A hub motor parking mechanism and parking method

Abstract

This invention relates to the field of vehicle parking technology and proposes a hub motor parking mechanism and method, including a base, a locking disc, pawls, and a linear push-pull mechanism. The base is fixed to the side of the hub motor that does not rotate with the wheel. The locking disc is rotatably disposed within the base and fixed to the hub motor's shaft. The locking disc includes a protrusion offset from the axis of the hub motor's shaft. There are two pawls, with their opposite ends hinged within the base. The protrusion selectively abuts against one of the two pawls. This hub motor parking mechanism and method, by setting the locking disc and pawls, replaces the parking torque generated by traditional friction with a parking block limiting mechanism, resulting in a simpler structure and easier generation of parking torque.

Description

Technical Field

[0001] This invention relates to the field of vehicle parking technology, and in particular to a hub motor parking mechanism and parking method. Background Technology

[0002] With the development of new energy vehicles, the application of in-wheel motors is becoming increasingly common. However, in-wheel motors typically occupy a large amount of wheel hub space, limiting the layout and functionality of service and parking brakes. Traditional cable-operated parking brake systems and electronic EPB parking brake systems are no longer suitable.

[0003] Currently, there are two main types of parking calipers. One type is a hydraulic caliper with a built-in energy storage spring that is always in the parking position. This type of parking caliper requires an accumulator to establish stable pressure in the parking line to ensure that the energy storage spring is lifted during driving so that the parking position can be released. It also needs to maintain stable pressure in the parking line. It is usually arranged symmetrically with the driving caliper, which will occupy the space of the driving brake. The other type is arranged separately from the driving caliper on the other side of the wheel hub motor, using an energy storage spring type hydraulic parking caliper or an electronic parking caliper. The former requires an accumulator to provide a stable pressure source, while the latter requires a larger size and mass to provide a certain parking torque.

[0004] Regardless of the parking structure mentioned above, all require a significant amount of space, increasing the difficulty of configuring vehicle space. Summary of the Invention

[0005] In view of this, the present invention proposes a hub motor parking mechanism and parking method. By cooperating with the pawl and the protrusion, the hub motor shaft is locked, so that the parking torque is no longer limited to the friction between the brake disc and the parking mechanism, and no power source energy positively correlated with the parking torque is required. By making full use of structural features and material properties to provide a greater parking torque, the number of parts of the parking device is reduced, making the parking mechanism lighter and more compact, and improving the flexibility of vehicle space configuration.

[0006] The technical solution of this invention is implemented as follows:

[0007] On one hand, the present invention provides a hub motor parking mechanism, including a base, a locking disc, a pawl, and a linear push-pull mechanism, wherein,

[0008] The base is fixed to the side of the hub motor that does not rotate with the wheel;

[0009] The locking disc is rotatably mounted inside the base and fixed to the hub motor shaft. The locking disc includes a protrusion that is offset from the axis of the hub motor shaft.

[0010] There are two claws, which are arranged opposite each other. The opposite ends of the two claws are hinged to the base. The protrusion selectively abuts against one of the two claws.

[0011] The linear push-pull mechanism is fixed inside the base and has a linear movable end. The linear movable end can move along the diameter direction of the hub motor shaft and is flexibly connected to the two jaws. The linear movable end is used to push at least one of the two jaws closer to or away from the locking disc.

[0012] When one of the two claws abuts against the protrusion, the claw prevents the protrusion from moving toward the abutting side, and the linear movable end selectively pushes the other claw away from the locking disc.

[0013] Based on the above technical solutions, preferably, a flexible connecting component is also included, which is fixed on the linear movable end and connected to the two jaws via a transmission.

[0014] More preferably, the flexible connection assembly includes two first elastic elements, one end of each of the two first elastic elements is disposed on a linear movable end, and the other end is disposed on two claws respectively.

[0015] More preferably, the flexible connection assembly further includes a connecting seat and two supports, wherein,

[0016] The connecting seat is fixed on the linear movable end;

[0017] The two supports are hinged to both ends of the connecting seat and fixed to the two first elastic elements respectively.

[0018] Based on the above technical solutions, preferably, the claw has an arc-shaped groove on the side near the locking disc.

[0019] Based on the above technical solutions, preferably, it also includes a cover, wherein one side of the base is open, and the cover is fixed to the open side of the base to seal the opening of the base.

