Parking lock device for a motor vehicle

Abstract

The invention relates to a parking lock device (1) for a motor vehicle, comprising: - a housing (7), - a first parking lock wheel (2) which is rotationally rigidly connected to a transmission shaft (8), - a first blocking element (4) which is rotationally rigidly connected to the housing (7), is axially movable relative to the housing (7) and is designed to rotationally rigidly connect the first parking lock wheel (2) to the housing (7), and - a ramp plate (3) which is rotatably disposed on the housing (7), wherein: a ramp mechanism (9) is designed to convert a rotational movement of the ramp plate (3) into an axial movement of the first blocking element (4); the ramp mechanism (9) has a force-introducing ramp (11) connected to the ramp plate (3) and a force-receiving ramp (12) rotationally rigidly and axially rigidly connected to the first blocking element (4). The force-receiving ramp (12) is disposed on an axial side of the ramp plate (3) remote from the first blocking element (4).

Description

[0001] Parking lock device for a motor vehicle

[0002] The invention relates to a parking lock device for a motor vehicle according to the features of the preamble of claim 1.

[0003] From the prior art, as described in DE 102022 113 868 A1, a parking lock with a claw clutch and ball ramp is known. The parking lock is equipped with a first section with a first set of teeth and a second section with a second set of teeth configured to engage with the first set of teeth. The first section is coupled to a rotating part of the vehicle, while the second section is coupled to a stationary part of the vehicle. The second section comprises actuating devices for triggering the sliding of the second set of teeth, the actuating devices comprising a movement source, elastic elements, and one or more ramps.

[0004] DE 102021 114251 A1 discloses a parking lock device for a vehicle transmission, comprising a parking lock gear and a ratchet gear that is axially movable between a locking position and a release position. DE 102020 116214 A1 discloses a parking lock device that also has a parking lock gear and a ratchet gear that is axially displaceable via a ramp mechanism. Furthermore, DE 102020 122 376 A1 discloses a parking lock device that exhibits all the features of the preamble of patent claim 1.

[0005] The invention is based on the object of providing a parking lock device for a motor vehicle which is improved compared to the prior art.

[0006] The object is achieved according to the invention by a parking lock device for a motor vehicle having the features of claim 1.

[0007] Advantageous embodiments of the invention are the subject of the dependent claims. A parking lock device for a motor vehicle comprises a housing, a first parking lock gear which is connected in a rotationally fixed manner to a transmission shaft, a first blocking element which is connected in a rotationally fixed manner to the housing, is arranged such that it can be axially displaced relative to the housing, and is designed to connect the first parking lock gear in a rotationally fixed manner to the housing, and a ramp plate which is rotatably arranged on the housing. A ramp mechanism is designed to convert a rotational movement of the ramp plate into an axial movement of the first blocking element. The ramp mechanism comprises a force introduction ramp which is connected to the ramp plate, in particular is connected in a rotationally fixed manner and axially fixed manner. Furthermore, the ramp mechanism comprises a force absorption ramp which is connected in a rotationally fixed manner and axially fixed manner to the first blocking element.

[0008] In a manner known per se, the force absorption ramp is arranged on an axial side of the ramp plate facing away from the first blocking element.

[0009] In particular, it is provided that the first blocking element is arranged axially between the first parking lock gear and the ramp plate.

[0010] According to the invention, the parking lock device has a second parking lock gear, which is connected in a rotationally fixed manner to a further transmission shaft arranged coaxially to the transmission shaft. According to the invention, the parking lock device also has a second blocking element, which is connected in a rotationally fixed manner to the housing, is arranged so as to be axially displaceable relative to the housing, and is designed to connect the second parking lock gear in a rotationally fixed manner to the housing. Furthermore, according to the invention, a further ramp mechanism is designed to convert a rotational movement of the ramp plate into an axial movement of the second blocking element, wherein the further ramp mechanism has a further force introduction ramp, which is connected to the ramp plate, in particular is connected in a rotationally fixed manner and axially fixed, and a further force absorption ramp, which is connected in a rotationally fixed manner and axially fixed to the second blocking element.

[0011] The same ramp plate is used for both ramp mechanisms.

[0012] In particular, it is provided that the second blocking element is arranged axially between the second parking lock gear and the ramp plate. The blocking elements are arranged, in particular, on opposite axial sides of the ramp plate. In the axial direction, in particular, the first parking lock gear, the first blocking element, the ramp plate, the second blocking element, and the second parking lock gear are arranged in this order. In the axial direction, in particular, the transmission shaft, the first parking lock gear, the first blocking element, the ramp plate, the second blocking element, the second parking lock gear, and the further transmission shaft are arranged in this order.

[0013] In particular, it is provided that the further force absorption ramp is arranged on an axial side of the ramp plate facing away from the second blocking element.

[0014] In one embodiment, the force introduction ramp is arranged on an axial side of the ramp plate facing away from the first blocking element.

[0015] In one embodiment, the force introduction ramp and the force absorption ramp are designed and arranged such that the force introduction ramp and the force absorption ramp slide onto one another by a rotational movement of the ramp plate in a parking lock deactivation direction, whereby an axial movement of the first blocking element away from the first parking lock gear and thereby a separation of an engagement of the first blocking element in the first parking lock gear takes place.

[0016] In one embodiment, the engagement of the first blocking element in the first parking lock gear is a rotationally fixed connection between the first blocking element and the first parking lock gear formed by a meshing engagement of a blocking toothing of the first blocking element in a parking lock gear toothing of the first parking lock gear.

[0017] The parking lock gear toothing is formed in particular on a side of the first parking lock gear facing the first blocking element, in particular the axial side, in particular in a circumferential edge region of this side of the first parking lock gear. The blocking toothing is formed in particular on a side of the first blocking element facing the first parking lock gear, in particular the axial side.

