DE102016219684A1 - Drag torque support for a bearing of a clutch actuation system - Google Patents

Abstract

The invention relates to an actuating system (1) for engaging and / or disengaging a clutch (10) of a motor vehicle drive train, comprising a housing (2), an actuating element (4) movably received in this housing (2) and cooperating with an actuating bearing (3) ), and a housing (2) in operation relative to a rotatable shaft (5) with at least one bearing ring (7) supporting the support bearing (6), wherein for the rotationally fixed coupling of the bearing ring (7) with the housing (2) a fastener ( 8) is provided, which is rotatably connected both with the bearing ring (7) and with the housing (2); and a clutch (10) for a drive train of a motor vehicle, with such an actuating system (1).

Description

The invention relates to an actuation system / a slave cylinder for engaging and / or disengaging / actuation of a clutch of a motor vehicle drive train (ie a drive train of a motor vehicle, such as a truck, car, bus or agricultural utility vehicle), with a (preferably clutch housing and / or gear housing fixed or gear shaft fixedly arranged) housing, a movably received in this housing and cooperating with an actuating bearing actuator, and a housing in operation relative to a rotatable shaft with at least one / by at least one bearing ring (radially and / or axially) supporting support bearing. The invention also relates to a coupling for a drive train of a motor vehicle, with such an actuating system, in particular for double clutches. The actuating system is carried out in the usual way as a disengagement or an engagement system.

Generic actuation systems are already well known from the prior art. For example, the DE 10 2012 212 307 A1 a release system for actuating a clutch, wherein the release system is in particular in the form of a CSC (Concentric Slave Cylinder / concentric slave cylinder) is formed and at least one, in a housing along a longitudinal axis displaceable, the first piston which acts on an engagement bearing.

In connection with the prior art, it has proved to be disadvantageous that it can come to a drag torque acting on the bearing ring of the support bearing. As a result, in particular at the interface of the support bearing, i. that bearing, which rotatably supports the housing in operation relative to a shaft, such as a transmission input shaft or an output shaft of an internal combustion engine, and the housing may come to relative movements. Premature failure of the actuation system may result.

It is therefore the object of the present invention to remedy these known from the prior art disadvantages and in particular to provide an actuating system for a clutch available, the support and storage should be designed as durable as possible.

This is inventively achieved in that for the rotationally fixed coupling of the bearing ring with the housing, a fastening element is provided, which is rotatably connected both with the bearing ring and with the housing. This means that a separately formed from the housing and the support bearing / bearing ring fastener is additionally provided, which takes over the necessary attachment of the bearing ring on the housing.

The fastener can be optimally matched to the bearing ring and in dependence of the different possible constructions of the housing. As a result, a particularly safe and durable, but also simple, inexpensive recording of Abstützlagers is implemented on the housing.

Further advantageous embodiments are claimed in the subclaims and explained in more detail below.

When the actuator is a hydraulically actuated piston, forming the actuation system as a hydraulic actuation system, the actuation system is particularly suitable for a clutch actuation. It is also advantageous if the actuation system is a disengagement or engagement system and the piston cooperates with a release bearing (in the case of a disengagement system) or an engagement bearing (in the case of an engagement system) as an actuation bearing.

If the fastener is annular, i. designed in the form of a fastening ring / support ring / a mounting sleeve, the fastener is implemented particularly cost.

It is also advantageous if the fastening element consists of a sheet metal material, which is preferably cold forming adapted to the outer contour of the bearing ring and / or the housing. For example, the fastening element is adapted to the outer contour of the bearing ring and the housing by means of a bending and / or a punching process.

The fastener is further configured such that it engages around the bearing ring radially from the outside. As a result, a secure connection between the bearing ring and the housing is implemented during operation.

If the fastener positively, positively and / or materially connected to the bearing ring, the fastener is mounted particularly stable on the bearing ring. The fastener is advantageously by means of a weld, soldering, gluing, knurling and / or a selective pressing (graining) attached to / on the bearing ring.

In this context, it is also expedient if the fastening element in turn is positively, positively and / or materially connected to the housing, such as permanently connected, for example, firmly connected or detachably. It is particularly advantageous here when the fastener is connected to the housing of the actuation system by means of welding, soldering, gluing, riveting and / or screwing. It is also possible to integrate the fastener on the camp.

It is also advantageous if the fastening element for rotationally fixed connection to the housing at least one (preferably at least two) Abstützlasche (-n), which is supported in at least one direction of rotation on the housing to transmit torque (/ are). This makes it possible to attach the support member via a positive connection particularly stable to the housing or support. A detachable connection is possible.

