Parking locking device with one actuating element

Abstract

The invention relates to a parking locking device (10) comprising a pawl (14) pivotable relative to a housing (62) about a first pivot axis (12), which is pivotable between a locked position (72), in which the pawl (14) engages positively in a rotary component (20), and a release position (30), in which the pawl (14) is decoupled from the rotary component (20) to allow a rotational movement of the rotary component (20) about a rotational axis (22), an actuating device (32) which moves the pawl (14) and transmits a support force between the pawl (14) and the housing (62) in the locked position (72), wherein the actuating device (32) has an actuating element (34) that can be moved by changing an actuating position,that secures the locking pawl (14) in a first actuation position (73) in the locking position (72) by engaging the locking pawl (14) in a first actuation position (73) which can be assumed by a first actuation movement (36) and pivots in the direction of the release position (30) with a second actuation movement (38) opposite to the first actuation movement (36).

Description

[0001] The invention relates to a parking lock device according to the preamble of claim 1.

[0002] DE 10 2018 130 765 A1 describes a parking lock device comprising a locking pawl that is actuated via a carriage and pivotably mounted on a pin about a rotational axis. A spring element is positioned on the carriage via a guide rod, wherein the carriage is operatively connected to the locking pawl and is axially displaceable in the longitudinal direction of the guide rod to actuate the locking pawl.

[0003] The objective of the present invention is to make the parking lock device more reliable, more space-saving, and more cost-effective. The parking position should be more securely entered and maintained.

[0004] At least one of these objects is achieved by a parking lock device having the features of claim 1. As a result, the locking position and the release position can be alternately assumed more quickly and reliably.

[0005] The parking lock device can be arranged in a vehicle. The vehicle can be a motor vehicle, in particular an electric vehicle.

[0006] When in the locked position, the parking lock device can limit or prevent movement of the vehicle from a parked position. For example, movement of a vehicle parked on a slope can be prevented. The parking lock device can be connected to a transmission. The parking lock device can be arranged in or on the transmission.

[0007] The housing may be a gear housing of the transmission.

[0008] The rotating component can be a locking ring or a parking lock gear. The rotating component can be connected to a transmission shaft of the transmission. The rotating component can have locking teeth, particularly arranged on an outer circumference. The locking pawl can engage positively with the locking teeth in the locked position. The locking pawl can have a ratchet tooth that is positively connected to the locking teeth in the locked position.

[0009] An end stop arranged on the housing can limit the pivoting movement of the pawl toward the release position, in particular by engaging an outer periphery of the pawl against the end stop. The end stop can be fixedly or resiliently mounted on the housing.

[0010] The actuating element can pivot the pawl into the locking position by engaging the pawl with the first actuating movement.

[0011] In a preferred embodiment of the invention, it is advantageous if the actuating element is rotatable about a second pivot axis to change the actuating position. The second pivot axis can be arranged parallel or coaxial with the first pivot axis. The actuating element can be rotatable about the second pivot axis through an angle of rotation of less than 360°.

[0012] A preferred embodiment of the invention is advantageous in which the second pivot axis is arranged radially within an outer circumference of the pawl with respect to the rotational axis. The second pivot axis can be arranged circumferentially and / or radially offset from the first pivot axis.

[0013] In an advantageous embodiment of the invention, the locking pawl is preloaded toward the locking position by a spring element. The spring element can be a leg spring arranged on the locking pawl. The spring element can be a coil spring, disc spring, or leaf spring. The spring element can be supported on the locking pawl on the one hand and on the housing or a component firmly connected to it on the other.

[0014] In a specific embodiment of the invention, it is advantageous if the locking pawl has an actuating portion facing away from the first pivot axis in the circumferential direction relative to the rotation axis, on which the actuating element engages to secure and pivot the locking pawl. The actuating portion can be arranged between the first and second pivot axes in the circumferential direction relative to the rotation axis.

[0015] In a preferred embodiment of the invention, it is advantageous if the locking pawl has at least one pawl tooth that positively engages an external toothing of the rotating component in the locking position and is arranged circumferentially with respect to the rotational axis between the actuating section and the first pivot axis. This allows the parking position to be reliably maintained.

[0016] In a preferred embodiment of the invention, the actuating element has a first actuating region that engages the pawl radially outward relative to the rotational axis in the first actuating position. The first actuating region can be hammer-shaped. The first actuating region can engage the actuating portion of the pawl radially outward. The first actuating region can secure the pawl in the locked position.

