Adjustment device for operating a parking lock for a vehicle and parking lock for a vehicle with such an adjustment device

Abstract

The invention relates to an adjusting device for actuating a parking lock for a vehicle, characterized in that a cam disk (1) is provided which can be driven by an actuator (2) and which interacts with an actuating unit (6) arranged slidably perpendicular to the axis of rotation (3) of the cam disk (1, 14) for actuating the parking lock, such that in only one direction of rotation of the cam disk (1, 14) the actuating unit (6) can be moved back and forth between a position (P) activating the parking lock and a position (NP) deactivating the parking lock. The invention further relates to a parking lock for a vehicle with such an adjusting device.

Description

[0001] The invention relates to an adjusting device for actuating a parking lock for a vehicle. The invention further relates to a parking lock for a vehicle with such an adjusting device.

[0002] From DE 10 2021 209 052 A1, an actuating device for a parking lock for a motor vehicle is known. The actuating device comprises an actuating element that is movably mounted and designed to engage a parking lock pawl with a parking lock wheel of the parking lock in order to secure the motor vehicle against unintentional rolling away.

[0003] The invention is therefore based on the objective of proposing an adjusting device and a parking lock of the aforementioned type, which enable simple operation of the parking lock and are structurally simple and cost-effective.

[0004] The problem is solved by the features of claim 1 and alternatively by the features of claim 10. Further advantageous and claimed embodiments emerge from the respective subclaims, the description, and the drawings.

[0005] Thus, an adjustment device for actuating a parking lock for a vehicle is proposed. To enable simplified operation and a structurally simple and cost-effective design, a cam disk driven by an actuator about a rotary axis is provided. This cam disk, to transmit a thrust movement perpendicular to the rotary axis, interacts with an actuating unit, which is slidably arranged perpendicular to the rotary axis, to actuate the parking lock, such that in only one direction of rotation of the cam disk, the actuating unit can be moved back and forth between a position activating the parking lock and a position deactivating the parking lock.

[0006] In this way, an adjustment device with a cam disc is implemented, which linearly actuates the parking lock from a rotary motion. Furthermore, the parking lock is actuated in only one direction of rotation of the cam disc, thus enabling the use of a simple and cost-effective unidirectional actuator that only acts in one direction. Additionally, force can be directly transmitted through the cam disc to the actuating unit to move it. This eliminates the need for additional transmission elements. Moreover, it allows the actuator to be positioned as close as possible to the parking lock.

[0007] Furthermore, the cam disc, and thus also the actuator driving the cam disc, can be positioned perpendicular to the displacement axis in any circumferential position. This makes the adjustment device particularly easy to adapt to the respective installation conditions.

[0008] In a preferred embodiment of the invention, the cam disc with a control cam engages a flat contact surface on the actuating unit at the level of its center of gravity. In this way, optimal, moment-free axial force transmission to the actuating unit can be achieved, and operational malfunctions can be reliably avoided.

[0009] An advantageous embodiment of the invention provides that the cam disc forms a control cam with a first cam section which, in plan view, extends with increasing curvature towards a vertex and serves to set the position that deactivates the parking lock. When the cam disc rotates, the first cam section enables a smooth, controlled force application to the actuating unit with a gradually increasing force until the vertex, at which the position that deactivates the parking lock is reached. An abrupt increase in force is avoided.

[0010] Preferably, a second curve section, extending straight in plan view and following the apex and the first curve section, is provided for resetting to the position activating the parking lock. At the second curve section, a rapid switch to resetting to the position activating the parking lock is achieved with a further rotation of the cam disk, with the apex serving as the transition point.

[0011] Preferably, the control curve of the cam disc has, in top view, a third curve section extending in a circular arc for setting and holding the position that activates the parking lock.

[0012] A further advantage can be achieved by preferably providing a transition section on the control cam, running straight between the third and first cam sections in plan view. This transition section allows the cam disk to initially engage with the actuating unit during rotation with little or no force being applied to the latter.

