Suspension system

Abstract

The utility model relates to the technical field of automobiles, and discloses a suspension system. The motor drives the first supporting assembly and the second supporting assembly to get close to or get away from each other in the axial direction of the suspension system through a lead screw and a lead screw nut of the lead screw nut assembly so as to adjust the deformation amount of the first elastic piece, and stepless adjustment of the rigidity of the suspension system can be achieved. In addition, the suspension system is simple in structure, and the cost can be reduced. Compared with the situation that the lead screw, the lead screw nut and the motor are distributed in the axial direction of the suspension system, the motor is provided with the first hollow cavity, the lead screw nut assembly is arranged in the first hollow cavity, the suspension system is compact in structure, and the size of the suspension system in the axial direction can be easily reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to a suspension system. BACKGROUND

[0002] The suspension system of an automobile is a device connecting the wheels and the body of the automobile, and its main functions are to support the weight of the vehicle, absorb and alleviate the impact of road unevenness, maintain the contact of the wheels with the ground, and improve the handling and comfort of the vehicle. The design of the suspension system directly affects the driving performance, comfort and safety of the vehicle. In the development process of automobile intelligence and electrification, as the user's scene demand changes, the traditional chassis suspension technology cannot balance the stability, safety and comfort of the vehicle, and the technical development of the line control suspension is imperative. The current suspension system structure is complex, which increases the risk of failure, has high cost, and the stiffness adjustment range of the current suspension system is limited. SUMMARY

[0003] The present application provides a suspension system which can simplify the structure of the suspension system and realize the infinite adjustment of the stiffness of the suspension system.

[0004] The present application provides a suspension system. The suspension system has an axial direction. The suspension system comprises a first support assembly configured to be connected to a body of a vehicle. The suspension system further comprises a second support assembly configured to be connected to a knuckle of the vehicle, and the first support assembly and the second support assembly are distributed along the axial direction. The suspension system further comprises a first elastic member supported between the first support assembly and the second support assembly in the axial direction. The suspension system further comprises an electric motor having a first hollow cavity and being suspended and fixed by the first support assembly, the electric motor comprising a stator assembly and a rotor assembly. The suspension system further comprises a screw nut assembly disposed in the first hollow cavity, the screw nut assembly comprising a screw rod and a screw nut, one of the screw rod and the screw nut being connected to the first support assembly and the other being connected to the second support assembly, and the screw nut being rotatably connected to an outer periphery of the screw rod; the electric motor is configured to drive the first support assembly and the second support assembly to move towards or away from each other along the axial direction through the screw rod and the screw nut, so as to adjust a deformation amount of the first elastic member.

[0005] In an embodiment of the present application, the stator assembly surrounds an outer periphery of the rotor assembly, and the rotor assembly surrounds the first hollow cavity inside.

[0006] In an embodiment of the present application, the screw rod and the screw nut move relatively along the axial direction in the first hollow cavity.

[0007] In an embodiment of the present application, the stator assembly comprises a stator and a stator support, and the stator is arranged on the stator support; and the rotor assembly comprises a rotor and a rotor support, and the rotor is arranged on the rotor support.

[0008] In an embodiment of the present application, the lead screw is arranged in the first hollow cavity, and the lead screw is fixedly connected with the rotor assembly; the lead screw nut is located between the lead screw and the rotor assembly, and the lead screw nut is fixedly connected with the second support assembly.

[0009] In an embodiment of the present application, the second support assembly comprises a second support frame for supporting the first elastic member, and a sleeve for being arranged concentrically with the lead screw nut and being fixedly connected.

[0010] In an embodiment of the present application, the suspension system further comprises a bellows dust cover connected with the stator assembly and the sleeve respectively, and the bellows dust cover is configured to shield the gap between the stator assembly and the sleeve in a manner of adapting to the deformation of the first elastic member.

[0011] In an embodiment of the present application, the suspension system further comprises a first bearing, and one end of the rotor assembly in the axial direction is rotatably connected with the first support assembly through the first bearing; and a second bearing, and the other end of the rotor assembly in the axial direction is rotatably connected with the stator assembly through the second bearing.