[0017] In a specific embodiment of the invention, it is advantageous if the actuating element has a second actuating region that engages the pawl radially inward relative to the rotational axis during the second actuating movement. The second actuating region can be designed as a leg on the actuating element. The second actuating region can engage the actuating portion of the pawl radially inward. The second actuating region can secure the pawl in the release position.

[0018] The first and second actuating regions may define a notch into which the actuating portion of the pawl engages in the locked position.

[0019] The second pivot axis can be arranged radially with respect to the rotation axis between the first and second actuating regions. The actuating element can be pivotable in a rocker-like manner.

[0020] In a preferred embodiment of the invention, it is advantageous if the actuating element has a ratchet position in a ratchet position of the pawl lying between the release position and the locked position, in which the pawl can pivot to a limited extent about the first pivot axis and can thereby move to a limited extent relative to the actuating element. As a result, the dynamic movement of the pawl during the ratcheting process, in which the pawl does not alternately engage the external toothing in a positive-locking manner while the rotating component is rotating, but rather slides with the pawl tooth over the external toothing, can be decoupled from the actuating element and the load on the actuating element can be reduced. By selecting a suitable geometry on the end faces of the actuating section and first actuating region, no or only minimal pivoting movements can be caused on the actuating element during the ratchet process.In conventional parking lock devices, the energy introduced into the locking element during the ratcheting process is sometimes so great that the locking element or other components are damaged. In contrast, the actuating element of the parking lock device proposed here remains virtually stationary during the ratcheting process and only engages when the locking wheel is already slowly rotating and most of the energy has been dissipated.

[0021] Note: With other impact locks, the energy introduced into the locking element during ratcheting is sometimes so great that it can damage the locking element or other components. Here, the locking element (= actuating element 34) remains virtually stationary during the ratcheting process and only engages when the ratchet wheel is already slowly rotating and most of the energy has been dissipated.

[0022] In a preferred embodiment of the invention, it is advantageous if the actuating element is mounted on a pivot pin arranged coaxially with the second pivot axis, such that it can rotate relative to the pivot pin to a limited extent, counter to the action of a further spring element. The further spring element can be a leg spring arranged on the actuating element. The further spring element can be a helical spring, disc spring, or leaf spring. The spring element can be supported on the one hand on the pivot pin, for example via a driver pin, and on the other hand on the actuating element. The driver pin can be mounted in the pivot pin. The further spring element can also engage directly in the pivot pin.

[0023] Further advantages and advantageous embodiments of the invention emerge from the description of the figures and the illustrations. Character description

[0024] The invention is described in detail below with reference to the figures. They show in detail: Fig. 1: A spatial view of a parking lock device in a special embodiment of the invention. Fig. 2: A side view of the parking lock device from Fig. 1. Fig. 3: A side view of the parking lock device from Fig. 2 in a ratchet position. Fig. 4: A side view of the parking lock device from Fig. 2 in a locked position. Fig. 5: A side view of a parking lock device in another specific embodiment of the invention.

[0025] Fig. 1 shows a three-dimensional view of a parking lock device in a specific embodiment of the invention. The parking lock device 10 comprises a locking pawl 14 that can pivot relative to a housing about a first pivot axis 12. The locking pawl 14 is pivotally mounted on a bolt 16 that is connected directly or indirectly to the housing, for example via two axially spaced metal sheets, and is preloaded by a spring element 18 toward a locking position in which the locking pawl 14 engages a rotating component 20 in a form-fitting manner. The spring element 18 is supported on the one hand, preferably with one leg, on the housing or a component connected thereto, and on the other hand, preferably with another leg, on the locking pawl 14.

[0026] The rotating component 20 is designed as a ratchet wheel 24 which is rotatable about a rotation axis 22 and has an external toothing 26 into which a pawl tooth 28 of the pawl 14 engages in a form-fitting manner in the locking position and thus blocks a rotational movement of the rotating component 20.

[0027] The locking pawl 14 is pivotable about the first pivot axis 12 between the locking position and a release position 30 shown here, in which the locking pawl 14 is decoupled from the rotary component 20 to release a rotary movement of the rotary component 20 about a rotation axis 22.

[0028] An actuating device 32 moves the locking pawl 14 and, in the locked position, transmits a supporting force of the locking pawl 14 relative to the housing. The actuating device 32 comprises an actuating element 34 that can be moved while changing an actuating position. The actuating element 34 secures the locking pawl 14 in the locked position by engaging the locking pawl 14 in a first actuating position that can be assumed by a first actuating movement 36, and pivots it toward the release position 30 with a second actuating movement 38.

