Parking device

Abstract

This invention discloses a parking device comprising a parking mechanism and a manual lock release mechanism, wherein the parking mechanism is connected to the shaft of the reduction gear and controls the shaft of the reduction gear to a parked state or to an unlocked state in the parked state, the parking mechanism is immersed in lubricating oil in the housing of the reduction gear, and the manual lock release mechanism has one end located in the driver's cab and the other end connected to the parking mechanism and drives the parking mechanism to control the shaft of the reduction gear to switch to an unlocked state in the parked state, thereby enabling parking and unlocking of commercial vehicles by using the parking mechanism to restrict the rotation of the shaft of the reduction gear, specifically by stopping the rotation of the shaft of the reduction gear or restoring the rotation of the shaft of the reduction gear. Furthermore, if the parking mechanism becomes inoperable after entering the parking-in state, the manual lock release mechanism in the driver's cab can be controlled to drive the unlocking of the parking mechanism, thereby ensuring timely unlocking, and thus improving the technical effects of safety and convenience of the parking device.

Description

Cross-reference to related applications

[0001] This application claims priority based on a Chinese utility model application filed with the China National Intellectual Property Administration on April 21, 2023, with application number 202320918033.9 and application title "Parking device", the entire content of which is incorporated herein by reference.

Technical Field

[0002] The present invention belongs to the technical field of parking, and specifically relates to a parking device that can be used for commercial vehicles.

Background Art

[0003] Commercial vehicles (including all freight vehicles and buses with 9 or more seats, and are classified into 5 types: buses, trucks, semi-trailers, unfinished buses, and unfinished trucks) may encounter traffic jams or be in an uphill or downhill state during driving. In such cases, the driver needs to park the commercial vehicle by braking with the foot brake or the hand brake.

[0004] Commercial vehicles are characterized by a large number of kilometers traveled per single trip and a long driving time of the driver. Therefore, frequently using the braking by foot brake or the braking by hand brake not only increases the driver's fatigue, but also the method of parking by using the braking by foot brake or the braking by hand brake has a safety risk of slippage, and it may also lead to the situation where the brake disc overheats and fails. Conventional commercial vehicles achieve parking of commercial vehicles by providing an electronic parking device instead of a foot brake or a hand brake.

[0005] Currently, the parking mechanism includes a parking motor, transmission shaft, toggle guide plate, pawl, ratchet, and an intermediate transmission shaft within the gearbox body. By driving the parking motor to rotate the transmission shaft and the toggle guide plate in the forward and reverse directions, locking and unlocking can be achieved between the pawl and the ratchet. By controlling the starting / stopping of the intermediate transmission shaft in the gearbox instead of braking with the foot brake or hand brake, the problem of the vehicle sliding down due to prolonged parking is avoided, thereby achieving the objective of preventing the vehicle from moving during prolonged parking.

[0006] However, the following problems were discovered during use with the above-mentioned parking mechanism.

[0007] (1) The meshing position between the ratchet and the pawl, the toggle guide plate, and the transmission shaft are all located above the gearbox body. Gearboxes often employ a splash lubrication system, but the rotational speed of the gears inside the gearbox in the parking state is low, making it impossible to achieve proper lubrication of the parking mechanism. As a result, the meshing position between the ratchet and the pawl, the toggle guide plate, and the transmission shaft experience increased wear during the transmission process, reducing the durability of the parking mechanism and leading to its failure.

[0008] (2) If the power supply to the parking motor is interrupted during driving, the parking mechanism is located at the bottom of the vehicle. Therefore, in order to unlock the pole and ratchet, the driver must operate the mechanism at the bottom of the vehicle, which reduces the safety of unlocking the parking lock and increases the difficulty of unlocking the parking lock.

