Parking lock device for motor vehicle

Abstract

The invention relates to a parking lock arrangement for a motor vehicle for coupling a vehicle transmission having a parking lock to a selector lever coupled to the parking lock, which selector lever can be moved into a parking lock position for engaging the parking lock and out of the parking lock position for releasing the parking lock. The parking lock device comprises a housing element for shielding a switching element from environmental influences, the switching element being designed to switch the parking lock device between a released state and a hooked state of a parking lock of the parking lock device. The parking lock device further comprises a carrier element for holding at least one of the switching elements, and an elastic damping element which is arranged between the housing element and the carrier element.

Description

Technical Field

[0001] The invention relates to a parking lock device for a motor vehicle. Background Art

[0002] In modern motor vehicles, an automatic transmission is usually installed as a vehicle transmission in order to facilitate the operation of the motor vehicle by the driver. The automatic transmission is operated by a sliding switch or a rotary switch, in which, for example, different gear selection levels are adjusted by using a cable traction member and mechanically transmitted to the automatic transmission. If the disturbing noise generated when operating such a switch is as small as possible, the operation and use of such a switch can be achieved particularly comfortably. It should also be possible to prevent liquids from entering such a switch, which are spilled by vehicle occupants in the vehicle and flow through the operating area of ​​the automatic transmission. For this purpose, a high sealing performance of such a switching element with respect to liquids should be ensured in particular. In this case, a sturdy design of the operating element for the parking lock of the automatic transmission is particularly important, because if the parking lock is blocked and cannot be released, problems will occur, especially for the functions of starting or continuing driving. Summary of the invention

[0003] It is therefore an object of the present invention to provide a possibility for improving the functionality of a parking lock.

[0004] This object is achieved by the subject matter of the independent claims.

[0005] The solution presented here relates to a parking lock device for a motor vehicle, which is used to couple a motor vehicle transmission having a parking lock and a shift lever coupled to the parking lock, the shift lever being movable into a parking lock position for engaging the parking lock and being movable out of the parking lock position for releasing the parking lock, wherein the parking lock device has the following features:

[0006] a housing element for shielding a switching element from environmental influences, wherein the switching element is designed to switch the parking lock device between a released state and an engaged state of a parking lock of the parking lock device;

[0007] a carrier element for holding at least one of the switching elements; and

[0008] An elastic damping element which is arranged between the housing element and the carrier element.

[0009] A parking lock device is currently understood to be an element that connects a parking lock of a motor vehicle transmission to a selector lever. A housing element is currently understood to be a component that forms part of a larger housing of a parking lock device and that shields or covers switching elements for moving components or switching the switching state of the parking lock. For example, a support element is understood to be a component on or in which switching elements are held or supported in order to ensure the corresponding functionality of the parking lock when these switching elements are moved. A damping element is currently understood to be an element that absorbs and damps vibrations.

[0010] The presented concept is based on the recognition that by using an elastic damping element arranged between the housing element and the support element, it is possible to achieve a significant reduction in the transmission of disturbing noises to the housing element and thus, for example, also into the interior of the vehicle. This can significantly increase the comfort of the vehicle occupants, since unusual, loud or disturbing noises are avoided as much as possible when the parking lock is actuated. At the same time, the damping element can also achieve an effective sealing of the housing element relative to the support element, so that the switching element protected by the housing element is shielded as much as possible from environmental influences.

[0011] According to an advantageous embodiment of the solution presented here, the damping element can be composed of at least two parts. For example, the at least two parts can be different from each other and can be fastened to each other, for example adhesively bonded. For example, the two parts can have different elasticities in order to achieve the best possible damping effect for vibrations. Such an embodiment offers the advantage that, by using materials with different elasticities for the damping element, on the one hand, a very good contact of the damping element to the carrier element and / or the housing element and, on the other hand, a very high damping effect is achieved. It is also possible to use materials that ensure sealing against undesirable liquids.

