Clutch, especially dual clutch, for a motor vehicle

Abstract

The present invention relates to a clutch for a motor vehicle, in particular a dual clutch, which has at least one clutch plate group, at least one actuating piston and at least one cooling fluid input for inputting a cooling fluid, and has at least one blocking element for at least partially blocking the cooling fluid, the clutch plate group having an inner clutch plate and an outer clutch plate and at least one end clutch plate facing the actuating piston, in the engaged position of the actuating piston, a force acts from the actuating piston on the clutch plate group, so that a torque can be transmitted between the input side and the output side of the clutch by means of the clutch plate group, the cooling fluid can be supplied to the clutch plate group by means of the cooling fluid input and by means of the blocking element, and the clutch plate group can be temperature-controlled, in particular cooled, by means of the cooling fluid. The blocking element is designed as a separate component, namely a blocking ring, which has at least one guide section, by means of which the cooling fluid can be supplied to the clutch plate group.

Description

Technical Field

[0001] The present invention relates to a clutch for a motor vehicle, in particular a dual clutch, comprising at least one clutch plate pack, at least one actuating piston and at least one cooling fluid supply structure (Kühlfluidzufuhr, or cooling fluid input structure) for supplying a cooling fluid, and at least one blocking element (Stauelement) for at least partially blocking the cooling fluid, wherein the clutch plate pack comprises an inner clutch plate and an outer clutch plate and at least one end clutch plate, wherein the end clutch plate faces the actuating piston, wherein in the engaged position of the actuating piston, a force acts from the actuating piston on the clutch plate pack so that a torque can be transmitted between an input side and an output side of the clutch by means of the clutch plate pack, wherein cooling fluid can be supplied to the clutch plate pack by means of the cooling fluid supply structure and by means of the blocking element, and wherein the clutch plate pack can be temperature-controlled, in particular cooled, by means of the cooling fluid. Background Art

[0002] A corresponding dual clutch for a motor vehicle is known, for example, from DE 100 49 474 A1, from which the present invention proceeds. The dual clutch has two clutch plate groups, wherein each clutch plate group is equipped with an actuating piston. The dual clutch also has a cooling fluid supply structure for supplying a cooling fluid. A blocking element for at least partially blocking the cooling fluid is arranged inside the dual clutch. Each clutch plate group has an inner clutch plate and an outer clutch plate and at least one end clutch plate, wherein the end clutch plates are respectively facing the actuating piston. In the engaged position of each actuating piston, a force acts from the actuating piston on the adjacent clutch plate group, so that a torque can be transmitted between the input side and the output side of the clutch by means of the clutch plate group. In the disengaged position (Ausrückposition) of each actuating piston, substantially no force acts from the actuating piston on the clutch plate group, so that substantially no torque can be transmitted between the input side and the output side by means of the clutch plate group. Cooling fluid can be supplied to the clutch plate group by means of the cooling fluid supply structure and by means of the blocking element, wherein the clutch plate group can be temperature-controlled, in particular cooled, by means of the cooling fluid. The inner clutch plate is arranged on the inner clutch plate support, and the outer clutch plate is arranged on the outer clutch plate support. The inner clutch plate and the outer clutch plate have friction plates at their two end sides, by means of which the torque is transmitted or can be transmitted between two adjacent clutch plates. The end clutch plate also has a friction plate on at least one end side facing the adjacent clutch plate. In particular, when the clutch is running with slip, when the inner clutch plate support and the outer clutch plate support rotate at different speeds, the inner clutch plate and the outer clutch plate heat up significantly. The inner clutch plate and the outer clutch plate are cooled by causing a cooling fluid to flow around the inner clutch plate and the outer clutch plate.

[0003] In DE 100 49 474 A1, already mentioned above, two different embodiments of the blocking element are disclosed. In the first embodiment, the blocking element is welded to the end side of the inner clutch plate carrier. In the second embodiment, the end clutch plate has a cooling fluid guide section. With this embodiment of the blocking element, a uniform flow around the inner clutch plates and the outer clutch plates of the relevant clutch plate set and thus uniform cooling of all these clutch plates should be achieved.

