Title of Invention

INFINITELY ADJUSTABLE GEAR

Abstract To improve the control of a connecting link between two gear link members of an infinitely adjustable gear, the invention propose an infinitely ajustable gear with at least two gear link members and at least one connecting link which actively connects the gear link members to each other and is arranged so that its position is infinitely displaceable relative to the gear link members, herein the connecting link is arranged in a guiding device which is swivelled about a rotary shaft.
Full Text INFINITELY ADJUSTABLE GEAR
The invention relates to an infinitely adjustable gear with at least two gear link members and at least one connecting link, which actively connects the gear link members to each other and is arranged so that its position is infinitely displaceable relative to the gear link members.
There ,is already a multiplicity of infinitely adjustable gears in which the position of a connecting link, which connects two gear link members together, is infinitely adjustable relative to these gear link members. For example, a bevel friction ring gear is disclosed in GB-PS 298 676. In the embodiment described there a guide element is guided parallel with the axes of the frictional bevel wheels on a guide shaft, which element guides the friction ring along the frictional bevel wheels. This ensures infinite adjustment of the reduction ratio of the bevel friction ring gear. However, a special drive is required for adjusting the friction ring, which makes the gear very expensive to design.
The object of this invention is to improve the control of the friction ring to the extent that an infinitely adjustable gear is kept as small as possible and so that it can also be advantageously used as a vehicle gear in particular. The object of the invention is achieved by an infinitely adjustable gear with at least two gear link members and at least one connecting link which actively connects the gear link members together and is arranged so that its position is infinitely displaceable relative to the gear link members, where the connecting link is arranged in a guiding device which is swivelled about a rotary shaft whose axial direction comprises a component which is arranged parallel with a clamped plane through both axes of the gear link members. This ultimately means that the rotary shaft is arranged parallel with or in this

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plane, or that the rotary shaft intersects this plane at an acute angle. Advantageously the connecting link is displaced, for example, translatorily by means of a displaceable bracket, relative to the gear link members, when the guiding device is swivelled about the rotary shaft. The connecting link is displaced translatorily into a first direction or a second direction opposing the first direction, according to the direction in which, the guiding device is rotated about the rotary shaft.

In particular, the translatory movement may in this case due solely to the rotation of the two gear link members, so that forces need only be applied separately for the swivel movement about the rotary shaft, whilst the forces required in any case for the displacement or translatory movement are supplied by the gear line itself or by the rotation of the two gear link members and the connecting link.
The term "guiding device" is understood in this case to refer to a structure in which the connecting link is on the one hand rotatably mounted and on the other can also be displaced translatorily by means of the guiding device relative to the gear link members.
Because the translatory movement of the connecting link is generated essentially by a rotary movement of the guiding device, it is possible to displace the position of the connecting link relative to the gear link members infinitely in an extremely simple structure. This infinitely adjustable gear is therefore designed extremely small in size.
IN order to achieve the position of such a connecting link more reliably and with less interference, the infinitely adjustable gear may also have a mechanical position
recording system which transmits a mechanical position

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signal through a partition, independently of the other characteristics of this invention.
Here it is particularly advantageous for the mechanical position recording or the mechanical position signal also to be able to determine and transmit accurate data, even under structurally difficult operating conditions. For example, it is possible, due to the provision of the mechanical position signal, to dispense with electronic components and/or optical components in the immediate vicinity of the gear link members or the connecting link. In particular, electronic or optical components in the immediate vicinity of the gear link members may be dispensed with according to the invention, so that high temperatures prevailing there and the presence of a traction fluid do not adversely influence the position recording system described here. The position determining system is therefore designed so that it is highly resistant to faults, so that extremely reliable position determination is guaranteed.
The object of the invention is also achieved by an infinitely adjustable gear with at least two gear link members and at least one connecting link, which actively connects the gear link members to each other and is arranged so that its position can be infinitely displaced relative to the gear link members, where the infinitely adjustable gear has a position recording system with which the position of the connecting link relative to at least one gear link member can be determined when the gear is stationary. As a result of such position recording information is available on the position of the connecting link at any time, even when the gear or engine is stationary. This enables the position of the connecting link to be determined advantageously, regardless of the operating condition of any infinitely adjustable gear. It is also possible to determine the position of a connecting

