WO2006114075A1

WO2006114075A1 - Arrangement for actuating a clutch of a vehicle

Info

Publication number: WO2006114075A1
Application number: PCT/DE2006/000602
Authority: WO
Inventors: Peter Greb; Lászlo MAN; Oswald Friedmann
Original assignee: Luk Lamellen Und Kupplungsbau Beteiligungs Kg
Priority date: 2005-04-28
Filing date: 2006-04-05
Publication date: 2006-11-02
Also published as: DE112006000878A5; ATE523833T1; EP1877886A1; BRPI0607678A8; CN101167033B; CN101167033A; EP1877886B1; BRPI0607678A2

Abstract

The invention relates to an arrangement for actuating a clutch of a vehicle, wherein a movement of the clutch pedal is transmitted by means of a cinematic system to a clutch operator. The clutch pedal (l) is coupled via the cinematic system to at least one energy accumulator by means of a contact element which can be displaced along a predetermined contour range (5,5') and which is used to adapt the pedal force characteristic line. According to the invention, the contour line can be predefined at least partially by shaping the spring element which is used as an energy accumulator. The invention also relates to an arrangement for actuating the clutch of a vehicle, which comprises a leaf spring which is used as an energy accumulator, whereon the contact element is fixed, and a contour area which is provided on a curve disk and which is rigidly connected to the clutch pedal.

Description

Arrangement for actuating a clutch of a vehicle

The present invention relates to an arrangement for actuating a clutch of a vehicle, in which a movement of a clutch pedal by means of kinematics transferable to a disengaging device, wherein the clutch pedal via the kinematics with at least one energy storage means by a movable at a predetermined contour area contact element for adjusting the Pedal force characteristic is coupled.

For example, from the document DE 101 04 665 A1 a release device for a hydraulically actuated clutch of a motor vehicle is known. The release device has a connected to a hydraulic system energy storage. The energy storage is connected to a pedal via a kinematics, with which an adaptation of the pedal forces can be achieved on the pedal travel. The articulation of the energy storage on the pedal, the pedal force along the second half of the pedal travel can be noticeably reduced in order to overcome the acting in the clutch of the motor vehicle maximum spring force towards the end of the pedal travel easier.

In one embodiment of the known disengaging device, one end of the energy accumulator is connected to a lever on which a rolling curve is provided, on which a roller can run, which is arranged on a cantilever of the clutch pedal. After overcoming a dead center, the roller runs along the rolling curve and experiences an assisting force through the energy store, so that the pedal force to be applied is reduced.

The present invention has for its object to provide an arrangement for actuating a clutch of a vehicle of the type mentioned, which is as simple as possible and allows optimal pedal force adjustment.

This object is achieved by an inventive arrangement for actuating a clutch of a vehicle, wherein a movement of a clutch pedal is transmitted by means of a kinematics on a disengaging device, wherein the clutch pedal via the kinematics with at least one energy storage means by a movable at a predetermined contour region contact element for Adjusting the pedal force characteristic is coupled, wherein the contour region is at least partially formed by the shape of a, provided as energy storage spring element or the like.

Thus, a cost-optimized pedal force characteristic adaptation for clutches can be realized in the simplest manner alone by the choice of a predetermined shape of the spring element, without sacrificing, for example, the functionality of the arrangement. In this way, not only a cost optimization, but also an increase in comfort in the operation of the clutch of a vehicle can be achieved with the inventive arrangement.

In the context of a particularly advantageous embodiment of the present invention may be provided as a spring element a contour leaf spring or the like, at the predetermined contour region as a contact element a roller or the like can be moved along to realize a predetermined pedal force curve on the clutch pedal for an operator. A leaf spring is particularly suitable for use because of its external shape, but other energy storage devices with similar properties can be used. By providing the contour region directly on the spring element no further components are required in the arrangement according to the invention, so that there is a particularly simple and inexpensive construction in the inventive arrangement.

In order to generate a corresponding compensation force on the spring element or on the contour leaf spring, the end facing away from the contact element is fixed or fixed, for example, on the housing or the like. The predetermined by the shape of the leaf spring contour region is usually characterized by a changing contour angle course. From this particular contour angle course ultimately results in each case adapted to the system used pedal force.