[0004] The embodiments known from the prior art are not yet optimally designed. When the inner clutch plate and / or the outer clutch plate are stationary, that is to say in particular not rotating, less centrifugal force or even no centrifugal force acts on the cooling fluid, so that less cooling fluid flows around the inner clutch plate and the outer clutch plate, resulting in poorer cooling of the inner clutch plate and the outer clutch plate. In some cases, despite the provision of a blocking element, the cooling fluid flows past the inner clutch plate and / or the outer clutch plate when the clutch plates are stationary, in particular flows out axially to the outside. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to design and improve the known clutch for a motor vehicle in such a way that the cooling of the clutch plate group, in particular the cooling of the inner clutch plate and the outer clutch plate, is improved or improved, and in particular the manufacture and assembly of the clutch is simplified.

[0006] The technical problem of the present invention is now firstly solved by a clutch for a motor vehicle, in particular a double clutch, which has at least one clutch plate pack, at least one actuating piston And it has at least one cooling fluid supply structure for supplying cooling fluid, and has at least one blocking element for at least partially blocking the cooling fluid, wherein the clutch plate group has an inner clutch plate and an outer clutch plate and at least one end clutch plate, wherein the end clutch plate faces the operating piston, wherein, in the engaged position of the operating piston, force acts from the operating piston on the clutch plate group so that torque can be transmitted between the input side and the output side of the clutch by means of the clutch plate group, wherein cooling fluid can be supplied to the clutch plate group by means of the cooling fluid supply structure and by means of the blocking element, and wherein the clutch plate group can be temperature-controlled, in particular cooled, by means of the cooling fluid, according to the present invention, the blocking element is designed as a separate component, i.e., as a blocking ring, wherein the blocking ring has at least one guide section, and wherein cooling fluid can be delivered to the clutch plate group by means of the guide section of the blocking ring.

[0007] The basic principle of the invention is firstly that the blocking element is designed as a separate component, namely as a blocking ring, wherein the blocking ring has at least one guide section and wherein the cooling fluid can be supplied to the clutch plate set by means of the guide section of the blocking ring. In particular, since the blocking element is now designed as a separate component, the disadvantages known in the prior art can be avoided, in particular, it is not necessary to produce special tools for forming a specific end clutch plate at high cost and / or (as was previously the case in the prior art) to produce and assemble such a specific end clutch plate with the associated high effort. The clutch according to the invention can now be produced and assembled at low cost.

[0008] In a preferred embodiment, a pressure space can be formed in particular towards the clutch plate set by means of the guide section of the blocking ring. In other words, a "collection space" for the cooling fluid is formed by means of the guide section of the blocking ring, in particular a pressure space towards the clutch plate set, from which the cooling fluid can then be introduced into the clutch plate set or conveyed to the clutch plate set in a simple manner. The term "pressure space towards the clutch plate set" means in particular that a pressure space adjacent to the clutch plate set is formed or can be formed thereby, from which a flow of cooling fluid can be achieved and into the clutch plate set, in particular to the inner clutch plate and the outer clutch plate.

[0009] In this case, in a preferred embodiment, the blocking ring is in particular fixed to a component of the clutch which rotates at the engine speed of the motor vehicle or accordingly rotates therewith, wherein in particular the cooling fluid is optimally conveyed therefrom in the direction of the clutch plate pack via the blocking ring which rotates therewith.

[0010] In a first (or third or fourth) preferred embodiment, the blocking ring is arranged on the end side of the operating piston facing the end clutch plate. Here, the blocking ring can be fixed directly on the end side of the operating piston facing the end clutch plate or can also be arranged in particular in the axial peripheral area of ​​the end side of the operating piston, in particular clamped or clamped, as will be explained in more detail below. In such an arrangement of the blocking ring, a good to optimal design of the pressure space can also be achieved, so that a good supply of cooling fluid to the clutch plate group and a good flow around the inner clutch plate and the outer clutch plate can be achieved even when the inner clutch plate and / or the outer clutch plate are stationary ( In particular, a flow of cooling fluid between the blocking ring and the end clutch plate in the axial direction away from the clutch plate set can be avoided or at least reduced to a very small, insignificant extent. A good flow around the inner and outer clutch plates achieves good cooling of these inner and outer clutch plates.

[0011] By designing the blocking element as a blocking ring and as a separate component, the manufacture of the clutch and its assembly are simplified. It is no longer necessary to design and manufacture a specific end clutch plate, on which a guide section is provided, as was previously the case in the prior art. Standard components can now be used as end clutch plates, and even inner and outer clutch plates can possibly be used. As a result, the clutch can now be manufactured particularly cost-effectively.

