GB2310021A - A reduced length clutch operating device having at least three circumferentially separated hydraulic subunits - Google Patents
A reduced length clutch operating device having at least three circumferentially separated hydraulic subunits Download PDFInfo
- Publication number
- GB2310021A GB2310021A GB9702186A GB9702186A GB2310021A GB 2310021 A GB2310021 A GB 2310021A GB 9702186 A GB9702186 A GB 9702186A GB 9702186 A GB9702186 A GB 9702186A GB 2310021 A GB2310021 A GB 2310021A
- Authority
- GB
- United Kingdom
- Prior art keywords
- subunits
- operating device
- clutch operating
- release bearing
- finger extensions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
- F16D25/088—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member the line of action of the fluid-actuated members being distinctly separate from the axis of rotation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Description
2310021 CLUTCH OPERATING DEVICE The invention relates to a clutch
operating device for a gear unit, comprising a release bearing surrounding a shaft and axially movable by means of a piston-and-cylinder =it which can be supplied with a fluid medium and is statically mounted, guide means being provided to suppress radially directed deflection movements of the release bearing.
A clutch operating device of this kind is known from DE 4001607. In this case the piston-and-cylinder unit is annular in shape and coordinated in close proximity with the surface of the shaft. The structural shape is therefore complicated. In addition, it takes up considerable space in the axial direction, inasmuch as the release bearing, the piston- andcylinder unit and the guide means are arranged one following the other in the axial direction.
It is an object of the invention to further develop clutch operating device of the abovementioned type in such manner that less space is required in the axial direction, while its manufacture is simplified.
This object is achieved, according to the invention, by a clutch operating device of the type initially mentioned, wherein the piston - and- cylinder unit comprises at least three subunits which are uniformly spaced apart circumferentially around the shaft, and the guide means are arranged in the gaps formed by the circumferential spacing between the subunits. Consequently, the piston-andcylinder units contained in the subunits no longer need to be annular in shape, so that their manufacture is substantially simplified. They are arranged at a radial distance from the shaft, so that it is possible to dispose the guide means and/or the release bearing in a position which is at least partly overlapped in the axial direction by the subunits. The space required in the axial direction is thus substantially reduced.
The subunits are grouped together in a casing and have a stationary mounting, so that they can easily be supplied with a fluid medium under pressure, for example a 5 hydraulic liquid or a gas.
The guide means may be formed by first finger extensions of a component comprising the subunits, raid finger extensions projecting parallel to the longitudinal direction of the shaft, and surrounding the release bearing in the region of an outer boundary surface. The release bearing is generally formed by a grooved ball bearing. Its purpose is to transmit to the clutch the axially directed operating forces of the subunits. Its arrangement in a position overlapping the first finger extensions in the axial direction gives rise to a reduction of axial structural length.
The outer boundary surface may also form a component of a support ring in which the release bearing is received. The resulting saving of space corresponds to that discussed above. In addition, the further advantage is gained that the release bearing may correspond to any standard construction. This is of great advantage in the procurement of spare parts.
The springs or resiliently mounted release elements distributed in the circumferential direction in a clutch do not normally have completely identical resilience. This results in a rotational tilting moment on the release bearing. In order to prevent frictional forces, increased because of this tilting moment, from impeding the axial movement of the release bearing in the operation of the clutch, or even causing self-locking, it has been found advantageous for the boundary surface to be spherically formed, at least in the subregions in contact with the first finger extensions. The release bearing held therein can - 3 thus adapt to the variations in resilience of the springs in the circumferential direction and follow the yielding spring ends such that the loading of the release bearing is balanced in the circumferential direction at all points on the circumference. This is of great advantage for obtaining improved durability of the release bearing.
The wobbling movement of the release bearing as the result of this rotational tilting moment is connected with continuous shifting of fluid between the individual piston- and- cylinder units. so that with small connection cross-sections between the pie ton-and- cylinder units good damping of this wobbling movement is achieved.
On the support ring second finger extensions can be provided, these extending outwards in the radial direction and being in engagement with the subunits. The diameter of the release bearing can be reduced accordingly, so that production costs are lowered.
