DE102010020332A1 - Disengager i.e. central disengager, for use in hydraulic clutch actuator of drive train of motor vehicle, has torque support engaging into bearing fixed in housing, confinedly movable in radial direction and fixable - Google Patents

Abstract

The disengager has a torque support (21) engaging into a bearing (22) fixed in a housing. The support is mounted in a tangential direction around a longitudinal axis (23) against twisting around the axis. The support is confinedly movable in a radial direction and fixable. A bearing arm radially and outwardly extends from a bearing carrier (24) of the torque support. The bearing arm is clamped in a support element such that the bearing carrier confinedly moves in a radial direction during operation. A spring device e.g. leaf spring, loads the bearing arm in the tangential direction.

Description

The The invention relates to a releaser with a slave cylinder and with a torque support that fits into a housing Bearing engages the torque support in tangential Direction about a longitudinal axis against rotation about the Longitudinal axis supports or stores. The invention further relates to a powertrain of a motor vehicle with a drive unit driven by a clutch can be coupled with a transmission, with a previously described the Releaser of the clutch, in particular the slave cylinder of the releaser, via a bearing on a clutch cover is supported or stored.

From the DE 101 38 722 A1 is a clutch cover fixed release for a friction clutch in a motor vehicle known. The actuating system for the clutch comprises a master cylinder, a pressure line and a slave cylinder, wherein a pressure built up in the master cylinder when the clutch pedal is depressed is passed via the pressure line through a hydraulic fluid to the slave cylinder.

It are known central slave cylinders (Concentric Slave Cylinder, CSC), which carried out clutch-like as in the above-mentioned prior art can be, d. H. the support forces the slave cylinder are through the clutch housing, for example through the clutch cover, added. However, this support is usually such that the slave cylinder is still around the clutch axis can turn. To limit this possibility of movement, it is known, the slave cylinder fixed to the housing in the circumferential direction support. In this case, the nozzle for connecting the pressure line as torque support for the slave cylinder be used. Such a torque support has However, proved to be disadvantageous because the inclusion of the neck in a housing-fixed bearing over the life of the Clutch had an increasing game. Likewise, resonances can occur.

A perfectly firm storage is also undesirable since the bearing for the torque support at a Blocking the degree of freedom of movement in the circumferential direction of a movement in the axial direction, d. H. in the direction of the longitudinal axis of Clutch, and in the radial direction should allow to pass through the Crankshaft caused vibration movements not with an additional constraint to act on.

A The object of the invention is known from the prior art To improve clutches for clutches in such a way that a reliable and durable torque support the releaser is guaranteed.

The Task is at a preferably hydraulic, as a releaser trained slave cylinder and with a torque support, which engages in a housing-fixed bearing, the torque support in the tangential direction about a longitudinal axis against rotation supports or stores around the longitudinal axis, solved that the torque support limited movable and fixable in the radial direction. The releaser is preferably part of a drive train, in particular for a motor vehicle, with a rotationally connected to the drive unit connected coupling, this means that a coupling housing the clutch with a drive unit of the motor vehicle rotationally connected is. The drive unit may be an internal combustion engine or an electric machine. The releaser is preferably a central release. The longitudinal axis of the releaser or the coupling is preferably a longitudinal axis a drive or an output shaft of the clutch. The inventive Storage takes place in the circumferential direction to the longitudinal axis, that is tangential.

at the well-known constructions of top-solid release The two bearings used can not be free Center the axis of rotation of the coupling. The bearings are for example centered in a pot connected to the clutch cover. As a result, the lid-firm releaser movements imposed on the clutch cover. The cover-resistant release does not turn with the clutch. The resulting drag torque the two bearings is preferably by the torque support on the gear housing, in particular a bell housing, supported. Due to tolerances on the coupling can imposed a revolving movement on the central release mechanism become. By the torque support according to the invention is made possible in a simple way that the Bearings, in particular a release bearing and another bearing for the clutch cover, independent of the clutch cover can center on the axis of rotation of the coupling. Thereby can movements in the hydraulic connection and the drag torque support or torque support can be minimized.