[0009] (3) The width of the ratchet teeth is similar to the shape and dimensions of the pawl, and in order to enable the pawl to be parked into the ratchet, the ratchet must be placed on an intermediate shaft with a low rotational speed. A shaft with a low rotational speed has high torque and high inertia, so the impact that the parking mechanism receives during the parking-in process increases, which reduces the durability of the parking mechanism. Furthermore, because the intermediate shafts of different gearboxes have different speeds, if this parking mechanism is installed in the reduction gear of a commercial electric vehicle, the reduction gear, which has a single range and a large gear ratio, will not have an opportunity for the pawl to enter the ratchet's tooth groove width, making it impossible to park the vehicle. This will lead to the parking brake failing to engage and affect the safety of the commercial vehicle.

[0010] (4) When the parking mechanism is installed in the power assembly of a commercial electric vehicle, the torque of the motor output of the commercial electric vehicle is large, so in order to overcome this torque, it is necessary to design a larger parking mechanism to complete the parking operation, which leads to an increase in the volume of the parking mechanism, and as a result the use of the parking mechanism is limited. [Overview of the Initiative] [Problems that the invention aims to solve]

[0011] In response to the above problems, the present invention discloses a parking device that either solves the above problems or solves them at least partially. [Means for solving the problem]

[0012] To achieve the above objective, the present invention employs the following technical embodiments.

[0013] A parking device comprising a parking mechanism and a manual lock release mechanism, wherein the parking mechanism is connected to the shaft of the reduction gear and controls the shaft of the reduction gear to a parked state or to an unlocked state, and the parking mechanism is immersed in lubricating oil within the housing of the reduction gear. The manual lock release mechanism has one end located in the driver's cabin and the other end connected to the parking mechanism, and drives the parking mechanism to control the reduction gear shaft so that it switches to the unlocked parking state.

[0014] Selectively, the manual lock release mechanism includes a manual pull rod, one end of which extends into the driver's cab and the other end of which is connected to the parking mechanism for driving the movement of the parking mechanism.

[0015] Selectively, the manual lock release mechanism further includes a link, the manual pull rod reciprocates linearly along its own axial direction, and the manual pull rod is connected to the parking mechanism via the link.

[0016] Selectively, the parking mechanism is provided with an arc-shaped groove, the link has one end located within the arc-shaped groove and the other end movably connected to the manual pull rod, and the concentric angle of the arc-shaped groove is greater than or equal to the rotation angle of the parking mechanism.

[0017] Selectively, the parking mechanism includes a parking gear, a parking pawl, a pawl pivot shaft, an eccentric cam, a parking guide shaft, a position regulating plate, and a return spring, wherein the parking gear is connected to the shaft of the reduction gear, the parking pawl is located below the parking gear, and the parking-in end of the parking pawl can form an engagement with the parking gear. The pole pivot shaft and the parking guide shaft are each connected to the housing of the reduction gear, the connecting end of the parking pole is externally mounted on the pole pivot shaft, the parking-in end of the parking pole is located above the eccentric cam and in contact with the arc-shaped surface of the eccentric cam, the arc-shaped groove is provided on the eccentric cam, the eccentric cam is loosely fitted to the parking guide shaft, the position regulating plate is connected to the parking guide shaft, and both ends of the return spring are connected to the position regulating plate and the eccentric cam, respectively.

[0018] Selectively, the parking mechanism further includes a roller and a connecting rod, the connecting rod being connected to the parking-in end of the parking pole, the roller being pivotally connected to the connecting rod, and the parking pole contacting the arcuate surface of the eccentric cam via the roller.

[0019] Optionally, the parking mechanism further includes a torsion spring. One end of the torsion spring is connected to the housing of the speed reducer, and the other end is connected to the parking pole. The torsion spring is for driving the parking pole to disengage from the parking gear.

[0020] Optionally, an annular seal groove is provided in the manual pull rod, and a seal ring is provided in the seal groove. The seal groove is located at the connection position between the manual pull rod and the housing of the speed reducer.

[0021] Optionally, the length of the tooth groove of the parking gear is greater than the length of the parking-in end of the parking pole.

[0022] Optionally, the parking gear is connected to the input shaft of the speed reducer. Invention Effect

[0023] The advantages and beneficial effects of the present invention are as follows.

