Actuating device for a clutch device, clutch device having such an actuating device, method for manufacturing such an actuating device

Abstract

The invention relates to a hydraulic actuating piston (24) for a clutch device, having an actuating piston (24), a piston chamber (76) corresponding to the actuating piston, and a supply chamber (78) arranged further inwards than the piston chamber (76) in a radial direction (10) and via which the piston chamber (76) can be supplied with hydraulic fluid, wherein the supply chamber (78) is delimited in a first axial direction (4) by a first housing part (20) and in a second axial direction (6) opposite the first axial direction (4) by a second housing part (22), and the first housing part (20) is fixed on a hub (18). The first housing part (20) is fixed on the hub (18) with the second housing part (22) clamped in an axial (4, 6) direction between the first housing part (20) and the hub (18). Furthermore, the invention relates to a clutch device having such an actuating device (2) and to a method for producing such an actuating device (2).

Description

TECHNICAL FIELD

[0001] The present invention relates to a hydraulic actuation piston for a clutch device, having an actuation piston, a piston chamber corresponding to the actuation piston and a supply chamber arranged more inward in the radial direction than the piston chamber and via which hydraulic fluid can be fed to the piston chamber, wherein the supply chamber is delimited in a first axial direction by a first housing part and in a second axial direction opposite the first axial direction by a second housing part, and the first housing part is fixed on a hub. Furthermore, the invention relates to a clutch device having such an actuation device. The invention also relates to a method for producing such a hydraulic actuation device. BACKGROUND

[0002] Hydraulic actuation devices within a clutch device, for example a multi-plate clutch, are known in practice. Here, the known actuation devices mainly consist of an actuation piston, a first housing part, a second housing part and a hub, which can be configured as a corresponding hub for a clutch device. The actuation piston is arranged in such a way that it corresponds to a piston chamber. A supply chamber is arranged more inward in the radial direction than the piston chamber, via which hydraulic fluid can be fed to the piston chamber, so that the actuation piston can be driven. The piston chamber and the supply chamber are thus in flow connection with one another, wherein the division of the piston chamber and the supply chamber results from this: the actuation piston is arranged more outward in the radial direction with its piston surface, for example in order to achieve a particularly compact actuation piston. The supply chamber is delimited in a first axial direction by a first housing part and in a second axial direction opposite the first axial direction by a second housing part. The first housing part is fixed on the hub, usually welded to the hub, while ensuring the tightness of the supply chamber. The same applies to the second housing part, which is welded to the hub in a tight manner. Furthermore, the actuation piston is supported in the radial direction inward on the second housing part and guided or movable in the axial direction.

[0003] The known hydraulic actuation devices for a clutch device have proven to be relatively laborious to manufacture, although improvements are desirable. Furthermore, the known actuation devices tend to have an increased hysteresis behavior due to the gap between the actuation piston and the second housing part, on which the actuation piston is supported radially inward and guided movably in the axial direction. SUMMARY

[0004] It is therefore the object of the present invention to expand the configuration of a type of hydraulic actuation device in such a way that it has a particularly easy-to-manufacture structure and exhibits a smaller hysteresis behavior. Furthermore, the invention is based on the object of creating a hydraulically actuable clutch device having such an advantageous hydraulic actuation device. Furthermore, the invention is based on the object of giving a simplified method for producing a hydraulic actuation device for a clutch device.

[0005] This objective is achieved by a hydraulic actuation device for a clutch device, a hydraulically actuated clutch device for a transmission system of a motor vehicle, and a method for manufacturing a hydraulic actuation device for a clutch device. Advantageous embodiments of the invention are explained in detail in the following description.

[0006] This invention relates to a hydraulic actuation device for a clutch device, and therefore to a hydraulic actuation device for a hydraulically actuated clutch device. The hydraulic actuation device according to the invention has an actuating piston. The actuating piston is preferably an annular piston, and is particularly preferably configured as a plate component or a plate-formed component. The actuating piston corresponds to a piston chamber, and can move within the piston chamber when a corresponding pressure ratio exists therein. Furthermore, the actuation device has a supply chamber, which is arranged radially more inwardly than the piston chamber. Both the piston chamber and the supply chamber are preferably configured as annular chambers. It is also preferred that the piston chamber and the supply chamber are arranged at least partially nested within each other in the radial direction. The supply chamber is in flow connection with the piston chamber such that hydraulic fluid can be supplied to the piston chamber via the supply chamber and vice versa. The supply chamber is defined in a first axial direction by a first housing component and in a second axial direction opposite to the first axial direction by a second housing component. Preferably, both the first and second housing components are configured as plate components or plate-formed components. At least the second housing component is preferably configured as annular, and this is particularly preferably also applicable to the first housing component. The first housing component is fixed to the hub, for example, to the clutch hub of a clutch device. Preferably, the first housing component is connected to the hub, at least in both the first and second axial directions, and particularly preferably welded to the hub. It is also advantageous to achieve a rotary drive connection between the hub and the first housing component by fixing the first housing component to the hub. Although in some hydraulic actuators known in practice, the second housing component is also welded to the hub to limit the supply chamber in the second axial direction, this fixing of the second housing component to the hub is omitted in the actuator according to the invention. Instead, the first housing component is fixed to the hub by clamping the second housing component axially between the first housing component and the hub.