[0013] Alternatively, the cam disc can have a control cam with, in plan view, arc-shaped curve sections of varying curvature in the area of ​​two vertices, each connected by straight curve sections as a transition. When the cam disc is rotated in the area of ​​the vertices, the adjusting device reaches the position that activates or deactivates the parking lock.

[0014] In a further preferred embodiment of the invention, the actuating unit interacts with a return spring to reverse the thrust motion transmitted by the cam. In a particularly simple manner, the actuating unit can thus be biased against the thrust motion transmitted by the cam by means of a return spring. At the same time, this allows the actuating unit to be biased against the cam to capture the thrust motion transmitted by it.

[0015] In a further particularly preferred embodiment of the invention, the actuating unit is slidably arranged between two parallel side supports. Preferably, it is slidably guided on guide rails on the sides not facing the side supports. Preferably, the latter are at least partially supported on the side supports.

[0016] Preferably, the actuating unit is designed such that, in the installed position, it is guided slidably on a guide rail on the underside facing the parking lock and on the top side facing away from it.

[0017] In a further preferred embodiment of the invention, the actuating unit is designed as a sliding carriage.

[0018] Preferably the actuating unit is designed with two side supports spaced parallel to each other and running parallel to the displacement axis, which are connected to each other at their axial ends via a flat crossbeam.

[0019] Preferably, the cam disc engages at a first axial end on a first cross member, and the return spring means engage at a second axial end on a second cross member to reset the actuating unit.

[0020] In this way, the crossbeams each form a support for the side plates and simultaneously the point of application for both the cam disc for transmitting a thrust force and for the return spring elements for transmitting a preload force opposite to the thrust force to the actuating unit. This enables a particularly compact arrangement of the actuating unit.

[0021] It is also advantageous to use sheet metal as the material, particularly for the components of the actuating unit and the supporting side beams. This reduces the mass and weight of these components and makes them particularly easy and cost-effective to manufacture using sheet metal processing methods. For example, they can be designed as stamped or stamp-bent components, each produced in a single operation by stamping or by stamping and bending, respectively.

[0022] Preferably, the actuating unit is designed as a sliding carriage, making it particularly lightweight, simple, and cost-effective, constructed from sheet metal. Preferably, the side supports are designed as flat side plates and the cross supports as flat cross plates. The latter are arranged with their wide, flat sides aligned with the surface normal in the direction of the sliding axis.

[0023] In a further advantageous embodiment of the invention, the actuating unit interacts with a pawl via a roller mechanism arranged between and supported on its side supports. This pawl engages with a locking toothing on a parking lock wheel to lock a transmission shaft of the vehicle.

[0024] The problem according to the invention is also solved by a parking lock for a vehicle with an adjustment device described above. This results in the advantages already described above.

[0025] Preferably, the axis of rotation of the cam disc of the adjusting device, and thus the actuator that drives it in rotation, is arranged perpendicular to the axis of rotation of a parking lock wheel provided for locking a transmission shaft of the vehicle.

[0026] Alternatively, the axis of rotation of the cam disc, and thus the actuator that drives it to rotate, can also be arranged parallel to the axis of rotation of the parking lock wheel.

[0027] Further claimed features of the invention will become apparent from the following description and from the drawings, which further explain the present invention. The drawings show: Fig. 1 an adjusting device according to the invention for actuating a parking lock for a vehicle and a parking lock according to the invention with such an adjusting device in an activated operating state in a first embodiment, Fig. 2 the adjustment device and the parking lock in a perspective, partially cutaway view, Fig. 3 the adjustment device and the parking lock Fig. 2 in a partially cut-away perspective side view, Fig. 4 the adjustment device and the parking lock in deactivated operating state in a partially cut-away perspective side view, Fig. 5 the adjustment device and the parking lock Fig. 3 in a partially cutaway view and with hidden body edges, Fig. 6 the adjustment device and the parking lock Fig. 4 in a partially cutaway view and with hidden body edges, Fig. 7 the adjusting device Fig. 3 in a partial top view, Fig. 8 the adjusting device Fig. 4 in a partially cutaway top view, Fig. 9 the adjusting device Fig. 3 and Fig. 5 in a partial top view, Fig. 10 the adjusting device from Fig. 4 and Fig. 6 in a partially cutaway top view, Fig. 11 a single view of the cam disc of the adjusting device in a top view, Fig. 12 a single view of a preferred alternative embodiment of the cam disk of the adjusting device in a top view, Fig. 13 an adjusting device according to the invention for actuating a parking lock for a vehicle and a parking lock according to the invention with such an adjusting device in an activated operating state in a second embodiment, Fig. 14 the adjustment device and the parking lock Fig. 13 in a perspective view with one actor, Fig. 15 the adjustment device and the parking lock Fig. 13 and Fig. 14 in a partially cut-away perspective side view, Fig. 16 the adjustment device and the parking lock in deactivated operating state in a partially cut-away perspective side view, Fig. 17 the adjustment device and the parking lock Fig. 15 with concealed body edges, Fig. 18 the adjusting device and the parking lock Fig. 16 with concealed body edges.