[0029] The actuating element 34 is rotatable about a second pivot axis 40 arranged parallel to the first pivot axis 12 to change the actuating position. The second pivot axis 40 is arranged radially within an outer circumference 42 of the pawl 14 with respect to the rotation axis 22. The actuating element 34 is mounted on a pivot pin 44 arranged coaxially to the second pivot axis 40 via a driver pin 46 so that it can rotate relative to the pivot pin 44 to a limited extent, counter to the action of a further spring element 48. The actuating element 34 is actuated via the pivot pin 44 by a pivot actuator (not shown here) that is mounted coaxially onto a hexagonal area 50 of the pivot pin 44. The interface on the pivot pin 44 that acts relative to the pivot actuator can also be implemented by another force-fitting and / or form-fitting connection, for example a two-flat or Torx head, or even by means of a collet chuck.The pivot pin 44 is rotatably mounted in the housing and supports the supporting force transmitted from the ratchet wheel 24 via the pawl 14 to the actuating element 34 on the housing.

[0030] The pawl 14 has an actuating portion 52 facing away from the first pivot axis 12 in the circumferential direction with respect to the rotation axis 22, on which the actuating element 34 engages to secure and pivot the pawl 14. The pawl tooth 28 is arranged in the circumferential direction with respect to the rotation axis 22 between the actuating portion 52 and the first pivot axis 12.

[0031] The actuating element 34 has a first actuating region 54 which, in the first actuating position, engages the locking pawl 14 radially outward with respect to the rotational axis 22, and a second actuating region 56 which, during the second actuating movement 38, engages the locking pawl 14 radially inward with respect to the rotational axis 22. The first actuating region 54 is hammer-shaped, and the second actuating region 56 is designed as a leg 58 on the actuating element 34. The actuating section 52 and the first actuating region 54 are coordinated with one another in such a way that, under all friction conditions, a moment is required on the pivot actuator for unlocking, i.e., for setting the release position 30. The first and second actuating regions 54, 56 delimit a notch 60 into which the actuating section 52 of the locking pawl 14 engages in the locked position.As a result, in the event of a failure of the swivel actuator, in particular a power failure, i.e. when the swivel actuator can be rotated into any position with a small torque, the pre-tensioned spring element 18 can overcome all other forces acting on the pawl 14 and the pawl tooth 28 can engage in the external toothing 26 of the ratchet wheel 24.

[0032] Fig. 2 shows a side view of the parking lock device from Fig. 1. The pivot actuator causes the pivot pin 44 to rotate counterclockwise, which rotates the actuating element 34 connected to it via the additional spring element 48 in accordance with the second actuating movement 38, whereby the second actuating area 56 engages the actuating section 52 of the pawl 14 and pivots the pawl 14 clockwise about the first pivot axis 12. The second actuating area 56 ensures, on the one hand, that the pawl 14 is lifted far enough out of the ratchet wheel 24 and, on the other hand, that the pawl 14 does not accidentally engage the ratchet wheel 24 in the release position 30 in the event of larger impacts.

[0033] An end stop 64 arranged on the housing 62 limits the pivoting movement of the pawl 14 in the direction of the release position 30 by contact of an outer circumference 42 of the pawl 14 with the end stop 64.

[0034] Fig. 3 shows a side view of the parking lock device from Fig. 2 in a ratchet position. As soon as the pivot actuator and thus the pivot pin 44 rotate clockwise, the actuating element 34, starting from the release position of the pawl 14, will perform the first actuating movement 36 and rotate at least until the first actuating area 54 rests against the tip of the actuating section 52 of the pawl 14. Since the pawl 14 usually cannot immediately engage a gap in the ratchet wheel 24, the actuating element 34 is more strongly preloaded toward the first actuating position by the additional spring element 48 and the further rotation of the pivot pin 44, pressing the first actuating area 54 against the actuating section 52.

[0035] In this ratchet position 66 of the locking pawl 14, which lies between the release position and the locking position, the actuating element 34 has a ratchet position 68 in which the locking pawl 14 can pivot to a limited extent about the first pivot axis 12 and can thereby move to a limited extent relative to the actuating element 34. The actuating portion 52 of the locking pawl 14 slides along an end-face portion 70 of the first actuating region 54. The actuating element 34 can be virtually unaffected by the ratchet movement of the locking pawl 14, whereby the actuating element 34 executes no or only minimal pivoting movements during the ratcheting process.

[0036] Only when the ratchet wheel 24 rotates slowly enough and the pawl 14 can engage deeper into the external toothing 26 of the ratchet wheel 24 does the actuating element 34 continue to execute the first actuating movement 36. A few deflection processes may also occur here, but these are less dynamic.

