Parking lock device for vehicles and method for manufacturing parking lock device for vehicles

Abstract

The present invention relates to a parking lock device (10) for a vehicle (F), comprising: an impeller (1) connectable to a drive shaft (AW) of the vehicle (F); a housing (G) including a ratchet (3) and a side cover (SD) or the ratchet (3) and a retaining element (HM), wherein the ratchet (3) surrounds a free space inside the housing (G), wherein the ratchet (3) includes a stop (AN) extending radially inward into the free space, and wherein the impeller (1) is concentrically enclosed within the ratchet (3) relative to the drive shaft (AW) and in the... The blade region (2) is enclosed in the free space such that it extends between two azimuth-adjacent stops (AN) and between adjacent stops (AN); at least one damping device (4) is arranged between the blade region (2) and one of the stops (AN) in the azimuth intermediate region (ZB); and a locking pawl (SK) is provided to lock the rotational movement of the ratchet (3), wherein, when the ratchet (3) is locked, the transmission of torque from the stops (AN) to the blade region (2) can be absorbed at least partially by the damping device (4).

Description

Technical Field

[0001] The present invention relates to a parking lock device for a vehicle and a method for manufacturing a parking lock device for a vehicle. Background Technology

[0002] Common parking locks can be used in electric drive systems, such as tram axles, and advantageously achieve a locking effect against the vehicle's traveling or rolling motion and advantageously prevent the vehicle from rolling away unintentionally, or at least reduce the likelihood of it doing so.

[0003] The parking lock wheel can be fixedly connected to the drive shaft and runs along it once the motor of the E-Achse (E-axis) starts rotating. When the parking lock is triggered, an actuator generates rotational motion, which presses the pawl into the parking lock wheel via a switching mechanism. By engaging the pawl in the parking lock wheel, the drive shaft can be stopped abruptly through a form-fit. This means the E-motor of the E-Achse stops within milliseconds. A very large torque is present here. It is desirable to smooth and dampen the sudden stop and the associated large torque.

[0004] The parking lock wheel is fixedly connected to the drive shaft and operates along that shaft once the E-motor of the E-axle starts rotating. When the parking lock is triggered, the entire E-axle can stop within a fraction of a second, with a huge torque impacting the drive shaft, transmission shaft and its bearings, parking lock wheel, pawl, and housing. Therefore, these components, as well as the ball bearings and housing, must be implemented with extreme robustness. More robust components mean higher cost and a heavier and larger E-axle.

[0005] WO 2019 / 020252 A1 describes a device for locking transmission, the transmission having at least one shaft and at least one locking wheel coaxially arranged on the shaft. Summary of the Invention

[0006] The present invention provides a parking lock device for a vehicle according to the present invention and a method for manufacturing a parking lock device for a vehicle according to the present invention.

[0007] Preferred improvements are the subject of this invention.

[0008] The advantage of this invention, based on the concept of providing a parking lock device for a vehicle and a method for manufacturing a parking lock device for a vehicle, wherein the transmission of locking torque to the components of the parking lock device can be damped and a lower cost, lighter and more compact parking lock device and electric drive device can be obtained, wherein the parking lock device can be installed in such electric drive device, for example, in an electric drive axle.

[0009] According to the present invention, a parking lock device for a vehicle includes an impeller connectable to a drive shaft of the vehicle, wherein the impeller includes a radial outer periphery and at least one blade region extending outward from the radial outer periphery of the impeller; a housing including a ratchet and side covers or a ratchet and retaining elements, wherein the side covers respectively cover the ratchet from a lateral side and are rotatably fixed to the drive shaft, or the retaining elements respectively rotatably fix the ratchet to the drive shaft or the impeller (1) from a lateral side, wherein the ratchet surrounds a free space inside the housing. The ratchet includes a radially outer side having a protrusion and a recess therebetween, and a radially inner side having a stop extending radially inward into the free space. The impeller is concentrically enclosed within the ratchet and within the free space relative to the drive shaft, such that the blade region extends between two azimuthally adjacent stops into an azimuth mid-region between adjacent stops. For example, the ratchet can be axially fixed relative to the impeller by the retaining element. The parking lock device also includes at least one damping device arranged between the blade region and one of the stops in the azimuth mid-region; and a locking pawl capable of engaging one of the recesses and locking the rotational movement of the ratchet, wherein, when the ratchet is locked, the torque transmission from the stops to the blade region can be at least partially absorbed by the damping device.