[0028] The figures illustrate various views and embodiments of an adjusting device for actuating a parking lock for a vehicle. These illustrations also clarify the parking lock according to the invention with such an adjusting device.

[0029] The adjusting device has according to Fig. Figures 1 to 10 show a cam disk 1, which can be driven by an actuator 2 (indicated by dashed lines) to rotate about an axis of rotation 3. The cam disk 1 can be driven directly via a shaft 4, preferably the actuator shaft, in particular the rotor shaft. It interacts directly with an actuating unit 6, which is arranged to be displaceable perpendicular to the axis of rotation 3 along an imaginary displacement axis 5, for linear actuation. The actuating unit 6, in turn, acts on a pivotably arranged pawl 7 to actuate the parking lock. In this arrangement, the actuator 2 can be positioned as close as possible to the pawl 7.

[0030] The cam disk 1 forms a control cam 31 at its circumferential edge. The actuating unit 6, which is spring-loaded by return spring means 13, engages the thrust movement resulting from a rotation of the cam disk 1 in the direction of the displacement axis 5 as shown in Fig. 2 indicated by an arrow.

[0031] The cam disk 1 can be mounted on the shaft 4 in the actuator 2 and / or on a stationary component, in particular the vehicle's gearbox housing. Mounting 59 on a stationary component, in particular the gearbox housing, is indicated by dashed lines.

[0032] The locking pawl 7 engages in the Fig. 1 and Fig. Figure 2 shows the pivoted, activated operating state of the parking lock with a locking tooth 8 engaging in the toothing of a parking lock wheel 9 of the parking lock. The parking lock wheel 9 is arranged on a transmission shaft (not shown), preferably an intermediate shaft, of the vehicle and is non-rotatably connected to it, thus blocking the transmission to prevent the vehicle from rolling away unintentionally when parked.

[0033] The axis of rotation 3 of the shaft 4 driving the cam disk, and thus the actuator 2, are therefore arranged perpendicular to the displacement axis 5 and perpendicular to the indicated axis of rotation 10 of the ratchet wheel 9 or the transmission shaft of the vehicle.

[0034] The cam disk 1 has a continuous central receiving opening 11, through which the cam disk 1 driving shaft 4 is passed and is connected to the cam disk 1 in a rotationally fixed manner for the transmission of a torque.

[0035] The cam disk 1 and the actuating unit 6 are arranged loosely adjacent to one another. In this way, the cam disk 1 and the actuating element 6 are decoupled from tensile forces, so that only axial thrust forces can be transmitted between them. The cam disk 1 engages with the control cam 31 formed on its circumferential edge, directly and centrally at an axial end of the actuating unit 6 at the level of its center of gravity, on a flat contact surface 12.

[0036] At the other axial end of the actuating unit 6, the return spring means 13 engage with a preload opposing the thrust movement transmitted by the cam disk 1. The return spring means 13 are preferably designed as helical compression springs.

[0037] In Fig. 11 is the cam disc 1 from the Fig. Numbers 1 to 10 and 13 to 18 are shown in a top view. Fig. Figure 12 also shows a preferred variant of the cam disc 14 in a top view.