[0007] Therefore, in the hydraulic actuation device according to the invention, the second housing component and the fixing device for axially fixing the second housing component to the hub can be omitted; in particular, it is not necessary to weld the second housing component to the hub, whereby clamping the second housing component is used to ensure that the second housing component must be axially fixed relative to the hub and the first housing component. Thus, in the manufacture of the actuation device, the step of fixing the second housing component to the hub is eliminated, because fixing is preferably performed separately by fixing the first housing component to the hub while clamping the second housing component. This significantly simplifies the manufacture of the actuation device.

[0008] In an advantageous embodiment of the actuation device according to the invention, the second housing component is supported directly or indirectly on the hub in the second axial direction.

[0009] In another advantageous embodiment of the actuation device according to the invention, the second housing component is supported on the hub in the second axial direction with a seal placed in the middle to ensure the sealing of the supply chamber, and, if necessary, the sealing of the compensation chamber, etc., adjacent to the supply chamber. The seal is preferably annular or circumferential, and particularly preferably has at least two protruding sealing lips to ensure a tight seal. In this embodiment, it is also preferred that the seal is fixed to the second housing component, although the seal can theoretically also be fixed to the hub.

[0010] In another advantageous embodiment of the actuation device according to the invention, the second housing component is supported on a radially projecting support portion of the hub. Preferably, the radially projecting support portion is integrally constructed with the hub, ensuring reliable support of the second housing component in the second axial direction and simplified manufacturing. Alternatively or additionally, in this embodiment, the support portion is configured to be circumferentially surrounding. Therefore, the support portion can be constructed as a type of surrounding collar and / or as a portion of the hub in the shape of an annular disc.

[0011] In another advantageous embodiment of the actuation device according to the invention, the second housing component is supported directly or indirectly on the first housing component in the first axial direction. Preferably, the support of the second housing component on the first housing component is achieved radially further outward than the support of the second housing component on the hub. Direct support of the second housing component on the first housing component is also preferred because it is not necessary to arrange sealing or elastic elements there, especially since a flow connection can exist between the piston chamber and the supply chamber, and a certain degree of elasticity can already be obtained through the aforementioned seal between the second housing component and the hub.

[0012] Based on the above embodiments, in another advantageous embodiment of the actuation device according to the invention, the second housing component has at least two axial support protrusions that support the first housing component when forming an intermediate channel opening for establishing a flow connection between the supply chamber and the piston chamber. The at least two axial support protrusions here ensure relatively stable support, although it is preferred to provide three or more support protrusions. Furthermore, these support protrusions are evenly spaced apart from each other in the circumferential direction to obtain substantially identical channel openings. As an alternative or supplement to the axial support protrusions on the second housing component, in this embodiment, at least two axial support protrusions may also be provided on the first housing component, which support the second housing component when forming an intermediate channel opening for establishing a flow connection between the supply chamber and the piston chamber.

[0013] In a particularly advantageous embodiment of the actuation device according to the invention, the second housing component is radially supported on the hub, and if necessary on the aforementioned support portion of the hub. Thus, the second housing component can move radially relative to the hub during assembly and during operation of the actuation device. Therefore, self-centering of the second housing component can be achieved during assembly, as will be explained again later with reference to the actuating piston, which is also to be assembled. Furthermore, hysteresis during operation of the actuation device, which can be attributed to the gap between the actuating piston on one side and the second housing component on the other, is largely suppressed.

[0014] In a particularly advantageous embodiment of the actuation device according to the invention, the second housing component is detachably supported on the hub, or, if necessary, on the aforementioned support portion of the hub.

[0015] In principle, the aforementioned floating support of the second housing component in the radial direction, as well as the releasable arrangement on the hub, can be achieved by means of certain fixing devices. However, in another preferred embodiment of the actuation device according to the invention, without omitting the fixing device between the second housing component and the hub for axially and / or radially fixing the second housing component to the hub, the second housing component is supported on the hub in the second axial direction, thereby achieving a simple and equally easy-to-manufacture construction of the actuation device.

[0016] The above description of the support of the second housing component on the hub preferably applies correspondingly to the aforementioned support of the second housing component on the first housing component in the first axial direction. Therefore, in another preferred embodiment of the actuation device according to the invention, the second housing component is supported on the first housing component in the radial direction, floating and / or detachably and / or without the need for fixing devices for axially and / or radially securing the second housing component to the first housing component. The advantages mentioned above also apply here.

[0017] In a particularly preferred embodiment of the actuation device according to the invention, the second housing component is radially outwardly supported on the actuating piston so that, despite the aforementioned floating arrangement of the second housing component in the radial direction, reliable positioning and centering of the second housing component within the actuation device are still achieved. For this purpose, it is preferable that the second housing component has an axial portion, which may also be referred to as a tubular portion, so that the second housing component can be reliably supported on and on the actuating piston in the outwardly radial direction, and also allows the actuating piston itself to be guided and moved in its direction of movement, preferably in the opposite axial directions. The support of the second housing component is also preferably achieved with a seal for sealing the piston chamber placed in between. Here, the seal is preferably fixed to the actuating piston. Due to the floating arrangement of the second housing component in the radial direction, the radial clearance between the actuating piston and the second housing component can be reliably compensated without causing any increase in hysteresis behavior in the actuation device.

