Wheel rotating system and vehicle with same

Abstract

The utility model discloses a wheel rotating system and a vehicle with the same, the wheel rotating system comprises a wheel steering system and a wheel rotating assembly, the wheel steering system comprises a transmission mechanism, a steering tie rod and a wheel assembly, and the transmission mechanism drives the wheel assembly to steer through the steering tie rod; the wheel rotating assembly is provided with a fixed end and a pushing end, the fixed end is used for being connected with the front portion of a vehicle body, the size of the pushing end in the vertical direction is larger than that of the steering tie rod in the vertical direction, the wheel rotating assembly is arranged on the front side of the steering tie rod, and in the front-back direction, the projection of the pushing end and the projection of the steering tie rod are partially overlapped. When the front portion of the vehicle body deforms backwards, the steering tie rod is pushed to deform so as to drive the rear end of the wheel assembly to rotate outwards. Therefore, the wheel rotating system can reduce the influence of the wheel assembly on the invasion amount of the passenger compartment and the influence of the wheel assembly on the crushing of the longitudinal beam.

Description

Technical Field

[0001] The utility model relates to the technical field of wheels, in particular to a wheel rotation system and a vehicle having the same. Background Art

[0002] During a frontal collision, the most ideal collision effect is that the longitudinal beam of the vehicle body in front of the front bulkhead can be completely crushed to absorb all the collision energy, so that the passenger compartment does not deform to protect the passengers from being injured. However, as the main component on the frontal collision force transmission path, the wheel (consisting of a tire and a wheel hub) cannot deform and absorb energy. On the one hand, it will affect the crushing deformation of the longitudinal beam corresponding to the wheel. On the other hand, the wheel will have a relatively strong impact on the A-pillar sill area, resulting in a large intrusion amount of the A-pillar, sill and front bulkhead of the passenger compartment, driving the instrument panel to move backward and affecting the safety of the driver and passengers. Especially for short-nose vehicles, due to the short energy absorption area, the wheel will further affect the intrusion amount of the passenger compartment and the crushing of the rear part of the longitudinal beam. Content of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a wheel rotation system and a vehicle having the same, and the wheel rotation system can reduce the influence of the wheel assembly on the intrusion amount of the passenger compartment and the influence on the crushing of the longitudinal beam.

[0004] The present application further provides a vehicle adopting the above wheel rotation system.

[0005] According to the wheel rotation system of the first aspect embodiment of the present application, it includes: a wheel steering system, the wheel steering system includes a transmission mechanism, a steering tie rod and a wheel assembly, and the transmission mechanism drives the wheel assembly to turn through the steering tie rod; a wheel rotation assembly, the wheel rotation assembly has a fixed end and a pushing end, the fixed end is used to be connected to the front part of the vehicle body, the size of the pushing end in the up-down direction is greater than the size of the steering tie rod in the up-down direction, the wheel rotation assembly is arranged on the front side of the steering tie rod, and in the front-back direction, the projection of the pushing end overlaps with the projection of the steering tie rod in part, so as to drive the steering tie rod to deform to drive the rear end of the wheel assembly to rotate outwards during the process of the front part of the vehicle body deforming backward.

[0006] According to the wheel rotation system of the embodiments of the present application, by providing a wheel rotation assembly, the fixed end of the wheel rotation assembly is connected to the front part of the vehicle body. During the process of the rearward deformation of the front part of the vehicle body, the pushing end of the wheel rotation assembly pushes the steering tie rod to deform so as to drive the rear end of the wheel assembly to rotate outward. Thereby, the influence of the wheel assembly on the crushing of the longitudinal beam of the vehicle frame in front of the front apron and the influence of the wheel assembly on the intrusion amount of the occupant compartment can be reduced. At the same time, the dimension of the pushing end in the up-down direction is larger than the dimension of the steering tie rod in the up-down direction. When the pushing end moves backward and deflects within a certain range in the up-down direction, the pushing end can still contact and abut against the steering tie rod so that the steering tie rod can deform and drive the rear end of the wheel assembly to rotate outward. In summary, the present application can realize the rotation of the wheel assembly when the vehicle has a frontal collision, and has good collision consistency, simple structure, is easy to implement, and has low development cost.