[0024] In the parking device of the present invention, by providing a parking mechanism and a manual unlocking mechanism, the rotation of the shaft of the speed reducer is restricted through the parking mechanism. Specifically, the rotation of the shaft of the speed reducer can be stopped or restored, so as to realize the parking and unlocking of a commercial vehicle. When the parking mechanism cannot operate by itself after entering the parking-in state, by controlling the manual unlocking mechanism in the cab, the unlocking of the parking mechanism can be driven to ensure that the parking mechanism can be unlocked in a timely manner. Therefore, the technical effects of the safety and convenience of the parking device are improved.

Brief Description of the Drawings

[0025] By reading the following detailed description of the preferred embodiments, various other advantages and merits will become apparent to those skilled in the art. The drawings are merely illustrative of the preferred embodiments and should not be construed as limiting the present invention. Also, throughout the drawings, the same reference numerals are assigned to the same components.

[0026] [Figure 1] Figure 1 is a schematic structural diagram of the parking device of this embodiment from the first perspective. [Figure 2] Figure 2 is a schematic structural diagram of the parking device of this embodiment from the second perspective. [Figure 3] Figure 3 is a schematic structural diagram of the connection position between the parking device of this embodiment and the reducer case.

Modes for Carrying Out the Invention

[0027] To make the objectives, technical aspects, and advantages of the present invention clearer, the technical aspects of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts are included within the protection scope of the present invention.

[0028] The terms "comprising / include", "consisting of", or any other variation are intended to cover non-exclusive inclusion. Therefore, a product, device, procedure, or method that includes a series of elements may include not only those elements but also other elements not explicitly listed as required, or elements specific to such a product, device, procedure, or method. It should be understood that without further limitation, the elements defined by the terms "comprising / include", "consisting of" do not exclude the existence of the same elements in other products, devices, procedures, or methods that include such elements.

[0029] Furthermore, the directions or positional relationships indicated by terms such as "up," "down," "front," "back," "left," "right," "top," "bottom," "inside," and "outside" are based on the directions or positional relationships shown in the drawings and are solely for the purpose of facilitating and simplifying the explanation of the present invention. They do not indicate or suggest that the devices, parts, or structures mentioned have a specific orientation or must be configured or operated in a specific orientation, and should not be understood as limitations on the present invention.

[0030] The technical aspects of each embodiment of the present invention will be described in detail below, along with the drawings.

[0031] As shown in Figures 1 to 3, this embodiment discloses a parking device applicable to commercial vehicles, which includes a parking mechanism 1 and a manual lock release mechanism 2. The parking mechanism 1 is connected to the shaft of the reduction gear and controls the shaft of the reduction gear to be in a parked state or unlocked from the parked state, and the parking mechanism 1 is immersed in the lubricating oil of the reduction gear housing 42.

[0032] Of these, the manual lock release mechanism 2 has one end located in the driver's cabin and the other end connected to the parking mechanism 1, and is for driving the movement of the driven parking mechanism. If the parking mechanism 1 is parked in and becomes unable to operate itself, the manual lock release mechanism can be driven in the driver's cabin to control the movement of the parking mechanism to the unlocked state, thereby enabling the lock to be released from the parking state.

[0033] In the parking device of this embodiment, by providing a parking mechanism and a manual lock release mechanism, the rotation of the reduction gear shaft can be restricted by the parking mechanism, specifically by stopping the rotation of the reduction gear shaft or restoring its rotation, thereby enabling parking and unlocking of the commercial vehicle. Furthermore, if the parking mechanism becomes inoperable after entering the parking-in state, the manual lock release mechanism in the driver's cab can be controlled to drive the unlocking of the parking mechanism, ensuring that the parking mechanism can be unlocked in a timely manner. Thus, the technical effects of the safety and convenience of the parking device are improved.