[0010] Parking locks can be used in electric drive axles to prevent electric vehicles from rolling away unintentionally, or at least to reduce the danger.

[0011] The impeller can be connected to the drive shaft in a way that resists relative rotation. A retaining element can fix a specific area of ​​the ratchet to the impeller. The ratchet and impeller can be advantageously arranged in the same axial position along the drive shaft. Here, the direction transverse to the ratchet and impeller can correspond to the direction along the drive axle (shaft), which can be perpendicular to the impeller, for example, extending in two directions away from the impeller. In the impeller's stationary position, the impeller can have a constant position relative to the ratchet. Here, the blade area can be positioned in the azimuth mid-region between adjacent stops, such that one of the damping devices can be arranged between the blade area and the respective adjacent stops, preferably the same damping device with the same size azimuth mid-region (or alternatively, different damping devices and different sizes of mid-regions). In the open state, i.e., when there is no locking action, the ratchet can rotate concentrically and at the same rotational speed with the impeller. This can be achieved by pushing the ratchet through the blade area and via the damping device, i.e., torque continues to be supplied to the ratchet with almost no damping.

[0012] When the locking action is triggered, i.e., when the locking pawl is fixed and engaged, and when the ratchet is locked, the impeller can move until the next damping device, or it may already be against the damping device in a stationary position. The stop portion is against the damping device and clamps the damping device between the blade area and the stop portion, and preferably elastically deforms upon further rotation. Thus, the sudden locking effect of the locking torque and the rotational motion of the ratchet on the impeller can be damped.

[0013] By using a parking lock wheel with a damping device to reduce rotation, huge torques can be damped and thus the components can withstand smaller loads.

[0014] If a component must withstand a smaller torque, then the component does not need to be as robust. This results in the advantage that the component can be manufactured at a lower cost, and the housing, shaft, bearing, and axle can be manufactured in a more compact and advantageous structural manner.

[0015] The entire assembly can be held together with screws and nuts, for example, between the side cover and the ratchet. The retaining element can fix the ratchet axially relative to the impeller, but allows rotation about the impeller with the drive shaft as the axis of rotation, for example when the stop is movably positioned on the radially outer region of the impeller.

[0016] According to a preferred embodiment of the parking lock device, the damping device includes a rubber element having a cylindrical or spherical shape.

[0017] The rubber element can be adapted in size and shape to the intermediate area and can be advantageously elastically deformed when the blade area is pressed against the stop.

[0018] Here, the rubber element can be designed variably in shape and (Shore) hardness, for example, as a sphere or cylinder. When molding the rubber dampers, it is important that they only slightly contact the impeller and housing wheel. In the case of a cylinder, this is linear contact; in the case of a sphere, it is point contact. The contact area only increases with increasing compression of the rubber element. Thus, damping is increased with increasing compression. During operation, the damping device (in this case, the rubber element) advantageously holds the impeller in the middle, thus providing two equally large intermediate zones in which the rubber element can be inserted. This is important because it ensures functionality during forward and backward movement. If the parking lock is triggered, the pawl engages the ratchet. The ratchet begins to rotate relative to the still stationary impeller. Here, the ratchet presses the rubber element against the impeller. The rubber damper is elastically compressed, thus producing a damping effect. Due to this damping principle, the torque is no longer fully delivered to the impeller and drive shaft, as the rubber element absorbs a portion. This means that the drive shaft, as well as the transmission shaft and its bearings and housing, no longer need to be designed so robustly. Once the pawl opens again, the expanding rubber element presses the impeller back into its initial position.

[0019] According to a preferred embodiment of the parking lock device, the damping device includes a spring element.

[0020] The spring element can be made of metal, fixed to the stop, and extends into at least one of the adjacent intermediate regions. Therefore, multiple spring elements or other damping devices can be arranged in combination during circulation around the impeller.