[0018] In one embodiment, the ramp mechanism is arranged radially outside the locking teeth of the first locking element. In one embodiment, the ramp plate has a through-opening through which a connecting element extends axially. This connecting element is designed to connect the force-absorbing ramp to the first locking element in a rotationally fixed and axially fixed manner. The force-absorbing ramp is connected to the first locking element in a rotationally fixed and axially fixed manner by means of the connecting element.

[0019] In one embodiment, the passage opening is arranged radially between the ramp mechanism on the one hand and the parking lock gear toothing and / or blocking toothing on the other hand, ie arranged radially between the ramp mechanism and the parking lock gear toothing and / or radially between the ramp mechanism and the blocking toothing.

[0020] In one embodiment, the parking lock device has a spring element acting in the axial direction, which is supported at one axial end on the housing and at its other axial end on the first blocking element.

[0021] In one embodiment, the spring element is arranged radially outside the ramp mechanism.

[0022] In one embodiment, the spring element is arranged axially overlapping the ramp mechanism.

[0023] In one embodiment, the spring element is designed and arranged in the axial direction between the housing and the first blocking element in such a way that the spring element is tensioned by the axial movement of the first blocking element away from the first parking lock gear, wherein a rotational movement of the ramp plate in a parking lock activation direction opposite to the parking lock deactivation direction, whereby the force introduction ramp and the force absorption ramp slide away from one another, an axial movement of the first blocking element in the direction of the first parking lock gear occurs due to the tensioned spring element, wherein the spring element is also designed and arranged in the axial direction between the housing and the first blocking element in such a way that it is still partially tensioned even when the first blocking element is fully engaged in the first parking lock gear.

[0024] In one embodiment, the spring element is designed as a helical spring and / or as a compression spring, in particular as a helical compression spring. In one embodiment, the spring element is arranged on a housing bolt of the housing, in particular wrapping around the housing bolt circumferentially, and the first blocking element has a bolt receiving formation with which it is arranged on the housing bolt so as to be axially displaceable along the housing bolt, wherein the spring element is supported at one axial end on the housing, in particular on a support formation of the housing, in particular the housing bolt, and at its other axial end on the bolt receiving formation of the first blocking element. The bolt receiving formation has in particular a through-opening for receiving the housing bolt.

[0025] In one embodiment, the parking lock device comprises an actuating device for driving the ramp plate to perform the rotational movement of the ramp plate. The actuating device is, for example, a mechanical, electromechanical, electrical, electromagnetic, pneumatic, or hydraulic actuating device, or another actuating device. For example, the actuating device comprises an electric adjusting motor with an adjusting pinion that meshes with an actuating toothing of the ramp plate. The actuating toothing is formed, for example, on an outer circumference of the ramp plate.

[0026] In one embodiment, the ramp mechanism has a plurality of force introduction ramps described above and / or a plurality of force absorption ramps described above. In particular, the number of force introduction ramps corresponds to the number of force absorption ramps, with each force introduction ramp being assigned its own force absorption ramp.

[0027] In one embodiment, a plurality of connecting elements described above are provided. In particular, a number of connecting elements corresponds to a number of force-absorbing ramps, with each connecting element being assigned its own force-absorbing ramp.

[0028] In one embodiment, a plurality of access openings as described above are provided in the ramp plate. In particular, a number of access openings corresponds to a number of connecting elements, with each access opening being assigned its own connecting element. In one embodiment, the parking lock device comprises a plurality of spring elements as described above.

[0029] In one embodiment, a plurality of the above-described housing bolts are provided. In one embodiment, a number of housing bolts corresponds to a number of spring elements, with each housing bolt being assigned its own spring element. For example, the housing bolts are distributed, in particular evenly distributed, around a circumference of the first blocking element.

[0030] In one embodiment, the first blocking element has a plurality of bolt-receiving formations as described above. In one embodiment, a number of bolt-receiving formations corresponds to a number of housing bolts, with each bolt-receiving formation being assigned a separate housing bolt. For example, the bolt-receiving formations are distributed, in particular evenly distributed, around the circumference of the first blocking element.

[0031] In one embodiment, the further force introduction ramp is arranged on an axial side of the ramp plate facing away from the second blocking element.

[0032] In one embodiment, the further force introduction ramp and the further force absorption ramp are designed and arranged such that the further force introduction ramp and the further force absorption ramp slide onto one another as a result of a rotational movement of the ramp plate in the parking lock deactivation direction, whereby an axial movement of the second blocking element away from the second parking lock gear occurs and thereby a separation of an engagement of the second blocking element with the second parking lock gear. The rotational movement in the parking lock deactivation direction is in particular the same rotational movement of the ramp plate, i.e. in the same direction of rotation, for effecting the axial movement of the first blocking element away from the first parking lock gear and for effecting the axial movement of the second blocking element away from the second parking lock gear. These axial movements occur in opposite axial directions, in particular towards one another.

[0033] In one embodiment, the engagement of the second blocking element in the second parking lock gear is a rotationally fixed connection between the second blocking element and the second parking lock gear formed by a meshing engagement of a further blocking toothing of the second blocking element in a further parking lock gear toothing of the second parking lock gear.

[0034] The additional parking lock gear toothing is formed in particular on a side of the second parking lock gear facing the second blocking element, in particular the axial side, in particular in a circumferential edge region of this side of the second parking lock gear. The additional locking toothing is formed in particular on a side of the second blocking element facing the second parking lock gear, in particular the axial side.

[0035] In one embodiment, the further ramp mechanism is arranged radially outside the further blocking teeth of the second blocking element.