[0012] Furthermore, an embodiment of the solution presented here is advantageous in which the damping element is designed as a fluid-tight seal between the housing element and the carrier element. This embodiment of the solution presented here has the advantage that a switching element, for example, installed in the housing of the parking lock device, can be effectively protected from contamination or damage.

[0013] The following embodiments of the solution presented here can absorb vibrations very well, wherein the damping element is designed in annular form, in particular wherein a region of the carrier element or a region of the housing element projects through an opening of the annular damping element. This embodiment offers the advantage that oscillations in multiple degrees of freedom can be absorbed by the annular damping element and thus vibrations can be effectively damped.

[0014] According to a further embodiment of the solution presented here, at least one movable switching element can be guided or supported by a damping element. This embodiment offers the advantage that vibrations caused or propagated by the movable switching element guided or supported by the damping element can be very effectively reduced or damped by means of this arrangement of the damping element.

[0015] According to a further embodiment of the solution presented here, a tensioning element for prestressing the damping element can also be provided, in particular wherein the tensioning element is designed as a wedge-shaped or disk-shaped element which is introduced between the region of the housing element and the region of the carrier element and / or as a tensioning ring for pressing a part of the damping element onto the housing element or the carrier element. This embodiment offers the advantage that the damping element can be prestressed by using the tensioning element and thus, on the one hand, it is possible to prevent the damping element from being squeezed apart or falling off during operation of the parking lock device. At the same time, the damping properties of the damping element installed and prestressed in this way can also be improved.

[0016] According to a further embodiment, the damping element can have a discharge mechanism for discharging liquid accumulated or accumulated on the damping element. This embodiment provides the advantage that liquid that may fall onto the damping element can be effectively discharged and thus the penetration of this liquid into the area between the housing element and the carrier element can be avoided as well as possible.

[0017] Furthermore, an embodiment of the solution presented here is conceivable as a parking lock device for a motor vehicle, which is used to couple a motor vehicle transmission having a parking lock and a shift lever coupled to the parking lock, the shift lever being movable into a parking lock position for engaging the parking lock and being movable out of the parking lock position for releasing the parking lock, wherein the parking lock device has the following features:

[0018] an electric motor which is designed as an actuator for releasing and / or engaging the parking lock;

[0019] a control circuit for controlling the electric motor by means of a control signal; and

[0020] A connecting line, which is used to transmit control signals from the control circuit to the electric motor, wherein the connecting line has a strain relief loop in which the connecting line is not subject to tensile stress.

[0021] A connecting line can be understood, for example, as a signal strand or the like in order to transmit control signals from the driver circuit to the electric motor. A strain relief loop can be understood, for example, as a line guide or a region of a connecting line in which the connecting line is arranged in a curved manner or with a bend so that no stress is generated between the two ends of the connecting line.

[0022] This embodiment of the solution presented here has the advantage that the best possible decoupling of the electric motor from the control circuit is achieved by the strain relief loop of the connecting line, so that the structure-borne noise transmitted via the connecting line is minimized and the acoustic effect when the parking lock device is actuated is thus improved. Faults caused by the plug of the connecting line falling out can also be avoided as much as possible.

[0023] Furthermore, an embodiment of the solution presented here is advantageous in which the connecting line is clamped to at least one housing element for shielding a switching element from environmental influences and / or to a support element for holding at least one of the switching elements, wherein the switching element is designed to switch the parking lock device between a released state and an engaged state of the parking lock of the parking lock device. This embodiment of the solution presented here has the advantage that, on the one hand, the connecting line can be securely fixed in its position and, on the other hand, if necessary, structure-borne sound can also be damped between the housing element or the support element if, for example, the connecting line is used as a damping element.

