GB2302926A - Feed connection device for a fluid pressure system and a hydraulic cylinder for controlling a clutch provided with such a device - Google Patents

Feed connection device for a fluid pressure system and a hydraulic cylinder for controlling a clutch provided with such a device Download PDF

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Publication number
GB2302926A
GB2302926A GB9613130A GB9613130A GB2302926A GB 2302926 A GB2302926 A GB 2302926A GB 9613130 A GB9613130 A GB 9613130A GB 9613130 A GB9613130 A GB 9613130A GB 2302926 A GB2302926 A GB 2302926A
Authority
GB
United Kingdom
Prior art keywords
coupling
feed inlet
pin
engaged
transversely
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
GB9613130A
Other versions
GB2302926B (en
GB9613130D0 (en
Inventor
Frederic Rey
Veve Roland Randriazanamparany
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.)
Valeo SE
Original Assignee
Valeo SE
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 Valeo SE filed Critical Valeo SE
Publication of GB9613130D0 publication Critical patent/GB9613130D0/en
Publication of GB2302926A publication Critical patent/GB2302926A/en
Application granted granted Critical
Publication of GB2302926B publication Critical patent/GB2302926B/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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/12—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls or other movable or insertable locking members
    • F16L37/14—Joints secured by inserting between mating surfaces an element, e.g. a piece of wire, a pin, a chain
    • F16L37/142—Joints secured by inserting between mating surfaces an element, e.g. a piece of wire, a pin, a chain where the securing element is inserted tangentially
    • F16L37/144—Joints secured by inserting between mating surfaces an element, e.g. a piece of wire, a pin, a chain where the securing element is inserted tangentially the securing element being U-shaped
    • 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
    • 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
    • F16D25/00—Fluid-actuated clutches
    • F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
    • F16D2025/081—Hydraulic devices that initiate movement of pistons in slave cylinders for actuating clutches, i.e. master cylinders

