Slave device for clutch system and clutch system for vehicle

Abstract

The invention relates to a slave device (1) for a clutch system (20) of a motor vehicle, in particular a clutch slave cylinder in the form of a concentric slave cylinder, the slave device comprising: a housing element (2), the housing element having a pressure chamber (3) in the interior of the housing element, an annular gap (4) arranged on the outside of the housing element (2), the annular gap being in fluid communication with the pressure chamber (3). The invention also relates to a clutch system (20) for a vehicle, in particular for a motor vehicle, the clutch system comprising: the slave device (1), a clutch device (21) for connecting an input side (I) of the clutch system (20) to an output side (O) of the clutch system (20), and a transmission housing (22) on the output side (O), the seal (5, 6) of the slave device (1) being placed against the transmission housing (22) in a radial direction (R) so as to seal the annular gap (4) of the slave device (1) in an axial direction (A) and in a radial direction (R).

Description

Technical Field

[0001] The invention relates to a slave device for a clutch system of a motor vehicle, in particular a clutch slave cylinder which is preferably designed as a concentric slave cylinder, and a clutch system for a vehicle, in particular a motor vehicle, having a slave device. Background Art

[0002] In conventional CSC applications or concentric slave cylinder applications, whether for dry or wet clutches, the CSC or its housing is axially screwed to the transmission case.

[0003] Here, the operating medium or fluid is conveyed from the actuation unit or the master device via a so-called whistle arranged on a hole in the housing of the CSC into the pressure chamber of the CSC, so that the operating medium reaches the pressure chamber inside the CSC.

[0004] The above-described type of attachment of the CSC to the transmission housing is time consuming and therefore requires increased assembly effort. Summary of the invention

[0005] The object of the present invention is therefore to specify a slave device for a clutch system of a motor vehicle, in particular a clutch slave cylinder, and a clutch system for a vehicle which can be produced inexpensively and ensure simplified assembly.

[0006] According to the present invention, this object is achieved through the following technical features.

[0007] According to the present invention, in a first aspect of the present invention, a slave device for a clutch system of a motor vehicle, in particular a clutch slave cylinder which is preferably designed as a concentric slave cylinder, comprises:

[0008] a housing element having a pressure chamber in the interior of the housing element,

[0009] In this case, an annular gap is arranged on the outside of the housing element, which annular gap is in fluid communication with the pressure chamber.

[0010] By means of the annular gap, the pressure chamber can be connected in a simple manner at any point on the circumference of the housing element to an inflow which supplies the operating medium from the master to the slave. Thus, for example, an annular piston element relative to the housing element serves to actuate the clutch arrangement. This simplifies assembly, since it is no longer necessary to manually connect the pressure hose to the so-called whistle arranged on the housing element of the slave. The correct arrangement or placement of the pressure hose within the clutch system connecting the master to the slave is also eliminated. This also saves assembly time.

[0011] The annular gap preferably extends on the housing element in the circumferential direction around the outside. In other words, it is preferred that the annular gap is formed by the housing element and extends in a circle around the outside of the housing element in the circumferential direction.

[0012] It is also preferred that the annular gap has a funnel-shaped cross section relative to the axial direction.

[0013] The pressure chamber is preferably arranged at the narrow end of the funnel-shaped configuration of the annular gap, so that fluid can flow from the annular gap into the pressure chamber.

[0014] In the present description, an “axial direction” is preferably understood to mean a direction in which the annular piston element of the slave device can be moved relative to the housing element of the slave device.

[0015] Furthermore, in the present description, the term “circumferential direction” is preferably understood to mean, for example, a direction in which a radial bearing rotates, which direction is aligned with an axis extending in the axial direction.

[0016] At least one seal is advantageously arranged on the outer side of the housing element in order to seal the annular gap and thus seal the output device relative to the transmission housing of the clutch system.

[0017] The at least one seal is preferably designed as an O-ring.

[0018] Furthermore, it is advantageous if the annular gap can be sealed in the axial direction by at least one seal. The at least one seal can also seal in the radial direction. If the at least one seal is placed both on the housing element of the slave and on the transmission housing of the clutch system, it can seal in the axial direction and / or in the radial direction.

