Vehicle rear wheel steering system and vehicle

Abstract

The utility model provides a vehicle rear wheel steering system and a vehicle. The steering system comprises a rear auxiliary frame, a suspension assembly and a driving motor, wherein the rear auxiliary frame is provided with a driving shaft; the suspension assembly is connected with the rear auxiliary frame and a rear wheel of the vehicle. The driving motor is connected with the driving shaft and used for driving the rear auxiliary frame to rotate so that the rear auxiliary frame can drive the rear wheels to steer through the suspension assembly. The steering system provided by the utility model can improve the arrangement difficulty of the whole vehicle.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a steering system for rear wheels of a vehicle and a vehicle. Background Art

[0002] With the advancement and development of automobile technology, rear-wheel steering technology is widely used in medium and large passenger vehicles. The existing rear-wheel steering technology uses a rear-wheel steering gear that crosses the left and right sides to pull the steering knuckle to achieve rear-wheel steering, which is similar to the front-wheel steering system. This makes the layout of the vehicle difficult after adding the rear-wheel steering system. Utility Model Content

[0003] The present application provides a steering system for rear wheels of a vehicle and a vehicle, so as to improve the technical problem of difficulty in the layout of the entire vehicle.

[0004] The present application provides a steering system for the rear wheels of a vehicle, which includes a rear subframe, a suspension assembly and a drive motor, wherein the rear subframe is provided with a drive shaft; the suspension assembly is respectively connected to the rear subframe and the rear wheels of the vehicle; the drive motor is connected to the drive shaft and is used to drive the rear subframe to rotate, so that the rear subframe drives the rear wheels to steer through the suspension assembly.

[0005] The rear subframe includes a first frame and a second frame, the first frame is connected to the suspension assembly; the second frame is connected to the first frame and extends toward the top of the vehicle relative to the first frame; the second frame is connected to the drive shaft on the side away from the first frame.

[0006] The first skeleton includes a skeleton frame, the second skeleton includes a plurality of brackets, one end of the bracket is connected to the skeleton frame, and the other end of the bracket is connected to the driving shaft; the plurality of brackets are evenly arranged on the skeleton frame.

[0007] The bracket includes a first connecting part and a second connecting part, one end of the first connecting part is connected to the skeleton frame, and the end of the second connecting part away from the first connecting part is connected to the driving shaft; the first connecting part and the second connecting part are arranged to intersect.

[0008] The second frame and the driving shaft are integrally formed.

[0009] Wherein, the suspension assembly includes a connecting rod assembly, which is respectively connected to the first frame and the rear wheel.

[0010] Among them, the rear subframe also includes: a first mounting seat and a second mounting seat, which are respectively connected to the upper surfaces of the opposite sides of the skeleton frame, and are respectively connected to one end of the corresponding second skeleton bracket; the suspension assembly also includes two shock absorbing assemblies, which are respectively installed on the first mounting seat and the second mounting seat.

[0011] Among them, the rear-wheel steering system also includes a body floor, and the rear subframe is installed at the bottom of the body floor. The body floor is provided with a mounting groove and a mounting hole provided in the mounting groove. The drive motor is installed in the mounting groove, and the drive shaft part is located in the mounting hole.

[0012] The driving shaft is connected to the rotor of the driving motor to serve as a power output shaft.

[0013] The present application provides a vehicle, which includes the above-mentioned steering system.

[0014] The beneficial effects of the present application are as follows: the steering system provided by the present application includes a rear subframe, a suspension assembly and a drive motor, the rear subframe is provided with a drive shaft; the suspension assembly is respectively connected to the rear subframe and the rear wheels of the vehicle; the drive motor is connected to the drive shaft, and is used to drive the rear subframe to rotate, so that the rear subframe drives the rear wheels to steer through the suspension assembly. In the above manner, the steering system of the present application eliminates the setting of the steering gear on the whole vehicle, and by setting a drive shaft on the rear subframe, the drive motor drives the rear subframe to rotate through the drive shaft, and drives the rear wheels to steer through the suspension assembly. While achieving rear wheel steering, the structure of the steering system is simple, which can improve the difficulty of vehicle layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