[0012] In an embodiment of the present application, the suspension system further comprises a locking mechanism arranged in one of the stator assembly and the rotor assembly, and the other of the stator assembly and the rotor assembly is provided with a matching structure, and the locking mechanism and the matching structure cooperate to limit the relative rotation between the stator assembly and the rotor assembly.

[0013] In an embodiment of the present application, the lead screw comprises a second hollow cavity, and the suspension system further comprises a connecting rod arranged in the second hollow cavity and fixedly connected with the first support assembly; and a shock absorber assembly fixedly connected with the second support assembly, and the shock absorber assembly and the connecting rod are connected through a damping assembly.

[0014] The present application has the following beneficial effects: Different from the prior art, the present application provides a suspension system. The motor of the present application drives the first support assembly and the second support assembly to move closer to or farther away from each other along the axial direction of the suspension system through the lead screw and the lead screw nut of the lead screw nut assembly, so as to adjust the deformation amount of the first elastic member, and the stepless adjustment of the stiffness of the suspension system can be realized. Moreover, the suspension system of the present application has simple structure, and the cost can be reduced. Compared with the case that the lead screw and the lead screw nut are distributed along the axial direction of the motor, the motor of the present application has a first hollow cavity, the lead screw nut assembly is arranged in the first hollow cavity, the suspension system has compact structure, and the size of the suspension system in the axial direction thereof can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and all other drawings obtained by those skilled in the art without creative effort based on these drawings also belong to the protection scope of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper", "lower", "left", "right" generally refer to the upper, lower, left and right of the device in the actual use or working state, and specifically refer to the direction of the drawing in the drawings.

[0016] Figure 1 is a structural schematic diagram of an embodiment of the suspension system of the present application;

[0017] Figure 2 is a structural schematic diagram of an embodiment of the locking mechanism of the present application.

[0018] Legend:

[0019] 10 suspension system; 11 first support assembly; 111 first support frame; 112 connecting body; 12 second support assembly; 121 second support frame; 122 sleeve; 13 first elastic member; 14 motor; 14a stator assembly; 14b rotor assembly; 141 stator; 142 rotor; 143 first hollow cavity; 144 stator support; 145 rotor support; 15 screw nut assembly; 151 screw rod; 152 screw nut; 153 second hollow cavity; 16 bellows type dust cover; 171 first bearing; 172 second bearing; 18 locking mechanism; 181 base; 182 electromagnetic coil; 183 static iron core; 184 dynamic iron core; 185 second elastic member; 186 locking hole; 191 connecting rod; 192 shock absorber assembly; 193 damping assembly. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely in the following description of the embodiments of the present application in combination with the drawings. Obviously, the described embodiments only represent some of the embodiments of the present application, and are not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort also belong to the protection scope of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper", "lower", "left", "right" generally refer to the upper, lower, left and right of the device in the actual use or working state, and specifically refer to the direction of the drawing in the drawings.

[0021] In the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "stacked" and other terms should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] The present application provides a suspension system, which is described in detail below. It should be noted that the sequence of the following embodiment descriptions does not limit the preferred sequence of the embodiments of the present application. Moreover, the description of each embodiment in the following embodiments has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0023] To solve the technical problems of complex structure and limited stiffness adjustment range of the suspension system in the prior art, an embodiment of the present application provides a suspension system. The suspension system has an axial direction. The suspension system comprises a first support assembly configured to be connected to a vehicle body of a vehicle. The suspension system further comprises a second support assembly configured to be connected to a steering knuckle of the vehicle, and the first support assembly and the second support assembly are distributed along the axial direction. The suspension system further comprises a first elastic member supported between the first support assembly and the second support assembly in the axial direction. The suspension system further comprises an electric motor having a first hollow cavity and being suspendedly fixed by the first support assembly, the electric motor comprising a stator assembly and a rotor assembly. The suspension system further comprises a screw nut assembly disposed in the first hollow cavity, the screw nut assembly comprising a screw rod and a screw nut, one of the screw rod and the screw nut being connected to the first support assembly and the other being connected to the second support assembly, and the screw nut being rotatably connected to the outer periphery of the screw rod; the electric motor is configured to drive the first support assembly and the second support assembly to move towards or away from each other along the axial direction through the screw rod and the screw nut, so as to adjust the deformation amount of the first elastic member. Details are described below.

