Double cage, switchable freewheel and clutch assembly with switchable freewheel

Abstract

Double cage (21) for a clamping element freewheel, comprising an inner cage ring (22) and an outer cage ring (23), wherein the inner cage ring (22) has a clamping element area (22a) for receiving clamping elements (24) and the outer cage ring (23) has a clamping element area (23a) for receiving the clamping elements (24), characterized in that at least one of the inner cage ring (22) and the outer cage ring (23) is actively adjustable relative to the other of the outer cage ring (23) and the inner cage ring (22), wherein the inner cage ring (22) has a coupling area (22b) via which the inner cage ring (22) can be coupled to an actuator (80), wherein the outer cage ring (23) has a coupling area (23b) via which the outer cage ring (23) can be coupled to the actuator (80), wherein the coupling area (22b) of the inner cage ring (22) and the coupling area (23b) of the outer cage ring (23) are designed such thatthat the inner cage ring (22) is rotatable relative to the outer cage ring (23) in response to an action on its coupling area (22b), wherein the coupling area (22b) of the inner cage ring (22) has an inner cage groove (22c) for receiving an engagement element (43, 93), wherein the inner cage groove (22c) extends along a path which runs at least partially obliquely to the circumferential direction of the inner cage ring (22).

Description

Technical field

[0001] The present invention relates to a double cage for a clamping element freewheel, a switchable clamping element freewheel and a coupling arrangement with a switchable clamping element freewheel. State of the art

[0002] The use of sprag clutches to transmit direction-dependent torque is known. With such sprag clutches, torque transmission is dependent on the direction of rotation. The design of sprag clutches makes it possible to transmit direction-dependent torque without the active intervention of an actuating mechanism. This is a significant advantage over other switching elements, such as a positive-locking jaw clutch or a friction-locked multi-plate clutch.

[0003] However, the operating principle of clamping element freewheels described above has so far prevented the use of clamping element freewheels in arrangements where no torque transmission is intended.

[0004] US 3 164 234 A shows a freewheel clutch with electrical power supply. DE 41 19 095 A1 describes a switchable clamping element freewheel. Description of the invention

[0005] The aim is to provide an improved clamping element freewheel. This task is accomplished by the independent patent claims.

[0006] The present invention relates to a double cage for a sprag clutch. The double cage comprises an inner cage ring and an outer cage ring. The inner cage ring is arranged radially inside the outer cage ring. The inner cage ring has a sprag area for receiving sprags. The outer cage ring also has a sprag area for receiving the sprags. Consequently, an arrangement is provided in which the sprags of the sprag clutch can be received in both the outer and inner cage rings.

[0007] The inner and outer cage rings can have several radially extending recesses for receiving the clamping elements. Each ring has a plurality of recesses corresponding to the number of clamping elements to be received. The recesses are dimensioned to allow the clamping elements to extend through both the inner and outer cage rings. Furthermore, the recesses are designed to allow the clamping elements some play, enabling them to move. The clamping element areas of the inner and outer cage rings are preferably positioned in the same direction along the axis of the double cage.

[0008] At least one of the inner and outer cage rings is designed such that it is actively adjustable relative to the other cage ring. Relative adjustability refers specifically to a rotation of the inner and outer cage rings relative to each other. The adjustability described here includes movement of the inner cage ring relative to the outer cage ring, movement of the outer cage ring relative to the inner cage ring, and movement of the inner and outer cage rings in opposite directions. Adjusting the inner and outer cage rings relative to each other results in a displacement of the clamping element receiving areas relative to each other, thereby influencing the clamping element's mobility.

[0009] In the context of this disclosure, active adjustability is understood to mean adjustability that is effected by the application of a force to the inner cage ring and / or the outer cage ring. The force applied to move the inner cage ring and / or the outer cage ring is provided, in particular, outside the double cage. A force applied to the cage rings by one of the clamping elements, caused by movement of a clamping element due to corresponding contact with a cage ring, is not to be considered a force that effects active adjustment within the meaning of this disclosure. Rather, the inner cage ring and / or the outer cage ring are designed to be able to receive an external force for adjustment as described above.