[0020] Based on the above technical solutions, preferably, the locking disc further includes a connecting shaft and a disc body, wherein,

[0021] One end of the connecting shaft extends to the outside of the base and is fixed coaxially with the rotating shaft of the hub motor. The connecting shaft is rotatably mounted on the base via bearings.

[0022] The disc body is fixed to one end of the connecting shaft located inside the base, and the protrusion is fixed to the outside of the disc body.

[0023] More preferably, the number of the bumps is multiple, and they are distributed in a ring around the connecting shaft on the disk body.

[0024] Based on the above technical solution, preferably, it also includes two second elastic members, one end of each of the two second elastic members is respectively disposed on the two claws, and the other end of each is disposed on the base.

[0025] On the other hand, the present invention provides a wheel hub motor parking method, which is based on a wheel hub motor and the above-mentioned parking mechanism, including a parking state, a parking pre-release state and a parking release state of the parking mechanism;

[0026] When the vehicle is in motion, the parking mechanism is in the parking disengaged state;

[0027] When the vehicle is parked on a slope, the parking mechanism switches from the parking release state to the parking state;

[0028] When the vehicle starts on a slope, the parking mechanism switches from the parking state to the parking preparation release state, and then to the parking release state; among these,

[0029] When the vehicle is in the parking state, both of the pawls are in contact with the locking disc, and the protrusion is located between the two pawls. The parking state can be switched to the parking preparation release state or the parking release state.

[0030] When the parking is ready to be released, one of the two claws abuts against the protrusion, and the other claw disengages from the locking disc. The parking is ready to be released state can be switched to the parking state or the parking is released state.

[0031] When the parking brake is released, both of the locking claws disengage from the locking disc, and the parking brake release state can be switched to the parking state.

[0032] The hub motor parking mechanism and parking method of the present invention have the following advantages over the prior art:

[0033] (1) By setting a locking disc and a pawl, the parking torque generated by the traditional friction force is changed to the parking top block limit method to provide the parking torque. The structure is simpler and the parking torque is easier to form. After the parking torque is formed, the parking torque is no longer limited to the friction force between the brake disc and the parking mechanism, nor does it require the power source energy that is positively correlated with the parking torque. Instead, it depends on the yield limit of the material. By making full use of the structural features and material properties, a larger parking torque is provided, the number of parts of the parking device is reduced, and the weight is lighter and more compact.

[0034] (2) A flexible connection component is set up. The parking state can be switched through a simple elastic element and push rod mechanism, realizing the parking and parking release functions. It is convenient and reliable. At the same time, in places such as slopes, after starting the vehicle and releasing the foot brake, the wheel hub motor is restricted to rotate in one direction to prevent the vehicle from sliding downhill. This provides the driver with time to adapt to the slope and the time required to press the accelerator, thus improving driving safety. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the assembly of the hub motor parking mechanism and the hub motor of the present invention;

[0037] Figure 2 This is an exploded view of the hub motor parking mechanism of the present invention;

[0038] Figure 3 This is a schematic diagram of the parking release state of the hub motor parking mechanism of the present invention;

[0039] Figure 4 This is a schematic diagram of the parking state of the hub motor parking mechanism of the present invention;

[0040] Figure 5 This is a schematic diagram of the parking pre-release state of the hub motor parking mechanism of the present invention. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0042] Taking a passenger car weighing around 2 tons as an example, when parking on a 40% slope, the parking handle of the cable parking mechanism should not exceed 400N according to industry standards. At this time, the transmission ratio of the parking mechanism and the transmission ratio of the parking handle are both above 6, the lever mechanism occupies a lot of space and is difficult to arrange.

[0043] like Figure 1-5 As shown, the wheel hub motor parking mechanism of the present invention replaces the parking torque generated by traditional friction with the parking torque provided by the parking top block limiting method. The structure is simpler and the parking torque is easier to form. Specifically, it includes a base 1, a locking plate 2, a pawl 3 and a linear push-pull mechanism 4.

[0044] The base 1 is fixed to the side of the hub motor that does not rotate with the wheel, that is, fixed to the housing of the hub motor that does not rotate with the wheel. The fixing method can be multi-bolt fixing or welding. As the main shell of this parking mechanism, the base 1 needs to withstand a large thrust when parking, so a material with good mechanical stability, such as aluminum alloy, should be selected. The base 1 is box-shaped and has an opening on the side away from the hub motor. It should be noted that the base 1 is set with the hub motor shaft as the center and the width is smaller than the diameter of the hub motor.