[0038] By completing one full rotation of the cam disk 1, 14 around the axis of rotation 3, the parking lock can be moved by the adjusting device from the activating position P to the deactivating position NP and from the latter back to the former. The cam disks 1, 14 each form a control cam 31, 32 at their circumferential edges, with which they engage the actuating surface 12 of the actuating unit 6 by rotating it. The control cams 31, 32 each have two vertices 15, 16 and 17, 18, respectively.

[0039] The cam disc 1 from Fig. 11 forms circular arc-shaped curve sections 19, 20 with different curvatures in the area of ​​the vertices 15, 16, which are each connected to each other by straight curve sections 21, 22 as a transition.

[0040] On a first curve section 19 in the area of ​​a first vertex 15 with smaller curvature, the adjusting device is set or held in position P, which activates the parking lock, during the rotation of the cam disk 1. On a second curve section 20 in the area of ​​a second vertex 16 with larger curvature, the adjusting device is set or held in position NP, which deactivates the parking lock, during the rotation of the cam disk 1.

[0041] The Fig. The particularly preferred cam 14 shown in Figure 12 comprises a first curve section 23 extending towards a first vertex 17 with increasing curvature, a straight second curve section 24 immediately adjoining the first vertex 17 and the first curve section 23, a third curve section 25 extending in a circular arc in the area of ​​a second vertex 18, and a straight transition section 26 between the third curve section 25 and the first curve section 23.

[0042] During the clockwise rotation of the cam disc 14, the adjusting device sets and holds the position NP, which deactivates the parking lock, on the first curve section 23. This first curve section 23 allows for a smooth, controlled force application to the actuating unit 6, with the force gradually increasing until the first apex 17, where the position NP, which deactivates the parking lock, is reached. An abrupt increase in force is avoided.

[0043] A further rotation of the cam disc 14 results in a rapid switch to return to the position P activating the parking lock at the subsequent second curve section 24 in the transition to the third curve section 25, with the first vertex 17 serving as the changeover point.

[0044] A further rotation of the cam disc 14 sets and holds the position P, which activates the parking lock, at the third cam section 25. The transition section 26 allows the cam disc 14 to initially engage the contact surface 12 of the actuating unit 6 with little or no force being applied to the latter.

[0045] The following section describes in more detail how the parking lock is operated using the proposed adjustment device.

[0046] From the activated operating state P, as in Fig. As shown in figures 1 to 3 and 5, 7 and 9, the parking lock is activated by rotating the cam disc 1 counterclockwise, as shown in Fig. 2 and Fig. 7 indicated by two curved arrows on wave 4, in which Fig. 4, Fig. 6, Fig. 8 and Fig. The deactivated operating state P of the parking lock is shown in 10.

[0047] Here, the cam disc 1 at the attack surface 13 imparts a thrust movement to the actuating unit 6 in the direction of the displacement axis 5 in the image plane to the right, as if by a straight arrow. Fig. 2. (Referring to the above.)

[0048] This causes the actuating unit 6 to be displaced to the right in the plane of the image against the spring force of the return spring means 13 acting at the other axial end. The pawl 7, which interacts with the actuating unit 6, is thereby partially disengaged from the teeth of the parking lock wheel 9 by the locking tooth 8.

[0049] By further rotating the cam disk 1 counterclockwise, the actuating unit 1 is moved further axially to the right in the plane of the image and the return spring means 13 which counteract the displacement are further pre-tensioned.

[0050] This moves the pawl 7 with the locking tooth 8 further out of the toothing of the parking lock wheel 9. When the cam disk 1 with its second apex 16 engages the second cam section 20 with the engagement surface 12 of the actuating unit 6, the actuating unit 6 is in its position furthest to the right, as shown in Fig. 4, Fig. 6, Fig. 8 and Fig. Figure 10 shows that the pawl 7 with the locking tooth 8 moves completely out of the toothing of the parking lock wheel 9, thereby transferring the parking lock to the deactivated operating state NP.

