Four-wheel independent steering device of wheel-side driving motor double-fork-arm suspension

Abstract

The utility model provides a four-wheel independent steering device of a wheel edge driving motor double-fork-arm suspension, which comprises a driving walking system, a suspension system and a steering system, the driving walking system comprises a driving motor, a driving motor speed reducer, a driving motor controller module, brake disc calipers, a hub flange plate, a brake disc and wheels, the suspension system comprises an upper swing arm, a shock absorber and a lower swing arm. The steering system comprises a steering motor, a steering speed reducer, a steering speed reducer output shaft and a steering arm. The wheel edge driving independent steering device has the advantages of being high in system integration degree, simple in structure, short in steering motion transmission and power driving chain, high in transmission efficiency and large in power density, the stability performance of the steering device is enhanced, the bearing capacity of the whole vehicle is high, and the driving comfort is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle steering, in particular to a four-wheel independent steering device with a wheel-side drive motor double wishbone suspension. Background Art

[0002] At present, the vehicle steering system uses the steering mechanism to make the inside and outside of the wheel turn at a certain angle. However, due to the influence of the spatial position between the steering mechanism and the suspension guide mechanism and the steering rod, motion interference will occur, which makes it impossible to achieve large-angle steering. The existing wire-controlled four-wheel independent steering technology eliminates the traditional steering mechanism, fundamentally solving the problem of large-angle steering. The wheels are driven to rotate by four sets of independently controllable servo motor transmission systems. If the structure allows, the steering angle can reach ±90°, allowing the vehicle to achieve multiple modes such as in-situ turning and crab walking. However, the existing wire-controlled independent steering technology often adopts the form of candle-type suspension, etc., which makes it difficult to take into account the movement performance of the suspension and the reliability and load-bearing capacity of the steering system while achieving independent steering.

[0003] In addition, from the current research situation, four-wheel independent drive electric vehicles are mainly driven by wheel hub motors. Since the wheel hub motors are installed inside the wheels, the unsprung mass of the electric vehicle is increased, making the vehicle's ride comfort and maneuverability worse. In addition, the power and torque of the wheel hub motors are generally smaller than those of the wheel side motors, which leads to the fact that the power of the electric vehicle is not as good as that of the wheel side motor drive. Utility Model Content

[0004] In view of the technical problems that the existing wire-controlled independent steering technology often adopts a candle-type suspension form, which makes it difficult to take into account the movement performance of the suspension and the reliability and load-bearing capacity of the steering system while realizing independent steering, and at the same time, four-wheel independent drive electric vehicles mainly adopt wheel hub motor drive, which makes the vehicle's smoothness and maneuverability worse, and the power of electric vehicles is not as good as that of wheel-side motor drive, the utility model provides a four-wheel independent steering device with a wheel-side drive motor double wishbone suspension.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A four-wheel independent steering device with a wheel-side drive motor double wishbone suspension, comprising a drive travel system, a suspension system and a steering system, wherein the drive travel system comprises a drive motor, a drive motor reducer, a drive motor controller module, a brake disc caliper, a wheel hub flange, a brake disc and a wheel, wherein the output shaft of the drive motor is the input shaft of the drive motor reducer, the drive motor controller module is integrated in the steering system or the drive travel system or is arranged in a split manner, the brake disc caliper is fixedly connected to the housing of the drive motor reducer, the wheel hub flange is fixedly connected to the output shaft of the drive motor reducer, and the brake disc and the wheel are fixed on the wheel hub flange; the suspension system comprises an upper swing arm, Shock absorber and lower swing arm, one end of the upper swing arm is connected to the frame pin shaft, and the other end is connected to the steering reducer of the steering system, the upper support of the shock absorber is fixedly connected to the frame, the lower support of the shock absorber is fixedly connected to the lower swing arm, one end of the lower swing arm is connected to the frame through the swing arm pin shaft, and the other end is connected to the lower end of the driving motor through a ball joint, the upper swing arm and the lower swing arm can swing up and down around the swing arm pin shaft with the wheel; the steering system includes a steering motor, a steering reducer, a steering reducer output shaft and a steering arm, the input shaft of the steering reducer is the output shaft of the steering motor, the upper end of the steering arm is fixedly connected to the steering reducer output shaft, and the lower end of the steering arm is fixedly connected to the driving walking system.

[0007] Furthermore, an upper swing arm rotation fulcrum pin is provided on the steering reducer, and the other end of the upper swing arm is connected to the steering reducer via the upper swing arm rotation fulcrum pin.