In the arrangement according to the invention, a compressive force is generated by the spring element and transmitted according to the contour angle to the contact element or on the roller according to a next development by the characteristic contour angle course. The generated and transmitted compressive force is divided into a radial force component and a tangential force component as a function of the respective contour angle. These force components are transmitted to the clutch pedal by means of kinematics. The kinematics may preferably comprise a rigidly connected to the clutch pedal lever element, wherein the lever element at the end facing away from the clutch pedal, the contact element or the roller. In this way, the compensation force is converted via the kinematics in a compensation torque, since the clutch pedal and the lifting element are preferably pivotally mounted about a common pivot point. Due to the inventive design of the arrangement, the radial force component is supported at the pivot point, wherein the tangential force component causes a compensation torque on the clutch pedal via the lifting element. Another advantage arises when using a leaf spring from the fact that it is not necessary for a leaf spring due to their high surface pressure to harden them specifically by additional expenses, so that the contour area is not subject to premature wear by rolling the contact element.

The object underlying the invention is also achieved by an arrangement for actuating a clutch of a vehicle, in which a movement of a clutch pedal via a kinematics transferable to a disengaging device, wherein the clutch pedal via the kinematics with at least one energy storage means one at a predetermined contour region is coupled along movable contact element for adjusting the pedal force characteristic. According to the invention may be provided as energy storage, a leaf spring or the like, to which the contact element is attached, wherein the contour provided on a cam contour area is fixedly connected to the clutch pedal.

With this further embodiment of the invention, an optimal adaptation of the required pedal force to the clutch characteristic curve can also be made possible. This variant is characterized in particular by the fact that it is particularly cost-effective. In contrast to the variant described above, in this embodiment, the contour region is virtually rigidly connected to the clutch pedal, wherein the contact element is coupled to the leaf spring such that the contact element along the predetermined contour region can be moved. Through this operative connection, a desired adaptation of the pedal force characteristic for actuating the clutch can be realized in the simplest manner. With particular advantage, this type of arrangement allows cost optimization without loss of functionality.

A next development of the present invention provides that one end of the leaf spring is clamped or fastened on the vehicle side, wherein the remote free end of the leaf spring is fastened to the contact element. Usually, the vehicle-mounted connection of the leaf spring is provided on the vehicle frame or on the pedal block in order to be able to safely absorb torques, longitudinal and normal forces which occur when the clutch pedal is actuated.

In order to realize an optimum operative connection between the leaf spring and the predetermined contour region, a roller or the like can preferably be used as the contact element. The roller can roll when pressing the clutch pedal in the simplest way along the predetermined contour area. Characterized in that the roller is acted upon by the spring force of the leaf spring, a compressive force can be applied to the contour region. - A -

In the described embodiment of the present invention, the contour region may be formed as a cam or the like connected rigidly to the clutch pedal. The cam disk preferably has a changing contour angle or contour angle profile. This is necessary to allow a corresponding adjustment of the pedal force characteristic. The cam and the clutch pedal can be pivoted about a common pivot point when operating the clutch of the clutch pedal.

In the arrangement proposed according to the invention, the compressive force can be divided into a radial force component and a tangential force component as a function of the respective contour angle of the cam through the changing contour angle profile so as to realize a predetermined pedal force curve. This can be made possible, in particular, by virtue of the fact that the radial force component is advantageously supported at the common pivot point of the clutch pedal and the cam plate, wherein the tangential force component is transmitted via the kinematics to the clutch pedal pivot point and consequently causes a compensation torque on the clutch pedal to a desired Adaptation of the pedal force characteristic to realize.

The contour angle profile of the cam disc can be calculated and configured from an actual characteristic curve of the clutch, a desired characteristic and geometric data of the leaf spring and the clutch pedal such that the resulting summation torque of the clutch and the compensation arrangement generates a desired desired force characteristic at the base point of the clutch pedal.

In order to realize the desired Pedalkraftkennlinieanpassung in the simplest way, it can be provided according to a next embodiment, that the leaf spring is approximately trapezoidal with an approximately V-shaped cutout or the like. There are also other constructive embodiments of the leaf spring conceivable, however, the trapezoidal configuration has been characterized as particularly optimized voltage, resulting in an optimal material terialausnutzung. As a result, this type of execution is particularly space-and cost-optimized.

