Electromechanical park lock actuator
By using a worm gear connection and a shape-fitting blocking device in the electromechanical parking lock actuator, the problem of accidental movement of the parking lock under vibration or shaking conditions is solved, achieving highly reliable parking lock retention.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- FTE AUTOMOTIVE LLC
- Filing Date
- 2021-06-23
- Publication Date
- 2026-06-26
AI Technical Summary
Existing electromechanical parking lock actuators are inadequate in preventing accidental movement of the parking lock, especially in conditions of vibration or shaking, where they cannot reliably maintain the parking lock in the desired position.
An electric motor is used to connect the actuator shaft via a worm gear, and a form-fitting blocking device is set in the release and locking positions. The blocking element engages with the recess of the actuator shaft or its connecting element to ensure that the parking lock can be reliably kept in the desired position even when vibrating or shaking.
It improves the operational reliability of the parking lock actuator, prevents unexpected twisting and accidental movement of the locked position, and ensures the stability of the vehicle under vibration or shaking conditions.
Smart Images
Figure CN113833846B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to an electromechanical parking lock actuator. This type of parking lock actuator is used to actuate a parking lock disposed in a motor vehicle, which is configured to prevent the motor vehicle from unintentionally rolling away when the lock is in the locked position. In particular, this invention relates to an electromechanical parking lock actuator of the type used, for example, in electric motor vehicles or motor vehicles including hybrid transmissions, automated transmissions, or automatic transmissions used in the automotive industry. Background Technology
[0002] Parking locks are particularly needed when the restraining effect of the stationary drive (motor) is insufficient to keep the vehicle in place, or when it is unusable, for example, due to normally open connecting elements. The drivetrain is then typically locked by a parking gear, which is non-rotatably mounted on the output shaft of the transmission and includes teeth. This parking gear can be interlocked onto the teeth by a parking pawl pivotally mounted on a parallel axis. In this case, by the force of a return spring, the parking pawl is preloaded either away from the parking gear to the unlocked position (NP position) or towards the parking gear to the locked position (P position). To overcome the force of the return spring and pivot the parking pawl, in addition to hydraulic parking lock actuators, electric or electromechanical parking lock actuators can be used, which generate a linear or at least substantially linearly extended motion by means of which an actuating element (e.g., in the form of a cam, cone, or carrier with two rollers) can move against the parking pawl to pivot it. To ensure that the parking lock can also engage, and thus prevent the vehicle from rolling away when the parking pawl abuts against the teeth of the parking gear during actuation without interlocking with the teeth, an energy storage device (forward spring) is typically provided on the actuating element, which, when the vehicle is rolling, propels the parking pawl forward via the actuating element, causing the pawl to engage with the teeth of the parking gear.
[0003] Electromechanical parking lock actuators with these functions are known from the prior art. For example, publication DE102017219208A1 discloses a parking lock assembly in which an electric motor pivots an actuator shaft via a gear mechanism to displace an actuation rod by means of a translational motion component eccentrically hinged to the actuator rod, which acts on the locking pawl of the parking lock via an actuation element. A latch plate integrally formed with the pivotable actuator shaft has two recesses therein, in which a latch spring engages as a leaf spring having rollers rotatably mounted thereon to lock the parking lock assembly in a locked state (P position) and an unlocked state (NP position).
[0004] Due to the self-restraining effect of the worm gear, this type of locking is not present in known parking lock actuators with a worm gear positioned between the electric motor and the drive shaft. Therefore, for example, DE10212038A1 describes an electromechanical parking lock actuator comprising an electric motor, the output shaft of which is actively connected via a worm gear to a first connecting portion of a disconnector, which can be switched by an electromagnet, while a second connecting portion is configured to drive an actuating element acting on the locking pawls of the parking lock, particularly via an inserted transmission device, such as an actuating lever. Summary of the Invention
[0005] The problem solved by this invention is to propose the simplest possible design of an electromechanical parking lock actuator of the type mentioned at the beginning, which provides particularly high security against accidental movement of the parking lock.