In this context, it is also advantageous if the fastening element for rotatably connected to the housing has at least two Abstützlaschen, wherein a first Abstützlasche is supported in a first rotational direction of the housing to transmit torque and a second Abstützlasche in one, the first direction of rotation opposite, second Direction of rotation is supported on the housing to transmit torque. As a result, the fastening element is formed particularly durable on the part of the housing for supporting the drag torque.

The bearing ring is preferably a bearing outer ring formed as a rolling bearing Abstützlagers. Because thus the fastener is also integrated in a particularly space-saving manner in the actuation system.

Furthermore, the invention also relates to a coupling for a drive train of a motor vehicle, with such an actuating system according to at least one of the aforementioned embodiments.

In other words, an actuating system is thus implemented with a slave cylinder, which is preferably used in a CSC, which is mounted on the transmission input shaft (shaft). According to the invention, an additional element (fastening element) is attached to the bearing (support bearing), which serves as a drag torque support. The support ring (fastener) is mounted on the bearing and secured by tabs (support tabs) on the CSC (slave cylinder). In this way, no dirt can get into the camp (gap between CSC and bearing outer ring).

The invention will now be described in more detail below with reference to figures in order to explain various embodiments in this context.

Show it:

1 a longitudinal sectional view of a coupling according to a preferred embodiment, wherein the coupling comprises an inventive actuating system which is integrated in the region of its slave cylinder in a clutch bell of the clutch, and wherein particularly well the installation position of the housing can be seen,

2 a longitudinal sectional view of the slave cylinder of the actuating system according to the invention, as in 1 is already integrated, with its design being particularly well recognizable as a hydraulic slave cylinder and support on the support bearing,

3 a perspective view of the slave cylinder after 2 in the uncut state, wherein the side facing away from the actuating bearings of the housing, which accommodates the support bearing, can be seen,

4 a detailed representation of the slave cylinder after 2 and 3 in the area of the support bearing, in which the design and arrangement of the fastener is particularly well recognizable, and

5 an end-face detail of the slave cylinder after the 2 and 3 in the region of the support bearing, in which the two, a common collection of the housing in the circumferential direction surrounding support tabs of the fastener are clearly visible.

The figures are merely schematic in nature and are for the sole purpose of understanding the invention. The same elements are provided with the same reference numerals.

In 1 is part of an actuation system according to the invention 1 presented in its exemplary scope. The actuation system 1 is in this context partly already in a clutch 10 a motor vehicle powertrain integrated and thus as a clutch actuation system 1 interacting. The actuation system 1 has a slave cylinder unit / (designed as a pressure cylinder) slave cylinder 14 on, the / in a clutch housing 15 in the form of a clutch bell of the clutch 10 installed / inserted. The coupling housing 15 Here is that area of the clutch 10 , the clutch designed as a friction clutch 10 encloses radially from the outside and protects in operation against external influences. The actuation system 1 usually shows next to the slave cylinder 14 yet another, not shown here for clarity cylinder / impression cylinder, which is designed as a master cylinder and, for example, cooperates with a clutch pedal of the motor vehicle. In Dependence of a hydraulic pressure generated by the master cylinder is the slave cylinder hydraulically connected to the master cylinder 14 operated accordingly.

The closer construction of the actuation system 1 is in the range of the slave cylinder 14 also very good in 2 to recognize. The slave cylinder 14 has a housing 2 on, which is also referred to as a cylinder housing. The housing 2 is thus a first housing of the actuating system 1 , Another (second) housing of the actuation system 1 , which is not shown here for clarity, could be, for example, the housing of the master cylinder. The slave cylinder 14 is further configured as a concentric slave cylinder which is concentric in operation, ie substantially annular, around a shaft 5 arranged around. In particular, the housing 2 designed substantially annular. The housing 2 takes in this embodiment two actuators 4 on, wherein in each case a first actuating element 4a with a turn then also in 1 particularly well recognizable first actuation bearing 3a in the form of a release bearing and a second actuator 4b with a second actuator bearing 3b interacts in the form of a release bearing. The actuators 4a and 4b are essentially the same and equally functional. Each actuator 4a and 4b forms with the housing 2 a hydraulic pressure chamber 16a respectively. 16b out. The actuators 4a and 4b are therefore each as an annular piston 9a respectively. 9b designed. Depending on the in the respective pressure chamber 16a respectively. 16b applied hydraulic pressure is the respective actuator 4a . 4b in the axial direction of the housing 2 postponed. The actuation bearing 3a or 3b is like that with the respective piston 9a or 9b / Actuator 4a or 4b motion coupled, that when moving the first actuating element 4a to a displacement of the first actuating bearing 3a in the same direction and with a displacement of the second actuating element 4b to a displacement of the second actuating bearing 3b coming in the same direction. The first actuation bearing 3a acts on the position (engaged or disengaged position) of a first part clutch and the second actuating bearing 3a to the position (engaged or disengaged position) of a second partial clutch of the coupling designed as a double clutch 10 one.

