GB2112490A - Hydraulic slave cylinder for a clutch release bearing - Google Patents
Hydraulic slave cylinder for a clutch release bearing Download PDFInfo
- Publication number
- GB2112490A GB2112490A GB08230383A GB8230383A GB2112490A GB 2112490 A GB2112490 A GB 2112490A GB 08230383 A GB08230383 A GB 08230383A GB 8230383 A GB8230383 A GB 8230383A GB 2112490 A GB2112490 A GB 2112490A
- Authority
- GB
- United Kingdom
- Prior art keywords
- slave cylinder
- flange
- abutment members
- hydraulic
- cylinder
- 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
- F16D25/082—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member the line of action of the fluid-actuated members co-inciding with the axis of rotation
- F16D25/087—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member the line of action of the fluid-actuated members co-inciding with the axis of rotation the clutch being actuated by the fluid-actuated member via a diaphragm spring or an equivalent array of levers
-
- 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
- F16D25/082—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member the line of action of the fluid-actuated members co-inciding with the axis of rotation
- F16D25/083—Actuators therefor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
Concentric piston and cylinder components (15 and 16) of a hydraulic slave cylinder used with a clutch release bearing (13) have their axial movement under a biassing spring (22) limited by latch means in the form of flanges (23 and 24). The flanges each have a radial face and a chamfered face, and one flange (24) is radially deformable, being on a slotted cylindrical extension (25). The radially deformable flange (24) allows the cylinder to be rapidly assembled without the need for assembly of a separate retaining device. <IMAGE>
Description
SPECIFICATION
Hydraulic slave cylinder for a clutch release bearing
The invention relates to hydraulic slave cylinder devices of the kind which comprises concentric annular piston and cylinder components which define walls of an annular chamber for receiving hydraulic pressure to move one of said components axially relative to the other, such a slave cylinder being for clutch actuation.
One example of a hydraulic slave cylinder of the kind described is shown in GB. 1 027 925. This specification describes how a clutch release bearing carried by the slave cylinder is lightly loaded against a clutch by hydrostatic pressure. However, it is usual practice to provide a spring to lightly load the bearing onto the clutch, as shown in GB. 1 373479 for example.
When a hydraulic slave clinder of the kind described incorporates a spring which biasses the piston and cylinder components in the same direction as movement induced by hydraulic pressure, it is necessary to incorporate some form of restraining device to keep the components correctly assembled before the clutch and the release bearing and slave cylinder assembly are brought together.
It is an object of the invention to provide a hydraulic slave cylinder of the kind described which incorporates a restraining device which does not inhibit rapid assembly of the piston and cylinder components.
The present invention provides a hydraulic slave cylinder for use with a clutch release bearing and comprising concentric annular piston and cylinder components which define walls of an annular chambey for receiving hydraulic pressure to move one of said components axially relative to the other, spring means acting between respective abutment members carried by said components for biassing said abutment members axially apart in the same direction as movement induced by the hydraulic pressure, and latch means on the abutment members for limiting relative axial movement of the abutment members in the direction induced by the hydraulic pressure whilst allowing relative axial movement of the abutment members in the opposite direction during assembly of the hydraulic slave cylinder.
One embodiment of the invention will now be described with reference to the accompanying drawing which shows a hydraulic slave cylinder according to the invention.
In the drawing there is shown a tubular extension or trumpet 11 which is a gearbox component which normally surrounds the gearbox input shaft. A diaphragm spring clutch (not shown) has diaphragm fingers 12 which are deflected to the left of the drawing, ie. away from the gearbox, for clutch release. A release bearing 13 abuts the fingers 12 and is supported by a flanged collar 14 in a manner which provides controlled radial movement of the bearing as described in GB. 2006 377A. The collar 14 is axially slidable on the trumpet 11 and is arranged for abutment with an annular piston component 15.
With a cylinder component 16, the piston component 15 defines walls of an annular chamber 17 which can receive hydraulic pressure through an inlet port 18 positioned similarly to a bleed port 20.
The annular chamber 17 is also bounded by a pressed liner 19 which has a radial flange for abutment with the trumpet 11 and an axial rim which is spigotted into the cylinder component 16, sealed with an 'O' ring and retained by peening. A doublelip seal 21 is provided for the piston component 15.