[0012] As independent component, blocking ring also can be particularly easily adapted to the various requirements of corresponding clutch and therefore improve the cooling of clutch plate group.Even if use the blocking ring of different designs, also do not need to carry out structural change or only need very little structural change to clutch at this.

[0013] In a preferred first embodiment of the clutch, the blocking ring is arranged and / or fixed on the end side of the operating piston facing the end clutch plate. Therefore, the design of the clutch plate group does not have to be changed according to the design of the blocking ring. Standard clutch plate groups can be used, which has a positive effect on the manufacturing costs of the clutch. In particular, the blocking ring is fixed on the end side of the operating piston facing the end clutch plate. This fixing is carried out by means of commonly used devices, such as screws and / or rivets. It is also conceivable to weld the blocking ring to the operating piston. During the fixing, the blocking ring moves back and forth or correspondingly moves axially between the engagement position and the disengagement position of the operating piston together with the operating piston.

[0014] In a further preferred second embodiment of the clutch, a blocking ring is arranged between the operating piston and the end side of the end clutch plate. The blocking ring and the end clutch plate are preferably arranged on the same clutch plate support. Therefore, when the operating piston is loaded with force or engaged, a particularly good contact can be achieved between the end clutch plate and the blocking ring, in particular on the outer clutch plate. Leakage or an undesired outflow of cooling fluid from the pressure space can be avoided particularly well. Preferably, in the engaged position and / or disengaged position of the operating piston, the clutch plate group can be optimally supplied with cooling fluid.

[0015] In a further preferred third embodiment, the blocking ring is also arranged and / or fastened on the actuating piston, in particular clamped in the axial circumferential region of the end face of the actuating piston, as will be explained in greater detail below.

[0016] In another preferred fourth embodiment, the blocking ring is also arranged and / or fixed on the operating piston, especially also clamped in the axial peripheral area of ​​the end side of the operating piston. However, the specific shape of the blocking ring of the preferred fourth embodiment is different from the preferred third embodiment, which will also be described in more detail below.

[0017] Therefore, in particular, a number of advantages are achieved by means of the first, second, third and / or fourth embodiment of the clutch:

[0018] The corresponding clutch advantageously has an inner clutch plate support for accommodating the inner clutch plate, wherein the pressure chamber can be formed and / or delimited by means of a blocking ring, the clutch plate pack and / or by means of the inner clutch plate support. Thus, in addition to the blocking ring, other elements of the clutch are also used to form the pressure chamber, which are also necessary for other functions of the clutch. Thus, the total number of components in the clutch can be kept low, which has a positive effect on the manufacturing costs and thus simplifies the assembly of the clutch and reduces the work expenditure. Thus, the desired flow of cooling fluid to the clutch plate pack can be achieved or realized particularly easily.

[0019] The inner clutch plate support usually has at least one opening toward the clutch plate set, through which the cooling fluid flows toward the clutch plate set. A row of openings is preferably designed in the inner clutch plate support to achieve a particularly uniform flow of the cooling fluid toward the clutch plate set. In order to achieve a uniform flow around the inner clutch plate and the outer clutch plate, the design of one or more openings in the inner clutch plate support is adjusted (or adapted) or can be adjusted in this way according to the pressure ratio of the cooling fluid in the pressure space.

[0020] In another embodiment of the clutch, the blocking ring has a contact area, wherein, in particular when the actuating piston is in the engaged position, a linear contact and / or a contact surface can be formed between the end side of the end clutch plate facing the blocking ring and the blocking ring by means of the contact area. In this case, in particular, a linear contact can be achieved between the blocking ring and the end clutch plate. It is important that no cooling fluid can flow between the end clutch plate and the blocking ring.

[0021] The size of the contact surface realized between the blocking ring and the end clutch plate is in particular at least 10% of the end side of the end clutch plate facing the blocking ring. The contact surface is preferably designed to be so large that in particular the actuating piston with its end side in the engaged position completely rests on the blocking ring and does not rest on the end clutch plate or at least does not rest on parts of the end clutch plate. As a result, the sealing effect between the end clutch plate and the blocking ring is also further improved. In addition, the sealing effect between the actuating piston and the blocking ring is also improved.

