Parking lock arrangement

Abstract

The invention relates to a parking lock arrangement (15), comprising: a drive (16); a first drive element (24) pivotable by the drive device (16) about a stationary axis of rotation (29); and a second drive element (27), which is operatively connected to the first drive element (24) by means of a spring unit (28), can be connected to the first drive element (24) in a rotationally fixed manner by means of a locking device (30), and can be pivoted together with the first drive element (24) about a rotational axis (29) of the first drive element (24). The actuating element (31) can be brought into or out of engagement with a locking element (18) as a function of a pivoting movement of the second drive element (27), by means of which a rotational movement of the shaft (7) can be locked and released. When the locking device (30) is deactivated, the second drive element (27) can be pivoted about a further axis of rotation (45) relative to the first drive element (24) by means of the spring unit (28). The further axis of rotation (45) is fixedly arranged on the first drive element (24) and is spaced apart from the axis of rotation (29) of the first drive element (24).

Description

Technical Field

[0001] The invention relates to a parking lock arrangement according to the manner further defined in the preamble of claim 1 . Background Art

[0002] A parking lock system for a motor vehicle is known from DE 10 2019 001 189 A1. The parking lock system comprises a housing and a drive shaft, which can be connected to a wheel of a motor vehicle. In addition, a locking element is provided, by which the drive shaft can be connected to the housing in a rotationally fixed manner. In addition, the parking lock system comprises an operating element, which is configured to operate the locking element. A first adjusting disk and a second adjusting disk are arranged around a common rotation axis. The first adjusting disk can be rotationally adjusted by an adjusting device. A first actuator is connected to the operating element and the second adjusting disk.

[0003] Furthermore, the adjusting device, the first adjusting disk, the second adjusting disk, the first actuator, the operating element and the locking element are arranged in such a way that the operating force can be transmitted from the adjusting device to the first adjusting disk. The operating force is transmitted from the first adjusting disk to the second adjusting disk, from there further to the first actuator, from there further to the operating element and from there further to the locking element. Furthermore, at least one spring device is provided, which has a first end and a second end. The first end is at least indirectly supported relative to the first adjusting disk, while the second end is at least indirectly supported relative to the second adjusting disk.

[0004] In addition, the parking lock system comprises a second actuator which is not pivotable relative to the first actuator and is movable in a longitudinal direction arranged perpendicularly to the common rotation axis. The second actuator is directly coupled to the first actuator by means of a spring device.

[0005] The disadvantage of this parking lock system is that the structure is complex and a large adjustment force is required to engage the parking lock device during emergency operation. This is because during the engagement process during emergency operation, the two actuators move relative to each other along the common contact area. In this process, friction occurs in the contact area. The friction force generated thereby must also be overcome by the spring device. Summary of the invention

[0006] The object of the present invention is to provide a parking lock arrangement of a simple design, in particular a parking lock arrangement of a drive train of a vehicle, which can be actuated with low actuating forces, in particular also during emergency operation.

[0007] This object is achieved according to the invention by a parking lock arrangement having the features of claim 1 .

[0008] The parking lock arrangement according to the invention comprises a drive device and a first drive element, which can be pivoted by the drive device about a fixed rotation axis. In addition, a second drive element is provided, which is in operative connection with the first drive element via a spring unit. In addition, the second drive element can be connected to the first drive element in a rotationally fixed manner via a locking device and can be pivoted together with the first drive element about the rotation axis of the first drive element.

[0009] As a function of the pivoting movement of the second drive element, the actuating element can be brought into engagement with or out of engagement with a locking element, by means of which a rotational movement of the shaft can be blocked and released.

[0010] According to the invention, when the blocking device is deactivated, the second drive element can be pivoted relative to the first drive element about a further rotation axis by the spring unit. The further rotation axis is fixedly arranged on the first drive element and is spaced apart from the rotation axis of the first drive element.

[0011] The second drive element is preferably permanently rotatably supported on the first drive element. The second drive element can be brought into operative connection with the first drive element in the region of the axis of rotation by means of a locking device, so that a rotational movement of the second drive element relative to the first drive element about the further axis of rotation is blocked by the locking device. The second drive element and the first drive element can then be pivoted together about the axis of rotation by the drive device.

[0012] This makes it possible to operate the parking lock arrangement, whose spring unit produces the operative connection between the first drive element and the second drive element, in a particularly energy-saving manner during normal operation of the parking lock arrangement without changing the preload of the spring unit.

[0013] Thus, during normal operation, during which the two drive elements are connected in a rotationally fixed manner by the latching device, the parking lock arrangement can be actuated by the drive device. That is, the drive device can switch the parking lock arrangement from an engaged state (P_ein) in which the shaft is held in a rotationally fixed manner by the parking lock arrangement to an unengaged state (P_aus) in which the rotational movement of the shaft is released on the parking lock device side. Furthermore, during normal operation, the parking lock arrangement can be switched from the unengaged operating state to the engaged operating state on the part of the drive device with a small actuating force. This is accordingly the case because, due to the rotationally fixed coupling of the drive elements, no relative movement and the frictional forces thus generated can occur in the region between the drive elements.