[0019] It is also possible to arrange the two seals on the housing element offset in the axial direction relative to the annular gap.

[0020] Furthermore, it can be provided that, viewed in the axial direction, a first seal is arranged in front of the annular gap and a second seal is arranged behind the annular gap. Thus, the annular gap can be sealed relative to the transmission housing of the clutch system.

[0021] The housing element advantageously has at least one receptacle on the outside for each seal, by means of which the axial position of the seal on the housing element of the slave device can be determined.

[0022] Furthermore, it is advantageous if at least one of the receptacles is designed as a pocket in cross section in the axial direction. Thus, the seal can be held in a simple manner in the receptacle on the slave device, particularly during preassembly.

[0023] Furthermore, it is advantageous if the at least one receiving portion comprises two side webs extending outwardly in the radial direction. Thus, the axial position of the seal on the housing element can be predetermined.

[0024] In the present description, the term "radial direction" is preferably understood to mean a direction extending perpendicularly to the axial direction.

[0025] The housing element preferably has a first side wall in the axial direction, which first side wall connects together two side webs forming the at least one receptacle.

[0026] In this case, the first side wall can be interrupted in the axial direction by an annular gap.

[0027] It can also be provided that the annular gap is arranged between two receptacles.

[0028] The housing element preferably has a second side wall and a third side wall.

[0029] In this case, it is preferred that the second side wall and the third side wall are arranged concentrically with respect to one another in order to accommodate the annular piston element and to form a pressure chamber between the housing element and the annular piston element.

[0030] The second side wall is preferably interrupted in the axial direction by an annular gap. Here, it is advantageous if the first side wall and the second side wall are connected to each other.

[0031] Furthermore, partial sections of the first side wall and the second side wall may form a funnel-shaped annular gap.

[0032] Advantageously, the slave device has an annular piston element which is designed to be movable relative to the housing element and is arranged between the second side wall and the third side wall of the housing element.

[0033] Furthermore, it is advantageous if a pressure chamber is formed between the annular piston element and the housing element.

[0034] A second aspect of the present invention comprises a clutch system for a vehicle, in particular an automobile.

[0035] It is explicitly pointed out that the features of the slave device as mentioned in the first aspect of the present invention can be applied to the clutch system individually or in combination with each other.

[0036] In other words, the features related to the slave device mentioned above in the first aspect of the present invention may also be combined with other features in the second aspect of the present invention.

[0037] A clutch system for a vehicle, in particular for a motor vehicle, in particular for a car, preferably comprises:

[0038] - a slave device according to the first aspect,

[0039] a clutch device for connecting an input side of the clutch system to an output side of the clutch system, and

[0040] - the transmission housing on the output side,

[0041] wherein the seal of the slave device bears against the transmission housing in radial direction in order to seal the annular gap of the slave device in axial direction and in radial direction, in particular when interacting with the transmission housing.

[0042] Furthermore, preferably, the transmission housing of the clutch system has an inflow which is fluidically mechanically connected or fluidly communicated with the annular gap of the slave device in order to control the slave device, in particular its annular piston element, using a fluid or an operating medium corresponding to the movement of the fluid transferred through the master device.

[0043] It is also conceivable that the transmission housing of the clutch system and the housing element of the slave are not connected to each other via a fastening device in the axial direction. In other words, it is advantageous if at least one seal of the slave fixes the radial position of the slave relative to the transmission housing of the clutch system.

[0044] The transmission housing preferably has a base element which extends in the radial direction and is arranged opposite the housing element of the slave device, advantageously without the transmission housing and the housing element being fastened to one another.

[0045] Furthermore, it is advantageous if the clutch device has a plate pack and a clutch element for compressing or releasing the plate pack so that the input side can be connected to or disconnected from the output side of the clutch system.