[0024] In particular, very unpleasant noises may be generated in the event of an overload of the electric motor. In order to achieve the most favorable and quietest possible variant of the parking lock device, a particularly advantageous embodiment of the solution presented here can be configured with a control circuit so as to disconnect the electric motor when an overload of the electric motor is detected. For example, for this purpose, the electric power flowing directly into the electric motor can be detected and compared with a reference power that should flow maximally into the electric motor. If it is now determined that the electric power currently flowing into the electric motor is greater than the reference power, the electric motor can be disconnected or the power output can be reduced, for example.

[0025] In one embodiment, several of the above-mentioned and different features of the parking lock device proposed here can also be combined with one another. Thus, according to the solution presented here, a parking lock device is disclosed, which has the features of the variant of the parking lock device proposed here with a damping element and the features of the variant of the parking lock device proposed here with a connecting line. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Some embodiments of the solutions described herein will be described in more detail with reference to the following drawings.

[0027] Figure 1 A schematic diagram showing a vehicle having a parking lock device according to an embodiment;

[0028] Figure 2 A schematic view of an embodiment of a parking lock device is shown in partially cutaway form;

[0029] Figure 3 Indicates that the parking lock is already in Figure 2 A perspective view of the embodiment shown in FIG.

[0030] Figure 4 A schematic top view showing a further exemplary embodiment of a parking lock device;

[0031] Figure 5 The parking lock device Figure 4 A schematic cross-sectional view of a damping element of the embodiment shown in FIG.

[0032] Figure 6 A schematic diagram showing another embodiment of a parking lock device;

[0033] Figure 7 The parking lock device is shown in Figure 6 A cross-sectional view of a portion of the embodiment shown in FIG.

[0034] Figure 8 A cross-sectional view showing a further embodiment of a parking lock device;

[0035] Fig. 9 A schematic cross-sectional view showing a portion of a parking lock device according to an embodiment;

[0036] Fig.10 A schematic diagram showing a further embodiment of a parking lock device according to one embodiment;

[0037] Fig.11 Show according to Fig.10 A cross-sectional view of an embodiment of a parking lock device; and

[0038] Fig.12 A schematic diagram shows a process for implementing an overload protection, for example, in an actuation circuit of an exemplary embodiment of a parking lock device.

[0039] In the figures described below, identical or similar elements are provided with identical or similar reference numerals, wherein a repeated description of these elements is omitted for the sake of clarity. DETAILED DESCRIPTION

[0040] Figure 1The schematic diagram of a vehicle 100 is shown, in which the driving force generated by a drive motor 105 can be transmitted to wheels 115 of the vehicle 100 via a vehicle transmission 110. The vehicle transmission 110 is designed, for example, as an automatic transmission and comprises a part that serves as a parking brake 120. In order to activate or deactivate the parking brake 120, a parking lock device 125 is provided, by means of which the driving position or parking brake position input by the driver of the vehicle 100 via a selector lever 130 is transmitted to the vehicle transmission 110 or the parking brake 120, wherein the exact design or function of the force transmission from the selector lever 130 to the vehicle transmission 110 or the parking brake 120 in the parking lock device 125 does not need to be considered in detail.

[0041] Figure 2 A schematic view of an embodiment of a parking lock device 125 is shown in partially cutaway form. A housing element 200 and a support element 205 are shown, wherein shift elements 210 are arranged or fastened on the support element 205, which are necessary for transmitting the forces from the selector lever 130 to the vehicle transmission 110. The housing element 200 is provided as a protective element or cover for other components of the parking lock device 250.

