Parking lock device for a vehicle transmission and vehicle transmission

Abstract

The invention relates to a parking lock device (10) having a parking lock wheel (12), a pawl (20) which can be moved between a locking position and a release position, a control piston (26) which can be moved along a movement axis (32) and thus can cause the pawl (20) to be moved between the locking position and the release position, a locking lever (52) which can be pivoted about a pivot axis (54) and a reciprocating magnet (56) which can pivot the locking lever (52) from one position to another, wherein the pivot axis (54) extends perpendicular to the movement axis (32).

Description

Technical Field

[0001] This invention relates to a parking lock device for a vehicle transmission. Additionally, this invention relates to a vehicle transmission. Background Technology

[0002] DE 10 2015 008 709 A1 discloses a parking lock module for installation in a motor vehicle transmission, having at least one axially movable operating cone configured to operate a locking element configured to be form-fitted into a parking lock wheel.

[0003] EP 1 679 456 A1, DE 198 20 920A1 and EP 3 067 591 A1 show a parking lock device having a pawl, an operating piston for moving the pawl and a locking lever for locking the operating piston, wherein the pivot axis of the locking lever is arranged perpendicular to the movement axis of the operating piston.

[0004] On the other hand, DE 10 2018 216 728 A1 and DE 10 2012 004 157 A1 show a parking lock device with an operating piston. Here, although there is no locking lever that can rotate about a pivot axis, other locking mechanisms are provided. However, the direction of action of the reciprocating magnet that cooperates with the locking device is arranged parallel to the movement axis of the operating piston. Summary of the Invention

[0005] The objective of this invention is to provide a parking lock device for a vehicle transmission and a vehicle transmission having such a parking lock device, thereby maintaining a small structural space requirement for the parking lock device. In particular, the parking lock device should be designed to maintain a small structural space requirement for the vehicle transmission employing the parking lock device.

[0006] This task is accomplished by a parking lock device having the features described below and by a vehicle transmission having the features described below. Advantageous designs with suitable inventive improvements are also described below.

[0007] The first aspect of the invention relates to a parking lock device, also simply referred to as a parking lock, for use in vehicle transmissions, particularly for motor vehicles. This means that the vehicle transmission has a parking lock device in its fully manufactured state. For example, the vehicle transmission has a shaft in its fully manufactured state, which can be driven, for example, by a motor vehicle drive engine designed as an internal combustion engine or an electric motor. Furthermore, the motor vehicle equipped with the vehicle transmission has at least one wheel that can be driven by the drive engine via the shaft. Here, for example, the wheel is connected to or at least can be connected to the shaft in a torque-transmitting manner. The wheel is a ground contact element, through which the motor vehicle can be vertically supported or supported on the road. If the motor vehicle is traveling, for example, along the road and simultaneously vertically supported on the road by the wheel, the wheel rolls directly on the road. Here, the wheel rotates relative to the vehicle body, for example, designed as a self-supporting body. As will be explained in detail below, the parking lock device can prevent the shaft from rotating relative to the vehicle body and, consequently, prevent the wheel from rotating relative to the vehicle body, such that, for example, the motor vehicle can be locked by the parking lock device and cannot be undesirably rolled away, especially by means of the vehicle's parking or service brake. This is especially advantageous when parking motor vehicles, i.e., parking on a slope.

[0008] Motor vehicles have a transmission through which the wheels are driven by the engine. Here, a parking lock device is integrated into the transmission, for example, as a component of a transmission particularly designed as an automatic transmission. Here, the shaft is, for example, the shaft of the transmission. In particular, the shaft can be the output shaft of the transmission. If the parking lock device releases the shaft and, consequently, the wheels, the shaft and wheels can rotate relative to the transmission housing, also known as the transmission case. However, the parking lock device can lock the shaft and, consequently, the wheels in a manner that prevents rotation relative to the transmission housing, thereby preventing the shaft and wheels from rotating relative to the transmission housing and relative to the vehicle body. Thus, the motor vehicle is locked and cannot be unintentionally rolled away.