Thus, the actuation system 1 designed in the usual manner according to a central central release / slave cylinder, which is substantially according to the embodiment of DE 10 2012 212 307 A1 is built and works.

Furthermore, as in the 2 and 3 to recognize, is the housing 2 relative to the wave 5 in the form of a transmission input shaft during operation of the actuation system / clutch via a support bearing 6 radially and axially supported. The support bearing 6 is here in the form of a rolling bearing 13 designed. The support bearing 6 is, in the axial direction of the shaft 5 (corresponds to the axial direction of the coupling 10 ), next to the pressure chambers 16a and 16b and the actuators 4a and 4b arranged.

The support bearing 6 is on one of the actuation bearings 3a and 3b remote axial side of the housing 2 (corresponds to the axial direction of the coupling 10 ) appropriate. Due to the design of the support bearing 6 as a rolling bearing 13 , indicates the support bearing 6 next to a first bearing ring 7 who is here as a bearing outer ring 12 is configured, a second bearing ring 17 on, as a bearing inner ring 18 is configured and thus radially within the first bearing ring 7 / bearing outer ring 12 is arranged. The second bearing ring 17 is relative to the first bearing ring 7 in the usual way by means of several rolling elements 19 roller bearings. Because the rolling bearing 13 is designed as a ball bearing, namely as angular contact ball bearings, are the rolling elements 13 shaped as spheres.

The second bearing ring 17 of the support bearing 6 is designed for non-rotatable connection to the shaft / prepared and in the operation of the clutch 10 also rotatably with the shaft 5 connected. The first bearing ring 7 in contrast, is fixed to the housing (force or frictional engagement), ie fixed or detachable with the housing 2 connected. The housing 2 is how in 1 Also easy to see, in operation in the usual way with the clutch housing 15 and thus also fixed to a transmission housing (since the clutch housing 15 fixedly connected to the transmission housing) of an adjacent to the clutch housing / arranged to the clutch gearbox.

The first bearing ring 7 is, as well as in the detail view in 4 to recognize, with the housing 2 fixed or detachable (force or friction) connected. For non-rotatably connecting the first bearing ring 7 with the housing 2 serves according to the invention a fastener 8th , The fastener 8th is designed annular and thus as a mounting ring / support ring 8th designated. The fastener 8th is designed as a sheet metal component and more preferably formed by both a bending, as well as a stamping process. The fastener 8th has an annular, in the axial direction of the housing 2 extending sleeve area 20 on, the bearing outer ring 12 surrounds / encloses / encompasses from radially outside. The sleeve area 20 is on the first bearing ring 7 attached. In this design serves a non-positive connection for connecting the first bearing ring 7 with the fastener 8th , preferably in the form of a press dressing. Alternatively or additionally, however, it is also implemented in further embodiments, a positive connection, for example. Via a knurling or a selective compression and / or a material connection in the form of a weld, a soldering or bonding, between the first bearing ring 7 and the fastener 8th / the sleeve area 20 provided.

On the side of the case 2 is the fastener 8th as well as in 5 is particularly easy to see by means of two in the axial direction of the sleeve area 20 protruding support tabs 11a and 11b with the housing 2 connected. The housing 2 here has a survey 21 on, the, in the circumferential direction of the support bearing 6 seen support surfaces / a support area for the two support tabs 11a and 11b formed. The assessment 21 This is due to the hydraulic connection of the two pressure chambers 16a and 16b on connecting lines 22 molded to the master cylinder. To a first direction of rotation 4 of the support bearing 6 relative to the housing 2 , lies in the circumferential direction of the support bearing 6 seen a first Abstützlasche 11a at the survey 21 at. In one of these first rotational direction opposite second direction of rotation is in the circumferential direction of the support bearing 6 a second support tab 11b at the survey 21 at. Also in 3 is the attachment of the first support tab 11a and the second Abstützlasche 11b on the peripheral region of the housing 2 / recognizable at the survey. The fastener 8th is thus a positive support of the support tabs 11a and 11b at the survey 21 rotatably with the housing 2 connected. The distance between the mutually facing sides of the support tabs 11a and 11b When viewed in the circumferential direction, this essentially corresponds to the width / extent of the elevation 21 in the circumferential direction, so that the two support tabs 11a and 11b play or play the survey 21 embrace.