[0014] Furthermore, the parking lock arrangement can also be operated with a lower actuating force during emergency operation (during which the parking lock arrangement cannot be actuated by the drive device). This is because during emergency operation (the rotationally fixed connection between the first drive element and the second drive element is released by the deactivation locking device), the second drive element performs a relative movement relative to the first drive element about the other rotation axis due to the spring force exerted by the spring unit, and the parking lock arrangement is either engaged or disengaged depending on the respective application situation. Since the other drive element can be designed to be supported only about the other rotation axis and to bear against the first drive element, the friction forces generated between the drive elements during emergency operation are much lower than in known parking lock arrangements.

[0015] In another embodiment of the parking lock arrangement according to the invention which is simple to implement and characterized by a high power density, the drive device comprises an electric motor. The drive shaft of the electric motor is connected in a rotationally fixed manner to a gear which is in meshing engagement with the toothing of the first drive element. It can be provided that the toothing is implemented as a tooth profile which extends over a defined angular range and forms tooth segments.

[0016] If the tooth engagement between the gear wheel and the toothing of the first drive element is designed to be self-locking, an additional latching device (with which the parking lock arrangement is held in the engaged state or in the disengaged state, respectively) can be advantageously omitted.

[0017] For this purpose, it is possible, for example, to implement a tooth engagement between the gear wheel and the toothing in the manner of a self-locking worm gear or the like.

[0018] In a structurally simple, space-saving and lightweight embodiment, the parking lock arrangement according to the invention comprises an actuating element which is designed in the form of a disk or lever.

[0019] Furthermore, in a spatially advantageous embodiment of the parking lock arrangement according to the invention, the rotational axis of the first drive element and the further rotational axis are arranged so as to extend parallel to one another.

[0020] In a space-saving and structurally simple improvement of the parking lock device according to the invention, the spring unit is implemented as a torsion spring. The torsion spring can be arranged between the two drive elements in an effective manner around another rotation axis and supported on the first drive element at one end and on the second drive element at the other end. In addition, the spring unit can be preloaded between the drive elements so that the spring unit applies a spring force to the second drive element. The spring force can act on the second drive element in the direction of the positioning of the second drive element when the locking element locks or releases the rotational movement of the shaft. Through this embodiment of the parking lock device according to the invention, it is ensured that the spring unit switches the second drive element to a preferred swiveling position in which the parking lock device is either in a hung-in operating state or in a hung-out operating state without additional control and regulation costs.

[0021] The locking device can have a lifting magnet, by means of which the locking element can be guided against the spring force to disengage the second drive element. In this case, there is the possibility that the locking element can be moved longitudinally along the axis of rotation. This provides the possibility of releasing the operative connection between the two drive elements in the region of the axis of rotation of the first drive element by applying a brief electrical pulse by the lifting magnet and releasing the relative rotational movement of the second drive element relative to the first drive element. In addition, the locking element acting on the spring ensures that the locking device is automatically activated as soon as the two drive elements are in the pivoting position required for this purpose.

[0022] In an improved version of the parking lock device according to the invention, which operates with lower control and regulation costs, the swivel angle range of the first drive element is limited by stops not only in the direction of the position of the first drive element when the locking element locking shaft rotates, but also in the direction of the position of the first drive element when the locking element release shaft rotates.

[0023] This also applies to other embodiments of the parking lock device according to the invention, in which the swivel angle range of the second drive element is limited by stops not only in the direction of the position of the second drive element when the locking element locking shaft is rotated, but also in the direction of the position of the second drive element when the locking element release shaft is rotated.

[0024] In a particularly simple to operate embodiment of the parking lock arrangement according to the invention, a stop which limits the swivel angle range of the second drive element in the direction of the position which the second drive element assumes when the locking element releases the shaft in a rotational movement is arranged in the area of ​​the first drive element.

[0025] In a preferred embodiment of the parking lock device according to the invention, the second drive element can be transferred from its pivoted swivel position relative to the first drive element to a swivel position in which the two drive elements are connected to each other by a locking element without additional control and adjustment costs by the first drive element with the aid of a stop in the area of ​​the first drive element.

[0026] The other spring unit acts on the locking element in the direction of the position of the locking element when the locking element releases the rotational movement of the shaft.In addition, it can be provided that the other spring unit is supported on the locking element at one end and on the second drive element at the other end.

[0027] If the additional spring unit assigned to the locking element acts on the second drive element and the locking element so that the spring characteristic curve of the additional spring unit has a decreasing trend, the parking lock arrangement can be operated with the least possible energy consumption. The advantage is that the decreasing trend makes it possible to transfer the locking element to the position of the rotational movement of the locking shaft of the locking element with the least possible adjustment force.