[0018] Based on the embodiments described above, in another particularly preferred embodiment of the actuation device according to the invention, the actuating piston is supported radially outward on the first housing member, such that the radial positioning of the second housing member is achieved via support also on the actuating piston and via the actuating piston's support on the first housing member. Preferably, the first housing member has an axial portion, which may also be referred to as a tubular portion, on which the actuating piston is supported radially outward. Furthermore, it has proven advantageous that the actuating piston is supported radially outward on the first housing member, whereby the axial portion of the first housing member is provided, if necessary, with a seal for sealing the piston chamber in between. In this variant, it is also preferred that the seal is fixed to the actuating piston. It has also been found advantageous that the aforementioned seal between the actuating piston and the second housing member is constructed concurrently or integrally with the seal between the actuating piston and the first housing member, wherein the two seals are particularly preferably fixed or have been fixed to the actuating piston as a continuous unit.

[0019] In another preferred embodiment of the actuation device according to the invention, the piston chamber is used to provide a compensation chamber for obtaining at least partial, preferably complete, centrifugal oil compensation. The compensation chamber is preferably defined in the first axial direction by the actuating piston and a second housing component. In the use of the actuation device in dual clutches, especially concentric dual clutches, it has proven advantageous that the compensation chamber is defined in the second axial direction by another housing component, if necessary, a disc support and / or a sealing element disposed thereon.

[0020] In another advantageous embodiment of the actuation device according to the invention, the supply chamber is separated from the compensation chamber by a second housing component. Preferably, the supply chamber and the compensation chamber are directly bounded by the second housing component, such that the fluid in the supply chamber and the fluid in the compensation chamber are in direct contact with the second housing component.

[0021] According to another advantageous embodiment of the actuation device according to the invention, at least one fluid line for supplying hydraulic fluid to the supply chamber is constructed in the hub. It has been found advantageous that the hub is at least partially constructed as a tube, wherein the fluid line extends optionally in the axial direction within the tubular portion or the wall of the tubular hub. Alternatively or additionally, at least one fluid line for conveying compensating fluid to the compensating chamber is constructed in the hub, wherein this fluid line also preferably extends optionally in the wall or a portion of the fully or partially tubular hub, optionally in the axial direction.

[0022] The hydraulically actuated clutch device according to the invention is designed for use in the transmission system of a motor vehicle, wherein the hydraulically actuated clutch has a hydraulic actuation device of the type according to the invention. Regarding the advantages of such a clutch device, reference is made to the advantages previously described for the actuation device according to the invention, and these advantages also apply accordingly to the clutch device.

[0023] In an advantageous embodiment of the clutch device according to the invention, it is configured as a dual-clutch and / or multi-plate clutch. It has been found that it is advantageous if the dual-clutch and / or multi-plate clutch is configured as a wet dual-clutch and / or multi-plate clutch.

[0024] In a particularly advantageous embodiment of the clutch device according to the invention, the actuating device is used for actuating the outer clutch of the concentric dual clutch configuration. In this embodiment, it is also preferred that the outer and inner clutches of the concentric dual clutch are at least partially nested in the radial direction.

[0025] The method according to the invention is used to manufacture a hydraulic actuation device for a clutch device, preferably a hydraulic actuation device of the type described above according to the invention. In this method, a hub, a first housing component, and a second housing component are provided. The second housing component is pushed onto the hub. Then, or simultaneously, the first housing component is pushed onto the hub while the second housing component is axially clamped between the first housing component and the hub, and a supply chamber is created axially between the first and second housing components. The first housing component is then secured to the hub to achieve a reliable arrangement of the first and second housing components within the actuation device to be created. By securing the first housing component to the hub, the first housing component is secured to the hub in at least two opposite axial directions, preferably also while obtaining a rotary drive connection with the hub. For this purpose, it is preferable to secure the first housing component to the hub by welding. As has been described with reference to the actuation device according to the invention, this eliminates, for example, welding of the second housing component to the hub, and other fixation of the second housing component to the hub besides clamping is unnecessary.

[0026] In a preferred embodiment of the method according to the invention, the second housing component is supported on the hub by being radially floating and / or releasably clamped between the second housing component and the hub, and / or omitting any fixing devices for axially and / or radially securing the second housing component to the hub. Therefore, any subsequent securing of the second housing component to the hub is omitted, which remains preferred.

[0027] According to another preferred embodiment of the method according to the invention, the second housing component is supported on the first housing component by being radially floating and / or releasably clamped between the second housing component and the first housing component, and / or omitting the fasteners for axially and / or radially fixing the second housing component to the first housing component. It is also preferable to omit subsequently fixing the second housing component to the first housing component.