[0051] By a further counterclockwise rotation of the cam disc 1, the actuating unit 6, which rests against the cam disc 1, is moved back again by the spring force of the pre-tensioned return spring means 13. When the cam disc 1 again engages the first cam section 19 with the contact surface 12 of the actuating unit 6, the parking lock is returned to the activated operating state P ( Fig. 1 to 3 and 5, 7 and 9).

[0052] In this way, in one direction of rotation of the cam disk 1, and thus in one direction of rotation of the driving shaft 4 or in one direction of rotation of the actuator 2 driving the shaft 4, the actuating unit 6 can be moved back and forth between a position P activating the parking lock and a position NP deactivating it. Consequently, to actuate the parking lock in both operating states P and NP, the proposed adjusting device can be driven in a structurally particularly simple and cost-effective manner by a unidirectional actuator 2, i.e., one that only acts in one direction of rotation.

[0053] The actuating unit 6 is arranged as a sliding carriage between two side supports 27, 28 running parallel to the displacement axis 5, as shown in Fig. 1, Fig. 9 and Fig. 10 shown. The sliding carriage 6 is supported on its underside facing the pawl and the parking lock wheel and on its upper side facing away from these by a guide rail 29, 30 supported on the side carriers 27, 28 and is guided linearly in a slidable manner ( Fig. 1 and Fig. 2).

[0054] The side supports 27, 28 are designed as flat side plates with their wide, flat inner surfaces facing each other. This makes them lightweight and cost-effective, particularly by stamping them from a single strip of sheet metal as a single stamped component. Several spacer elements 60, 61 ( Fig. 1 and Fig. 2), which are preferably arranged at the axial ends of the side carriers 27, 28, these are arranged parallel to each other at a predetermined distance and connected to each other.

[0055] The actuating unit 6 is designed with two flat side supports 33, 34 spaced parallel to each other and running parallel to the displacement axis 5, which are connected to each other at their axial ends via a flat cross support 35, 36 ( Fig. 1, Fig. 2, Fig. 9 and Fig. 10) The guide rails 29, 30, the side supports 33, 34 and the cross supports 35, 36 are each preferably manufactured as flat side or cross plates from a strip of sheet metal by stamping, thereby achieving the aforementioned advantages.

[0056] The crossbeams 35, 36 are aligned with their broad, flat sides in the direction of the displacement axis 5. This allows the cam disk 1 to engage the actuating unit 6 in a particularly simple manner at a first axial end on a first crossbeam 35 and at a second axial end on a second crossbeam 36, the return spring means 13 to act axially against each other. Fig. 1 to 3, 5, 6, 9 and 10). The first crossbeam 35 forms the attack surface 12 on its flat outer side.

[0057] The crossbeams 35, 36 connect and fasten the side beams 33, 34 and together they form the actuating unit 6 as a stable sheet metal sliding carriage. They serve as load-bearing elements for the axial thrust force transmitted by the cam disk 1 and for the opposing axial spring force transmitted by the return spring elements 13, distributing these forces evenly across the side beams 33, 34.

[0058] For axial guidance of the actuating unit 6 on its underside facing the locking pawl 7, a first guide rail 29 is provided as shown in Fig. Figures 2 to 6 show the guide rail 29 being supported and fastened to the side supports 33, 34 by two fastening sections 37, 38 and 39, 40 respectively, which protrude from its narrow material thickness sides facing away from each other and engage in corresponding recesses on these side supports 33, 34. Fig. 1, Fig. 2, Fig. 5 and Fig. 6).

[0059] A second guide rail 30 forms a guide on the upper side of the actuating unit 6, facing away from the pawl 7. The second guide rail 30 engages with two fastening sections 41 and 42, respectively, at one axial end, projecting from its narrow material thickness sides facing away from each other, into corresponding recesses on the side supports 33, 34 for support and fastening. At the other axial end, the second guide rail 30 is fastened to a fastening bolt 43, which passes transversely through the side supports 33, 34, by means of a plastic holder and retaining lugs.