[0009] The parking lock device includes a parking lock wheel that is anti-rotatably connected to or attached to the shaft of the vehicle's transmission. Additionally, the parking lock device includes a pawl that is movable relative to the parking lock wheel and, for example, relative to the transmission housing, between at least one locked position that anti-rotationally locks the parking lock wheel and at least one released position that releases the parking lock wheel to allow rotation. The pawl is, for example, movably held on the transmission housing. In the locked position, the pawl engages with the parking lock wheel in a form-fitting manner, thereby locking the parking lock wheel and, consequently, the shaft, preventing rotation relative to the transmission housing. Thus, the wheel is also anti-rotationally locked, thereby locking the vehicle and preventing undesirable rollaway. In the released position, the pawl, for example, does not engage with the parking lock wheel, so the parking lock wheel and, consequently, the shaft, can rotate relative to the transmission housing. Therefore, the wheel can also rotate relative to the vehicle body.

[0010] The parking lock device also includes an operating piston, which is movable along a movement axis relative to the parking lock wheel, the pawl, and preferably also relative to the transmission housing. Movement of the operating piston causes the pawl to move between a locked position and a released position. This specifically means that if the operating piston is moved, for example, in a first direction extending parallel to or coinciding with the movement axis, relative to the parking lock wheel, the pawl, and the transmission housing, the pawl can be moved from the released position to the locked position, for example. If the operating piston is moved, for example, in a second direction extending parallel to or coinciding with the movement axis and opposite to the first direction, relative to the parking lock wheel, the pawl, and the transmission housing, the pawl can be moved from the locked position to the released position, for example, in such a way that the operating piston allows the pawl to move from the locked position to the released position, i.e., does not resist such pawl movement. For example, the operating piston can move in the first direction by means of a mechanical spring, especially a mechanical compression spring. Alternatively or additionally, the piston can be moved in a second direction, for example, hydraulically, in particular overcoming the action of the mechanical spring, that is, overcoming the spring force provided by the mechanical spring.

[0011] Additionally, the parking lock device has a locking lever that is pivotable about a pivot axis relative to the operating piston and preferably also relative to the transmission housing between a locked position where at least one operating piston is locked to prevent movement along the axis of movement, and an unlocked position where at least one operating piston is released to allow movement along the axis of movement. The locked position is the first position of the locking lever. In other words, the locked position is referred to as the first position. The unlocked position is the second position of the locking lever. In other words, the unlocked position is also referred to as the second position. For example, in the locked position, the locking lever prevents the operating piston from moving in the first direction, particularly by means of the aforementioned spring force, or by means of a mechanical spring. However, in the unlocked position, the locking lever releases the operating piston, such that, for example, in the unlocked position of the locking lever, the operating piston can be moved in the first direction by means of a mechanical spring, i.e., by means of a spring force provided by a mechanical spring.

[0012] Furthermore, the parking lock device includes a reciprocating magnet, thereby allowing the locking lever to pivot from one position to another. Preferably, one position is a locked position, and thus the other position is preferably an unlocked position. However, it is obviously conceivable that one position is an unlocked position and the other position is a locked position. However, a high level of security can be achieved when one position is locked and the other position is unlocked, because, for example, the locking lever then remains in the locked position and can be held in that position without requiring power to the parking lock device from the outside, i.e., from an external accessory.

[0013] To keep the structural space requirements of the parking lock device within a very small range, the pivot axis is specified, in a manner known per se, as extending perpendicular to the movement axis. This specifically means that the pivot axis extends perpendicular to a first plane, such that the pivot axis is a normal to the first plane. The movement axis extends perpendicular to a second plane, such that the movement axis is a normal to the second plane. Here, the characteristic of "the pivot axis extending perpendicular to the movement axis" means that the first plane extends perpendicular to the second plane, or vice versa. The present invention is based on the understanding that, in common parking lock devices, the pivot axis extends parallel to the movement axis. Consequently, the reciprocating magnet must be arranged laterally and therefore disadvantageously, resulting in excessive structural space requirements. Furthermore, the locking lever can only move from one position to another with strong friction, i.e., by overcoming significant frictional forces using the reciprocating magnet; therefore, the reciprocating magnet must be designed in a way that is advantageous in terms of structural space, weight, and cost.

[0014] Because the pivot axis extends or is arranged perpendicular to the movement axis, the reciprocating magnet can be arranged in a way that is very advantageous in terms of structural space, so that the overall structural space requirement of the parking lock device can be kept very small. On the other hand, the reciprocating magnet can overcome only a small amount of friction to pivot the locking lever from one position to another. Thus, the reciprocating magnet itself can be designed in a way that is very advantageous in terms of structural space, cost, and weight.