[0042] In order to decouple the support element 205 from the housing element 200 as effectively as possible, in particular acoustically, a damping element 215 is arranged between the housing element 200 and the support element 205. Figure 2 In the embodiment of the present invention, the damping element 215 has a rectangular structure in a first part 220 adjacent to the housing element 200, which is composed of a first component or a first material, for example. A second part 225 adjacent to the support element 205 and the first part 220 is made of a second material or a second component different from the first material and is designed as a semi-open tube, for example. Figure 2 , which is, for example, a ring-shaped part that presses the second part 225 onto the support element 205), so that the damping element 215 can now be prevented from slipping off during operation of the parking lock device 125. In particular, the tensioning element 230 can press the second part 225 of the damping element 215 through the opening of the housing element 200 onto the cylindrical recess of the support element 205, so that the damping element 215 is installed essentially horizontally in the parking lock device 125. In addition, liquid accumulated in this area of ​​the damping element 215 can be effectively drained away by the semi-open pipe of the second part 225, so that, for example, damage to the tensioning element 230, for example due to corrosion, can also be avoided as much as possible.

[0043] Figure 3 The parking lock device 125 is shown in FIG. Figure 2, in which the cylindrical recess of the carrier element 205, the tensioning element 230, the sealing element 215 and the housing element 200 can now be seen again. It can also be seen that the sealing element 215 has a drain 300, which is designed, for example, in the form of a V-shaped cutout and is adjacent to the second part 225 of the damping element 215, for example, so that liquid accumulated in this second part 225 can be drained from the damping element 215 via the drain 300. It can also be seen that a plug-in portion leading to one or more switching elements 210 can be installed at the cylindrical recess, so that, for example, an electric motor as a switching element 210 described in more detail below can be supplied with electrical energy and positioning and diagnostic results can be fed back to the vehicle.

[0044] Figure 2 and Figure 3 The embodiment shown in makes it possible to use an acoustically decoupled notch leading to the plug-in connection of the support element 205 and at the same time ensure sealing relative to the vehicle interior via the damping element 215. In this case, relative movements of the housing or housing element 200 can be absorbed by the two-component seal or damping element 215. The retaining ring as the tensioning element 230 ensures sealing relative to the vehicle interior. The discharge mechanism 300 prevents the retaining ring 230 from being damaged, for example by moisture. In particular, an improvement of the parking lock device 125 can be achieved by integrating the functions of acoustic decoupling (i.e. minimizing structure-borne sound) and the sealing function using a two-component seal with a sealing lip.

[0045] Figure 4 1 shows a schematic top view of a further embodiment of a parking lock device 125, wherein three annular damping elements 215 can now be seen from the top view, which connect the housing element to the support element 205, in which the corresponding switching elements 210 are arranged. The support element 205 and the switching element 210 can be seen through the schematic opening in the housing element 200, which is Figure 4 The components are only drawn in order to illustrate the individual components, but do not exist in the actual implementation of the parking lock device 125 .

[0046] Figure 5 Shown according to Figure 4 Schematic sectional view of a damping element 215 of the exemplary embodiment shown in . It can be seen here that the housing element 200 comprises a pin 500 which is guided through an opening of the damping element 215 so that the pin 500 presses the damping element 215 outwards and thus onto the edge of the support element 205, for example. In this way, very effective damping of vibrations in multiple degrees of freedom from the support element 205 to the housing element 200 can be achieved. At the same time, Figure 5A tensioning element 230 in the form of a gasket is shown, which is introduced between the housing element 200 and the supporting element 205, for example as a wedge, and is used to pull or push the pin 500 upwards and thus keep the damping element 215 in a pre-tensioned state, so that the damping element 215 can cause the most effective damping of vibrations.

[0047] therefore, Figure 4 and Figure 5 The embodiment shown in shows a possibility of acoustically decoupling the cable pull actuator as a parking lock device 125 from the vehicle interior in order to achieve the desired acoustic goals. Here, both the inherent excitation and the pulses from the transmission (which are caused, for example, by the movement of the switching element 210) are damped. The system is decoupled from the vehicle interior via an adapter. This decoupling is achieved via rubber dampers as damping elements 215. These damping elements elastically fix the actuator housing or housing element 200 to the adapter or carrier element 205 at the pins 500. In the housing, the rubber damper as damping element 215 is provided with degrees of freedom in the X / Y / Z direction in order to prevent twitching that occurs in the adapter. In the Z direction, the rubber damper as damping element 215 is held by a clamping washer as a tensioning element 230. The tensioning element is, for example, pressed in such a way that a defined preload of the damping element 215 is achieved.