A preferred embodiment of the releaser is characterized in that the torque support comprises a bearing support from which a bearing arm extends radially outward, which is clamped in a support member so that the bearing support can move in operation in the radial direction limited. The movement of the bearing carrier can both in the radial direction radially outward as well as radially inward. This makes it possible that when occurring during operation load changes movements of the bearing support in opposite directions can be compensated in a simple manner. The bearing arm is preferably clamped with its free end in the support element.

One Another preferred embodiment of the releaser is characterized in that the bearing arm by at least one Spring device is acted upon in the tangential direction. The spring device serves to pinch the bearing arm in the support so or clamp, that on the one hand during operation occurring drag torques safely supported and on the other hand, a movement the bearing carrier, in particular the bearing arm, in radial Direction is possible.

One Another preferred embodiment of the releaser is characterized in that the bearing arm by at least one Frictional element is acted upon in the tangential direction. By the Friction element is at a radial movement of the bearing carrier, in particular of the bearing arm, a frictional force opposite to the movement generated.

One Another preferred embodiment of the releaser Is characterized in that the friction element by the spring device against the bearing arm is biased. The biasing force of the spring device is preferably so large that occurring during operation drag torques safely supported by the spring device in the tangential direction become. About the size of the preload force can be the size of the frictional force during a movement the bearing carrier, in particular the bearing arm, in radial Direction. About the spring device can the bearing arm, which can also be referred to as a lever arm, be loaded with a defined force for moment support.

One Another preferred embodiment of the releaser is characterized in that the friction element on a slider is provided, which is movable in the tangential direction in the support element is guided. For guidance, the support element preferably a slot on which is in the tangential direction extends. Due to the limited extent of the slot in the tangential direction the movement of the slider can be restricted.

One Another preferred embodiment of the releaser is characterized in that the spring device designed as a helical compression spring is biased against the slider. The helical compression spring is preferably in the tangential direction between the slider and clamped the support element.

One Another preferred embodiment of the releaser is characterized in that the slide by a blocking element can be locked at a distance from the bearing arm. The blocking element is used to lock the slider so before mounting the bearing arm that the bearing carrier with the bearing arm with low assembly forces can be mounted. The blocking element is preferably as a blocking plate executed.

One Another preferred embodiment of the releaser is characterized in that the spring means as a leaf spring is executed. The leaf spring may partially be a substantially have zigzag shape and is preferably with one end biased against the bearing arm. The other end of the Leaf spring is preferably attached to the support element or supported.

One Another preferred embodiment of the releaser is characterized in that the leaf spring with one end through the slider is guided on the support element. The guided end of the leaf spring is direct or indirect, preferably with the interposition of a slide, against the Bearing arm biased.

One Another preferred embodiment of the releaser is characterized in that at the guided end the leaf spring or on the slider a friction element is mounted. The friction element arrives in the clamped state of the bearing arm this to the plant.

One Another preferred embodiment of the releaser is characterized in that the guided end of Leaf spring with distance to the bearing arm on a nose lockable is, which is bent out of the leaf spring. That provides the advantage that the locking device is integrated in the leaf spring. Thereby additional components can be omitted.

One Another preferred embodiment of the releaser is characterized in that the support element a Long hole comprises, which extends in the tangential direction. The Slot is used to guide the slider and / or the spring device. The expan tion of the slot in the tangential direction is preferably slightly larger than the desired movement the slider or the spring device in the tangential direction.

Another preferred embodiment of the releaser is characterized in that the support element is a U-shaped support plate includes. The U-shaped support plate preferably comprises a base in which the slot can be recessed and are angled from the two legs. Between the two legs of the bearing arm is clamped by means of the spring device.

One Another preferred embodiment of the releaser is characterized in that the support element a Having friction lining. The friction lining is preferably on the inside of a leg attached to the support element. On the friction lining comes the bearing arm in the clamped state to the plant.

The invention further relates to the drive train of a motor vehicle, with a drive unit, for example an internal combustion engine or an electric machine, which is drivingly coupled to a transmission by a clutch. The releaser of the clutch, in particular the slave cylinder, which is preferably designed as a central release, is preferably supported or mounted on a clutch cover via a bearing. Therefore, the release is also referred to as cover-resistant release. A cover-resistant or fixed housing release has the advantage that forces on the crankshaft and in particular forces are avoided on a thrust bearing of the crankshaft. In connection with the invention provides a housing-fixed release, as for example in the German Offenlegungsschrift DE 101 38 722 A1 is described, the advantage that the resulting during operation of the releaser forces can be largely absorbed within the clutch.