[0036] In one embodiment, the ramp plate has a further through-opening through which a further connecting element axially extends, which is designed to connect the further force-absorbing ramp to the second blocking element in a rotationally fixed and axially fixed manner. The further force-absorbing ramp is connected to the second blocking element in a rotationally fixed and axially fixed manner by means of the further connecting element.

[0037] In one embodiment, the further access opening is arranged radially between the further ramp mechanism on the one hand and the further parking lock gear toothing and / or the further blocking toothing on the other hand, ie arranged radially between the further ramp mechanism and the further parking lock gear toothing and / or radially between the further ramp mechanism and the further blocking toothing.

[0038] In one embodiment, the parking lock device has a further spring element acting in the axial direction, which is supported at one axial end on the housing and at its other axial end on the second blocking element.

[0039] In one embodiment, the further spring element is arranged radially outside the further ramp mechanism.

[0040] In one embodiment, the further spring element is arranged axially overlapping the further ramp mechanism.In one embodiment, the further spring element is designed and arranged in the axial direction between the housing and the second blocking element in such a way that the axial movement of the second blocking element away from the second parking lock gear tensions the further spring element, wherein the rotational movement of the ramp plate in the parking lock activation direction opposite to the parking lock deactivation direction, whereby the further force introduction ramp and the further force absorption ramp slide away from one another, causes the second blocking element to move axially in the direction of the second parking lock gear by the tensioned further spring element, wherein the further spring element is also designed and arranged in the axial direction between the housing and the second blocking element in such a way that it is still partially tensioned even when the second blocking element is fully engaged in the second parking lock gear.The rotational movement in the parking lock activation direction is in particular the rotational movement of the ramp plate in the same direction of rotation for the sliding of the force introduction ramp from the force absorption ramp and for the sliding of the further force introduction ramp from the further force absorption ramp.

[0041] In one embodiment, the further spring element is designed as a helical spring and / or as a compression spring, in particular as a helical compression spring.

[0042] In one embodiment, the further spring element is arranged on a further housing bolt of the housing, in particular circumferentially wrapping around the further housing bolt, and the second blocking element has a further bolt receiving formation with which it is arranged on the further housing bolt so as to be axially displaceable along the further housing bolt, wherein the further spring element is supported at its one axial end on the housing, in particular on a further support formation of the housing, in particular the further housing bolt, and at its other axial end on the further bolt receiving formation of the second blocking element. The further bolt receiving formation has, in particular, a through-opening for receiving the further housing bolt.

[0043] In one embodiment, the additional ramp mechanism has a plurality of additional force introduction ramps described above and / or a plurality of additional force absorption ramps described above. In particular, the number of additional force introduction ramps corresponds to the number of additional force absorption ramps, with each additional force introduction ramp being assigned its own additional force absorption ramp. For example, a number of force introduction ramps corresponds to a number of additional force introduction ramps and / or a number of force absorption ramps corresponds to a number of additional force absorption ramps.

[0044] In one embodiment, a plurality of additional connecting elements as described above are provided. In particular, a number of additional connecting elements corresponds to a number of additional force-absorbing ramps, with each additional connecting element being assigned its own additional force-absorbing ramp.

[0045] In one embodiment, a plurality of additional access openings as described above are provided in the ramp plate. In particular, a number of additional access openings corresponds to a number of additional connecting elements, with each additional access opening being assigned its own additional connecting element.

[0046] In one embodiment, the parking lock device has a plurality of additional spring elements as described above.

[0047] In one embodiment, a plurality of additional housing bolts as described above are provided. In one embodiment, a number of additional housing bolts corresponds to a number of additional spring elements, with each additional housing bolt being assigned its own additional spring element. For example, the number of housing bolts corresponds to the number of additional housing bolts. For example, the additional housing bolts are distributed, in particular evenly distributed, around a circumference of the second blocking element. For example, the housing bolts and the additional housing bolts are arranged alternately in the circumferential direction of the first blocking element and the second blocking element.

[0048] In one embodiment, the second blocking element has a plurality of additional bolt receiving formations as described above. In one embodiment, a number of additional bolt receiving formations corresponds to a number of additional housing bolts, wherein each additional bolt receiving formation is assigned its own additional housing bolt. For example, the number of bolt receiving formations corresponds to the number of additional bolt receiving formations. For example, the additional bolt receiving formations are distributed around the circumference of the second blocking element, in particular evenly distributed. In the described solution, the activation of the parking lock, ieestablishing the engagement of the blocking toothing with the parking lock gear toothing and, if present, establishing the engagement of the further blocking toothing with the further parking lock gear toothing, by spring force of the at least one spring element and, if present, by spring force of the at least one further spring element.

[0049] This can ensure, in particular, that the engagement of the blocking toothing with the parking lock gear toothing and, if present, the engagement of the further blocking toothing with the further parking lock gear toothing is reliably established, because if the first parking lock gear is positioned in relation to the first blocking element or the second parking lock gear is positioned in relation to the second blocking element in such a way that the upper sides of the toothings rest on one another, then the at least one spring element or the at least one further spring element is still sufficiently tensioned to establish the engagement when the first parking lock gear or the second parking lock gear is moved further until the upper sides of the toothings no longer rest on one another.

[0050] In this case, the engagement of the blocking toothing with the parking lock gear toothing is established independently of the engagement of the further blocking toothing with the further parking lock gear toothing, since the first blocking element is moved axially by the at least one spring element and the second blocking element is moved axially independently thereof by the at least one further spring element.

[0051] Since at least one spring element and, if present, at least one additional spring element are still partially tensioned even after engagement, unintentional reversal of the engagement is prevented. Reversal of the engagement is thus only achieved by rotating the ramp plate in the parking lock deactivation direction.