[0028] In a particularly preferred embodiment of the method according to the invention, an actuating piston is also provided. The first housing component, the second housing component, and the actuating piston are then assembled with the second housing component radially outwardly supported on the actuating piston and the actuating piston radially outwardly supported on the first housing component. Then, before the first housing component is fixed to the hub as previously mentioned, the first housing component and the second housing component, together with the actuating piston, are pushed onto the hub. The advantage of this embodiment is that radial alignment of the second housing component relative to the first housing component, or even a coaxial arrangement of the second housing component relative to the first housing component, substantially corresponding to the arrangement in the completed actuating device, is achieved before the first and second housing components are pushed together with the actuating piston, thereby significantly simplifying the manufacturing process. The complex alignment of the second housing component relative to the hub is eliminated during manufacturing. Attached Figure Description

[0029] The invention will now be explained in detail with reference to the accompanying drawings and exemplary embodiments. (Unique) Figure 1 A partial side view of an embodiment of the hydraulic actuation device within the clutch equipment is shown in cross-section. Detailed Implementation

[0030] Figure 1 A hydraulic actuator 2 is shown in the clutch assembly of a transmission system for a motor vehicle. Figure 1 In the diagram, the opposing axial directions 4 and 6, opposing radial directions 8 and 10, and opposing circumferential directions 12 and 14 of the actuating device 2 or clutch device are indicated by corresponding arrows, wherein the actuating device 2 or clutch device is rotatable about a rotation axis 16 extending along the axial directions 4 and 6 in the circumferential directions 12 and 14. The two axial directions 4 and 6 are also referred to below as the first axial direction 4 and the second axial direction 6.

[0031] The actuating device 2 mainly consists of a hub 18, a first housing component 20, a second housing component 22, and an actuating piston 24. The hub 18 is basically constructed in a tubular shape and extends along the axial directions 4 and 6. Here, the hub 18 is preferably used as a hub on the input side of a clutch device, arranged and supported on a stable support tube.

[0032] The hub 18 has a support portion 26 that protrudes radially in the direction 8 and is integrally constructed with the hub 18. The support portion 26 is substantially constructed in the shape of an annular disc, wherein it is constructed to circumferentially in the directions 12, 14. A second support portion 28 is arranged at a distance from the support portion 26 in the first axial direction 4. This second support portion is also integral with the hub 18 and is constructed to circumferentially in the directions 12, 14. On its side facing the support portion 26, the second support portion 28 also has a protrusion 30 that protrudes outward in the radial direction 8 beyond the rest of the second support portion 28 and serves as a stop. A third support portion 32 is arranged at a distance from the support portion 26 in the second axial direction 6. This third support portion is also integral with the hub 18 and is constructed to circumferentially in the directions 12, 14. Therefore, the third support portion 32 protrudes outward along the radial direction 8 beyond the hub 18, wherein a protrusion 34 is also provided on the side of the third support portion 32 facing the support portion 26, the protrusion protruding outward along the radial direction 8 beyond the rest of the third support portion 32 and serving as a stop.

[0033] At least one first fluid line 36 is constructed in the hub 18 for supplying hydraulic fluid to the supply chamber of the actuator 2, which will be described in detail later. The first fluid line 36 extends axially in directions 4 and 6 between the support portion 26 and the second support portion 28 and subsequently into the supply chamber, which will be described in detail later. Furthermore, at least one second fluid line 38 is constructed in the hub 18 for supplying compensating fluid to the compensating chamber, which will be described in detail later. The second fluid line extends axially in directions 4 and 6 between the support portion 26 and the third support portion 32 into the compensating chamber. The first and second fluid lines 36 and 38 extend substantially axially in directions 4 and 6 within the wall of the tubular hub 18.

[0034] The first housing component 20 is constructed annularly in the circumferential directions 12, 14 and is configured as a sheet metal component or a sheet metal forming component. Within the clutch device, the first housing component 20 preferably serves as a support portion for a disc support portion, providing similar support in the radial directions 8, 10. The first housing component 20 has a first radial portion 40 extending substantially in the radial directions 8, 10, which extends outward from the hub 18 in the radial direction 8. An axial portion 42 connects to the first radial portion 40 in the radial direction 8, and the first radial portion extends outward from the first radial portion 40 in a second axial direction 6. A second radial portion 44 of the first housing component 20 is connected to the end of the axial portion 42 pointing towards the second axial direction 6, which extends outward from the axial portion 42 in the radial direction 8 to support the aforementioned disc support portion, in which case the disc support portion may also be integrally formed with the first housing component 20.

[0035] The first housing component 20 is pushed onto the hub 18 or its second support portion 28 along the second axial direction 6, such that the inner end of the first radial portion 40 in the radial direction 10 is supported on the protrusion 30 along the second axial direction 6. Furthermore, the end of the first radial portion 40 is fixed to the second support portion 28 of the hub 18 such that the first housing component 20 is fixed to the hub 18 in opposite axial directions 4, 6. In the illustrated embodiment, a fixed connection is also achieved, wherein a rotational drive connection exists between the hub 18 and the first housing component 20 in the circumferential directions 12, 14. This is achieved here by welding the first housing component 20 to the second support portion 28 of the hub 18, as shown in FIG1 by means of weld 46.