[0015] To keep the structural space requirements of the parking lock device and the vehicle transmission containing the parking lock device within a very small range, the present invention specifies that the reciprocating magnet has a magnetic element that can provide or will provide a magnetic field. This magnetic element can be a permanent magnet, thereby providing or providing the magnetic field in a particularly permanent manner. It is also conceivable that the magnetic element is an electromagnet, which, for example, has at least one or exactly one coil. The electromagnet can provide a magnetic field by supplying electrical energy, especially current, to it. Without supplying electrical energy to the electromagnet, a magnetic field cannot be provided by the magnetic element. Therefore, the locking lever can be moved from one position to another as needed. The reciprocating magnet also has at least one operating element that can be translated relative to the magnetic element and relative to the locking lever in the direction of action by means of the magnetic field. This, for example, means that the magnetic field can interact with the operating element, especially with the material used to form the operating element, i.e., generate, for example, an operating force, also called a magnetic field, that acts at least indirectly and especially directly on the operating element by the magnetic field. With the aid of the operating force, the operating element can be translated relative to the magnetic element and relative to the locking lever in the direction of action, thereby pivoting the locking lever from one position to another. In other words, if the operating element is translated in the direction of action by means of a magnetic field or magnetic force, the locking lever is thus pivoted from one position to another. To maintain a small structural space requirement, the direction of action extends parallel to the axis of movement, or coincides with the axis of movement.

[0016] Furthermore, this invention specifies that the reciprocating magnet, locking lever, and operating piston are connected along the moving axis, i.e., along a straight line extending parallel to or coinciding with the moving axis, in the following order, i.e., arranged one after another: reciprocating magnet, locking lever, operating piston. Therefore, the structural space requirement of the vehicle transmission including the parking lock device can be further reduced.

[0017] Additionally, the parking lock device, for example, has an operating cone that can be moved by moving an operating piston along a movement axis relative to the pawl and the parking lock wheel, and also relative to the transmission housing. Here, the operating piston is engaged with the operating cone, for example, or vice versa. The operating cone is engaged with the operating piston in such a way that, by moving the operating piston in a first direction, the operating cone can move in the first direction relative to the parking lock wheel and relative to the pawl, thereby allowing the pawl to move from the released position to the locked position via or by means of the operating cone. By moving the operating piston in a second direction, for example, the operating cone can move in the second direction relative to the pawl and relative to the parking lock wheel, thereby allowing the pawl to move from the locked position to the released position, i.e., thereby allowing the pawl to move from the locked position to the released position. The operating cone, for example, has an outer peripheral circumferential surface that is conical, i.e., designed as a cone or a truncated cone, and is, for example, widened in the second direction or narrowed in the first direction. If, for example, the operating cone is moved in a first direction, the outer peripheral surface of the cone slides on the pawl, thereby moving the pawl from the released position to the locked position. If the operating cone is subsequently moved, for example, in a second direction, the pawl can then move from the locked position to the released position.

[0018] In this preferred embodiment, the reciprocating magnet, the locking lever (also known as the stop lever), the operating piston, and the actuating cone are arranged in the following order along a movement axis that coincides with the axis of the reciprocating magnet: reciprocating magnet, locking lever, actuating piston, and operating cone. This maintains a very small space requirement.

[0019] Another embodiment is characterized in that the pawl is pivotable about its axis between the released and locked positions relative to the parking lock wheel and preferably also relative to the transmission housing. To keep the structural space requirements of the parking lock device within a very small range, it is preferably specified that the pawl axis extends perpendicular to the axis of movement. Therefore, the pivot axis extends parallel to the pivot axis and thus perpendicular to the first plane.

[0020] This fact indicates that it is particularly advantageous that the parking lock wheel and thus the shaft can rotate about the axis of rotation relative to the operating piston and thus relative to the transmission housing in the released position, and are locked in the locked position by means of a pawl, preventing rotation about the axis of rotation. In order to maintain a small structural space requirement at this time, it is preferably specified that the axis of rotation extends parallel to the pawl axis and thus parallel to the pivot axis and thus perpendicular to the first plane.

[0021] In another particularly advantageous embodiment of the invention, the parking lock device includes a piston rod arranged coaxially with respect to the operating piston and movable along the direction of movement of the operating piston relative to the pawl, the parking lock wheel, and the transmission housing. The piston rod has, in particular, a recess, also called an engagement profile, at its end facing the locking lever, in which the locking lever, in the locked position, is at least partially received or accommodated. Thus, the operating piston is locked and prevented from moving along the axis of movement. In other words, the locking lever can be inserted into the corresponding engagement profile in the locked position, thereby engaging with the operating piston in a form-fitting manner. Thus, the operating piston can be locked in a structurally advantageous and reliable manner, preventing undesirable movement, particularly in the first direction.