[0045] The locking disc 2 is rotatably mounted inside the base 1 and fixed to the rotating shaft of the hub motor. That is, the locking disc 2 is fixed to the rotor part of the hub motor. As the rotor of the hub motor rotates, when parking, locking the locking disc 2 can prevent the wheels from rotating, thereby completing the parking action. The locking disc 2 includes a protrusion 21, which is offset from the axis of the hub motor rotating shaft. Locking the hub motor rotor can be achieved by locking the protrusion 21. At the same time, since the protrusion 21 is offset from the axis of the hub motor rotor, a smaller locking force can be used to lock the hub motor rotor.

[0046] There are two pawls 3, which are arranged opposite each other. The opposite ends of the two pawls 3 are hinged to the base 1. The pawls 3 selectively abut against the protrusion 21. In the base 1, two hinge seats are also provided, which are respectively connected to the two pawls 3. The pawls 3 are set on the hinge seats by pins. Their free ends can move towards or away from the locking disc 2. During parking, the two pawls 3 can be moved to the two sides of the protrusion 21 respectively to prevent it from rotating in the forward and reverse directions, so as to realize the parking action. In addition, the two pawls 3 are preferably arranged in a left-right mirror image, so that the range of motion and force performance are the same when they are in action, and they have better mechanical stability.

[0047] The linear push-pull mechanism 4 is fixed inside the base 1 and has a linear movable end 41. The linear movable end 41 can move along the diameter direction of the hub motor shaft and is flexibly connected to the two claws 3. The linear movable end 41 moves so that the two claws 3 simultaneously tend to move closer to or away from the locking disc 2. Specifically, the two claws 3 are set as left and right mirror images, and there is a mirror axis. The mirror axis is perpendicular to and intersects the axis of the locking disc 2. The linear movable end 41 preferably moves linearly along the mirror axis so that the pushing and pulling forces on the two claws 3 are the same during the movement, avoiding excessive force on a single claw. At the same time, since the claws 3 and the linear movable end 41 are flexibly connected, when the claw 3 abuts against the protrusion 21, the claw 3 on one side cannot move, and the linear movable end 41 cannot drive the claw 3 away from the locking disc 2, thereby preventing the vehicle from sliding downhill when the parking brake is released.

[0048] In other words, when one of the two claws 3 abuts against the protrusion 21, the claw 3 will prevent the protrusion 21 from moving toward the abutting side, so that the locking disc 2 can only rotate in one direction. At the same time, the linear movable end 41 can push the other claw 3 away from or closer to the locking disc 2, realizing the parking and pre-parking release actions after one-way locking.

[0049] In addition, since the linear push-pull mechanism 4 does not need to provide the main parking force, an electric push rod can be directly selected. The thrust requirement is only 30-40N, which is much smaller than the parking lever pull force of 400N or the EPB thrust. The linear movable end 41 is the output end of the electric push rod.

[0050] In this embodiment, in order to achieve synchronous flexible transmission between the linear movable end 41 and the two jaws 3, a flexible connecting component 5 is also provided. The flexible connecting component 5 is fixed to the linear movable end 41 and is connected to the two jaws 3 in a transmission manner. The flexible connecting component 5 applies a pushing and pulling force to the jaws 3 through elastic deformation, so that after the jaws 3 are locked with the protrusion 21, they can still be deformed without causing the jaws 3 to reset. Similarly, the flexible connecting component 5 can apply a force to the jaws 3 to move away from the locking disc 2, so that they have a tendency to move away from the locking disc 2. When the jaws 3 move away from the protrusion 21, they can move away from the locking disc 2 under this tendency, thereby releasing the parking.

[0051] Specifically, the flexible connection assembly 5 includes two first elastic elements 51. One end of each of the two first elastic elements 51 is disposed on the linear movable end 41, and the other end is disposed on the two claws 3 respectively. Through the elastic deformation of the first elastic elements 51, a flexible connection between the linear movable end 41 and the claws 3 is achieved. In this embodiment, the first elastic element 51 is preferably a spring. When the linear movable end 41 is pushed upward, the first elastic element 51 applies a tendency to move away from the locking disc 2 on the two claws 3. If there is no obstruction on the claws 3, the claws 3 will move upward and away from the locking disc 2. If a single claw 3 is obstructed, the claw 3 will remain in contact with the protrusion 21, but the movement tendency applied to the claw 3 will remain unchanged until the protrusion 21 rotates away from the claw 3. Under this tendency, the claw 3 will rotate away from the locking disc 2, thus releasing the parking brake.