The structural length is still further shortened if the second finger extensions are provided at that end of the ring which is remote from the subunits and if operating means contained in the subunits overlap the support ring as far as the second finger extensions.
The present invention will now be described in more detail, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 shows a clutch in longitudinal section containing a clutch operating device according to an embodiment of the invention; and Figure 2 shows a front view of the clutch operating device shown in Figure 1.
The clutch operating device shown in Figures 1 and 2 is intended for a gear unit which forms a component of the drive train of a motor vehicle. The clutch operating device comprises a release bearing 1 surrounding a shaft 2 and axially movable by means of a piston- and- cylinder unit which is supplied with a fluid medium, is statically mounted and which comprises three subunits 3 uniformly spaced apart circumferentially around the shaft 2. Guide means are provided in the gaps, formed by the circumferential spacing, between the subunits 3. The guide means are f ormed by f irst finger extensions 6 of a component comprising the subunits 3, said f inger extensions projecting parallel to the longitudinal direction of the shaft 2, and surrounding the release bearing 1 in the region of an outer boundary surface 5. The latter forms a component of a support ring 7 in which the release bearing 1 is received. The boundary surface 5 is spherically formed in the region in contact with the first finger extensions 6. The support ring 7, including the release bearing 1 contained in it, is thus able to follow, by a wobbling movement, the resilience, likewise varying in the circumferential direction, of the release elements 10 of the clutch when the latter is set in rotational motion. Even in the event of unfavourable conditions, complete balancing, in the circumferential direction, of the loading of the release bearing 1 in the axial direction is thereby ensured. In comparison with known structural forms, the diameter of the release bearing can be markedly reduced by this means.
Provided on the support ring 7 are second f inger extensions 8, these extending outwards in the radial direction and being in engagement with the subunits 3. Owing to the fact that the second f inger extensions 8 are provided at that end of the support ring 7 which is remote from the subunits 3 and that operating means 9 contained in the subunits 3 overlap the support ring 7 as far as the second finger extensions, a further reduction of the structural length required in the axial direction is achieved. The operating means 9 of the subunits 3 are formed by pistons in the exemplary embodiment illustrated. These pistons are mounted on compression springs in the respective cylinders. Wear on the clutch disc resulting from operation is thus automatically taken up without readjustment of the clutch being required.
Claims (7)
1. A clutch operating device for a gear unit, comprising a release bearing surrounding a shaft and axially movable by means of a piston- andcylinder unit which can be supplied with a fluid medium and is statically mounted, guide means being provided to suppress radially directed deflection movements of the release bearing, wherein the pistonand-cylinder unit comprises at least three subunits which are uniformly spaced apart circumferentially around the shaft, and the guide means are arranged in the gaps formed by the circumferential spacing between the subunits.
2. A clutch operating device according to claim 1, wherein the guide means are formed by first finger extensions of a component comprising the subunits, said finger extensions projecting parallel to the longitudinal direction of the shaft and surrounding the release bearing in the region of an outer boundary surface.
3. A clutch operating device according to claim 2, wherein the boundary surface forms a component of a support ring in which the release bearing is received.
4. A clutch operating device according to either of claims 2 or 3, wherein the boundary surface is spherically formed, at least in the region in contact with the first finger extensions.
5. A clutch operating device according to claim 3 or claim 4 when dependent thereupon, wherein on the support ring second finger extensions are provided, these extending outwards in the radial direction and being in engagement with the subunits.
6. A clutch operating device according to claim 5, wherein the second finger extensions are provided at that end of the support ring which is remote from the subunits, and operating means contained in the subunits overlap the support ring as far as the second finger extensions.