[0006] In an electromechanical parking lock actuator for use in actuating parking locks in motorized vehicles, the actuator includes an electric motor and an actuator shaft rotatably or pivotally mounted in a carrier structure, particularly formed in an actuator housing, and for directly or indirectly driving an actuating element acting on a locking pawl of the parking lock. The actuator shaft is displaceable between a locked position and a released position. In the locked position, the locking pawl is in the locked position (P position), and in the released position, the locking pawl is in the unlocked position (NP position). The output shaft of the electric motor is actively connected to the actuator shaft via a worm gear. The parking lock actuator according to the invention has a blocking device that, at least in the released position of the actuator shaft, creates a form-fit retention between the carrier structure on one side and the actuator shaft or an element rotatably fixedly connected to the actuator shaft on the other side. The form-fit retention can be configured to be without clearance or with a certain degree of clearance.
[0007] The main advantage of this invention is that, in the released position of the actuator shaft, in addition to the inhibition caused by the worm gear, there is also a form-fit stop. This ensures particularly reliable retention of the actuator shaft in the released position, thereby eliminating the risk of unintended twisting of the actuator shaft and the associated risk of the parking lock undesirably moving to the locked position. In this way, even if the self-inhibition of the worm gear is not sufficiently effective due to possible shaking or vibration, such as when driving the motor vehicle or when the vehicle engine is running, damage to the parking lock or the motor vehicle from uncontrolled actuation can be reliably prevented.
[0008] Therefore, the parking lock actuator according to the present invention is characterized by particularly high operational reliability. Furthermore, it is economical to manufacture, easy to install, and simple in design. In addition, its compact design makes it easy to accommodate, even in limited spaces.
[0009] A particular advantage is that, at least in the locked position of the actuator shaft, the blocking device creates a form-fit retention between the carrier structure on one side and the actuator shaft on the other side, or an element rotatably fixed to the actuator shaft. Again, this form-fit retention can be configured to be without clearance or with a certain degree of clearance. This reliably prevents unwanted movement of the parking lock towards the unlocked position.
[0010] According to a particularly preferred embodiment of the invention, the actuator shaft or an element rotatably fixedly connected to the actuator shaft has one recess, or in some cases two recesses, wherein form-fit retention is achieved by a blocking element belonging to a blocking device engaging at least partially in the first recess in the release position of the actuator shaft and, in some cases, also at least partially in the blocking position of the actuator shaft in the other recess. The blocking device is here fixedly connected to the carrier structure. Alternatively, a reverse arrangement is possible, wherein the blocking element of the blocking device is arranged on the actuator shaft or on an element connected to the actuator shaft, and form-fit retention is achieved by the blocking element engaging in a corresponding recess formed on or connected to the carrier structure.
[0011] It is particularly advantageous here that at least one recess is formed on the periphery of the actuator shaft or an element rotatably fixed to the actuator shaft, and the blocking element engages in at least one recess at least generally in the radial direction in order to achieve form fit retention.
[0012] Furthermore, it is advantageous that at least one recess is formed in the circumferential direction of the actuator shaft or the element rotatably fixed to the actuator shaft, extending over a range longer than the width of the blocking element in the circumferential direction. This achieves a clearance-dependent engagement that is insensitive to tolerances during installation and operation.
[0013] According to another preferred embodiment of the invention, in order to achieve shape fit retention, at least in the released position of the actuator shaft, and in some cases also in the locked position of the actuator shaft, the blocking element is held in the corresponding recess by force fit.
[0014] To this end, it is proposed that the blocking element be advantageously mounted so as to be axially displaceable in the guide element of the blocking device, and loaded by a spring, in particular a helical compression spring, in the direction of the actuator shaft or an element that is rotatably fixed to the actuator shaft, so that it forms an elastic pressure element and achieves form-fitting latch retention.
[0015] Furthermore, it is advantageous that the parking lock actuator includes a housing, in some cases a multi-piece housing, which at least contains an electric motor, a worm gear, and a carrier structure, in which a portion of the actuator shaft is mounted. The housing has internal cutouts or openings through its walls into which a guide element is inserted. The carrier structure for the actuator shaft can be configured entirely or partially as a separate device inserted into the housing, or it can be formed by specific shaped elements within the housing and thus integrally formed with it.