[0052] To enable the first elastic element 51 to adapt to the relative rotation between the claw 3 and the linear movable end 41, the flexible connection assembly 5 further includes a connecting seat 52 and two supports 53. The connecting seat 52 is fixed on the linear movable end 41, and the two supports 53 are respectively hinged to the two ends of the connecting seat 52 and respectively fixed to the two first elastic elements 51. When the claw 3 and the linear movable end 41 have relative displacement, the offset angle is large. The rotation of the supports 53 is used to compensate for this angle, thereby reducing the deformation of the first elastic element 51 in directions other than the length direction and improving the expansion and contraction stability of the first elastic element 51.

[0053] The connecting seat 52 is H-shaped, and the two supports 53 are respectively set in the slots at both ends and are hinged to the connecting seat 52 by pins.

[0054] In this embodiment, when the pawl 3 is not completely disengaged from the locking disc 2, the protrusion 21 may come into contact with the side of the pawl 3 during rotation. Therefore, an arc-shaped groove 31 is provided on the side of the pawl 3 near the locking disc 2, so that the protrusion 21 can avoid the pawl 3 through the arc-shaped groove 31, which greatly reduces the probability of contact and avoids mechanical collision and wear.

[0055] In addition, during parking, both pawls 3 are in contact with the locking disc 2, but the protrusion 21 is not between the two pawls 3. The protrusion 21 can be rotated, and the protrusion 21 pushes up one side of the pawl 3 through the arc groove 31, so that the protrusion 21 rotates between the two pawls 3 to achieve parking. Throughout the process, although the hub motor shaft still rotates at a certain angle after completing the parking action at different parking times to lock, due to the transmission ratio of about 8 to 12 between the shaft and the wheel, the rotation of the wheel during the actual parking process is extremely small, with a maximum of about 2°, which does not affect the actual parking effect.

[0056] To protect the internal components of the base 1, a cover 6 is also provided. The cover 6 is fixed to the opening side of the base 1. Specifically, the cover 6 can be fixed to the base 1 with screws, thereby sealing the inside of the base 1 and preventing dust from entering the base 1. This seals the inside of the base 1 and isolates the internal and external environments. The shape of the cover 6 is preferably the same as the opening shape of the base 1, and the material is the same as the base 1. The cover 6 can be disassembled to maintain, repair, or replace the internal structure of the base 1.

[0057] In this embodiment, the locking disc 2 further includes a connecting shaft 22 and a disc body 23. One end of the connecting shaft 22 extends to the outside of the base 1 and is fixed coaxially with the rotating shaft of the hub motor. The connecting shaft 22 is rotatably mounted on the base 1 via a bearing. The disc body 23 is fixed on the end of the connecting shaft 22 located inside the base 1. The protrusion 21 is fixed on the outside of the disc body 23. Specifically, a bearing is embedded in the base 1, and the connecting shaft 22 passes through the bearing to exit the base 1. Alternatively, the connecting shaft 22 can be configured as a splined shaft, and a corresponding keyway is provided on the hub motor rotor. The connecting shaft 22 is inserted into the keyway for transmission. At the same time, the base 1 is fixed to the hub motor, making it impossible to separate the connecting shaft 22 from the hub motor rotor.

[0058] In a preferred embodiment, there are multiple protrusions 21, which are distributed in a ring around the connecting shaft 22 on the disc body 23. This allows the connecting shaft 22 to be locked by one of the protrusions 21 during rotation, minimizing the rotation angle required for locking. In this embodiment, four protrusions 21 are used. Too many protrusions would prevent the pawl 3 from being set to a larger size, affecting the stability of parking.

[0059] In this embodiment, two second elastic elements 7 are also provided. One end of each of the two second elastic elements 7 is respectively provided on the two claws 3, and the other end is provided on the base 1. The second elastic elements 7 can be used to compensate for the pushing and pulling force of the first elastic element 51, improve the service life of the flexible transmission part, and accelerate the reset speed of the claw 3 after the protrusion 21 separates from the claw 3. The second elastic elements 7 can be springs, just like the first elastic element 51. After selecting the springs, they need to be hinged to the inner wall of the base 1 to adapt to the angle when the claw 3 is offset.

[0060] like Figure 3-5 As shown, the wheel hub motor parking method of the present invention is based on the wheel hub motor and the above-mentioned parking mechanism, and is used to lock the wheel hub motor rotor in all directions, lock it in one direction, and release the parking when the vehicle is parked, including the parking state, the parking preparation release state, and the parking release state of the parking mechanism.