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link relative to at least one gear link member extremely accurately, even if there is slip between the individual link members, since this mechanical position recording or this mechanical position signal can record and transmit the position independently of a speed determination.
This invention is particularly suitable for use on a bevel ring gear of prior art in which a torque, for example, is transmitted from an input cone via a rotary friction ring to an output cone, or in the reverse direction.
The term "mechanical position signal", within the meaning of the invention, describes any components which are capable of transmitting the position of the connecting link mechanically from a first region to a second region. In this case the term "first region" refers preferably to the region of the infinitely adjustable gear in which the gear link members or the connecting link are arranged directly. The term "second region", within the meaning of the invention, comprises either a region of the infinitely adjustable gear which differs from the first region, or a region which is arranged entirely outside the infinitely adjustable gear. In any case the first and second regions differ essentially in terms of the prevailing conditions, which vary considerably in the first or second regions during operation of the infinitely adjustable gear.
An embodiment provides that the mechanical position signal is transmitted to data recording and/or data processing means. This ensures that the information that supplies the mechanical position signal, according to the friction ring position, is recorded and also processed safely and effectively. It has been shown that such data recording and/or data processing means can be realised economically and particularly favourably by standardised optical and/or electronic components.

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An embodiment provides that the partition is a housing wall of the infinitely adjustable gear. It is therefore possible to transmit gear data extremely reliably to data recording and/or data processing means.
In this connection it is particularly advantageous for the partition to be a fluid space wall of the infinitely adjustable here. This guarantees that the mechanical position signal can be determined reliably in a fluid space filled . with a traction fluid, for example, and can be reliably transmitted from this fluid space.
By guiding the mechanical position signal through such partitions it is possible to arrange data recording and/or data processing means far enough from the high temperature regions of the infinitely adjustable gear so that standard optical components and standard electronic components can be used as data recording and/or data processing means.
It is particularly advantageous for a mechanical position signal to be arranged through a partition, whether this is a fluid space wall or a housing wall of the infinitely adjustable gear, by extremely simple structural means, since the generation of a mechanical position signal through such walls is already easily achievable based on the state of the art. Such a mechanical position signal only imposes moderate demands on design solutions relating to an infinitely adjustable gear, particularly in view of the sealing problems.
A particularly preferred exemplary embodiment provides that a translatory position signal is converted to a rotary position signal. Consequently the mechanical position signal can be integrated in an infinitely adjustable gear with a considerable saving of space. Since such conversion mechanisms are sufficiently known from the state of the

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art, the mechanics of such a mechanical position signal can be transmitted extremely reliably.
In this connection it has provide particularly advantageous for the infinitely displaceable connecting link to have a guiding device which is mounted on a rotary shaft and for the rotary shaft to have a rotary position signal. Consequently the infinitely adjustable gear, with this mechanical position recording and mechanical position signal, * is extremely space saving in its construction, since the rotary shaft of a guiding device provided in any case of an infinitely displaceable connecting link, e.g. the guiding device of a friction ring, is used as the mechanical position signal. In particular, sealing tasks can therefore be performed extremely easily since the sealing of a rotatably moved rotary axis, which passes through a partition, can be achieved relatively easily and at low cost.
Further advantages, objectives and characteristics of this invention are explained with reference to the following description of the attached drawing, which shows as an example a mechanical position signal in connection with a guiding device, partially shown.
Figure 1 shows diagrammatically a partial view of a guiding device,
Figure 2 shows diagrammatically an elevation of the guiding device shown in Figure 1,
Figure 3 shows diagrammatically a side elevation of the guiding device shown in Figures 1 and 2,
Figure 4 shows a perspective elevation of the guiding device shown in the previous figures,