One preferred embodiment of the drive train is characterized in that the supporting element on a Gear bell is attached. As a bell housing is a housing part referred to, in which the coupling is arranged and therefore also can be referred to as a clutch bell. The attachment of the Supporting the bell housing can by a positive Connection, for example by rivets or screws, or one cohesive connection, for example by gluing or Welding done.

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

1 a schematic representation of an example of a hydraulic power transmission system, in which an inventive release mechanism can be used;

2 a perspective view of a torque support with a bearing support which is clamped in a support member;

3 a perspective view of the torque support 2 in section through the bearing carrier;

4 the support element with the bearing carrier and a slide in the locked state in section;

5 the support member with the bearing and the slider in the locked state in plan view;

6 the same view as in 4 in the clamped state;

7 the same view as in 5 in the clamped state;

8th a torque support according to another embodiment with a bearing carrier and a spring device in plan view;

9 the spring device off 8th in the locked state;

10 the spring device off 9 in the relaxed state in front view;

11 a perspective view of the relaxed spring device 10 ;

12 an enlarged view of 11 from a different angle and

13 an enlarged view 8th with the spring device in the locked state.

In the 1 an example of a hydraulic power transmission system is shown in which an inventive disengagement is used. The hydraulic power transmission system is a hydraulic clutch actuator 1 for a motor vehicle. The clutch operation 1 includes a master cylinder 2 by a hydraulic pressure line 3 with a slave cylinder 4 is in fluid communication. The slave cylinder 4 is designed as a central annular slave cylinder (CSC). In an annular slave cylinder housing 5 is an annular slave cylinder piston 6 stored. The annular slave cylinder 4 and the annular slave cylinder piston 6 close a turn annular pressure chamber 7 one. The slave cylinder 4 is about a release bearing 8th stored and operated a disc spring 9 , The plate spring 9 serves to actuate a clutch 10 ,

This clutch 10 includes next to the slave cylinder 4 , the slave cylinder housing 5 , the slave cylinder piston 6 , the pressure room 7 , the release bearing 8th and the plate spring 9 another printing plate 11 , a counter pressure plate 12 , a clutch disc 13 and a clutch cover 26 , The slave cylinder 4 , which is also referred to as Zentralausrücker, is through another camp 28 on the clutch cover 26 supported or stored. Therefore one speaks also of a cover-firm Zentralausrücker 4 ,

The plate spring 9 is biased so that these in biasing the pressure plate 11 on the counter pressure plate 12 presses while the non-rotatably connected to a transmission input shaft clutch disc 13 between the pressure plate 11 and the counterpressure plate 12 clamps. These are the pressure plate 11 and the counterpressure plate 12 rotatably connected to a crankshaft of an internal combustion engine, not shown here as drive unit of a motor vehicle. When pressurizing the slave cylinder 4 is therefore the diaphragm spring 9 moved so that they counter to their biasing direction, the contact pressure of the printing plate 11 in the direction of the pressure plate 12 reduces and thus a frictional connection between the clutch disc 13 on the one hand and the pressure plate 11 and the counterpressure plate 12 on the other hand solves

The master cylinder 2 of the 1 includes a master cylinder piston 14 that by means of a clutch pedal 15 over a push rod 16 is pressed. A master cylinder housing 17 of the master cylinder 2 and the master cylinder piston arranged movably therein 14 close a pressure chamber 18 one. In pressureless systems is with the pressure chamber 18 a back-up tank 19 hydraulically connected. One in the pressure line 3 arranged hydraulic valve 20 serves to quick return movements of the clutch pedal 15 in their effect on the hydraulic clutch actuation 1 to limit. As a result, high Einkuppelgeschwindigkeiten when operating the clutch 10 avoided.

According to the invention, the hydraulic clutch actuation 1 with the clutch 10 now extended so that the slave cylinder 4 , ie the Zentralausrücker, with a bearing carrier 24 comprehensive torque support 21 which is added to a warehouse 22 intervenes. The bearing carrier 24 is through the warehouse 22 on a gear housing part 25 supported, also as a gear bell 25 referred to as.