[0021] According to a preferred embodiment of the parking lock device, the spring element includes a retainer, from which one or two springs extend, and the retainer is capable of being positioned on the stop, and one spring extends into one of the intermediate azimuth regions or each spring extends into the other intermediate azimuth region, wherein the retainer includes a retaining element.

[0022] The spring element can be advantageously, simply, and quickly fastened to the stop by means of a retainer.

[0023] The parking lock wheel may include four spring elements. These spring elements may be manufactured from spring steel using a sheet metal stamping and bending method. The retainer may include a locking tongue and two metal tabs, wherein the locking tongue may be positioned on one side of the stop, and the metal tabs may then be bent around the stop and then surround and clamp the stop on its opposite sides. The spring elements may be designed with slight variations in shape and wall thickness. Two of the four spring elements may be pushed through the opposite stops of the ratchet, and the metal tabs are plastically pressed around the stops, so that the two spring elements can be secured to the ratchet. The impeller is then placed in the center of the ratchet. The assembly is then rotated 180°, assembling the remaining two spring elements and pressing them together with the ratchet shape and force through the metal tabs. Due to the locking tongue, the ratchet can no longer be pushed axially relative to the impeller after assembly; it can extend radially locally on the stop and on the impeller (its radially inner region). Therefore, the locking pawl can act as a retaining element. During operation, the spring holds the impeller in the center, creating two equally sized cavities as azimuth mid-range regions in the stationary position. These two mid-range regions with spring elements ensure this function during forward and backward movement. When locking begins, the ratchet presses the spring relative to the impeller. The spring is elastically compressed, resulting in damping. Due to this damping principle, torque is no longer fully delivered to the impeller and drive shaft, as the spring absorbs a portion. Once the ratchet opens again, the expanding spring presses the impeller back into its initial position.

[0024] According to a preferred embodiment of the parking lock device, the damping device includes oil that can be filled into the intermediate region of the azimuth angle.

[0025] The oil may be hydraulic oil, which may have high incompressibility.

[0026] According to a preferred embodiment of the parking lock device, there is an intermediate space between the radially inner side of the ratchet and the radially upper side of the blade region, through which oil can be pressed from the intermediate region of the first azimuth angle to the adjacent intermediate region of the second azimuth angle, wherein the intermediate region of the first azimuth angle and the intermediate region of the second azimuth angle abut against the opposite sides of the blade region.

[0027] Therefore, when oil is squeezed out from the blade region and pressed through the intermediate space into another intermediate region adjacent to the blade region, damping between the blade region and the adjacent stop can be obtained at the start of the locking action.

[0028] According to a preferred embodiment of the parking lock device, oil completely fills the free space inside the housing.

[0029] This complete filling improves the pressure build-up when the locking action begins in free space and allows for the effective use of incompressible action.

[0030] The entire cavity between the ratchet and the impeller can be filled with hydraulic oil. Furthermore, an intermediate spring can be inserted into the free space, at least one of which extends into the intermediate region adjacent to the blade area. Through the intermediate spring, the impeller can be centered in a static position between two adjacent stops, thus creating two equally sized intermediate regions filled with hydraulic oil. These two intermediate regions ensure damping during locking for forward and backward movement. If the parking lock is triggered, the pawl engages the ratchet. The ratchet begins to rotate relative to the still-stationary impeller. Here, the hydraulic oil can be squeezed through the narrow section (intermediate space) like a shock absorber. The intermediate spring can be simultaneously elastically compressed by the movement of the stops. Due to this damping principle, torque is no longer fully delivered to the impeller and drive shaft. Once the pawl reopens, the impeller can be re-centered by one or more intermediate springs and thus returned to its initial position.

[0031] According to a preferred embodiment of the parking lock device, each side cover includes two sealing rings that are inserted into the side cover and form a seal in the free space within the housing between the corresponding side cover and the ratchet. The sealing rings prevent oil from escaping from the housing and prevent liquid from seeping in from the outside.

