WO2011076171A1

WO2011076171A1 - Engagement system for a clutch

Info

Publication number: WO2011076171A1
Application number: PCT/DE2010/001455
Authority: WO
Inventors: Luben Krahtov; Daniel Bosnjak; Jerome Malitourne
Original assignee: Schaeffler Technologies Gmbh & Co. Kg
Priority date: 2009-12-22
Filing date: 2010-12-13
Publication date: 2011-06-30
Also published as: DE112010004943A5; DE112010004943B4; CN102713328B; CN102713328A; DE102010054301A1

Abstract

The invention relates to an engagement system for a clutch, in particular a dual clutch, comprising at least one engagement lever, which is coupled to an engagement bearing by means of two supports, an actuating element being connected between the engagement lever and the engagement bearing. The invention is characterized in that the supports comprise rolling bodies, which are arranged between the engagement lever and the actuating element.

Description

Engagement system for a clutch

The invention relates to an engagement system for a clutch, with an engagement lever which is coupled via supports and with the interposition of an actuating element with an engagement bearing. The engagement system is particularly useful as Einrücksystem for a dual clutch, with two nested Einrückhebeln, of which at least one is coupled via two supports and with the interposition of an actuating element with its associated engagement bearing.

German Offenlegungsschrift DE 10 2009 011 809 A1 discloses an engagement system for a double clutch with two partial clutches which, for each of the partial clutches, comprises an engagement bearing and a cylindrical actuating element which has two oppositely disposed coupling elements which are designed as supports, wherein the Ends of fork arms of an engagement lever have a contour corresponding to the contour of the support inver- se.

From the German patent application DE 10 2006 043 330 A1 discloses a lever system for actuating a clutch with a lever is known, which is rotatably mounted on one side about a hinge and with the other side in operative connection with a pressing means.

The object of the invention is to improve an engagement system according to the preamble of claim 1, in particular with regard to a play-free mounting of the engagement bearing on or in the engagement lever.

The object is achieved in a clutch engagement system, with an engagement lever which is coupled via bearings and with the interposition of an actuating element with an engagement bearing, characterized in that the supports comprise rolling elements, which are arranged between the engagement lever and the actuating element. The rolling elements allow in a simple manner a defined rolling or rolling movement between the engaging lever and the actuating element. By the rolling elements a positive connection between the engagement bearing and the engagement lever is created, which allows only one direction of movement. A preferred embodiment of the engagement system is characterized in that the rolling elements are held captive on the engagement lever or on the actuating element. This simplifies the installation of the engagement system.

A further preferred embodiment of the engagement system is characterized in that at least one of the rolling elements has the shape of a ball. It can also be performed both balls as balls. The ball is formed, for example, of a ceramic material having a high hardness and a low coefficient of friction.

A further preferred embodiment of the engagement system is characterized in that at least one of the rolling elements has the shape of a cylinder. It can also be designed as a cylinder both rolling elements. The rolling element is formed, for example, from plastic.

A further preferred embodiment of the engagement system is characterized in that at least one of the rolling elements in a first part has the shape of a partial cylinder and in a second part the shape of a partial sphere. It is also possible for both rolling bodies to have the shape of a partial cylinder in a first part and the shape of a partial ball in a second part. The rolling element is formed, for example, from plastic.

A further preferred embodiment of the engagement system is characterized in that one rolling element has the shape of a cylinder and the other rolling elements has the shape of a sphere. By the cylindrical rolling elements, the rolling movement is restricted. Particularly preferably, one rolling element is designed as a ball, while the other rolling element has the shape of a partial cylinder in a first part and the shape of a partial sphere in a second part.

A further preferred embodiment of the engagement system is characterized in that the rolling elements are each arranged between two rolling surfaces whose shape is adapted to the shape of the respective rolling body. The support surfaces are so depending on Wälzkörperausführung spherical or cylindrical or partially spherical or partially cylindrical, in particular hemispherical or semi-cylindrical, executed.

Another preferred embodiment of the engagement system is characterized in that the actuating element and the engagement lever each have two recesses and / or recesses for partially receiving the rolling elements. The recesses are preferably designed as through-holes.

A further preferred embodiment of the engagement system is characterized in that two holding devices are attached to the engagement lever, each holding a rolling element captive on the engagement lever. The rolling elements are preferably held on the engagement lever, that the rolling elements allow a rolling movement or rolling movement of the actuating element relative to the engagement lever, and vice versa.

A further preferred embodiment of the engagement system is characterized in that the holding devices each have a Einklipsbereich, in which the actuating element can be clipped. This simplifies the installation of the engagement system.

According to a further aspect of the invention, the engagement lever is designed as a sheet metal part that is simple and inexpensive to produce. According to another aspect of the invention, the engagement system according to the invention comprises two engagement levers with which two partial clutches of a dual clutch can be actuated. For this purpose, two engagement bearing, which are each actuated by an engagement lever, arranged nested. In this case, both engaging lever can be designed as sheet metal parts and combined with the rolling elements according to the invention. However, it is also possible for only one of the two engaging levers to be designed as a shaped sheet metal part and to be combined with the rolling elements according to the invention. It is also possible to combine a conventional engaging lever with the rolling elements according to the invention.