[0061] When the vehicle is in motion, the parking mechanism is in the parking disengaged state. When the vehicle is parked on a slope, the parking mechanism switches from the parking disengaged state to the parking state. When the vehicle is started on a slope, the parking mechanism switches from the parking state to the parking preparation disengaged state, and then switches back to the parking disengaged state.

[0062] like Figure 4As shown, in the parking state, the linear movable end 41 of the linear push-pull mechanism 4 retracts to its shortest state. At this time, the first elastic element 51 is compressed, and the two claws 3 rotate downward and contact the locking disc 2. When the protrusion 21 on the locking disc 2 is in the middle of the two claws 3, the locking disc 2 rotates clockwise or counterclockwise to make the protrusion 21 abut against one of the two claws 3, thereby locking the rotating shaft and preventing it from continuing to rotate. When the two claws 3 are in the middle of two adjacent protrusions 21, the rotating shaft rotates clockwise or counterclockwise, so that the protrusion 21 first lifts one of the two claws 3. After passing the claw 3, the claw 3 rebounds to its original position under the push and pull of the first elastic element 51 and the second elastic element 7. The rotating shaft continues to rotate until one of the two claws 3 of the protrusion 21 is engaged, thus completing the parking process. Throughout the process, although the axle still rotates to a certain angle after completing the parking action at different parking moments before locking, the rotation of the wheels is extremely small, about 2°, due to the transmission ratio of about 8 to 12 between the axle and the wheels. This does not affect the actual parking effect. In addition, the parking state can be switched to the parking preparation release state or the parking release state in this state.

[0063] like Figure 5 As shown, in the parking preparation release state, since the parking state is in progress, one of the two pawls 3 is abutting against the protrusion 21. Therefore, during the movement of the linear movable end 41, it can only push the other pawl 3 away, causing the other pawl 3 to leave the locking disc 2. During this process, since only one pawl 3 is reset, the locking disc 2 can only rotate toward the reset pawl 3, and cannot rotate toward the side where the protrusion 21 and the pawl 3 are abutting. The parking preparation release state is mainly applicable to special scenarios such as starting on a slope. After the driver releases the foot brake, the vehicle will not roll downhill, providing the driver with time to adapt to the accelerator pedal travel required for the slope. In addition, in this state, the parking preparation release state can be switched to the parking state or the parking release state.

[0064] like Figure 3 As shown, when the parking is released, both of the claws 3 are disengaged from the locking disc 2, and the parking release state can be switched to the parking state. It should be noted that the parking release state cannot be directly switched to the parking preparation release state; it can only be switched by using the parking state as an intermediate state.

[0065] In addition, in this embodiment, the effective contact length between the protrusion 21 and the pawl 3 is 10mm, and the corresponding stroke of the linear movable end 41 is 14mm, so as to ensure that after unlocking, the height difference of the parking pawl 3 rotation is greater than 10mm, thus avoiding the state of unsuccessful unlocking.

[0066] Taking a parking arm with a 40mm diameter and a 40Cr material locking disc 2 and pawl 3 as an example, the parking torque under different contact lengths and widths is shown in the table below:

[0067]

[0068] The contact length refers to the length of contact between the rotating shaft and the parking chuck 3; the contact width refers to the width of contact between the rotating shaft and the parking chuck 3; the contact area is the contact length × the contact width; the contact strength refers to the yield strength of the material, which is 540 N / mm² for 40Cr material; the parking lever arm is the distance from the geometric center of the contact area to the rotation center; the contact force is the maximum contact force that the contact surface can withstand; and the parking braking torque is the maximum torque generated when locked.