[0034] As shown in Figures 1 to 3, in this embodiment, the parking mechanism 1 includes a parking gear 10, a parking pawl 12, a pawl pivot shaft 14, an eccentric cam 15, a parking guide shaft 16, a position regulating plate 17, and a return spring 18. The parking gear 10 is connected to the shaft of the reduction gear via a spline, and the parking pawl 12 is located below the parking gear 10. When the parking pawl is parked in the parking gear, the parking state is achieved, and when the parking pawl is disengaged from the parking gear, the parking state is released.

[0035] In this configuration, the parking pawl is positioned below the parking gear, so that the meshing position between the parking pawl and the parking gear, the pawl's pivot axis, the eccentric cam, and the parking guide axis are all located within the lubricating oil of the reduction gear housing. As a result, shocks during the transmission process are reduced, and the durability of the parking mechanism is further improved.

[0036] Specifically, the pole pivot shaft 14 and the parking guide shaft 16 are connected to the reduction gear housing 42, respectively. In Figure 1, the connecting end of the parking pole 12 is externally mounted on the pole pivot shaft 14, and the parking-in end 121 of the parking pole 12 is located above the eccentric cam 15 and can contact the arcuate surface of the eccentric cam 15. The eccentric cam 15 is provided with an arcuate groove 11 for connection to the manual lock release mechanism 2.

[0037] Furthermore, the eccentric cam 15 is loosely fitted onto the parking guide shaft 16, and the parking guide shaft 16 is provided with a position regulating block 161 for fixing the axial position of the eccentric cam 15. On the other hand, the position regulating plate 17 is connected to the parking guide shaft 16 and can rotate with the parking guide shaft 16 relative to the eccentric cam 15, and the return spring 18 is located between the position regulating plate 17 and the eccentric cam 15, with both ends of the return spring 18 connected to the position regulating plate 17 and the eccentric cam 15, respectively.

[0038] As shown in Figure 1, when the parking mechanism is in the parking state, the parking guide shaft 16 is rotated counterclockwise by controlling an actuator (not shown), and the position regulating plate 17 is further rotated counterclockwise. In this process, the position regulating plate 17 rotates the eccentric cam 15 counterclockwise by compressing the return spring 18, so that the convex position of the arc-shaped surface can drive the parking-in end 121 of the parking pawl to rotate counterclockwise around the pawl pivot axis 14. As a result, the parking-in end 121 of the parking pawl is parked in the tooth groove of the parking gear 10, locking it to the parking gear, and at this time the rotation of the reduction gear shaft stops, and the commercial vehicle is in the parking state.

[0039] The return spring 18 enables flexible driving of the eccentric cam 15. Specifically, during the parking-in process, when the parking pawl 12 contacts the teeth of the parking gear 10, the parking pawl 12 drives the eccentric cam 15 to push the return spring 18 downward. This enables flexible contact between the eccentric cam and the parking gear, preventing violent collisions between the parking pawl and the parking gear that could damage the integrity of the parking pawl and parking gear. As a result, the durability of the parking pawl and parking gear is improved.

[0040] When the parking mechanism unlocks the parking state, the actuator rotates the parking guide shaft 16 clockwise, and further rotates the position regulating plate 17 clockwise. Additionally, by extending the return spring 18, the eccentric cam 15 rotates clockwise, so that the concave position of the arc-shaped surface corresponds to the parking in end 121 of the parking pawl. As a result, the parking pawl 121, having lost its support, rotates downward clockwise around the pawl pivot shaft 14 and disengages from the tooth groove of the parking gear 10. Consequently, the reduction gear shaft continues to rotate without restriction, and the unlocking of the parking state is completed.

[0041] As shown in Figure 2, in this embodiment, the parking mechanism 1 further includes a roller 5 and a connecting rod 6. The connecting rod 6 is connected to the parking-in end 121 of the parking pole, the roller 5 is pivotally connected to the connecting rod 6, and the parking pole 12 is rollingly connected to the arcuate surface of the eccentric cam 15 via the roller 5. In this way, the frictional force when the parking pole moves on the eccentric cam is reduced, and the wear from motion between the parking pole and the eccentric cam is reduced, thereby achieving the technical effect of improving the durability of the parking pole and the eccentric cam.