[0028] A parking lock arrangement is to be understood in particular as a system which is provided for locking a motor vehicle drive train in an engaged state, in particular in the area of ​​a transmission, so that at least one output shaft of the transmission is immobilized and the motor vehicle is prevented from rolling away accidentally when parked. The engaged state of the parking lock arrangement corresponds in particular to the so-called Pein state. In the disengaged state, the parking lock arrangement is provided for releasing the output shaft.

[0029] The hanging out state of the parking lock device corresponds in particular to the so-called P_aus state. For this purpose, the parking lock device preferably has a parking lock wheel. Here, the parking lock wheel should be understood in particular as a gear having a toothed portion at its periphery, which is arranged to be connected with a locking element (especially a locking pawl) fixed at least partially relative to the housing. Preferably, the locking element is arranged to be used to fix the parking lock wheel relative to the housing in the hanging state of the parking lock device. Here, the locking pawl should be understood in particular as an element that can be pivoted between two operating positions, which forms at least one locking tooth, which is configured to correspond to the toothed portion of the parking lock wheel and is arranged to be engaged in the toothed portion of the parking lock wheel in a form-locking manner for hanging the parking lock device.

[0030] The invention is not limited to the described combination of features of the independent claims or dependent claims. Furthermore, it is also possible to combine individual features from the claims, the following description of preferred embodiments of the invention or directly from the drawings with one another. The fact that a claim refers to a drawing by using a reference numeral shall not limit the scope of protection of the claim. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Preferred improvements are obtained from the dependent claims and the following description. Embodiments of the present invention are further described in conjunction with the drawings, but the present invention is not limited thereto.

[0032] In the figure:

[0033] Figure 1 Simplified illustration of an electrically drivable axle of a vehicle with a parking lock facility;

[0034] Figure 2 A simplified three-dimensional diagram shows the Figure 1 a parking lock device of an axle of the vehicle, which is in an engaged operating state of the parking lock device;

[0035] Figure 3 Show according to Figure 2 further specified in perspective III, according to Figure 2 A partial side view of the parking lock facility;

[0036] Figure 4 Shows the corresponding parking lock device Figure 3 , which is in the deployed operating state of the parking lock facility;

[0037] Figure 5 Shown along Figure 4 a partial cross-section of the parking lock arrangement along the section line VV as further specified in;

[0038] Figure 6 Shows the corresponding parking lock device Figure 3 , which is in the engaged state and the operating state of the emergency release;

[0039] Figure 7 Shows the corresponding parking lock device Figure 5 , which is in Figure 6 The operating status shown;

[0040] Figure 8 A highly simplified illustration showing the kinematics of a parking lock arrangement;

[0041] Fig. 9 A partial view of a further embodiment of the parking lock arrangement is shown in the engaged state of the parking lock arrangement; and

[0042] Fig.10 Shows the corresponding parking lock device Fig. 9 , which is in the deployed state of the parking lock facility. DETAILED DESCRIPTION

[0043] Figure 1The diagram shows a highly simplified view of an electrically drivable axle 1 having a drive device 2. The drive device 2 comprises an electric machine 3, an inverter 4 for the electric machine 3 and a transmission device 5. An output shaft 6 of the electric machine 3 is arranged coaxially with a transmission input shaft 7 of the transmission device 5 and is connected thereto in a rotationally fixed manner.

[0044] The transmission input shaft 7 is in operative connection with the transmission output shaft 10 via the gear pairs 8, 9 of the transmission device 5. The gear pairs 8 and 9 are designed as spur gear toothings and respectively comprise a first spur gear 8A or 9A and a second spur gear 8B or 9B. Here, the first spur gear 8A of the first gear pair 8 is arranged on the transmission input shaft 7 in a rotationally fixed manner and meshes with the second spur gear 8B of the first gear pair 8. The second spur gear 8B of the first gear pair 8 is arranged on the intermediate shaft 51 in a rotationally fixed manner, on which the first spur gear 9A of the second gear pair 9 is mounted in a rotationally fixed manner. The first spur gear 9A of the second gear pair 9 meshes with the second spur gear 9B, which is arranged on the transmission output shaft 10 in a rotationally fixed manner.

[0045] The electric machine 3, the inverter 4 and the transmission device 5 are arranged in a transmission housing 11 or a housing of the drive device 2. Here, an intermediate wall 12 divides the interior of the transmission housing 11 into an oil-free interior 13 and an oil-filled interior 14.

[0046] In the switched-off operating state of the drive device 2, there is no torque on the transmission input shaft 7 on the side of the electric machine 3, so that the transmission output shaft 10 can rotate freely. In order to prevent the vehicle with the electrically drivable axle 1 from rolling away accidentally when parked, especially on a slope, the transmission device 5 additionally comprises a parking lock facility 15.