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Description

1 1 2302926 1 The invention concerns a feed connection device for a fluid
pressure system.
The invention concerns more particularly a feed connection device for a fluid pressure system of the type in which a coupling has, at the front, a head designed to be received axially in a feed inlet body connected to a receiver device and, at the rear, a connecting piece designed for fixing the coupling at the end of a feed pipe, of the type in which the coupling is able to be held in position engaged axially inside the feed inlet by a pin with two legs forming a U which is engaged transversely in the body of the feed inlet so as to cooperate with a radial annular groove arranged in the external cylindrical surface of the coupling, of the type in which a vent orifice for the receiver device is provided, and of the type in which a sealing joint is arranged between the head of the coupling and the feed inlet.
The use of couplings of this type, also referred to as plug-in couplings, is known for effecting simply and economically the connection of a feed pipe to the inlet of a receiver device.
In all cases, it is necessary to provide a device for venting the receiver device which makes it possible to drive from the receiver device any fluid which would impair the correct functioning of the device.
In the case of a hydraulic system, the vent makes it possible notably to empty the receiver device of any air which may be introduced therein. It is necessary to close the vent off in normal operation of the fluid pressure system, and in known couplings this is achieved by a separate device.
It is for the purpose of dispensing with this additional device for closing off the vent that the invention proposes a feed connection device for a fluid pressure system of the type in 1 2 which a coupling has, at the front, a head designed to be received axially in a feed inlet body connected to a receiver device and, at the rear, a connecting piece designed for fixing the coupling at the end of a feed pipe, of the type in which the coupling is able to be held in position engaged axially inside the feed inlet by a pin with two legs forming a U which is engaged transversely in the body of the f eed inlet so as to cooperate with a radial annular groove arranged in the external cylindrical surface of the coupling, of the type in which a vent orifice for the receiver device is provided, and of the type in which a sealing joint is arranged between the head of the coupling and the feed inlet, wherein, in the engaged position, the coupling sealingly closes off the vent orifice, and wherein the coupling can occupy a position partially retracted axially towards the rear, in which position it is held by the holding means and in which position the feed inlet of the receiver device is put in communication sealingly with the vent orifice.
According to other characteristics of the invention:
- the vent orifice opens out substantially transversely in the feed inlet and a second sealing joint is arranged behind the vent orifice, between the coupling and the feed inlet; - the means of holding the coupling comprise a pin with two legs forming a U which is engaged transversely in the body of the feed inlet so as cooperate with a radial annular groove arranged in the external cylindrical surface of the coupling; - in the partially retracted position of the coupling, the pin is engaged transversely so as to cooperate with a second radial annular groove offset axially towards the front with respect to the first groove; - the second groove has a rear axial face bevelled so that, with the coupling in the partially retracted position and the pin in the transversely engaged position, and under the effect of an 3 axial f orce exerted towards the f ront on the coupling, or towards the rear on the feed inlet, the bevelled rear face of the second groove causes the radial separation of the legs of the pin so as to allow the coupling to pass towards its engaged position in which the legs of the pin drop elastically to the bottom of the first groove; - the pin is able to occupy a second intermediate position, partially retracted transversely, in which it is able to cooperate with the coupling through a broadened portion of the U, so that the coupling is able to be moved from its engaged position to its intermediate position, and vice versa; - the coupling is provided with a radial collar which is able to cooperate with the broadened portion of the U-shaped pin when the latter is in the intermediate position in order to prevent the complete disengagement of the coupling with respect to the feed inlet.
The invention also proposes a hydraulic cylinder for controlling a motor vehicle clutch, also referred to as the sending cylinder, comprising a connection device in accordance with the disclosures of the invention.
Other characteristics and advantages of the invention will emerge from a reading of the following detailed description, for an understanding of which reference will be made to the accompanying drawings in which:
- Figure 1 is a view in axial section of a device according to the disclosures of the invention, in which the coupling is illustrated in the partially retracted position; - Figure 2 is a view in transverse section along the line 2-2 in Figure 1 of such a device, in which the pin is in the transversely engaged position; 4 - Figure 3 is a view similar to that of Figure 1 in which the coupling is in the axially engaged position; Figure 4 is a view similar to that of Figure 2, in which the pin is in the intermediate position; - Figure 5 is a view in exploded perspective of a device according to the invention.
The feed connection device 10 for a fluid pressure system which is depicted in Figures 1 to 5 has essentially a feed inlet 12 whose body 14, substantially tubular, of axis X-X, is fixed to a hydraulic receiver device (not shown) and a coupling 16 designed to be fixed to the end of a feed pipe (not shown).
It has been decided to describe the device 10 for the case where the coupling 16 is considered to be movable with respect to the feed inlet 12, but it would of course be possible, without departing from the scope of the invention, to produce such a device in which the'Coupling 16 is fixed and in which the body 14 of the feed inlet 12 is connected to the end of a f lexible pipe and being thus connected to a receiver device indirectly.