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Figure 5 shows diagrammatically a view from below of the guiding device in the previous figures,
Figure 6 shows diagrammatically a partial view of a mechanical positioning bar,
Figure 7 shows diagrammatically an alternative guiding device with a positioning bar arranged on it,
Figure 8 shows diagrammatically a cross-section through a bevel friction ring gear shown in Figure 9 alone
«
line I - I,
Figure 9 shows diagrammatically an elevation of the bevel friction ring gear shown in Figure 8 and
Figure 10 shows diagrammatically a longitudinal section through a bevel friction ring gear on a vehicle drive for a front drive.
Guiding device 1 shown in Figure 1 guides a friction ring 2. Friction ring 2 is mounted rotatably about shaft 5 by means of guide rolls 3 (here denoted by figures as an example only) in the direction of double arrow 4. So that friction ring 2 is also able to perform a translatory movement in the direction of double arrow 6, in addition to its rotary movement in the direction of double arrow 4, guiding device 1 has two guide shafts 7 (here numbered merely as an example) , on which a guide slide 8 can be moved translatorily in the direction of double arrow 6.
Guiding device 1 is actively connected in its lateral region 9 to an adjusting shaft 10, ensuring that the entire guiding device can be rotated about a rotary shaft 112. Guide slide 8, with friction ring 2 arranged in it, moves along shaft 5 in one of the two directions of double arrow

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6, according to how guiding device 1 is positioned by adjusting shaft 10 about rotary shaft 11.
In the region of its connecting bridge 12 (numbered here for example only), guide slide 8 has a connector 13 by which guide slide 8 is actively connected to a mechanical positioning bar 14. In this exemplary embodiment mechanical positioning bar 14 is a component of a swivel bearing arrangement 15, which is arranged rotatably about rotary shaft 11 on guide device 1. Swivel bearing arrangement 15 comprises not only positioning bar 14 and further component groups not explicitly described here, but also a positioning gear ring 16.
Because of guiding device 1 shown here, and in particular positioning bar 14 and swivel bearing arrangement 15, with positioning gear ring 16, it is possible for the position of friction ring 2 in the region of guiding device 1 to be transmitted mechanically and accurately to a data recording and/or processing unit (not shown here). A linear movement of friction ring 2 along shaft 5, and hence also a position variation of friction ring 2, is also converted to a rotary position signal by means of positioning bar 14, which signal is incorporated in this exemplary embodiment by positioning gear ring 16.
Friction ring 2 is positioned according to the exemplary embodiment in Figure 1 relative to guiding device 1 in front position 17. A position of friction ring 2 different from front position 17 is shown by way of example with reference to a rear position 18 into which guide slide 8, and hence also friction ring 2, can be displaced.
Guide device 1 is shown in Figures 2 to 6 from different perspectives and sections.