[0010] The inner cage ring has a coupling area via which it can be coupled to an actuator. This coupling area can be located in an extended section of the inner cage ring. More precisely, the coupling area can be located in a section of the inner cage ring that is axially adjacent to the clamping element area of ​​the inner cage ring.

[0011] The inner cage ring can be hollow-cylindrical, at least in sections. In particular, the clamping element area of ​​each cage ring can be hollow-cylindrical.

[0012] The outer cage ring has a coupling area via which it can be coupled to the actuator. The outer cage ring can also have a coupling area that is axially adjacent to the clamping body area of ​​the outer cage ring.

[0013] The coupling areas of the respective cage rings can be located adjacent to the clamping body areas. Preferably, the clamping body areas and the coupling areas are formed in one piece. The coupling areas can therefore be considered extensions of the clamping body areas.

[0014] The active adjustability of the inner cage ring and outer cage ring described above is therefore realized by the fact that the inner cage ring and the outer cage ring can be coupled to an actuator via corresponding coupling areas.

[0015] The coupling areas of the inner cage ring and the outer cage ring are designed such that the inner cage ring can rotate relative to the outer cage ring in response to an action on its coupling area. The coupling areas of the inner cage ring and the outer cage ring can be operatively connected in a suitable manner to effect this rotation.

[0016] The coupling area of ​​the inner cage ring has an internal cage groove for receiving an engagement element. The internal cage groove can be a through groove that extends completely through the coupling area of ​​the inner cage ring in a radial direction.

[0017] In the context of this disclosure, an engagement element is understood to be an arrangement in which at least a portion of the engagement element is located within the inner cage groove. The engagement element may, for example, be a bolt or a pin. Furthermore, the engagement element may be a projection of a switching element (not shown in detail), which in turn is operatively connected to the actuator mentioned above. The engagement element may, in particular, be designed to extend radially along the double cage. Furthermore, the engagement element may be designed to be located radially within the coupling area of ​​the inner cage ring and thus project from the inside into the inner cage groove.However, it is also conceivable that the engagement element is provided radially outside the coupling area of ​​the inner cage ring and extends radially inwards with respect to the inner cage ring, and therefore protrudes from the outside into the inner cage groove.

[0018] The inner cage groove extends along a path that runs at least partially obliquely to the circumferential direction of the inner cage ring. In this way, in conjunction with the engagement element described above, a mechanism can be created in which axial movement of the engagement element results in a rotational movement of the inner cage ring. Such a design can also be described as a cam track.

[0019] The coupling area of ​​the outer cage ring can have an outer cage groove for receiving the engagement element. The outer cage groove can extend along an axial direction of the outer cage ring. In other words, the outer cage groove can extend along a path that is essentially perpendicular to the circumferential direction of the outer cage ring. If the engagement element is engaged with the outer cage groove and is moved axially, the outer cage ring will not rotate. Rather, such a coupling prevents rotation of the outer cage ring. If the outer cage groove is designed in this way and the engagement element is engaged with both the outer cage groove and the inner cage groove described above, axial movement of the engagement element will only cause the inner cage ring to rotate relative to the engagement element.

[0020] According to a preferred embodiment, a switchable clamping element freewheel is provided, which has a double cage as described above. Furthermore, the switchable clamping element freewheel has clamping elements which are received in the clamping element areas of the inner cage ring and the outer cage ring. Due to the double cage design described above, the mobility of the clamping elements can be adjusted by actively moving one of the inner cage ring and the outer cage ring relative to the other.

[0021] The inner and outer cage rings can be brought into an operating position in which the clamping elements are movable such that they can engage with an outer section and an inner section. In other words, in the operating position, the clamping elements are able to straighten up and cause a clamping action. In the context of this disclosure, an outer section and an inner section can each be understood as a separate element or a portion of a separate part. For example, an outer section can comprise a portion of a shaft, in particular a hollow-shaft-like portion or section. An inner section can comprise a portion of a shaft, in particular a solid-shaft section.

[0022] Furthermore, the inner and outer cage rings can be moved into a rest position in which the movement of the clamping elements is restricted to such an extent that engagement with the outer and inner sections is prevented. By rotating the inner and outer cage rings relative to each other, a freewheel function can therefore be selectively activated or deactivated.