The coupling 16 according to the invention has essentially at the front, that is to say to the left as seen in Figure 1, a head 18 which is designed to be received axially in the body 14 of the feed inlet 12, and to the rear, that is to say to the right as seen in Figure 1, a connecting piece 20 for connection to the feed pipe, for example a flexible pipe.
The coupling 16 is substantially tubular and has an internal duct 22 which opens out at the front axial end 24 of the coupling 16 in the feed inlet 12.
The feed inlet 12 is in the form of a stepped cylinder.
In a known manner, the feed coupling 16 is able to occupy an axially engaged position, which is depicted in Figure 3, in which it establishes a fluidtight communication between the feed pipe and the receiver device.
For this purpose, a first sealing joint 26, which is arranged in a radial annular housing 28, in this case in the form of a recess, in the front axial end 24 of the coupling 16 and which cooperates with a first cylindrical wall 30 of the feed inlet 12.
A vent 32 is produced in the form of a vent hole which is drilled transversely in the body 14 of the feed inlet 12 so as to open out in the feed inlet 12, behind the first cylindrical surface 30, so that, when the coupling 16 is in the axially engaged position, the sealing joint 26 sealingly separates the internal duct 22 in the coupling 16 and the receiver device on the one hand from the vent 32 on the other hand.
Thus the vent 32 opens out at 33 in a second cylindrical wall 34 of the feed inlet 12 which has a diameter greater than the first cylindrical wall 30 and which is arranged axially to the rear with respect thereto.
A second sealing joint 36 is arranged in an annular housing 38, in this case in the form of a recess, which is cut radially in the external periphery 40 of a cylindrical segment 42 of the coupling 16, the diameter of which is substantially equal to the diameter of the second cylindrical wall 34 of the inlet 12 and which participates in the guiding of the coupling 16 in the inlet 12.
The sealing joint 36 is arranged between the opening-out end 33 of the vent 32 and the opening-out end 44 of the inlet 12..
In a known manner, and as depicted in Figures 2 and 3, the coupling 16 is held in the axially engaged position inside the inlet 12 by a transverse U-shaped pin or peg 48, the two parallel legs 49 of which are engaged in a transverse housing 46 in the 6 body 14 of the f eed inlet 12. The two legs 49 of the pin 48 cooperate with a first annular groove 50 (Figure 1) of the coupling 16, behind the cylindrical guide segment 42.
The coupling 16 can occupy a second, partially retracted position, which is depicted in Figure 1 and in which the coupling 16 is partially withdrawn axially with respect to its engaged position in the feed inlet 12.
A coupling 16 is held in this second partially retracted position by the pin 48 which cooperates this time with a second annular groove 52, similar to the first groove 50, but arranged between the first groove 50 and the cylindrical guide segment 42.
In this second partially retracted position, the coupling 16 is withdrawn axially so that the first sealing joint 26 no longer bears on the first cylindrical surface 30 of the feed inlet 12 and so that in this way communication is established between the receiver device and the vent 32 on the one hand, but also between the internal duct 22 of the coupling 16 and the vent 32.
However, in this second partially retracted position, the second sealing joint 36 remains in contact with the second cylindrical surface 34 so that the fluid cannot be discharged other than through the vent 32.
Thus pressurised fluid can be injected inside the receiver device through the coupling 16 and thus expel air which would have remained trapped inside the receiver device and which could impair the correct functioning thereof.
The second groove 52, which is arranged axially in front of the first groove 50, has a rear axial face 54 bevelled so that, with the coupling 16 in the partially retracted position and the pin 4 8 in the transversely engaged position, and under the ef f ect of an axial force exerted towards the front on the coupling 16, the bevelled rear face 54 of the second groove 52 tends to cause the 7 radial separation of the legs 49 of the pin 48 so as to allow the coupling 16 to pass towards its engaged position in which the legs 49 of the pin 48 drop elastically to the bottom of the first groove 50.
In this way it is possible, when the coupling 16 is connected, to engage the pin 48 in the second groove 52 in the coupling 16, to inject pressurised fluid into the receiver device so as to purge it and, the purge being completed, to establish a fluidtight communication between the feed pipe and the receiver device simply by axially pushing the coupling 16 forwards.
This arrangement thus makes it possible to avoid manipulating the pin 48, or even withdrawing it completely, which prevents. the coupling 16, under the effect of the pressure accumulated in the receiver device during the purge operation, from retracting and completely disengaging axially from the feed inlet 12.
The transverse pin 48 can occupy a second intermediate position in which it is partially withdrawn transversely so that it cooperates with the coupling 16 through a broadened end portion 56.
In this position of the pin 48, the coupling 16 is free to pass from its axially engaged position to its partially retracted position, and vice versa.
However, in this second intermediate position of the pin 48, the coupling 16 cannot be disengaged axially towards the rear more than its partially re ' tracted position since provision is made for the broadened portion 56 of the pin 48 to be separated to an extent that it comes into abutment against the rear axial end face 58 of the cylindrical guide segment 42.
Thus it is possible to cause the coupling 16 to pass from its engaged axial position to its partially withdrawn intermediate position without for all that allowing its complete 8 disengagement.
Thus it is for example possible to reduce the pressure prevailing in the receiver device through the vent orifice 32.
A rear cylindrical radial collar 60, arranged between the head 18 and the connecting piece 20 of the coupling 16, cooperates with a rear cylindrical surface 62 of the feed inlet 12 in order to participate in the guiding of the coupling 16. This collar delimits the groove.
As will be understood, the joint 36 also effects airtightness (Figure 1).
9