[0032] According to a preferred embodiment of the parking lock device, the parking lock device includes at least two damping devices, wherein a first damping device is arranged between a first stop portion in the blade region and a first azimuth angle intermediate region, and a second damping device is arranged between a second stop portion in the blade region and a second azimuth angle intermediate region, wherein the first azimuth angle intermediate region and the second azimuth angle intermediate region abut against opposite sides of the blade region.

[0033] By using two damping devices around the blade area, damping can be advantageously applied to both directions of rotation (forward and backward).

[0034] According to the present invention, in a method for manufacturing a parking lock device for a vehicle, an impeller is provided, the impeller being connectable to a drive shaft of the vehicle, wherein the impeller includes a radial outer periphery and at least one blade region extending radially outward from the radial outer periphery of the impeller. Furthermore, a ratchet and side cover or a ratchet and retaining element are provided, wherein the side cover covers the ratchet from a lateral side and is rotatably fixed to the drive shaft, or the retaining element rotatably fixes the ratchet to the drive shaft or the impeller from a lateral side, wherein the ratchet forms a housing and surrounds a free space inside the housing, wherein the ratchet includes a radially outer side having a protrusion and a recess between the radially outer sides, and includes a radially inner side having a stop portion extending radially inward into the free space, and wherein the impeller is concentrically enclosed in the ratchet relative to the drive shaft and in the free space, such that the blade region extends between two azimuthally adjacent stops into an azimuthally intermediate region between adjacent stops, wherein the ratchet can be axially fixed relative to the impeller by the retaining element. Furthermore, at least one damping device is arranged between one of the stops in the blade region and the intermediate azimuth region; and a locking pawl is provided, which can engage with one of the recesses and lock the rotational movement of the ratchet, wherein, in the case of locking the ratchet, the transmission of torque from the blade region to the stop can be at least partially absorbed by the damping device.

[0035] According to a preferred embodiment of the method, the at least one damping device includes a spring element and a retainer with a metal tab. The at least one damping device is arranged such that the metal tab is plastically compressed around the stop, such that the spring element is fastened to the ratchet in such a way that one or two springs extend away from the stop, and the spring extends into one of the intermediate azimuth regions or each spring extends into the other intermediate azimuth region respectively. Furthermore, after the impeller is inserted into the free space of the ratchet, the retainer is bent around the impeller from the axial side in such a way that the retainer axially fixes the impeller.

[0036] Parking locking devices can also be highlighted by combining the features and advantages mentioned in the method, and vice versa.

[0037] Other features and advantages of embodiments of the present invention will become apparent from the following description with reference to the accompanying drawings. Attached Figure Description

[0038] The invention will now be described in more detail with reference to the embodiments shown in the accompanying drawings.

[0039] Figure 1 A schematic diagram of a parking locking device in a stationary position is shown according to an embodiment of the present invention, which has a damping device;

[0040] Figure 2 A schematic diagram of a ratchet and impeller in a stationary position is shown according to an embodiment of the present invention, which has a damping device;

[0041] Figure 3 A schematic diagram of a parking locking device in a locking position is shown according to an embodiment of the present invention, which has a damping device;

[0042] Figure 4a -c shows schematic diagrams of the damping device according to an embodiment of the present invention;

[0043] Figure 5a b. According to another embodiment of the present invention, a schematic diagram of a parking locking device in a stationary position and in a locking position is shown, which has a damping device;

[0044] Figure 6a Figures b and c show schematic diagrams of the housing of the parking locking device according to another embodiment of the present invention;

[0045] Figure 7a b. According to another embodiment of the present invention, a schematic diagram of a parking locking device in a stationary position and in a locking position is shown, which has a damping device;

[0046] Figure 8 A schematic diagram of a parking locking device in a stationary position is shown according to another embodiment of the present invention, which has a damping device;

[0047] Figure 9 A block diagram of method steps for manufacturing a parking locking device is shown according to an embodiment of the present invention.

[0048] In the accompanying drawings, the same reference numerals denote the same or functionally identical elements. Detailed Implementation

[0049] Figure 1 A schematic diagram of a parking lock device with a damping mechanism in a stationary position is shown according to an embodiment of the present invention.

