinal axis 5, are provided. One of these two lugs 10 is provided with a through extending bore 12, which is arranged on an axis, intersecting with a distance the longitudinal axis 5. On the axis of this bore 12, in the second lug 10 a threaded bore 13 is provided. A clamping screw 11, especially a cap screw, passes through the bore 12 and is screwed into the threaded bore 13, so that it causes a reduction of the cross-section of the through bore 6, depending on the extent it is tightened.

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In the circular cylindrical through bore 6, a metal intermediate ring 14 rests, as especially visible from Fig. 3. This intermediate ring 14 has a first end face 16 and a second end face 17 along the longitudinal axis 5 and is interrupted on its circumference by a second slot 15, which extends between the first end face 16 and the second end face 17. This slot is, as visible from Fig. 4, aligned parallel to the longitudinal axis 5, but can also extend at an angle thereto, so that it intersects the same.
The intermediate ring 14 is, preferably, made from a steel, so that, when no pressure acts on the same transversally to the longitudinal axis 5, it holds open elastically the second slot 15. The intermediate ring 14 has a hollow spherical inner face 18 and a circular cylindrical outer face 19. It is accommodated with the circular cylindrical outer face 19 in the circular cylindrical through bore 6 of the first connection element 4 and is adjustable therein along the longitudinal axis 5. This means, that the distance between the first front face 7 and the second front face 8 of the first connection element 4 is larger than the distance between the first end face 16 and the second end face 17 of the intermediate ring 14.
The rotational rolling member bearing comprises an outer bearing ring 20, which is closed in circumferential direction and has a spherical outer bearing face 21. The spherical outer bearing face 21 is adapted to the hollow spherical inner face 18 of the intermediate ring 14. The assembly of the intermediate ring 14 on the outer bearing ring 20 can be achieved by an elastic expansion of the intermediate ring because of the second slot 15 and the hollow spherical inner face 18 on the spherical outer bearing face 21 of the outer bearing ring 20.
The outer bearing ring 20 is held by this arrangement pivotably in the intermediate ring 14.
The outer bearing ring 20 has two conical outer races 22, which diameter decreases towards each other. Furthermore, two inner bearing rings 23 are provided, as they are common in taper roller bearings. These two inner bearing rings 23 have, respectively, an inner race 24. Between the outer race 22 of the outer bearing ring 20

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and the inner race 24 of each inner bearing ring 23 in total two rows of rolling members in form of tapered rollers are arranged in circumferential direction. Instead of a taper roller bearing also, for example, a double row angular contact ball bearing can be provided. The two inner bearing rings 24 form together a receiving bore 26, which is formed circular cylindrically and in which the driving trunnion 29, belonging to the second connection element in form of a connection block, is securely accommodated. The driving trunnion 29 ends in a shoulder 31. One of the inner bearing rings 23 abuts this shoulder 31. The two inner bearing rings 23 are forced against this shoulder 31 by an attachment ring 30, which is retained by a screw 33, which is screwed into the driving trunnion 29 along the longitudinal axis. Thus, the two bearing rows of the rotational rolling member bearing, formed as a taper roller bearing, are pre-tensioned. The rotational rolling member bearing can be manufactured from a metal, which is appropriate for such bearings and loadings, as they are common in drives of mowing sickles.
The sealing is achieved by the design of the attachment ring 30 in connection with a seal 32 and furthermore in direction towards the shoulder 31 also by a seal 32 and a protective ring 28.
The correct position of the second connection element 27 and especially of the driving trunnion 29 in pivot direction around the fulcrum formed by the hollow spherical inner face 28 and the spherical outer bearing face 20 and arranged on the longitudinal axis 5, according to assembly conditions, i.e. also in an inclined position and a position of the intermediate ring 14 adjusted along the axis of the through bore 6, can be fixed such, that the clamping means in form of a clamping screw 11 are tightened. Thus, the cross-section of the through bore 6 is reduced in such a manner, that a radial force acts on the intermediate ring 14. As the intermediate ring 14 itself has a slot, i.e. has a second slot 15 between its end faces 16, 17, also the diameter of this intermediate ring 14 can be reduced and this presses with its hollow spherical inner face 18 against the spherical outer bearing face 21 of the outer bearing ring 20. Thus, the same is fixed. The outer bearing ring 20 is selected in its dimensions such, that itself does not experience a deformation and, thus, also the clamping forces do not have any influence on the bearing play and the running conditions of the