[0022] Here, it is particularly advantageous that the actuating piston is constructed separately from the piston rod, is mounted on the piston rod, and is fixed to the piston rod at least along the axis of movement.

[0023] In order to maintain a very small structural space requirement at this time, in other designs of the invention, the actuating piston is pressed against the piston rod and thus fixed to the piston rod at least along the axis of movement.

[0024] In order to achieve a high level of security for the parking lock device in a way that is particularly advantageous in terms of structural space, other designs of the present invention specify that the parking lock device has a moving member provided in addition to the reciprocating magnet. The moving member is hydraulically movable relative to the locking lever in a direction of movement extending parallel to the moving axis, thereby pivoting the locking lever from one position to another.

[0025] A second aspect of the invention relates to a vehicle transmission having a parking lock device according to a first aspect of the invention. The advantages and advantageous designs of the first aspect of the invention should be considered as advantages and advantageous designs of the second aspect of the invention, and vice versa. Attached Figure Description

[0026] From the following description of preferred embodiments and in conjunction with Figure 1 Other advantages, features and details of the present invention are thus obtained.

[0027] Figure 1A partial sectional schematic diagram shows a parking lock device 10, also simply referred to as a parking lock, for use in a motor vehicle (not shown), and particularly for a vehicle transmission (not further shown) of a motor vehicle. The motor vehicle has a drive engine, a vehicle transmission, and at least two wheels, also referred to as wheels, which are driven by the drive engine via the vehicle transmission. Thus, the motor vehicle as a whole is driven. Here, the parking lock device 10 is a component of the vehicle transmission. The vehicle transmission has a transmission housing and shafts, such as the output shaft of the vehicle transmission, which are permanently engaged to the wheels in a torque-transmitting manner. Detailed Implementation

[0028] The parking lock device 10 here has a parking lock wheel 12 arranged coaxially with and mounted on the shaft, which is permanently and non-rotatably connected to the shaft. The parking lock wheel 12 has a tooth structure 14 having a plurality of teeth 16 arranged sequentially and spaced apart from each other in the circumferential direction of the parking lock wheel 12. The respective tooth gaps 18 of the tooth structure 14 are arranged between every two teeth 16 that are successively or immediately connected in the circumferential direction of the parking lock wheel 12.

[0029] Additionally, the parking lock device 10 has a pawl 20, which is positioned relative to the parking lock wheel 12 and relative to the transmission housing about the pawl axis 22 at least one such position. Figure 1 The lock position is pivotable between at least one release position. In the lock position, the pawl 20 is inserted into one of the toothed gaps 18 and further engaged in the toothed structure 14, thereby engaging the parking lock wheel 12 in a form-fitting manner and cooperating with the shaft. Thus, in the lock position, the parking lock wheel 12 and, consequently, the shaft are fixed by means of the pawl 20 and cannot rotate about the axis of rotation 24 relative to the transmission housing. In other words, in the lock position, the parking lock wheel 12 and, consequently, the shaft cannot rotate about the axis of rotation 24 relative to the transmission housing. However, in the release position, the pawl 20 disengages from the parking lock wheel 12, so that the pawl 20 does not engage with the toothed structure 14 in the release position. Thus, in the release position, the pawl 20 allows the parking lock wheel 12 and, consequently, the shaft to rotate about the axis of rotation 24 relative to the transmission housing.