[0048] Figure 6 1 shows a schematic diagram of a further embodiment of a parking lock device 125. A housing element 200 and a support element 205 are provided again, wherein an electric motor 600 is now provided on the support element 205 as a switching element 210, which drives the electric motor 600 via a worm 605. Figure 6 The electric motor 600, for example, together with the worm 605 and the gear, can be used to actively release the Figure 1 For example, in order to achieve the best possible acoustic shielding of the outer area of ​​the shift element 210 and the parking lock device 125, a damping element 215 can be provided at the end of the worm 605 that is remote from the electric motor 600, into which the worm 605 extends and which supports the free end of the worm 605 relative to the supporting element 205 and the housing element 200.

[0049] Figure 7 Shows Figure 6, wherein it can now be more easily seen how the damping element 215, through which the end of the worm 605 remote from the electric motor 600 projects, realizes a damping connection between the housing element 200 and the support element 205. For example, if the worm 605 now runs out of circle, the transmission of vibrations to the housing element 200 and / or the support element 205 can be avoided as well as possible by the elastic damping element 215.

[0050] Figure 8 A cross-sectional view of a further exemplary embodiment of a parking lock device 125 proposed here is shown, which is similar to Figure 6 and Figure 7 The embodiment shown in is very similar, wherein the damping element 215 is now not arranged at the end of the worm 605 remote from the electric motor 600, but presses the worm 605 relative to the housing element 200 and / or the support element 205 in the area between the worm 605 and the electric motor 600.

[0051] therefore, Figures 6 to 8 The embodiments described in the foregoing allow for an acoustically decoupled motor mounting and at the same time for absorbing the high axial forces of the worm gear. The lower part of the housing element 200 or the support element 205 can be used as a central receptacle for the motor 600. The motor 600 can also be supported in the housing at the top in the Z direction and in the X direction, for example, via a damping element 215 (e.g. a soft two-component damping element). This results in a damped transmission of structure-borne sound into the housing or a damped transmission from the support element 205 or the motor 600 into the housing element 200.

[0052] In order to ensure that the actuator is acoustically inconspicuous, a bushing is used in this case at the end of the worm 605. The bushing ensures that no knocking noises and thus no transmission of structure-borne sound occur in the event of any non-circular running of the worm 605. At the same time, it also ensures that the worm 605 has sufficient tooth overlap and ensures operation even under load.

[0053] Fig. 9 A schematic cross-sectional view of a portion of a parking lock device 125 is shown. In the present exemplary embodiment, a sturdy, low-tolerance support of a worm wheel 900 with a crank drive is provided. The worm wheel 900 is supported on a pin in the X / Y direction. Compensation in the Z direction is achieved by a spring-loaded bushing, so that the system is supported without play in the Z direction.

[0054] In order to ensure an extended cable traction element stroke, for example, only the radius of the crank drive is changed from 7 mm (14 mm cable traction element stroke) to 13.5 mm (27 mm cable traction element stroke). The remaining system components can remain unchanged.

[0055] Fig.10 Schematic diagram of another embodiment of the parking lock device 125 is shown. Here, the parking lock device 125 is first Fig.10 1000 is shown without housing elements or support elements and only relates to the corresponding electric motor 600 of the drive worm 605 as a switching element. The electric motor 600 is connected to the control circuit 1010 via a connecting line 1000, wherein the connecting line 1000 has a strain relief loop 1020. The strain relief loop 1020 can be used to achieve contact with the electric motor 600, which is designed as a DC motor, for example, in an acoustically decoupled and elastically supported manner to prevent friction corrosion in the contact area. In addition, the system consisting of the electric motor 600, the control circuit 1010 and the connecting line 1000 should be disassembled in a non-destructive manner so that it can be analyzed more easily in the event of damage.