[0007] In some embodiments, the wheel rotation assembly includes a connecting member and a pushing member connected to each other. The front end of the connecting member is the fixed end, the pushing member is connected to the rear end of the connecting member, and the dimension of the pushing member in the up-down direction is larger than the dimension of the connecting member in the up-down direction.

[0008] In some embodiments, the middle part of the pushing member in the up-down direction is connected to the connecting member.

[0009] In some embodiments, the length direction of the pushing member extends along the up-down direction.

[0010] In some embodiments, in the up-down direction, the middle part of the pushing member is located on the front side of the end part of the pushing member, and the steering tie rod is located between the two end parts of the pushing member.

[0011] In some embodiments, the end of the steering tie rod far from the wheel assembly is the inner end, the end of the steering tie rod close to the wheel assembly is the outer end, and the distance between the pushing end and the inner end is less than the distance between the pushing end and the outer end.

[0012] In some embodiments, there are two wheel rotation assemblies and two steering tie rods. Both of the two steering tie rods are connected to the transmission mechanism, and the two wheel rotation assemblies are respectively arranged on the front sides of the two steering tie rods.

[0013] A vehicle according to the second aspect embodiment of the present application includes the wheel rotation system described in the above embodiments.

[0014] In some embodiments, the distance between the pushing end and the steering tie rod in the front-rear direction is L1, and the distance between the fixed end and the rigid member of the front part of the vehicle is L2, where 0≤L1<L2.

[0015] In some embodiments, the front part of the vehicle body has a front anti-collision beam and a radiator grille frame, and the fixed end is connected to the front anti-collision beam or the bottom of the radiator grille frame.

[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings

[0017] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0018] Figure 1 is a schematic structural view of a wheel rotation system according to an embodiment of the present application, in which it is shown that the wheel does not rotate;

[0019] Figure 2 is a top view of the wheel rotation system according to an embodiment of the present application;

[0020] Figure 3 is a schematic structural view of the wheel rotation system according to an embodiment of the present application, in which it is shown that the wheel rotates;

[0021] Figure 4 is a side view of a wheel rotation assembly and a tie rod in the wheel rotation system according to an embodiment of the present application;

[0022] Figure 5 is a simulation analysis diagram of the intrusion amount of the front bulkhead after a frontal collision of a vehicle without a wheel rotation system;

[0023] Figure 6 is a simulation analysis diagram of the intrusion amount of the front bulkhead after a frontal collision of a vehicle provided with the wheel rotation system according to an embodiment of the present application.

[0024] Reference Signs:

[0025] Wheel rotation system 100;

[0026] Wheel steering system 10;

[0027] Transmission mechanism 101; Tie rod 102; Inner end 1021; Outer end 1022;

[0028] Wheel assembly 103;

[0029] Wheel rotation assembly 20;

[0030] Fixed end 201; Pushing end 202; Connecting member 203; Pushing member 204. Detailed Description of the Embodiments

[0031] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0032] Reference will be made below to Figures 1-6 describe a wheel rotation system 100 and a vehicle according to an embodiment of the present utility model.

[0033] As Figures 1-4 shown, the wheel rotation system 100 according to an embodiment of the first aspect of the present application includes a wheel steering system 10 and a wheel rotation assembly 20. The wheel steering system 10 includes a transmission mechanism 101, a steering tie rod 102, and a wheel assembly 103. The transmission mechanism 101 drives the wheel assembly 103 to turn through the steering tie rod 102; the wheel rotation assembly 20 has a fixed end 201 and a pushing end 202. The fixed end 201 is used to be connected to the front part of the vehicle body. The size of the pushing end 202 in the up-down direction is larger than the size of the steering tie rod 102 in the up-down direction. The wheel rotation assembly 20 is disposed on the front side of the steering tie rod 102. In the front-back direction, the projection of the pushing end 202 overlaps with the projection of the steering tie rod 102 partially, so as to drive the steering tie rod 102 to deform to drive the rear end of the wheel assembly 103 to turn outwards during the process of the front part of the vehicle body deforming backwards.