[0016] Furthermore, it is particularly advantageous that if the guide element of the blocking device is inserted into the opening from the outside through the wall of the housing, the spring used to load the blocking element is preloaded and compressed. This makes the installation of the parking lock actuator particularly simple.
[0017] Preferably, the guide element can be welded into the opening of the housing. Alternatively, it can be provided with an external thread and screwed into the opening of the housing.
[0018] Particularly advantageously, the blocking element and / or at least one recess has a chamfered and / or rounded profile in the circumferential direction of the actuator shaft or a rotating element rotatably connected to the actuator shaft. Thus, the torsion of the actuator shaft driven by the electric motor, through the sliding of the chamfered or rounded profiles against each other under further tension of the spring, easily presses the blocking element, mounted as an elastic pressure member, out of the corresponding recess, thereby easily achieving the desired movement of the parking lock. The preload of the spring is set such that the chamfered or rounded profiles therefore cannot slide against each other without the application of driving force by the electric motor, thereby achieving the desired form-fit blocking of the actuator shaft in the released position and, in some cases, in the locked position.
[0019] According to another particularly preferred embodiment of the invention, the parking lock actuator includes a coupling device that operates by form-fit and / or force-fit, having two rotatably or pivotally mounted coupling portions, wherein the first coupling portion is actively connected to the output shaft of an electric motor via a worm gear, and the second coupling portion is mounted, in particular, via a linear ball bearing, thereby being axially displaceable relative to the first coupling portion and rotatably fixedly connected to the actuator shaft. It is proposed here that at least one recess is formed in the second coupling portion, which is rotatably fixedly connected to the actuator shaft.
[0020] Particularly advantageous here is that at least one recess forms an opening in the axial direction relative to the actuator shaft without edge boundaries, such that when the coupling is opened, the blocking element can disengage from at least one recess by axial displacement of the second connecting portion. This opening of the coupling caused by the auxiliary actuator isolates the electric motor and worm gear from the actuator shaft, thus advantageously allowing emergency operation of the parking lock in the event of actuator failure, which can be performed, for example, manually or by an additional spring device of the parking lock actuator that loads or preloads the actuator shaft in the desired rotational direction. In such an emergency, the form-fitting obstruction of the actuator shaft according to the invention is also eliminated by opening the coupling.
[0021] Based on the torsion angle of the actuator shaft during emergency operation, the second recess is advantageously positioned on the second connecting portion such that when the connector is subsequently closed, the blocking element can engage with the second recess as the second connecting portion is axially displaced in the direction toward the first connecting portion. Attached Figure Description
[0022] Other advantages and features of the present invention can be found in the following description of the exemplary embodiments shown in the accompanying drawings. The drawings show:
[0023] Figure 1 A schematic diagram of a parking lock, including an electromechanical parking lock actuator;
[0024] Figure 2 A perspective view of the electromechanical parking lock actuator according to the present invention;
[0025] Figure 3 : Figure 2 The parking lock actuator, in which the housing has been partially removed;
[0026] Figure 4 : Figure 2 Bottom view of the parking lock actuator;
[0027] Figure 5 :along Figure 4 The sectional view of section line AA;
[0028] Figure 6 :along Figure 4 The sectional view of section line BB;
[0029] Figure 7 :along Figure 5 A sectional view of section line CC;
[0030] Figure 8 From Figure 5 A magnified view of the details X, and
[0031] Figure 9: A schematic diagram of the blocking device according to the present invention.