[0030] Additionally, the parking lock device 10 includes an operating piston 26, which is movably housed within the housing 28 of the parking lock device 10. Furthermore, the parking lock device 10 includes a piston rod 30, wherein the operating piston 26 is separately constructed from and particularly fixedly connected to the piston rod 30. Thus, the operating piston 26 and the piston rod 30 are movable along the axis of movement 32 relative to the parking lock wheel 12, relative to the pawl 20, relative to the housing 28, and relative to the transmission case, thereby causing the pawl 20 to move between a locked position and a released position. The operating piston 26 and the housing 28 each partially define a working chamber 34 into which fluid, particularly hydraulic fluid, can be guided. Additionally, the parking lock device 10 includes a mechanical spring 36 acting as a mechanical compression spring, which is supported, at least indirectly and particularly directly, on the operating piston 26 along the axis of movement, and at least indirectly and particularly directly on the housing 28. If hydraulic fluid is guided into the working chamber 34, the piston 26, also known as the piston actuator, drives the piston rod 30 together in the direction of... Figure 1 The spring 36 moves relative to the housing 28 in a first direction, indicated by arrow 38 and extending parallel to or coinciding with the movement axis 32. This compresses the spring 36, thereby providing the spring force through the spring 35. The spring force moves towards the housing 28 in a direction parallel to or coinciding with the movement axis 32. Figure 1 The second direction, indicated by arrow 40, extends parallel to or coincides with the movement axis 32, opposite to the first direction. If hydraulic fluid is discharged from the working chamber 34, or if hydraulic fluid is allowed to flow out of the working chamber 34, the spring 36 can be at least partially relaxed. As a result, the piston and the piston rod 30 are moved relative to the housing 28 along the movement axis 32 in the second direction by means of the spring 36, i.e., by means of the spring force provided by the spring 36.

[0031] Additionally, the parking lock device 10 includes a shift lever mechanism 42, which has a shift lever 44, another mechanical spring 46, and an operating cone 48, also referred to as a cone or locking cone. The shift lever 44 is configured separately from, for example, the piston rod 30, and is particularly connected, especially hinged, to the piston rod 30 such that the shift lever 44 is movable along the axis of movement with the piston rod 30. If, for example, the piston rod 30 is moved relative to the housing 28 in a first direction, the shift lever 44 thereby moves relative to the housing 28 in the first direction with the piston rod 30. If the piston rod 30 is moved in a second direction, the shift lever 44 thereby moves relative to the housing 28 in the second direction with the piston rod 30. The operating cone 48 is movable relative to the shift lever 44, for example, in the axial direction. In particular, the operating cone 48 can be movably mounted on the shift lever 44 in the axial direction relative to the shift lever 44. Thus, when the operating cone 48 is moved relative to the shift lever 44, for example, the operating cone 48 is guided by the shift lever 44. The operating cone 48 is supported or rests on the shift lever 44 axially by a spring 46, also called a locking cone spring. In other words, the spring 46 is supported or rests on the operating cone 48, at least indirectly and especially directly, on the shift lever 44 axially, and at least indirectly and especially directly on the shift lever 44. In at least one position of the shift lever 44 relative to the piston rod 30, the axial direction of the shift lever 44 coincides, for example, with the moving axis 32. This is in Figure 1 As shown in the diagram. If, for example, the operating cone 48 is moved relative to the shift lever 44 in a first direction, the spring 46 is thereby compressed, causing the spring 46 to provide a spring force. With the aid of this spring force, the operating cone 48 can be moved relative to the shift lever 44 in a second direction.

[0032] Figure 1 The parking lock device 10 is shown in either the engaged or engaged state. In the engaged or engaged state, the pawl 20 is in its locked position. To engage or disengage the parking lock device 10, i.e., to move the parking lock device 10 from its engaged state to its disengaged or disengaged state (at which point the pawl 20 releases the parking lock wheel 12 to rotate about the rotation axis 24 relative to the transmission housing), the piston and consequently the piston rod 30 and the shift lever 44, and the operating cone 48, are moved in a first direction relative to the housing 28. This causes or allows the pawl 20 to move from the locked position to the released position. Generally, it can be seen that the shift lever mechanism 42 can move relative to the housing 28 along the movement axis 32 with the piston rod 30.

[0033] To engage or disengage the parking lock device 10, hydraulic fluid is allowed to flow out of the working chamber 34. As a result, the piston, and consequently the piston rod 30 and the shift lever 44, are moved in a second direction relative to the housing 28 by means of the spring 36. If the parking lock wheel is in a rotational position at this time that allows the pawl 20 to engage in one of the toothed slots 18, the operating cone 48, especially the conical outer peripheral surface 50 of the operating cone 48, slides along the pawl 20, causing the pawl 20 to move from the released position to the locked position by means of the peripheral surface 50.