[0046] Furthermore, it can be provided that the clutch device comprises a disk spring element which prestresses the clutch component into a certain position. In this prestressed position, the annular piston element is preferably engaged or the annular piston element is pressed in the direction of the pressure chamber. The pressure chamber of the slave device is therefore not supplied with pressurized fluid, as a result of which the annular piston element can be displaced in the direction of the pressure chamber.

[0047] The disk spring element advantageously fixes the relative axial position of the output device relative to the transmission housing of the clutch system when interacting with the transmission housing.

[0048] The disk spring element can also be arranged between a bearing arrangement and a clutch component of the clutch system.

[0049] The slave device is preferably arranged between the base element and the clutch device.The slave device is thus supported in the axial direction between the base element and the clutch device, as a result of which the slave device is axially fixed.

[0050] Furthermore, it is conceivable that the clutch system is arranged in a wet area of ​​the vehicle, in particular of a hybrid module.

[0051] The clutch system advantageously has a bearing arrangement for actuating the clutch arrangement.

[0052] Advantageously, if the bearing arrangement is arranged on an annular piston element of the slave device to apply a force to a clutch component of the clutch arrangement via the annular piston element, the input side can be connected to the output side via the disc pack, or preferably the input side and the output side can be separated from each other.

[0053] The bearing arrangement for actuating the clutch arrangement preferably comprises a bearing inner ring and a bearing outer ring and rolling elements which are advantageously arranged therebetween.

[0054] The inventive concepts presented above will be further described in other words below.

[0055] For example, when a CSC (or concentric slave cylinder) is used in a wet area of ​​a hybrid module, where the CSC is operated via a pump in the wet area, the CSC is controlled by an operating medium or fluid pressurized by the pump.

[0056] For example, if the pressurized fluid is moved in the direction of the concentric slave cylinder, then for example an annular piston element of the slave device is extended in the direction of the clutch device of the clutch system. In this way, the forces generated by the slave device or the annular piston element moved by it are absorbed by the clutch device. In other words, the wet clutch or the clutch device provides a reaction force to the annular piston element.

[0057] With such an arrangement, only a small installation space is available in which the CSC is connected to the bell housing or the transmission housing in order to support the forces generated by displacing the annular piston element in the direction of the clutch device.

[0058] Specifically, such a specified installation space preferably requires a special connection of the CSC in the bell housing and preferably a new type of supply of the operating medium into the pressure chamber of the CSC or the concentric slave cylinder.

[0059] In this context, the main task is to create a new connection type for the CSC in the bell housing or transmission housing in the wet area of ​​the hybrid module and a new way of supplying the operating medium.

[0060] In short, the solution is to provide the housing element of the slave device with an external pressure chamber or to provide an annular gap extending outside the housing element which is in fluid communication with a pressure chamber inside the housing element of the slave device.

[0061] In this context, it is suggested to connect the CSC and its operating fluid supply via a radial O-ring connection.

[0062] In short, the concept of the invention preferably consists in a simplified manner in the CSC or slave device and its connection to the supply of operating medium / fluid via a radial O-ring connection on the transmission housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The present invention will be described in more detail below using exemplary embodiments in conjunction with the accompanying drawings. The drawings schematically show the following:

[0064] Figure 1 A cross-sectional view in the axial direction of a clutch system according to the invention with a slave device is shown. DETAILED DESCRIPTION

[0065] Figure 1 A cross section in the axial direction A of a clutch system 20 according to the invention with a slave device 1 is shown.

[0066] Figure 1 A clutch system 20 for a vehicle, particularly an automobile, is shown in greater detail and briefly summarized.

[0067] Here, the clutch system 20 includes a slave device 1 (which will be described in more detail below), a clutch device 21 for connecting an input side I of the clutch system 20 to an output side O of the clutch system 20 , and a transmission housing 22 on the output side O.

[0068] Furthermore, the seals 5 , 6 of the slave device 1 are placed in the radial direction R against the transmission housing 22 to seal the annular gap 4 of the slave device 1 in the axial direction A and in the radial direction R.

[0069] To describe it more specifically, Figure 1 A slave device 1 of a clutch system 20 for a motor vehicle is shown, in particular a clutch slave cylinder designed as a concentric slave cylinder.