In order to realize a roller guide on the leaf spring, the end portions of the leaf spring are each formed as axle mounts for the roller. As a result, additional components for roller bearing can be saved in an advantageous manner. In particular, the end portions of the trapezoidal leaf spring can realize lateral guiding of the roller since the end portions can have correspondingly shaped angled portions. For example, the bends may have suitable recesses or the like as axle have recordings in which the axis of the roller is stored. By this type of recording of the roller longitudinal and transverse forces acting in particular on the roller can be safely absorbed, since the leaf spring is designed to be particularly rigid in these directions.

Preferably, the end portions are bent by more than 90 ° relative to the leaf spring surface. There are also other angular arrangements possible. However, by the preferred angular arrangement, an optimal fixation of the axis of the roller by the bent end portions of the leaf spring and by the utilization of the resulting spring action can be realized. There are also other embodiments conceivable to store and guide the axis of the roller accordingly. In the manner described above results in addition to the cost and space optimization and low installation costs due to the simple structural design.

According to a next development of the present invention, the leaf spring may be integrally formed. Thus, no layered construction is required for the leaf spring. This results in a low number of parts and a minimal hysteresis.

The targeted use can be realized in addition to the cost optimization and functional reliability with minimum space requirement with desired characteristic adjustment. To determine the predetermined curve contour, first the compensation characteristic curve can be formed as a difference from the characteristic curve without compensation arrangement and the desired characteristic curve. Taking into account the given spring and pedal geometries, the curve contour necessary for achieving the desired characteristic curve can then be calculated.

To avoid repetition, reference is also made to the description of the first embodiment of the inventive arrangement. In particular, it is possible to combine the two arrangement variants at least partially with each other.

Hereinafter, the present invention will be explained in more detail with reference to the drawings. Show it:

Figure 1 is a schematic principle view of a first embodiment of the inventive arrangement;

FIG. 2 shows a three-dimensional partial view of the first embodiment of the invention according to the arrangement according to Figure 1;

Figure 3 is a schematic principle view of a second embodiment of the inventive arrangement;

Figure 4 shows a three-dimensional arrangement of a leaf spring of the second embodiment of the arrangement according to the invention

FIG. 1 shows a schematic partial view of a first embodiment of an arrangement according to the invention for actuating a clutch, not shown, of a vehicle.

The arrangement according to the invention therefore comprises a clutch pedal 1, the movements of which are transmitted by means of kinematics to a disengagement device of the clutch (not shown). The kinematics comprises in the illustrated embodiment, the clutch pedal 1 and a lever member 2, which are rigidly pivotable about a common pivot point 3 with each other. When the clutch pedal 1 is stepped on, the pedal angle φ changes.

At the end remote from the clutch pedal 1 end of the lever member 2 is provided as a contact element, a roller 4 with a roller bearing 11. The roller 4 is connected to a predetermined contour region 5 of a trained as a leaf spring 8 energy storage for adjusting the pedal force characteristic in plant. The roller 4 can be moved along the contour region 5, so that are transmitted by the changing contour angle, which is denoted by ξ in Figure 1, to the kinematics or to the clutch pedal 1, wherein the pressure force generated by the leaf spring 8 in dependence of the respective contour angle ξ into a radial force component 6 and a tangential force component 7 are divided.

The radial force component 6 can be supported at the pivot point 3. However, the tangential force component 7 acts on the clutch pedal 1 via the lever member 2 as a compensation torque.

According to the invention, in the first embodiment of the arrangement, the contour region 5 is predetermined by the shape of the leaf spring 8. Here, the roller facing away from the end of the contour leaf spring 8 is fixed, for example, clamped to the vehicle frame. By moving along the contour region 5 roller 4 is by the leaf spring 8 a Compressive force generated, which is transmitted via the respective changing contour angle ξ on the roller 4 and thus on the lever member 2 and the clutch pedal 1.

The contour of the leaf spring 8 causes the above-mentioned division into the individual force components. The contour angle curve of the leaf spring 8 is selected so that the resulting summation torque on the clutch pedal 1 generated by the clutch and the compensation system, the desired desired force characteristic at the base.