[0047] The transmission output shaft 10 can be rendered rotationally fixed by the parking lock arrangement 15. For this purpose, the parking lock arrangement 15 comprises a drive device 16 having an electric motor 16A. Figure 2 The parking lock mechanism 17 shown in the side view in FIG. 1 can be actuated by the drive device 16 or its electric motor 16A. The parking lock mechanism 17 also includes a locking element 18, which is designed as a so-called locking pawl. Under the corresponding actuation of the electric motor side, the locking element 18 can be brought into engagement with the parking lock wheel 19 or out of engagement. Figure 1 In the exemplary embodiment shown, the parking lock wheel 19 is arranged on the transmission input shaft 7 in a rotationally fixed manner.

[0048] In order to prevent the function of the drive device 16 and the electric motor 16A from being impaired by the oil entering the housing 20 of the electric motor 16A, the electric motor 16A is firmly connected to the intermediate wall 12 on the side of the intermediate wall 12 facing the oil-free interior space 13. In order to actuate the parking lock mechanism 17, the electric motor 16A penetrates the intermediate wall 12 with its drive shaft 21. In order to prevent the oil from the oil-filled interior space 14 from entering the oil-free interior space 13 through the intermediate wall 12 in an undesirable manner, a sealing unit (not shown in detail) is provided between the drive shaft 21 of the electric motor 16A and the intermediate wall 12.

[0049] In addition to the electric motor 16A, an electrical plug-in unit 22 is arranged in the oil-free interior 13 , by which the electric motor 16A can be driven and actuated in a desired manner. In addition, a lifting magnet 23 is also fixedly fastened to the intermediate wall 12 in the oil-free interior 13 .

[0050] The parking lock mechanism 17 is designed with a first drive element 24, which is Figure 2 The further illustrated manner and method is in engagement with a gear wheel 26 via a toothing 25. The gear wheel 26 is connected to the drive shaft 21 of the electric motor 16A in a rotationally fixed manner. The second drive element 27 is in operative connection with the first drive element 24 via a spring unit 28, which is supported both on the first drive element 24 and on the second drive element 27 and is preloaded between them in the installed state. The first drive element 24 can be pivoted about a fixed rotation axis 29 by the drive device 16. The second drive element 27 can be connected to the first drive element 24 in a rotationally fixed manner via a locking device 30 and can thus be pivoted together with the first drive element 24 about the rotation axis 29.

[0051] Furthermore, the parking lock arrangement 15 comprises an actuating element 31 which, depending on the pivoting movement of the second drive element 27, can be brought into engagement with or out of engagement with the locking element 18. Figure 2 In the manner and method further shown, the rotational movement of the transmission input shaft 7 can be blocked by the locking element 18 when the parking lock wheel 19 is engaged in a positively locking manner. Figure 4 When the engagement with the parking lock wheel 19 is disengaged in the manner and method shown, the rotational movement of the transmission input shaft 7 is released via the locking element 18 .

[0052] The second drive element 27 is connected to the operating element 31 via an operating rod 32. A spring element 33 and the operating element 31 supported by its spring and arranged on the operating rod 32 so as to be displaceable in the longitudinal direction are arranged on the operating rod 32.

[0053] Figure 2 and Figure 3The parking lock arrangement 15 is shown in each case in an engaged state and in a so-called normal operating state, wherein the first drive element 24 is connected to the second drive element 27 in a rotationally fixed manner via a blocking device 30. The blocking device 30 can be actuated by lifting the magnet 23 in the manner described further below.

[0054] Additionally, Figure 4 The parking lock arrangement 15 is shown in the extended operating state, in which the positive connection between the locking element 18 and the parking lock wheel 19 is cancelled by actuating the first drive element 24 and the second drive element 27 connected thereto in a rotationally fixed manner on the electric motor side. In this state, the locking element 18 is held disengaged from the parking lock wheel 19 by a further spring unit 34 operatively connected to the locking element 18. The spring unit 34 is designed as a torsion spring and is supported both on the locking element 18 and on the second drive element 27. The actuating element 31 is arranged between a guide element 35, which is fixed relative to the housing and is fixedly connected to the intermediate wall 12, and a side 36 of the locking element 18 facing away from the parking lock wheel 19, and the actuating element 31 with its conical region 37 contacts the tapered surface 35A of the guide element 35 and the tapered surface 38 of the locking pawl or the locking element 18.