[0024] Please refer to Figure 1 , Figure 1 is a structural schematic diagram of an embodiment of the suspension system of the present application.

[0025] In an embodiment, the suspension system 10 has an axial direction X. The suspension system 10 comprises a first support assembly 11 configured to be connected to a body of a vehicle. The suspension system 10 further comprises a second support assembly 12 configured to be connected to a knuckle of the vehicle, and further connected to a wheel of the vehicle. The first support assembly 11 and the second support assembly 12 are distributed along the axial direction X. The suspension system 10 further comprises a first elastic member 13 supported between the first support assembly 11 and the second support assembly 12 along the axial direction X. The suspension system 10 further comprises an electric motor 14 suspendedly fixed by the first support assembly 11, the electric motor 14 comprising a stator assembly 14a and a rotor assembly 14b. The suspension system 10 further comprises a screw-nut assembly 15 comprising a screw rod 151 and a screw nut 152, one of the screw rod 151 and the screw nut 152 being connected to the first support assembly 11, and the other being connected to the second support assembly 12, the screw nut 152 being rotatably connected to an outer periphery of the screw rod 151. The electric motor 14 is configured to drive the first support assembly 11 and the second support assembly 12 to move towards or away from each other along the axial direction X by the screw rod 151 and the screw nut 152, so as to adjust a deformation amount of the first elastic member 13.

[0026] In this way, the electric motor 14 can actively adjust the deformation amount of the first elastic member 13 in the whole stroke, and the stiffness of the suspension system 10 can be infinitely adjusted. The electric motor 14 is used to electrically adjust the deformation amount of the first elastic member 13, which has the advantages of fast response speed and high precision. The suspension system 10 has a simple structure and does not have complex hydraulic and pneumatic systems, which can reduce the cost and noise.

[0027] In an embodiment, the electric motor 14 has a first hollow cavity 143, and the screw-nut assembly 15 is arranged in the first hollow cavity 143. Specifically, the screw rod 151 and the screw nut 152 move relative to each other along the axial direction X in the first hollow cavity 143. In this way, compared with the case that the screw rod 151 and the screw nut 152 are distributed along the axial direction X of the suspension system 10 together with the electric motor 14, the suspension system 10 has a compact structure, which is conducive to reducing the size of the suspension system 10 along the axial direction X.

[0028] In an embodiment, the stator assembly 14a surrounds an outer periphery of the rotor assembly 14b, and the rotor assembly 14b surrounds the first hollow cavity 143 in the inside thereof. The stator assembly 14a comprises a stator 141 and a stator support 144, and the stator 141 is arranged on the stator support 144. The rotor assembly 14b comprises a rotor 142 and a rotor support 145, and the rotor 142 is arranged on the rotor support 145.

[0029] The stator 141 and the rotor 142 are connected to the first support assembly 11, and the stator 141 surrounds the outer periphery of the rotor 142. The rotor 142 has a first hollow cavity 143 formed in the interior thereof. A stator support 144 surrounds the outer periphery of the rotor 142, and the stator 141 is disposed on the stator support 144. The stator support 144 is connected to the first support assembly 11. A rotor support 145 surrounds the outer periphery of the first hollow cavity 143, and the rotor 142 is disposed on the rotor support 145. A lead screw 151 is disposed in the first hollow cavity 143, and the lead screw 151 is fixedly connected to the rotor assembly 14b (i.e., the rotor support 145). A lead screw nut 152 is located between the lead screw 151 and the rotor assembly 14b (i.e., the rotor support 145), and the lead screw nut 152 is fixedly connected to the second support assembly 12.

[0030] With the rotation of the rotor 142, the rotor 142 drives the lead screw 151 to rotate through the rotor support 145. Since the lead screw nut 152 is rotatably connected to the outer periphery of the lead screw 151, the rotation of the lead screw 151 can drive the lead screw nut 152 to move along the lead screw 151, so as to drive the second support assembly 12 to move along the axial direction X of the suspension system 10 through the lead screw nut 152, thereby realizing the mutual approach or separation of the first support assembly 11 and the second support assembly 12 along the axial direction X of the suspension system 10, so as to adjust the deformation amount of the first elastic member 13.