[0034] Specifically, the transmission mechanism 101 is used to convert the rotational motion input to the transmission mechanism 101 into a linear motion, so that the output end of the transmission mechanism 101 can drive the steering tie rod 102 to move, and then drive the wheel assembly 103 to turn. For example, torque can be input to the transmission mechanism 101 through a steering wheel, or other rotational output mechanisms can be used to input torque to the transmission mechanism 101. For example, the transmission mechanism 101 can be a rack and pinion steering gear.

[0035] When a vehicle has a frontal collision, mainly the front part of the vehicle body deforms after being impacted. Therefore, the fixed end 201 is connected to the front part of the vehicle body, so that the front part of the vehicle body can drive the wheel rotation assembly 20 to move backwards after deforming. The front part of the vehicle body refers to the part of the vehicle located on the front side of the vehicle front bulkhead. For example, the fixed end 201 can be connected to the front bumper beam of the front part of the vehicle body or the bottom of the radiator grille of the front part of the vehicle body.

[0036] The wheel rotation assembly 20 is provided on the front side of the tie rod 102. In the front-rear direction, the projection of the pushing end 202 overlaps with the projection of the tie rod 102. So that during the backward movement of the wheel rotation assembly 20, it can contact and press the tie rod 102, causing the tie rod 102 to deform. During the deformation of the tie rod 102, the end of the tie rod 102 connected to the wheel assembly 102 will move, thereby driving the wheel assembly 10 to rotate, causing the rear end of the wheel assembly 10 to rotate outward, so as to reduce the impact of the wheel assembly 103 on the vehicle body longitudinal beam in front of the front apron; and reduce the impact degree of the wheel assembly 103 on the vehicle A-pillar sill area, reduce the intrusion amount generated by the A-pillar, sill and front apron, and further reduce the moving distance of the instrument panel moving backward. That is, the wheel rotation system 100 of the present application can reduce the impact of the intrusion amount of the wheel assembly 103 on the occupant compartment.

[0037] It should be noted that when a vehicle has a frontal collision and the front part of the vehicle body deforms backward, pushing the wheel rotation assembly 20 to move backward, the pushing end 202 of the wheel rotation assembly 20 may not move completely along the vertically backward path and may deviate. At the same time, since the tie rod 102 usually extends left and right, even if the pushing end 202 deviates in the left-right direction, the tie rod 102 is still relatively easy to contact and abut against the tie rod 102. However, if the pushing end 202 deviates in the up-down direction, the pushing end 202 may not be able to contact the tie rod 102, resulting in the failure of the wheel rotation assembly 20.

[0038] In the embodiment of the present application, the size of the pushing end 202 in the up-down direction is larger than the size of the tie rod 102 in the up-down direction. Therefore, when the pushing end 202 moves backward and deviates within a certain range in the up-down direction, the pushing end 202 can still fully contact and abut against the tie rod 102, so that the tie rod 102 can deform and drive the rear end of the wheel assembly 103 to rotate outward, thereby improving the use reliability of the wheel rotation assembly 20. At the same time, since the pushing end 202 is not connected to the tie rod 102, the number of components can be reduced, as well as the impact of the wheel rotation assembly 20 on the normal use process of the tie rod 102.

[0039] The present application makes a simulation analysis of the intrusion amount of the front apron after a frontal collision for a vehicle without the wheel rotation system 100 and a vehicle with the wheel rotation system 100. As Figure 5 and Figure 6 shown, Figure 5 is a simulation analysis diagram of the intrusion amount of the front apron after a frontal collision for a vehicle without the wheel rotation system 100. Figure 6The simulation analysis diagram of the intrusion amount of the front bulkhead after a frontal collision of a vehicle equipped with the wheel rotation system 100. Compare Figure 5 and Figure 6 It can be seen that after the wheel rotation system 100 of the present application is set, the intrusion amount of the front bulkhead of the vehicle is significantly reduced, and the intrusion area is also significantly reduced.