[0032] For simplicity, the same elements are represented by the same reference numerals in the accompanying drawings, even when used in different embodiments. Detailed Implementation
[0033] Figure 1 An electromechanical parking lock actuator 10 is shown, configured to actuate a parking lock 12 disposed in a motor vehicle. The parking lock 12 includes a parking gear 14, which is rotatably and axially fixed on a drive shaft (not shown) of the motor vehicle's transmission and has teeth 16 on its outer peripheral side. For form-fit locking of the motor vehicle's transmission system, the parking lock 12 also includes a locking pawl 18, hinged to the transmission housing (not shown here) and pivotable about a pivot axis 20, and including locking teeth 22 that engage with the teeth 16 of the parking gear 14 by form fit when the locking pawl 18 pivots about the pivot axis 20. A return spring (not shown here) acts on the locking pawl 18, which is supported or suspended relative to the transmission housing and preloads the locking pawl 18 away from the parking gear 14 into the unlocked position.
[0034] To enable the locking pawl 18 to pivot about the pivot axis 20, an actuating element 26 is provided. In the exemplary embodiment shown, this actuating element 26 includes two rollers 28 and can be selectively axially displaced along the locking direction S or the unlocking direction E by means of the parking lock actuator 10, such as... Figure 1 and Figure 2 As indicated by the arrows in the diagram. Two rollers 28 are guided in a guide element 30 fixed relative to the transmission housing, such that during axial movement of the actuating element 26 in the locking direction S, one roller 28 runs on the inclined contact surface 24 of the locking pawl 18, while the other roller 28 is supported on the guide element 30. As a result, the locking pawl 18 pivots, thereby overcoming the return spring (…). Figure 1 A force (not shown) rotates clockwise about the pivot axis 20 so that the locking tooth 22 engages with the tooth 16 of the parking gear 14 in a form-fitting manner. In contrast, during the axial movement of the actuating element 26 in the unlocking direction E, the roller 28 rises from the contact surface 24, resulting in the locking pawl 18 pivoting to... Figure 1 Under the force of the return spring, it rotates counterclockwise around the pivot axis 20, wherein the locking tooth 22 is removed from the tooth 16, thereby disengaging from the parking gear 14.
[0035] exist Figure 2In the exemplary embodiment shown, the parking lock actuator 10 according to the invention includes an actuator housing 32, preferably injection molded from a plastic material, and having a fastening hole 33 molded thereon, which is known in motor vehicles for fastening the parking lock actuator 10 to a drive wall (not shown) for example by means of screws. A separately formed housing portion 34 is attached to the actuator housing 32 via a bayonet connection and houses an electric motor 36 therein. Thus, the actuator housing 32 is constructed here together with the associated motor housing as a plurality of parts. The electric motor 36 is used to rotatably drive the actuator shaft 42 via a gear mechanism 38 and a coupling device 40, the actuator shaft converting the rotational motion into at least approximately axial motion of an actuating rod 46 via an eccentric device, the actuating rod 46 carrying an actuating element 26 for the parking lock 12. During normal operation of the parking lock actuator 10, the actuating lever 46 can be driven by the electric motor 36 in the locking direction S, or conversely, in the unlocking direction E. In this case, a forward spring 38 in the form of a helical compression spring surrounding the actuating lever 46 preloads the actuating lever 46 and / or the actuating element 26 relative to the guide sleeve 50 of the eccentric device 44 toward the locked position. Both the parking lock 12 and the parking lock actuator 10 according to the invention can be arranged within the transmission housing (not shown here) of a motor vehicle.
[0036] The interior of the parking lock actuator 10 according to the invention will now be described in more detail. The actuator shaft 42 has an enlarged shoulder 57 at its front end facing the actuating lever 46, which forms the crank arm of the eccentric device 44. The shoulder 52 is mounted here by a front bearing 54, which is in the form of a ball bearing housed in a bearing housing 56. The bearing housing 56 is attached to the front housing opening of the actuator housing 32 via a bayonet connection 58 and closes the opening at the front. In its rear end region, the actuator shaft 42 is mounted by a rear bearing 60, which is housed in an internal protrusion 62 of a housing cover 64, which closes the actuator housing 32 at the rear. The housing cover 64 is fluid-tightly connected to the actuator housing 32 by a form-fitting element 66 and / or by welding to an inserted sealing device.