[0056] Fig.11 Shown according to Fig.10 . It can be seen here that the control circuit 1010 is arranged on the support element 205 and the strain relief loop 1020 extends in the free space of the support element 205. In this case, the connecting line 1000 and / or the strain relief loop 1020 can be clamped on the support element 205 and / or the housing element 200 or in them or between these elements, for example, in order to permanently fix the specific positioning of the strain relief loop 1020. It is also conceivable that the support element 205 and the housing element 200 can be acoustically decoupled by the connecting line 1000 or the strain relief loop 1020.

[0057] According to this embodiment, the motor or electric motor 600 is in contact with the circuit board or the drive control circuit 1010 via twisted cables or connecting lines 1000. These twisted cables or connecting lines can absorb the micro-movements that may occur due to the elastic motor support and thus achieve acoustic decoupling without causing movement in the contact area and thus friction corrosion. In order to ensure assembly, the remaining excess length of the cable is accommodated in the housing in the form of a loop 1020. For example, it can be checked whether the assembly is correct via an observation window in the housing. The tension relief of the cable or connecting line 1000 is achieved, for example, by clamping the connecting line in the housing, so that the excess length of the cable can be assembled in the housing and at the same time no damage to the motor 600 occurs due to the movement of the cable 1000.

[0058] exist Figure 1If the vehicle transmission 100 is blocked due to external influences, it should also be ensured that the system of the parking lock device 125 described here is protected and protected from damage. This can also prevent the transmission of usually unpleasant noises to the passenger compartment when a blockage occurs, or solve the problem as automatically as possible.

[0059] In order to realize such a solution, a drive concept for a crank drive with an electric motor 600 is proposed, in which, for example, in a nonlinear drive concept, the torque or force of the actuator or electric motor 600 is determined as a function of the rotation angle φ of the crank drive. It is also possible to apply greater forces and torques at the top dead center and the bottom dead center, wherein the smallest forces are transmitted to the crank drive at 90°. The design of the cable traction element can be designed in such a way that the maximum permissible cable tension does not exceed 700 N.

[0060] Fig.12 A schematic diagram of a method for implementing overload protection in a control circuit 1010 of an embodiment of a parking lock device 125 is shown. In order to implement overload protection, an electrical disconnect device (for example in the form of a control circuit 1010) is required, which, for example, limits the motor current i and thus the force of the actuator or electric motor 600 in dependence on the rotation angle φ. Here, the motor current i is disconnected when a limit value is reached. In a typical actuation process, the current i of the actuator is measured (i_measurement, i.e., i_g), read out and processed in a corresponding signal processing unit 1200. The stored comprehensive characteristic curve 1200 predetermines the maximum current (i_max) in dependence on the rotation angle. Influencing factors such as temperature, transmission variants, component dispersion and wear that varies with operating time can be taken into account in the comprehensive characteristic curve K. For example, the two values ​​are compared within the window range of the comparison unit 1210. As soon as the current i_measurement exceeds the maximum permissible current i_max, the actuation is interrupted or the control signal b is interrupted. A The electric motor is switched off or at least the electric motor 600 is driven to reduce power. The actuator or the electric motor 600 is then stopped or delivers less power. If necessary, various error messages can also be sent to the vehicle. When re-actuating, the error message is cancelled and the entire process for checking the motor current is repeated. A permanent error response is also conceivable, in which the parking lock device does not allow movement even after re-actuation.

[0061] In summary, it can be noted that the solution presented here relates to a parking lock actuator, which has, for example, a cable pull connection. The concept proposed here includes a push-out transmission mechanism, which, for example, implements a shorter stroke for a "P"-"non-P" actuator and a longer stroke for a "PRND" actuator. Acoustic decoupling and accessibility to the vehicle interior are achieved via a cylindrical recess with a diaphragm seal. Assembling, sealing and overall acoustic decoupling are achieved, for example, via an adapter with a corresponding noise element.

