DE102008027885A1 - Coupling device e.g. brake fluid operated coupling device, has fluid path formed under inclusion of non-circulating solder ring element, where ring element is supported over slave cylinder device - Google Patents

Abstract

The device has a slave cylinder device (3) arranged in such a manner that torque acting at a disk structure (1) is transferred to a disk structure (2). The cylinder device has a ring piston (4) arranged coaxially to a coupling axis (X), where the piston limits a fluid area (6). The fluid area communicates with a fluid path (7) over which the fluid area is selectively supplied with fluid. The path is formed under inclusion of non-circulating solder ring element (9), which provides an inner channel that communicates with the fluid area. The ring element is supported over the cylinder device.

Description

Field of the invention

The The invention relates to a means of a pressure medium, in particular a brake or other hydraulic fluid actuated Coupling device, with a rotating around a coupling axis drive-side clutch disk structure; one also around the Clutch axle circumferential output side clutch disk structure, and a follower slave cylinder device for instigation, or Cancellation of a coupling state in which the two clutch disc structures are stretched against each other so that one in the drive side Clutch disc structure coupled torque on frictional Transfer paths to the output side clutch disk structure becomes.

Background of the invention

Out DE 101 02 300 A1 is a coupling device of the aforementioned type known. In this known coupling device, the supply of the pressure medium, in particular hydraulic fluid to a drive side idler slave cylinder device via a transmission side provided socket portion in which a fluid channels equipped and inserted as an extension of the slave cylinder device hollow pin is inserted. In this design, there is the problem that the installation of the transmission requires great care to avoid damage to the provided between the transmission-side bushing portion and the hollow pin Bewegtflächdichtungen.

Object of the invention

Of the Invention has for its object to provide solutions by which it becomes possible a coupling device to provide the aforementioned type which is characterized by a robust and overall cost-effective construction characterizes and in an advantageous from montagetechnischen aspects Way can be integrated into a drive system.

invention solution

• – einer um eine Kupplungsachse umlaufenden antriebsseitigen Kupplungsscheibenstruktur;
• – einer, ebenfalls um die Kupplungsachse umlaufenden abtriebsseitigen Kupplungsscheibenstruktur,
• – einer Nehmerzylindereinrichtung zur Herbeiführung oder Aufhebung eines Koppelungszustands in welchem die beiden Scheibenstrukturen derart gegeneinander gespannt sind, dass ein an die antriebsseitige Kupplungsscheibenstruktur angelegtes Drehmoment auf reibschlüssigem Wege auf die abtriebsseitige Kupplungsscheibenstruktur übertragen wird, wobei
• – die Nehmerzylindereinrichtung einen koaxial zur Kupplungsachse angeordneten und eine Getriebewelle umgreifenden Ringkolben aufweist der in einer Ringzylinderkammer aufgenommen ist und gemeinsam mit der Ringzylinderkammer einen Fluidraum begrenzt, und
• – wobei der Fluidraum mit einem Fluidweg kommuniziert über welchen in den Fluidraum selektiv Fluid eingespeist oder aus diesem abgeleitet werden kann,
• – wobei der Fluidweg über ein stationäres, nichtumlaufenden Speiseringelement verläuft das an die Nehmerzylindereinrichtung abzugsgesichert angebunden und an der Nehmerzylindereinrichtung in radialer Richtung gelagert ist.

This object is achieved by a coupling device, with:

• - One around a clutch axis rotating drive-side clutch disk structure;
• A, likewise about the coupling axis rotating output-side clutch disk structure,
• - A slave cylinder device for bringing about or canceling a coupling state in which the two disc structures are clamped against each other such that a torque applied to the drive-side clutch disc structure torque is transmitted in a frictional way to the output-side clutch disc structure, wherein
• - The slave cylinder means arranged coaxially to the coupling axis and a transmission shaft encompassing annular piston which is received in a ring cylinder chamber and together with the annular cylinder chamber limits a fluid space, and
• Wherein the fluid space communicates with a fluid path via which selectively fluid can be fed into or out of the fluid space,
• - Wherein the fluid path via a stationary, non-rotating Speiseringelement which is connected to the slave cylinder device secured against withdrawal and mounted on the slave cylinder device in the radial direction.