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rotational rolling member bearings.
By forming the intermediate ring from a metal and especially from steel, which is elastic such, that it can take up its original shape, in which the slot has in the relaxed condition its largest width, the clamping effect is effectively cancelled after the unscrewing of the clamping screw and, thus, a repeated smooth adjustment is possible.
Fig. 5 shows an intermediate ring 114, shown in relation to the other drawings in an enlarged scale as an individual component in a side view, in an embodiment changed to the other Figures. The inner face is also formed as a (not visible) hollow spherical face. The intermediate ring 114 is provided on its circumference around the longitudinal axis 105 with second slots 115. A partial number of the second slots 115 extends from the end face 116 and ends in front of the end face 117. The residual number of second slots 115 extends from the end face 117 and ends in front of the end face 116. The second slots 115 are alternately distributed starting from the one end face 116 and the other end face 117 on the circumference of the intermediate ring 114. By means of this arrangement, the intermediate ring 114 can be radially elastically deformed and holds the outer bearing ring of the rotational rolling member bearing in a clamped condition. The intermediate ring 114 is also made from metal, especially steel. Besides steel, also other metals can be used. The second slots 115 extend parallel to the longitudinal axis 105.

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Bezugszeichenliste

1 mowing sickle
2 sickle-bar
3 blade
4 first connection element/ sickle head eye
5, 105 longitudinal axis
6 through bore
7 first front face
8 second front face
9 first slot
10 lug
11 clamping screw
12 bore
13 threaded bore
14, 114 intermediate ring
15, 115 second slot
16, 116 first end face
17, 117 second end face
18 hollow spherical inner face
19 circular cylindrical outer face
20 outer bearing ring
21 spherical outer bearing face
22 outer race
23 inner bearing ring
24 inner race
25 rolling member
26 receiving bore
27 second connection element/ connection block
28 protective ring
29 driving trunnion
30 attachment ring
31 shoulder
32 seal
10

33 screw

-11 -
Connection arrangement between a drive of a mowing sickle and a mowing sickle
Claims
1. Connection arrangement between a drive of a mowing sickle and a linear reciprocating mowing sickle (1) comprising
a first connection element (4) made from metal, which
forms either with the mowing sickle (1) one component or serves
for the connection to the same,
is at least partially formed annularly and is provided with a
circular cylindrical through bore (6), which forms a longitudinal
axis (5),
which is slotted and is provided with clamping means (11) for
changing the cross-section of the through bore (6),
an intermediate ring (14, 114) made from metal, which
has a circular cylindrical outer face (19) adapted to the through
bore (6),
has a hollow spherical inner face (18),
is accommodated with its outer face (18) in the through bore (6),
has on its circumference at least one slot (15, 115),
a rotational rolling member bearing, which
has an outer bearing ring (20) made from metal and closed in circumferential direction, with a spherical outer bearing face (21), which is formed fittingly to the inner face (18) of the intermediate ring (14) and is enclosed by the intermediate ring (14) and which forms at least one outer race (22),

-12 -
has at least one inner bearing ring (23), made from metal and closed in circumferential direction and which forms at least one inner race (24) and which has a through extending receiving bore (26),
has rolling members (25), which are arranged between the outer race (22) and the inner race (24), a second connection element (27), which
comprises a driving trunnion (29), which rests in the receiving bore (26).
Connection arrangement according to claim 1,
characterised in that
the rotational rolling member bearing is formed as a double taper roller
bearing.
Connection arrangement according to claim 1,
characterised in that
the first connection element (4) has along the longitudinal axis (5) a first front
face (7) and a second front face (8) and that the first connection element (4) is
interrupted by a first slot (9), which extends between the first front face (7) and
the second front face (8).
Connection arrangement according to claim 3,
characterised in that
at both sides of the first slot (9) lugs (10) are formed on the first connection
element (4), which have through holes and to which at least one clamping
screw (11) is arranged.
Connection arrangement according to claim 1,
characterised in that
the intermediate ring (14) has along the longitudinal axis (5) a first end face
(16) and a second end face (17) and
that the intermediate ring (14) is interrupted by a second slot (15) extending

13
between the first end face (16) and the second end face (17).
Connection arrangement according to claim 1,
characterised in that
the intermediate ring (114) has along the longitudinal axis (115) a first end
face (116) and a second end face (117) and that it is provided on its
circumference with second slots (115) extending from one or both end faces
(116, 117) and which end, respectively, in front of the other end face (116,
117).
Connection arrangement according to claim 6,
characterised in that
the second slots (115), starting from different end faces (116, 117), are
arranged alternately over the circumference of the intermediate ring (114).
Connection arrangement according to claim 5,
characterised in that
the second slot (15), projected onto the longitudinal axis (5), extends parallel
thereto or intersects the longitudinal axis (5).
Connection arrangement according to claim 6,
characterised in that
the second slots (115) extend parallel to the longitudinal axis (105).