[0040] According to the wheel rotation system 100 of the embodiment of the present invention, by setting the wheel rotation assembly 20, the fixed end 201 of the wheel rotation assembly 20 is connected to the front part of the vehicle body. During the process of the front part of the vehicle body deforming backward, the pushing end 202 of the wheel rotation assembly 20 pushes the steering tie rod 102 to deform, so as to drive the rear end of the wheel assembly 103 to rotate outward, thereby reducing the influence of the wheel assembly 103 on the crushing of the longitudinal beam of the frame in front of the front bulkhead and reducing the influence of the wheel assembly 103 on the intrusion amount of the passenger compartment; at the same time, the size of the pushing end 202 in the up and down direction is larger than the size of the steering tie rod 102 in the up and down direction. When the pushing end 202 moves backward and deflects within a certain range in the up and down direction, the pushing end 202 can still contact and abut against the steering tie rod 102, so that the steering tie rod 102 can deform and drive the rear end of the wheel assembly 103 to rotate outward. In summary, the present application can realize the rotation of the wheel assembly when the vehicle has a frontal collision, and has good collision consistency, simple structure, easy to implement, and low development cost.

[0041] According to some embodiments of the present invention, reference can be made to Figures 1 to 4 such that the size of the pushing end 202 in the up and down direction is larger than the size of the rest of the wheel rotation assembly 20 in the up and down direction. In this way, on the one hand, the possibility of the pushing end 202 contacting the steering tie rod 102 during the backward movement can be increased; on the other hand, the size of the rest of the wheel rotation assembly 20 in the up and down direction can also be smaller, so as to reduce the possibility of interference between the wheel rotation assembly 20 and other components in the front part of the vehicle.

[0042] According to some embodiments of the present invention, reference can be made to Figures 1 to 4 such that the wheel rotation assembly 20 includes a connected connecting member 203 and a pushing member 204. The front end of the connecting member 203 is the fixed end 201, the pushing member 204 is connected to the rear end of the connecting member 203, and the size of the pushing member 204 in the up and down direction is larger than the size of the connecting member 203 in the up and down direction.

[0043] Exemplarily, the connecting member 203 may be a connecting plate or a connecting rod, etc., and the connecting member 203 may be a straight rod or a curved rod. The pushing member 204 may be a pushing plate or a pushing rod, etc., and the pushing member 204 may be a straight rod or a curved rod. The connecting member 203 and the pushing member 204 may be fixedly connected, such as by welding; or may be detachably connected, such as by threading. Both the connecting member 203 and the pushing member 204 are rigid members, so that when the steering tie rod 102 is pushed to deform, the connecting member 203 and the pushing member 204 will not be greatly deformed.

[0044] The connecting member 203 connects the pusher 204 and the front part of the vehicle body. The connecting member 203 has a small size in the vertical direction so as to avoid other components in the front part of the vehicle. The pusher 204 has a large size in the vertical direction so as to make sure that the pusher 204 can still fully contact and resist the steering tie rod 102 when a certain degree of vertical displacement occurs during the backward movement of the pusher 204, so as to drive the steering tie rod 102 to deform.

[0045] According to some embodiments of the present invention, reference can be made to Figures 1 to 4 The pushing member 204 is connected to the connecting member 203 in the middle in the up and down direction.

[0046] In this way, the overall structure of the wheel rotating assembly 20 formed by the pushing member 204 and the connecting member 203 is more stable. When the pushing member 204 squeezes the steering tie rod 102, the pushing member 204 is subjected to a smaller torque, and deformation and breakage are less likely to occur between the connecting member 203 and the pushing member 204.

[0047] In some embodiments, in the initial state, that is, when the vehicle has not experienced a head-on collision, in the front-to-back direction, the projection of the middle portion of the pusher 204 partially overlaps with the projection of the steering tie rod 102, so that the middle portion of the pusher 204 can push the steering tie rod 102. At the same time, when the pusher 204 is offset in the up-and-down direction, it is not easy to be completely misaligned with the steering tie rod 102 in the up-and-down direction.