[0052] The deactivation of the parking lock, ie the disengagement, takes place by means of the at least one force introduction ramp and force absorption ramp, ie by their sliding onto one another, and, if present, by means of the at least one further force introduction ramp and further force absorption ramp, ie by their sliding onto one another.

[0053] Advantageously, the parking lock device has two parking locks. The second parking lock is implemented by means of the common ramp plate and the respective additional component mentioned above. The actuation of both parking locks, in particular for locking both transmission shafts and thus in particular for locking two wheels of the motor vehicle, is carried out by means of the common, i.e., the same, ramp plate and thus in particular by means of the same actuating device for driving this ramp plate.

[0054] With the solution described, a parking lock for each of the two wheels, for example in the case of a dual drive of the motor vehicle, can be realized with only one actuating device.

[0055] In the described solution, the at least one spring element and, if present, the at least one further spring element are designed to engage the respective parking lock, i.e. to move the respective blocking element to the respective parking lock wheel, and the ramp mechanism and, if present, the further ramp mechanism are designed to disengage the respective parking lock, i.e. to move the respective blocking element against the spring force of the spring element or the further spring element away from the respective parking lock wheel.

[0056] The solution described is particularly cost-effective, space-saving and robust.

[0057] In the context of the present application, the term “rotatably fixed” means: Two rotatably mounted elements are connected to each other in a rotationally fixed manner if they are arranged coaxially to each other and are connected to each other in such a way that they rotate at the same angular velocity.

[0058] In the context of the present application, the terms "axial" and "radial" or "axial direction" and "radial direction", unless otherwise stated, refer to a direction of a main axis of rotation, namely the axis of rotation of the parking lock gears or the transmission shafts and the ramp plate, all of which are arranged coaxially to one another and coaxially to the blocking elements. A rotational axis of a shaft of the adjusting motor, on which in particular the adjusting pinion is arranged, is arranged in particular parallel and offset from the main axis of rotation. The expression that an element A is arranged on an "axial side" of an element C facing away from an element B means that, with regard to the axial direction, element A, element C, and element B are arranged one after the other in the order stated here. The "axial side" therefore means a side with regard to the axial direction.In the context of the present application, the term “radially overlapping” means that the components in question are arranged in a region of the same radial coordinates and, in particular, the same angular coordinates.

[0059] In the context of the present application, the term “axially overlapping” means that the components in question are arranged in a region of the same axial coordinates.

[0060] In the context of the present application, the term “radially outward of” means that one component is located in a region of larger radii than another component.

[0061] In the context of the present application, the term “radially within” means that one component is arranged in a region of smaller radii than another component.

[0062] In the context of the present application, the term "ramp plate" refers in particular to the plate to which the at least one or more force introduction ramps and, if present, the at least one or more additional force introduction ramps are permanently attached. The term "ramp plate" therefore does not encompass the at least one or more force introduction ramps and, if present, the at least one or more additional force introduction ramps, as these are arranged on the ramp plate.

[0063] The terms “comprehensive / comprising” are used in the sense of “comprising / indicating 1 used.

[0064] Embodiments of the invention are explained in more detail below with reference to drawings.

[0065] Showing:

[0066] Fig. 1 schematically shows a perspective view of an embodiment of a parking lock device for a motor vehicle,

[0067] Fig. 2 shows a schematic sectional view of the parking lock device from Fig. 1, Fig. 3A shows schematically flattened circumferential segments of a first parking lock wheel, a ramp plate and a first blocking element of the parking lock device from Fig. 1 in a non-assembled state,

[0068] Fig. 3B schematically shows the flattened circumferential segments from Figure 3A in an assembled state in the parking lock device,

[0069] Fig. 4A schematically flattened circumferential segments of a second parking lock wheel, the ramp plate and a second blocking element of the parking lock device from Figure 1 in a non-assembled state,

[0070] Fig. 4B schematically shows the flattened circumferential segments from Figure 4A in a mounted state in the parking lock device, and

[0071] Fig. 5 schematically shows a sectional view of another embodiment of the parking lock device, wherein the second blocking element, the second parking lock gear and other second components are not shown.

[0072] Corresponding parts are provided with the same reference numerals in all figures.

[0073] A parking lock device 1 for a motor vehicle is described below with reference to Figures 1 to 5. Figure 1 shows a perspective view and Figure 2 a sectional view of an embodiment of the parking lock device 1. Figures 3A and 3B show flattened circumferential segments of a first parking lock gear 2, a ramp plate 3 and a first blocking element 4 of this embodiment of the parking lock device 1 in a non-assembled state and in a mounted state in the parking lock device 1, respectively. Figures 4A and 4B show flattened circumferential segments of a second parking lock gear 5, the ramp plate 3 and a second blocking element 6 of this embodiment of the parking lock device 1 in a non-assembled state and in a mounted state in the parking lock device 1, respectively.Figure 5 shows a further embodiment of the parking lock device 1, wherein the second blocking element 6, the second parking lock gear 5 and other second components described below, which are shown in Figures 1 and 2, are not shown here. The parking lock device 1 comprises a housing 7. Furthermore, the parking lock device 1 comprises the first parking lock gear 2, which is connected in a rotationally fixed manner to a first transmission shaft 8, and in the examples shown also the second parking lock gear 5, which is connected in a rotationally fixed manner to a second transmission shaft (not shown) arranged coaxially to the first transmission shaft 8.

[0074] The parking lock device 1 further comprises the first blocking element 4, which is connected to the housing 7 in a rotationally fixed manner, is arranged axially displaceably relative to the housing 7, and is designed to connect the first parking lock gear 2 in a rotationally fixed manner to the housing 7. In the examples shown, the parking lock device 1 also comprises the second blocking element 6, which is connected to the housing 7 in a rotationally fixed manner, is arranged axially displaceably relative to the housing 7, and is designed to connect the second parking lock gear 5 in a rotationally fixed manner to the housing 7.