Claims (9)

1. Feed connection device for a f luid pressure system of the type in which a coupling has, at the front, a head designed to be received axially in a body of a f eed inlet, the said body being connected to a receiver device, and, at the rear, a connecting piece designed for fixing the coupling at the end of a feed pipe, of the type in which the coupling is able to be held in position engaged axially inside the feed inlet by holding means, of the type in which a vent orifice for the receiver device is provided, and of the type in which a sealing joint is arranged between the head of the coupling and the feed inlet, wherein, in the engaged position, the coupling sealingly closes off the vent orifice, and wherein the coupling can occupy a position partially retracted axially towards the rear, in which position it is held by the holding means and in which position the feed inlet of the receiver device is put in communication sealingly with the vent orifice.
2. A device according to Claim 1, wherein the vent orifice opens out substantially transversely in the feed inlet and a second sealing joint is arranged behind the vent orifice, between the coupling and the feed inlet.
3. A device according to Claim 2, wherein the means of holding the coupling comprise a pin with two legs forming a U which is engaged transversely in the body of the feed inlet so as cooperate with a radial annular groove arranged in the external cylindrical surface of the coupling.
4. A device according to Claim 3, wherein, in the partially retracted position of the coupling, the pin is engaged transversely so as to cooperate with a second radial annular groove of f set axially towards the f ront with respect to the f irst groove.
5. A device according to Claim 4, wherein in that the second groove has a rear axial f ace bevelled so that, with the coupling in the partially retracted position and the pin in the transversely engaged position, and under the effect of an axial force exerted towards the front on the coupling, or towards the rear on the feed inlet, the bevelled rear f ace of the second groove causes the radial separation of the legs of the pin so as to allow the coupling to pass towards its engaged position in which the legs of the pin drop elastically to the bottom of the first groove.
6. A device according to Claim 5, wherein the pin is able to occupy a second intermediate position, partially retracted transversely, in which it is able to cooperate with the coupling through a broadened portion of the U, so that the coupling is able to be moved from its engaged position to its intermediate position, and vice versa.
7. A device according to Claim 6, wherein the coupling is provided with a radial collar which is able to cooperate with the broadened portion of the U-shaped pin when the latter is in the intermediate position in order to prevent the complete disengagement of the coupling with respect to the feed inlet.
8. Hydraulic cylinder for controlling a motor vehicle clutch, comprising a connection device according to any one of the preceding claims.
9. A device constructed and arranged substantially as shown in or described with respect to the accompanying drawings.
GB9613130A 1995-06-30 1996-06-21 A feed connection device for a fluid pressure system Expired - Fee Related GB2302926B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9508087A FR2736136B1 (en) 1995-06-30 1995-06-30 SUPPLY CONNECTION DEVICE FOR A FLUID PRESSURE SYSTEM AND HYDRAULIC CYLINDER FOR CONTROLLING A CLUTCH PROVIDED WITH SUCH A DEVICE

Publications (3)

Publication Number Publication Date
GB9613130D0 GB9613130D0 (en) 1996-08-28
GB2302926A true GB2302926A (en) 1997-02-05
GB2302926B GB2302926B (en) 1999-03-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB9613130A Expired - Fee Related GB2302926B (en) 1995-06-30 1996-06-21 A feed connection device for a fluid pressure system

Country Status (3)

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DE (2) DE19626016A1 (en)
FR (1) FR2736136B1 (en)
GB (1) GB2302926B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2342133A (en) * 1998-10-01 2000-04-05 Bundy Int Ltd A pipe coupling
GB2338043B (en) * 1998-05-07 2003-01-15 Automotive Prod Co Ltd Quick connect coupling for a hydraulic control system
GB2409010A (en) * 2003-11-28 2005-06-15 Tokai Rubber Ind Ltd Quick connector having wire retainer
US6983958B2 (en) * 2001-02-05 2006-01-10 Valeo Embrayages Supply connection device for a fluid pressure system
JP2007275593A (en) * 2006-04-03 2007-10-25 Nova Lung Gmbh Coupling for tubular elements