[0070] The slave device 1 has a housing element 2 , which has a pressure chamber 3 in its interior, and an annular gap 4 , which is arranged on the outside of the housing element 2 and is in fluid communication with the pressure chamber 3 .

[0071] Here, the annular gap 4 extends on the housing element 2 in the circumferential direction U around the outer side and has a funnel-shaped cross section relative to the axial direction A.

[0072] also, Figure 1 It is shown that the pressure chamber 3 is arranged at the narrow end of the funnel-shaped configuration of the annular gap 4 , so that a fluid can flow from the annular gap 4 into the pressure chamber 3 .

[0073] Figure 1 Also shown are two seals 5 , 6 , each designed as an O-ring, which are arranged on the outside of the housing element 2 in order to seal the annular gap 4 and thus the slave device 1 from the transmission housing 22 of the clutch system 20 .

[0074] The two seals 5 , 6 are offset in the axial direction A relative to the annular gap 4 on the housing element 2 , so that the annular gap 4 can be sealed in the axial direction A by the seals 5 , 6 .

[0075] To describe it more precisely, as seen in the axial direction A, the first seal 5 is arranged in front of the annular gap 4 and the second seal 6 is arranged behind the annular gap 5 .

[0076] Furthermore, the housing element 2 has on the outer side a receptacle 7 , 8 per seal 5 , 6 , wherein the respective receptacle 7 , 8 in cross section in the axial direction A is designed as a pocket.

[0077] The pocket or each receptacle 7 , 8 has two side webs 9 , 10 extending in radial direction R outwards.

[0078] Furthermore, the housing element 2 has in the axial direction A a first side wall 11 which connects the two side webs 9 , 10 forming the receptacles 7 , 8 to one another.

[0079] like Figure 1 As shown, the first side wall 11 is interrupted in the axial direction A by an annular gap 4 , wherein the annular gap 4 is arranged between the two receptacles 7 , 8 .

[0080] Furthermore, the housing element 2 has a second side wall 12 and a third side wall 13 which are arranged concentrically with one another to accommodate an annular piston element 14 and form a pressure chamber 3 between the housing element 2 and the annular piston element 14 .

[0081] The second side wall 12 is also interrupted in the axial direction A by the annular gap 4 , wherein partial cross sections of the first side wall 11 and the second side wall 12 in each case form a funnel-shaped annular gap 4 .

[0082] in addition, Figure 1 The slave device 1 is shown to have an annular piston element 14 which is designed to be displaceable relative to the housing element 2 and is arranged between the second side wall 12 and the third side wall 13 of the housing element 2 .

[0083] The pressure chamber 3 is formed between the annular piston element 14 and the housing element 2 .

[0084] With respect to the clutch system 20, it should be noted that the transmission housing 22 of the clutch system 20 has an inflow portion 30, which is fluidically mechanically connected to the annular gap 4 of the slave device 1 so as to use a fluid or an operating medium to move the slave device 1, in particular its annular piston element 14, in correspondence with the fluid displacement through the master device (not shown).

[0085] The transmission housing 22 of the clutch system 20 and the housing element 2 of the slave device 1 are not connected to one another in the axial direction A via a fastening device.

[0086] Figure 1 It is also shown that the transmission housing 22 has a base element 23 which extends in the radial direction R and is arranged opposite the housing element 2 of the slave device 1 without the transmission housing 22 and the housing element 2 being fastened to each other.

[0087] In addition, the clutch device 21 has a disc pack 24 and a clutch member 25 for compressing or releasing the disc pack 24 so that the input side I can be connected to the output side O of the clutch system 20 or disconnected from the output side of the clutch system.

[0088] The clutch device 21 further comprises a disk spring element 26 which prestresses the clutch component 25 into a certain position, wherein the disk spring element 26 is arranged between a bearing device 27 of the clutch system 20 and the clutch component 25 .

[0089] The slave device 1 is arranged between the base element 23 and the clutch arrangement 21 .