In the context of the present invention, a rolling body is understood in particular to mean a body which is fixed relative to the engagement lever and on which at least one rolling surface is formed for the actuating element. The rolling element according to the invention may also have a further rolling surface for the engagement lever. The two rolling surfaces can be the same or different. The rolling element can also perform a rolling movement itself, relative to the engaging lever and / or relative to the actuating element.

By holding the respective rolling elements is only captive on the

Holding lever held. Under load, that is, upon actuation of the engagement lever, the rolling element between the engagement lever and the actuating element is clamped. Under Load the rolling elements is positioned in the associated recess or depression, which is provided for this purpose in the engaging lever or the actuating element.

Further advantages, features and details of the invention will become apparent from the following description in which, with reference to the drawings, various embodiments are described in detail. Show it:

Figure 1 is an exploded view of an embodiment of the invention

engagement system;

2 shows a perspective view of a holding device of the engagement system

FIG. 1;

3 shows the holding device of Figure 2 with a rolling element, which is designed as a ball.

FIG. 4 shows a further rolling body with a partial spherical surface and a partial cylindrical surface;

Figure 5 shows an actuating element of the engagement system of Figure 1 in perspective

Presentation and

Figure 6 is a similar view as in Figure 1 with a second engaging lever.

FIG. 1 shows an exploded view of a first exemplary embodiment of the engagement system 1 according to the invention. The engagement system 1 is used to actuate a clutch or a dual clutch of a motor vehicle and comprises an engaging lever 3, which is made in one piece in the illustrated embodiment. The engagement lever 3 comprises an elongated, ring-like lever body 4 with an actuating end 5 and a support end 6.

The engagement lever 3 is preferably designed as a sheet metal part. For stiffening an outer peripheral edge portion of the annular lever body 4 is angled so that it forms a collar. A similar collar is angled inside on the ring-like lever body 4. As a result, the stability and rigidity of the engagement lever 3 can be increased. With its supporting end 6 of the engagement lever 3 is pivotally supported on a support body 8, which is fixedly mounted on a (not shown) clutch bell. For supporting on the support body 8, a recess is preferably formed on the support end 6, whose shape is substantially rectangular and adapted to the shape of the support body 8. At the operating end 5 of the engagement lever 3 engages a (not shown) actuating pin or actuating piston, with which the clutch is actuated via the engagement lever 3. The actuating force can be applied as a compressive force or as a tensile force. A pulling force could also be generated via a cable pull mechanism.

The engagement lever 3 is pivotable between its actuating end 5 and its support end 6 about a transverse axis passing through two coupling portions 11, 12. In the coupling region 11, a rolling element 15 is held captive on the engagement lever 3 with the aid of a holding device 16. In the coupling region 12, a further rolling element 17 is also held captive on the engagement lever 3 by means of a holding device 18.

The rolling elements 15, 17 provide support for an actuating element 20, which is coupled via the rolling elements 15, 17 with the engaging lever 3. The engagement lever 3 comprises in the coupling region 11 a recess 21 which is formed as a spherical cap in the lever and serves to partially receive the rolling element 15, which is designed as a ball. In addition, two depressions or through holes 22, 23 are provided in the coupling region 11, which serve for fastening the holding device 16 to the engaging lever 3.

The actuating element 20, as well as the engaging lever 3, for example, designed as a sheet metal part. In contrast, the holding devices 16 and 18 are preferably designed as plastic parts, in particular injection-molded parts. The actuator 20 includes an actuating flange integrally connected to a support ring 26.

The support ring 26 serves for centering a engagement bearing 28, which is supported in the axial direction on the Betätigungsfiansch 25. The engagement bearing 28 is fastened by means of a fastening ring 29 on the actuating element 20. The actuating element 20 can then be mounted with the engagement bearing 28 fastened thereto, preferably by clipping, to the holding devices 16, 18 of the engagement lever 3. In FIGS. 2 and 3, the holding device 16 is shown in perspective in two different views, in FIG. 2 alone and in FIG. 3 with the rolling element 15 embodied as a ball.

The holding device 16 comprises a holding body 30, from which two fastening elements 31, 32 emanate, which are inserted for fastening the holding device 16 in the depressions or through holes 22, 23 of the engagement lever 3. The holding body 30 further comprises a receiving pocket 34, which serves to position the rolling body 15. The holding device 18 is designed symmetrically to the holding device 16 and comprises a receiving pocket, which serves to position the rolling body 17.

Of the holding body 30 of the holding device 16, a fastening tab 36 is angled, which has a Einklipsbereich 38 for the actuating element 20. In the Einklipsbereich 38, a spring tongue 39 is formed, which is elastically deformable. During assembly, the actuating element 20 is clipped into the opposing Einklipsbereiche 38 of the holding means 16 and 18, which are fixed to the engaging lever 3. In this case, the rolling elements 15 and 17 are arranged between the actuating element 20 and the coupling regions 11, 12 of the engagement lever 3, that they represent support.