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According to Figure 6 positioning bar 14 is shown in a rear position 18, wherein guide slide 8 is moved along shaft 5 into rear position 18. Positioning bar 14 has therefore performed a rotary movement about rotary shaft 11 according to arrow direction 19, since positioning bar 14 is connected by connector 13 to guide slide 18. A translatory movement according to double arrow 6 is therefore converted to a rotary movement according to direction of rotation 19.
Exemplary embodiment 100 according to Figure 7 shows essentially a swivel bearing positioning device 115, which is actively connected to a guide slide 108 by a positioning bar 114 and a connector 113. In this case guide slide 108 moves along shaft 105 on guide shafts 107 (numbered here solely by way of example), during which swivel bearing positioning device 115 performs a rotation about rotary shaft 111 in the case of such a translatory movement in one of the directions of double arrow 106.
According to the exemplary embodiment shown in Figures 1 to 6, guide slide 108 also has guide rolls 103 (numbered here solely b way of example) in this exemplary embodiment 108, which rolls guide friction ring 102, so that friction ring 103 can on the one hand be moved translatorily along shaft 105, and on the other hand is able to perform a rotary movement about shaft 105.
Bevel frictional gear 230, shown ion Figures 8 to 10, consists essentially of two frictional bevel wheels 233 and
234 arranged on parallel shafts 231 and 232, separated by -a
radial distance, which wheels are arranged in opposite
directions to each other, and have the same bevel angles
235 and 236 respectively (see Figure 10) . A friction ring
237, which surrounds friction bevel wheel 233 and is
retained in a guide slide 208, is arranged between
frictional bevel wheels 233 and 234. In this exemplary
embodiment guide slide 208 consists of a frame which is
234
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formed from two connecting bridges 212 (numbered here solely by way of example) . Guide slide 208 is mounted on guide shafts 207, which are parallel with shafts 231 and 232. Guide slide 208 has guide rolls 203 and these engage on both sides of friction ring 202, providing it with the required axial guidance.
Guiding device 201 of friction ring bevel gear 230 is swivelled about rotary shaft 211 by means of an adjusting motor 237. If guiding device 201 is swivelled about rotary shaft 211 by only a few angles of incidence, the drive effects an axial adjustment of guide slide 208, and hence a variation in the reduction ratio of frictional bevel wheels 233 and 234. A low energy expenditure is sufficient for this purpose.
Bevel friction ring gear 230 shown ion Figure 10 is provided with a vehicle drive for a front drive 238, the mode of operation of which drive is not explained in further detail here. Frictional bevel wheels 233 and 234 are mounted both axially and radially by means of suitable rolling bearing arrangements 239 (numbered here solely by way of example).

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CLAIMS
1. An infinitely adjustable gear with at least two gear
link members (frictional bevel wheels 233, 234) and at
least one connecting link (friction ring 237), which
actively connects the gear link members to each other,
and is arranged so that its position is infinitely
displaceable relative to the gear link members,
characterised in that the connecting link (friction
ring 237) is arranged in a guiding device which is
swivelled about a rotary shaft (211) whose axial
direction comprises a component which is arranged
parallel with a clamped plane through the two shafts
(231, 232) of the gear link members (frictional bevel wheels 233, 234) .
2. The infinitely adjustable gear according to Claim 1,
characterised in that the guiding device comprises a
displaceable bracket (guide side 8) for the connecting
link.
3. The infinitely adjustable gear according to Claim 1 or
2, characterised in that forces intrinsically required
for the displacement or translatory movement of the
connecting link (friction ring 237) are generated by
the rotation of the two gear link members (frictional
bevel wheels 233, 234) and of the connecting link.
4 . The infinitely adjustable gear according to any one of Claims 1 to 3, characterised by a mechanical position recording system which transmits a mechanical apposition signal through a transition.
5. The infinitely adjustable gear (230) according to Claim 4, characterised in that the partition is a housing wall of the infinitely adjustable gear (230) .

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6. The infinitely adjustable gear (230) according to
Claim 4, characterised in that the partition is a
fluid space partition of the infinitely adjustable
gear (230).
7. The infinitely adjustable gear according to any one of
the preceding claims, characterised by a position
recording system with which the position of the
connecting link relative to at least one gear link
member can be determined when the gear is stationary.
8. The infinitely adjustable gear (230) according to any
one of Claims 1 to 7, characterised in that a
mechanical position signal is connected to data
recording and/or data processing means.
9. The infinitely adjustable gear (230) according to any
one of Claims 1 to 8, characterised in that a
translatory position signal is converted to a rotary
position signal.
10. The infinitely adjustable gear (230) according to any
one of Claims 1 to 9, characterised in that the
infinitely adjustable connecting link has a guiding device which is mounted on a rotary shaft (11; 211), wherein the rotary shaft (11, 211) has a rotary position signal.
Dated this 23rd day of JUNE 2006.