[0022] The barrier ring advantageously has a transition region, wherein the transition region is designed in particular between the contact region of the barrier ring and the guide section of the barrier ring. The barrier ring can thus be adapted particularly well to its two functions, namely the function of sealing the pressure space and the function of forming the pressure space, wherein the contact region is mainly used to seal the pressure space and the guide section is mainly used to form the pressure space. By means of the guide section and the positioning of the guide section achieved by the transition region, the pressure space can be adapted particularly precisely to the advantageous pressure and flow ratios of the cooling fluid, in particular also in the pressure space itself.

[0023] In another preferred design of the clutch, the contact area is arranged in a first plane extending perpendicularly to the rotation axis of the inner clutch plate support, wherein the guide section is arranged in a second plane extending perpendicularly to the rotation axis of the inner clutch plate support, wherein the first and second planes have an axial distance from each other.

[0024] Therefore, the pressure space can be designed in particular in the region of the axially and / or radially offset arrangement relative to the clutch plate group. It is possible to successfully avoid the excessive pressure of the cooling fluid before it reaches the pressure space. Excessive pressure in the cooling fluid may lead to leaks, excessive turbulence of the cooling fluid and undesirable flow paths, which can now be successfully avoided due to the pressure space that is axially and / or radially offset arrangement relative to the clutch plate group. In particular, the pressure space is designed radially inwardly offset, and the pressure space is particularly designed in the region of the radial position of the inner clutch plate support. In addition, this design of the blocking ring can realize the particularly simple manufacture of the blocking ring, for example, by a low-cost method, such as deep drawing to realize the particularly simple manufacture of the blocking ring.

[0025] The clutch advantageously has an external clutch plate support for accommodating an external clutch plate, wherein the blocking ring has at least one lug. The lug is formed on the outer circumference of the blocking ring, wherein the external clutch plate support has at least one toothing and / or groove, and wherein the blocking ring protrudes with its lug into the toothing or groove. In this way, a simple and reliable support of the blocking ring can be achieved, in particular a torsion lock, which can also be achieved by simple means and therefore also inexpensively.

[0026] In another embodiment of the clutch, the blocking ring is designed as a stamped part. Stamped parts can be produced in large quantities and very quickly, which brings economic advantages. In addition, complex shapes, such as the above-mentioned lugs, can be stamped out easily and without significant additional expenditure. The stamping process can be carried out in combination with other processes, such as the deep drawing process already mentioned. Then, deep drawing and stamping are carried out in one combined working step or in two consecutive working steps. It is also conceivable to design the blocking ring as a sintered part or a plastic part. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] There are now a large number of possibilities for designing and / or improving the clutch according to the present invention in an advantageous manner. Now, a number of preferred designs of the present invention are further described below based on the accompanying drawings and the associated description. In the accompanying drawings:

[0028] Figure 1 A first exemplary embodiment of a clutch according to the invention is schematically shown in section in a side view, with an actuating piston in an engaged position;

[0029] Figure 2 A first exemplary embodiment of a clutch according to the invention is schematically shown in section in a side view, with an actuating piston in a disengaged position;

[0030] Figure 3 A second exemplary embodiment of a clutch according to the invention is schematically shown in section in a side view;

[0031] Figure 4 Schematically shown Figure 3 A section of a blocking ring of a clutch according to the present invention;

[0032] Figure 5 A third exemplary embodiment of a clutch according to the invention is schematically shown in a side view, the clutch having an actuating piston in a disengaged position; and

[0033] Figure 6 A fourth exemplary embodiment of a clutch according to the invention is shown schematically in a side view with an actuating piston in a disengaged position. DETAILED DESCRIPTION

[0034] exist Figure 1 , 2 , 3 and 5 and 6 schematically show a clutch 1 for a motor vehicle.

[0035] The clutch 1 has a clutch plate package 2, an actuating piston 3 and a cooling fluid supply 4 for supplying a cooling fluid 5. A blocking element 6 serves to at least partially block the cooling fluid 5. The flow of the cooling fluid 5 is symbolically indicated by means of arrows.

[0036] The clutch plate group 2 has an inner clutch plate 7 and an outer clutch plate 8 and at least one end clutch plate 9, wherein the end clutch plate 9 faces the actuating piston 3. The inner clutch plates 7 and the outer clutch plates 8 are arranged alternately, that is, each of the inner clutch plates 7 is arranged between two outer clutch plates 8 and each outer clutch plate 8 is arranged between two inner clutch plates 7 (except for the outer clutch plates at the two ends). The end clutch plates 9 shown in the drawings are designed as outer clutch plates 8.

