DE10000893B4 - Release device for a clutch of a drive unit for motor vehicles - Google Patents

Abstract

Release device for a friction clutch to be arranged between an internal combustion engine and a gearbox flanged to the internal combustion engine, comprising a guide tube (5) arranged in the housing bell, on the outer circumference of which a release bearing element (1) is axially movably guided radially, and a housing bell to be guided Clutch lever (2) for introducing clutch actuation forces which can be transmitted via the clutch lever (2) and the clutch release element (1) to a diaphragm spring, wherein the release bearing element (1, 1a) with the clutch lever (2) and with a ball head fixable on the transmission (7b) is preassembled to a detachable mounting unit, characterized in that the ball head (7b) with a bearing shell (11b) by a clamping extension (12) in a pan (8b) of the clutch lever (2) is held.

Description

The The invention relates to a release device for one between an internal combustion engine and one via a bell housing To be arranged on the internal combustion engine gear to be arranged friction clutch according to the generic term of claim 1.

With the DE 197 00 930 C2 a generic release device for a friction clutch has become known, which is easy to assemble and manages without an additional mounting fuse. There it is proposed to couple together a guide tube, a clutch lever and a release bearing element by movement limiting means to a preassembled unit, wherein between the three components to be used Axialhubbereich can be used within this coupling and wherein said coupling is separable under the action of an axial overcoming force. The movement limiting means are designed such that, upon disassembly of the bell housing from the internal combustion engine, they engage again in a locking manner under the pressure of the diaphragm clutch holding the friction clutch, thereby preventing the disengagement device from unintentionally falling apart when the bell housing of the internal combustion engine is disassembled. It is further proposed there, also a ball head, by which the clutch lever is pivotable in the operation of the friction clutch to deliver as part of the preassembled unit. According to the DE 197 00 930 C2 For this purpose, the ball head can be fixed to a bearing shell of the clutch lever by means of a bow-shaped retaining spring which is snapped on the clutch lever. The installation of such a retaining spring requires a certain amount of craftsmanship, is not faultless and also relatively complex overall.

From Starting from this prior art, the present invention directed to a preassembled release device of the beginning mentioned To provide genus with an improved arrangement of the ball head.

The The above object is achieved in a generic release device by the ball head with a bearing shell by a clamping extension in a pan of the clutch lever is held.

refinements and further developments of the invention are the dependent claims remove.

The Attachment of the ball head to the gearbox can be easily mounted Have plug connection. The release bearing element can be in the clutch lever also be held by a preload spring, which coincides with her first turn sets around an extension of the release bearing element, the protrudes through the clutch lever and through the first turn against falling out is secured. The preload spring rests on the gearbox side in the way that the movement of the clutch lever in the longitudinal direction relative to the release bearing element on one as possible small game is brought, thereby avoiding noise in the installed state become. The assembly unit, consisting of clutch lever, release bearing element and ball head with retaining spring may additionally have a sealing element in the guide tube included, which after attachment of the coupling tube to the transmission this seals against the clutch space.

There it for a type of motor vehicle is several transmission variants, the aforementioned assembly unit by a colored design of a be characterized of the components of the mounting unit, what the am best a plastic guide part on the release bearing element suitable.

The Mounting unit is also also for transmission variants suitable, where the guide tube for functional reasons already on the gear must be, the rest may not be mounted yet. Such a case is given when the gearbox is in front of it Assembly tested for leaks must be or if the guide tube integral part of the gearbox in connection with the seal is. Should the sealing ring around the transmission input shaft in the guide tube be integrated, such a guide tube can either at the Mounting unit arranged or already with the gearbox in front of a Union of the two elements be pre-assembled.

Based several drawings become release devices explains The pre-assembled with several components to each one mounting unit are. Show it

1 a clutch lever having a release bearing member disposed thereon;

2 a clutch fork with the release bearing element arranged thereon;

3 the clutch fork with the release bearing element and a likewise incorporated into this assembly unit ball and a guide tube, which can be selectively releasably connected to the release bearing element;

4 a release device according to the invention with a release lever, a release bearing element and a ball head and optionally the guide tube, which may be connected to the release bearing element;

5 a ball head on the clutch lever or on the clutch fork, which is held in position with a retaining spring;

6 the clutch lever or the clutch fork with a modified release bearing element, which is held by a preload spring in position.

Will with 1 designates a release bearing element, so this is with a clutch lever 2 according to 1 or with a clutch fork 3 according to 2 releasably connected, wherein the connection of a snap hook 4 which snaps behind a corresponding contour and in this way with the clutch lever 2 or the clutch fork 3 forms a mounting unit according to 3 through a ball head 7a can be extended by a retaining spring 11a on the clutch fork 3 is held and also a releasable connection with the clutch fork 3 received. To complete the mounting unit, a guide tube 5 in the release bearing element 1 are introduced and connected to this example, via a snap connection. An assembly unit, consequently consisting of the coupling fork 3 , the release bearing element 1 , the ball head 7a with its retaining spring 11 as well as with the guide tube 5 can be attached to a gearbox 6 be easily mounted if a fastening extension 9 of the ball head 7a into a mounting box 14 in the gearbox 6 is introduced and fixed there. Likewise, it must be fastened around a guide shaft (not shown here) 5 with a flange 15 on the gearbox 6 , whereby the assembly work on the transmission are completed and the transmission can be coupled with an internal combustion engine.