Thereby it is possible in an advantageous manner, the slave cylinder to be used as a bearing structure for the storage of the feed part and the feed part in the context of a gearbox preceding Assembly step sensitive and easy to monitor Way to secure the slave cylinder. In further particularly advantageous Ways become even with the occurrence of misalignments between Transmission and pressure plate housing excessive Radial loads of the motion sealing system avoided. Farther solves the problem that the coupling side geometries with high precision on the possibly temporally offset and if necessary in other production facilities outside the sphere of influence of the clutch manufacturer geared structures must be tuned. The inventive concept makes it possible the slave cylinder and the bearing of this mounted Speiseringstruktur as self-contained and under the responsibility of a manufacturer manufactured assembly to implement their integration into a Drive system no special compatibility requirements includes and can be easily accomplished without special assembly techniques is. Furthermore, it becomes possible by simple exchange the clutch-side actuator structures all wear-relevant Renew components. Furthermore, it becomes possible the entire Assembly according to the invention as pre-vented Execute assembly.

According to a particularly preferred embodiment of the invention, the ring element is mounted on the outer wall of the annular cylinder chamber in the axial direction. The axial bearing of the ring element is preferably designed as using thrust washers as plain bearings. Preferably, the ring member is also by corresponding sliding bearing elements in the radial direction the outer wall stored. The axial bearing, as well as the radial bearing can be accomplished by flanged bushings provide both circumferential and end surfaces as storage areas.

The Securing the ring element against rotation in the circumferential direction preferably via a radially projecting pipe section. about This pipe section is advantageously the Fluid displacement to the ring cylinder chamber or from the ring cylinder chamber accomplished. The measures provided for securing the ring element Structures are preferably dimensioned so that they only the occurring under worst-case operating conditions maximum friction torque between the ring member and the slave cylinder device take up. Securing the ring element against rotation in the circumferential direction is preferably made so that no significant static overdetermination and coupling of unnecessary circumferential, radial, and Axial forces and corresponding pairs of forces he follows. The aforementioned pipe section can be used as a lever element act over which only the sufficient anti-rotation of the ring element can be achieved. This pipeline section, in particular an outer connection valve section can be relatively soft, in particular via an elastomeric bushing structure be set on the transmission side. That connection valve section can be designed so that a sufficient Fluid fill pre-vented into the system is, so immediately after connecting a likewise vented Master cylinder system a functional clutch operating device given is.

It is possible on the slave cylinder device a vent valve device provide over which in a certain crankshaft rotational position a venting of the fluid system can be made. According to a particular aspect of the invention it is also possible on the clutch side according to the invention stored stationary supply ring to provide a parallel ventilation duct system for example, one immediately next to the main line the bell crank outstanding vent valve as well one in the fluid chamber to a point as far overhead leading channel includes.

According to one particularly preferred embodiment of the invention in the ring member, a first sliding seal ring and a second Placed sliding seal, wherein the fluid path is a fluid path section comprises, which runs between these two Gleitdichtungsringen. These two Gleitdichtungsringe and cooperating with these Moving surfaces can be designed so that the sliding seal a seal on a cylindrical and circumferential outer peripheral surface takes place. alternative For this purpose, it is also possible, the sealing ring structures so to make that through this a seal axially against each other crowded annular end faces takes place.

The Ring cylinder chamber according to the invention is preferably directly to a, with an engine flywheel rotating clutch cover tethered. This clutch cover, the slave cylinder device and the mounted on this ring element can be preassembled and summarized in the assembly or repair process as a unit treated unit be.

In the clutch cover is preferably one by means of a spring plate actuated pressure plate mechanism added. This spring plate is preferably formed so that this radially inwardly to Coupling axis has penetrating spring arms. The ring piston and the spring plate are preferably formed so that the annular piston sits on the inner end of the spring arms. It is possible, even to integrate these components in a closed unit.

The kinematic integration of the annular piston in the invention Clutch mechanism is preferably accomplished such that Disengaging it, d. H. enlargement the volume content of the fluid chamber a discharge of the pressure plate and thus a release of the clutch is achieved.

The inventive coupling device can be extremely to save space. The inventive Coupling device can be completely pre-assembled Assembly to be connected to a corresponding engine. On Basis of the inventive concept is it possible to have a clutch cover fixed, hydraulically actuated Release system to create that immediately above the clutch cover can be attached to the flywheel. The connection of the possibly as relatively stiffer, but even more flexible Hose executed and the Speiseringelement in the circumferential direction securing feed channel to the clutch housing bell or otherwise stationary structures may be among the simplest Assembly techniques, eg. B. insertion of the feed channel end portion take place in a corresponding recording.