[0034] However, if a so-called "tooth-on-tooth" state occurs, i.e., the pawl 20 cannot be moved to insert into one of the tooth gaps 18, but instead is supported and in contact with one of the teeth 16, thus initially preventing the pawl 20 from moving from the released position to the locked position, then although the piston, piston rod 30, and shift lever 44 move relative to the housing 28 in the first direction, movement of the operating cone 48 in the first direction is initially prevented, thereby tensioning, and in particular, compressing, the spring 46. Thus, the spring 46 applies a spring force to the operating cone 48. If, for example, the vehicle then slides a further distance, causing the axle and subsequently the parking lock wheel 12 to rotate relative to the transmission housing about the rotation axis 24, i.e., eliminating the tooth-on-tooth state, and thus allowing the pawl 20 to move into one of the tooth gaps 18, the spring 46 relaxes, allowing the operating cone 48 to move relative to the housing 28 in the first direction by means of the spring 46. In this case, the circumferential surface 50 slides along the pawl 20, thereby moving the pawl 20 into one of the tooth gaps 18, and thus into the locked position.

[0035] In addition, the parking lock device 10 has a locking lever 52, also known as a stop lever, which is pivotable about a pivot axis 54 relative to the housing 28 and relative to the transmission housing at at least one such position. Figure 1 The device pivots between a locked position and at least one unlocked position. In the locked position, when the parking lock device 10 is engaged, the piston rod 30 and consequently the actuating piston 26 are locked relative to the housing 28 in a second direction by means of the locking lever 52, particularly in a form-fit manner, overcoming the spring force provided by the spring 36, thereby preventing undesirable engagement of the parking lock device 10 by the spring force provided by the spring 36. However, in the unlocked position, the locking lever 52 releases the piston rod 30 and the actuating piston 26 to cause or potentially cause movement in the second direction relative to the housing 28, for example, by means of the spring force provided by the spring 36. Thus, in the unlocked position, the spring 36 causes the piston rod 30 to move together with the actuating piston 26 in the second direction relative to the housing 28, thereby causing the pawl 20 to move from the released position to the locked position.

[0036] Additionally, the parking lock device 10 includes an actuator designed as a reciprocating magnet 56, thereby allowing the locking lever 52 to pivot relative to the housing 28 about a pivot axis 54 from a locked position to an unlocked position when using electrical energy or current. Regarding Figure 1 As shown in the diagram, the reciprocating magnet 56 can pivot the locking lever 52 clockwise relative to the housing 28, thereby pivoting it from the locked position to the unlocked position. For this purpose, the reciprocating magnet 56 can cooperate at least indirectly, and especially directly, with the first region B1 of the locking lever 52. This means that the reciprocating magnet 56, and especially the actuating element of the reciprocating magnet 56, can apply force to region B1 of the locking lever 52. This force generates a torque acting about the pivot axis 54, which is related to... Figure 1 The diagram shows a clockwise rotation. This causes the locking lever 52 to pivot from the locked position to the unlocked position. It can be seen that the locking lever 52 can pivot about the pivot axis 54 in a first pivot direction or rotation direction, thereby pivoting from the locked position to the unlocked position. Here, the locking lever 52 is equipped with another mechanical spring 58, also called a return spring. If the locking lever 52 is pivoted in the first rotation direction and thus from the locked position to the unlocked position, the spring 58 is tensioned, and in particular compressed. As a result, the spring force provided by the spring 58 acts on the locking lever 52 such that the spring force provided by the spring 58 and acting on the locking lever 52 generates a second torque, which acts about the pivot axis 54 in a second rotation direction opposite to the first rotation direction. Therefore, the locking lever 52 can, in particular, pivot in the second rotation direction by means of the second torque after pivoting in the first rotation direction and thus return from the unlocked position to the locked position, and is particularly held in the locked position. Here, the spring 58 is supported or supported on the locking rod 52 at least indirectly and especially directly, and on the housing 28 at least indirectly and especially directly.

[0037] In order to keep the structural space requirements of the parking lock device 10 within a very small range, the pivot axis 54 extends perpendicular to the movement axis 32. In other words, the pivot axis 54 is arranged perpendicular to the movement axis 32.

[0038] The parking lock device 10 also includes a cover 60, which is separately formed from and connected to the housing 28, and partially defines the working chamber 34. The cover 60 has a through hole 62 through which a piston rod 30 passes. Thus, the cover 60 is a piston rod guide mechanism, by which the piston rod 30 is guided or can be guided when moving relative to the housing 28 and relative to the cover 60 and along the movement axis 32.

