GB2227293A - An hydraulic clutch-actuator having a plastics body and associated with a sheet metal clutch release bearing - Google Patents

An hydraulic clutch-actuator having a plastics body and associated with a sheet metal clutch release bearing Download PDF

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Publication number
GB2227293A
GB2227293A GB8928613A GB8928613A GB2227293A GB 2227293 A GB2227293 A GB 2227293A GB 8928613 A GB8928613 A GB 8928613A GB 8928613 A GB8928613 A GB 8928613A GB 2227293 A GB2227293 A GB 2227293A
Authority
GB
United Kingdom
Prior art keywords
actuator
clutch
bearing
sleeve
sheet
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.)
Withdrawn
Application number
GB8928613A
Other versions
GB8928613D0 (en
Inventor
Christoph Puhl
Ferdinand Eckert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHO Holding GmbH and Co KG
Original Assignee
FAG Kugelfischer Georg Schaefer KGaA
Kugelfischer Georg Schaefer and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by FAG Kugelfischer Georg Schaefer KGaA, Kugelfischer Georg Schaefer and Co filed Critical FAG Kugelfischer Georg Schaefer KGaA
Publication of GB8928613D0 publication Critical patent/GB8928613D0/en
Publication of GB2227293A publication Critical patent/GB2227293A/en
Withdrawn legal-status Critical Current

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
    • F16D25/083—Actuators therefor
    • 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
    • F16D25/12—Details not specific to one of the before-mentioned types
    • 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
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
    • F16D23/14—Clutch-actuating sleeves or bearings; Actuating members directly connected to clutch-actuating sleeves or bearings

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)

Abstract

An hydraulic clutch-actuator comprising a clutch bearing (7), a slide sleeve (6) arranged to act on the bearing (7) and also serving as a piston (4), and an actuator casing (1) provided with a pressure-medium inlet (2). The casing (1) comprises a plastics material and includes a tubular chamber (3) for a pressure medium. The slide sleeve (6), which is constructed as a sleeve piston (4) provided with a seal (5), extends into and is axially displaceable in the tubular chamber (3). The slide sleeve (6) carries on its other end portion the clutch bearing (7). The clutch bearing (7) is provided with an outer race (8) formed of sheet-metal, without having been machined. The outer race (8), owing to its being spring-biased in an axial direction, is adjustable in a radial direction, rests against an abutment ring (12) and is surrounded by a sheet-metal cap (9), which makes the clutch bearing (7) a part of the actuator's constructional unit and which is secured to the sleeve (6) by means of a retaining ring (10). <IMAGE>

Description

An hydraulic clutch-actuator The present invention relates to an hydraulic clutch-actuator comprising a clutch bearing, a slide sleeve arranged to act on the bearing and also serving as a piston, and an actuator casing provided with a pressuremedium inlet.
An hydraulically operable clutch-actuator is known from DE-Gm 84 22 401. However, a disadvantage of this construction is that it has a massive structure for both the casing and the bearing, which are cast-steel products necessitating machining. This is difficult and expensive.
A clutch bearing made of sheet metal is also known from DE-Gm 19 75 536. The outer race of this bearing is surrounded by a sheet metal cap simultaneously serving as a slide sleeve. However, no provision is made for adjusting the outer race in a radial direction.
It is an aim of the present invention to provide a low-cost, light and reliable hydraulic clutch-actuator which can be manufactured substantially without having to be machined. The present invention also aims at rendering it possible for the bearing's outer race to be radially adjustable and for the actuator to form, until its installation, a single constructional unit.
Accordingly, the present invention is directed to an actuator having the construction set out in the opening paragraph of the present specification, in which a) the casing comprises a plastics material and includes a tubular chamber for a pressure medium; b) the slide sleeve, which is constructed as a sleeve piston provided with a seal, extends into and is axially displaceable in the tubular chamber; c) the slide sleeve carries on its other end portion the clutch bearing; d) the clutch bearing is provided with an outer race formed of sheet metal, without having been machined;; and e) the outer race, owing to its being spring-biased in an axial direction, is adjustable in a radial direction, rests against an abutment ring and is surrounded by a sheet-metal cap, which makes the clutch bearing a part of the actuator's constructional unit and which is secured to the sleeve by means of a retaining ring.
Advantageously, a bellows and a compression spring may be arranged on the sheet-metal cap and the casing to seal the actuator.
Also advantageously, the actuator may be provided with tape-like means for its protection during transport, the means being arranged so as to be snapped upon a first operation of the actuator.
The combination of a plastics casing, a plastics side sleeve, a sheet-metal bearing and a sheet-metal cap taken in conjunction with the tape-like means for the actuator's protection during transport provide a low cost and light clutch-actuator.
An example of an hydraulic clutch-actuator embodying the present invention is illustrated in the accompanying drawings, in which Figure 1 is an axial sectional view of the actuator; Figure la shows on a larger scale parts enclosed within the circle labelled X in Figure 1; and Figure 2 is a side view of the actuator including means for its protection during transport.
A plastics casing 1 is shown in Figure 1 provided with a pressure-medium inlet 2 and a tubular chamber 3, into which a stepped slide sleeve 6, which is constructed as a sleeve piston 4 provided with a seal 5, extends and is axially displaceable therein. The sleeve 6 carries a clutch bearing 7 on its other end portion, the clutch bearing 7 having an outer race 8 formed of sheet metal, without having been machined. The outer race 8 is surrounded by a sheet-metal cap 9 which makes the bearing 7 a part of the actuator's structural unit and which is secured to the sleeve 6 by means of a retaining ring 10.
A corrugated spring washer 11 is arranged axially between the cap 9 and the outer race 8 and biases the bearing 7 in an axial direction. Owing to this bias, the washer 11 pushes the bearing 7 against an abutment ring 12 joined to the cap 9 with the result that it is adjustable in a radial direction. A compression spring 13 is arranged between the cap 9 and the casing 1 and serves to cushion and to bias the bearing. A bellows 14 is fastened to the cap 9 and the casing 1 to seal the actuator.
As shown in Figure 2, the actuator is held together, until it is installed in a clutch, by tape-like means 15 provided to protect it during transport. The protecting means, which may be, for example, a small plastics tape, will be snapped when the clutch is operated for the first time. As soon as pressure is transmitted from the master cylinder of the clutch through the inlet 2, the pressure in the chamber 3 will also rise, with the result that the sleeve piston 4 will be axially displaced towards the left (viewing the actuator as in Figure 1), will take with it the bearing 7 mounted on the sleeve 6, and will thus push the inner race against the clutch.
When the pressure drops, the bearing and the sleeve piston will be moved back by the clutch spring (not shown) into their original positions.

Claims (4)

Claims
1. An hydraulic clutch-actuator comprising a clutch bearing, a slide sleeve arranged to act on the bearing and also serving as a piston, and an actuator casing provided with a pressure-medium inlet, in which a) the casing comprises a plastics material and includes a tubular chamber for a pressure medium; b) the slide sleeve, which is constructed as a sleeve piston provided with a seal, extends into and is axially displaceable in the tubular chamber; c) the slide sleeve carries on its other end portion the clutch bearing; d) the clutch bearing is provided with an outer race formed of sheet metal, without having been machined; ; and e) the outer race, owing to its being spring-biased in an axial direction, is adjustable in a radial direction, rests against an abutment ring and is surrounded by a sheet-metal cap, which makes the clutch bearing a part of the actuator's constructional unit and which is secured to the sleeve by means of a retaining ring.
2. An hydraulic clutch-actuator according to claim 1, in which a bellows and a compression spring are arranged on the sheet-metal cap and the casing to seal the actuator.
3. An hydraulic clutch-actuator, in which the actuator is provided with tape-like means for its protection during transport, the means being arranged so as to be snapped upon a first operation of the actuator.
4. An hydraulic clutch-actuator substantially as described herein with reference to the accompanying drawings.
GB8928613A 1988-12-22 1989-12-19 An hydraulic clutch-actuator having a plastics body and associated with a sheet metal clutch release bearing Withdrawn GB2227293A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE8815881U DE8815881U1 (en) 1988-12-22 1988-12-22 Hydraulic clutch actuation device

Publications (2)

Publication Number Publication Date
GB8928613D0 GB8928613D0 (en) 1990-02-21
GB2227293A true GB2227293A (en) 1990-07-25

Family

ID=6831028

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8928613A Withdrawn GB2227293A (en) 1988-12-22 1989-12-19 An hydraulic clutch-actuator having a plastics body and associated with a sheet metal clutch release bearing

Country Status (3)

Country Link
DE (1) DE8815881U1 (en)
FR (1) FR2641049B3 (en)
GB (1) GB2227293A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2248095A (en) * 1990-08-06 1992-03-25 Kugelfischer G Schaefer & Co Hydraulic clutch actuation device sealed by a bellows having one rotatable end
DE4412928A1 (en) * 1994-04-15 1995-10-19 Schaeffler Waelzlager Kg Hydraulically actuated device for disengaging a shift clutch of a motor vehicle
DE19746537A1 (en) * 1997-10-22 1999-04-29 Schaeffler Waelzlager Ohg Servo cylinder for hydraulically operated clutch of motor vehicle
CN103758888A (en) * 2014-01-03 2014-04-30 芜湖聚达汽车零部件有限公司 Clutch slave cylinder
US10100880B2 (en) * 2016-01-25 2018-10-16 Valeo Embrayages Release bearing for clutch mechanism

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4100950C2 (en) * 1991-01-15 1998-10-15 Fte Automotive Gmbh Hydraulic clutch actuator
DE4129370C2 (en) * 1991-09-04 2001-11-22 Mannesmann Sachs Ag Hydraulically actuated releaser with support ring and support shoulder
DE4338256C2 (en) * 1992-11-14 2003-12-11 Zf Sachs Ag Motor aid for a hydraulically actuated release device for a drawn friction clutch
FR2730533B1 (en) * 1995-02-09 1997-04-04 Valeo HYDRAULICALLY CONTROLLED CLUTCH STOPPER FOR A DIAPHRAGM CLUTCH OF A MOTOR VEHICLE
FR2738886B1 (en) * 1995-09-14 1997-10-24 Valeo HYDRAULICALLY CONTROLLED RELEASE DEVICE FOR CLUTCH, PARTICULARLY FOR MOTOR VEHICLES
FR2740193A1 (en) * 1995-10-24 1997-04-25 Skf France Hydraulic operating system for clutch in motor vehicle
GB0300514D0 (en) * 2003-01-10 2003-02-12 Automotive Prod France Clutch actuators
DE102017219821A1 (en) 2016-11-14 2018-05-17 Aktiebolaget Skf Clutch release

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2105812A (en) * 1981-09-15 1983-03-30 Luk Lamellen & Kupplungsbau Pressure-medium-operated disengaging device for clutches, especially for motor vehicle clutches
GB2162276A (en) * 1984-07-27 1986-01-29 Fichtel & Sachs Ag Self-centring releaser bearing for a pressed-type friction clutch
GB2219837A (en) * 1988-06-15 1989-12-20 Automotive Products Plc Concentric hydraulic actuator for clutches

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2105812A (en) * 1981-09-15 1983-03-30 Luk Lamellen & Kupplungsbau Pressure-medium-operated disengaging device for clutches, especially for motor vehicle clutches
GB2162276A (en) * 1984-07-27 1986-01-29 Fichtel & Sachs Ag Self-centring releaser bearing for a pressed-type friction clutch
GB2219837A (en) * 1988-06-15 1989-12-20 Automotive Products Plc Concentric hydraulic actuator for clutches

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2248095A (en) * 1990-08-06 1992-03-25 Kugelfischer G Schaefer & Co Hydraulic clutch actuation device sealed by a bellows having one rotatable end
GB2248095B (en) * 1990-08-06 1994-04-06 Kugelfischer G Schaefer & Co Hydraulic coupling actuation device
DE4412928A1 (en) * 1994-04-15 1995-10-19 Schaeffler Waelzlager Kg Hydraulically actuated device for disengaging a shift clutch of a motor vehicle
DE19746537A1 (en) * 1997-10-22 1999-04-29 Schaeffler Waelzlager Ohg Servo cylinder for hydraulically operated clutch of motor vehicle
CN103758888A (en) * 2014-01-03 2014-04-30 芜湖聚达汽车零部件有限公司 Clutch slave cylinder
US10100880B2 (en) * 2016-01-25 2018-10-16 Valeo Embrayages Release bearing for clutch mechanism

Also Published As

Publication number Publication date
FR2641049A3 (en) 1990-06-29
FR2641049B3 (en) 1990-11-23
DE8815881U1 (en) 1989-02-09
GB8928613D0 (en) 1990-02-21

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)