In Figure 4, the rolling elements 17 alone is shown enlarged. The rolling element 17 has on one side the shape of a Teiikugel 41 and on the other side the shape of a partial cylinder 42. The part ball 41 is designed as a ball portion and connected by a holding plate 44 in one piece with the sub-cylinder 42, which is designed as a cylindrical portion. The holding plate 44 serves to hold the rolling element 17 captive by partially receiving in the retaining pocket of the holding device 18 on the engaging lever 3.

In Figure 5, the actuator 20 is shown alone in perspective. In the actuating flange 25 diametrically rolling surfaces for the rolling elements 15, 17 are formed. In one of the rolling surfaces, a recess 51 for partially receiving the rolling element 15 is provided, which is designed as a ball. The other rolling surface comprises a recess 52 whose shape is adapted to the shape of the rolling element 17. Preferably, a deformation in the form of a recess is provided radially within the recess 51 and the recess 52, which serves to reinforce the actuator 20 or stiffen. FIG. 6 shows the engagement system 1 from FIG. 1 in an exploded view according to a further exemplary embodiment. In this illustration, it can be seen that the engagement lever 3 has at its support end 6 a substantially rectangular recess 81, the shape of which is adapted to the support body 8. The shape of the support body 8 deviates from a ball and has, for example, the shape of a cuboid 82, which constitutes a hinge-like support for the engagement lever 3. Through the interaction of the cuboid 82 with the recess 81 at the support end 6 of the engagement lever 3, a hinge-like pivoting of the engagement lever 3 relative to the support body 8 is made possible in a simple manner in a limited angular range.

The engagement system 1 illustrated in FIG. 6 comprises, in addition to the engagement lever 3, a second engagement lever 83, which is embodied, for example, as a forged part. Alternatively, however, the second engaging lever 83 could also be designed like the engaging lever 3 as a shaped sheet metal part. The second engaging lever 83 includes an actuating end 85 and a lower end 86. A guide tube 88 extends through a through hole provided in the second engaging lever 83. By means of a connecting element 89, a Veriänge- tion pipe piece 90 is attached to the second engagement lever 83. Via the extension tube piece 90, the second engagement lever 83 cooperates with a second engagement bearing (not shown), which can be arranged within the engagement bearing 28, for example. The two engaging levers 3 and 83 serve to actuate a partial clutch of a double clutch.

LIST OF REFERENCES

engagement system

Engaging lever

lever body

actuating end

supporting

support body

coupling region

rolling elements

holder

rolling elements

holder

actuator

recess

Through Hole

actuating flange

support ring

engagement bearing

fixing ring

holding body

fastener

receiving pocket

mounting tab

Einklipsbereich

spring tongue

partial sphere

partial cylinder

Retaining plate

recess

deepening 81 recess

82 cuboid

83 second engagement lever

85 actuation end

86 lower end

88 guide tube

89 connecting element

90 Extension pipe piece

Claims

claims

1. engagement system for a clutch, in particular a double clutch, with at least one engagement lever (3) which is coupled via two supports and with the interposition of an actuating element (20) with an engagement bearing (28), characterized in that the support rolling elements (15, 17) which are arranged between the engagement lever (3) and the actuating element (20).

2. engagement system according to claim 1, characterized in that the rolling elements

(15,17) are held captive on the engagement lever (3) or on the actuating element (20).

3. engagement system according to one of the preceding claims, characterized in that at least one of the rolling elements (15) has the shape of a ball, or that at least one of the rolling elements has the shape of a cylinder, or that at least one of the rolling elements (17) in a first Part has the shape of a partial cylinder and in a second part the shape of a partial sphere, or that one rolling element has the shape of a cylinder and the other rolling elements in the shape of a sphere.

4. engagement system according to one of the preceding claims, characterized in that the rolling bodies (15,17) are each arranged between two rolling surfaces, whose shape is adapted to the shape of the respective rolling body (15,17).

5. engagement system according to one of the preceding claims, characterized in that the actuating element (20) and the engagement lever (3) each have two recesses (51, 21) and / or recesses (52) for partially receiving the rolling elements (15,17) ,

6. engagement system according to any one of the preceding claims, characterized in that on the engaging lever (3) has two holding means (16,18) are fastened, each holding a rolling body (15,17) captive on the engaging lever (3).

7. engagement system according to claim 6, characterized in that the holding means (16,18) each have a Einklipsbereich (38) into which the actuating element (20) can be clipped.

8. engagement system for use with a dual clutch, with two engagement levers, with which the two partial clutches of the double clutch are actuated, wherein at least one of the engagement lever has the features of one of claims 1 to 7.

9. engagement system according to claim 8, characterized in that the engagement levers are arranged nested in one another, and / or that at least one of the two engagement lever is designed as a sheet metal shaped part.