[0060] The actuating unit 6 is supported and linearly guided on the underside facing the pawl 7 with the narrow material thickness sides of the side carriers 33, 34 on first sliding surfaces 44, 45 of the first guide rail 29 ( Fig. 2 to 6). Here, the side supports 33, 34 each have two sections 46, 47 and 48, 49 respectively, separated from each other on their narrow material thickness sides by a concave recess, resting on the first sliding surfaces 44, 45.

[0061] The applicant has discovered through experiments that only partial contact of the side supports 33, 34 with the sliding surfaces 44, 45 ensures a stable sliding movement and in particular avoids jerky sliding as a so-called stick-slip effect.

[0062] On its upper side facing away from the locking pawl 7, the actuating unit 6 is supported and linearly guided by the wide, flat inner surfaces of the side carriers 33, 34 facing each other on second sliding surfaces 50, 51 on the second guide rail 30 ( Fig. 2 to 6). The second sliding surfaces 50, 51 are arranged opposite to each other and perpendicular to the first sliding surfaces 44, 45.

[0063] The side supports 33, 34 can also be guided on the upper side of the actuating unit 6 by their narrow material thickness sides on a stationary component (not shown), for example, the transmission housing of the vehicle. Thus, the actuating unit 6 is guided in a simple manner on its underside, top side, and in both lateral directions.

[0064] After Fig. The actuating unit 6 comprises a roller mechanism arranged between and supported on the side supports 33, 34, preferably with two rollers 52, 53 arranged to roll against each other. One roller 52 interacts with a ramp contour 54 of the pawl 7 ( Fig. 5 and Fig. 6), so that by moving the actuating unit 6 back and forth, the roller 53 runs over the ramp contour 54. The pawl 7 with the locking tooth 8 engages in the locking teeth of the parking lock wheel 9, can be pivoted into position P, which activates the parking lock, and can be pivoted out of the locking teeth again into position NP, which deactivates the parking lock.

[0065] The side supports 34, 35 are according to Fig. 1 and Fig. 2 at the axial end region facing away from the cam disc 1, the side supports 27, 28 are connected via a transversely extending mounting bolt 43 to two flat, parallel mounting brackets 55, 56. The side supports 27, 28 can be attached to a stationary component, for example a housing, in particular the transmission housing of the vehicle, via the latter.

[0066] The pawl 7 is pivotably supported between the mounting brackets 55 and 56 by a mounting bolt 57 that passes transversely through them. Torsion spring elements 58 are attached to an end of the mounting bolt 57 that projects from the outside of a mounting bracket 55. These are preferably designed as torsion springs and are supported with a first free leg on the mounting bracket 55 and with the second free leg on the underside of the pawl 7 facing the parking lock wheel 9, so that the pivoting movement applied by the actuating unit 7 via the roller 52 on the ramp contour 54 can be reversed by the spring force of the torsion spring elements 58.

[0067] In a Fig. In the second embodiment of an adjusting device according to the invention for actuating a parking lock for a vehicle, as illustrated in Figures 13 to 18, the axis of rotation 3 of the shaft 4 driving the cam 1, and thus the actuator 2, is arranged parallel to the indicated axis of rotation 10 of the parking lock wheel 9 or to the transmission shaft of the vehicle, in contrast to the first embodiment. This means that the cam 1 is aligned with its surface normal parallel to the axis of rotation 10 of the parking lock wheel 9.

[0068] For further details and functionality, reference is made to the preceding description of the first embodiment and to the Fig. References are made to numbers 1 to 12.