[0036] The second housing component 22 is also constructed in a ring around the periphery in the circumferential directions 12, 14 and is configured as a sheet metal component or a sheet metal forming component. At its end pointing inward in the radial direction 10, the second housing component 22 has a first radial portion 48, which extends in the radial directions 8, 10 and is designed in a substantially annular disc shape. Thus, the first radial portion 48 is substantially arranged in a plane extending in the radial directions 8, 10. Outward in the radial direction 8, the second radial portion 50 of the second housing component 22 connects to the first radial portion 48. However, unlike the first radial portion 48, the second radial portion 50 is constructed in an arched or protruding manner relative to the first radial portion 48 in the second axial direction 6. At the end of the second radial portion 50 outside the radial direction 8, the axial portion 52 of the second housing component 22 connects, wherein the axial portion 52 extends from the second radial portion 50 in the first axial direction 4. At least two axial support protrusions 56 are arranged at the end 54 of the axial portion 52 pointing in the first axial direction 4. These axial support protrusions extend beyond the end 54 along the first axial direction 4 and are evenly spaced apart from each other in the circumferential direction on the second housing component 22, and are integrally constructed therewith. Figure 1 Only one axial support protrusion 56 is shown in the figure.

[0037] A seal 58 is also fixed on the first radial portion 48 of the second housing component 22, which surrounds the circumferential direction 12, 14, wherein the seal 58 has at least two radially spaced circumferential sealing lips 60, 62, which are constructed on the side of the seal 58 pointing to the second axial direction 6.

[0038] The actuating piston 24 is substantially annular and constructed circumferentially in the circumferential directions 12, 14. The actuating piston 24 is preferably constructed as a sheet metal component or a sheet-formed component. The actuating piston 24 thus has a first piston portion 64 extending substantially in the radial directions 8, 10, which substantially defines a piston surface 66 pointing in the first axial direction 4. A second piston portion 68 connects to the first piston portion 64 radially outward in the second axial direction 6, wherein the second piston portion 68 extends substantially in the second axial direction 6 from the first piston portion 64. The end of the second piston portion 68 pointing in the second axial direction 6 connects to a force-transmitting portion 70 of the actuating piston 24, which, in this example, extends radially outward in the second piston portion 68 so as to interact with a disc assembly of a clutch device (not shown here).

[0039] To seal the gaps in the radial directions 8 and 10 between the axial portion 52 of the second housing component 22 and the radially inwardly pointing ends of the first piston portion 64, a surrounding first seal 72 is provided. Furthermore, a surrounding second seal 74 is provided to seal the gaps in the radial directions 8 and 10 between the second piston portion 68 and the axial portion 42 of the first housing component 20. Both seals 72 and 74 are exemplarily and preferably fixed to the actuating piston 24. Moreover, the two seals 72 and 74 are constructed and continuously fixed to the actuating piston 24.

[0040] Two piston portions 64, 68, together with seals 72, 74, are inserted into the free space in the radial directions 8, 10 between the axial portion 52 of the second housing component 22 and the axial portion 42 of the first housing component 20, thereby enabling the actuating piston 24 to move or be displaced in opposite axial directions 4, 6. Here, the actuating piston 24 corresponds to a hydraulically loadable piston chamber 76. The piston chamber 76 is defined in the first axial direction 4 by the first radial portion 40 of the first housing component 20 and in the opposite second axial direction 6 by the piston surface 66. Outwardly in the radial direction 8, the piston chamber 76 is defined by the axial portion 42 of the first housing component 20, and inwardly in the radial direction 10, the piston chamber 76 is defined by the axial portion 52 of the second housing component 22, although there is a flow connection in the region of the axial portion 52 of the second housing component 22 to the supply chamber 78, which will be described in detail below. The piston chamber 76, like the supply chamber 78, is constructed in annular shape, wherein the actuating piston 24 may also be referred to as an annular piston.

[0041] The supply chamber 78 is arranged further inward than the piston chamber 76 in the radial direction 10, wherein, in the illustrated embodiment, the supply chamber 78 is advantageously nested with the piston chamber 76 in the radial directions 8, 10. Hydraulic fluid can be supplied to the supply chamber 78 via at least one of the aforementioned first fluid lines 36, wherein the hydraulic fluid can in turn be supplied to the piston chamber 76 via the supply chamber 78, and for this purpose, at least two passage openings 80 are provided between the supply chamber 78 and the piston chamber 76, which will be discussed in detail later. The supply chamber 78 is defined in the first axial direction 4 by the first radial portion 40 of the first housing member 20 and in the second axial direction 6 by the radial portions 48, 50 of the second housing member 22. Outwardly in the radial direction 8, the definition of the supply chamber 78 is achieved by the axial portion 52 of the second housing member 22, wherein the passage openings 80 ensure flow connection with the piston chamber 76.

[0042] The first housing component 20 is fixed to the hub 18 via weld 46 by clamping the second housing component 22 between the first housing component 20 and the hub 18 in the axial directions 4 and 6 as described above. This eliminates the need for additional fixing or fixtures to fix the second housing component 22 to the hub 18, thus significantly simplifying the construction and manufacturing of the actuator 2. By clamping the second housing component 22, the second housing component 22 is directly supported on the hub 18, i.e., on its support portion 26, in the second axial direction 6 via its first radial portion 48, but with a seal 58 inserted in the middle. On the other hand, the second housing component 22 is directly supported on the first radial portion 40 of the first housing component 20 via the axial support protrusions 56 of the axial portion 52 due to the clamping in the first axial direction 4. The support provided by at least two axial support protrusions 56, forming the previously mentioned intermediate channel opening 80, establishes a flow connection between the supply chamber 78 on one side and the piston chamber 76 on the other side. Alternatively or additionally, a corresponding axial support protrusion 56 may also be constructed on the first radial portion 40 of the first housing member 20, so that the end 54 of the axial portion 52 of the second housing member 22 will be supported on the axial support protrusion in the case of forming the channel opening 80. Although it is preferred that the axial support protrusion 56 be provided on the second housing member 22, or if necessary, all of them be provided on the second housing member 22, because it is easier to manufacture the axial support protrusion 56 on the second housing member 22, which simplifies the manufacturing process.

