WO2018065004A1

WO2018065004A1 - Clutch cover arrangement for a friction clutch

Info

Publication number: WO2018065004A1
Application number: PCT/DE2017/100783
Authority: WO
Inventors: Dominik Weis
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2016-10-07
Filing date: 2017-09-14
Publication date: 2018-04-12
Also published as: KR102500027B1; DE102016219460A1; DE112017005066A5; KR20190067782A

Abstract

A clutch cover arrangement (56) for a friction clutch (12) for coupling a drive shaft of a motor vehicle engine to at least one transmission input shaft of a motor vehicle transmission is provided, having a clutch cover (34) for at least partially covering the friction clutch (12), and an actuating element (38) for axially moving a pressure plate (16) of the friction clutch (12) relative to a counterplate (18) of the friction clutch (12), wherein the clutch cover (34) has a transport securing means (52) which is configured in one piece with the clutch cover (34) and engages behind the actuating element (38). The number of components can be reduced by way of the transport securing means (52) which is configured in one piece with the clutch cover (34), with the result that an inexpensive friction clutch is made possible.

Description

Clutch cover assembly for a friction clutch

The invention relates to a clutch cover assembly for a friction clutch, with the aid of a friction clutch can be actuated.

From DE 10 2013 201 697 A1 discloses a double clutch with a clutch cover assembly for a friction clutch is known in which a configured as a plate spring actuator for axial displacement of a pressure plate of the friction clutch is centered on connected to a transmission-side clutch cover centering. With the centering pin a transport lock is connected as a separate component. The transport lock is designed as a spring which penetrates the actuating element and is hooked on the side facing away from the clutch cover side with the actuating element. By biasing the pressure plate by means of a return spring and / or an adjusting spring of an adjusting the entangled with the actuating element transport lock is held in position, so that a Nachstellereignis can be avoided by the adjustment before mounting. After assembly, when a clutch disc between a counter-plate of the friction clutch and the pressure plate is positioned and too strong adjustment of the pressure plate can be prevented by the clutch disc itself, the transport lock can be solved. For this purpose, the friction clutch is brought into the closed position, in which the actuating element is positioned closer to the clutch cover and automatically lifts the transport securing device from the actuating element. The transport lock can move due to their own bias in a position in which the transport lock can no longer block the regular operation of the friction clutch. There is a constant need for a low-cost friction clutch. It is the object of the invention to show measures that allow a cost-effective friction clutch.

The object is achieved by a Kupplungsdeckelanord- with the features of claim 1. Preferred embodiments of the invention are set forth in the subclaims and the following description, each of which individually or in combination may constitute an aspect of the invention.

According to the invention, a clutch cover assembly for a friction clutch for coupling a drive shaft of a motor vehicle engine with at least one transmission input shaft of a motor vehicle transmission provided with a clutch cover for at least partially covering the friction clutch and a, in particular in the form of a plate spring designed actuator for axially displacing a pressure plate of the friction clutch relative to a counter-plate of the friction clutch, wherein the clutch cover has an integrally formed with the clutch cover and the actuating element engages behind transport safety.

The actuating element can rest, in particular with prestressing, for example in a maximally open position on the engaging part of the transport securing device, so that a complete release of the actuating element from the clutch cover assembly during transport can be positively blocked by the transport securing device. By a sufficiently high bias of the voltage applied to the transport locking actuator rattling noises and / or damage to sudden shocks during transport can be avoided. Since the transport lock can not be configured as a spring element, but in particular as a rigid hook, it is possible not to provide the transport lock as a separate component, but to integrate integrally into the clutch cover. The number of construction is thereby kept low, whereby the manufacturing cost and / or the installation costs can be reduced. By integrally designed with the clutch cover transport lock the number of components can be reduced, so that a cost-effective friction clutch is possible. In order to mount the clutch cover assembly, the transport lock can first be passed through the actuator and subsequently twisted the particular designed as a plate spring actuator relative to the clutch cover until a part of the particular hook-shaped transport lock engages behind a portion of the actuator. For this purpose, sufficient clearance in the circumferential direction may be provided for the actuating element in order to be able to turn the actuating element from an assembly position for passing the transport securing device into an end position engaged behind the transport securing device. For this purpose, a small, in particular limited, rotatability of the actuating element in the circumferential direction is already sufficient. Optionally, the rotatability of the actuator can be limited by acting in the tangential direction attacks to simplify the assembly and to avoid misalignment of the actuator in the circumferential direction. The corresponding stop can in particular be designed in one piece with the clutch cover, in particular with the transport lock. The actuating element can, in particular when the actuating element is designed in the manner of a plate spring, press in the end position with a spring force against the engaging behind part of the transport lock, so that a non-positive determination of the actuating element during transport can be given.