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

[0017] Figure 2 yes Figure 1 An exploded schematic diagram of a steering system in an embodiment;

[0018] Figure 3 It is a structural schematic diagram of an embodiment of a rear subframe provided by the present application;

[0019] Figure 4 It is a structural schematic diagram of an embodiment of a vehicle body bottom plate provided by the present application;

[0020] Figure 5 It is a structural schematic diagram of a vehicle embodiment provided by the present application. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0024] The present application provides a steering system for the rear wheels of a vehicle, referring to Figure 1 to Figure 2 , Figure 1 is a structural schematic diagram of an embodiment of a steering system provided by the present application, Figure 2 yes Figure 1 An exploded schematic diagram of the steering system in the embodiment is shown in FIG. Figure 1 and Figure 2 As shown, the steering system 10 includes a rear subframe 110, a suspension assembly 120 and a drive motor 130. The rear subframe 110 is provided with a drive shaft 111. The suspension assembly 120 is connected to the rear subframe 110 and the rear wheels of the vehicle respectively. The drive motor 130 is connected to the drive shaft 111, and the drive motor 130 is used to drive the rear subframe 110 to rotate, so that the rear subframe 110 drives the rear wheels to steer through the suspension assembly 120.

[0025] It can be known that the suspension assembly 120 is used to absorb and slow down various swings and vibrations during vehicle driving, and to transmit power. The drive motor 130 outputs power through the drive shaft 111 to rotate the rear subframe 110, so that the rear subframe 110 drives the rear wheels to steer through the suspension assembly 120. The steering system 10 of the present application cancels the setting of the steering gear on the whole vehicle, and by setting the drive shaft 111 on the rear subframe 110, the drive motor 130 drives the rear subframe 110 to rotate through the drive shaft 111, and drives the rear wheels to steer through the suspension assembly 120. While realizing the rear wheel steering, the structure of the steering system 10 is simple, which can improve the difficulty of vehicle layout.

[0026] Specifically, the drive motor 130 drives the drive shaft 111 to achieve a turning angle of 0-15°. For example, with the center line of the vehicle as the origin, the drive shaft 111 rotates 0-15° clockwise or counterclockwise, so that the rear subframe 110 rotates 0-15° clockwise or counterclockwise, so that the rear subframe 110 drives the rear wheels to shift to the left or right at the same time through the suspension assembly 120, thereby realizing the steering of the rear wheels of the vehicle.

[0027] Optionally, the drive shaft 111 is connected to the rotor of the drive motor 130, and the drive shaft 111 serves as a power output shaft. That is, only one drive shaft 111 is provided between the drive motor 130 and the rear subframe 110 in this embodiment, which can reduce the number of components of the steering system 10 and the difficulty of the vehicle layout; further, the driving efficiency of the drive motor 130 can be improved.

[0028] Optionally, see Figure 3 , Figure 3 : is a schematic structural diagram of an embodiment of a rear subframe provided by the present application, such as Figure 3 As shown, the rear subframe 110 includes a first frame and a second frame, the first frame is connected to the suspension assembly 120; the second frame is connected to the first frame, and the second frame is extended toward the top of the vehicle relative to the first frame. Among them, the side of the second frame away from the first frame is connected to the drive shaft 111. In order to explain clearly, the first frame is regarded as a reference, the side of the first frame close to the top of the vehicle is the upper side, and the side of the first frame away from the top of the vehicle is the lower side, then the second frame is located above the first frame and connected to the first frame, and the drive shaft 111 is similarly located above the second frame, then the drive shaft is set close to the body of the vehicle. The second frame of this embodiment extends toward the top of the vehicle, and the side of the second frame close to the top of the vehicle is connected to the drive shaft 111, so that the drive shaft 111 is set close to the body of the vehicle, so that the distance from the second frame to the drive motor 130 becomes shorter, which can reduce the axial length of the drive shaft 111, thereby improving the efficiency of the power output of the drive motor 130.

[0029] Optionally, the second frame and the drive shaft 111 are integrally formed, which can reduce the number of components of the steering system 10 and improve the installation efficiency of the steering system 10. In other embodiments, the second frame can also be connected to the drive shaft 111 by welding.