[0048] According to some embodiments of the present invention, reference can be made to Figures 1 to 4 , the length direction of the push member 204 extends in the up-down direction. For example, the push member 204 is a push rod, and the central axis of the push rod extends in the up-down direction. In this way, the structure of the push member 204 is relatively simple, and it is convenient to process. Under the premise of the same size, the push member 204 can be offset in the up-down direction by a large distance.

[0049] According to some embodiments of the present invention, in the up-down direction, the middle portion of the pusher 204 is located in front of the ends of the pusher 204 , and the steering tie rod 102 is located between the ends of the pusher 204 .

[0050] Exemplarily, the pushing member 204 can be an arc-shaped pushing member. The opening of the arc-shaped pushing member faces the steering tie rod 102, and the middle part of the arc-shaped pushing member 204 in the up-down direction is opposite to the steering tie rod 102 in the front-back direction. Alternatively, exemplarily, the pushing member 204 includes a first piece and a second piece connected to each other. The first piece and the second piece are arranged at a set angle, and the opening of the angle formed by the first piece and the second piece faces the steering tie rod 102. The connection position of the first piece and the second piece is opposite to the steering tie rod 102 in the front-back direction.

[0051] In this way, after the steering tie rod 102 contacts the pushing member 204, it is easy to slide towards the middle part of the pushing member 204 and is not easy to separate from the pushing member 204, which is beneficial to reducing the possibility of failure of the wheel rotation system 100 of the present application.

[0052] According to some embodiments of the present invention, reference can be made to Figure 1 , one end of the steering tie rod 102 away from the wheel assembly 103 is the inner end 1021, and one end of the steering tie rod 102 close to the wheel assembly 103 is the outer end 1022. The distance between the pushing end 202 and the inner end 1021 is less than the distance between the pushing end 202 and the outer end 1022.

[0053] That is to say, the pushing end 202 is farther away from the wheel assembly 103. In this way, when the pushing end 202 pushes the steering tie rod 102, the torque at the wheel assembly 103 is greater, which is beneficial to increasing the rotation angle of the wheel assembly 103 when the pushing end 202 pushes the steering tie rod 102, thereby being beneficial to further reducing the influence of the wheel assembly 103 on the part of the longitudinal beam in front of the front apron and reducing the influence of the wheel assembly 103 on the intrusion amount of the occupant compartment. At the same time, the wheel rotation assembly 20 is not easy to interfere with the rotated wheel assembly 103, and the wheel rotation assembly 20 can move significantly in the front-back direction, which is beneficial to ensuring the use effect of the wheel rotation assembly 20.

[0054] According to some embodiments of the present invention, reference can be made to Figures 1 to 4 , there are two wheel rotation assemblies 20, and there are two steering tie rods 102. Both of the two steering tie rods 102 are connected to the transmission mechanism 101, and the two wheel rotation assemblies 20 are respectively arranged on the front sides of the two steering tie rods 102.

[0055] For example, the two tie rods 102 are respectively a left tie rod and a right tie rod. The left tie rod 102 is connected between the left wheel assembly 103 and the transmission mechanism 101, and the right tie rod is connected between the right wheel assembly 103 and the transmission mechanism 101. The two wheel rotation assemblies 20 are respectively used to push the left tie rod 102 to deform and push the right tie rod 102 to deform, so that the rear ends of the two wheel assemblies 103 can rotate outward simultaneously, so as to reduce the influence of the two wheel assemblies 103 on the crushing of the part of the longitudinal beam located in front of the front apron and reduce the influence of the wheel assembly 103 on the intrusion amount of the passenger compartment.

[0056] The vehicle according to the second aspect embodiment of the present application includes the wheel rotation system 100 in the above embodiment.

[0057] The vehicle according to the embodiment of the present application adopts the wheel rotation system 100 in the above embodiment, and the technical effects are the same as those of the above wheel rotation system 100, which will not be elaborated here.