[0037] The gear mechanism 38 includes a worm gear, wherein a worm 70 fixed to the output shaft 68 of the electric motor 36 drives the circumferential teeth 72 of the gear 74. The gear 74 is mounted on the actuator shaft 42, thereby being rotatable relative to the actuator shaft 42 and axially fixed in place relative to the actuator housing 32.
[0038] On its side facing the housing cover 64, a gear 74 with a disc-shaped annular region forms a first connecting portion 80, which cooperates with a second connecting portion 82 of a connecting device 40 arranged adjacent to it. The connecting device 40 is configured here as a shape-fitting, switchable disconnecting connector in the form of a claw-shaped connector. For this purpose, the second connecting portion 82 includes a tubular sleeve portion 88 integrally formed with a disc-shaped flange portion 86 and arranged on the actuator shaft 42 via a linear ball bearing 90, thereby allowing axial displacement and rotational fixation. At their opposing end faces, both the annular region of the first connecting portion 80 and the flange portion 86 of the second connecting portion 82 have multiple claws (not shown in the figure). Figure 5 As shown, when the second connecting portion 82 axially abuts against the first connecting portion 80, the connecting device 40 is closed. Then, the claws of the two connecting portions 80 and 82 engage with each other, allowing torque to be transmitted between the two connecting portions 80 and 82 in both rotational directions. However, when the second connecting portion 82 is removed from the first connecting portion 80 by axial displacement on the actuator shaft 42, the claws of the two connecting portions 80 and 82 disengage, causing the connecting device 40 to open, and torque can no longer be transmitted between the two connecting portions 80 and 82, or the two connecting portions 80 and 82 can rotate freely relative to each other. Specifically, when the connecting device 40 is open, the actuator shaft 42, which is rotatably fixed to the second connecting portion 82, and thus the actuator element 26 connected thereto via the eccentric device 44 and the actuator rod 46, can be moved independently of the first connecting portion 80 and the electric motor 36 actively connected thereto by the worm gear.
[0039] Here, the spring element 92, formed by a helical compression spring, is arranged on the connecting device 40, and... Figure 5The preloaded coupling device 40 is shown in the closed state. For this purpose, a helical compression spring 92, coaxially surrounding the actuator shaft 42, rests on a step formed on the outer side of the sleeve portion 88 via an annular plate on one side and on a disc 94 fixed to the front of the rear bearing 60 on the other side. The coupling device 40 can be opened by a switching device 96 overcoming the preload force of the spring element 92, which can be electrically activated here. This switching device 96 is formed here by an annular electromagnet 98, i.e., by an electromagnetic actuator. For this purpose, in a known manner, a coil 100 is wound on a coil carrier, which is in turn housed in a magnet housing 104. The annular magnet housing 104, coaxially surrounding the actuator shaft 42, is housed in the actuator housing 32 and is centered in the region of the outer ring of the axially forward-projecting rear bearing 60, and is axially defined between the step formed on the inner side of the actuator housing 32 and the protrusion 62 of the housing cover 64. Here, the axially displaceable second connecting portion 82 is designed with at least one component made of iron, forming an iron core. When the coil 100 of the electromagnet 98 is energized, this iron core acts as a solenoid plunger, overcoming the preload force of the spring element 92, and is pulled into the coil 100 until the free end of the sleeve portion 88 is supported on the disc 94 forming an axial stop. At this end position, the disc-shaped flange portion 86 of the second connecting portion 82 (whose outer periphery can be inserted into the annular magnet housing 104 without contact) still has a certain axial distance from the coil 100 and the coil carrier. Therefore, there is no contact here when the coil 100 is energized, and thus no magnetic holding force occurs. This force will hinder or prevent the twisting of the second connecting portion 82 and the actuator shaft 42, which is rotatably fixed thereto.