According to the invention an injection of that fluid in a rotating slave cylinder device by a stationary, non-rotating feed ring element the deducted secured to the slave cylinder device and mounted on the slave cylinder device in the radial direction is.

Brief description of the figures

Further Details and features of the invention will become apparent from the following Description in connection with the drawing. It shows:

1 a half-axial section for illustrating the structure of a coupling device according to the invention in a state with disengaged annular piston,

2 a further axial sectional view to illustrate the structure of the coupling device according to the invention in a state with retracted annular piston,

3 a further axial sectional view for illustrating a further embodiment of a coupling device according to the invention.

Detailed description the figures

In the 1 The clutch device shown comprises a, around a clutch axis X encircling, drive side connected first clutch disk structure 1 and a likewise about the clutch axis X encircling, output side, second clutch disk structure 2 ,

The coupling device further comprises a slave cylinder device 3 for the transfer of the two clutch disc structures 1 . 2 in a coupling state in which the two disc structures 1 . 2 are clamped against each other so that one in the drive-side clutch disc structure 1 coupled torque on frictionally engaged on the output side clutch disk structure 2 is transferred, wherein the slave cylinder device 3 a coaxial with the coupling axis X arranged and a gear shaft encompassing annular piston 4 having, in a ring cylinder chamber 5 is included.

By the in the ring cylinder chamber 5 recorded ring piston 4 becomes a fluid space 6 limited. This fluid space 6 communicates with a fluid path 7 over which the fluid space 6 selectively fluid can be fed or selectively fluid can be derived from this. By supplying fluid to the fluid space 6 becomes the ring piston 4 selectively axially against a clutch spring plate 8th crowded. With deduction of fluid from the fluid space 6 becomes the ring piston 4 relieved dives back into the annular chamber 5 one. This will cause the clutch spring plate 8th relieved indoors and can thus the pressure plate 19 against the friction lining 2a of the second clutch disk structure.

The coupling device shown here is characterized in that the fluid path of the fluid chamber system, which as such follows 5 with the stationary fluid supply connection 8th connected with the inclusion of a stationary ring element 9 is formed, which has a motion sealing system 10 on one the ring cylinder chamber 6 skirting outer wall 11 sitting.

In the embodiment shown here, the ring element 9 directly on the outer wall 10 of the Fuidkammersystems 5 stored in the axial and radial directions. The axial bearing is made by a made of a plain bearing material, in particular of a plastic plain bearing material collar bushing 12 and a stop ring 13 accomplished. The stop ring 13 is through a circlip 14 axially to the, the ring cylinder chamber 5 defining structural component defined.

In the embodiment shown here, this is the ring cylinder chamber 5 forming structural component at one, together with the first clutch disc structure 1 encircling bell 15 by the here recognizable riveting 16 attached. The ring cylinder chamber 5 defining structural component thus runs with the first clutch disc structure 1 around. Through the collar bush 12 is next to a determination of the axial position of the ring element 9 on the ring cylinder chamber 5 forming structural component and a radial bearing of the ring element 9 reached.

In the ring element 9 is a first sliding seal 17 and a second sliding seal 18 added. The the fluid chamber 6 with the stationary fluid path 7 connecting fluid path section 7a extends between these two Gleitdichtungsringen 17 . 18 ,

The coupling device shown here is designed such that via the annular piston 4 the here recognizable spring arms 8a a spring plate 8th be operated. About this spring plate 8th turn is a printing plate mechanics 19 actuated. About this printing plate mechanics 19 can the friction lining 2a the second clutch disk structure 2 against the first clutch disk structure 1 as well as against the non-rotatably coupled friction surface of the pressure plate 19 be urged. By appropriate clamping of the friction lining 2a the second clutch disk structure 2 between the first clutch disk structure 1 and the printing plate 19 is a transmission of the in the first clutch disk structure 1 introduced drive torque in the second clutch disk structure 2 reached.

In the embodiment shown here, the coupling device is designed such that by the disengagement or extension of the annular piston 4 in the extended state shown here a relief of the printing plate mechanics 19 and thus a release of the coupling device is achieved. However, it is also possible to make the kinematic coupling of the hydraulic actuator system with the pressure plate mechanism so that for bringing about an engagement or torque transmission state, a pressurization of the annular piston is required.