In order to maintain a light preload of the release bearing 13 on the diaphragm spring fingers 12, spring means in the form of a helical compression spring 22 acts between a first abutment member provided by the outer portion of the flange of collar 14 and a second abutment member provided by a similar flange portion of cylinder component 16.
Thus the spring 22 acts to bias the abutment members in the direction induced by hydraulic pressure in the annular chamber 17.
In order to limit axial movement of the collar 14 relative to the cylinder component 16, particularly for use when the gearbox and clutch are separated, latch means are provided in the form of a flange 23 which extends radially outwardly from the cylinder component 16 and a radially deformable flange 24 extending radially inwardly from a cylindrical extension 25 which projects axially from the collar 14 and is tapered towards the flange 24. Flanges 23 and 24 each have one radial face and one chamfered face.
The cylindrical extension 25 and flange 24 are slotted axially to form fingers which are resilient by virture of their of cross-section and the characteristics of the material of the collar 14.
In the example shown, the material is preferably glass-filled nylon. The chamfers allow the flanges 23 and 24 to slide one over the other during assembly, the flange 24 on the extension 25 being temporarily deflectedx radially outwards. After assembly of the cylinder, the radial faces abut to resist the load of the spring 22.
The radially deformable flange 24 obviates a need for assembling a separate retaining device such as a collar retained by peening or a circlip or snap ring.
The spring 22 provides resistance against rotation of the collar 14 relative to the cylinder component 16 in the normal direction of rotation of the clutch, for example if the bearing 13 is unduly stiff. The collar 14 includes a tubular spigot section 26 which forms the base of the fingers 25 and the spring is a close diametral fit on the spigot section such that any tendency towards rotation is resisted by an increase in the radial force exerted by the spring. Thus the helix of the spring 22 is arranged so that it tends to tighten onto the spigot section 26. The spring 22 is provided at its other end with a tab 27 which engages a lug 28 formed integrally with the cylinder component 16 and which resists rotation of the spring. Buttress portions 29 on the cylinder component 16 provide radial location for the spring 22.
Alternatively an array of lugs 28 may be provided.
The release bearing 13 is spigotted onto a pressed annular flange 31. This is retained by a viscous adhesive as described in GB. 2 006 377 A and additionally by spring clips 32 which include foldedover tab sections which extend into slots in the spigot section 26 and are retained by the end coil of spring 22.
Claims (5)
1. A hydraulic slave cylinder for use with a clutch release bearing and comprising concentric annular piston and cylinder components which define walls of an annular chamber for receiving hydraulic pressurn to move one of said components axially relative to the other, spring means acting between respective abutment members carried by said components for biassing said abutment members axially apart in the same direction as movement induced by the hydraulic pressure, and latch means on the abutment members for limiting relative axial movement of the abutment members in the direction induced by the hydraulic pressure whilst allowing relative axial movement of the abutment members in the opposite direction during assembly of the hydraulic slave cylinder.
2. A slave cylinder according to Claim 1, wherein the latch means comprises a flange on each of said abutment members, the flanges extending in opposite radial directions and one of the flanges being radially deformable.
3. A slave cylinder according to Claim 2, wherein said one flange is provided on a cylindrical extension of the respective abutment member said one flange and the cylindrical extension being slotted axially to form resilient fingers.
4. A slave cylinder according to Claim 2 or Claim 3, wherein each flange has a radial face and a chamfered face, the chamfered faces abutting during assembly of the cylinder and the radial faces abutting after assembly to resist the load of the spring.