[0069] As shown in the table, with a contact width of 10mm, each 1mm increase in contact width provides 216 N·m of parking braking torque. This means that, without changing the external dimensions of the mechanism, by replacing the locking disc 2 and the pawl 3 to increase the contact area, different parking braking torque requirements for different vehicle models can be met, achieving serialization at low cost. Alternatively, by replacing the material with a higher-strength one, the overall size of the parking mechanism can be reduced to meet the parking braking torque requirements. Similarly, the parking lever can also be adjusted to adapt to different structural layout spaces.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hub motor parking mechanism, characterized in that, It includes a base (1), a locking plate (2), a chuck (3), and a linear push-pull mechanism (4), wherein, The base (1) is fixed on the side of the hub motor that does not rotate with the wheel; The locking disc (2) is rotatably disposed in the base (1) and fixed to the rotating shaft of the hub motor. The locking disc (2) includes a protrusion (21) which is offset from the axis of the rotating shaft of the hub motor. There are two claws (3) arranged opposite each other. The opposite ends of the two claws (3) are hinged to the base (1). The protrusion (21) selectively abuts against one of the two claws (3). The linear push-pull mechanism (4) is fixed inside the base (1) and has a linear movable end (41). The linear movable end (41) can move along the diameter direction of the hub motor shaft and is flexibly connected to the two claws (3). The linear movable end (41) is used to push at least one of the two claws (3) closer to or away from the locking disc (2). When one of the two said claws (3) abuts against the protrusion (21), the claw (3) prevents the protrusion (21) from moving toward the abutting side, and the linear movable end (41) selectively pushes the other claw (3) away from the locking disc (2). The parking mechanism includes a parking state, a parking pre-release state, and a parking release state; When the vehicle starts on a slope, the parking mechanism switches from the parking state to the parking preparation release state, and then to the parking release state; among these, When the vehicle is in the parking state, both of the claws (3) are in contact with the locking disc (2), and the protrusion (21) is located between the two claws (3). The parking state can be switched to the parking preparation release state or the parking release state. When the parking is ready to be released, one of the two claws (3) abuts against the protrusion (21), and the other claw (3) leaves the locking disc (2). The parking ready to be released state can be switched to the parking state or the parking released state.

2. The hub motor parking mechanism as described in claim 1, characterized in that, It also includes a flexible connection component (5), which is fixed on the linear movable end (41) and is connected to the two claws (3) in a transmission manner.

3. The hub motor parking mechanism as described in claim 2, characterized in that, The flexible connection component (5) includes two first elastic elements (51), one end of each of the two first elastic elements (51) is disposed on the linear movable end (41), and the other end is disposed on the two claws (3) respectively.

4. The hub motor parking mechanism as described in claim 3, characterized in that, The flexible connection assembly (5) further includes a connecting seat (52) and two supports (53), wherein, The connecting seat (52) is fixed on the linear movable end (41); The two supports (53) are respectively hinged to the two ends of the connecting seat (52) and fixed to the two first elastic members (51).

5. The hub motor parking mechanism as described in claim 1, characterized in that, The claw (3) has an arc-shaped groove (31) on the side near the locking disc (2).

6. The hub motor parking mechanism as described in claim 1, characterized in that, It also includes a cover (6), one side of the base (1) is open, and the cover (6) is fixed to the open side of the base (1) to seal the opening of the base (1).

7. The hub motor parking mechanism as described in claim 1, characterized in that, The locking disc (2) further includes a connecting shaft (22) and a disc body (23), wherein, One end of the connecting shaft (22) extends to the outside of the base (1) and is fixed coaxially with the rotating shaft of the hub motor. The connecting shaft (22) is rotatably mounted on the base (1) through bearings. The disc body (23) is fixed on one end of the connecting shaft (22) located inside the base (1), and the protrusion (21) is fixed on the outside of the disc body (23).

8. The hub motor parking mechanism as described in claim 7, characterized in that, The number of the bumps (21) is multiple, and they are distributed in a ring around the connecting shaft (22) on the disk body (23).

9. The hub motor parking mechanism as described in claim 1, characterized in that, It also includes two second elastic elements (7), one end of each second elastic element (7) is disposed on two claws (3), and the other end is disposed on the base (1).

10. A method for parking a hub motor, characterized in that, Based on the hub motor and the parking mechanism according to any one of claims 1-9, the parking mechanism includes a parking state, a parking pre-release state, and a parking release state. When the vehicle is in motion, the parking mechanism is in the parking disengaged state; When the vehicle is parked on a slope, the parking mechanism switches from the parking release state to the parking state; When the vehicle starts on a slope, the parking mechanism switches from the parking state to the parking preparation release state, and then to the parking release state; among these, When the vehicle is in the parking state, both of the claws (3) are in contact with the locking disc (2), and the protrusion (21) is located between the two claws (3). The parking state can be switched to the parking preparation release state or the parking release state. When the parking is ready to be released, one of the two claws (3) abuts against the protrusion (21), and the other claw (3) leaves the locking disc (2). The parking ready to be released state can be switched to the parking state or the parking released state. When the parking is released, both of the claws (3) leave the locking disc (2), and the parking release state can be switched to the parking state.

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