[0090] In summary, it can be said that the disc spring element 26 cooperates with the transmission housing 22 such that the relative axial position of the slave device 1 relative to the transmission housing 22 of the clutch system 20 is fixed.

[0091] In contrast, the seals 5 , 6 of the slave device 1 determine the relative radial position of the slave device 1 relative to the transmission housing 22 of the clutch system 20 .

[0092] It should also be noted that the clutch system 20 is arranged in the wet area of ​​the hybrid module.

[0093] from Figure 1 It can also be seen that the clutch system 20 has a bearing arrangement 27 for actuating the clutch device 21 .

[0094] The bearing device 27 is arranged on the annular piston element 14 of the slave device 1 to apply force to the clutch component 25 of the clutch device 21 via the annular piston element 14, so that the input side I can be connected to the output side O via the disk group 24 or the input side I and the output side O can be separated from each other.

[0095] The bearing device 27 has a bearing inner ring 28 and a bearing outer ring 29 as well as rolling bodies arranged therebetween for actuating the clutch device 21 .

[0096] In the following, in other words, Figure 1 .

[0097] The CSC 1 or the slave device 1 is radially centered in the transmission housing 22 and is thereby guided via O-ring connections 5 , 6 or via seals 5 , 6 .

[0098] An axial connection is not necessary, since the CSC 1 is axially prestressed via the clutch component 25 or via the clutch component 25 of the clutch arrangement 21 , and the operating pressure presses the CSC housing or housing element 2 into its seat in the transmission housing 22 .

[0099] The operating medium is fed into the pressure chamber 3 via a bore 30 or via an inflow 30 in the transmission bell housing / transmission housing 22 , which inflow opens into an annular gap 4 extending around the CSC 1 .

[0100] The annular gap 4 is circumferential at the CSC 1 or at the slave device 1 and is closed relative to the transmission housing 22 by O-rings 5 ​​, 6 or seals 5 , 6 .

[0101] Description of Reference Numerals

[0102] 1 slave device 22 transmission housing

[0103] 2 housing element 23 base element

[0104] 3 pressure chambers 24 disc sets

[0105] 4 annular gap 25 clutch parts

[0106] 5 Seal 26 Disc spring element

[0107] 6 seal 27 bearing device

[0108] 7 receiving portion 28 bearing inner ring

[0109] 8 receiving portion 29 bearing outer ring

[0110] 9 side web 30 inflow portion

[0111] 10 Side abdominal plank

[0112] 11 First side wall I Input side

[0113] 12 Second side wall O Output side

[0114] 13 Third side wall

[0115] 14 Annular piston element

[0116] U Circumferential direction

[0117] 20 Clutch system A Axial direction

[0118] 21 Clutch device R radial direction.

Claims

1. A slave device (1) for a clutch system (20) of a motor vehicle, the slave device comprising: a housing element (2) having a pressure chamber (3) in its interior, It is characterized in that - An annular gap (4) is arranged on the outer side of the housing element (2), the annular gap is fluidically connected to the pressure chamber (3), the annular gap (4) extends around the outer side of the housing element (2) in the circumferential direction (U), the annular gap (4) has a funnel-shaped cross-section in the axial direction (A), and the pressure chamber (3) is arranged at the narrow end of the funnel-shaped configuration of the annular gap (4), so that the fluid can flow from the annular gap (4) to the pressure chamber (3).

2. The slave device according to claim 1, wherein at least one seal is arranged on the outer side of the housing element (2) in order to seal the annular gap (4) and thus seal the slave device (1) relative to a transmission housing (22) of a clutch system (20).

3. The slave device according to claim 1, - wherein the annular gap (4) can be sealed in the axial direction (A) by at least one seal.

4. The slave device according to claim 1, - wherein the two seals are offset on the housing element (2) relative to the annular gap (4) in the axial direction (A).

5. The slave device according to claim 1, wherein, viewed in the axial direction (A), a first seal is arranged in front of the annular gap (4) and a second seal is arranged behind the annular gap.

6. A slave device according to any one of the preceding claims 2 to 5, - wherein the housing element (2) has at least one receptacle on the outside for each seal.