5. A hydraulic slave cylinder substantially as described with reference to the accompanying drawing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08230383A GB2112490B (en) | 1981-12-15 | 1982-10-25 | Hydraulic slave cylinder for a clutch release bearing |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8137793 | 1981-12-15 | ||
GB08230383A GB2112490B (en) | 1981-12-15 | 1982-10-25 | Hydraulic slave cylinder for a clutch release bearing |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2112490A true GB2112490A (en) | 1983-07-20 |
GB2112490B GB2112490B (en) | 1985-07-03 |
Family
ID=26281546
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08230383A Expired GB2112490B (en) | 1981-12-15 | 1982-10-25 | Hydraulic slave cylinder for a clutch release bearing |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2112490B (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0119784A1 (en) * | 1983-03-21 | 1984-09-26 | Automotive Products Public Limited Company | An actuator for a motor vehicle clutch control mechanism |
FR2544430A1 (en) * | 1983-04-15 | 1984-10-19 | Skf Kugellagerfabriken Gmbh | HYDRAULIC ACTUATING DEVICE FOR CLUTCH, ESPECIALLY FOR AUTOMOTIVE VEHICLES |
GB2142999A (en) * | 1983-03-21 | 1985-01-30 | Automotive Products Plc | An actuator for a motor vehicle clutch release bearing |
EP0168932A1 (en) * | 1984-06-13 | 1986-01-22 | LUCAS INDUSTRIES public limited company | Hydraulic slave cylinder |
EP0177212A1 (en) * | 1984-09-20 | 1986-04-09 | Automotive Products Public Limited Company | An actuator for a motor vehicle clutch |
FR2576989A1 (en) * | 1985-02-07 | 1986-08-08 | Fichtel & Sachs Ag | CLUTCH DEVICE FOR A DOUBLE FRICTION CLUTCH |
EP0194773A1 (en) * | 1985-03-07 | 1986-09-17 | Automotive Products Public Limited Company | Hydraulic control apparatus having an installation restraining strap |
FR2581146A1 (en) * | 1985-04-24 | 1986-10-31 | Dana Corp | CLUTCH THRUST BEARING. |
FR2611838A1 (en) * | 1987-03-06 | 1988-09-09 | Fraymon Sa | HYDRAULICALLY CONTROLLED CLUTCH ACTUATING DEVICE |
WO1990001123A1 (en) * | 1988-07-21 | 1990-02-08 | Luigi Rinaldo Cimarosti | Clutch control device |
EP0433466A1 (en) * | 1989-07-04 | 1991-06-26 | Kabushiki Kaisha Kubota | Clutch operating device of vehicle |
EP0504906A1 (en) * | 1991-03-20 | 1992-09-23 | Fichtel & Sachs AG | Slave cylinder of a hydraulic actuation device for a vehicle friction clutch |
GB2259555A (en) * | 1991-09-13 | 1993-03-17 | Fichtel & Sachs Ag | Fluid-actuable releaser for a friction clutch |
DE19635101A1 (en) * | 1995-09-14 | 1997-03-20 | Valeo | Hydraulic release bearing for diaphragm spring clutch for motor vehicle |
DE19716217A1 (en) * | 1997-04-18 | 1998-10-22 | Schaeffler Waelzlager Ohg | Automotive hydraulic clutch disengagement unit |
DE19944083A1 (en) * | 1999-09-15 | 2001-04-12 | Fte Automotive Gmbh | Central release for hydraulic clutch actuation |
WO2003056202A1 (en) * | 2001-12-22 | 2003-07-10 | Automotive Products (Usa) Inc. | Clutch actuators |
WO2018095467A1 (en) * | 2016-11-28 | 2018-05-31 | Schaeffler Technologies AG & Co. KG | Slave cylinder |
WO2020038524A1 (en) * | 2018-08-23 | 2020-02-27 | Schaeffler Technologies AG & Co. KG | Slave cylinder having venting on the housing |
-
1982
- 1982-10-25 GB GB08230383A patent/GB2112490B/en not_active Expired
Cited By (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0119784A1 (en) * | 1983-03-21 | 1984-09-26 | Automotive Products Public Limited Company | An actuator for a motor vehicle clutch control mechanism |
GB2142999A (en) * | 1983-03-21 | 1985-01-30 | Automotive Products Plc | An actuator for a motor vehicle clutch release bearing |