Alternatively or in addition to this positive connection between the fastener 8th and the housing 2 , It is implemented in further embodiments, the fastener 8th cohesively and / or non-positively with the housing 2 connect to. As cohesive connection here again an adhesive, welding, or solder joints is possible. Also riveting or screwing the fastener 8th with the housing 2 , Thus, a non-positive and positive connection between the fastener 8th and the housing 2 to implement is conceivable.

In 4 is then again the attachment of the second Abstützlasche 11b at the survey 21 to recognize. In this case, both the first and the second Abstützlasche extends 11a and 11b not only purely in the axial direction, but also somewhat in the radial direction of the support bearing 6 outward.

In other words, the object of the invention is achieved by an additional element (fastener 8th ) in stock (support bearing 6 ) is attached, the by positive engagement (support tabs 2 ) the moment at the CSC 14 supported. The attachment between bearings 6 and support (fastener 8th ) is preferably made possible by traction. The support tabs 11a and 11b can be varied in number. Furthermore, the attachment between bearings 6 and support optionally by welding, gluing, soldering, knurling or selective pressing (graining) done. The positive connection (support tabs 11a and 11b ) to the CSC 14 can optionally be performed by welding, soldering, gluing, riveting or screwing. The complete element 8th can also be directly in stock 6 to get integrated.

LIST OF REFERENCE NUMBERS

1

 actuating system

2

 casing

3

 operation seat

3a

 first actuation bearing

3b

 second actuation bearing

4

 actuator

4a

 first actuating element

4b

 second actuator

5

 wave

6

 support bearing

7

 Bearing ring / first bearing ring

8th

 fastener

9

 piston

9a

 first piston

9b

 second piston

10

 clutch

11a

 first support tab

11b

 second support tab

12

 Bearing outer ring

13

 roller bearing

14

 slave cylinder

15

 clutch housing

16a

 first pressure chamber

16b

 second pressure chamber

17

 second bearing ring

18

 Bearing inner ring

19

 rolling elements

20

 sleeve region

21

 survey

22

 connecting 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 102012212307 A1 [0002, 0029]

Claims (10)

Actuation system ( 1 ) for engaging and / or disengaging a clutch ( 10 ) of a motor vehicle drive train, with a housing ( 2 ), one in this housing ( 2 ) movably received and with an actuating bearing ( 3 ) cooperating actuator ( 4 ), as well as the housing ( 2 ) in operation relative to a rotatable shaft ( 5 ) with at least one bearing ring ( 7 ) supporting support bearings ( 6 ), characterized in that for the rotationally fixed coupling of the bearing ring ( 7 ) with the housing ( 2 ) a fastener ( 8th ) provided with both the bearing ring ( 7 ) as well as with the housing ( 2 ) is rotatably connected. Actuation system ( 1 ) according to claim 1, characterized in that the actuating element ( 4 ) a hydraulically actuated piston ( 9 ), forming the actuating system ( 1 ) as an actuation system. Actuation system ( 1 ) according to claim 1 or 2, characterized in that the fastening element ( 8th ) is designed annular. Actuation system ( 1 ) according to one of claims 1 to 3, characterized in that the fastening element ( 8th ) the bearing ring ( 7 ) surrounds radially from the outside. Actuation system ( 1 ) according to one of claims 1 to 4, characterized in that the fastening element ( 8th ) positively, positively and / or cohesively with the bearing ring ( 7 ) connected is. Actuation system ( 1 ) According to one of claims 1 to 5, characterized in that the fastening element ( 8th ) positively, positively and / or cohesively with the housing ( 2 ) connected is. Actuation system ( 1 ) according to one of claims 1 to 6, characterized in that the fastening element ( 8th ) for non-rotatable connection with the housing ( 2 ) at least one Abstützlasche ( 11a . 11b ) which in at least one direction of rotation on the housing ( 2 ) is supported torque transmitting. Actuation system ( 1 ) according to claim 7, characterized in that the fastening element ( 8th ) for non-rotatable connection with the housing ( 2 ) at least two support tabs ( 11a . 11b ), wherein a first support tab ( 11a ) in a first direction of rotation on the housing ( 2 ) is supported torque transmitting and a second Abstützlasche ( 11b ) in a, the first rotational direction opposite, second direction of rotation of the housing ( 2 ) is supported torque transmitting. Actuation system ( 1 ) according to one of claims 1 to 8, characterized in that the bearing ring ( 7 ) a bearing outer ring ( 12 ) of the rolling bearing ( 13 ) trained Abstützlagers ( 6 ). Clutch ( 10 ) for a drive train of a motor vehicle, with an actuation system ( 1 ) according to one of claims 1 to 9.

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