[0075] The parking lock device 1 further comprises the ramp plate 3, which is rotatably mounted on the housing 7. A first ramp mechanism 9 is configured to convert a rotational movement of the ramp plate 3 into an axial movement of the first blocking element 4. In the illustrated examples, a second ramp mechanism 10 is configured to convert a rotational movement of the ramp plate 3 into an axial movement of the second blocking element 6.

[0076] The first ramp mechanism 9 has first force introduction ramps 11, which are connected to the ramp plate 3, in particular, are connected in a rotationally fixed and axially fixed manner. Furthermore, the first ramp mechanism 9 has first force absorption ramps 12, which are connected in a rotationally fixed and axially fixed manner to the first blocking element 4. The number of first force introduction ramps 11 corresponds to the number of first force absorption ramps 12, with each first force introduction ramp 11 being assigned its own first force absorption ramp 12.

[0077] The second ramp mechanism 10 has second force introduction ramps 13, which are connected to the ramp plate 3, in particular, are connected in a rotationally fixed and axially fixed manner. Furthermore, the second ramp mechanism 10 has second force absorption ramps 14, which are connected in a rotationally fixed and axially fixed manner to the second blocking element 6. The number of second force introduction ramps 13 corresponds to the number of second force absorption ramps 14, with each second force introduction ramp 13 being assigned its own second force absorption ramp 14. The number of second force introduction ramps 13 corresponds in particular to the number of first force introduction ramps 11, and the number of second force absorption ramps 14 corresponds in particular to the number of first force absorption ramps 12.

[0078] The first force-absorbing ramps 12 are arranged on an axial side of the ramp plate 3 facing away from the first blocking element 4. The second force-absorbing ramps 14 are arranged on an axial side of the ramp plate 3 facing away from the second blocking element 6.

[0079] The first force introduction ramps 11 are arranged on an axial side of the ramp plate 3 facing away from the first blocking element 4. The second force introduction ramps 13 are arranged on an axial side of the ramp plate 3 facing away from the second blocking element 6.

[0080] The same ramp plate 3 is therefore used for both ramp mechanisms 9, 10.

[0081] The first blocking element 4 is arranged axially between the first parking lock gear 2 and the ramp plate 3. The second blocking element 6 is arranged axially between the second parking lock gear 5 and the ramp plate 3.

[0082] The blocking elements 4, 6 are arranged on opposite axial sides of the ramp plate 3. In the axial direction, the first transmission shaft 8, the first parking lock gear 2, the first blocking element 4, the ramp plate 3, the second blocking element 6, the second parking lock gear 5, and the second transmission shaft are arranged in this order, viewed from left to right in the illustrations according to Figures 1 and 2 and from right to left in the illustration according to Figure 5.

[0083] The first force introduction ramps 11 and the first force absorption ramps 12 are designed and arranged such that a respective first force introduction ramp 11 and a respective first force absorption ramp 12 slide onto one another by a rotational movement of the ramp plate 3 in a parking lock deactivation direction DR, whereby an axial movement of the first blocking element 4 away from the first parking lock gear 2 and thereby a separation of an engagement of the first blocking element 4 in the first parking lock gear 2 takes place.

[0084] The second force introduction ramps 13 and the second force absorption ramps 14 are designed and arranged such that a respective second force introduction ramp 13 and a respective second force absorption ramp 14 slide onto one another as a result of the rotational movement of the ramp plate 3 in the parking lock deactivation direction DR, whereby an axial movement of the second blocking element 6 away from the second parking lock gear 5 and thereby a separation of an engagement of the second blocking element 6 in the second parking lock gear 5 takes place.

[0085] The rotational movement in the parking lock deactivation direction DR is the same rotational movement of the ramp plate 3, i.e., in the same direction of rotation, for causing the axial movement of the first blocking element 4 away from the first parking lock gear 2 and for causing the axial movement of the second blocking element 6 away from the second parking lock gear 5. These axial movements occur in opposite axial directions, i.e., toward each other.

[0086] The engagement of the first blocking element 4 in the first parking lock gear 2 is a rotationally fixed connection between the first blocking element 4 and the first parking lock gear 2, formed by a meshing engagement of a first blocking toothing 15 of the first blocking element 4 in a first parking lock gear toothing 16 of the first parking lock gear 2. Likewise, the engagement of the second blocking element 6 in the second parking lock gear 5 is a rotationally fixed connection between the second blocking element 6 and the second parking lock gear 5, formed by a meshing engagement of a second blocking toothing 17 of the second blocking element 6 in a second parking lock gear toothing 18 of the second parking lock gear 5.

[0087] The first parking lock gear toothing 16 is formed in particular on an axial side of the first parking lock gear 2 facing the first blocking element 4, in particular in a circumferential edge region of this side of the first parking lock gear 2. The first blocking toothing 15 is formed in particular on an axial side of the first blocking element 4 facing the first parking lock gear 2.

[0088] The second parking lock gear toothing 18 is formed in particular on an axial side of the second parking lock gear 5 facing the second blocking element 6, in particular in a circumferential edge region of this side of the second parking lock gear 5. The second blocking toothing 17 is formed in particular on an axial side of the second blocking element 6 facing the second parking lock gear 5. In the illustrated embodiments, the first ramp mechanism 9 is arranged radially outside the first blocking toothing 15 of the first blocking element 4. In the illustrated embodiments, the second ramp mechanism 10 is arranged radially outside the second blocking toothing 17 of the second blocking element 6.