[0069] After Fig. 13 to 18 is by the adjusting device in a direction of rotation of the cam disk 1 thus in a direction of rotation of the driving shaft 4 or in a direction of rotation of the actuator 2 driving it, the actuating unit 6 for actuating the parking lock between a position P activating it ( Fig. 13 to 15 and 17) and a deactivating position NP ( Fig. 16 and Fig. 18) can be moved back and forth as described above in the first embodiment. List of reference symbols 1 cam disc 2 Actuator 3. Axis of rotation 4 wave 5. Shifting axis 6 Actuating unit, sliding carriage 7 Locking pawl 8 Locking tooth 9 Parking lock wheel 10 Rotation axis 11. Intake opening 12 attack surface 13 Return spring means 14 Cam disc 15 first vertex 16 second vertex 17 first vertex 18 second vertex 19 first curve section 20 second curve section 21 Curve section 22 Curve section 23 first curve section 24 second curve section 25 third curve section 26 Transition section 27 side carriers 28 side carriers 29 Guide rail 30 guide rail 31 Control curve 32 Control curve 33 side carriers 34 side carriers 35 crossbeams 36 crossbeams 37 Fastening section 38 Fastening section 39 Fastening section 40 fastening section 41 Fastening section 42 Fastening section 43 fastening bolts 44 first sliding surface 45 first sliding surface Section 46 Section 47 Section 48 Section 49 50 second sliding surface 51 second sliding surface 52 Rolling Mechanism, Roll 53 Roller Mechanics, Roller 54 Ramp contour 55 mounting brackets 56 mounting brackets 57 fastening bolts 58 Torsion spring elements, torsion spring 59 Storage 60 spacer element 61 spacer element P activating position NP deactivating position QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2021 209 052 A1

[0002]

Claims

[1] Adjusting device for operating a parking lock for a vehicle, characterized by in that a cam disc (1, 14) which can be driven by an actuator (2) to rotate about an axis of rotation (3) is provided, which cam disc cooperates with an actuating unit (6) which is arranged to be displaceable perpendicular to the axis of rotation (3) for actuating the parking lock, in such a way that in only one direction of rotation of the cam disc (1, 14) the actuating unit (6) can be displaced back and forth between a position (P) which activates the parking lock and a position (NP) which deactivates the parking lock. [2] Adjusting device according to claim 1, characterized by that the cam disc (1, 14) acts with a control cam (31, 32) on a flat engagement surface (12) on the actuating unit (6) at the level of the center of gravity of the same. [3] Adjusting device according to one of claims 1 or 2, characterized byin that the cam disc (14) forms a control cam (32) which, in plan view, has a first cam section (23) running towards an apex (18) with increasing curvature for setting the position (NP) deactivating the parking lock and a straight second cam section (24) adjoining the apex (18) and the first cam section (23) for returning to the position (P) activating the parking lock. [4] Adjusting device according to claim 3, characterized by that the control cam (32) has, in plan view, a third cam section (25) running in the shape of a circular arc for setting the position (P) activating the parking lock and a transition section (26) running straight between the third cam section (25) and the first cam section (23). [5] Adjusting device according to one of claims 1 to 4, characterized bythat the actuating unit (6) cooperates with return spring means (13) to reset the thrust movement transmitted by the cam disc (1). [6] Adjusting device according to one of claims 1 to 5, characterized by that the actuating unit (6) is arranged displaceably between two side supports (27, 28) running parallel to the displacement axis (5) of the same and is displaceably guided on guide rails (29, 30) on the sides not directed towards the side supports (27, 28), and the latter are at least partially supported on the side supports (27, 28). [7] Adjusting device according to one of claims 1 to 6, characterized bythat the actuating unit (6) is designed as a sliding carriage with two flat side supports (33, 34) arranged parallel to one another, which are connected to one another at the axial ends thereof via a flat cross support (35, 36), wherein the cam disc (1) acts on a first cross support (35) and the return spring means (13) for returning the actuating unit (7) acts on a second cross support (36). [8] Adjusting device according to one of claims 6 or 7, characterized by that the side supports (22, 23, 39, 40) are designed as flat side plates arranged parallel to one another and the cross supports (35, 36) are designed as flat transverse plates, the latter being aligned with the wide flat sides for engagement of the cam disc (1) and for engagement of the return spring means (13) in the direction of the displacement axis (5). [9] Adjusting device according to one of claims 5 to 8, characterized bythat the actuating unit (6) interacts with a locking pawl (7) for engagement in a locking toothing on a parking lock wheel (9) for locking a transmission shaft of the vehicle via a roller mechanism (52, 53) arranged between its side supports (33, 34) and supported thereon. [10] Parking lock for a vehicle with an adjusting device according to one of claims 1 to 9.

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