[0037] Fig. 4 shows a side view of the parking lock device from Fig. 2 in a locking position. In the locking position 72, the pawl tooth 28 engages positively with the external toothing 26 of the ratchet wheel 24. The angle that the actuating element 34 must make to lock the pawl 14 with the ratchet wheel 24, starting from the ratchet position, is relatively small.

[0038] The actuating element 34 secures the locking position 72 through the first actuating position 73 by the first actuating area 54 engaging the actuating section 52.

[0039] Fig.5 shows a side view of a parking lock device in another specific embodiment of the invention. The actuating element 34 is actuated by a linear actuator 74 via a connection area 76 formed on the actuating element 34. The pivot pin 44 is arranged fixedly to the housing, and the additional spring element 48 is effectively received between the pivot pin 44 and the actuating element 34. The additional spring element 48 could also be effectively arranged between the actuating element 34 and the housing 62 or a component connected to the housing 62. List of reference symbols 10 Parking lock device 12 first swivel axis 14 pawl 16 bolts 18 spring element 20 Rotating component 22 axis of rotation 24 ratchet wheel 26 External gearing 28 ratchet tooth 30 Release position 32 Actuating device 34 Actuating element 36 first actuation movement 38 second actuation movement 40 second swivel axis 42 outer circumference 44 pivot pins 46 Driving pin 48 additional spring element 50 hexagon area 52 operating section 54 first operating area 56 second operating area 58 legs 60 incision 62 housings 64 End stop 66 Ratchet position 68 Ratchet position 70 front section 72 Locking position 73 first operating position 74 linear actuator 76 Connection area QUOTES CONTAINED IN THE DESCRIPTION

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

[0000] DE 10 2018 130 765 A1

[0002]

Claims

[1] Parking lock device (10) comprising a locking pawl (14) pivotable relative to a housing (62) about a first pivot axis (12) and pivotable between a locking position (72), in which the locking pawl (14) engages positively in a rotary component (20), and a release position (30), in which the locking pawl (14) is decoupled from the rotary component (20) to release a rotary movement of the rotary component (20) about a rotary axis (22), an actuating device (32) which moves the pawl (14) and, in the locking position (72), transmits a supporting force between the pawl (14) and the housing (62), characterized by , that the actuating device (32) has an actuating element (34) which is movable while changing an actuating position and which secures the locking pawl (14) in the locking position (72) by engaging the locking pawl (14) in a first actuating position (73) which can be assumed by a first actuating movement (36) and pivots it in the direction of the release position (30) with a second actuating movement (38) opposite to the first actuating movement (36). [2] Parking lock device (10) according to claim 1, characterized by that the actuating element (34) is rotatable about a second pivot axis (40) to change the actuating position. [3] Parking lock device (10) according to claim 2, characterized by that the second pivot axis (40) is arranged radially within an outer circumference (42) of the pawl (14) with respect to the rotation axis (22). [4] Parking lock device (10) according to one of the preceding claims, characterized bythat the pawl (14) is pretensioned by a spring element (18) in the direction of the locking position (72). [5] Parking lock device (10) according to one of the preceding claims, characterized by that the pawl (14) has an actuating section (52) facing away from the first pivot axis (12) in the circumferential direction with respect to the axis of rotation (22), on which the actuating element (34) engages for securing and pivoting the pawl (14). [6] Parking lock device (10) according to claim 5, characterized by in that the locking pawl (14) has at least one pawl tooth (28) which, in the locking position (72), positively engages with an external toothing (26) of the rotary component (20) and which is arranged in the circumferential direction with respect to the axis of rotation (22) between the actuating section (52) and the first pivot axis (12). [7] Parking lock device (10) according to one of the preceding claims, characterized bythat the actuating element (34) has a first actuating region (54) which, in the first actuating position (73), acts on the locking pawl (14) radially outwardly with respect to the rotational axis (22). [8] Parking lock device (10) according to one of the preceding claims, characterized by that the actuating element (34) has a second actuating region (56) which acts radially inwardly on the locking pawl (14) with respect to the rotational axis (22) during the second actuating movement (38). [9] Parking lock device (10) according to one of the preceding claims, characterized by in that the actuating element (34) has a ratchet position (68) in a ratchet position (66) of the locking pawl (14) lying between the release position (30) and the locking position (72), in which the locking pawl (14) can be pivoted to a limited extent about the first pivot axis (12) and can thereby be moved to a limited extent relative to the actuating element (34). [10] Parking lock device (10) according to one of the preceding claims, characterized by that the actuating element (34) is mounted on a pivot pin (44) arranged coaxially to the second pivot axis (40) so as to be rotatable to a limited extent relative to the pivot pin (44) against the action of a further spring element (48).

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