[0037] Figure 1 The actuating piston 3 is shown in a engaged position 10 , wherein in the engaged position 10 a force acts from the actuating piston 3 on the clutch plate package 2 , so that a torque can be transmitted between the input side and the output side of the clutch 1 by means of the clutch plate package 2 .

[0038] exist Figure 2 The actuating piston 3 is shown in the disengaged position 11. Figure 2 Use with Figure 1 In the disengaged position 11 , no appreciable force acts from the actuating piston 3 on the clutch plate package 2 , so that no appreciable torque can be transmitted between the input side and the output side of the clutch 1 by means of the clutch plate package 2 .

[0039] With the aid of the cooling fluid supply structure 4 and with the aid of the blocking element 6, the clutch plate set 2 can be supplied with cooling fluid 5. With the aid of the cooling fluid 5, the temperature of the clutch plate set 2 can be regulated, in particular the clutch plate set 2 can be cooled. Depending on the temperature of the cooling fluid 5 compared to the temperature of the clutch plate set 2, the clutch plate set 2 can also be heated with the aid of the cooling fluid 5 when necessary. This may be useful, for example, in the preheating phase of the clutch 1 in order to heat the clutch plate set 2 to the operating temperature. In order to cool the clutch plate set 2, the cooling fluid 5 has a lower temperature than the clutch plate set 2. In order to heat the clutch plate set 2, the cooling fluid 5 has a higher temperature than the clutch plate set 2. The above statements apply essentially to all Figure 1 , 2 , 3 and 5 and the preferred embodiments shown in 6.

[0040] The disadvantages mentioned at the outset are now avoided in particular by designing the blocking element 6 as a separate component, namely as a blocking ring 12. The blocking element 6 designed as a blocking ring 12 has a guide section 13. With the aid of the guide section 13 of the blocking ring 12, a cooling fluid can be supplied to the clutch plate set 2. In particular, the cooling fluid 5 is supplied to the clutch plate set 2 in such a way that the cooling fluid 5 is introduced into the gap existing between the end region of the end clutch plate 9 and the inner clutch plate carrier 15. The disadvantages mentioned at the outset are thereby avoided.

[0041] For here Figure 1 , 2 , 3 and 5 and the embodiments shown in 6 form a pressure space 14 facing the clutch plate package 2 by means of the blocking element 6 designed as a blocking ring 12, in particular by means of the guide section 13 of the blocking element 6 designed as a blocking ring 12.

[0042] The blocking element 6 designed as a blocking ring 12 is Figure 1 and 2In the embodiment shown in the figure, the blocking element 6 is arranged and / or fixed on the end side of the actuating piston 3 facing the end clutch plate 9. Here, the blocking ring 12 is at least partially arranged, especially functionally effectively, between the actuating piston 3 and the end side of the end clutch plate 9 facing the actuating piston 3. The blocking element 6 designed as a blocking ring 12 is fixed to the actuating piston 3 in a particularly torsionally fixed (or torsionally locked) manner, preferably by means of conventional means, such as screws or rivets. When the clutch 1 is in operation, the blocking element 6 designed as a blocking ring 12 moves back and forth or correspondingly moves with the actuating piston 3 between the engaged position 10 and the disengaged position 11.

[0043] Figure 3 A second exemplary embodiment of a clutch 1 according to the invention is schematically shown in section in a side view. The same reference numerals as in the previous figures are used for identical components.

[0044] In the second embodiment of the clutch 1 according to the invention, the blocking element 6 designed as a blocking ring 12 is arranged between the actuating piston 3 and the end side of the end clutch plate 9. Regardless of whether the actuating piston 3 is now in the engaged position 10, the disengaged position 11, or an intermediate position between the engaged position 10 and the disengaged position 11, the blocking element 6 designed as a blocking ring 12 is always located between the end clutch plate 9 and the actuating piston 3. It is also conceivable to arrange a blocking ring on the end clutch plate. Figure 3 In the second embodiment shown in FIG. 1 , the blocking ring 12 is now arranged between the actuating piston 3 and the end side of the end clutch plate 9, wherein the blocking ring 12 is thus in particular functionally connected to the outer clutch plate carrier 19 or the inner clutch plate carrier 15, in particular as in FIG. Figure 3 As shown in FIG. 1 , it is functionally connected to the outer clutch plate carrier 19 .