For the sectional view to 2 The previous remarks are largely analogous. Deviating from the illustration according to 1 is located in 2 illustrated coupling device in a state with a maximum retracted annular piston 4 , In this position of the ring piston 4 will relieve the spring arms 8th reached the clutch spring plate. In this state, the pressure plate 19 against the friction lining 2a the second clutch disk structure 2 crowded. In this state, there is a frictional transmission of the at the first clutch disk structure 1 applied torque on the second clutch disk structure 2 ,

In the coupling device according to the invention, the slave cylinder piston acted upon by pressure sits directly on the plate spring tongues 8a , To disconnect the clutch is the ring piston 4 extended and thus against the diaphragm spring tongues 8a pressed. The housing of the slave cylinder is directly on the lid 15 attached to the clutch and thus rotatably in the circumferential direction with this cover 15 coupled and thus rotates together with the flywheel 1 a corresponding engine. The supply of the required for the actuation of the slave cylinder pressure medium, for. As a brake fluid is carried by a arranged on the slave cylinder feed 9 , The feed part is exemplary by means of a collar bushing 12 , which is preferably made of a Permaglide material, mounted radially and axially on the outer diameter of the slave cylinder housing. Against axial migration is a sliding disk 13 provided, which are preferably also made of a Permaglide plastic material and through the snap ring 14 is axially secured.

The transfer bores 40 in the slave cylinder housing open either in a still circulating component, or in the seated dining ring 9 formed circumferential groove, whereby the supply of the pressure medium via the supply holes 40 guaranteed in the slave cylinder. Because of the transfer bores 40 are arranged radially on the slave cylinder, no axial forces are exerted on the feed.

The relatively low torque generated due to seal friction and sliding friction is achieved by supporting the whistle-like portion of the feed member on the clutch housing bell 20 (shown in dot-dash lines).

The sealing takes place, as already mentioned, by way of example via the compact sealing rings shown here 17 . 18 , which are made when using brake fluid as a pressure medium, preferably made of an EPDM elastomeric material.

According to another aspect of the present invention, it is proposed the slave cylinder piston 4 with highly wear-resistant, low-friction plastic coating, z. B. PA46 CF30 or PTFE5 to overmold, whereby a particularly tight guide clearance between the bore of the plastic piston and the guide diameter is possible. It is also proposed to provide a plastic lining at the contact point slave cylinder piston and clutch plate spring tongues.

By the inventive concept results in a particularly compact design of a coupling device, as such an axially relatively high load, highly stiff release mechanism offers. Through the plastic coating at the contact point of the slave cylinder piston and the clutch plate spring tongues becomes the efficiency of the release system significantly improved and the wear at the contact point considerably reduced. Furthermore, by the inventive Concept a length or axis offset compensation between the feed part and the slave cylinder housing dispensable.

In 3 a further variant of a coupling device according to the invention is shown, which also has a cover-resistant release system for relatively high clutch forces and a sealing variant with prestressed radial shaft seals 21 . 22 having. As can be seen from this illustration, the seals with the "open" side of the receiving bore of the supply part 9 facing. By the spacing of the sealing rings 21 . 22 becomes a ring channel between the sealing rings 24 formed, via which the pressure medium, (eg, the branched off from the brake circuit via the clutch master cylinder brake fluid) in the supply bores 25 the slave cylinder 26 can get.

On the open side of the feed part, the fitting seal is covered by a lid 27 supported. This lid 27 is in the embodiment shown here on the feed 9 through a screw connection 28 attached. The lid 27 continues to serve as a carrier part for the radial / axial sliding bearing 29 ,

The pressure medium supply serving "feed pipe" can be integral with the feed part be guided and possibly include integrated filter devices. The supply part can be designed in several parts with a pressed-seal block and secured axially with a snap ring.

The supply of the medium via the radial bores. The storage of the feed part 9 via the housing bore. The media supply takes place on the outer circumference, the storage of the feed 9 can as shown here Darge by plain bearings or possibly also done by rolling bearings. The sliding bearing is made on both sides by means of flanged bushes by a molded plastic coating. The sealing is preferably carried out by Quard sealing rings or radially prestressed PTFE rings (O-ring, worm spring).