[0089] The ramp plate 3 has first through-openings 19 through which first connecting elements 20 axially extend, which are designed to connect the first force-absorbing ramps 12 in a rotationally fixed and axially fixed manner to the first blocking element 4. For example, each first force-absorbing ramp 12 is connected in a rotationally fixed and axially fixed manner to the first blocking element 4 via its own first connecting element 20, and each first connecting element 20 extends, for example, through its own first through-opening 19.

[0090] The ramp plate 3 further comprises second through-openings 21, through which second connecting elements 22 axially extend, which are designed to connect the second force-absorbing ramps 14 in a rotationally fixed and axially fixed manner to the second blocking element 6. For example, each second force-absorbing ramp 14 is connected in a rotationally fixed and axially fixed manner to the second blocking element 6 via its own second connecting element 22, and each second connecting element 22 extends, for example, through its own second through-opening 21.

[0091] In the illustrated embodiments, the first access openings 19 are arranged radially between the first ramp mechanism 9 on the one hand and the first parking lock gear toothing 16 and first blocking toothing 15 on the other hand.

[0092] In the illustrated embodiments, the second access openings 21 are arranged radially between the second ramp mechanism 10 on the one hand and the second parking lock gear toothing 18 and the second blocking toothing 17 on the other hand.

[0093] The parking lock device 1 further comprises first spring elements 23 acting in the axial direction, each of which is supported at one axial end on the housing 7 and at the other axial end on the first blocking element 4. In the examples shown, the parking lock device 1 also comprises second spring elements 24 acting in the axial direction, each of which is supported at one axial end on the housing 7 and at the other axial end on the second blocking element 6.

[0094] In the illustrated embodiments, the first spring elements 23 are arranged radially outside the first ramp mechanism 9 and, for example, also outside the second ramp mechanism 10. In the illustrated embodiments, the second spring elements 24 are arranged radially outside the second

[0095] Ramp mechanism 10 and, for example, also outside the first ramp mechanism 9.

[0096] In the illustrated embodiments, the first spring elements 23 are arranged axially overlapping the first ramp mechanism 9 and, for example, also the second ramp mechanism 10. In the illustrated embodiments, the second spring elements 24 are arranged axially overlapping the second ramp mechanism 10 and, for example, also the first ramp mechanism 9.

[0097] The first spring elements 23 are each designed and arranged in the axial direction between the housing 7 and the first blocking element 4 in such a way that the axial movement of the first blocking element 4 away from the first parking lock gear 2 tensions the first spring elements 23, wherein a rotational movement of the ramp plate 3 in a parking lock activation direction AR opposite to the parking lock deactivation direction DR, whereby the first force introduction ramps 11 and the first force absorption ramps 12 slide away from each other, an axial movement of the first blocking element 4 in the direction of the first parking lock gear 2 takes place by the tensioned first spring elements 23, wherein the first spring elements 23 are also each designed and arranged in the axial direction between the housing 7 and the first blocking element 4 in such a way,that they are still partially tensioned even when the first blocking element 4 is fully engaged in the first parking lock gear 2.

[0098] The second spring elements 24 are each designed and arranged in the axial direction between the housing 7 and the second blocking element 6 in such a way that the axial movement of the second blocking element 6 away from the second parking lock gear 5 tensions the second spring elements 24, wherein the rotational movement of the ramp plate 3 in the parking lock activation direction AR opposite to the parking lock deactivation direction DR, whereby the second force introduction ramps 13 and the second force absorption ramps 14 slide away from one another, an axial movement of the second blocking element 6 in the direction of the second parking lock gear 5 takes place due to the tensioned second spring elements 24, wherein the second spring elements 24 are also each designed and arranged in the axial direction between the housing 7 and the second blocking element 6 in such a way,that they are still partially tensioned even when the second blocking element 6 is fully engaged in the second parking lock gear 5.

[0099] The rotational movement in the parking lock activation direction AR is the rotational movement of the ramp plate 3 in the same direction of rotation for the sliding of the first force introduction ramps 11 from the first force absorption ramps 12 and for the sliding of the second force introduction ramp 13 from the second force absorption ramps 14.

[0100] In the illustrated embodiments, the first spring elements 23 and the second spring elements 24 are each designed as a helical compression spring.

[0101] In the illustrated embodiments, the first spring elements 23 are arranged on first housing bolts 25 of the housing 7, circumferentially wrapping around the respective first housing bolt 25, and the first blocking element 4 has first bolt receiving formations 26 with which it is arranged on the first housing bolt 25 so as to be axially displaceable along the first housing bolt 25, wherein the respective first spring element 23 is supported at one axial end on the housing 7, in particular on a first support formation 27 of the housing 7, in particular of the first housing bolt 25, and at its other axial end on the first bolt receiving formation 26 of the first blocking element 4.

[0102] The first bolt receiving formations 26 each have, in particular, a through-opening for receiving the respective first housing bolt 25.

[0103] In the illustrated embodiments, the second spring elements 24 are arranged on second housing bolts 28 of the housing 7, circumferentially wrapping around the respective second housing bolt 28, and the second blocking element 6 has second bolt receiving formations 29 with which it is arranged on the second housing bolt 28 so as to be axially displaceable along the second housing bolt 28, wherein the respective second spring element 24 is supported at one axial end on the housing 7, in particular on a second support formation 30 of the housing 7, in particular of the second housing bolt 28, and at its other axial end on the second bolt receiving formation 29 of the second blocking element 6.

[0104] The second bolt receiving formations 29 each have, in particular, a through-opening for receiving the respective second housing bolt 28.

[0105] The number of first housing bolts 25 corresponds in particular to the number of first spring elements 23, with each first housing bolt 25 being assigned its own first spring element 23. The first housing bolts 25 are positioned distributed, in particular evenly distributed, around a circumference of the first blocking element 4.