[0023] A restriction on the mobility of the clamping elements can be understood as a limitation such that the clamping elements can come into contact with the inner and outer sections, but are unable to fully straighten up and wedge themselves between the inner and outer sections. Preferably, however, a restriction on the mobility of the clamping elements is understood as a limitation in which the movement of the clamping elements is restricted to such an extent that the clamping elements cannot come into contact with the inner and outer sections. In this way, losses due to friction between the clamping elements and the outer or inner section can be avoided. A restriction on the mobility of the clamping elements can also be understood as a fixation of the clamping elements, i.e., a state in which the clamping elements can no longer move.

[0024] The switchable clamping element freewheel can further include an actuator for adjusting at least one of the inner cage ring and the outer cage ring relative to the other of the two cage rings.

[0025] Furthermore, the switchable clamping element freewheel can have a coupling device for operatively connecting the actuator to at least one of the inner cage rings and the outer cage ring. The operative connection is such that actuation of the actuator causes the active adjustment.

[0026] The coupling device can be provided to be translationally movable along an axial direction of the double cage.

[0027] The coupling device can have an engagement element that engages with the inner cage ring and the outer cage ring. The engagement element can be designed as described above, for example, in the form of a bolt or a projection.

[0028] The actuator may include a lifting actuator connected to the coupling device. For example, the actuator may be a bistable single-coil actuator whose armature can be moved between two end positions.

[0029] The actuator may have a spindle drive connected to the coupling device.

[0030] According to a preferred embodiment, a coupling arrangement is provided for connecting and disconnecting two shafts in a vehicle's drivetrain, wherein the coupling arrangement includes a switchable clamping element freewheel located between the shafts, as described above. The clamping element freewheel is provided to selectively allow or prevent torque transmission depending on the direction of rotation. The coupling arrangement can be used for axle disengagement in an all-wheel drive system.

[0031] Thus, a coupling arrangement is created that allows the coupling and uncoupling of two shafts, but requires no sensors. Such a coupling arrangement is therefore more cost-effective than an alternative coupling arrangement. While, for example, the use of a jaw coupling requires synchronization of the rotational speeds, the complexity in this respect can be significantly reduced with the coupling arrangement described above or by using the switchable freewheel according to the present disclosure.

[0032] According to the present disclosure, the clamping element freewheel is designed such that the behavior inherent in a freewheel can be influenced. According to the present disclosure, the locking or freewheeling direction of the clamping element freewheel can now be activated or deactivated. This switchability allows friction-lock couplings or positive-locking jaw couplings to be replaced in certain applications by arrangements that utilize the switchable freewheel described above. With the described switchable clamping element freewheel, the separation function of two shafts can be implemented much more simply.

[0033] As already explained above, the double cage or clamping element freewheel described above with this double cage is a design implementation in which the clamping elements are influenced in their movement by radially rotating the inner cage ring in such a way that no transmission of torque can take place at corresponding speed ratios.

[0034] This can be achieved by a number of cam tracks located on the outwardly extended cages, more precisely in the coupling areas of the cage rings mentioned above. As already explained, the clamping elements, arranged in two cage rings, are held between an inner and an outer section. Furthermore, a spring can be provided that acts on the clamping elements in such a way that they exhibit a rapid response when a suitable speed ratio between the inner and outer sections is achieved. The spring can be positioned between the inner and outer cage rings.

[0035] An axial displacement of the engagement elements, such as pins, guided in the cam tracks creates a rotation between the outer and inner cage rings. This allows the clamping elements to be controlled in their movement so that they do not come into contact with the inner or outer section. If the pins guided in the cam tracks are axially displaced in the opposite direction, allowing the clamping elements to resume their defined movement, the locking direction of the clamping element freewheel is reactivated.

[0036] Activation and deactivation can occur in an unloaded state, for example, when the outer and inner sections are stationary. The arrangements described above have the advantage that the required axial actuation forces are significantly lower compared to claws or couplings, and no special control system is necessary.