[0031] Of course, in other embodiments of the present application, the connection between the lead screw 151 and the rotor support 145 and the connection between the lead screw nut 152 and the second support assembly 12 are not limited to the above, and for example, the lead screw 151 can be connected to the second support assembly 12, and the lead screw nut 152 can be connected to the rotor support 145, which is not limited herein.

[0032] In an embodiment, the first support assembly 11 includes a first support frame 111 and a connecting body 112. The first elastic member 13 is supported between the first support frame 111 and the second support assembly 12 in the axial direction X. The connecting body 112 is disposed on the side of the first support frame 111 away from the second support assembly 12, and the connecting body 112 is used to be connected to the vehicle body. The stator support 144 is connected to the side of the first support frame 111 facing the second support assembly 12.

[0033] In an embodiment, the suspension system 10 further comprises a first bearing 171. The rotor assembly 14b (i.e. the rotor support 145) is rotatably connected to the first support assembly 11 at one end thereof in the axial direction X via the first bearing 171. Specifically, the rotor support 145 is rotatably connected to the stator support 144 at an end thereof close to the first support frame 111 in the axial direction X via the first bearing 171. The lead screw 151 and the rotor support 145 can be fixedly connected between the ends thereof close to the first support frame 111 in the axial direction X via a locking nut or the like fastener, such that the lead screw 151 can rotate synchronously with the rotor support 145. The suspension system 10 further comprises a second bearing 172. The rotor assembly 14b (i.e. the rotor support 145) is rotatably connected to the stator support 144 at the other end thereof in the axial direction X via the second bearing 172. The first bearing 171 and the second bearing 172 are further configured to support the bidirectional force of the lead screw 151.

[0034] In an embodiment, the second support assembly 12 comprises a second support frame 121 and a sleeve 122. The second support frame 121 is configured to support the first elastic member 13, which is supported between the first support assembly 11 and the second support frame 121. The sleeve 122 is configured to be concentrically arranged with and fixedly connected to the lead screw nut 152. The sleeve 122 is arranged on a side of the second support frame 121 facing the first support assembly 11, and is fixedly connected to the lead screw nut 152.

[0035] With the rotation of the rotor 142, the rotor 142 drives the lead screw 151 to rotate via the rotor support 145. Since the lead screw nut 152 is rotatably connected to the outer periphery of the lead screw 151, the rotation of the lead screw 151 drives the lead screw nut 152 to move along the lead screw 151, and the lead screw nut 152 drives the second support frame 121 to move along the axial direction X of the suspension system 10 via the sleeve 122, so as to adjust the mutual approach or separation of the first support frame 111 and the second support frame 121 along the axial direction X of the suspension system 10, and to adjust the deformation amount of the first elastic member 13.

[0036] It should be noted that the first elastic member 13 can be an elastic element such as a spring, and the first elastic member 13 is arranged around the outer periphery of the stator support 144 and the sleeve 122.

[0037] Further, the suspension system 10 further comprises a bellows dust cover 16 connected with the stator assembly 14a (i.e. the stator support 144) and the sleeve 122 respectively, and the bellows dust cover 16 is configured to shield the gap between the stator assembly 14a (i.e. the stator support 144) and the sleeve 122 in a manner of adapting the deformation of the first elastic member 13. Since the lead screw 151 is arranged in the first hollow cavity 143 surrounded by the rotor support 145, the sleeve 122 enters the first hollow cavity 143 along with the lead screw nut 152. In the direction perpendicular to the axial direction X of the suspension system 10, a gap is formed between the stator support 144 and the sleeve 122, which exposes the first hollow cavity 143. Therefore, the embodiment shields the gap between the stator support 144 and the sleeve 122 by arranging the bellows dust cover 16, so as to prevent external impurities from entering the gap between the stator support 144 and the sleeve 122, thereby avoiding the impurities affecting the stability of the cooperation between the lead screw 151 and the lead screw nut 152.