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FR2753772B1 (en) * 1996-09-26 1998-12-18 HYDRAULIC CONNECTOR FOR HYDRAULIC CLUTCH CONTROL
FR2762662B1 (en) 1997-04-23 1999-05-28 Valeo VIBRATION DAMPER OF A CLUTCH PEDAL FOR A MOTOR VEHICLE
DE19746537A1 (en) * 1997-10-22 1999-04-29 Schaeffler Waelzlager Ohg Servo cylinder for hydraulically operated clutch of motor vehicle
DE19754702A1 (en) * 1997-12-10 1999-06-17 Schaeffler Waelzlager Ohg Angle fitting for a pressure line of a hydraulic clutch actuation
DE19755548A1 (en) * 1997-12-13 1999-06-17 Schaeffler Waelzlager Ohg Master cylinder for hydraulic clutch or brake cylinder
DE19808315A1 (en) * 1998-02-27 1999-09-02 Schaeffler Waelzlager Ohg Slave cylinder for hydraulic clutch
US6101811A (en) * 1998-05-07 2000-08-15 Automotive Products (Usa), Inc. Quick connect coupling for a hydraulic control system including integral damper
FR2808071A1 (en) 2000-04-21 2001-10-26 Valeo Connector, for use between supply line for hydraulic fluid and hydraulic component, has head which fits into bore in component, sealing collars being formed on head by comolding or injection molding using two materials
FR2843625A1 (en) 2002-08-13 2004-02-20 Valeo Embrayages Connecting system for hydraulic pressure hose in car comprises tubular connector which fits into hose and is held in place by U-shaped clip, each arm of clip being designed like a hair grip
FR2843624A1 (en) 2002-08-13 2004-02-20 Valeo Embrayages Connecting system for hydraulic pressure hose in car comprises tubular connector which fits into hose and is held in place by U-shaped clip, each arm of clip being designed like a hair grip
DE102005046886A1 (en) * 2005-09-29 2007-04-05 Johannes Schäfer vorm. Stettiner Schraubenwerke GmbH & Co. KG Detachable plug connection for pipelines
DE102006052670B4 (en) * 2006-11-07 2011-09-29 Viega Gmbh & Co. Kg Mounting arrangement in the installation area
US8287006B2 (en) 2007-11-28 2012-10-16 Kongsberg Automotive As Tube coupling system for a pressurised fluid system
DE102009001737A1 (en) * 2009-03-23 2010-09-30 Zf Friedrichshafen Ag Hydraulic actuator with a venting arrangement and fluid coupling with a venting function
DE102010011812B4 (en) 2009-04-14 2019-10-10 Schaeffler Technologies AG & Co. KG Apparatus and method for filling a clutch actuation system
CN104251270B (en) * 2013-06-28 2018-05-25 舍弗勒技术股份两合公司 Be applied to clutch hydraulic separation system's bleed valve
DE102018106607B4 (en) * 2018-03-21 2019-11-14 Schaeffler Technologies AG & Co. KG Slave cylinder with tilt-protected adapter

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EP0397942A1 (en) * 1988-10-07 1990-11-22 Parker-Hannifin Corporation Releasable quick connect coupling

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EP0226689A1 (en) * 1984-06-21 1987-07-01 Ab Volvo Coupling arrangement for pressurized medium lines
EP0397942A1 (en) * 1988-10-07 1990-11-22 Parker-Hannifin Corporation Releasable quick connect coupling

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2338043B (en) * 1998-05-07 2003-01-15 Automotive Prod Co Ltd Quick connect coupling for a hydraulic control system
GB2342133A (en) * 1998-10-01 2000-04-05 Bundy Int Ltd A pipe coupling
GB2342133B (en) * 1998-10-01 2001-04-04 Bundy Internat Ltd Pipe connector
US6983958B2 (en) * 2001-02-05 2006-01-10 Valeo Embrayages Supply connection device for a fluid pressure system
GB2409010A (en) * 2003-11-28 2005-06-15 Tokai Rubber Ind Ltd Quick connector having wire retainer
GB2409010B (en) * 2003-11-28 2006-05-10 Tokai Rubber Ind Ltd Quick connector
US7201403B2 (en) 2003-11-28 2007-04-10 Tokai Rubber Industries, Ltd. Quick connector
JP2007275593A (en) * 2006-04-03 2007-10-25 Nova Lung Gmbh Coupling for tubular elements
JP2010234087A (en) * 2006-04-03 2010-10-21 Nova Lung Gmbh Coupling for tubular element

Also Published As

Publication number Publication date
DE19626016A1 (en) 1997-01-02
DE19655371B4 (en) 2012-12-20
GB2302926B (en) 1999-03-24
FR2736136B1 (en) 1997-08-08
FR2736136A1 (en) 1997-01-03
GB9613130D0 (en) 1996-08-28

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20080621