[0037] It is also possible to implement coupling arrangements in which the switchable freewheel described above is combined with a conventional freewheel. In this way, torque can be transmitted selectively in both directions, thus creating a rotationally fixed coupling between two elements, such as shafts. One of the shafts could, for example, be a side shaft of a drive axle. Brief description of the characters Fig. Figure 1 shows a sectional view of a coupling arrangement with a switchable clamping element freewheel. Fig. Figure 2 shows a cross-sectional view of the switchable clamping element freewheel. Fig. Figure 3 shows a longitudinal section view of the clamping element freewheel as well as an enlarged perspective view of elements of the clamping element freewheel. Fig. Figure 4 shows another embodiment of a coupling device in longitudinal section view. The Fig. 5 and Fig. 6 show detailed views of the in Fig. 4 coupling arrangement shown. Detailed description of embodiments

[0038] In Fig. Figure 1 schematically shows a coupling arrangement 10 for coupling and uncoupling two shafts 60, 70 in a vehicle's drive train. More precisely, in Fig. Figure 1 shows a longitudinal section through the coupling assembly 10. In the illustrated embodiment, the shaft 60 is a drive shaft of the coupling device 10. The drive shaft is connected to a differential (not shown). The shaft 70 is an output shaft of the coupling device 10 and, in the illustrated embodiment, a side shaft of a drive train.

[0039] In addition to the shafts 60 and 70 already mentioned, the coupling arrangement 10 according to this embodiment has two freewheels 20 and 50. The freewheels 20 and 50 are provided between an outer section 61 of the shaft 60 and an inner section 71 of the shaft 70 to enable a predetermined transmission of torque between the shafts 60 and 70. In the arrangement shown, the freewheels 20 and 50 are arranged such that their locking and freewheeling directions are opposite.

[0040] At the in Fig. In this embodiment, the freewheel 20 located to the right of the freewheel 50 is a switchable clamping element freewheel 20. The switchable clamping element freewheel 20 can be switched between an operating state and a rest state. In the operating state, the switchable clamping element freewheel 20 functions like conventional clamping element freewheels and transmits a torque between the individual sections 61, 72 of the shafts 60, 70, depending on the direction of rotation. In the rest state, the clamping element freewheel 20 is inactive and transmits no torque between the shafts 60, 70. Therefore, torque transmission via the clamping element freewheel 20 can be selectively switched on and off.

[0041] An actuator 30 is provided for actuating the clamping element freewheel 20, or for switching the clamping element freewheel 20 from the rest state to the operating state and vice versa. The actuator 30 is connected to the switchable clamping element freewheel 20 via a coupling device 40.

[0042] The more detailed construction of the switchable clamping element freewheel 20 is described below with reference to the Fig. 2 and Fig. 3 explained in more detail. Fig. Figure 2 shows a cross-sectional view of the switchable clamping element freewheel 20 in an area where clamping elements 24 of the clamping element freewheel 20 are arranged. This area is hereinafter also referred to as the clamping element area.

[0043] The clamping element freewheel 20 has a double cage 21. The double cage 21 has an inner cage ring 22 and a radially outwardly arranged outer cage ring 23. The inner cage ring has a plurality of recesses 22d and the outer cage ring 23 has a plurality of recesses 23d. Clamping elements 24 are arranged in the recesses 22d and 23d. One clamping element 24 is received in each of the recesses 23d of the outer cage ring 23 and 22d of the inner cage ring 22. The recesses 22d and 23d are dimensioned such that the clamping elements 24 are received with clearance relative to the individual recesses. In this way, the clamping elements 24 can move freely during the Fig. 2 in the arrangement shown in the recesses 22d, 23d move and, with corresponding rotation of the inner section 71 and the outer section 61, stand upright and cause a wedge effect between the inner section 71 and the outer section 61.

[0044] To facilitate the engagement of the clamping elements 24 with the inner section 71 and the outer section 61, a spring is provided between the inner cage ring 22 and the outer cage ring 23. This spring exerts a force on the clamping elements 24, assisting in their uprighting. The spring 25 thus pre-tensions the clamping elements 24 in an uprighting direction, so that their contact surfaces bear against the inner section 71 and the outer section 61, respectively, with a predetermined force.