[0106] The number of second housing bolts 28 corresponds in particular to the number of second spring elements 24, with each second housing bolt 28 being assigned its own second spring element 24. The second housing bolts 28 are positioned distributed, in particular evenly distributed, around a circumference of the second blocking element 6.

[0107] The number of first housing bolts 25 corresponds in particular to the number of second housing bolts 28. The first housing bolts 25 and the second housing bolts 28 are arranged alternately in particular in the circumferential direction of the first blocking element 4 and the second blocking element 6.

[0108] A number of first bolt receiving formations 26 corresponds in particular to a number of first housing bolts 25, wherein each first bolt receiving formation 26 is assigned a separate first housing bolt 25. The first bolt receiving formations 26 are arranged distributed, in particular evenly distributed, around the circumference of the first blocking element 4.

[0109] A number of second bolt receiving formations 29 corresponds in particular to a number of second housing bolts 28, wherein each second bolt receiving formation 29 is assigned a separate second housing bolt 28. The second bolt receiving formations 29 are arranged distributed, in particular evenly distributed, around the circumference of the second blocking element 6.

[0110] The number of first bolt receiving formations 26 corresponds in particular to the number of second bolt receiving formations 29. The parking lock device 1 further comprises an actuating device 31 for driving the ramp plate 3 to carry out the rotational movement of the ramp plate 3. In the illustrated embodiments, the actuating device 31 is designed as an electromechanical actuating device 31. It comprises an electric adjusting motor 32 with an adjusting pinion 33, which meshes with an actuating toothing 34 of the ramp plate 3. In the illustrated embodiments, the actuating toothing 34 is formed on an outer circumference of the ramp plate 3.

[0111] In the described solution, the activation of the first parking lock and the second parking lock, i.e. the establishment of the engagement of the first blocking toothing 15 with the first parking lock gear toothing 16 and the establishment of the engagement of the second blocking toothing 17 with the second parking lock gear toothing 18, is carried out by the spring force of the first spring elements 23 and by the spring force of the second spring elements 24, respectively. This can ensure in particular that the engagement of the first blocking toothing 15 with the first parking lock gear toothing 16 and the engagement of the second blocking toothing 17 with the second parking lock gear toothing 18 is reliably established.

[0112] If the first parking lock gear 2 is positioned relative to the first blocking element 4 such that the upper sides of the first blocking toothing 15 and the first parking lock gear toothing 16 rest on one another, then the first spring elements 23 are still sufficiently tensioned to establish the engagement upon further movement of the first parking lock gear 2 until the upper sides of the first blocking toothing 15 and the first parking lock gear toothing 16 no longer rest on one another.

[0113] Likewise, when the second parking lock gear 5 is positioned relative to the second blocking element 6 such that the upper sides of the second blocking toothing 17 and the second parking lock gear toothing 18 rest on one another, the second spring elements 24 are still sufficiently tensioned to establish the engagement upon further movement of the second parking lock gear 5 until the upper sides of the second blocking toothing 17 and the second parking lock gear toothing 18 no longer rest on one another.

[0114] The engagement of the first locking toothing 15 with the first

[0115] Parking lock gear teeth 16 independent of the engagement of the second

[0116] Blocking teeth 17 are produced with the second parking lock gear teeth 18, since the first blocking element 4 is moved axially by the first spring elements 23 and the second blocking element 6 is moved axially independently by the second spring elements 24.

[0117] Since the first spring elements 23 and the second spring elements 24 are still partially tensioned even after the respective engagement has taken place, an unintentional cancellation of the respective engagement is prevented. The engagement can therefore only be canceled by rotating the ramp plate 3 in the parking lock deactivation direction DR.

[0118] The deactivation of the parking locks, ie the disengagement, takes place by means of the first force introduction ramps 11 and first force absorption ramps 12, ie by their sliding onto one another, and by means of the second force introduction ramp 13 and second force absorption ramps 14, ie by their sliding onto one another.

[0119] In the illustrated embodiments, the parking lock device 1 has two parking locks. The first parking lock is implemented by means of the common ramp plate 3 and the aforementioned first components, and the second parking lock is implemented by means of the common ramp plate 3 and the aforementioned second components. Both parking locks are actuated by means of the common, i.e., the same, ramp plate 3 and thus, in particular, by means of the same actuating device 31 for driving this ramp plate 3.

[0120] With the described solution, in particular a parking lock for two wheels of the motor vehicle, for example in the case of a dual drive of the motor vehicle, can be realized with only one actuating device 31.

[0121] In the described solution, the first spring elements 23 and the second spring elements 24 are designed to engage the respective parking lock, i.e., to move the respective blocking element 4, 6 toward the respective parking lock gear 2, 5, and the first ramp mechanism 9 and the second ramp mechanism 10 are designed to disengage the respective parking lock, i.e., to move the respective blocking element 4, 6 away from the respective parking lock gear 2, 5 against the spring force of the first spring elements 23 and the second spring elements 24, respectively. List of reference symbols