[0055] To engage the parking lock arrangement 15, the motor 16A rotates the drive shaft 21 and the gear 26 connected thereto in a rotationally fixed manner. This causes the first drive element 24 to pivot about the rotation axis 29 in the rotation direction DR1. Figure 5 The manner and method further shown is fixedly connected to the first drive element 24 in the region of the pin-shaped projection 39 of the first drive element 24 and in the region of the locking element 40 of the locking device 30, so that the second drive element 27 is pivoted together with the first drive element 24 about the axis of rotation 29 in the direction of rotation DR1 by the electric motor 16A. This results in the actuating lever 32 being adjusted in the direction of the actuating element 31. In this case, the spring element 33 is compressed until the actuating element 31 moves along the inclined surface 38 of the locking element 18 and along the inclined surface 35A of the guide element 35 against the spring force of the spring element 33. The locking element 18 then engages with the parking lock wheel 19 against the spring force of the spring unit 34. This is the case when the two drive elements 24 and 27 are adjusted in the swivel direction DR1 by the electric motor 16A until the adjustment force, which is applied to the locking element 18 by the spring leg 34A of the spring unit 34 , drops to a level such that the locking element 18 can be pivoted about the rotation axis 41 and engage with the parking lock wheel 19 .

[0056] The locking element 40 penetrates the intermediate wall 12 and the first drive element 24 and is arranged coaxially with the rotation axis 29 and is designed to be longitudinally movable in the direction of the rotation axis 29. Figure 5 In the operating state shown, the lifting magnet 23 is not energized and the locking element 40 is held in engagement with the second drive element 27 by a spring not shown in the figure. Figure 5 It can be seen that the first drive element 24 is rotatably supported in the intermediate wall 12 via a bearing unit 48 designed as a rolling bearing. Depending on the respective application, the bearing unit 48 can also be designed as a sliding bearing.

[0057] The pin-shaped projection 39 penetrates the second drive element 27 in the region of two legs 27C, 27D, which are spaced apart from one another in the direction of the further axis of rotation 45. The spring unit 28 is also arranged on the pin-shaped projection 39 between the legs 27C and 27D, in the region of which the tilting moment acting on the second drive element 27 is supported in a simple manner.

[0058] In the engaged state of the parking lock arrangement 15, the first drive element 24 contacts the housing-side stop 42 and the second drive element 27 contacts the housing-side stop 43. In contrast, in the extended operating state of the parking lock arrangement 15, the first drive element 24 contacts the other housing-side stop 44, so that the first drive element 24 also has a defined position in the extended state of the parking lock arrangement 15.

[0059] If the parking lock arrangement 15 is to be switched to the extended operating state, the first drive element 24 is accordingly adjusted by the electric motor 16A in the swivel direction or rotational direction DR2 about the rotational axis 29, which also causes the second drive element 27 to pivot about the rotational axis 29. The pivoting of the second drive element 27 about the rotational axis 29 causes the guide element 31 of the actuating lever 32 to disengage from the inclined surface 38 of the locking element 18 and the inclined surface 35A of the guide element, and the locking element 18 is brought out of engagement with the parking lock wheel 19 by the active spring unit 34.

[0060] If a malfunction is detected in the area of ​​the drive device 16 in the extended operating state of the parking lock arrangement 15, which prevents the parking lock arrangement 15 from being engaged by the electric motor 16A, and there is a corresponding request to engage the parking lock arrangement 15, the lifting magnet 23 is electrically actuated accordingly. The lifting magnet 23 then disengages the locking element 40 from the second actuating element 27 against the spring force acting on the spring. This operating state of the locking element 40 is Figure 7 Further shown in .

[0061] Since the operative connection between the gear wheel 26 and the toothing 25 of the first drive element 24 is implemented as a self-locking type, the first drive element 24 is maintained in the Figure 4The pivoted position shown corresponds to the extended operating state of the parking lock arrangement 15. By pulling the blocking element 40 out of engagement with the second drive element 27, the rotationally fixed connection between the first drive element 24 and the second drive element 27 is released in the region of the axis of rotation 29. This results in the second drive element 27 being released by the spring unit 28, which is arranged between the two drive elements 24 and 27 in the prestressed state. Figure 4 The swiveled position shown is pivoted about the pin-shaped projection 39 in the direction of rotation DR1 until the second drive element 27 comes into contact with a stop 43 on the housing side.

[0062] By the pivoting movement of the second drive element 27 about the rotation axis 45 in the region of the pin-shaped projection 39, the actuating element 31 is pushed in the above-described manner between the guide bevel 35A of the guide element 35 and the guide bevel 38 of the locking element 18. As a result, a positive fit is established between the locking element 18 and the parking lock wheel 19.

[0063] In order to enable such an emergency unlocked parking lock arrangement 15 to be switched back to the extended operating state when necessary, an adjusting force F can be applied to the second drive element 27 by a corresponding device in order to impart a rotational movement about the rotation axis 45 in the rotation direction DR2 to the second drive element 27. This rotational movement causes the second drive element 27 to engage a further stop 46, which is arranged on the first drive element 24 and limits the rotational movement of the second actuating element 27 about the rotation axis 45, starting from a certain rotation angle. Here, the further stop 46 is positioned so that a hole 47 of the second drive element 27, which is used to accommodate the locking element 40, overlaps precisely next to the blocking element 40, and the blocking element 40 is spring-actuated into the hole 47. As a result, the parking lock arrangement 15 is extended again and the transmission input shaft 7 is rotatable.