[0045] In the embodiment shown, the inner cage ring 22 and the outer cage ring 23 are rotatable relative to each other. A mechanism that enables such rotatability will be described later with reference to Fig. 3. This is discussed in more detail. The rotation of the cage rings 22, 23 relative to each other leads to a displacement of the recesses 22d and 23d relative to each other, thereby actively influencing the mobility of the clamping elements 24. The two recesses 22d and 23d can be positioned relative to each other for each clamping element 24 in such a way that the clamping element 24 can no longer fully straighten up and thus no clamping effect can be generated between the inner section 71 and the outer section 61.

[0046] On the left side in Fig. Figure 3 shows a longitudinal section view through the clamping element freewheel 20. On the right side of Fig. Figure 3 shows a perspective view of a section of the inner cage ring and the outer cage ring. As mentioned above, both the inner cage ring 22 and the outer cage ring 23 have a clamping element area 22a and 23a, respectively. The recesses 22d and 23d described above are located in these clamping element areas. Furthermore, the inner cage ring 22 and the outer cage ring 23 each have a coupling area 22b and 23b, respectively, by means of which the double cage 21 is operatively connected to an actuator 30.

[0047] In the illustrated embodiment, the actuator is a bistable single-coil actuator capable of adjusting an armature 31 between two end positions. The armature 31 also has a coupling section 33. A coupling element 34 in the form of a sliding piece is provided on the coupling section 33 and is fastened to the coupling section 33 by a screw. The coupling section 33 is a shaft section, and in the illustrated embodiment, the coupling element is designed such that it projects radially outwards from the coupling section 33.

[0048] As further explained in Fig. As shown in Figure 3, the actuator 30 is connected to the double cage 21 via a coupling device 40. In the illustrated embodiment, the coupling device 40 is implemented in the form of an axially movable sleeve 41. The sleeve 41 has an actuating section 42 for coupling the sleeve to the inner cage ring and the outer cage ring. An engagement element 43 in the form of a radially inwardly extending bolt is provided in the actuating section 42. More precisely, the engagement element 43 projects radially inward from the sleeve 41.

[0049] In the axial direction adjacent to the actuating section, the sleeve 41 has a coupling section 45 for coupling with the actuator 30. The coupling section 45 has a groove 46 on its inner side, extending circumferentially around the sleeve 41. The coupling element 34 of the actuator 30, described above, is received in this groove 46 such that the sleeve 41 can rotate relative to the coupling element 34 and the armature 31 of the actuator 30. The armature 31 of the actuator 30 is thus held rotationally fixed in the arrangement, whereas the sleeve 41 is connected to the actuator in such a way that it can rotate relative to the actuator.

[0050] As can be seen from the left-hand illustration in Fig. As further shown in Figure 3, the actuator 30 has an electromagnet 35 whose winding 36 is designed such that the armature is adjustable in the axial direction. To assist in disengaging the armature 31, a spring 37 is provided which biases the flange 32 and thus the armature 31 in the disengagement direction.

[0051] In the enlarged partial view shown on the right, it can be seen how the engagement element 43 located on the sleeve 41 engages with the inner cage ring 22 and the outer cage ring 23.

[0052] The inner cage ring 22 has an inner cage groove 22c in the form of a recess extending obliquely to the circumferential direction of the inner cage ring 22. The outer cage ring 23 has an outer cage groove 23c in its coupling area 23b in the form of a recess extending in the axial direction of the outer cage ring 23. As can be seen from the left-hand illustration in Fig. 3, the inner cage groove 23c extends at approximately a 45° angle with respect to the axial direction of extension of the inner cage ring 22, thus at a 45° angle to the horizontal. Fig. 3. The outer cage groove 23c, on the other hand, extends in the axial direction of the outer cage ring 23. The engagement element 43 is provided in the arrangement shown such that it is received in both the inner cage groove 22c and the outer cage groove 23c. If the engagement element is displaced axially along the inner cage ring 22 or the outer cage ring 23, the circumferential surface 44 of the engagement element 43 can come into contact with the lateral groove walls. Due to the arrangement of the outer cage groove 23c described above, the side walls of the outer cage groove 23c extend essentially parallel to a central axis of the outer cage ring 23. An axial displacement of the engagement element 43 therefore occurs along the side walls of the outer cage groove 23c. Therefore, in the embodiment shown, no force is applied to the outer cage ring 23 when the engagement element 43 moves in the axial direction.Because the side walls of the inner cage groove 22c are inclined to the axial direction due to the design described above, contact occurs between the circumferential surface 44 of the engagement element 43 and a side wall of the inner cage groove 22c when the engagement element 43 is moved axially. Therefore, depending on the direction of movement, the engagement element 43 exerts a force on one of the side walls of the inner cage groove 22, which acts in the circumferential direction of the inner cage ring 22. An axial movement of the engagement element 43 thus leads to a rotational movement of the inner cage ring 22 relative to the outer cage ring 23. In this way, the position of the recesses 22d and 23d described above is also changed relative to each other, thereby actively influencing the mobility of the clamping elements 24 in these recesses.

