DE102015200789A1 - Actuation device for a clutch system - Google Patents

Abstract

The invention relates to an actuator for a clutch system for motor vehicles, with a pedal lever which is pivotally mounted between a rest position and an end position, wherein the pedal lever has an energy store. The integrated into the pedal lever as energy storage spring element rolls off on a solid element, wherein the spring element generates a pedal lever supporting or counteracting force.

Description

The invention relates to an actuator for a clutch system of motor vehicles, with a mounted on a pedal bracket pivotally about an axis of rotation pedal lever with a defined force curve upon actuation of the pedal is formed, wherein the actuating device can be used for both mechanical and electronic clutches.

Over-center springs are known in the art for clutch systems which are integrated into the pedal. However, an over-center spring can not be used for defined force curves or force curves. A disadvantage of this type of coupling aid is the fact that the use of Übertotpunktfedern makes a substantial adaptation of the pedal bracket of the coupling necessary. For example, an additional rotary connection is required. In addition, over-center springs are not suitable to depict a well-defined force curve. For this purpose, suitable energy storage systems, such as C-spring or star pen are still far too expensive.

From the publication DE 10 2005 035 067 A1 is an arrangement for actuating a clutch, in particular a clutch in the drive train of a motor vehicle between the drive motor and the transmission, known with a clutch pedal, which can be brought from an initial position to an end position and acts on a transmission member for actuating the clutch. The arrangement has at least one spring, which overcomes at least one dead center during a movement of the clutch pedal between the initial position and the end position. Thus, in at least a portion of the movement of the clutch pedal between the initial position and the end position a negative restoring force is exerted on the clutch pedal, whereby a more uniform disengaging force is achieved on the clutch pedal.

The publication DE 10 2008 004 151 A1 describes an arrangement for actuating a vehicle clutch, wherein a movement of a rotatably mounted about an axis of a pedal bracket pedal is transferable to a disengaging device and in which a cam roller, which is connected to a designed as a spring element, attached to the pedal energy storage. To achieve optimum pedal force adjustment, the spring element is fixedly supported on the pedal and the cam is rotationally connected to the vehicle frame or vehicle frame fixed Pedalbock.

The DE 10 2008 061 569 A1 discloses a disengagement system for a friction clutch having a disengaging unit acting on the friction clutch to actuate it and an urging unit applying force to the disengaging unit via a power transmission unit transmitted to the applying unit by an operating unit such as a clutch pedal. To compensate for over the actuation of the friction clutch not desired power curve a compensation device is provided which consists of an energy storage, which acts on two rollers that roll along the actuation path on a profile part with two profile characteristics.

The DE 10 2010 054 260 A1 also describes a device for reducing the pedal force in clutch pedals. Here, a coupling aid is achieved by a sleeve is provided which is adapted to be mounted about a rotational axis of a clutch pedal, and spring means which are accommodated in the sleeve, wherein at least one rolling element is mounted within the sleeve, that at a Rolling movement of the at least one rolling element in a first direction along a predetermined path within the sleeve, the spring means are charged.

However, these prior art arrangements are very expensive and expensive to produce. Complex force curves can not be mapped or only with great effort.

The object of the invention is to develop an actuator for a coupling system, which has a simple and inexpensive structural design for storing energy in a pedal block and can depict a well-defined force curve upon actuation of the device, wherein the actuator for both mechanical and electronic clutches can be used.

This object is achieved with the characterizing features of the first protection claim.

Advantageous embodiments emerge from the subclaims.

The invention relates to an actuator for a clutch system for motor vehicles, with a pedal lever which is pivotally mounted between a rest position and a defined end position, wherein the pedal lever has an energy storage. The pedal lever has as an energy storage an integrated arcuate spring element which rolls on a fixed element, wherein the spring element generates a pedal lever supporting or counteracting force. This allows a more comfortable operation of the pedal. The spring element and the pedal lever are preferably made in one piece of plastic, wherein the Spring element is formed on one side of the pedal lever. This allows a cost-effective simple production of the pedal lever with integrated spring element. The spring element has at its end a gate which rolls on the solid element. The distance between the pedal lever with integrated arcuate spring element and the rolling element is selected such that the spring element is under elastic bias.

The scenery has a contour which consists of wave crests and wave troughs, which are guided along the rolling element, wherein depending on the desired operating force, the wave crests and valleys are configured. As a result, a targeted power modulation can be represented, wherein the valleys are never below the bias of the spring element. When approaching the end position, the force to be applied is increased again by means of a wave crest so as to achieve a defined end position.

The rolling element and the gate of the spring element are preferably arranged in a pedal box, wherein the rolling element is fixed to the frame connected to the pedal box and is preferably designed as a rolling bearing. This allows a simple and flexible structure,

The invention will be explained in more detail below using an exemplary embodiment and associated drawings.