[0030] Optionally, the first skeleton includes a skeleton frame 1121, and the second skeleton includes a plurality of brackets 1131, one end of the bracket 1131 is connected to the skeleton frame 1121, and the other end of the bracket 1131 is connected to the drive shaft 111; the plurality of brackets 1131 are evenly arranged on the skeleton frame 1121. In this embodiment, the plurality of brackets 1131 are evenly arranged on the skeleton frame 1121, so that the driving force of the drive motor 130 can be evenly distributed on the skeleton frame 1121. In addition, the plurality of brackets 1131 can enhance the connection strength with the skeleton frame 1121, and can also reduce the weight of the second skeleton 112.

[0031] Specifically, the skeleton frame 1121 includes a first crossbeam 1121a, a first longitudinal beam 1121b, a second crossbeam 1121c and a second longitudinal beam 1121d connected in sequence, the first longitudinal beam 1121b is used to connect with a connecting rod assembly in the suspension assembly, and the second longitudinal beam 1121d is used to connect with another connecting rod assembly in the suspension assembly. Among them, multiple brackets 1131 can be connected to the midpoints of the first crossbeam 1121a, the first longitudinal beam 1121b, the second crossbeam 1121c and the second longitudinal beam 1121d respectively; or multiple brackets 1131 can be connected to the connection positions of the crossbeams and the longitudinal beams respectively.

[0032] Optionally, the driving shaft 111 is located at the midpoint of the connection between the plurality of brackets 1131 , so that the driving shaft 111 transmits the driving force to the plurality of brackets 1131 evenly.

[0033] Optionally, the first cross beam 1121a, the first longitudinal beam 1121b, the second cross beam 1121c and the second longitudinal beam 1121d are integrally formed. In other embodiments, the first cross beam 1121a, the first longitudinal beam 1121b, the second cross beam 1121c and the second longitudinal beam 1121d may also be connected by welding.

[0034] Optionally, the bracket 1131 includes a first connection portion 1131a and a second connection portion 1131b, one end of the first connection portion 1131a is connected to the skeleton frame 1121, and the end of the second connection portion 1131b away from the first connection portion 1131a is connected to the drive shaft 111; wherein the first connection portion 1131a and the second connection portion 1131b are arranged to intersect. In the above manner, the bracket 1131 extends toward the top of the vehicle, so that the distance from the bracket 1131 to the drive motor 130 becomes shorter, which can reduce the axial length of the drive shaft 111, thereby improving the efficiency of the power output of the drive motor 130.

[0035] Specifically, the first connection portion 1131a is connected to the skeleton frame 1121 at an angle of, for example, 45°, 50°, 55°, 90°, etc. The second connection portion 1131b may intersect with the first connection portion 1131a at an angle of, for example, 45°, 50°, 55°, 90°, etc. Figure 3 The first connection portion 1131a is arranged at 90° with the skeleton frame, and the second connection portion 1131b is arranged at 90° with the first connection portion 1131a, which can improve the stability between the first connection portion 1131a, the second connection portion 1131b and the driving shaft 111.

[0036] Optionally, the suspension assembly 120 includes a connecting rod assembly 121, and the connecting rod assembly 121 is connected to the first frame and the rear wheel respectively. It can be known that the connecting rod assembly 121 is used for power transmission, and can transmit power from the rear sub-frame 110 to the rear wheel, so that when the rear sub-frame 110 rotates, the rear wheel can be driven to rotate through the connecting rod assembly 121.

[0037] Optionally, the rear subframe 110 further includes a first mounting seat 114 and a second mounting seat 115, which are respectively connected to the upper surfaces of the opposite sides of the skeleton frame 1121, and are respectively connected to one end of the corresponding second skeleton bracket 1131. The suspension assembly 120 further includes two shock absorbing assemblies, which are respectively mounted on the first mounting seat 114 and the second mounting seat 115. The shock absorbing assemblies are used to absorb and reduce various swings and vibrations during vehicle driving, which can improve the riding experience of the vehicle.