7. A slave device according to claim 6, - wherein, The at least one receptacle is designed as a pocket in cross section in the axial direction (A).

8. A slave device according to claim 6, - wherein the at least one receiving portion comprises two side webs (9, 10) extending outwards in a radial direction (R).

9. A slave device according to claim 8, -in, The housing element (2) has a first side wall (11) in the axial direction (A), which connects the two side webs (9, 10) forming the at least one receptacle to one another.

10. A slave device according to claim 9, - wherein the first side wall (11) is interrupted in the axial direction (A) by the annular gap (4).

11. The slave device according to claim 6, - wherein the annular gap (4) is arranged between two receptacles.

12. The slave device according to claim 9, -in, The housing element (2) has a second side wall (12) and a third side wall (13), wherein the second side wall (12) and the third side wall (13) are arranged concentrically with respect to one another in order to accommodate an annular piston element (14) and to form the pressure chamber (3) between the housing element (2) and the annular piston element (14).

13. A slave device according to claim 12, - wherein the second side wall (12) is interrupted in the axial direction (A) by the annular gap (4).

14. The slave device according to claim 12, - wherein partial sections of the first side wall (11) and the second side wall (12) form a funnel-shaped annular gap (4).

15. The slave device according to claim 12, -in, The slave device (1) has an annular piston element (14), which is designed to be displaceable relative to the housing element (2) and is arranged between the second side wall (12) and the third side wall (13) of the housing element (2). - wherein the pressure chamber (3) is formed between the annular piston element (14) and the housing element (2).

16. A clutch system (20) for a vehicle, the clutch system comprising: - A slave device (1) according to any of the preceding claims 1 to 15, - a clutch device (21) for connecting an input side (I) of the clutch system (20) to an output side (O) of the clutch system (20), and a transmission housing (22) which is located on the output side (O), -in, The seal of the slave device (1) is placed against the transmission housing (22) in the radial direction (R) so as to seal the annular gap (4) of the slave device (1) in the axial direction (A) and the radial direction (R).

17. The clutch system according to claim 16, - wherein the transmission housing (22) of the clutch system (20) has an inflow (30) which is fluidically mechanically connected to the annular gap (4) of the slave device (1) in order to move the annular piston element (14) of the slave device using a fluid which corresponds to the fluid displaced by the master device.

18. The clutch system according to claim 16, -in, The transmission housing (22) of the clutch system (20) and the housing element (2) of the slave device (1) are not connected to each other in the axial direction (A) via a fastening device.

19. The clutch system according to claim 16, - wherein the transmission housing (22) has a base element (23) extending in the radial direction (R), and the housing element (2) of the slave device (1) is arranged opposite to the base element, without the transmission housing (22) and the housing element (2) being fastened to each other.

20. A clutch system according to any one of claims 16 to 19, -in, The clutch device (21) has a disc set (24) and a clutch component (25) for compressing or releasing the disc set (24), so that the input side (I) can be connected to the output side (O) of the clutch system (20) or disconnected from the output side of the clutch system.

21. The clutch system according to claim 20, - wherein the clutch device (21) comprises a disc spring element (26) which prestresses the clutch component (25) into a certain position.

22. The clutch system according to claim 21, -in, The disk spring element (26) is arranged between a bearing device (27) of the clutch system (20) and the clutch component (25).

23. The clutch system according to claim 19, -in, The slave device (1) is arranged between the base element (23) and the clutch device (21), - wherein the clutch system (20) is arranged in a wet area of ​​the hybrid module.

24. A clutch system according to any one of claims 16 to 19, - wherein the clutch system (20) has a bearing device (27) for actuating the clutch device (21), -in, The bearing device (27) is arranged on the annular piston element (14) of the slave device (1) to apply a force to the clutch component (25) of the clutch device (21) via the annular piston element (14), so that the input side (I) can be connected to the output side (O) via the disk package (24), -in, The bearing device (27) for actuating the clutch device (21) comprises an inner bearing ring (28) and an outer bearing ring (29).

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