[0064] In this case, the adjusting force F can be exerted mechanically as a compressive or tensile force on the second drive element 27 in order to switch the parking lock arrangement 15 into the extended operating state.

[0065] In addition, there is also the possibility that, when the drive device 16 is reestablishing normal function, the emergency unlocked parking lock arrangement 15 is switched back to the disengaged operating state by correspondingly actuating the first drive element 24 with respect to the electric motor 16A. If the first drive element 24 is pivoted in the rotational direction DR1 by the electric motor 16A, this results in the stop 46 coming into contact with the second drive element 27 and the second drive element 27 together with the pin-shaped projection 39 being adjusted until the hole 47 overlaps the locking element 40 and the locking element engages in the hole 47.

[0066] In normal operation of the parking lock arrangement 15, the actuating element 31 is actuated in the manner described above about the axis of rotation 29. In emergency operation of the parking lock arrangement 15, the actuating element 31 is adjusted in this manner about a further axis of rotation 45. The two axes of rotation 29 and 45 and the region 27A of the second drive element 27 are adjusted in the manner described below. Figure 8 3 and are positioned relative to one another and spaced apart from one another in a manner and method further described in , so that the docking point 50 of the actuating lever 32 occupies approximately the same position in the engaged state of the parking lock arrangement 15, regardless of whether the parking lock arrangement 15 is engaged in normal operation or in emergency operation. Figure 8 The docking point 50 is further identified by the reference numeral 50E. The docking point 50 is located in the extended operating state of the parking lock arrangement 15. Figure 8 The reference numeral 50A is used to further identify the positioning device 50. Depending on the predetermined, a vertical spacing 50AE is designed between the positioning devices 50A and 50E.

[0067] During the change of the operating state of the parking lock arrangement 15, starting from the extended state and during normal operation of the parking lock arrangement 15, the docking point 50 is transferred from the position 50A to the position 50E on the circumferential path of the circle K50N. The center point of the circle K50N is located on the rotation axis 29 of the first drive element 24. At the same time, the rotation axis 45 is transferred from the position 45A to the position 45E along the circumferential path of the circle K45N during normal operation of the parking lock arrangement 15.

[0068] If the parking lock arrangement 15 is extended and there is a request to engage the parking lock arrangement 15, the rotation axis 45 is maintained in the position 45A during emergency operation. As soon as the locking element 40 is disengaged from the hole 47 of the second drive element 27, the second drive element 27 is pivoted relative to the first drive element 24 by the spring unit 29 about the position 45A of the rotation axis 45 in the manner described above. This causes the docking point 50 to move from the position 50A along the circumferential path of a further circle K50NB into the position 50E, the center point of which is equal to the position 45A of the rotation axis 45. In addition, the position 45A of the hole 47 of the second drive element 27 about the rotation axis 45 is transferred along the circumferential path of an additional circle K47NB from the position 47N, in which the hole 47 overlaps the locking element 40, to the position further identified with the reference numeral 47NB.

[0069] The connecting line 29-50 through the rotation axis 29 and the position 50E, which the docking point 50 occupies in the engaged operating state of the parking lock arrangement 15, is located approximately centrally between the positions 45A and 45N of the swivel axis 45. This means that the swivel axis 45 is pivoted about the same swivel angle α at the position 45A and at the position 45E relative to the connecting line 29-50. This results in that the docking point 50 is always arranged in the position 50E in the engaged operating state of the parking lock arrangement, regardless of whether the parking lock arrangement 15 is engaged in normal operation or in emergency operation.

[0070] This is advantageous because the actuating element 31 is always actuated to the same extent by the parking lock mechanism 17 and independently of whether the parking lock arrangement 15 is engaged in normal operation or in emergency operation.

[0071] Fig. 9 and Fig.10 A partial view of a further embodiment of a parking lock arrangement 151 is shown, which differs from the parking lock arrangement 15 essentially only in the area of ​​the spring unit 34 and its support on the second drive element 27. For this reason, in the following description of the Fig. 9 and Fig.10 In the description of the parking lock arrangement 15, only the differences between the parking lock arrangement 15 and 151 are explained in detail. In other respects, with regard to the basic structural design and basic functions of the parking lock arrangement 151, see the description of the parking lock arrangement 151. Figures 1 to 8 In the above description, for the sake of clarity, the same reference numerals are used for components with the same structure and function.

[0072] When the parking lock arrangement 151 is engaged, the spring unit 34 of the parking lock arrangement 151 is engaged with its spring legs 34B according to Fig. 9 The manner and method shown disengages the second drive element 27. In other words, in the engaged state of the parking lock arrangement 151, the spring unit 34 is not supported on the second drive element 27. As a result, the spring unit 34 is released and the locking element 18 can be brought into engagement with the parking lock wheel 19 without overcoming the spring force of the spring unit 34.