[0008] Furthermore, the center of the steering arm is a through hole, and all wiring harnesses in the driving and traveling system are led out from the through hole in the center of the steering arm.

[0009] Furthermore, the center lines of the steering reducer output shaft, the steering arm and the ball joint coincide.

[0010] Compared with the prior art, the four-wheel independent steering device with a wheel-side drive motor double wishbone suspension provided by the utility model, after the steering motor is started and operated, drives the drive motor on the side of the wheel to rotate through the steering reducer, the steering reducer output shaft and the steering arm, thereby realizing the steering of the wheel, and because the drive motor is installed on the side of the wheel to form a wheel-side drive motor, the smoothness and maneuverability of the vehicle can be improved, the motor power and torque are greater than those of the hub motor, and the power of the electric vehicle is also better. Therefore, the wheel-side drive independent steering device adopted in this application has high system integration, simple structure, short steering motion transmission and power drive chain, high transmission efficiency, high power density, enhanced stability of the steering device, high vehicle load-bearing capacity, and improved driving comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1The utility model discloses a four-wheel independent steering device with a double wishbone suspension and a wheel-side drive motor.

[0012] Figure 2 yes Figure 1 The schematic diagram of the structure behind the wheels is omitted.

[0013] Figure 3 yes Figure 1 Schematic diagram of the front view structure.

[0014] In the figure, 1. driving travel system; 11. driving motor; 111. screw hole; 12. driving motor reducer; 13. driving motor controller module; 131. wiring harness; 14. brake disc caliper; 15. wheel hub flange; 16. brake disc; 17. wheel; 18. output shaft of driving motor reducer; 2. suspension system; 21. upper swing arm; 22. shock absorber; 221. upper support; 222. lower support; 23. lower swing arm; 24. ball joint; 3. steering system; 31. steering motor; 32. steering reducer; 33. steering reducer output shaft; 34. steering arm; 35. upper swing arm rotating fulcrum pin; 4. frame. DETAILED DESCRIPTION

[0015] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0016] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention 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 cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] Please refer to Figures 1 to 3As shown, the utility model provides a four-wheel independent steering device of a wheel-side drive motor double wishbone suspension, comprising a drive travel system 1, a suspension system 2 and a steering system 3, wherein the drive travel system 1 comprises a drive motor 11, a drive motor reducer 12, a drive motor controller module 13, a brake disc caliper 14, a wheel hub flange 15, a brake disc 16 and a wheel 17, wherein the output shaft of the drive motor 11 is the input shaft of the drive motor reducer 12, and the drive motor controller module 13 is integrated in the steering system 3 or the drive travel system 1 or is arranged in a split manner, specifically, the drive motor controller module 13 can be integrated in the steering arm 34 of the steering system 3, the drive motor 11 of the drive travel system 1 or the drive motor reducer 12, or can be independently opened from the steering system 3 or the drive travel system 1 for split arrangement, the brake disc caliper 14 is fixedly connected to the housing of the drive motor reducer 12, the wheel hub flange 15 is fixedly connected to the output shaft 18 of the drive motor reducer, and the brake disc 16 and the wheel 17 are fixed on the wheel hub flange 15; The system 2 includes an upper swing arm 21, a shock absorber 22 and a lower swing arm 23. One end of the upper swing arm 21 is connected to the frame 4 with a pin, and the other end is connected to the steering reducer 32 of the steering system 3. The upper support 221 of the shock absorber 22 is fixedly connected to the frame 4, and the lower support 222 of the shock absorber 22 is fixedly connected to the lower swing arm 23. One end of the lower swing arm 23 is connected to the frame 4 through a swing arm pin, and the other end is connected to the lower end of the drive motor 11 through a ball joint 24. The upper swing arm 21 and the lower swing arm 23 can rotate with the wheel 17 around the swing arm pin. The shaft swings up and down, so that when the wheel 17 swings up and down, the force is all on the shock absorber 22, which increases the reliability of the suspension and steering system; the steering system 3 includes a steering motor 31, a steering reducer 32, a steering reducer output shaft 33 and a steering arm 34, the steering reducer 32 is a worm gear reducer, the input shaft of the steering reducer 32 is the output shaft of the steering motor 31, the upper end of the steering arm 34 is fixedly connected to the steering reducer output shaft 33, and the lower end of the steering arm 34 is fixedly connected to the driving travel system 1.

[0019] As a specific embodiment, the output shaft 18 of the drive motor reducer and the hub flange 15 as well as the output shaft 33 of the steering reducer and the upper end of the steering arm 34 are fixed by spline connection, so that the load-bearing capacity of the whole vehicle can be enhanced.