[0038] Specifically, the first mounting seat 114 and the second mounting seat 115 are provided with a first through hole 116 and a second through hole 117, and the shock absorbing assembly includes a spring 1221 and a shock absorber 1222. One end of the spring 1221 is mounted in the first through hole 116, and the other end of the spring 1221 is connected to the connecting rod assembly 121. One end of the shock absorber 1222 is mounted in the second through hole 117, and the other end of the shock absorber 1222 is mounted in the connecting rod assembly 121.

[0039] Optionally, the rear wheel steering system 10 further includes a vehicle body bottom plate 140, and the rear subframe 110 is mounted at the bottom of the vehicle body bottom plate 140, see Figure 4 , Figure 4 Schematic diagram of the structure of an embodiment of the vehicle body bottom plate provided by the present application. Figure 4As shown, the vehicle body bottom plate 140 is provided with a mounting groove 141 and a mounting hole 142 provided in the mounting groove 141, the drive motor 130 is installed in the mounting groove 141, and the drive shaft 111 is partially located in the mounting hole 142. It can be understood that the mounting groove 141 is used to fix the drive motor 130, and the drive shaft 111 passes through the mounting hole 142 and is connected to the drive motor 130 located in the mounting groove 141. The steering system 10 of this embodiment is provided with a vehicle body bottom plate 140, and the vehicle body bottom plate 140 is provided with a mounting groove 141 and a mounting hole 142 provided in the mounting groove 141, and the drive motor 130 is fixedly installed in the mounting groove 141, so that the drive motor 130 is simple in the layout of the whole vehicle, while taking into account storage and aesthetics.

[0040] The present application provides a vehicle, referring to Figure 5 , Figure 5 is a schematic diagram of the structure of an embodiment of a vehicle provided by the present application, such as Figure 5 As shown, the vehicle 20 includes a steering system of the vehicle, wherein the steering system is any one of the steering systems in the above-mentioned steering system embodiments.

[0041] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A steering system for rear wheels of a vehicle, characterized in that: include: a rear subframe provided with a drive shaft; A suspension assembly, connected to the rear subframe and the rear wheels of the vehicle respectively; The driving motor is connected to the driving shaft and is used to drive the rear sub-frame to rotate so that the rear sub-frame drives the rear wheels to steer through the suspension assembly.

2. The steering system according to claim 1, characterized in that: The rear subframe comprises: A first frame connected to the suspension assembly; A second frame connected to the first frame and extending toward the top of the vehicle relative to the first frame; Wherein, a side of the second frame away from the first frame is connected to the driving shaft.

3. The steering system according to claim 2, characterized in that: The first skeleton includes a skeleton frame, and the second skeleton includes a plurality of brackets, one end of each bracket is connected to the skeleton frame, and the other end of each bracket is connected to the driving shaft; The plurality of brackets are evenly arranged on the skeleton frame.

4. The steering system according to claim 3, characterized in that: The bracket comprises a first connecting portion and a second connecting portion, one end of the first connecting portion is connected to the skeleton frame, and one end of the second connecting portion away from the first connecting portion is connected to the driving shaft; Wherein, the first connection portion and the second connection portion are arranged to intersect.

5. The steering system according to claim 2, characterized in that: The second frame and the driving shaft are integrally formed.

6. The steering system according to claim 3, characterized in that: The suspension assembly comprises: A connecting rod assembly is connected to the first frame and the rear wheel respectively.

7. The steering system according to claim 6, characterized in that: The rear sub-frame further includes: a first mounting seat and a second mounting seat, which are respectively connected to the upper surfaces of the two opposite sides of the frame body, and are respectively connected to one end of the corresponding bracket of the second frame; The suspension assembly also includes two shock absorbing assemblies, which are respectively mounted on the first mounting seat and the second mounting seat.

8. The steering system according to claim 1, characterized in that: The rear wheel steering system also includes: The vehicle body floor, the rear subframe is installed at the bottom of the vehicle body floor, wherein the vehicle body floor is provided with a mounting groove and a mounting hole provided in the mounting groove, the drive motor is installed in the mounting groove, and the drive shaft is partially located in the mounting hole.

9. The steering system according to claim 1, characterized in that: The driving shaft is connected to the rotor of the driving motor to serve as a power output shaft.

10. A vehicle, characterized in that: include: A steering system as claimed in any one of claims 1 to 9.

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