[0040] To form a second actuator that can rotate the actuator shaft 42 independently of the electric motor 36 in an emergency when the coupling device 40 is open in the event of a failure of the first actuator formed by the electric motor 36, a spring device 110, formed of a helical spring, is provided in the actuator housing 32. The helical spring 110 is located in the front region near the shoulder 52 and is internally attached to the actuator shaft 42. After several turns of the helix around the actuator shaft 42, the outer end region of the spring device 110 is fixed to the portion of the actuator housing 32 adjacent to the bearing cover 56. In this way, the helical spring 110 loads the actuator shaft 42 in the rotational direction, which, when the coupling device 40 is open, moves the actuating element 26 in the locking direction S via the actuating rod 46, causing the locking pawl 18 to pivot to the locked position due to the energy stored in the spring device 110, thus activating the parking lock 12 and blocking the vehicle. The locking pawl 18 reaches its locked position before the eccentric device 44 passes its top dead center facing the locking pawl 18, thus the locking pawl 18 is reliably held in the locked position due to the energy stored in the spring device 110 and still acting on the actuator shaft 42. When the fault has been eliminated, the parking lock 12 can be released again by the electric motor 36 during normal operation, thereby simultaneously preloading the coil spring 110 back to its previous state.
[0041] Therefore, even during possible vehicle vibrations or shaking, the parking lock can be firmly held in the position desired by the driver. According to the invention, a blocking device 112 is provided in the parking lock actuator 10, which can block the actuator shaft 42 by the form-fitting of the release position and the locked position. This reliably avoids accidental twisting of the actuator shaft 42 and undesirable movement of the parking lock.
[0042] The blocking device 112 includes a blocking element 114, which is mounted by a bolt-like shaft, allowing axial displacement within the guide element 116. A spring 122 (configured herein as a helical compression spring) is arranged between a radially outwardly projecting collar 118 of the blocking element 114 and the base 120 of the guide element 116, and... Figure 5 , 8 The blocking element 114 is preloaded in the blocking state shown in Figure 9. The guide element 116 is inserted into the opening 124 of the actuator housing 32, which internally forms a carrier structure 126 for the actuator shaft 42 and is attached therein by welding.
[0043] In this blocking state, the free end portion 128 of the blocking element 114 engages in the first recess 130 under spring load. This first recess 130 is located on the periphery of the flange portion 86 of the second connecting portion 82, which is rotatably fixedly connected to the actuator shaft 42d. The actuator shaft 42 is in the released position here, corresponding to the unlocked position of the locking pawl 18. The second recess 132 is arranged opposite to the first recess 130 on the periphery of the flange portion 86 of the second connecting portion 82, and after the actuator shaft 42 is correspondingly twisted to the locked position corresponding to the locked position of the locking pawl 18, the free end portion 128 of the blocking element 114 can also engage in the second recess under spring load. This position also corresponds to the blocking state of the blocking device 112. Therefore, in the released and locked positions of the actuator shaft 42, a form-fit retention is achieved between the blocking device 112, which is fixedly connected to the carrier structure 126 or housing 132 on one side, and the second connecting portion 82, which is rotatably fixedly connected to the actuator shaft 42 on the other side.
[0044] The two recesses 130 and 132 are each wider in the circumferential direction than the width of the end portion 128 of the blocking element 114 when viewed in the circumferential direction. In this way, a shape fit retention with gap is achieved in both blocking states of the blocking device 112. Here, the circumferential edges of the two recesses 130 and 132 are chamfered, while the contour of the end portion 128 of the blocking element 114 in the circumferential direction is rounded.
[0045] When the actuator shaft 42 is twisted by the electric motor 36, the chamfered profiles of the recesses 130 and 132 and the circular profile of the end portion 128 of the blocking element 114 allow the blocking element 114 to overcome the preload force of the spring 122 and be pressed into the guide element 116. This preload force of the spring 122 cannot be overcome without the driving torque applied by the electric motor 36, thus reliably ensuring that the actuator shaft 42 maintains the desired form fit in the release and locked positions.