[0058] According to some embodiments of the present invention, the distance between the pushing end 202 and the tie rod 102 in the front-rear direction is L1, and the distance between the fixed end 201 and the rigid member at the front of the vehicle is L2, where 0≤L1<L2.

[0059] The front part of the vehicle body includes the front part of the vehicle frame and the components arranged around the front part of the vehicle frame, such as the engine, water tank, compressor, motor, etc. It should be noted that the rigid member at the front of the vehicle body is the engine or the motor. The engine or the motor has a very high rigidity. When the vehicle undergoes a frontal collision, the engine or the motor is not easily deformed under the action of the collision force. That is to say, the extreme deformation (or crushing) position of the vehicle body at the front of the vehicle body during a frontal collision is at the rigid member. Since L1<L2, during the process of the vehicle body deforming to the extreme deformation position, the pushing end 202 can contact and squeeze the tie rod 102.

[0060] L1 can be equal to 0. That is to say, the pushing end 202 can also directly contact the tie rod 102 in the initial state or when the front end of the wheel assembly 103 faces directly forward, so that once the pushing end 202 starts to move backward, it can squeeze the tie rod 102. In this way, the response sensitivity of the wheel rotation system 100 is higher.

[0061] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0062] In the description of the present utility model, the "first feature" and the "second feature" may include one or more of such features.

[0063] In the description of the present utility model, the meaning of "a plurality of" is two or more.

[0064] In the description of the present utility model, that the first feature is "above" or "below" the second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but in contact through additional features therebetween.

[0065] In the description of the present utility model, that the first feature is "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature.

[0066] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0067] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A wheel rotation system, characterized in that: include: A wheel steering system, the wheel steering system comprising a transmission mechanism, a steering tie rod and a wheel assembly, wherein the transmission mechanism drives the wheel assembly to steer via the steering tie rod; A wheel rotating assembly, the wheel rotating assembly having a fixed end and a pushing end, the fixed end being used to be connected to the front part of the vehicle body, the pushing end having a size in the up-down direction being larger than the size of the steering tie rod in the up-down direction, the wheel rotating assembly being arranged at the front side of the steering tie rod, the projection of the pushing end partially overlapping with the projection of the steering tie rod in the front-to-back direction, so as to push the steering tie rod to deform during the process of the front part of the vehicle body deforming backward to drive the rear end of the wheel assembly to rotate outward.

2. The wheel rotation system according to claim 1, characterized in that: The wheel rotation assembly includes a connected connecting member and a pushing member, the front end of the connecting member is the fixed end, the pushing member is connected to the rear end of the connecting member, and the size of the pushing member in the up and down direction is larger than the size of the connecting member in the up and down direction.

3. The wheel rotation system according to claim 2, characterized in that: The middle part of the pushing member in the up-down direction is connected to the connecting member.

4. The wheel rotation system according to claim 2, characterized in that: The length direction of the pushing member extends along the up-down direction.

5. The wheel rotation system according to claim 2, characterized in that: In the up-down direction, the middle portion of the pusher is located in front of the end portion of the pusher, and the steering tie rod is located between the two end portions of the pusher.

6. The wheel rotation system according to claim 1, characterized in that: The end of the steering tie rod away from the wheel assembly is the inner end, the end of the steering tie rod close to the wheel assembly is the outer end, and the distance between the pushing end and the inner end is smaller than the distance between the pushing end and the outer end.

7. The wheel rotation system according to claim 2, characterized in that: There are two wheel rotation assemblies, two steering tie rods, both of which are connected to the transmission mechanism, and the two wheel rotation assemblies are respectively arranged at the front sides of the two steering tie rods.

8. A vehicle, characterized in that: Comprising a wheel rotation system according to any one of claims 1-7.

9. The vehicle according to claim 8, characterized in that The distance between the pushing end and the steering tie rod in the front-rear direction is L1, and the distance between the fixed end and the rigid component at the front of the vehicle is L2, 0≤L1<L2.

10. The vehicle according to claim 8, characterized in that The front part of the vehicle body is provided with a front anti-collision beam and a water tank frame, and the fixed end is connected to the front anti-collision beam or the bottom of the water tank frame.

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