[0042] As shown in Figures 1 and 2, preferably in this embodiment, the parking mechanism 1 further includes a torsion spring 7. One end of the torsion spring 7 is connected to the housing 42 of the reduction gear, and the other end is connected to the end face of the parking pawl 12.

[0043] During the process in which the parking pawl 12 rotates until it parks into the tooth groove of the parking gear 10, the eccentric cam 15 needs to overcome the elastic force of the torsion spring 7 to park the parking pawl 12 into the parking gear 10. At this time, the torsion spring 7 is in an extended state and tends to move the parking pawl 12 in the direction away from the tooth groove of the parking gear 10. Therefore, when the concave position of the arc-shaped surface of the eccentric cam 15 corresponds to the parking-in end 121 of the parking pawl, the extended torsion spring 7 provides power for the separation between the parking gear 10 and the parking pawl 12, allowing the parking pawl 12 to immediately move in the direction of the tooth groove away from the parking gear 10. As a result, timely unlocking of the parking state is ensured.

[0044] The return spring and torsion spring may each be in the form of a torsion spring, or of course, a tension spring, and can each provide power to the movement of the eccentric cam and parking pawl.

[0045] As shown in Figures 1 and 2, preferably, the length of the tooth grooves of the parking gear 10 along the circumferential direction of the parking gear 10 is greater than the length of the parking-in end 121 of the parking pawl. This makes it easier for the parking pawl to park into the tooth grooves, so that the parking mechanism can be applied to the shafts of reduction gears of various speeds. Based on this, even when the parking device is installed in a commercial vehicle with a single range and a large gear ratio, the parking pawl can park into the tooth grooves of the parking gear in a timely manner, and the durability of the parking mechanism is improved because the probability of collision between the parking pawl and the parking gear is reduced.

[0046] In one of these methods, the length of the tooth groove can be increased by reducing the number of teeth on the parking gear, or by increasing the dimensions of the parking gear without changing the number of teeth.

[0047] Based on this, in this embodiment, the parking gear is connected to the input shaft of the reduction gear, and this input shaft may specifically be the motor shaft of the reduction gear. In this way, by utilizing the characteristic that the torque of the input shaft of the reduction gear is small, the torque that the pole needs to overcome and the inertia of the parking gear can be reduced, thereby reducing the dimensions of the parking mechanism and further saving internal space in the reduction gear.

[0048] In other embodiments, depending on whether the parking gear is connected to shafts with different rotational speeds, the length of the teeth of the parking gear and the distance between the parking-in end of the parking pawl can be adjusted to ensure that the parking pawl can be parked into the parking gear.

[0049] As shown in Figure 3, preferably, the position regulating plate 17 is provided with a bent position 171. The bent position 171 limits the counterclockwise rotation angle of the eccentric cam 15, preventing the eccentric cam from colliding with the inside of the reduction gear case and being damaged due to excessive rotation, thus achieving the technical effect of improving the durability of the eccentric cam. Furthermore, by limiting the counterclockwise rotation angle of the eccentric cam 15 with the bent position 171, when the eccentric cam 15 rotates to its maximum counterclockwise angle, the convex surface of the arc-shaped surface of the eccentric cam 15 comes into contact with the parking-in end 121 of the parking ratchet. This ensures that the parking-in end of the parking ratchet is accurately pressed into the tooth groove of the parking gear and held in place, preventing the parking-in end of the parking ratchet from slipping out of the tooth groove of the parking gear due to excessive rotation of the eccentric cam, and further improving the parking-in control accuracy of the parking ratchet.

[0050] In this embodiment, the parking guide shaft 16 is provided with a flat groove surface, and the position regulating plate 17 is provided with a flat groove hole. By fitting the flat groove surface and the flat groove hole, radial positioning can be formed relative to the position regulating plate 17, making it possible to rotate the position regulating plate.