[0038] In an embodiment, the lead screw 151 comprises a second hollow cavity 153. The suspension system 10 further comprises a connecting rod 191 and a shock absorber assembly 192. The connecting rod 191 is arranged in the second hollow cavity 153, and the connecting rod 191 is fixedly connected with the first support assembly 11. The shock absorber assembly 192 is fixedly connected with the second support assembly 12, and the shock absorber assembly 192 and the connecting rod 191 are connected through a damping assembly 193. The shock absorber assembly 192 and the damping assembly 193 of the embodiment cooperate with the motor 14 to buffer the impact force, so as to reduce the load of the motor 14, which is conducive to ensuring the stability of the suspension system 10. Moreover, the shock absorber assembly 192, the first elastic member 13 and the motor 14 of the embodiment are coaxially integrated, which has the advantage of compact structure.

[0039] Specifically, the sleeve 122 is a hollow structure, and the end of the sleeve 122 away from the second support frame 121 is connected with the lead screw nut 152. During the movement of the lead screw nut 152 along the lead screw 151, the lead screw 151 is allowed to be embedded in the inside of the sleeve 122. The lead screw 151 is also a hollow structure, the connecting rod 191 is fixedly connected with the first support frame 111, and the connecting rod 191 is located in the inside of the lead screw 151. The shock absorber assembly 192 is fixedly connected with the second support frame 121, and the shock absorber assembly 192 passes through the second support frame 121 and the sleeve 122 to enter the inside of the lead screw 151, so as to be connected with the connecting rod 191 through the damping assembly 193.

[0040] Please refer to Figure 2 , Figure 2 is a structural schematic diagram of an embodiment of the locking mechanism of the present application.

[0041] In an embodiment, the suspension system 10 further comprises a locking mechanism 18. The locking mechanism 18 is arranged in one of the stator assembly 14a and the rotor assembly 14b, and the other of the stator assembly 14a and the rotor assembly 14b is arranged with a cooperating structure. The locking mechanism 18 and the cooperating structure cooperate to limit the relative rotation between the stator assembly 14a and the rotor assembly 14b. When the locking mechanism 18 and the cooperating structure cooperate to limit the relative rotation between the stator assembly 14a and the rotor assembly 14b, the current attitude of the vehicle body can be maintained, especially when the vehicle is parked on uneven road surface.

[0042] For example, the locking mechanism 18 is arranged in the stator bracket 144, and the rotor bracket 145 is arranged with the cooperating structure. The locking mechanism 18 comprises a base 181, an electromagnetic coil 182, a static core 183, and a dynamic core 184. The base 181 is fixed to the stator bracket 144, the electromagnetic coil 182 is arranged in the base 181, the static core 183 is arranged in the base 181, and the dynamic core 184 is connected with the static core 183 via a second elastic member 185. The cooperating structure comprises a plurality of locking holes 186 which are spaced apart along the circumference of the rotor bracket 145. The second elastic member 185 is configured to drive the dynamic core 184 to be embedded in the locking hole 186 when the electromagnetic coil 182 is not energized, so as to limit the relative rotation between the stator bracket 144 and the rotor bracket 145; and the electromagnetic coil 182 is configured to generate electromagnetic force when it is energized, so that the static core 183 attracts the dynamic core 184 to be out of the locking hole 186.

[0043] The second elastic member 185 can be an elastic element such as a spring. When the electromagnetic coil 182 is not energized, the elastic restoring force provided by the second elastic member 185 drives the dynamic core 184 to extend out, so that the dynamic core 184 is embedded in the locking hole 186, thereby limiting the relative rotation between the stator bracket 144 and the rotor bracket 145, and maintaining the current attitude of the vehicle body. Compared with the case where the motor 14 is controlled to maintain the attitude of the vehicle body through the screw rod 151 and the screw nut 152, in the embodiment, the dynamic core 184 is embedded in the locking hole 186 when the electromagnetic coil 182 is not energized, so as to limit the relative rotation between the stator bracket 144 and the rotor bracket 145, thereby providing rigid support for the vehicle without additional energy input, without energy loss, and facilitating reduction of the energy consumption of the entire suspension system 10. When the electromagnetic coil 182 is energized, the electromagnetic force is generated, so that the static core 183 attracts the dynamic core 184 to be out of the locking hole 186, thereby allowing the relative rotation between the stator bracket 144 and the rotor bracket 145, and at this time, the dynamic core 184 compresses the second elastic member 185.