The clutch cover assembly can be installed as a separate assembly. Optionally, the clutch cover assembly may be preassembled in a friction clutch. By the transport lock can be prevented that a wear adjustment of the friction clutch is triggered during transport of the clutch cover assembly, whereby a mounting of a clutch disc between the counter plate and one of the wear adjusting axially nachgeschetzte pressure plate could be thwarted. In the case of a friction clutch without a wear adjustment device, the transport securing device can enable desired, in particular the lowest possible, assembly forces during assembly. For example, the clutch cover can be made of a steel, so that it is possible to partially punch out the transport safety device from the remaining material of the clutch cover and to reshape it without cutting, so that the transport lock, in particular in the form of a hook, can protrude from the remaining clutch cover. In particular, the actuating element between an assembly position, in which the actuating element is movable past the transport lock in the axial direction, and an end position, in which the transport lock the actuator viewed in the axial direction at least partially covers the side facing away from the clutch cover axial side, rotatable. The actuator can be easily mounted by attaching to the transport locks of the clutch cover and a subsequent rotation relative to the clutch cover and secured by the transport lock. Preferably, the actuating element, in particular between two following in the circumferential direction substantially radially projecting spring tongues, on a passage opening for passing the transport lock on. As a result, it is not necessary to pass the respective transport lock through exactly one associated spring tongue and to significantly weaken the corresponding spring tongue with the passage opening. A weakening of the spring tongues through the passage opening can, if at all, be reduced to a minimum. In particular, it is possible to maintain a plate-spring-like annular region of the actuating element without a passage opening. Particularly preferably, the transport lock has a substantially in the axial

Direction extending web and an on the side facing away from the clutch cover axial side of the web protruding hook for engaging behind the actuating element. The transport lock can thereby be configured in the manner of a hook, which is guided with its web through the actuating element and engages behind a part of the actuating element with its laterally projecting from the web hook. Such a design can be easily produced by chipless forming techniques cost.

In particular, the hook is substantially in tangential direction from the web. A radial protrusion of the hook, which could possibly affect a spring property of a plate-spring-like annular portion of the actuating element, can be avoided. In addition, the hook can easily engage behind a spring tongue of the actuating element, so that no significant geological metric adjustments of the actuating element are required to allow the engagement of the hook behind.

Preferably, only one hook is connected to the web. Hooks projecting in both tangential directions are thereby avoided. This can be avoided that upon rotation of the actuating element during assembly, the actuating element is rotated too far and the other hook then locks the actuator. In addition, only exactly one direction of rotation for the actuating element during assembly of the clutch cover assembly is predetermined, whereby the assembly is simplified and assembly errors are avoided.

More preferably, a plurality of substantially identically shaped transport securing of the clutch cover are integrally formed, wherein all hooks protrude either in the radial direction or in the tangential direction of the respective web. As a result, several matching relative positions in the circumferential direction of the actuating element relative to the clutch cover can result, in which the actuating element can be mounted in the transport position with the clutch cover. The assembly is simplified and accelerated. In addition, the majority of transport locks can lead to a correspondingly high frictional engagement, which allows a positionally fixed positioning of the actuating element during transport.

In particular, a spring element presses the actuating element against the transport lock, wherein in particular the spring element by a disengaged with the Kupplungsde- and the pressure plate return spring for positioning the pressure plate in a defined starting position in the operating position and / or a Nachstellfeder a biased adjusting device for adjusting a wear-related misalignment the pressure plate is formed. The spring force of the spring element can lead to a correspondingly increased normal force of the actuating element on the engaging part of the transport lock, whereby a correspondingly high friction is given, which can prevent unintentional release of the actuating element during transport. Preferably, the clutch cover, in particular designed as a separate centering, substantially projecting in the axial direction centering, wherein the actuating element is centered on the centering. The actuating element can be centered on the centering elements. By the transport backup can be additionally prevented that the actuating element leaves the centering formed by the centering, for example, by tilting of the actuating element is prevented.