[0039] The reciprocating magnet 56 has at least one, especially in Figure 1The magnet 64, schematically shown, is designed, for example, as an electromagnet. A magnetic field is provided or can be supplied by the magnet 64. Additionally, the reciprocating magnet 56 includes an operating member 66, which, by means of the magnetic field, can translate relative to the magnet 64, relative to the locking lever 52, and relative to the housing 28 in the direction of action indicated by the arrow and thus coinciding with the second direction. If the operating member 66 is moved by means of the magnet 64 in the direction of action and further in the second direction, the operating member 66 applies the aforementioned force to region B1, thereby pivoting the locking lever 52 relative to the housing 28 in the first rotational direction. This pivots the locking lever 52 from the locked position to the unlocked position. Here, the direction of action extends parallel to the movement axis 32, or coincides with the movement axis 32. Furthermore, the reciprocating magnet 56, the locking lever 52, the piston rod 30, and the shift lever mechanism 42 are arranged sequentially along the movement axis 32 in the following order: reciprocating magnet 56, locking lever 52, operating piston 26, shift lever mechanism 42. In addition, the pawl axis 22 extends perpendicular to the moving axis 32. The rotation axis 24 extends parallel to the pawl axis 22 and therefore also perpendicular to the moving axis 32.

[0040] To reliably lock the actuating piston 26 and piston rod 30 relative to the housing 28 along the movement axis 32 in a second direction, the piston rod 30 has a recess 68, also known as an engagement profile, at its end E facing the locking lever 52, which extends, for example, completely around the piston rod 30 in the circumferential direction. If the parking lock device 10 is engaged and the locking lever 52 is in its locked position, the locking lever 52 is inserted into the recess 68, thereby fixing the piston rod 30 and, consequently, the actuating piston 26 in a form-fit manner, preventing movement along the movement axis 32.

[0041] Additionally, the parking lock device 10 has a piston-shaped moving member, excluding the reciprocating magnet 56, which partially defines another working chamber 72 besides the working chamber 34. The working chamber 72 is also partially defined by the housing 28. Hydraulic fluid or the hydraulic fluid can be guided into the working chamber 72. This causes the piston 70 to move relative to the housing 28 in a first direction. Consequently, the piston 70 applies a second force to a second region B2 of the locking lever 52. This second force generates another torque acting about the pivot axis 54 in a first rotational direction. Therefore, the locking lever 52 can also pivot from the locked position to the unlocked position by means of the piston 70. Here, region B1 is arranged on one side of the pivot axis 54, while region B2 is arranged on the other side of the pivot axis 54, particularly with respect to the direction extending perpendicular to the pivot axis 54 and perpendicular to the moving axis 32.

[0042] The tandem arrangement of the reciprocating magnet 56, locking lever 52, piston rod 30, and shift lever 44 allows for a very elongated reciprocating magnet 56, resulting in a design that is advantageous in terms of structural space and weight. For example, the reaction force acting on the locking lever 52, caused by the spring 58 holding it in the locked position by spring force, is supported only on the pivot axis 54. Thus, the locking lever 52 pivots from the locked position to the unlocked position with minimal friction, and can therefore be unlocked. Therefore, only a small operating force needs to be applied to the locking lever 52 to unlock it, allowing the reciprocating magnet 56 to be sized in a way that is very advantageous in terms of structural space. Therefore, the structural space requirements and weight of the parking lock device 10 can be kept within a very small range.