Analogous to the mounting unit according to 3 can a mounting unit according to the invention according to 4 be put together, from the clutch lever 2 , the release bearing element 1 and a ball head 7b which consists of a clamping extension 12 with the clutch lever 2 releasably connected and a fastening extension 9 having, with the Befestigungsbohurng 14 in the gearbox 6 can be connected. Optionally, the mounting unit, the guide tube 5 be added, which with its flange 15 on the gearbox 6 can be fastened after the mounting unit on the attachment extension 9 of the ball head 7b in the mounting hole 14 was positioned and the guide tube 5 has been brought to the correct position of the transmission housing via the transmission shaft, not shown here.

Mounting units according to the 3 and 4 can on the gearbox 6 be mounted when the transmission shaft against the gearbox 6 already sealed and no oil can escape from the transmission in the area of the mounting units. However, such a seal in the transmission housing 6 not present, this may be the guide tube 5 be slammed, the gearbox is sealed only when the guide tube 5 pushed with the seal arranged there over the gear shaft and with its flange 15 on the gearbox 6 is attached.

According to 5 becomes a connection of a ball head 7c shown with a retaining spring 11c in a pan 8c is held, with the pan 8c a component of the clutch lever 2 or the clutch fork 3 is. Just like the ball head 7c the ball heads sit 7b and 7a each in pans 8b and 8a , with the pan 8b a component of the clutch lever 2 and the pan 8a a component of the clutch fork 3 can be. The peculiarity of the ball head 7b is that between the ball head 7b and the pan 8b a bearing shell 11b is arranged, with the clamping extension 12 on the clutch lever 2 is attached and in which the ball head 7b can snap releasably.

According to 6 is a release bearing element 1a shown, which either with a clutch fork 3 or a clutch lever 2 can be connected, that a preload spring 10 this release bearing element 1a attached with an initial turn on a part which the clutch fork 3 or the clutch lever 2 projects through. The preload spring 10 rests on the gearbox housing 6 off and gets along with the clutch lever 2 or the clutch fork 3 over the guide tube 5 against the gearbox 6 guided, the preload spring 10 in the installed state, namely after assembly of the transmission on the internal combustion engine is compressed by a partial amount, with a preload on the clutch fork 3 or the clutch lever 2 exercises with the result that in the unloaded state resulting games are consumed unilaterally and rattling noises are avoided.

With regard to the function, it should be noted that an actuating element 13 the clutch lever 2 or the clutch fork 3 moved relative to a diaphragm spring in the clutch on the internal combustion engine, wherein the clutch lever 2 around the center of the ball head 7b pivots and being the clutch fork 3 around the center of the ball head 7a swings.

The advantage of the proposed assembly unit is that it allows a supplier to provide a complete operating unit for the coupling of a drive unit for motor vehicles, which gives optically insufficiently distinguishable designs the possibility of color differences To facilitate an assignment of the respective mounting unit to the particular type of motor vehicle for the installation customer. Since the distinctions primarily in the execution of the release bearing element 1 / 1a lie, it is proposed plastic parts in the release bearing element 1 . 1a made of differently colored plastics.

LIST OF REFERENCE NUMBERS

1

Ausrücklagerelement

1a

Ausrücklagerelement

2

clutch lever

3

clutch fork

4

snap hooks

5

guide tube

6

gearbox

7a

ball head

7b

ball head

7c

ball head

8a

pan

8b

pan

8c

pan

9

Attachment projection

10

preload

11a

retaining spring

11b

bearing shell

11c

retaining spring

12

Clamping extension

13

actuator

14

mounting hole

15

flange

Claims (5)

Release device for a friction clutch to be arranged between an internal combustion engine and a gearbox flanged to the internal combustion engine via a bell housing, comprising a guide tube arranged in the bell housing (US Pat. 5 ), on the outer circumference of a release bearing element ( 1 ) is axially movably guided radially, and a to be addressed to the bell housing clutch lever ( 2 ) for introducing clutch actuation forces transmitted via the clutch lever ( 2 ) and the release bearing element ( 1 ) can be transferred to a diaphragm spring, wherein the release bearing element ( 1 . 1a ) with the clutch lever ( 2 ) and with a fixable on the gear ball head ( 7b ) is preassembled to a detachable mounting unit, characterized in that the ball head ( 7b ) with a bearing shell ( 11b ) by a clamping extension ( 12 ) in a pan ( 8b ) of the clutch lever ( 2 ) is held. Release device according to claim 1, characterized in that the release bearing element ( 1 . 1a ) with the guide tube ( 5 ) can be preassembled to a detachable mounting unit. Release device according to claim 1 or 2, characterized in that the guide tube ( 5 ) with the release bearing element ( 1 ) Is releasably connected by a snap connection. Release device according to one of claims 1-3, characterized in that the release bearing element ( 1a ) on the clutch lever ( 2 ) with a preload spring ( 10 ) provided by support against the transmission for backlash or preload in the actuation system. Release device according to one of claims 1-4, characterized in that the attachment of the ball head ( 7b ) has a plug connection on the transmission.

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