[0062] If an exemplary embodiment contains the conjunction “and / or” between a first feature and a second feature, this is to be interpreted as meaning that the exemplary embodiment has both the first feature and the second feature according to one exemplary embodiment and either only the first feature or only the second feature according to another exemplary embodiment.

Claims

1. A parking lock device (125), the parking lock device being used to couple a vehicle transmission (110) having a parking lock (120) and a selector lever (130) coupled to the parking lock (120), the selector lever being movable into a parking lock position for engaging the parking lock (120) and being movable out of the parking lock position for releasing the parking lock (120), wherein: The parking lock device (125) has the following characteristics: a housing element (200) for shielding a switching element (210) from environmental influences, wherein the switching element (210) is designed to switch the parking lock device (125) between a released state and an engaged state of a parking lock (120) of the parking lock device (125); - a carrier element (205) for holding at least one of the switching elements (210); as well as An elastic damping element (215) which is arranged between the housing element (200) and the carrier element (205).

2. The parking lock device (125) according to claim 1, wherein: The damping element (215) is composed of at least two components (220, 225).

3. The parking lock device (125) according to any one of the preceding claims, wherein: The damping element (215) is designed as a fluid-tight seal between the housing element (200) and the carrier element (205).

4. The parking lock device (125) according to any one of the preceding claims, wherein: The damping element (215) is designed in annular shape, in particular wherein a region of the support element (205) or a region of the housing element (200) projects through an opening of the annular damping element (215).

5. The parking lock device (125) according to claim 4, wherein: At least one movable shift element (210) is guided or supported by the damping element (215).

6. The parking lock device (125) according to any one of the preceding claims, comprising a tensioning element (230) for pre-stressing the damping element (215), in particular wherein: The tensioning element (230) is constructed as a wedge-shaped or disk-shaped element introduced between an area of ​​the housing element (200) and an area of ​​the supporting element (205), and / or is constructed as a tensioning ring for pressing a part of the damping element (215) onto the housing element (200) or the supporting element (205).

7. The parking lock device (125) according to any one of the preceding claims, wherein: The damping element (215) has a drain mechanism (300) for draining liquid accumulated or collected on the damping element (215).

8. A parking lock device (125), the parking lock device being used to couple a vehicle transmission (110) having a parking lock (120) and a shift lever (130) coupled to the parking lock (120), the shift lever being movable into a parking lock position for engaging the parking lock (120) and being movable out of the parking lock position for releasing the parking lock (120), wherein: The parking lock device (125) has the following characteristics: - an electric motor (600) designed as an actuator for releasing the parking lock (120); - a driver control circuit (1010) which is used to control the A ) driving the electric motor (600); and - a connection line (1000) for making the control signal (b A ) is transmitted from the drive control circuit (1010) to the electric motor (600), wherein the connecting line (1000) has a tension relief loop (1020), and the connecting line (1000) is not subjected to tensile stress in the tension relief loop.

9. The parking lock device (125) according to claim 8, wherein: The connecting line (1000) is clamped on at least one housing element (200) for shielding a switching element (210) from environmental influences and / or a supporting element (205) for holding at least one of the switching elements (210), wherein the switching element (210) is configured to switch the parking lock device (125) between a released state and an engaged state of a parking lock (120) of the parking lock device (125).

10. The parking lock device (125) according to claim 8 or 9, wherein: The control circuit (1010) is configured to disconnect the electric motor (600) when an overload of the electric motor (600) is detected.

11. A parking lock device (125) having the features of the parking lock device (125) according to any one of claims 1 to 7 and the features of the parking lock device (125) according to any one of claims 8 to 10.

12. A vehicle transmission (110) having a parking lock arrangement (125) according to any one of the preceding claims.

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