Like all other parts of the hydraulic clutch control 1 also are the torque support 21 and the camp 22 shown here only very schematically. The warehouse 22 serves to the torque support 21 optionally biased in a tangential direction about a longitudinal axis 23 the clutch 10 if necessary prestressed store. The optionally preloaded bearing of the torque support 21 in the warehouse 22 is explained in more detail below in connection with the further figures, wherein various embodiments of inventive bearing 22 and torque supports 21 to be shown.

In the 2 to 7 is a bearing carrier 34 with a circular disk-shaped base body 35 presented in different views and states. The main body 35 has a peripheral edge outside 36 on. From the main body 35 extends a bearing arm 38 radially outward. A free end 40 of the bearing arm 38 is in a support element 42 trapped. The bearing carrier 34 is like the bearing carrier 24 in 1 is indicated on the slave cylinder housing 5 attached. The support element 42 is how in 1 at 22 indicated on the gear bell 25 attached.

The support element 42 includes a support plate 44 with a base 45 , from the two thighs 46 . 47 are angled. In the base 45 of the support plate 44 is a slot 48 recessed, which, based on the longitudinal axis 23 in 1 , extends in the tangential direction. In the slot 48 is a slider 50 slidably guided in the tangential direction.

In the tangential direction between the slider 50 and the thigh 47 of the support plate 44 is a spring device 52 in the form of a helical compression spring 54 clamped. On the spring device 52 opposite side of the slider 50 is a friction element 55 in the form of a friction lining on the slider 50 appropriate. Another friction element in the form of a friction lining 56 is inside the thigh 46 the support element 42 or the support plate 44 appropriate.

The free end 40 of the bearing arm 38 of the bearing carrier 34 is in the tangential direction between the two friction elements 55 . 56 clamped and by the biasing force of the spring device 52 acted upon in the tangential direction.

For assembly purposes, the slider 50 with the help of a blocking element 60 be locked so that the friction lining 55 of the slider 50 how to get into the 2 to 5 looks, from the free end 40 of the bearing arm 38 is spaced. When locked, the slider is located 50 like that on a nose 62 a locking plate 61 on that the spring device 52 is compressed. In this condition, the bearing carrier 44 with the bearing arm 38 in a simple manner in the support element 42 to be assembled. During or after assembly, the lock plate 61 of the blocking element 60 be easily moved or deformed so that the nose 62 the slider 50 releases. In the 6 and 7 is the unlocked state of the slider 50 shown in which the free end 40 the bearing arm between the two friction linings 55 . 56 through the spring device 52 is clamped in the tangential direction.

In the 8th and 13 is a bearing carrier 74 Simplified shown, the same or similar to the bearing carrier in the 1 and 2 to 7 is executed. The bearing carrier 74 has a radially outwardly extending bearing arm 78 on, whose free end 80 in a support element 82 is clamped, which, in a similar manner as in the previous embodiment as a support plate 84 with a base 85 is executed, from the two legs 86 . 87 are angled. The base 85 of the support plate 84 includes a slot 88 that extends in the tangential direction. In the slot 88 is as through the sectional view 105 in 8th implied is a slider 90 guided in the tangential direction movable back and forth. On the slider 90 is an end 91 a spring device 92 on, as a leaf spring 94 is executed. The leaf spring 94 is in the tangential direction between the leg 86 the support element 82 and the slider 90 clamped. On the spring device 92 opposite side of the slider 90 is a friction element 95 in the form of a friction lining on the slider 90 appropriate. Another friction element in the form of a friction lining 96 is on the thigh 87 the support element 82 appropriate.

in the 8th shown clamped state is the free end 80 of the bearing arm 78 between the two friction linings 95 and 96 clamped and in the tangential direction by the biasing force of the leaf spring 94 applied. In 13 is the slider 90 with the friction lining 95 shown in the locked state. In the locked state is the friction lining 95 from the free end 80 of the bearing arm 78 spaced. The lock is easily accessible through a nose 102 reached out of the leaf spring 94 even bent out. On this nose 102 lies in the locked state of the slide 90 the end 91 the leaf spring 94 at.