[0050] The parking lock device 10 for vehicle F includes: an impeller 1, which is connectable to the drive shaft AW of vehicle F, wherein the impeller 1 includes a radially outer periphery AU and at least one blade region 2 extending radially outward from the radially outer periphery AU of the impeller 1; and a housing G including a ratchet 3 and a retaining element HM, wherein the retaining element HM rotatably fixes the ratchet 3 to the drive shaft AW from a lateral side, wherein the ratchet 3 surrounds a free space inside the housing G, wherein the ratchet 3 includes a radially outer side AS and a radially inner side INS, the radially outer side having a protrusion EH and a recess VT, and the radially inner side having a stop AN, wherein the stop AN extends radially inward into the free space, and wherein the impeller 1 is positioned relative to the drive shaft A. W is concentrically inserted into the ratchet 3 and enclosed in free space, such that the blade region 2 extends from two azimuthally adjacent stops AN to the azimuth intermediate region ZB between the adjacent stops AN, wherein the ratchet 3 can be axially fixed relative to the impeller 1 by a retaining element HM; at least one damping device 4 is arranged between the blade region 2 and one of the stops AN in the azimuth intermediate region ZB; and a locking pawl SK, which can be engaged, for example, by an actuator, into one of the recesses VT, and the rotational movement of the ratchet 3 can be locked by the locking pawl, wherein, when the ratchet 3 is locked, the transmission of torque from the stops AN to the blade region 2 can be at least partially absorbed by the damping device 4.

[0051] The damping device 4 may include a plurality of spring elements FE, wherein such spring element FE may include a retainer HE, two springs extend from the retainer HE and the retainer HE may be disposed on the stop portion AN, and one spring may extend into the first azimuth intermediate region ZB1 and the second spring may extend into the second azimuth intermediate region ZB2, wherein the retainer HE may include a retainer element HM.

[0052] Figure 2 A schematic diagram of a ratchet and impeller with a damping device in a stationary position is shown according to an embodiment of the present invention.

[0053] In a stationary position, the impeller can run in conjunction with the drive axle (shaft) AW and can also rotate the ratchet 3.

[0054] Two damping devices 4, serving as spring elements, can be arranged on a stop portion. A first damping device 4a is disposed in a first azimuth intermediate region ZB1 between the blade region 2 and the first stop portion AN1, and a second damping device 4b is disposed in a second azimuth intermediate region ZB2 between the blade region 2 and the second stop portion AN2. The first azimuth intermediate region ZB1 and the second azimuth intermediate region ZB2 can abut against opposite sides of the same blade region 2. In a stationary position, the first azimuth intermediate region ZB1 and the second azimuth intermediate region ZB2 can be of the same size, and the spring element can be free from compression.

[0055] These spring elements FE can be manufactured from spring steel using a sheet metal stamping and bending method. Here, the retainer HE can include a locking tongue ZG and two metal tabs MT, wherein, on a stop portion, the locking tongue ZG can be positioned on one side of the stop portion AN, and the metal tabs MT can then be bent around the stop portion and then surround and clamp the stop portion on the opposite side. Here, the spring element FE can be designed with slight variations in shape and wall thickness. Two of the four spring elements can be pushed over the opposite stop portions AN on the ratchet 3, and the metal tabs MT are plastically compressed around the stop portions, so that the two spring elements can be fastened to the ratchet. The impeller is then placed in the middle of the ratchet. The structural assembly is then rotated 180°, and the remaining two spring elements are assembled and pressed together by the metal tabs in a shape-fitting and force-fitting manner with the ratchet.

[0056] Figure 3 A schematic diagram of a parking lock device with a damping mechanism in a locking position is shown according to an embodiment of the present invention.

[0057] In the locked position, the locking pawl SK engages between the two protrusions EH of the ratchet 3, triggered by the actuator. The impeller with blade region 2 can then rotate slightly further, wherein the blade region can press the first spring element FE (first spring) together and unload the second spring FE2. Figure 3 This is symbolically shown in the way that the blade area is close to the stop closest in the direction of rotation and squeezes the spring FE1 located therein together.