[0073] In this operating state of the parking lock arrangement 151 , the spring unit 34 is still prestressed, since the spring leg 34A of the spring unit 34 is supported on the locking element 18 and the spring leg 34B is supported on the stop region 18A of the locking element 18 .

[0074] If the second drive element 27 is adjusted in the rotational direction DR2 for the purpose of disengaging the parking lock arrangement 151, the second drive element 27, starting from a defined pivoting angle, comes into contact with the spring leg 34B of the spring unit 34 with the contact area 27B. If the second drive element 27 is further adjusted in the rotational direction DR2, this results in the spring leg 34B being lifted from the stop area 18A and the spring unit 34 acting on the locking element 18 in the direction of the position of the locking element 18 which the locking element 18 occupies when the parking lock arrangement 151 is disengaged and the locking element 18 is disengaged from the parking lock wheel 18.

[0075] In the embodiment shown in the figures, the axes of rotation 29, 41 and 45 and the drive shaft 21 of the electric motor 16A extend parallel to one another. In addition, the first drive element 24, the second drive element 27, the locking element 18, the parking lock wheel 19 and the actuating lever 32 are located in parallel planes with only a small spacing from one another. This makes it possible for the parking lock arrangement 15 to have a small installation space requirement in the direction of the pivot axis 29.

[0076] Reference numerals

[0077] 1 Axle

[0078] 2 Drive equipment

[0079] 3 Motor

[0080] 4 Inverter

[0081] 5 Transmission device

[0082] 6 Output shaft of motor 3

[0083] 7 Transmission input shaft

[0084] 8 First gear pair

[0085] 8A First cylindrical gear of the first gear pair

[0086] 8B Second cylindrical gear of the first gear pair

[0087] 9 Second gear pair

[0088] 9A First cylindrical gear of the second gear pair

[0089] 9B Second cylindrical gear of the second gear pair

[0090] 10 Transmission output shaft

[0091] 11 Transmission housing or drive unit housing

[0092] 12 Middle wall

[0093] 13 Oil-free interior

[0094] 14 Fill the inner space with oil

[0095] 15 Parking lock facilities

[0096] 151 Parking lock facilities

[0097] 16 Drive unit

[0098] 16A Motor

[0099] 17 Parking lock mechanism

[0100] 18 Locking element

[0101] 18A Stop area

[0102] 19 Parking lock wheel

[0103] 20 Housing of motor 16A

[0104] 21 Drive shaft of motor 16A

[0105] 22 Electrical plug-in unit

[0106] 23 Lifting Magnet

[0107] 24 First drive element

[0108] 25 Tooth of first drive element

[0109] 26 Gear of drive shaft 21

[0110] 27 Second drive element

[0111] 27A Area of ​​the second driving element

[0112] 27B The second driving element's bonding area

[0113] 27C, 27D Legs of the second drive element

[0114] 28 Spring unit between drive elements

[0115] 29 The stationary axis of rotation of the first drive element 24

[0116] 30 Locking device

[0117] 31 Control elements

[0118] 32 Joystick

[0119] 33 Spring element on joystick

[0120] 34 Spring unit between second drive element and locking element

[0121] 34A Spring leg of spring unit 34

[0122] 34B Spring leg of spring unit 34

[0123] 35 Guide element

[0124] 35A Inclined surface of the guide element

[0125] 36 One side of the locking element 18

[0126] 37 Conical area of ​​the operating element

[0127] 38 Tapering surface of locking element

[0128] 39 Pin-shaped projection of the first drive element

[0129] 40 Locking element of the locking device 30

[0130] 41 Axis of rotation of locking element 18

[0131] 42 Housing-side stop of the first drive element 24

[0132] 43 Housing-side stop of the second drive element 27

[0133] 44 Further housing-side stop of the first drive element 24

[0134] 45 Further axis of rotation of the second drive element 27

[0135] 45A Positioning of the axis of rotation 45 in normal operation of the parking lock arrangement with the parking lock arrangement disengaged and in emergency operation of the parking lock arrangement with the parking lock arrangement engaged

[0136] 45E Positioning of the axis of rotation 45 during normal operation of the parking lock arrangement and when the parking lock arrangement is engaged

[0137] K45N Circle, on which the axis of rotation 45 pivots during normal operation of the parking lock arrangement

[0138] 46 Further stop of the second drive element 27

[0139] 47 Hole for further drive element 27

[0140] 47N Positioning of hole 47 in normal operation of the parking lock arrangement

[0141] 47NB Positioning of hole 47 in emergency operation of parking lock system

[0142] K47NB circle, hole 47 pivots on its circular path

[0143] 48 Support unit

[0144] 50 Connection point of the joystick on the second drive element

[0145] 50A Positioning of the docking point 50 in the extended state of the parking lock device 15