In the 9 to 12 is the leaf spring 94 shown alone in different states and views. In 9 is the locked state of the leaf spring 94 shown. In the locked state, the free end can 91 the leaf spring 94 not in the direction of an arrow 108 move. To release the lock is a tab 110 the leaf spring 94 in the direction of another arrow 109 emotional. In the 10 to 12 is the relaxed state of the leaf spring 94 shown in different views. In 13 in which the locked state of the leaf spring 94 is shown, is the tab 110 pulled through in the locked state and shown in dashed lines in the dissolved state. In the locked state of the leaf spring 94 can the bearing carrier 74 with the bearing arm 78 be mounted in a simple manner.

When mounting can with the bearing arm 78 , which is also referred to as a lever arm, the bearing carrier 74 over a slope on the leaf spring 94 , especially at the tab 110 , the nose 102 from the end 91 the leaf spring 94 be solved. This may result in the locked state with the end 91 on the nose 102 unhooked leaf spring from the locked state, so that they relax, as you in 8th sees the slider 90 with the friction lining 95 against the free end 80 of the bearing arm 78 suppressed.

1

clutch Control

2

Master cylinder

3

pressure line

4

slave cylinder

5

Slave cylinder housing

6

Slave cylinder piston

7

pressure chamber

8th

release bearing

9

Belleville spring

10

clutch

11

printing plate

12

Platen

13

clutch disc

14

Master cylinder piston

15

clutch pedal

16

pushrod

17

Master cylinder housing

18

pressure chamber

19

An expansion reservoir

20

hydraulic Valve

21

torque support

22

camp

23

longitudinal axis

24

bearing bracket

25

transmission bell

26

clutch cover

28

camp

34

bearing bracket

35

body

36

circumferential edge

38

bearing arm

40

Free The End

42

supporting

44

gusset

45

Base

46

leg

47

leg

48

Long hole

50

pusher

52

spring means

54

Helical compression spring

55

friction

56

friction

60

blocking element

61

locking plate

62

nose

74

bearing bracket

78

bearing arm

80

Free The End

82

supporting

84

gusset

85

Base

86

leg

87

leg

88

Long hole

90

pusher

91

The End

92

spring means

94

leaf spring

95

friction lining

96

friction lining

102

nose

105

sectional view

108

arrow

109

arrow

110

flap

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10138722 A1 [0002, 0022]

Claims (10)

Releaser with a slave cylinder ( 4 ) and with a torque support ( 21 ) stored in a fixed housing ( 22 ) engages the torque support ( 21 ) in a tangential direction about a longitudinal axis ( 23 ) against rotation about the longitudinal axis ( 23 ) supports or supports, characterized in that the torque support ( 21 ) Is limited movable and fixable in the radial direction. Relay according to claim 1, characterized in that the torque support ( 21 ) a bearing carrier ( 24 ; 34 ; 74 ), from which a bearing arm ( 38 ; 78 ) extends radially outwardly, in a support element ( 42 ; 82 ) is clamped so that the bearing carrier ( 24 ; 34 ; 74 ) can move limited in operation in the radial direction. Disconnector according to claim 2, characterized in that the bearing arm ( 38 ; 78 ) by at least one spring device ( 52 ; 92 ) is acted upon in the tangential direction. Release device according to claim 3, characterized in that the bearing arm ( 38 ; 78 ) by at least one friction element ( 55 . 56 ; 95 . 96 ) is acted upon in the tangential direction. Release device according to claim 4, characterized in that the friction element ( 55 . 56 ; 95 . 96 ) by the spring device ( 52 ; 92 ) against the bearing arm ( 38 ; 78 ) is biased. Release device according to claim 5, characterized in that the friction element ( 55 . 56 ; 95 . 96 ) on a slide ( 50 ; 90 ) is provided, which in the tangential direction movable in the support element ( 42 ; 82 ) is guided. Release device according to claim 6, characterized in that the spring device ( 52 ) as a helical compression spring ( 54 ) is executed, which against the slide ( 50 ) is biased. Release device according to claim 7, characterized in that the slide ( 50 ) by a blocking element ( 60 ) with distance to the bearing arm ( 38 ) is lockable. Release device according to one of claims 3 to 6, characterized in that the spring device ( 92 ) as a leaf spring ( 94 ) is executed. Release according to claim 9, characterized in that the leaf spring ( 94 ) with one end ( 91 ) through the slider ( 90 ) on the support element ( 82 ) is guided.