Particularly preferably, the clutch cover on a side facing away from the Betätigungsele- axial side protruding further transport safety devices, the further transport lock a, in particular in the manner of a plate spring ausgestaltetes, another actuator for axially displacing a further pressure plate of another friction clutch relative to another counter-plate engages behind the further friction clutch. The clutch cover can thereby be used for a double clutch, wherein both the transport lock of the friction clutch and the transport lock of the further friction clutch can be designed in one piece with the clutch cover. For this purpose, the transport locks can protrude in different axial directions of the clutch cover. The further transport securing means provided for the further friction clutch and / or the kinematics of movement can be designed and developed analogously to the transport securing provided for the first friction clutch.

The invention further relates to a friction clutch, in particular double clutch, for coupling a drive shaft of a motor vehicle engine with at least one gear input shaft of a motor vehicle transmission with a pressure plate for frictionally pressing a clutch disc between the pressure plate and a counter plate and a lid assembly, which as described above and further educated may be, for the axial displacement of the pressure plate. By integrally designed with the clutch cover transport lock the number of components can be reduced, so that a cost-effective friction clutch is possible.

The invention will be explained below by way of example with reference to the accompanying drawings with reference to preferred embodiments, wherein the following These features, both individually and in combination, may constitute an aspect of the invention. Show it:

1 is a schematic sectional view of a dual clutch,

2 shows a schematic perspective view of the dual clutch from FIG. 1 and FIG. 3 shows a schematic perspective view of a clutch cover of the dual clutch from FIG. 1 and FIG. 2.

The dual clutch 10 shown in FIG. 1 has a first friction clutch 12 and a further second friction clutch 14. The first friction clutch 12 has a first pressure plate 16 which can be axially displaced relative to a first counter-plate 18 to frictionally compress a first clutch disc 20 connected to a first transmission input shaft between the first pressure plate 16 and the first counter-plate 18. With the first pressure plate 16 and a driver ring 22 or a central plate 32 designed as a leaf spring first return spring 24 is connected, with the aid of the first pressure plate 16 can be automatically shifted to a defined starting position. The second friction clutch 14 has a second pressure plate 26, which can be displaced axially relative to a second counter-plate 28 to frictionally press a second clutch disc 30 connected non-rotatably to a second transmission input shaft between the second pressure plate 26 and the second counter-plate 28. In the exemplary embodiment illustrated, the first counterplate 18 and the second counterplate 28 are formed by the different axial sides of the common central plate 32. With the second pressure plate 26 and the central plate 32 and / or a clutch cover 34 designed as a leaf spring second return spring 36 is connected, with the aid of the second pressure plate 26 can be automatically shifted to a defined starting position.

In order to be able to axially displace the first pressure plate 16, a first actuating element 38 configured in the manner of a plate spring engages a tie rod 40 firmly connected to the first pressure plate 16. For this purpose, the first actuating element 38 is pivotably mounted on a first embodiment 42 of the clutch cover 34 which defines an annular pivot point in the circumferential direction. When at radially inwardly projecting first spring tongues 44 of the first actuating element 38th engages an actuating force provided by an actuating system, the first actuator 38 can change its conicity and thereby pivoted to the first expression 42, for example, to close the first friction clutch 12, the tie rod 40 and connected to the tie rod 40 first pressure plate 16 on the first Counter plate 18 of the central plate 32 to relocate while pressing the first clutch disc 20 frictionally. In order to be able to displace the second pressure plate 26 axially, a second actuating element 46 designed in the manner of a disc spring engages the second pressure plate 26. For this purpose, the second actuating element 46 is pivotally mounted on a second embodiment 48 of the clutch cover 34 which defines a pivot point which is annular in the circumferential direction and projects from the clutch cover 34 in the opposite direction to the first embodiment 42. If an actuating force provided by an actuating system acts on radially inwardly projecting second spring tongues 50 of the second actuating element 46, the second actuating element 46 can change its conicity and thereby be pivoted on the second embodiment 48, for example to close the second friction clutch 14 second pressure plate 26 on the second counter-plate 28 of the central plate 32 to relocate while compressing the second clutch plate 30 frictionally. In the illustrated embodiment, a plurality of transport locks 52 are integrally formed with the clutch cover 34 and each passed through an opening formed between two first spring tongues 44 of the first actuator 38 through hole 54, as shown in Fig. 2. The transport lock 52 can engage behind a part of the first actuating element 38 and thereby keep the first actuating element 38 just above its installation position during transport.