[0146] 50B Positioning of the docking point 50 when the parking lock arrangement 15 is engaged

[0147] 50AE Position the vertical spacing between 50A and 50E

[0148] K50N Circle, in normal operation of the parking lock arrangement the docking point 50 pivots on its circular path

[0149] K50NB Circle, in emergency operation of the parking lock system, the connection point 50 is pivoted on its circular path

[0150] 29-50 Connection cable

[0151] 51 Intermediate shaft

[0152] DR1, DR2 Rotation direction

[0153] F Adjustment force

[0154] α Swing angle

Claims

1. A parking lock device (15), the parking lock device comprising: - drive unit (16), - a first drive element (24), which can be pivoted about a stationary axis of rotation (29) by the drive device (16), - a second drive element (27), which is in operative connection with the first drive element (24) via a spring unit (28) and can be connected to the first drive element (24) in a rotationally fixed manner via a locking device (30) and can be pivoted together with the first drive element (24) about the axis of rotation (29) of the first drive element (24), and - an actuating element (31) which, as a function of the pivoting movement of the second drive element (27), can be brought into engagement with or out of engagement with a locking element (18), by means of which a rotational movement of the shaft (7) can be locked and released, - It is characterized by: - when the locking device (30) is deactivated, the second drive element (27) can be pivoted relative to the first drive element (24) about a further rotation axis (45) by the spring unit (28), wherein the further axis of rotation (45) is fixedly mounted on the first drive element (24) and is spaced apart from the axis of rotation (29) of the first drive element (24).

2. The parking lock device according to claim 1, characterized in that: The drive device (16) comprises an electric motor (16A), whose drive shaft (21) is connected in a rotationally fixed manner to a gear wheel (26) which is in meshing engagement with a toothing (25) of the first drive element (24).

3. The parking lock device according to claim 2, characterized in that: The tooth engagement between the gear wheel (26) and the toothing (25) of the first drive element (24) is designed to be self-locking.

4. The parking lock device according to any one of claims 1 to 3, characterized in that: The drive elements (24, 27) are designed as disks or levers.

5. The parking lock arrangement according to at least one of the preceding claims, characterized in that The rotation axis (29) and the further rotation axis (45) of the first drive element are parallel to one another.

6. The parking lock arrangement according to at least one of the preceding claims, characterized in that The spring unit (28) is designed as a torsion spring, which is arranged between the two drive elements (24, 27) in an active manner about the further rotation axis (45) and is supported at one end on the first drive element (24) and at the other end on the second drive element (27), wherein the spring unit (28) is prestressed between the drive elements (24, 27) so that the spring unit (28) exerts a spring force on the second drive element (27), which acts on the second drive element (27) in the direction of the positioning of the second drive element (27) when the locking element (18) locks the rotational movement of the shaft (7).

7. The parking lock arrangement according to at least one of the preceding claims, characterized in that The locking device (30) has a lifting magnet (23), by means of which a locking element (40) can be guided against a spring to disengage from the second drive element (27), wherein the locking element (40) can be displaced longitudinally along the rotation axis (29).

8. The parking lock arrangement according to at least one of the preceding claims, characterized in that The pivoting angle range of the first drive element (24) is limited by stops (42, 44) both in the direction of the position of the first drive element (24) when the locking element (18) locks the rotational movement of the shaft (7) and in the direction of the position of the first drive element (24) when the locking element (18) releases the rotational movement of the shaft (7).

9. The parking lock arrangement according to at least one of the preceding claims, characterized in that The pivoting angle range of the second drive element (27) is limited by stops (43, 46) not only in the direction of the position of the second drive element (27) when the locking element (18) locks the rotational movement of the shaft (7), but also in the direction of the position of the second drive element (27) when the locking element (18) releases the rotational movement of the shaft (7).

10. The parking lock device according to claim 9, characterized in that: A stop (46) which limits the pivoting angle range of the second drive element (27) in the direction of the position of the second drive element (27) which the second drive element (27) takes up when the locking element (18) releases the rotational movement of the shaft (7) is arranged in the region of the first drive element (24).

11. The parking lock device according to claim 10, characterized in that: The second drive element (27) can be transferred by the first drive element (24) in its pivoted swivel position relative to the first drive element (24) by means of a stop (46) in the region of the first drive element (24) into a swivel position in which the two drive elements (24, 27) are connected to each other via the locking element (40).

12. The parking lock arrangement according to at least one of the preceding claims, characterized in that A further spring unit (34) acts on the locking element (18) in the direction of the position of the locking element (18) when the locking element (18) releases the rotational movement of the shaft (7), wherein the further spring unit (34) is supported on the locking element (18) and the second drive element (27).

13. The parking lock device according to claim 12, characterized in that: A further spring unit (34) assigned to the locking element (18) acts on the second drive element (27) and the locking element (18) such that a spring characteristic curve of the further spring unit (34) has a decreasing profile.

Images