Claims
1. An electromechanical parking lock actuator (10) for actuating a parking lock (12) in a motor vehicle, comprising: - An electric motor (36) with an output shaft (68), - An actuator shaft (42), which is rotatably or pivotally mounted in the carrier structure (126), and is used to directly or indirectly drive the actuator element (26) acting on the locking pawl (18) of the parking lock (12). The actuator shaft (42) can shift between a locked position corresponding to the locking position of the locking pawl (18) and a released position corresponding to the unlocking position of the locking pawl (18), and The output shaft (68) of the electric motor (36) is actively connected to the actuator shaft (42) via a worm gear (70). Its features are, The parking lock actuator (10) has a blocking device (112) disposed in an opening (124) in an actuator housing (32) having a carrier structure (126) for an actuator shaft (42) formed therein. The blocking device (112) provides a form fit with or without clearance between the carrier structure (126) on one side and the actuator shaft (42) on the other side or an element rotatably fixed to the actuator shaft (42).
2. The parking lock actuator (10) according to claim 1, characterized in that, Even in the locked position of the actuator shaft (42), the blocking device (112) maintains a gapless or gapped shape fit between the carrier structure (126) on one side and the actuator shaft (42) on the other side or the element rotatably fixed to the actuator shaft (42).
3. The parking lock actuator (10) according to claim 1 or 2, characterized in that, The actuator shaft (42) or an element rotatably fixed to the actuator shaft (42) has at least one recess (130, 132), and a blocking element (114) connected to the carrier structure (126) is at least partially engaged in the recess to achieve shape fit retention.
4. The parking lock actuator (10) according to claim 3, characterized in that, The at least one recess (130, 132) is formed on the periphery of the actuator shaft (42) or an element rotatably fixed to the actuator shaft (42), and the blocking element (114) engages in the at least one recess (130, 132) in the radial direction.
5. The parking lock actuator (10) according to claim 4, characterized in that, In the circumferential direction of the actuator shaft (42) or an element rotatably fixed to the actuator shaft (42), the at least one recess (130, 132) is formed to be longer than the width of the blocking element (114).
6. The parking lock actuator (10) according to claim 3, characterized in that, In order to achieve the shape fit retention, the blocking element (114) is held in the at least one recess (130, 132) by force fit.
7. The parking lock actuator (10) according to claim 6, characterized in that, The blocking element (114) is guided to be axially displaced in the guide element (116) of the blocking device (112) and is loaded by a spring (122) in the direction of the actuator shaft (42) or an element rotatably fixed to the actuator shaft (42).
8. The parking lock actuator (10) according to claim 7, characterized in that, The actuator housing (32) includes at least the electric motor (36), the worm gear (70) and the carrier structure (126), a portion of the actuator shaft (42) is mounted in the carrier structure (126), wherein the guide element (116) is inserted into the opening (124) of the actuator housing (32).
9. The parking lock actuator (10) according to claim 8, characterized in that, The guide element is inserted from the outside into the opening (124) of the actuator housing (32) and a preload is applied to the spring (122) that loads the blocking element (114).
10. The parking lock actuator (10) according to claim 8 or 9, characterized in that, The guide element (116) is screwed into the opening (124) of the actuator housing (32) or welded therein.
11. The parking lock actuator (10) according to claim 3, characterized in that, The blocking element (114) and / or the at least one recess (130, 132) have a chamfered and / or rounded profile in the circumferential direction of the actuator shaft (42) or an element rotatably fixed to the actuator shaft (42).
12. The parking lock actuator (10) according to claim 3, characterized in that, It includes a coupling device (40) that functions by form fit and / or force fit, the coupling device having two rotatably or pivotally mounted first coupling portion (80) and second coupling portion (82), wherein the first coupling portion (80) is actively connected to the output shaft (68) of the electric motor (36) via the worm gear, and the second coupling portion (82) is mounted to be axially displaced relative to the first coupling portion (80) and rotatably fixedly connected to the actuator shaft (42), wherein at least one recess (130, 132) is formed in the second coupling portion (82).
13. The parking lock actuator (10) according to claim 12, characterized in that, The at least one recess (130, 132) forms an opening in the axial direction relative to the actuator shaft (42), such that the blocking element (114) can disengage from the at least one recess (130, 132) by axial displacement of the second connecting portion.
14. The parking lock actuator (10) according to claim 7, characterized in that, The spring (122) is a helical compression spring.