Show it:

1 shows the actuator schematically with pedal box,

2 shows the scenery of the spring element on the rolling element in the starting position,

3 shows the scenery of the spring element on the rolling element in position of the pedal power assistance

4 shows the backdrop of the spring element on the rolling element in the final position.

The actuator for a clutch system has according to 1 a pedal lever 1 in the form of a clutch pedal, which is in a pedal box 2 is pivotally mounted between a rest position and an end position. The clutch pedal 1 is one-piece with an integrated spring element 3 formed, which arcuately facing up to the rear of the clutch pedal 1 is formed. The spring element 3 has a backdrop at its end 4 with a contour 5 on which on a firmly connected rolling element 5 is stored, wherein the rolling element 5 and the scenery 4 inside the pedal box 2 lie. The distance between the spring element 3 and the rolling element 4 is chosen so that the spring element 3 is elastically biased. Thus, the spring element is used 3 the energy storage as well as the pedal force assistance when operated. This is about contour 5 of the spring element 3 allows. The contour 6 has a wave-shaped path on which the rolling element, preferably a rolling bearing, is guided. There are wave mountains 6.1 and troughs 6.2 next to each other, where by means of individual design of the wave crests 6.1 and troughs 6.2 a defined force curve can be displayed. This is how we get over the wave mountain 6.1 a counterforce, whereas the wave trough 6.2 due to the spring element 3 provides pedal power assistance. The dashed line 7 shows the ideal line without preload on the pedal 1 , In comparison between wave trough 6.2 and idealized line 7 leads the pedal force support until just before relaxation of the spring element 3 this range is reached before the end position. By means of a wave mountain 6.1 becomes the pedal lever 1 then again biased and guided to its final position.

The rolling process is in the 2 to 4 shown. In 2 is the backdrop 4 of the spring element 3 in the resting position. The rolling element 5 lies on the open edge of the arcuate spring element 3 , The spring element 3 remains in the rest position in a preloaded position at a defined distance from the ideal stress-free line 7 , Depending on the distance between the stress-free line 7 and contour 6 the supporting or counteracting force bigger or smaller. Nourishes the contour 6 the ideal line 7 on, so the pedal force is supported, the distance increases counterforce.

In 3 becomes the spring element 3 shown in supportive position, ie the rolling element is located in a trough 6.2 just before the ideal tension-free line 7 ,

In the final position, which in 4 is shown, the pedal force acts as a counterforce due to the wave crest 6.1 which offers a defined end position as well as dropoff support.

LIST OF REFERENCE NUMBERS

1

 pedal lever

2

 pedal box

3

 spring element

4

 scenery

5

 rolling element

6

 contour

6.1

 Wellenberg

6.2

 trough

7

 Ideal line

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102005035067 A1 [0003]
• DE 102008004151 A1 [0004]
• DE 102008061569 A1 [0005]
• DE 102010054260 A1 [0006]

Claims (10)

Actuation device for a coupling system for motor vehicles, comprising a pedal lever ( 1 ), which is pivotally mounted between a rest position and an end position, wherein the pedal lever ( 1 ) has an energy store, characterized in that a in the pedal lever ( 1 ) as an energy storage integrated spring element ( 3 ) on a fixed element ( 5 ) rolls, wherein the spring element ( 3 ) one the pedal lever ( 1 ) generates supportive or counteracting force. Actuating device according to claim 1, characterized in that the pedal lever ( 1 ) with the spring element ( 3 ) is formed in one piece. Actuating device according to claim 1 and 2, characterized in that the spring element ( 3 ) via an integrated backdrop ( 4 ) on the fixed element ( 5 ) rolls off. Actuating device according to one of claims 1 to 3, characterized in that the pedal lever ( 1 ) with spring element ( 3 ) consists of a plastic. Actuating device according to one of claims 1 to 4, characterized in that the spring element ( 3 ) is elastically biased. Actuating device according to one of claims 1 to 5, characterized in that the backdrop ( 4 ) a contour ( 6 ), by means of wave crests ( 6.1 ) and troughs ( 6.2 ) Any defined force modulation can be displayed. Actuating device according to one of claims 3 to 6, characterized in that the rolling element ( 5 ) and the scenery ( 4 ) of the spring element ( 3 ) in a pedal box ( 2 ) are arranged. Actuating device according to claim 7, characterized in that the rolling element ( 5 ) fixed with a pedal box ( 2 ) connected is. Actuating device according to one of claims 1 to 8, characterized in that the rolling element ( 5 ) is executed in the form of a warehouse. Actuating device according to one of claims 1 to 9, characterized in that the pedal lever ( 1 ) developed a defined counterforce in its final position.

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