Due to the arrangement according to the invention, a high functional reliability can be generated with a small space requirement with the designed as a simple over-center spring leaf spring 8 due to the reduced number of components. For example, this arrangement can be combined with a servo-assisted system. In addition, the leaf spring material allows high surface pressures that make curing of the contour region 5 superfluous. Preferably, the arrangement according to the invention can be used in manual clutches in vehicles with high engine torques. However, other applications are conceivable.

Figure 2 shows the described first embodiment of the inventive arrangement as a three-dimensional representation. It can be seen from this illustration that the contour leaf spring 8 is held in one clamping 9 on one side. The clamping 9 is fixed to a pedal block 10 which is fixedly mounted on the vehicle.

In Fig. 3 is a schematic principle view of a second possible embodiment and a second embodiment of the inventive arrangement is shown.

The second embodiment variant comprises as kinematics a leaf spring 12, which is clamped at one end on the vehicle side. The free end of the leaf spring 12 is connected to a trained as a contact element roller 4 'via a corresponding roller bearing 11'. As a contour region 5 ', a cam disc 13 rigidly connected to the clutch pedal 1' is provided in this embodiment variant. The cam disk 13 has a changing contour angle entlang along its contour area 5 '. The cam plate 13 is pivotally mounted about a pivot point 3 'common to the clutch pedal 1'.

4 shows a three-dimensional view of the leaf spring 12 according to FIG. 3. From this view, it is clear that the leaf spring 12 is approximately trapezoidal in shape as a so-called trapezoidal spring. The leaf spring 12 has an approximately V-shaped cutout 14. Furthermore, the leaf spring 12 has a clamping area 19 with which it can be fastened on the vehicle side. Due to the approximately V-shaped cutout 14 on the leaf spring 12 results in the free End of the leaf spring 12 end portions 15, 15 '. The end portions 15, 15 'serve to support the axle 16 of the roller 4'. In order to ensure optimum storage of the roller 4 ', the end portions 15, 15' each bent bends 17, 17 'or bends, which is an angle α of 80 ° to 100 °, preferably less than or equal to 90 ° between the bottom of the underside Leaf spring 12 and the surface of the end portions 17, 17 'have.

At the bends 17, 17 'are for receiving the axis 16 of the roller 4' corresponding recesses 18, 18 'are provided. In this way, the axis 16 of the roller 4 'can be optimally supported.

The roller 4 'mounted in this manner at the free end of the leaf spring 12 is pressed against the contour region of the cam disc 13 due to the spring force of the leaf spring 12, thereby transmitting a compressive force to the cam disc 13. The contour or the contour angle ξ of the cam disc 13 causes a division of the pressure force into a radial force component 6 'and a tangential force component T. The radial component 6 'is transmitted to the common pivot 3' of the cam 13 and the clutch pedal 1 ', wherein the tangential force component T via the cam 13 transmits a compensation torque to the clutch pedal 1'. Thus, the compensation torque can be used in the inventive arrangement for pedal force characteristic optimization.

LIST OF REFERENCE NUMBERS

, r clutch pedal

Lever element, 3 'fulcrum, 4' roller, 5 'contour area, 6' radial force component, 7 'tangential force component

Contour leaf spring

Clamping 0 Pedal block 1, 11 'Roller bearing 2 Leaf spring 3 Cam 4 V-shaped cutout 5, 15' End section 6 Axle 7, 17 'Angled section 8, 18' Recess 9 Einspannbereich

Claims

claims

1. An arrangement for actuating a clutch of a vehicle, in which a movement of a clutch pedal (1) via a kinematics on a release device is transferable, wherein the clutch pedal (1) via the kinematics with at least one energy storage by means of a predetermined contour region (5) is coupled along movable contact element for adjusting the pedal force characteristic, characterized in that the contour region (5) is predetermined at least in sections by the shape of a spring element provided as energy storage.

2. Arrangement according to claim 1, characterized in that a contoured leaf spring (8) is provided as a spring element, at the predetermined contour region (5) as a contact element, a roller (4) is movable along to realize a predetermined pedal force curve.

3. Arrangement according to claim 2, characterized in that the contour leaf spring (8) at the end remote from the contact element is held stationary in a clamping (9).

4. Arrangement according to claim 2 or 3, characterized in that the contour region (5) of the contour leaf spring (8) has a changing contour angle (ξ).