[0058] Figure 4a -c shows schematic diagrams of damping devices according to an embodiment of the present invention.

[0059] Figure 4a , 4b 4c shows different perspective views of the spring element FE.

[0060] The spring element FE may each include two springs FE1 and FE2, which may be integrally formed with the retainer HE and, when installed in the intermediate region, may extend away from the retainer HE using a bending region. The two springs FE1 and FE2 may be manufactured from spring steel using a sheet metal stamping and bending method. Here, the retainer HE may include a locking tongue ZG (…). Figure 4c ) and two metal contacts MT ( Figure 4a and Figure 4b In this configuration, a locking tongue ZG can be positioned on one side of a stop, and a metal contact MT can then be bent around the stop and clamp it against the opposite side of the stop. Here, the spring element FE can be designed with slight variations in shape and wall thickness. Two of the four spring elements can be pushed past the opposite stops of the ratchet, and the metal contact MT is plastically compressed around the stop, allowing the two spring elements to be secured to the ratchet.

[0061] Figure 5a and 5b According to another embodiment of the present invention, a schematic diagram of a parking locking device with a damping device in a stationary position and in a locking position is shown.

[0062] The parking lock device 10 shown can be installed in the aforementioned drive unit, such as an electric drive axle, and includes multiple rubber elements 4 as damping devices 4, such as spherical or cylindrical, wherein, Figure 5a The static pose is shown, in which the rubber element 4 is arranged in the azimuth intermediate region ZB, and these azimuth intermediate regions ZB can be of the same size. Figure 5b This illustrates the locking position when the locking pawl SK engages in the ratchet 3. Then, the impeller 2 can be twisted and press against the rubber element 4 in the direction of rotation, damping the torque of the ratchet.

[0063] The housing may include a ratchet 3 and a side cover, the side cover being fastened to the ratchet 3 by a screw SR.

[0064] Figure 6a , 6b Figure 6c shows a schematic diagram of the housing of the parking locking device according to another embodiment of the present invention.

[0065] The housing G may include a ratchet 3 and a side cover SD, wherein the side cover SD may cover the ratchet 3 from the lateral side. Figure 6a and Figure 6bIt can be rotatably fixed to the drive shaft AW. The side cover SD can be fastened to the ratchet 3 by screws SR. In this case, rotatability means that the ratchet 3 does not move radially relative to the drive shaft. However, the ratchet 3 is not connected to the drive shaft in a way that resists relative rotation, but can be rotated at a different speed than the drive shaft. Figure 6c A view perpendicular to the axial direction is shown, illustrating how the screw SR securely connects the ratchet 3 to the side cover SD, and how the screw can also be held in place by the nut M. The inner region can be advantageously sealed relative to the outer region using a radially surrounding sealing ring DR. The sealing ring DR can be located radially inside and outside the position of the screw SR.

[0066] Figure 7a -b According to another embodiment of the present invention, a schematic diagram of a parking locking device with a damping device in a stationary position and in a locking position is shown.

[0067] In this case, the damping device 4 is shown as a rubber element, which is based on... Figure 7a It can be spherical and according to Figure 7b It can be cylindrical.

[0068] The first damping device 4a can be arranged in the first azimuth intermediate region ZB1 between the blade region 2 and the first stop, and the second damping device 4b can be arranged in the second azimuth intermediate region ZB2 between the blade region 2 and the second stop, wherein the first azimuth intermediate region ZB1 and the second azimuth intermediate region ZB2 can be attached to the opposite sides of the blade region 2.

[0069] Figure 8 A schematic diagram of a parking lock device with a damping device in a stationary position is shown according to another embodiment of the present invention.

[0070] The damping device 4 may also include oil 5, which can be filled into the azimuth intermediate region ZB. Here, an intermediate space 6 may exist between the radially inner side INS of the ratchet 3 and the radially upper side OS of the blade region 2, through which oil 5 can be pressed from the first azimuth intermediate region ZB1 into the adjacent second azimuth intermediate region ZB2, wherein the first azimuth intermediate region ZB1 and the second azimuth intermediate region ZB2 abut against the opposite sides of the blade region 2. Oil 5 can completely fill the free space inside the housing G. Screws SR can secure the side cover (not shown) to the ratchet, advantageously on both lateral sides, and seal the interior of the housing.