[0043] Furthermore, it should be noted that the second housing component 22 can, in principle, be directly supported on the hub 18 in the second axial direction 6, with the intermediate seal 58 as a pad, i.e., on the support portion 26, which is not integrally constructed with the hub 18, but is fixed to the hub 18 in the axial directions 4 and 6 in other ways. However, this will increase manufacturing costs, because the separately constructed support portion 26 must be fixed to the hub 18 in the corresponding manufacturing steps. It should also be mentioned that the intermediate seal 58 can, in principle, also be arranged on the support portion 26, regardless of whether the support portion 26 is integrally constructed with or separate from the hub 18.

[0044] Although the second housing component 22 is clamped between the first housing component 20 and the hub 18 in the axial directions 4 and 6, it is floating or movably supported on the support portion 26 of the hub 18 in the radial directions 8 and 10. The second housing component 22 is also supported on the support portion 26 of the hub 18 in such a way that the second housing component 22 can be detached from the support portion 26 of the hub 18 and can be easily removed if the first housing component 20 is removed from the hub 18.Figure 1 It can also be seen that the fixing device for axially and / or radially fixing the first radial portion 48 of the second housing component 22 to the support portion 26 of the hub 18 is completely omitted, which is arranged between the first radial portion 48 and the support portion 26 of the hub 18.

[0045] This similarly applies to the support on the first housing member 20 in the first axial direction 4. Thus, the second housing member 22 floats or / and is detachably supported or / and, without the need for securing the second housing member 22 axially or / and radially to the first housing member 20, which is arranged between the second housing member 22 and the first housing member 20, via the axial support protrusion 56, on the first housing member 20, more precisely, on the first radial portion 40 of the first housing member 40.

[0046] To achieve relatively precise positioning of the second housing component 22 in the radial directions 8 and 10 despite its floating arrangement, the axial portion 52 of the second housing component 22 is supported on the first piston portion 64 of the actuating piston 24 with a first seal 72 for sealing the piston chamber 76 placed in the middle, while the actuating piston 24 is supported on the axial portion 42 of the first housing component 20 with a second seal 74 placed in the middle, and the second housing component 22 is supported on the radial portion 42 of the first housing component 20 with a second seal 74 placed in the middle, the floating arrangement of the second housing component 22 with respect to the radial directions 8 and 10, and the elasticity of the first and second seals 72 and 74, the second housing component 22 can be displaced or moved in the radial directions 8 and 10 to a certain extent, such that it can center itself in a manner excluded from conventional second housing component 22, which is fixed to the hub 18 or the support portion 26 of the hub 18 in the radial directions 8 and 10. Therefore, in the case of actuator 2, not only is simplified manufacturing ensured, but the hysteresis behavior of actuator 2 during operation is also effectively counteracted.

[0047] The compensation chamber 82 of the actuating device 2 corresponds to the piston chamber 76 to obtain at least partial, preferably complete, centrifugal oil compensation. Preferably, at least 90% centrifugal oil compensation can be obtained due to the compensation chamber 82. The compensation chamber 82 can be filled with corresponding compensation fluid via at least one of the aforementioned second fluid lines 38 and thus via the hub 18. The compensation chamber 82 is defined in the radially outer region in the first axial direction 4 by the first piston portion 64 and in the more inward radial direction 10 by the first and second radial portions 48, 50 of the second housing member 22, wherein fluid can come into direct contact with said portions 64, 48, 50 within the compensation chamber 82. Therefore, the supply chamber 78 is separated from the compensation chamber 82 by the second housing member 22, wherein both the supply chamber 78 and the compensation chamber 82 are directly defined by the second housing member 22, especially because the hydraulic fluid in the supply chamber 78 comes into direct contact with the second housing member 22. In the second axial direction 6, the compensation chamber 82 is defined by a third housing component 84, which is further defined by a sealing element 86 disposed on the third housing component 84. This sealing element seals the gap between the third housing component 84 and the second piston portion 68, thereby sealing the compensation chamber 82. The third housing component 84 can also be a support portion for supporting a disc support portion, which can be integrally constructed with such a disc support portion. Figure 1 It can also be seen that the third housing component 84, which is essentially annular and constructed as a sheet metal component or sheet metal molded component, is fixed to the third support portion 32 of the hub 18 in such a way that, with the sealing element 86 clamped between the third housing component 84 and the protrusion 34, the third housing component 84 is pushed onto the third support portion 32, and then, having achieved similar fixation in at least the axial directions 4 and 6, the third housing component 84 is then fixed to the hub 18, again using welding as an example, as shown by weld 88.