[0045] It is particularly advantageous not only for the second embodiment of the clutch 1 according to the invention but also for the first and third or fourth embodiment of the clutch 1 according to the invention if the blocking ring 12 is fastened to a component of the clutch 1 which moves rotationally at the engine speed or correspondingly rotates at the engine speed.

[0046] Figure 5 A third exemplary embodiment of a clutch 1 according to the invention is schematically shown in section in a side view. The same reference numerals as in the previous figures are used for the same components. Figure 5 It can be clearly seen that the blocking ring 12 is Figure 1 and 2 The retaining rings in the are designed slightly differently in terms of construction technology. Figure 5In the embodiment, the blocking ring 12 is also arranged and / or fixed on the actuating piston 3, in particular the blocking ring 12 is clamped in the axial upper peripheral area closer to the end side of the actuating piston 3. It should also be pointed out that in particular the transition area 18 of the blocking ring 12 is Figure 5 The outer clutch plate 8 is located substantially at the same height as the radially inner end region of the outer clutch plate 8. As a result, a particularly good supply of cooling fluid can be achieved by means of the transition region 18 towards the clutch plate package 2.

[0047] Figure 6 A fourth exemplary embodiment of a clutch 1 according to the invention is schematically shown in section in a side view. The same reference numerals as in the previous figures are used for the same components. Figure 6 It can be clearly seen that the blocking ring 12 is structurally similar to Figure 5 The blocking ring in the embodiment is designed slightly differently. In particular, the blocking ring 12 is clamped in the axial lower peripheral area closer to the end side of the actuating piston 3. Here, the transition area 18 of the blocking ring 12 is Figure 6 The center is also substantially at the same height as the radially inner end region of the outer clutch plate 8 .

[0048] In the engaged position 10 of the actuating piston 3 and in the disengaged position 11 of the actuating piston 3 , the clutch plate set 2 can be supplied with cooling fluid. This applies both to the first embodiment of the clutch 1 and to the second, third and fourth embodiments of the clutch 1 . The following statements generally apply to Figure 1 , 2 , 3 and 5 and all four preferred embodiments of 6:

[0049] Thus, in particular, the cooling fluid 5 is also supplied to the clutch plate set 2 even when the corresponding rotatable part of the clutch 1 is at rest. Such a rotatable part of the clutch exerts centrifugal forces on the cooling fluid 5. In both embodiments of the clutch 1 shown here, the cooling fluid 5 also flows to the clutch plate set 2, in particular regardless of whether additional centrifugal forces act on the cooling fluid 5. However, the cooling fluid is optimally guided to the clutch plate set 2 when the blocking ring 12 rotates accordingly, in particular the blocking ring 12 is thus rotationally connected to a component of the clutch, which in turn is functionally connected to the engine shaft or the engine.

[0050] The clutch 1 has an inner clutch plate carrier 15 for accommodating the inner clutch plate 7, wherein the pressure chamber 14 is formed or delimited by means of the blocking element 6 designed as a blocking ring 12, the clutch plate set 2 and / or by means of the inner clutch plate carrier 15. In particular, in the engaged position of the actuating piston 3, the pressure chamber 14 is formed and formed "closed upwards" so that the cooling fluid 5 can be optimally supplied to the clutch plate set 2. It is conceivable that other elements of the clutch 1, such as a housing region, adjoin the pressure chamber 14.

[0051] The blocking element 6 designed as a blocking ring 12 has a contact area 16, wherein a linear contact and / or a contact surface 17 is formed between the end side of the end clutch plate 9 facing the blocking element 6 designed as a blocking ring 12 and the blocking element 6 designed as a blocking ring 12 by means of the contact area 16. The size of the contact surface 17 is in particular at least 10% of the area of ​​the end side of the end clutch plate 9 facing the blocking element 6 designed as a blocking ring 12. As a result, a high adhesion between the end clutch plate 9 and the blocking element 6 designed as a blocking ring 12 is achieved.

[0052] The blocking element 6 designed as a blocking ring 12 has a transition region 18 , wherein the transition region 18 is formed between the contact region 16 of the blocking element 6 designed as a blocking ring 12 and the guide section 13 of the blocking element 6 designed as a blocking ring 12 .