[0122] 1 parking lock device

[0123] 2 first parking lock gear

[0124] 3 Ramp plate

[0125] 4 first blocking element

[0126] 5 second parking lock gear

[0127] 6 second blocking element

[0128] 7 housings

[0129] 8 first gear shaft, gear shaft

[0130] 9 first ramp mechanism, ramp mechanism

[0131] 10 second ramp mechanism, further ramp mechanism

[0132] 11 first force introduction ramp, force introduction ramp

[0133] 12 first force absorption ramp, force absorption ramp

[0134] 13 second force introduction ramp, further force introduction ramp

[0135] 14 second force absorption ramp, further force absorption ramp

[0136] 15 first locking teeth, locking teeth

[0137] 16 first parking lock gear toothing, parking lock gear toothing

[0138] 17 second locking toothing, further locking toothing

[0139] 18 second parking lock gear toothing, further parking lock gear toothing

[0140] 19 first access opening, access opening

[0141] 20 first connecting element, connecting element

[0142] 21 second access opening, further access opening

[0143] 22 second connecting element, further connecting element

[0144] 23 first spring element, spring element

[0145] 24 second spring element, further spring element

[0146] 25 first housing bolt, housing bolt

[0147] 26 first bolt receiving formation, bolt receiving formation

[0148] 27 first support formation, support formation

[0149] 28 second housing bolt, further housing bolt

[0150] 29 second bolt receiving formation, further bolt receiving formation

[0151] 30 second support formation, further support formation

[0152] 31 Actuating device

[0153] 32 Adjustment motor

[0154] 33 adjusting pinion

[0155] 34 Actuating toothing AR Parking lock activation direction

[0156] DR parking lock deactivation direction

Claims

Mercedes-Benz Group AG Patent claims 1. Parking lock device (1) for a motor vehicle, comprising: - a housing (7), - a first parking lock gear (2) which is connected in a rotationally fixed manner to a transmission shaft (8), - a first blocking element (4) which is connected to the housing (7) in a rotationally fixed manner, is arranged to be axially displaceable relative to the housing (7) and is designed to connect the first parking lock gear (2) to the housing (7) in a rotationally fixed manner, and - a ramp plate (3) which is rotatably arranged on the housing (7), wherein a ramp mechanism (9) is designed to convert a rotational movement of the ramp plate (3) into an axial movement of the first blocking element (4), wherein the ramp mechanism (9) has a force introduction ramp (11) which is connected to the ramp plate (3), and a force absorption ramp (12) which is connected to the first blocking element (4) in a rotationally fixed and axially fixed manner, wherein the force absorption ramp (12) is arranged on an axial side of the ramp plate (3) facing away from the first blocking element (4), characterized by a second parking lock gear (5) which is connected in a rotationally fixed manner to a further transmission shaft arranged coaxially to the transmission shaft (8), and a second blocking element (6) which is connected in a rotationally fixed manner to the housing (7), is arranged so as to be axially displaceable relative to the housing (7) and is designed toto connect the second parking lock gear (5) to the housing (7) in a rotationally fixed manner, wherein a further ramp mechanism (10) is designed to convert a rotational movement of the ramp plate (3) into an axial movement of the second blocking element (6), wherein the further ramp mechanism (10) has a further force introduction ramp (13) which is connected to the ramp plate (3) and a further force absorption ramp (14) which is connected to the second blocking element (6) in a rotationally fixed and axially fixed manner.

2. Parking lock device (1) according to claim 1, characterized in that the force introduction ramp (11) is arranged on an axial side of the ramp plate (3) facing away from the first blocking element (4).

3. Parking lock device (1) according to one of the preceding claims, characterized in that the force introduction ramp (11) and the force absorption ramp (12) are designed and arranged such that the force introduction ramp (11) and the force absorption ramp (12) slide onto one another by a rotational movement of the ramp plate (3) in a parking lock deactivation direction (DR), whereby an axial movement of the first blocking element (4) away from the first parking lock gear (2) and thereby a separation of an engagement of the first blocking element (4) in the first parking lock gear (2) takes place.

4. Parking lock device (1) according to claim 3, characterized in that the engagement of the first blocking element (4) in the first parking lock gear (2) is a rotationally fixed connection between the first blocking element (4) and the first parking lock gear (2) formed by a meshing engagement of a blocking toothing (15) of the first blocking element (4) in a parking lock gear toothing (16) of the first parking lock gear (2).

5. Parking lock device (1) according to claim 4, characterized in that the ramp mechanism (9) is arranged radially outside the blocking teeth (15) of the first blocking element (4).

6. Parking lock device (1) according to one of the preceding claims, characterized in that the ramp plate (3) has a through-opening (19) through which a connecting element (20) extends axially, which is designed to connect the force-absorbing ramp (12) in a rotationally fixed and axially fixed manner to the first blocking element (4).

7. Parking lock device (1) according to claim 6, characterized in that the passage opening (19) is arranged radially between the ramp mechanism (9) on the one hand and the parking lock gear toothing (16) and / or blocking toothing (15) on the other hand.

8. Parking lock device (1) according to one of the preceding claims, characterized by a spring element (23) acting in the axial direction, which is supported at one axial end on the housing (7) and at its other axial end on the first blocking element (4).

9. Parking lock device (1) according to claim 8, characterized in that the spring element (23) is arranged radially outside the ramp mechanism (9).

10. Parking lock device (1) according to claim 8 or 9, characterized in that the spring element (23) is arranged axially overlapping the ramp mechanism (9).

11. Parking lock device (1) according to one of claims 8 to 10, characterized in that the spring element (23) is designed and arranged in the axial direction between the housing (7) and the first blocking element (4) in such a way that the axial movement of the first blocking element (4) away from the first parking lock gear (2) tensions the spring element (23), wherein a rotational movement of the ramp plate (3) in a parking lock activation direction (AR) opposite to the parking lock deactivation direction (DR), whereby the force introduction ramp (11) and the force absorption ramp (12) slide away from one another, an axial movement of the first blocking element (4) in the direction of the first parking lock gear (2) takes place by the tensioned spring element (23), wherein the spring element (23) is also designed and arranged in the axial direction between the Housing (7) and the first blocking element (4) is arranged such that it is still partially tensioned even when the first blocking element (4) is fully engaged in the first parking lock gear (2).

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