Connection arrangement between a drive of a mowing sickle and a linear
reciprocating mowing sickle 1 comprising
-first connection element 4 made from metal, which
forms either with the mowing sickle 1 one component or serves for the
connection to the same,
is at least partially formed annularly and is provided with a circular
cylindrical through bore 6, which forms a longitudinal axis 5,
which is slotted and is provided with clamping means 11 for changing
the cross-section of the through bore 6,
-an intermediate ring 14 made from metal, which
has a circular cylindrical outer face 19 adapted to the through bore 6, has a hollow spherical inner face 18, is accommodated with its outer face 18 in the through bore 6, has on its circumference at least one slot,
-a rotational rolling member bearing, which
has an outer bearing ring 20 made from metal and closed in circumferential direction, with a spherical outer bearing face 21, which is formed fittingly to the inner face 18 of the intermediate ring 14 and is enclosed by the intermediate ring 14 and which forms at least one outer race 22,
has at least one inner bearing ring 23, made from metal and closed in circumferential direction and which forms at least one inner race 24 and
which has a through extending receiving bore 26, has rolling members 25, which are arranged between the outer race 22 and the inner race 24, -a second connection element 27, which
comprises a driving trunnion 29, which rests in the receiving bore 26.

Documents:

00206-kol-2007-correspondence-1.1.pdf

00206-kol-2007-correspondence-1.2.pdf

00206-kol-2007-correspondene-1.3.pdf

00206-kol-2007-correspondene-1.4.pdf

00206-kol-2007-form-18.pdf

00206-kol-2007-others document.pdf

00206-kol-2007-p.a.pdf

00206-kol-2007-priority document-1.1.pdf

0206-kol-2007-abstract.pdf

0206-kol-2007-claims.pdf

0206-kol-2007-corresp0ndence others.pdf

0206-kol-2007-description (complete).pdf

0206-kol-2007-drawings.pdf

0206-kol-2007-form2.pdf

0206-kol-2007-form3.pdf

0206-kol-2007-form5.pdf

0206-kol-2007-priority document.pdf

206-KOL-2007-ABSTRACT 1.1.pdf

206-KOL-2007-CANELLED PAGES.pdf

206-KOL-2007-CLAIMS 1.1.pdf

206-KOL-2007-CORRESPONDENCE 1.2.pdf

206-KOL-2007-CORRESPONDENCE OTHERS 1.5.pdf

206-KOL-2007-CORRESPONDENCE OTHERS 1.6.pdf

206-kol-2007-correspondence.pdf

206-KOL-2007-DESCRIPTION (COMPLETE) 1.1.pdf

206-KOL-2007-DRAWINGS 1.1.pdf

206-kol-2007-examination report.pdf

206-KOL-2007-FORM 1.1.1.pdf

206-kol-2007-form 18.pdf

206-KOL-2007-FORM 2.1.1.pdf

206-kol-2007-form 26.pdf

206-KOL-2007-FORM 3.1.1.pdf

206-kol-2007-form 3.pdf

206-kol-2007-form 5.pdf

206-KOL-2007-FORM-27.pdf

206-kol-2007-granted-abstract.pdf

206-kol-2007-granted-claims.pdf

206-kol-2007-granted-description (complete).pdf

206-kol-2007-granted-drawings.pdf

206-kol-2007-granted-form 1.pdf

206-kol-2007-granted-form 2.pdf

206-kol-2007-granted-letter patent.pdf

206-kol-2007-granted-specification.pdf

206-KOL-2007-OTHERS.pdf

206-KOL-2007-PA 1.1.pdf

206-KOL-2007-PRIORITY DOCUMENT 1.2.pdf

206-kol-2007-priority document.pdf

206-kol-2007-reply to examination report.pdf

206-kol-2007-translated copy of priority document.pdf

Abstract.jpg


Patent Number 245753
Indian Patent Application Number 206/KOL/2007
PG Journal Number 05/2011
Publication Date 04-Feb-2011
Grant Date 31-Jan-2011
Date of Filing 08-Feb-2007
Name of Patentee GUNTER SCHUMACHER
Applicant Address RAIFFEISENSTRASSE 10,57612 EICHELHARDT
Inventors:
# Inventor's Name Inventor's Address
1 GUNTER SCHUMACHER RAIFFEISENSTRASSE 10 57612 EICHELHARDT
2 HEINRICH-GUNTER SCHUMACHER GOLDWIESE 11, 57612 EICHELHARDT
PCT International Classification Number A01D34/13,34/33
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 102006010825.6 2006-03-07 Germany