[0053] The contact area 16 is arranged in a first plane E1 extending perpendicularly to the rotation axis of the inner clutch plate support 15, wherein the guide section 13 is arranged in a second plane E2 extending perpendicularly to the rotation axis of the inner clutch plate support 15, wherein the first and second planes E1, E2 have an axial distance L from each other. Other arrangements of the guide section 13 and the contact area 16 are conceivable. The purpose of the spatial design of the blocking element 6 designed as a blocking ring 12 and its guide section 13, its transition area 18 and its contact area 16 is in particular to be able to form a pressure space 14 that is optimally designed in terms of cooling the clutch plate group 2. A flow of cooling fluid 5 is formed in the pressure space 14, which flow depends largely on the arrangement of the guide section 13, the arrangement of the transition area 18 and the arrangement of the contact area 16. The axial distance L between the first plane E1 and the second plane E2 preferably has an adapted and / or determined distance. In this way, the shape of the blocking element 6 or the blocking ring 12, in particular, can be optimally adapted to the given installation space of the corresponding clutch 1. The oil delivery effect is produced in particular by the rotating blocking ring 12. By means of an adapted geometry of the “accumulation area” of the blocking ring 12 , the delivery efficiency into the clutch disk package 2 can be additionally effectively increased.

[0054] The clutch 1 has an outer clutch plate carrier 19 for accommodating the outer clutch plate 8 .

[0055] exist Figure 4 Schematically, a section of a blocking ring 12 of a clutch 1 according to the invention is shown in FIG. The blocking ring 12 has at least one lug 20 , wherein the lug 20 is formed on the outer circumference of the blocking ring 12 . In particular, the blocking ring 12 has a plurality of lugs 20 .

[0056] The outer clutch plate carrier 19 has at least one toothing and / or groove 21, wherein the blocking ring 12 projects with its lugs 20, in particular for the purpose of achieving a rotational stop / protection, into the toothing or groove 21. The blocking ring 12 is thus supported on the outer clutch plate carrier 19 or is functionally connected to the outer clutch plate carrier 19.

[0057] Figure 4 The support structure of the blocking ring 12 is particularly Figure 3 However, for example, as a supplement to the fixing of the blocking ring 12 on the fixed piston 3 shown here, it is also conceivable to fix the blocking ring 12 on the fixed piston 3 in the second embodiment. Figure 1 and Figure 2 Such a support structure of the blocking ring 12 is realized in the first embodiment of the present invention.

[0058] The retaining ring 12 is designed as a stamped part. The retaining ring 12 preferably comprises steel. Steel is available cheaply and has the properties that are important for the retaining ring 12, namely, sufficient strength in particular with respect to the mechanical loads and flow mechanical loads of the retaining ring 12. It is also conceivable to design the retaining ring as a sintered part or a plastic part.

[0059] The cooling fluid supply structure 4 is formed in the form of a flow channel inside the clutch 1. The flow channel of the cooling fluid supply structure 4 is formed by, for example, the wall of the inner clutch plate carrier 15 and / or by the wall of the housing 23 of the clutch and / or by the wall of other components of the clutch 1.

[0060] The output side / transmission side of the clutch 1 is in particular functionally connected to the inner clutch plate carrier 15. The input side / engine side of the clutch is in particular functionally connected to the outer clutch plate carrier 19. In principle, it is also conceivable that the input side of the clutch 1 is functionally connected to the inner clutch plate carrier and the output side of the clutch 1 is functionally connected to the outer clutch plate carrier.

[0061] The clutch 1 can be designed in particular as a double clutch. Such a double clutch in particular has two clutch plate packs with associated elements or components.