As shown in FIG. 3, the transport securing devices 52 can each have a web 58 extending in the axial direction, from which a hook 60 protrudes in each case in the tangential direction. The hook 60 can engage behind a part of the first spring tongue 44 of the first actuating element 38. Reference character list double clutch

first friction clutch

second friction clutch

first pressure plate

first counter plate

first clutch disc

driver ring

first return spring

second pressure plate

second counter plate

second clutch disc

Central plate

clutch cover

second return spring

first actuating element

tie rods

first expression

first spring tongue

second actuator

second expression

second spring tongues

transport safety

Through opening

Clutch cover assembly

web

hook

Claims

claims

Clutch cover assembly for a friction clutch (12) for coupling a drive shaft of a motor vehicle engine with at least one transmission input shaft of a motor vehicle transmission, with

a clutch cover (34) for at least partially covering the friction clutch (12) and

a, designed in particular in the manner of a plate spring, actuating element (38) for axially displacing a pressure plate (16) of the friction clutch (12) relative to a counter plate (18) of the friction clutch (12), wherein the clutch cover (34) integral with the Clutch cover (34) running and the actuating element (38) behind tangible transport lock (52).

Clutch cover assembly according to claim 1, characterized in that the actuating element (38) between an assembly position, in which the actuating element (38) on the transport lock (52) in the axial direction is movable past, and an end position, in which the transport lock (52), the actuating element (38) viewed in the axial direction at one of the clutch cover (34) facing away axial side at least partially covered, is rotatable.

Clutch cover assembly according to claim 1 or 2, characterized in that the actuating element (38), in particular between two circumferentially following substantially radially projecting spring tongues (44), a passage opening (54) for passing the transport lock (52).

Clutch cover assembly according to one of claims 1 to 3, characterized in that the transport lock (52) has a substantially extending in the axial direction web (58) and one of the clutch cover (34) pointing away axial side of the web (58) protruding hook (60) for engaging behind the actuating element (38).

5. clutch cover assembly according to claim 4, characterized in that the hook (60) projects substantially in the tangential direction of the web (58).

6. clutch cover assembly according to claim 4 or 5, characterized in that with the web (58) only exactly one hook (60) is connected.

7. clutch cover assembly according to one of claims 4 to 6, characterized in that a plurality of substantially identically shaped transport fuses (52) of the clutch cover (34) are integrally formed, wherein all hooks (60) either in the radial direction or in the tangential direction of the protrude respective web (58).

8. clutch cover assembly according to one of claims 1 to 7, characterized in that a spring element, the actuating element (38) against the transport lock (52) presses, wherein in particular the spring element by a with the clutch cover (34) and the pressure plate (16) associated return spring ( 24) for positioning the pressure plate (16) in a defined starting position in the operating position and / or an adjusting spring of a biased adjusting device for adjusting a wear-related pitch of the pressure plate (16) is formed.

9. clutch cover assembly according to one of claims 1 to 8, characterized in that the clutch cover (34), in particular as a separate Zent rierbolzen configured, substantially in the axial direction protruding Zent rierelemente, wherein the actuating element (38) is centered on the centering. Clutch cover arrangement according to one of claims 1 to 9, characterized in that the clutch cover (34) on one of the actuating element (38) facing away from the axial side protruding further transport safety, the further transport lock a, in particular in the manner of a plate spring ausgestaltetes, further actuating element ( 46) for axially displacing a further pressure plate (26) of a further friction clutch (14) relative to a further counter-plate (28) of the further friction clutch (14) engages behind.