[0071] Furthermore, an intermediate spring ZF can be inserted into the free space; at least one intermediate spring can extend into the intermediate regions ZB1 and ZB2 adjacent to the blade region. Through the intermediate spring ZF, the blade region 2 can be centrally held in a static position between two adjacent stops AN, thus obtaining two equally sized intermediate regions filled with hydraulic oil.

[0072] Figure 9 A block diagram of method steps for manufacturing a parking locking device is shown according to an embodiment of the present invention.

[0073] In the method, an S1 impeller is provided, which is connectable to the drive shaft of a vehicle. The impeller includes a radially outer periphery and at least one blade region extending radially outward from the radially outer periphery of the impeller. An S2 ratchet and side cover or a ratchet and retaining element is provided, wherein the side cover covers the ratchet from a lateral side and rotatably secures it to the drive shaft, or the retaining element rotatably secures the ratchet to the drive shaft from a lateral side. The ratchet forms a housing and surrounds a free space inside the housing. The ratchet includes a radially outer side having a protrusion and a recess therebetween and a radially inner side having a stop portion extending radially inward into the free space. The impeller is... The drive shaft is concentrically enclosed within the ratchet and within the free space, such that the blade region extends between two azimuthally adjacent stops into an azimuth mid-region between the adjacent stops, wherein the ratchet can be axially fixed relative to the impeller via the retaining element; and at least one damping device is arranged S3 between the blade region and one of the stops in the azimuth mid-region, and a locking pawl S4 is provided, which can engage in one of the recesses and lock the rotational movement of the ratchet, wherein, in the case of locking the ratchet, the transmission of torque from the stops to the blade region can be at least partially absorbed by the damping device.

[0074] Although the present invention has been fully described above with reference to preferred embodiments, the present invention is not limited thereto, but can be modified in various ways and methods.

Claims

1. A parking lock device (10) for a vehicle (F), comprising: - a vane wheel (1), which can be connected to a drive shaft (AW) of the vehicle (F), wherein the vane wheel (1) comprises a radial outer circumference (AU) and at least one vane region (2), which extends radially outward from the radial outer circumference (AU) of the vane wheel (1); - a housing (G), which comprises a ratchet wheel (3) and a side cover (SD) or the ratchet wheel (3) and a holding element (HM), wherein the side cover (SD) respectively covers the ratchet wheel (3) from the lateral side and is fixed rotatably on the drive shaft (AW) or the holding element (HM) respectively fixes the ratchet wheel (3) rotatably from the lateral side on the drive shaft (AW) or the vane wheel (1), wherein the ratchet wheel (3) encloses a free space in the interior of the housing (G), wherein the ratchet wheel (3) comprises a radial outer side (AS) with protrusions (EH) and recesses (VT) therebetween and a radial inner side (INS) with a stop (AN), wherein the stop (AN) extends radially inward into the free space, and wherein the vane wheel (1) is enclosed concentrically with respect to the drive shaft (AW) into the ratchet wheel (3) and in the free space, so that the vane region (2) extends between two stop (AN) adjacent to each other in the azimuth angle into an azimuth angle intermediate region (ZB) between adjacent stops (AN); - at least one damping device (4), which is arranged between the vane region (2) and one of the stops (AN) in the azimuth angle intermediate region (ZB), wherein the damping device (4) comprises a spring element (FE), wherein the spring element (FE) comprises a holder (HE), from which one spring or two springs extend away, and the holder (HE) can be placed on the stop (AN) and the one spring extends into the azimuth angle intermediate region (ZB) or each spring extends into another azimuth angle intermediate region (ZB), and wherein the holder (HE) comprises the holding element (HM); and - a locking pawl (SK), which can be latched into one of the recesses (VT) and by which a rotational movement of the ratchet wheel (3) can be locked, wherein, in the case of a ratchet wheel (3) lock, the transmission of a torque from the stop (AN) onto the vane region (2) can be at least partially absorbed by the damping device (4).