7. A clutch operating device for a gear unit, substantially as described herein with reference to the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19604159A DE19604159C2 (en) | 1996-02-06 | 1996-02-06 | Clutch actuator |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9702186D0 GB9702186D0 (en) | 1997-03-26 |
GB2310021A true GB2310021A (en) | 1997-08-13 |
GB2310021B GB2310021B (en) | 1997-12-24 |
Family
ID=7784584
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9702186A Expired - Fee Related GB2310021B (en) | 1996-02-06 | 1997-02-03 | Clutch operating device |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE19604159C2 (en) |
FR (1) | FR2744504B1 (en) |
GB (1) | GB2310021B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6443287B2 (en) | 1998-11-02 | 2002-09-03 | Kongsberg Automotive Asa | Clutch |
WO2010149127A1 (en) * | 2009-06-22 | 2010-12-29 | Schaeffler Technologies Gmbh & Co. Kg | Engaging/disengaging device for transmitting a piston force to at least one clutch |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19945231A1 (en) * | 1999-09-21 | 2001-05-03 | Bosch Gmbh Robert | Clutch between drive engine and gear box in motor vehicles has hydraulic fluid supply integrated in stationary clutch housing |
DE10308771B4 (en) | 2003-02-28 | 2005-07-14 | Dr.Ing.H.C. F. Porsche Ag | Friction clutch for a drive unit of a motor vehicle |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1089624A (en) * | 1965-10-01 | 1967-11-01 | Ford Motor Co | Clutch assemblies for motor vehicles |
GB2083884A (en) * | 1980-09-16 | 1982-03-31 | Gen Motors Corp | Hydraulic actuator for operating release bearing of friction clutch |
EP0497164A1 (en) * | 1991-02-01 | 1992-08-05 | Rms Engineering, Inc. | Fluid pressure actuated actuator mechanism for clutches and the like |
WO1996030667A1 (en) * | 1995-03-31 | 1996-10-03 | Horton Industrial Products, Inc. | Rotary clutch |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2216856A5 (en) * | 1973-02-02 | 1974-08-30 | Ferodo Sa | |
DE3326119C1 (en) * | 1983-07-20 | 1985-03-14 | Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt | Hydraulically actuated device for clutches |
US4960193A (en) * | 1989-01-27 | 1990-10-02 | Ina Bearing Company, Inc. | Concentric slave cylinder |
US4991702A (en) * | 1989-02-15 | 1991-02-12 | Ladin Eli M | Motor vehicle clutch control with co-acting multiple actuators mounted apart from the axis of a clutch |
DE4141810C2 (en) * | 1991-12-18 | 1998-12-24 | Bayerische Motoren Werke Ag | Hydraulically actuated release device for a friction clutch |
DE4414684C2 (en) * | 1994-04-27 | 1997-04-17 | Fichtel & Sachs Ag | Hydraulic device with a plurality of cylinders |
-
1996
- 1996-02-06 DE DE19604159A patent/DE19604159C2/en not_active Expired - Fee Related
-
1997
- 1997-02-03 GB GB9702186A patent/GB2310021B/en not_active Expired - Fee Related
- 1997-02-04 FR FR9701385A patent/FR2744504B1/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1089624A (en) * | 1965-10-01 | 1967-11-01 | Ford Motor Co | Clutch assemblies for motor vehicles |
GB2083884A (en) * | 1980-09-16 | 1982-03-31 | Gen Motors Corp | Hydraulic actuator for operating release bearing of friction clutch |
EP0497164A1 (en) * | 1991-02-01 | 1992-08-05 | Rms Engineering, Inc. | Fluid pressure actuated actuator mechanism for clutches and the like |
WO1996030667A1 (en) * | 1995-03-31 | 1996-10-03 | Horton Industrial Products, Inc. | Rotary clutch |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6443287B2 (en) | 1998-11-02 | 2002-09-03 | Kongsberg Automotive Asa | Clutch |
WO2010149127A1 (en) * | 2009-06-22 | 2010-12-29 | Schaeffler Technologies Gmbh & Co. Kg | Engaging/disengaging device for transmitting a piston force to at least one clutch |
Also Published As
Publication number | Publication date |
---|---|
GB9702186D0 (en) | 1997-03-26 |
GB2310021B (en) | 1997-12-24 |
DE19604159C2 (en) | 1998-04-09 |
FR2744504A1 (en) | 1997-08-08 |
DE19604159A1 (en) | 1997-08-14 |
FR2744504B1 (en) | 2001-09-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20040203 |