[0044] In summary, the application provides a suspension system. The motor drives the first support assembly and the second support assembly to move closer to or away from each other along the axial direction of the suspension system through the lead screw and the lead screw nut of the lead screw nut assembly, so as to adjust the deformation amount of the first elastic member, and the stepless adjustment of the stiffness of the suspension system can be realized. Moreover, the suspension system has simple structure and can reduce the cost. Compared with the case that the lead screw, the lead screw nut and the motor are distributed along the axial direction of the suspension system, the motor has a first hollow cavity, the lead screw nut assembly is arranged in the first hollow cavity, the suspension system has compact structure, and the size of the suspension system in the axial direction can be reduced.

[0045] The suspension system provided by the application is described in detail above, and the principles and implementation manners of the application are described by using specific examples. The above description of the examples is only used to help understand the method of the application and its core idea; meanwhile, for those skilled in the art, the specific implementation manners and application ranges can be changed according to the idea of the application, and the content of the description should not be understood as a limitation on the application.

Claims

1. A suspension system characterized by, The suspension system has an axial direction, and comprises: a first support assembly configured to be connected to a vehicle body; a second support assembly configured to be connected to a steering knuckle of the vehicle, and the first support assembly and the second support assembly are distributed along the axial direction; a first elastic member supported between the first support assembly and the second support assembly along the axial direction; a motor having a first hollow cavity and being suspendedly fixed by the first support assembly, the motor comprising a stator assembly and a rotor assembly; a screw-nut assembly arranged in the first hollow cavity, the screw-nut assembly comprising a screw rod and a screw nut, one of the screw rod and the screw nut is connected to the first support assembly, and the other is connected to the second support assembly, and the screw nut is rotatably connected to the outer periphery of the screw rod; the motor is configured to drive the first support assembly and the second support assembly to move towards or away from each other along the axial direction through the screw rod and the screw nut, so as to adjust the deformation amount of the first elastic member.

2. The suspension system according to claim 1, wherein the stator assembly surrounds the outer periphery of the rotor assembly, and the rotor assembly surrounds the first hollow cavity inside.

3. The suspension system according to claim 1, wherein the screw rod and the screw nut move relatively along the axial direction in the first hollow cavity.

4. The suspension system according to claim 1, wherein the stator assembly comprises a stator and a stator support, and the stator is arranged in the stator support; and the rotor assembly comprises a rotor and a rotor support, and the rotor is arranged in the rotor support.

5. The suspension system according to claim 1, wherein the screw rod is arranged in the first hollow cavity and fixedly connected with the rotor assembly, and the screw nut is located between the screw rod and the rotor assembly and fixedly connected with the second support assembly.

6. The suspension system according to claim 1, wherein the second support assembly comprises: a second support frame configured to support the first elastic member; and a sleeve configured to be concentrically arranged with and fixedly connected with the screw nut.

7. The suspension system according to claim 6, further comprising: a bellows dust cover connected with the stator assembly and the sleeve respectively, and the bellows dust cover is configured to shield the gap between the stator assembly and the sleeve in a manner suitable for the deformation of the first elastic member.

8. The suspension system according to claim 1, further comprising: a first bearing, one end of the rotor assembly is rotatably connected with the first support assembly through the first bearing along the axial direction; and a second bearing, the other end of the rotor assembly is rotatably connected with the stator assembly through the second bearing along the axial direction.

9. The suspension system according to claim 1, wherein ​ ​ The suspension system further comprises a locking mechanism arranged on one of the stator assembly and the rotor assembly, and the other of the stator assembly and the rotor assembly is provided with a matching structure, the locking mechanism and the matching structure cooperate to limit the relative rotation between the stator assembly and the rotor assembly.

10. The suspension system according to any one of claims 1 to 9, characterized in that, The lead screw comprises a second hollow cavity, and the suspension system further comprises: a connecting rod arranged in the second hollow cavity and fixedly connected with the first support assembly; and a shock absorber assembly fixedly connected with the second support assembly, and the shock absorber assembly and the connecting rod are connected through a damping assembly.

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