[0051] Furthermore, the inner wall of the flattened groove surface may be provided non-parallel to the inner wall of the flattened groove hole. In this case as well, the position regulating plate can be locked in place to achieve radial positioning of the position regulating plate, and the inner wall of the flattened groove surface can be adaptively adjusted according to the different models of actuators that control the rotation of the parking guide shaft.

[0052] As shown in Figures 1 to 3, in this embodiment, the manual lock release mechanism 2 includes a manual pull rod 21. One end of the manual pull rod 21 extends into the driver's cab, and the other end is connected to the parking mechanism 1. The manual pull rod has the advantages of being simple in structure, readily available, and low in cost.

[0053] Preferably, a drive element is provided at one end of the manual pull rod 21, and the manual pull rod 21 extends into the driver's cab via the drive element. This makes it convenient to adjust the position in the driver's cab where the manual lock release mechanism is located.

[0054] In this embodiment, the drive element may be a link mechanism, the drive end of the link mechanism located in the driver's cabin, and by operating the link mechanism, the manual pull rod 21 is driven to rotate the eccentric cam 15 clockwise, and further disengaging the parking pawl 16 from the parking gear 10 completes the unlocking of the parking-in state.

[0055] In other embodiments, depending on the overall vehicle design, the drive elements may be a control button and an electric push rod. For example, the control button is connected to an electric push rod, which moves a manual pull rod and further rotates an eccentric cam counterclockwise. In this way, pressing the control button in the driver's cab enables extension and retraction of the electric push rod, as well as movement of the manual pull rod, and similarly enables parking in and unlocking from the parking state.

[0056] Furthermore, the manual pull rod 21 extends to the outside of the reduction gear housing 42, facilitating connection between the drive element and the manual pull rod. Additionally, the constraint imposed by the reduction gear housing 42 allows the manual pull rod to move along its own axial direction, i.e., the M direction in Figure 1, thus improving the ease of controlling the direction of motion of the manual pull rod.

[0057] Based on this, the parking device further includes a link 3. One end of the link 3 is hinged to the manual pull rod 21, and the other end is connected to the parking mechanism 1.

[0058] As shown in Figure 2, in this embodiment, the manual pull rod 21 is provided with an annular seal groove 22, and a seal ring is provided inside the seal groove 22. The manual pull rod 21 is sealed to the reduction gear housing 42 via the seal ring, so that the reduction gear housing is always sealed.

[0059] As shown in Figure 1, one end of link 3 is connected to a cylindrical pin, which is located within the arc-shaped groove 11 of the eccentric cam 15, and the other end of link 3 is hinged to the manual pull rod 21 via a dowel.

[0060] Based on this, as shown in Figure 1, if the parking mechanism itself can perform parking in and unlocking, there is no need to operate the manual pull rod 21. That is, the position of the manual pull rod 21 relative to the reduction gear housing 42 remains unchanged. At this time, in the process of the parking mechanism 1 driving the eccentric cam 15 to reciprocate, the cylindrical pin at the end of the link 3 slides relative to the arc-shaped groove 11 due to the hinge connection between the manual pull rod 21 and the link 3, thus ensuring that the parking in and unlocking operations by the drive mechanism are completed smoothly.

[0061] If the parking mechanism 1 is in the parking-in position and cannot unlock itself, pulling the manual pull rod 21 along the M direction will cause the cylindrical pin at the end of the link 3 to move along the arc-shaped groove 11 due to the hinge connection between the manual pull rod 21 and the link 3. Once the cylindrical pin at the end of the link 3 has been pulled to the left end position of the arc-shaped groove 11, continuing to pull the manual pull rod 21 will allow the eccentric cam 15 to rotate clockwise as shown in Figure 1 due to the link 3 and the cylindrical pin at its end. Furthermore, the torsion spring 7 drives the parking pawl 12, causing the parking-in end 121 of the parking pawl to disengage from the tooth groove, completing the unlocking operation of the parking state.