[0053] At the in Fig. In the position shown in Figure 3, the armature 31 of the actuator 30 is in an end position in which the engagement element 43 is positioned such that the freewheel is active. In other words, in this position, the recesses 22d and 23d are aligned with each other so that the clamping elements 24 held therein can move as in conventional freewheels. However, if the armature 31 of the actuator 30 is moved to its other end position (not shown), the engagement element 43 is also moved to the right in the illustration, causing the inner cage ring 22 to rotate relative to the outer cage ring 23. In this way, the recesses 22d and 23d are offset from each other so that the clamping elements are tilted in such a way that they can no longer straighten up to transmit a torque. The switchable clamping element freewheel is then in an operating state in which the freewheel is inactive.

[0054] A modification of the coupling device 10 described above is found in the Fig. Figures 4 to 6 are shown. Identical elements are marked with the same reference symbol.

[0055] The in Fig. The coupling arrangement shown in Figure 4 differs from the one in Figure 4. Fig. The coupling arrangement shown in Figure 1 is modified by the fact that the actuator 80 is implemented in the form of a spindle drive. The spindle drive 80 is connected to the switchable clamping element freewheel 20 via a coupling device 90. The more detailed design of this modification is shown in the Fig. 5 and Fig.6. The coupling device 90 is implemented as a sleeve 91. The sleeve 91 has an actuating section 92 and a coupling section 94. Similar to the previous embodiment, in this modification an engagement element 93 is provided in the actuating section 92 of the coupling device 90, which, as in the previously described embodiment, is implemented in the form of a bolt extending radially inwards and, as in the previously described embodiment, engages with the coupling areas 22b, 23b of the double cage 21. The coupling section 94 has an annular groove 95 in its outer circumferential surface.

[0056] As already mentioned, the actuator is designed as a spindle drive. The actuator 80 therefore has a spindle 81 and a spindle nut 82 provided on the spindle, which moves in the axial direction of the spindle 81 in response to a rotation of the spindle 81. A switching fork 83 is coupled to the spindle nut 82. The switching fork 83 is tiltably mounted on a housing 87 of the actuator 80. More precisely, the switching fork 83 is tiltably attached to the housing 87 via a coupling element 86, the coupling element 86 defining a pivot axis. The end of the switching fork 83 located on one side of the coupling element 86 is pivotably connected to the spindle nut 82 via a coupling element 84. The opposite end of the shift fork 83, or the two opposite ends of the shift fork 83, are slidably engaged with the groove 95 by coupling elements 85.In the arrangement shown, a movement of the spindle nut 82 therefore leads to a tilting movement of the switching fork 83, which, due to the connection of the switching fork with the sleeve 91 described above, is converted into a translational movement of the sleeve 91. In this way, a coupling device is again created in which a switching of a switchable clamping element freewheel can be effected by moving a sleeve. Reference sign 10 Coupling arrangement 20 Freewheel 21 double cages 22 inner cage ring 22a Clamping body area 22b Coupling area 22c inner cage groove 22d recess 23 Outer cage ring 23a Clamping body area 23b Coupling area 23c Outer cage groove 23d recess 24 clamping bodies 25 springs 30 actuator 31 anchors 32 flange 33 Coupling section 34 Coupling element 35 Electromagnet 36 windings 37 spring 40 Coupling device 41 Sleeve 42 Actuation section 43 Intervention element 44 Circumferential area 45 Coupling section 46 Nut 50 Freewheel 60 Drive shaft 61 Exterior section 70 Output shaft 71 Interior section 80 Actuator (spindle drive) 81 Spindle 82 Spindle nut 83 shift fork 84 Coupling element 85 Coupling element 86 Coupling element 87 cases 90 Coupling device 91 Sleeve 92 Actuation section 93 Intervention element 94 Coupling section 95 Nut