[0020] As a specific example, please refer to Figure 2 and Figure 3 As shown, the steering reducer 32 is provided with an upper swing arm rotating fulcrum pin 35, and the other end of the upper swing arm 21 is connected to the steering reducer 32 through the upper swing arm rotating fulcrum pin 35, and technical personnel in this field can also adopt other methods to achieve active connection on this basis.

[0021] As a specific example, please refer to Figure 3 As shown, the center of the steering arm 34 is a through hole, and all the wiring harnesses 131 in the driving travel system 1 are led out from the through hole in the center of the steering arm 34, thereby preventing the wiring harnesses including power lines and signal lines from rotating when the wheels turn, thereby reducing the disorder and damage of the wiring harnesses caused by the swing of the wiring harnesses when turning.

[0022] As a specific example, please refer to Figures 1 to 3 As shown, the lower end of the steering arm 34 is fixedly connected to the screw holes 111 on both sides of the housing of the driving motor 11 in the driving travel system 1 or the end cover of the driving motor through bolts, so as to realize the fixed connection between the lower end of the steering arm 34 and the driving motor 11 in the driving travel system 1. Of course, those skilled in the art can also fix the lower end of the steering arm 34 to the driving motor reducer 12, which can also drive the wheels to turn.

[0023] As a specific embodiment, the center lines of the steering reducer output shaft 33, the steering arm 34 and the ball joint 24 coincide with each other, thereby making the steering of the entire device more flexible.

[0024] Compared with the prior art, the four-wheel independent steering device with a wheel-side drive motor double wishbone suspension provided by the utility model, after the steering motor is started and operated, drives the drive motor on the side of the wheel to rotate through the steering reducer, the steering reducer output shaft and the steering arm, thereby realizing the steering of the wheel, and because the drive motor is installed on the side of the wheel to form a wheel-side drive motor, the smoothness and maneuverability of the vehicle can be improved, the motor power and torque are greater than those of the hub motor, and the power of the electric vehicle is also better. Therefore, the wheel-side drive independent steering device adopted in this application has high system integration, simple structure, short steering motion transmission and power drive chain, high transmission efficiency, high power density, enhanced stability of the steering device, high vehicle load-bearing capacity, and improved driving comfort.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A four-wheel independent steering device with a wheel-side drive motor double wishbone suspension, characterized in that: It includes a driving travel system, a suspension system and a steering system. The driving travel system includes a driving motor, a driving motor reducer, a driving motor controller module, a brake disc caliper, a wheel hub flange, a brake disc and a wheel. The output shaft of the driving motor is the input shaft of the driving motor reducer. The driving motor controller module is integrated into the steering system or the driving travel system or is arranged in a split manner. The brake disc caliper is fixedly connected to the housing of the driving motor reducer. The wheel hub flange is fixedly connected to the output shaft of the driving motor reducer. The brake disc and the wheel are fixed on the wheel hub flange. The suspension system includes an upper swing arm, a shock absorber and a lower swing arm. One end of the arm is connected to the frame pin shaft, and the other end is connected to the steering reducer of the steering system. The upper support of the shock absorber is fixedly connected to the frame, and the lower support of the shock absorber is fixedly connected to the lower swing arm. One end of the lower swing arm is connected to the frame through the swing arm pin shaft, and the other end is connected to the lower end of the drive motor through a ball joint. The upper swing arm and the lower swing arm can swing up and down around the swing arm pin shaft with the wheel; the steering system includes a steering motor, a steering reducer, a steering reducer output shaft and a steering arm. The input shaft of the steering reducer is the output shaft of the steering motor. The upper end of the steering arm is fixedly connected to the steering reducer output shaft, and the lower end of the steering arm is fixedly connected to the driving travel system.

2. The four-wheel independent steering device of the wheel-side drive motor double wishbone suspension according to claim 1, characterized in that: An upper swing arm rotating fulcrum pin is provided on the steering reducer, and the other end of the upper swing arm is connected to the steering reducer through the upper swing arm rotating fulcrum pin.

3. The four-wheel independent steering device of the wheel-side drive motor double wishbone suspension according to claim 1, characterized in that: The center of the steering arm is a through hole, and all wiring harnesses in the driving and traveling system are led out from the through hole in the center of the steering arm.

4. The four-wheel independent steering device of the wheel-side drive motor double wishbone suspension according to claim 1, characterized in that: The center lines of the steering reducer output shaft, the steering arm and the ball joint coincide with each other.

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