[0062] Preferably, the center angle of the arc-shaped groove 11 is greater than or equal to the rotation angle of the eccentric cam 15. In this way, it is ensured that the manual pull rod does not move in conjunction with the parking mechanism during the parking-in process, and the simplicity of the movement trajectory of the manual pull rod is improved, thereby improving the technical effect of ease of control of the manual pull rod.

[0063] Furthermore, preferably, when the parking mechanism 1 is in the parking-in state, the left end of the arc-shaped groove 11 in Figure 1 is in contact with the cylindrical pin. Thus, when the parking lock is released by pulling the manual pull rod 21, the manual pull rod 21 immediately rotates the eccentric cam 15 via the link 3 and the cylindrical pin at its end. This improves the response speed of releasing the parking lock by pulling the manual pull rod, ensuring timely release of the parking lock.

[0064] The above-described embodiments are merely examples of the present invention and do not limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, extensions, etc., made within the spirit and principles of the present invention shall all be included within the scope of protection of the present invention.

Claims

1. A parking device comprising a parking mechanism and a manual lock release mechanism, wherein the parking mechanism is connected to the shaft of the reduction gear and controls the shaft of the reduction gear to a parked state or to an unlocked state, and the parking mechanism is immersed in lubricating oil within the housing of the reduction gear. The parking device is characterized in that the manual lock release mechanism has one end located in the driver's cabin and the other end connected to the parking mechanism, and drives the parking mechanism to control the shaft of the reduction gear to switch to the unlocked parking state.

2. The parking device according to claim 1, wherein the manual lock release mechanism includes a manual pull rod, one end of which extends into the driver's cabin and the other end of which is connected to the parking mechanism and is for driving the movement of the parking mechanism.

3. The parking device according to claim 2, wherein the manual lock release mechanism further includes a link, the manual pull rod reciprocates linearly along its own axial direction, and the manual pull rod is connected to the parking mechanism via the link.

4. The parking device according to claim 3, wherein the parking mechanism is provided with an arc-shaped groove, the link has one end located in the arc-shaped groove and the other end movably connected to the manual pull rod, and the concentric angle of the arc-shaped groove is greater than or equal to the rotation angle of the parking mechanism.

5. The parking mechanism includes a parking gear, a parking pawl, a pawl pivot shaft, an eccentric cam, a parking guide shaft, a position regulating plate, and a return spring. The parking gear is connected to the shaft of the reduction gear, the parking pawl is located below the parking gear, and the parking-in end of the parking pawl can form an engagement with the parking gear. The parking device according to claim 4, characterized in that the pole pivot shaft and the parking guide shaft are each connected to the housing of the reduction gear, the connecting end of the parking pole is externally mounted on the pole pivot shaft, the parking-in end of the parking pole is located above the eccentric cam and in contact with the arc-shaped surface of the eccentric cam, the arc-shaped groove is provided on the eccentric cam, the eccentric cam is loosely fitted to the parking guide shaft, the position regulating plate is connected to the parking guide shaft, and both ends of the return spring are connected to the position regulating plate and the eccentric cam, respectively.

6. The parking device according to claim 5, further comprising a roller and a connecting rod, wherein the connecting rod is connected to the parking-in end of the parking pole, the roller is rotatably connected to the connecting rod, and the parking pole contacts the arcuate surface of the eccentric cam via the roller.

7. The parking device according to claim 5 or 6, wherein the parking mechanism further includes a torsion spring, one end of which is connected to the housing of the reduction gear and the other end of which is connected to the parking pawl, and which drives the parking pawl to disengage from the parking gear.

8. The parking device according to any one of claims 4 to 6, characterized in that the manual pull rod is provided with an annular seal groove, a seal ring is provided in the seal groove, and the seal groove is located at the connection position between the manual pull rod and the housing of the reduction gear.

9. The parking device according to claim 5 or 6, characterized in that the length of the tooth groove of the parking gear is greater than the length of the parking-in end of the parking pole.

10. The parking device according to claim 5 or 6, characterized in that the parking gear is connected to the input shaft of the reduction gear.

Images