Claims

[1] Double cage (21) for a clamping element freewheel, comprising an inner cage ring (22) and an outer cage ring (23), wherein the inner cage ring (22) has a clamping element area (22a) for receiving clamping elements (24) and the outer cage ring (23) has a clamping element area (23a) for receiving the clamping elements (24), characterized by, that at least one of the inner cage ring (22) and the outer cage ring (23) is designed to be actively adjustable relative to the other of the outer cage ring (23) and the inner cage ring (22), wherein the inner cage ring (22) has a coupling area (22b) via which the inner cage ring (22) can be coupled to an actuator (80), wherein the outer cage ring (23) has a coupling area (23b) via which the outer cage ring (23) can be coupled to the actuator (80), wherein the coupling area (22b) of the inner cage ring (22) and the coupling area (23b) of the outer cage ring (23) are designed such that the inner cage ring (22) is rotatable relative to the outer cage ring (23) in response to an action on its coupling area (22b), wherein the coupling area (22b) of the The inner cage ring (22) has an inner cage groove (22c) for receiving an engagement element (43, 93), wherein the inner cage groove (22c) extends along a track,which runs at least partially obliquely to the circumferential direction of the inner cage ring (22). [2] Double cage (21) according to claim 1, wherein the coupling area (23b) of the outer cage ring (23) has an outer cage groove (23c) for receiving the engagement element (43, 93) which extends along an axial direction of the outer cage ring (23). [3] Switchable clamping element freewheel (20), with a double cage (21) according to one of claims 1 to 2 and clamping elements (24) received in the clamping element areas (22a, 23a) of the double cage (21), wherein the mobility of the clamping elements (24) is adjustable by active adjustment of one of the inner cage ring (22) and the outer cage ring (23) relative to the other of the outer cage ring (23) and the inner cage ring (22). [4] Switchable clamping element freewheel (20) according to claim 3, wherein the inner cage ring (22) and the outer cage ring (23) can be brought into an operating position in which the clamping elements can be moved so that they can engage with an outer section (61) and an inner section (71), and can be brought into a rest position in which the movement of the clamping elements (24) is restricted so that engagement with the outer section (61) and the inner section (71) is prevented. [5] Switchable clamping element freewheel (20) according to claim 4, further comprising an actuator (30; 80) for adjusting at least one of the inner cage ring (23) and the outer cage ring (24) relative to the other of the two cage rings. [6] Switchable clamping element freewheel (20) according to claim 5, further comprising a coupling device (40; 90) for connecting the actuator to at least one of the inner cage ring (22) and the outer cage ring (23) such that actuation of the actuator (30, 80) causes the active adjustment. [7] Switchable clamping element freewheel (20) according to claim 6, wherein the coupling device (40, 90) is designed to be translationally movable along an axial direction of the double cage. [8] Switchable clamping element freewheel (20) according to claim 7, wherein the coupling device (40, 90) has an engagement element (43, 93) which engages with the inner cage ring (22) and the outer cage ring (23). [9] Switchable clamping element freewheel (20) according to one of claims 5 to 8, wherein the actuator (30) has a lifting actuator connected to the coupling device (40). [10] Switchable clamping element freewheel (20) according to one of claims 5 to 9, wherein the actuator (80) has a spindle drive (80) connected to the coupling device (90). [11] Coupling arrangement (10) for coupling and uncoupling two shafts (60, 70) in a drive train of a vehicle, wherein the coupling arrangement (10) has a switchable clamping element freewheel (20) arranged between the shafts (60, 70) according to one of claims 3 to 10, which is configured to selectively allow or prevent a torque transmission dependent on the direction of rotation.

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