[0048] The clutch device including the actuation device 2 is configured as a wet dual-clutch and / or a multi-plate clutch. Here, the dual-clutch is configured as a concentric dual-clutch having an outer clutch and an inner clutch (not shown in detail), wherein the outer clutch is preferably nested with the inner clutch in the radial directions 8, 10. Here, the actuating piston 24 shown is used for actuating the outer clutch of this concentric dual-clutch. The first housing member 20 is used to support the outer disc support portion of the outer clutch and can be constructed separately from or integrally with this outer disc support portion. The third housing member 84 is used to support the outer disc support portion of the inner clutch in the radial directions 8, 10, wherein, and the third housing member 84 can also be constructed separately from or integrally with this outer disc support portion of the inner clutch.

[0049] The actuating device 2 or clutch device shown is manufactured according to the method steps described below. Firstly, a hub 18, a first housing component 20, and a second housing component 22 are provided. Then, the second housing component 22 is pushed onto the hub 18 along a second axial direction 6, such that a first radial portion 48 of the second housing component 22 is supported on a support portion 26 of the hub 18 via a seal 58. Subsequently or simultaneously, the first housing component 20 is pushed onto the hub 18 along the second axial direction 6, wherein this is achieved by clamping the second housing component 22 between the first housing component 20 and the support portion 26 of the hub 18 in axial directions 4 and 6, and forming the supply chamber 78 described above between the first and second housing components 20 and 22 in axial directions 4 and 6. The first housing component 20 is fixed to the hub 18 by welding, as shown by means of weld 46, if the first radial portion 40 is supported on the protrusion 34 of the second support portion 28 after being pushed along the second axial direction 6.

[0050] To simplify assembly by precisely positioning the two housing components 20 and 22 relative to each other in the radial directions 8 and 10 in the previously described actuation device 2, an actuating piston 24 is also provided so that, before the assembled assembly is pushed onto the hub 18, the first housing component 20, the second housing component 22, and the actuating piston 24 are first assembled with the second housing component 22 supported outward in the radial direction 8 on the actuating piston 24 and the actuating piston 24 supported outward in the radial direction 8 on the first housing component 20. Once the assembly is assembled, the first housing component 20 and the second housing component 22, together with the actuating piston 24 located between them, are pushed onto the hub 18, such that the first housing component 20 is supported on the protrusion 30 and the fixation of the first housing component 20 onto the hub 18, as described above, can be achieved via weld 46.

[0051] List of reference numerals

[0052] 2 Actuation device

[0053] 4-axis directions

[0054] 6-axis direction

[0055] 8 Radial direction

[0056] 10 Radial direction

[0057] 12 weeks in the direction

[0058] 14 circumferential direction

[0059] 16 Rotation Axis

[0060] 18-inch wheels

[0061] 20 First housing component

[0062] 22 Second housing component

[0063] 24 Actuating Pistons

[0064] 26 Supporting parts

[0065] 28 Second support section

[0066] 30 protrusions

[0067] 32 Third Support Section

[0068] 34 protrusions

[0069] 36 First Fluid Pipeline

[0070] 38 Second Fluid Pipeline

[0071] 40 First Axial Section

[0072] 42 Axial section

[0073] 44 Second Axial Section

[0074] 46 welds

[0075] 48 First radial portion

[0076] 50 Second radial portion

[0077] 52 Axial section

[0078] 54 end

[0079] 56 Axial support protrusion

[0080] 58 seals

[0081] 60 sealing lip

[0082] 62 sealing lip

[0083] 64 First Piston Section

[0084] 66 piston face

[0085] 68 Second Piston Section

[0086] 70 Force Transmission Section

[0087] 72 First Seal

[0088] 74 Second Seal

[0089] 76 Piston Chamber

[0090] 78 Supply Room

[0091] 80-channel opening

[0092] Compensation Room 82

[0093] 84 Third housing component

[0094] 86 sealing element

[0095] 88 weld seam.

Claims

1. A hydraulic actuation device (2) for a clutch device, comprising an actuating piston (24), a piston chamber (76) corresponding to the actuating piston (24), and a supply chamber (78) arranged more inwardly in a radial direction (10) than the piston chamber (76) and via which hydraulic fluid can be supplied to the piston chamber (76), wherein the supply chamber (78) is defined in a first axial direction (4) by a first housing member (20) and in a second axial direction (6) opposite to the first axial direction (4) by a second housing member (22), and the first housing member (20) is fixed to a hub (18), characterized in that, The first housing component (20) is fixed to the hub (18) while the second housing component (22) is clamped between the first housing component (20) and the hub (18) in the axial direction (4, 6), wherein the second housing component (22) is floatingly supported on the hub (18) in the radial direction (8, 10) or / and the second housing component (22) is floatingly supported on the first housing component (20) in the radial direction (8, 10).

2. The hydraulic actuation device (2) according to claim 1, characterized in that, The second housing component (22) is supported on the hub (18) indirectly or directly or / and with a seal (58) in the second axial direction (6).

3. The hydraulic actuation device (2) according to claim 2, characterized in that, The second housing component (22) is supported on the radially protruding support portion (26) of the hub (18).

4. The hydraulic actuation device (2) according to claim 3, characterized in that, The support portion (26) is integrally constructed with the hub (18) and / or surrounds it in the circumferential direction (12, 14).

5. The hydraulic actuation device (2) according to any one of claims 1 to 4, characterized in that, The second housing component (22) is indirectly or directly supported on the first housing component (20) in the first axial direction (4).