5. Arrangement according to claim 4, characterized in that by the changing contour angle (ξ) a compressive force on the contact element is transferable, wherein the pressure force in dependence of the respective contour angle (ξ) in a radial force component (6) and a tangential force component ( 7) is divisible.

6. Arrangement according to one of the preceding claims, characterized in that the kinematics with the clutch pedal (1) rigidly connected lever element (2), which on the clutch pedal (1) facing away from the end of the contact element.

7. Arrangement according to claim 6, characterized in that the clutch pedal (1) and the lever element (2) about a common pivot point (3) are pivotally mounted.

8. Arrangement according to claim 7, characterized in that the radial force component at the pivot point (3) can be supported.

9. Arrangement according to one of claims 6 to 8, characterized in that the tangential force component via the lever element (2) transmits a compensation torque to the clutch pedal (1).

10. Arrangement according to one of the preceding claims, characterized in that the contour leaf spring (8) is made of a material having high strength in order to provide a high surface pressure.

11. Arrangement for actuating a clutch of a vehicle, in which a movement of a clutch pedal (1) via a kinematics transferable to a disengaging device, wherein the clutch pedal (1) via the kinematics with at least one energy storage by means of a predetermined contour region (5 '. ) is coupled along movable contact element for adjusting the pedal force characteristic, characterized in that as energy storage a leaf spring (12) is provided, on which the contact element is fixed, and that on a cam (13) provided contour region (5 ') with the clutch pedal (1 ') is firmly connected.

12. The arrangement according to claim 11, characterized in that one end of the leaf spring (12) is clamped on the vehicle side, wherein a free end of the leaf spring (12) is fixed to the contact element.

13. Arrangement according to one of claims 11 or 12, characterized in that the contact element as a roller (4 ') is formed.

14. Arrangement according to claim 13, characterized in that by the spring force of the leaf spring (12) acted on roller (4 '), a compressive force on the predetermined contour region (5') of the cam disc (13) can be applied.

15. Arrangement according to one of claims 11 to 14, characterized in that the cam disc (13) is rigidly connected to the clutch pedal (1 ').

16. Arrangement according to one of claims 11 to 15, characterized in that the clutch pedal (1 ') and the cam disc (13) about a common pivot point (3') are pivotally mounted.

17. Arrangement according to one of claims 11 to 16, characterized in that the cam disc (13) has a changing contour angle (ξ) along the contour region (5 ').

18. Arrangement according to claim 17, characterized in that by the changing contour angle (ξ) a compressive force on the cam disc (13) is transferable, wherein the compressive force in dependence of the respective contour angle (ξ) in a radial force component (6 ') and a tangential force component (7 ') is divisible.

19. The arrangement according to claim 18, characterized in that the radial force component (6 ') at the pivot point (3') can be supported, wherein the tangential force component (7 ') via the cam (13) a compensation torque to the clutch pedal (1). transfers.

20. Arrangement according to one of claims 11 to 19, characterized in that the leaf spring (12) is formed approximately trapezoidal with an approximately V-shaped cutout (14).

21. Arrangement according to claim 20, characterized in that at the by the V-shaped cutout (14) formed end portions (15, 15 ') of the leaf spring (12) each angled portions (17, 17') for receiving the roller (4 ' ) are provided.

22. Arrangement according to claim 21, characterized in that the angled portions (17, 17 ') have recesses (18, 18') for receiving the axle (16) of the roller (4 ').

23. Arrangement according to claim 21 or 22, characterized in that the angled portions (17, 17 ') are bent by an angle (α) of 80 ° to 100 °, preferably less than or equal to 90 ° relative to the lower leaf spring surface.

24. Arrangement according to one of claims 11 to 23, characterized in that the leaf spring (12) is integrally formed.

25. Arrangement for actuating a clutch of a vehicle, in which a pedal travel of a clutch pedal (1) can be transmitted via kinematics to a disengagement device, wherein the clutch pedal (1) interacts with a vehicle-mounted energy store (8, 12), characterized in that a contour region (5, 5 ') is arranged between the clutch pedal (1) and the energy store (8, 12) in such a way that over the pedal travel of the clutch pedal (1) acts a non-linear force on the clutch pedal (1).