[0043] List of reference numerals

[0044] 10 Parking lock device

[0045] 12 Parking wheel locks

[0046] 14. Tooth structure

[0047] 16 teeth

[0048] 18 tooth gaps

[0049] 20 Claws

[0050] 22. Paw Axis

[0051] 24. Rotation axis

[0052] 26. Manipulate the piston

[0053] 28. Shell

[0054] 30 Piston Rod

[0055] 32 Moving axis

[0056] 34 Working Chamber

[0057] 36 Springs

[0058] 38 arrows

[0059] 40 arrows

[0060] 42. Gear shift mechanism

[0061] 44. Gear shift lever

[0062] 46 Springs

[0063] 48 Operating cone

[0064] 50 Outer peripheral lateral surface

[0065] 52 Locking lever

[0066] 54 Pivot axis

[0067] 56 Reciprocating magnets

[0068] 58 Springs

[0069] 60 caps

[0070] 62 through holes

[0071] 64 Magnet components

[0072] 66 Operating components

[0073] 68 recess

[0074] 70 Piston

[0075] 72 Working Chamber

[0076] Areas B1 and B2

[0077] E-end

Claims

1. A parking lock device (10) for a vehicle transmission, comprising: - Parking lock wheel (12), which is able to be connected to the shaft of the vehicle's transmission in a non-rotational manner; - A pawl (20) that is movable relative to the parking lock wheel (12) between at least one locked position in which the parking lock wheel (12) is fixed in a non-rotational manner and at least one released position in which the parking lock wheel (12) is released to rotate. - An operating piston (26) is movable along the movement axis (32) relative to the parking lock wheel (12) and relative to the pawl (20), thereby causing the pawl (20) to move between the locked position and the released position; - A locking lever (52) pivotable about a pivot axis (54) relative to the actuating piston (26) between at least one locked position as a first position and at least one unlocked position as a second position, wherein, In the locked position, the actuating piston (26) is locked to prevent movement along the moving axis (32), while in the unlocked position, the actuating piston (26) is allowed to move along the moving axis (32); and - A reciprocating magnet (56) thereby enabling the locking lever (52) to pivot from the first position to the second position or from the second position to the first position. The pivot axis (54) extends perpendicular to the moving axis (32). Its characteristics are, The reciprocating magnet (56) has at least one magnet (64) that provides or is capable of providing a magnetic field and at least one operating member (66) that is capable of translating relative to the magnet (64) and relative to the locking lever (52) in the direction of action (40) by means of the magnetic field, so that the locking lever (52) can pivot from the first position to the second position or from the second position to the first position, wherein the direction of action (40) extends parallel to or coincides with the axis of movement (32). The reciprocating magnet (56), the locking lever (52), and the operating piston (26) are arranged in the following order along the moving axis (32): reciprocating magnet (56), locking lever (52), and operating piston (26).

2. The parking lock device (10) according to claim 1, characterized in that, The pawl (20) is pivotable and thus movable about the pawl axis (22) between the released position and the locked position, wherein the pawl axis (22) extends perpendicular to the moving axis (32).

3. The parking lock device (10) according to claim 2, characterized in that, The parking lock wheel (12) can rotate about the rotation axis (24) in the released position and is locked by means of the pawl (20) in the locked position and cannot rotate about the rotation axis (24), wherein the rotation axis (24) extends parallel to the pawl axis (22).

4. The parking lock device (10) according to any one of claims 1 to 3, characterized in that, A piston rod (30) is provided, which is coaxially arranged with the actuating piston (26) and can move along the moving axis (32) with the actuating piston (26). The piston rod has at least one recess (68), and the locking rod (52) in the locked position can be at least partially accommodated in the recess, so that the actuating piston (26) can be locked and cannot move along the moving axis (32).

5. The parking lock device (10) according to claim 4, characterized in that, The actuating piston (26) is separately constructed from the piston rod (30), is mounted on the piston rod (30), and is fixed on the piston rod (30) at least along the moving axis (32).

6. The parking lock device (10) according to claim 5, characterized in that, The manipulating piston (26) is pressed against the piston rod (30) and is thus fixed to the piston rod (30) at least along the axis of movement (32).

7. The parking lock device (10) according to any one of claims 1 to 3, characterized in that, In addition to the reciprocating magnet (56), a moving member (70) is provided. This moving member is hydraulically movable relative to the locking lever (52) in a movement direction (38) extending parallel to the moving axis (32). Therefore, the locking lever (52) can pivot from the first position to the second position or from the second position to the first position.

8. The parking lock device (10) according to claim 4, characterized in that, In addition to the reciprocating magnet (56), a moving member (70) is provided. This moving member is hydraulically movable relative to the locking lever (52) in a movement direction (38) extending parallel to the moving axis (32). Therefore, the locking lever (52) can pivot from the first position to the second position or from the second position to the first position.

9. The parking lock device (10) according to claim 5, characterized in that, In addition to the reciprocating magnet (56), a moving member (70) is provided. This moving member is hydraulically movable relative to the locking lever (52) in a movement direction (38) extending parallel to the moving axis (32). Therefore, the locking lever (52) can pivot from the first position to the second position or from the second position to the first position.

10. The parking lock device (10) according to claim 6, characterized in that, In addition to the reciprocating magnet (56), a moving member (70) is provided. This moving member is hydraulically movable relative to the locking lever (52) in a movement direction (38) extending parallel to the moving axis (32). Therefore, the locking lever (52) can pivot from the first position to the second position or from the second position to the first position.

11. A vehicle transmission having a parking lock device (10) according to any one of claims 1 to 10.

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