6. The hydraulic actuation device (2) according to claim 5, characterized in that, The second housing component (22) has at least two axial support protrusions (56) that are supported on the first housing component (20) when forming an intermediate channel opening (80) for establishing a flow connection between the supply chamber (78) and the piston chamber (76), or / and the first housing component (20) has at least two axial support protrusions that are supported on the second housing component (22) when forming an intermediate channel opening (80) for establishing a flow connection between the supply chamber (78) and the piston chamber (76).

7. The hydraulic actuation device (2) according to any one of claims 2 to 4, characterized in that, The second housing component (22) is detachably supported on the hub (18) without the need for a fixing device between the second housing component (22) and the hub (18) for axially and / or radially fixing the second housing component (22) to the hub (18), or / and the second housing component (22) is detachably supported on the first housing component (20) without the need for a fixing device between the second housing component (22) and the first housing component (20) for axially and / or radially fixing the second housing component (22) to the first housing component (20).

8. The hydraulic actuation device (2) according to any one of claims 1 to 4, characterized in that, The second housing component (22) is supported outwardly in the radial direction (8) on the actuating piston (24).

9. The hydraulic actuation device (2) according to claim 8, characterized in that, The axial portion (52) of the second housing component (22) is supported outwardly on the actuating piston (24) in the radial direction (8).

10. The hydraulic actuation device (2) according to claim 8, characterized in that, The second housing component (22) is supported on the actuating piston (24) with a seal (72) for sealing the piston chamber (76) in the middle.

11. The hydraulic actuation device (2) according to claim 8, characterized in that, The actuating piston (24) is supported outward along the radial direction (8) on the first housing component (20).

12. The hydraulic actuation device (2) according to claim 11, characterized in that, The actuating piston (24) is supported outward in the radial direction (8) on the axial portion (42) of the first housing component (20) and / or on the first housing component (20) with a seal (74) for sealing the piston chamber (76) in the middle.

13. The hydraulic actuation device (2) according to any one of claims 1 to 4, characterized in that, The piston chamber (76) is relative to the compensation chamber (82) used to obtain at least a portion of the centrifugal oil compensation.

14. The hydraulic actuation device (2) according to claim 13, characterized in that, The compensation chamber (82) is used to obtain all centrifugal oil compensation.

15. The hydraulic actuation device (2) according to claim 13, characterized in that, The supply chamber (78) is separated from the compensation chamber (82) by the second housing component (22).

16. The hydraulic actuation device (2) according to claim 13, characterized in that, The supply chamber (78) and the compensation chamber (82) are directly bounded by the second housing component (22).

17. The hydraulic actuation device (2) according to any one of claims 1 to 4, characterized in that, At least one fluid line (36) is constructed in the hub (18) for delivering hydraulic fluid to the supply chamber (78).

18. The hydraulic actuation device (2) according to claim 13, characterized in that, At least one fluid line (38) is constructed in the hub (18) for delivering compensation fluid into the compensation chamber (82).

19. A hydraulically actuated clutch device for a transmission system of a motor vehicle, characterized in that, The clutch device has a hydraulic actuation device (2) according to any one of claims 1 to 18.

20. The hydraulically actuated clutch device according to claim 19, characterized in that, The clutch device is configured as a dual-clutch and / or multi-plate clutch.

21. The hydraulically actuated clutch device according to claim 20, characterized in that, The clutch device is configured as a wet dual-clutch and / or multi-plate clutch.

22. The hydraulically actuated clutch device according to claim 19, characterized in that, The actuation device (2) is used to actuate the outer clutch of a clutch device configured as a concentric double clutch.

23. A method for manufacturing a hydraulic actuator (2) for a clutch device, comprising the following method steps, Provides a wheel hub (18), a first housing component (20), and a second housing component (22). Push the second housing component (22) onto the hub (18). With the second housing component (22) clamped between the first housing component (20) and the hub (18) in the axial direction (4, 6) and with a supply chamber (78) formed between the first housing component (20) and the second housing component (22) in the axial direction (4, 6), the first housing component (20) is pushed onto the hub (18). The first housing component (20) is fixed to the hub (18). in, The second housing component (22) is supported on the hub (18) by being clamped in the radial direction (8, 10) or / and the second housing component (22) is supported on the first housing component (20) by being clamped in the radial direction (8, 10).

24. The method according to claim 23, characterized in that, The first housing component (20) is fixed to the hub (18) by welding.

25. The method according to claim 23, characterized in that, The second housing component (22) is supported on the hub (18) by clamping in a releasable manner or / and without the fasteners between the second housing component (22) and the hub (18) for axially or / and radially fixing the second housing component (22) to the hub (18), or / and the second housing component (22) is supported on the first housing component (20) by clamping in a releasable manner or / and without the fasteners between the second housing component (22) and the first housing component (20) for axially or / and radially fixing the second housing component (22) to the first housing component (20).

26. The method of claim 23, further comprising the following steps: Provides an actuating piston (24) and Assemble the first housing component (20), the second housing component (22), and the actuating piston (24) with the second housing component (22) supported outward in the radial direction (8) on the actuating piston (24) and the actuating piston (24) supported outward in the radial direction (8) on the first housing component (20). in, The first housing component (20) and the second housing component (22), together with the actuating piston (24), are pushed onto the hub (18).

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