2. The parking lock device (10) according to claim 1, wherein The damping device (4) comprises a rubber element, which has a cylindrical shape or a spherical shape.

3. The parking lock device (10) according to claim 1 or 2, wherein The damping device (4) comprises an oil (5), which can be filled into the azimuth angle intermediate region (ZB).

4. The parking lock device (10) according to claim 3, wherein An intermediate space (6) exists between the radially inner side (INS) of the ratchet wheel (3) and the radially upper side (OS) of the vane region (2), through which the oil (5) can be pressed from a first azimuthal intermediate region (ZB1) into an adjacent second azimuthal intermediate region (ZB2), wherein the first and second azimuthal intermediate regions (ZB1, ZB2) abut on opposite sides of the vane region (2).

5. The parking lock device (10) according to claim 3, wherein The oil (5) completely fills the free space inside the housing (G).

6. The parking lock device (10) according to claim 3, wherein Each side cover (SD) comprises two sealing rings (DR) which are inserted into the side cover (SD) and seal the free space inside the housing (G) between the corresponding side cover (SD) and the ratchet wheel (3).

7. The parking lock device (10) according to claim 1 or 2, comprising at least two damping devices (4), wherein A first damping device (4a) is arranged between the vane region (2) and a first stop (AN1) in a first azimuthal intermediate region (ZB1), and a second damping device (4b) is arranged between the vane region (2) and a second stop (AN2) in a second azimuthal intermediate region (ZB2), wherein the first and second azimuthal intermediate regions (ZB1, ZB2) abut on opposite sides of the vane region (2).

8. A method for manufacturing a parking lock device (10) for a vehicle (F), comprising the following steps: - providing an impeller (1) which can be connected to a drive shaft (AW) of a vehicle (F), wherein the impeller (1) comprises a radially outer circumference (AU) and at least one vane region (2) which extends radially outward from the radially outer circumference (AU) of the impeller (1); - providing a ratchet wheel (3) and a side cover (SD) or a ratchet wheel (3) and a holding element (HM), wherein the side cover (SD) respectively covers the ratchet wheel (3) from the lateral side and is fixed rotatably on the drive shaft (AW), or the holding element (HM) respectively fixes the ratchet wheel (3) rotatably on the drive shaft (AW) or on the impeller (1) from the lateral side, wherein the ratchet wheel (3) forms a housing (G) and encloses a free space inside the housing (G), wherein the ratchet wheel (3) comprises a radially outer side (AS) with protrusions (EH) and recesses (VT) therebetween and a radially inner side (INS) with stops (AN), wherein the stops (AN) extend radially inward into the free space, and wherein the impeller (1) is enclosed concentrically with respect to the drive shaft (AW) in the ratchet wheel (3) and in the free space, so that the vane region (2) extends between two stops (AN) adjacent to each other in azimuth and into an azimuthal intermediate region (ZB) between adjacent stops (AN), wherein the ratchet wheel (3) can be fixed axially with respect to the impeller (1) by means of the holding element (HM); - at least one damping device (4) is arranged between one of the stop portions (AN) in the blade region (2) and the azimuthal middle region (ZB), wherein the at least one damping device comprises a spring element (FE) and a holder (HE) with a metal tab (MT), the arrangement (S3) of the at least one damping device (4) being carried out in such a way that the metal tab is plastically pressed around the stop portion (AN) in such a way that the spring element is fastened on the ratchet wheel in such a way that one spring or two springs extend away from the stop portion (AN) and the one spring extends into one or each spring respectively into another azimuthal middle region (ZB), and wherein the holding element (HM) is respectively bent from the axial side around the impeller (1) in such a way that the holding element (HM) axially fixes the impeller (1) after the impeller (1) is inserted into the free space of the ratchet wheel (3); and - a locking pawl (SK) is provided, which can be snapped into one of the recesses (VT) and by which a rotational movement of the ratchet wheel (3) can be locked, wherein the transfer of a torque from the stop portion (AN) onto the blade region (2) can be at least partially absorbed by the damping device (4) in the case of a locking of the ratchet wheel (3).

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