[0062] List of Reference Numerals

[0063] 1 Clutch

[0064] 2 Clutch plate set

[0065] 3. Operating piston

[0066] 4 Cooling fluid supply structure

[0067] 5 Cooling fluid

[0068] 6 Blocking element

[0069] 7 Inner clutch plate

[0070] 8 External clutch plate

[0071] 9 End clutch plate

[0072] 10 Engagement position

[0073] 11 Out of position

[0074] 12 Blocking ring

[0075] 13. Guide

[0076] 14 Pressure Space

[0077] 15 Inner clutch plate bracket

[0078] 16 Contact area

[0079] 17 Contact surface

[0080] 18 Transition Zone

[0081] 19 External clutch plate bracket

[0082] 20 Lugs

[0083] 21 slots

[0084] 22 Gap

[0085] 23 Shell

[0086] E1 First plane

[0087] E2 Second Plane

[0088] L distance

Claims

1. A clutch (1) for a motor vehicle, comprising at least one clutch plate set (2), at least one actuating piston (3) and at least one cooling fluid supply structure (4) for supplying cooling fluid (5), and at least one blocking element (6) for at least partially blocking the cooling fluid (5), wherein: The clutch plate group (2) has an inner clutch plate (7) and an outer clutch plate (8) and at least one end clutch plate (9), wherein the end clutch plate (9) faces the operating piston (3), wherein in the engaged position (10) of the operating piston (3), a force acts from the operating piston (3) on the clutch plate group (2), so that a torque can be transmitted between the input side and the output side of the clutch (1) by means of the clutch plate group (2), wherein a cooling fluid (5) can be supplied to the clutch plate group (2) by means of a cooling fluid supply structure (4) and by means of a blocking element (6), and wherein the clutch The clutch plate group (2) can be cooled by means of a cooling fluid (5), characterized in that the blocking element (6) is designed as a separate component, namely as a blocking ring (12), wherein the blocking ring (12) has at least one guide section (13), and wherein the cooling fluid can be conveyed to the clutch plate group (2) by means of the guide section (13) of the blocking ring (12), wherein a cooling fluid supply structure is formed in the form of a flow channel inside the clutch, wherein a pressure space for cooling fluid is formed towards the clutch plate group by means of the guide section of the blocking ring, and then the cooling fluid can be conveyed from the pressure space to the clutch plate group.

2. The clutch (1) according to claim 1, wherein the clutch (1) is a double clutch.

3. The clutch (1) according to claim 1, characterized in that: A pressure space (14) facing the clutch plate set (2) is formed by means of a guide section (13) of a blocking ring (12).

4. The clutch (1) according to claim 1 or 2, characterized in that: The blocking ring (12) is arranged on the end side of the actuating piston (3) facing the end clutch plate (9) and / or is clamped and / or fixed in the axial circumferential region of the end side of the actuating piston (3).

5. The clutch (1) according to claim 1, characterized in that: The blocking ring (12) is functionally effectively arranged between the actuating piston (3) and the end side of the end clutch plate (9) facing the actuating piston (3), and / or the blocking ring (12) is arranged between the actuating piston (3) and the end side of the end clutch plate (9) and / or is functionally effectively connected to an outer clutch plate holder (19) or an inner clutch plate holder (15).

6. The clutch (1) according to claim 3, characterized in that: The inner clutch plate carrier (15) is designed to accommodate the inner clutch plate (7), wherein the pressure chamber (14) can be formed and / or delimited by means of a blocking ring (12), the clutch plate package (2) and by means of the inner clutch plate carrier (15).

7. The clutch (1) according to claim 1, characterized in that The blocking ring (12) has a contact area (16), wherein a linear contact and / or a contact surface (17) can be formed between the end side of the end clutch plate (9) facing the blocking ring (12) and the blocking ring (12) by means of the contact area (16).

8. The clutch (1) according to claim 7, characterized in that The contact surface (17) has a size of at least 10% of the area of ​​the end side of the end clutch plate (9) facing the blocking ring (12).

9. The clutch (1) according to claim 1, characterized in that: The barrier ring (12) has a transition region (18), wherein the transition region (18) is formed between a contact region (16) of the barrier ring (12) and a guide section (13) of the barrier ring (12).

10. The clutch (1) according to claim 7 or 9, characterized in that: The contact area (16) is arranged in a first plane (E1) extending perpendicularly to the rotation axis of the inner clutch plate support (15), wherein the guide section (13) is arranged in a second plane (E2) extending perpendicularly to the rotation axis of the inner clutch plate support (15), and wherein the first and second planes (E1, E2) have an axial distance (L) from each other.

11. The clutch (1) according to claim 1, characterized in that The clutch (1) has an external clutch plate support (19) for accommodating an external clutch plate (8), wherein the blocking ring (12) has at least one lug (20), wherein the lug (20) is designed on the outer circumference of the blocking ring (12), wherein the external clutch plate support (19) has at least one tooth and / or groove (21), and wherein the lug (20) protrudes into the tooth and / or the groove (21) for achieving a torsional stop.

12. The clutch (1) according to claim 1, characterized in that The blocking ring (12) is designed and / or manufactured as a stamped part, a plastic part or a sintered part.

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