Documents:

01754-kolnp-2006 abstract.pdf

01754-kolnp-2006 claims.pdf

01754-kolnp-2006 correspondence others.pdf

01754-kolnp-2006 description(complete).pdf

01754-kolnp-2006 drawings.pdf

01754-kolnp-2006 form-1.pdf

01754-kolnp-2006 form-2.pdf

01754-kolnp-2006 form-3.pdf

01754-kolnp-2006 form-5.pdf

01754-kolnp-2006 international publication.pdf

01754-kolnp-2006 international search authority report.pdf

01754-kolnp-2006-correspondence others-1.1.pdf

01754-kolnp-2006-correspondence-1.2.pdf

01754-kolnp-2006-form-18.pdf

01754-kolnp-2006-form-26.pdf

01754-kolnp-2006-pct request.pdf

01754-kolnp-2006-priority document.pdf

1754-KOLNP-2006-(19-12-2011)-FORM-27.pdf

1754-KOLNP-2006-ABSTRACT 1.1.pdf

1754-KOLNP-2006-ABSTRACT 1.2.pdf

1754-KOLNP-2006-AMANDED CLAIMS.pdf

1754-KOLNP-2006-CANCELLED PAGES.pdf

1754-KOLNP-2006-CLAIMS 1.1.pdf

1754-KOLNP-2006-CORRESPONDENCE 1.1.pdf

1754-KOLNP-2006-CORRESPONDENCE 1.2.pdf

1754-KOLNP-2006-CORRESPONDENCE 1.3.pdf

1754-KOLNP-2006-DESCRIPTION (COMPLETE) 1.1.pdf

1754-KOLNP-2006-DRAWINGS 1.1.pdf

1754-KOLNP-2006-EXAMINATION REPORT.pdf

1754-KOLNP-2006-FORM 1.1.1.pdf

1754-KOLNP-2006-FORM 2.1.1.pdf

1754-KOLNP-2006-FORM 3-1.1.pdf

1754-KOLNP-2006-GRANTED-ABSTRACT.pdf

1754-KOLNP-2006-GRANTED-CLAIMS.pdf

1754-KOLNP-2006-GRANTED-DESCRIPTION (COMPLETE).pdf

1754-KOLNP-2006-GRANTED-DRAWINGS.pdf

1754-KOLNP-2006-GRANTED-FORM 1.pdf

1754-KOLNP-2006-GRANTED-FORM 2.pdf

1754-KOLNP-2006-GRANTED-LETTER PATENT.pdf

1754-KOLNP-2006-GRANTED-SPECIFICATION.pdf

1754-KOLNP-2006-OTHERS.pdf

1754-KOLNP-2006-PETITION UNDER RULE 137.pdf

1754-KOLNP-2006-REPLY TO EXAMINATION REPORT.pdf


Patent Number 248481
Indian Patent Application Number 1754/KOLNP/2006
PG Journal Number 29/2011
Publication Date 22-Jul-2011
Grant Date 19-Jul-2011
Date of Filing 23-Jun-2006
Name of Patentee ULRICH ROHS.
Applicant Address Roonstr. 11, 52351 Duren,
Inventors:
# Inventor's Name Inventor's Address
1 Dr. Ing. Ulrich Rohs. Roonstr. 11, 52351 Duren
2 Tim Barting Achterstrasse 6, 52062 Aachen
3 Werner Brandwitte Der Fubhof 4, 52379 Langerwehe,
4 Christoph Dräger Viehovener Str. 31, 52459 Inden,
PCT International Classification Number F16H29/00
PCT International Application Number PCT/DE04/002647
PCT International Filing date 2004-12-02
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 200410031846.8 2004-03-30 Germany
2 PI0402959.3 2004-07-16 Germany
3 10361542.3 2003-12-23 Germany