The feeding part 9 and possibly also the follower slave cylinder housing is preferably each of AL die-cast or plastic, eint. or built in several parts.

The according to the invention feeding the pressure medium over a mounted on the slave cylinder device feed ring with integrated seal is also for pneumatically operated and hydraulically operated low pressure system slave cylinder usable.

At the feed ring according to the invention can also other channels, in particular ring channels be provided for the derivation of leakage oil.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10102300 A1 [0002]

Claims (11)

Coupling device, comprising: - a drive-side first clutch disk structure (A) surrounding a clutch axle (X) 1 ); A likewise on the clutch axis (X) encircling output-side second clutch disk structure ( 2 ), - a slave cylinder device ( 3 ) for establishing or canceling a coupling state in which the two disk structures ( 1 . 2 ) are clamped against each other such that a on the drive-side clutch disc structure ( 1 ) applied torque frictionally on the output side clutch disc structure ( 2 ), wherein - the slave cylinder means arranged coaxially with the clutch axis (x) and a transmission shaft encompassing annular piston ( 4 ) has a fluid space ( 6 ), and - wherein the fluid space ( 6 ) with a fluid path ( 7 ) communicates via which the fluid space ( 6 ) can be selectively supplied to or derived from fluid, - wherein the fluid path ( 7 ) including a non-rotating feed ring element ( 9 ) that provides an internal channel that communicates with the fluid space ( 6 ), and - wherein the feed ring element ( 9 ) via the slave cylinder device ( 3 ) is stored. Coupling device according to claim 1, characterized in that the feed ring element ( 9 ) on an outer wall ( 11 ) sits as such a ring cylinder chamber ( 5 ) and on this outer wall ( 11 ) by a revolving structure ( 13 ) Is secured in the axial direction. Coupling device according to claim 2, characterized in that the axial bearing of the feeding ring element it ( 9 ) is designed as a sliding bearing. Coupling device according to at least one of claims 1 to 3, characterized in that the feed-ring element ( 9 ) is mounted in the radial direction on the outer wall. Coupling device according to at least one of claims 1 to 4, characterized in that the securing of the Speiseringelementes ( 9 ) is accomplished against rotation in the circumferential direction via a radially projecting pipe section. Coupling device according to at least one of claims 1 to 5, characterized in that in the feed ring element ( 9 ) a first sliding seal ring ( 17 ) and a second sliding seal ring ( 18 ) are arranged, and that the fluid path ( 7 ) comprises a fluid path section which between these two Gleitdichtungsringen ( 17 . 18 ) runs. Coupling device according to at least one of claims 1 to 6, characterized in that the annular cylinder chamber ( 5 ) to a printing plate lid ( 15 ) is attached. Coupling device according to claim 7, characterized in that in the pressure plate lid ( 15 ) one by means of a spring plate ( 8th ) actuated printing plate mechanism is included. Coupling device according to claim 8, characterized in that the spring plate ( 8th ) radially inwardly to the coupling axis (X) penetrating spring arms ( 8a ), and that the annular piston ( 4 ) on the inner end regions of the spring arms ( 8a ) is seated. Coupling device according to at least one of claims 1 to 9, characterized in that the kinematic integration of the annular piston ( 4 ) is accomplished such that by disengaging the same a discharge of the printing plate 19 ) and thus a release of the clutch is achieved. Coupling device, comprising: - a drive-side clutch disk structure surrounding a clutch axle (X) ( 1 ); An output-side clutch disk structure likewise revolving around the clutch axle (X) ( 2 ), - a slave cylinder device ( 3 ) for bringing about or canceling a coupling state in which the two disk structures ( 1 . 2 ) are clamped against each other such that a on the drive-side clutch disc structure ( 1 ) applied torque frictionally on the output side clutch disc structure ( 2 ), wherein - the slave cylinder means arranged coaxially with the clutch axis (x) and a transmission shaft encompassing annular piston ( 4 ) has a fluid space ( 6 ), and - wherein the fluid space ( 6 ) with a fluid path ( 7 ) communicates via which the fluid space ( 6 ) can be selectively supplied to or derived from fluid, - wherein the fluid path ( 7 ) via a non-rotating feed ring element ( 9 ) passes through a motion sealing system ( 17 . 18 ) and radially mounted on a side provided by the slave cylinder device pin portion and axially secured.