FR2544430A1 (en) * | 1983-04-15 | 1984-10-19 | Skf Kugellagerfabriken Gmbh | HYDRAULIC ACTUATING DEVICE FOR CLUTCH, ESPECIALLY FOR AUTOMOTIVE VEHICLES |
EP0168932A1 (en) * | 1984-06-13 | 1986-01-22 | LUCAS INDUSTRIES public limited company | Hydraulic slave cylinder |
EP0177212A1 (en) * | 1984-09-20 | 1986-04-09 | Automotive Products Public Limited Company | An actuator for a motor vehicle clutch |
FR2576989A1 (en) * | 1985-02-07 | 1986-08-08 | Fichtel & Sachs Ag | CLUTCH DEVICE FOR A DOUBLE FRICTION CLUTCH |
EP0194773A1 (en) * | 1985-03-07 | 1986-09-17 | Automotive Products Public Limited Company | Hydraulic control apparatus having an installation restraining strap |
FR2581146A1 (en) * | 1985-04-24 | 1986-10-31 | Dana Corp | CLUTCH THRUST BEARING. |
FR2611838A1 (en) * | 1987-03-06 | 1988-09-09 | Fraymon Sa | HYDRAULICALLY CONTROLLED CLUTCH ACTUATING DEVICE |
US4869355A (en) * | 1987-03-06 | 1989-09-26 | Valeo | Hydraulically controlled clutch actuation device |
WO1990001123A1 (en) * | 1988-07-21 | 1990-02-08 | Luigi Rinaldo Cimarosti | Clutch control device |
US5062515A (en) * | 1988-07-21 | 1991-11-05 | Cimarosti Luigi R | Clutch control device |
EP0433466A1 (en) * | 1989-07-04 | 1991-06-26 | Kabushiki Kaisha Kubota | Clutch operating device of vehicle |
EP0433466A4 (en) * | 1989-07-04 | 1991-12-04 | Kabushiki Kaishakubota | Clutch operating device of vehicle |
EP0504906A1 (en) * | 1991-03-20 | 1992-09-23 | Fichtel & Sachs AG | Slave cylinder of a hydraulic actuation device for a vehicle friction clutch |
US5211099A (en) * | 1991-03-20 | 1993-05-18 | Fichtel & Sachs Ag | Slave cylinder for a hydraulic actuating system of a motor vehicle friction clutch |
FR2681393A1 (en) * | 1991-09-13 | 1993-03-19 | Fichtel & Sachs Ag | HYDRAULICALLY CONTROLLED CLUTCH DEVICE FOR A FRICTION CLUTCH. |
US5307915A (en) * | 1991-09-13 | 1994-05-03 | Fichtel & Sachs Ag | Fluid-actuable releaser for a friction clutch |
GB2259555B (en) * | 1991-09-13 | 1995-10-04 | Fichtel & Sachs Ag | Fluid-actuable releaser for a friction clutch |
DE4130525C2 (en) * | 1991-09-13 | 2000-05-18 | Mannesmann Sachs Ag | Fluid actuated release system |
GB2259555A (en) * | 1991-09-13 | 1993-03-17 | Fichtel & Sachs Ag | Fluid-actuable releaser for a friction clutch |
DE19635101B4 (en) * | 1995-09-14 | 2006-02-09 | Valeo | Release bearing with hydraulic actuation for a diaphragm spring clutch for motor vehicles |
DE19635101A1 (en) * | 1995-09-14 | 1997-03-20 | Valeo | Hydraulic release bearing for diaphragm spring clutch for motor vehicle |
DE19716217A1 (en) * | 1997-04-18 | 1998-10-22 | Schaeffler Waelzlager Ohg | Automotive hydraulic clutch disengagement unit |
DE19944083A1 (en) * | 1999-09-15 | 2001-04-12 | Fte Automotive Gmbh | Central release for hydraulic clutch actuation |
US6390267B1 (en) | 1999-09-15 | 2002-05-21 | Fte Automotive Gmbh | Central release device for a hydraulic clutch actuation system |
WO2003056202A1 (en) * | 2001-12-22 | 2003-07-10 | Automotive Products (Usa) Inc. | Clutch actuators |
WO2018095467A1 (en) * | 2016-11-28 | 2018-05-31 | Schaeffler Technologies AG & Co. KG | Slave cylinder |
WO2020038524A1 (en) * | 2018-08-23 | 2020-02-27 | Schaeffler Technologies AG & Co. KG | Slave cylinder having venting on the housing |
CN112639322A (en) * | 2018-08-23 | 2021-04-09 | 舍弗勒技术股份两合公司 | Slave cylinder with exhaust on housing |
CN112639322B (en) * | 2018-08-23 | 2022-10-25 | 舍弗勒技术股份两合公司 | Slave cylinder with exhaust on housing |
Also Published As
Publication number | Publication date |
---|---|
GB2112490B (en) | 1985-07-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 20021024 |
|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |