GB2248095A - Hydraulic clutch actuation device sealed by a bellows having one rotatable end - Google Patents

Hydraulic clutch actuation device sealed by a bellows having one rotatable end Download PDF

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Publication number
GB2248095A
GB2248095A GB9116849A GB9116849A GB2248095A GB 2248095 A GB2248095 A GB 2248095A GB 9116849 A GB9116849 A GB 9116849A GB 9116849 A GB9116849 A GB 9116849A GB 2248095 A GB2248095 A GB 2248095A
Authority
GB
United Kingdom
Prior art keywords
housing
bellows
bearing
actuation device
seat
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
Application number
GB9116849A
Other versions
GB9116849D0 (en
GB2248095B (en
Inventor
Ronald Luehrs
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 GB9116849D0 publication Critical patent/GB9116849D0/en
Publication of GB2248095A publication Critical patent/GB2248095A/en
Application granted granted Critical
Publication of GB2248095B publication Critical patent/GB2248095B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/08—Details or arrangements of sealings not provided for in group F16D3/84

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Sealing (AREA)

Abstract

An hydraulic clutch actuation device comprising a clutch release bearing (6), an hydraulically operable displacement sleeve acting hydraulically thereon, a housing (1) containing a pressure medium input and a pressure cavity (3), a compression spring (7) arranged between the clutch release bearing (6) and the housing (1), which prestresses the bearing (6). and a bellows (8) arranged on the bearing housing (6) and on the housing (1) which contains the pressure cavity (3), which bellows seals the coupling actuation device. The bellows (8) is constructed so as to be circumferentially rotatable at its seat on the housing (1) which contains the pressure cavity (3) and/or on the bearing housing (6). The bellows preferably has a slidable ring (a) mounted on a seat in the housing, or alternatively the bellows may be coated at the seat with a low friction material. <IMAGE>

Description

Hydraulic coupling actuation device The present invention relates to an hydraulic coupling actuation device comprising a coupling bearing, an hydraulically operable displacement sleeve acting hydraulically thereon, a housing containing a pressure medium input and a pressure cavity, a compression spring arranged between the coupling bearing and housing, which prestresses the bearing, and a bellows arranged on the bearing housing and on the housing which contains the pressure cavity, which bellows seals the coupling actuation device.
Such a coupling actuation device was proposed in DE GM 88 15 881, and has proved successful in practice.
It has been found that isolated damage to the bellows can occur. Through the inner frictional moment of the bearing, a resulting force occurs in a circumferential direction. This force is supported via the compression spring which is used simultaneously as a pre-load spring, on the housing. During this process, the bearing housing twists with the piston as well as the protection cap which is connected in a friction-locking manner with the bearing housing, with respect to the housing, which leads to a torsion of the bellows. This construction causes a reduction in the usable life of the bellows especially when it is jammed between the spring windings.
It is therefore an aim of the present invention to develop a coupling actuation device having a construction as set out in the opening paragraph of the present specification in such a way that the said disadvantages are avoided and loading of the bellows in a circumferential direction is reduced by simple means.
Accordingly the present invention is directed to an hydraulic coupling actuation device as described in the opening paragraph of the present specification in which the bellows is constructed so as to be circumferentially rotatable at its seat on the housing which contains the pressure cavity and/or on the bearing housing.
Preferably the bellows has a sliding ring on at least one seat.
Advantageously the bellows is provided with a low-friction coating on its seats.
An example of an hydraulic coupling actuation device made in accordance with the present invention is shown in the accompanying drawings, in which; Figure 1 shows an axial sectional view of such a coupling actuation device; and Figure 2 shows an enlarged cross-section of a part of the device illustrated in Figure 1.
A housing 1 is illustrated in Figure 1. It has a connection 2 for receiving a supply of pressure medium, which leads into a pressure cavity 3. Therein a piston 5, provided with a seal 4 is arranged so as to be axially displaceable. The piston is equipped with a coupling bearing 6 at its other end. A compression spring 7 is arranged between the coupling bearing 6 and the housing 1. The spring 7 prestresses the bearing 6. A bellows 8 is attached to the bearing 6 and the housing 1 on their outside and seals the coupling actuation device against dirt. The bellows 8 is connected firmly with the bearing housing 6 whilst it is provided with a slidable ring 9 engaged in a seat on the housing 1 in such a manner that it can rotate about the axis of the device.
As illustrated in Figure 2, the slidable ring 9 is arranged radially and axially with play between the housing 1 and a spring support surface 10, so that the bellows 8 can follow a rotation of the bearing outer ring with respect to the housing.
Numerous modifications and variations in the illustrated hydraulic coupling actuation device may readily occur to the reader without taking it outside the scope of the present invention. Thus for example instead of a slidable ring, the bellows 8 may also be provided with a low-friction coating on its seat.

Claims (4)

Claims
1. An hydraulic coupling actuation device comprising a coupling bearing, an hydraulically operable displacement sleeve acting hydraulically thereon, a housing containing a pressure medium input and a pressure cavity, a compression spring arranged between the coupling bearing and housing, which prestresses the bearing, and a bellows arranged on the bearing housing and on the housing which contains the pressure cavity, which bellows seals the coupling actuation device, in which the bellows is constructed so as to be circumferentially rotatable at its seat on the housing which contains the pressure cavity and/or on the bearing housing.
2. An hydraulic coupling actuation device according to claim 1, in which the bellows has a slidable ring on at least one seat.
3. An hydraulic coupling actuation device according to claim 1, in which the bellows is provided with a lowfriction coating on its seats.
4. An hydraulic coupling actuation device, substantially as described herein with reference to and as shown in the accompanying drawings.
GB9116849A 1990-08-06 1991-08-05 Hydraulic coupling actuation device Expired - Fee Related GB2248095B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE9011432U DE9011432U1 (en) 1990-08-06 1990-08-06

Publications (3)

Publication Number Publication Date
GB9116849D0 GB9116849D0 (en) 1991-09-18
GB2248095A true GB2248095A (en) 1992-03-25
GB2248095B GB2248095B (en) 1994-04-06

Family

ID=6856232

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9116849A Expired - Fee Related GB2248095B (en) 1990-08-06 1991-08-05 Hydraulic coupling actuation device

Country Status (2)

Country Link
DE (1) DE9011432U1 (en)
GB (1) GB2248095B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4412928A1 (en) * 1994-04-15 1995-10-19 Schaeffler Waelzlager Kg Hydraulically actuated device for disengaging a shift clutch of a motor vehicle
FR2755493A1 (en) * 1996-11-05 1998-05-07 Inst Francais Du Petrole Rotary shaft seal for rotary ovens or filters
GB2320067A (en) * 1996-12-09 1998-06-10 Courtaulds Fibres Pump seals
WO2015019168A3 (en) * 2013-08-09 2015-07-16 Toyota Jidosha Kabushiki Kaisha Clutch release mechanism

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0628358U (en) * 1992-09-18 1994-04-15 株式会社大金製作所 Hydraulic cylinder device for clutch release
FR2730533B1 (en) * 1995-02-09 1997-04-04 Valeo HYDRAULICALLY CONTROLLED CLUTCH STOPPER FOR A DIAPHRAGM CLUTCH OF A MOTOR VEHICLE
DE19523011A1 (en) * 1995-06-24 1997-01-02 Schaeffler Waelzlager Kg Hydraulic release device for a friction clutch
DE19755496B4 (en) * 1997-12-13 2006-10-12 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Support ring for the preload spring of a slave cylinder
DE19755772A1 (en) * 1997-12-16 1999-06-17 Schaeffler Waelzlager Ohg Hydraulic clutch and brake operating system
DE19849892A1 (en) * 1998-10-29 2000-05-04 Schaeffler Waelzlager Ohg Sealing element for a release bearing
DE10011131C1 (en) * 2000-03-10 2001-12-20 Daimler Chrysler Ag Central clutch operator, for automobile hydraulic clutch, has bellows between clutch operator housing and movable piston enclosing sealed intermediate space filled with gas volume

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1480039A (en) * 1974-12-19 1977-07-20 Citroen Sa Universal joints
GB2227293A (en) * 1988-12-22 1990-07-25 Kugelfischer G Schaefer & Co An hydraulic clutch-actuator having a plastics body and associated with a sheet metal clutch release bearing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1480039A (en) * 1974-12-19 1977-07-20 Citroen Sa Universal joints
GB2227293A (en) * 1988-12-22 1990-07-25 Kugelfischer G Schaefer & Co An hydraulic clutch-actuator having a plastics body and associated with a sheet metal clutch release bearing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4412928A1 (en) * 1994-04-15 1995-10-19 Schaeffler Waelzlager Kg Hydraulically actuated device for disengaging a shift clutch of a motor vehicle
FR2755493A1 (en) * 1996-11-05 1998-05-07 Inst Francais Du Petrole Rotary shaft seal for rotary ovens or filters
GB2320067A (en) * 1996-12-09 1998-06-10 Courtaulds Fibres Pump seals
WO2015019168A3 (en) * 2013-08-09 2015-07-16 Toyota Jidosha Kabushiki Kaisha Clutch release mechanism

Also Published As

Publication number Publication date
GB9116849D0 (en) 1991-09-18
GB2248095B (en) 1994-04-06
DE9011432U1 (en) 1990-10-11

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20030805