A wheel-side motor structure with independent steering and independent driving

Abstract

The present invention discloses a wheel-side motor structure with independent steering and independent driving, and belongs to the technical field of electric vehicles. A wheel-side motor structure with independent steering and independent driving comprises: a rim, a bracket connected to the side of the rim, and a steering assembly and a driving assembly respectively arranged on the bracket; a disc is arranged on the inner side of the rim, and the bracket and the driving assembly are respectively connected to the disc. The present invention is mainly used in electric vehicles with distributed drive, so that each wheel-side motor structure has the ability of independent steering and independent driving. The steering assembly and the driving assembly are not directly installed on the inner side of the rim, which can avoid the difficult-to-solve technical problems such as waterproofing and heat dissipation, and can also solve the installation problems of the steering assembly and the driving assembly. By respectively arranging the steering assembly and the driving assembly on the bracket, the unsprung mass is reduced and the dynamic driving performance of the vehicle is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric vehicles, and in particular to a wheel-side motor structure with independent steering and independent driving. Background Art

[0002] Electrification has become an inevitable trend in the development of automobiles. In order to better achieve the goals of high efficiency, energy saving and active safety of electric vehicles, vehicle driving dynamics control devices have always been the focus of research and development in the automotive industry. Distributed drive electric vehicles based on wheel-side or wheel-hub motors have the advantages of good controllability, short transmission chain, compact structure, and high utilization of vehicle space. Compared with traditional internal combustion engine vehicles, distributed drive electric vehicles have eliminated complex transmission systems such as transmissions and differentials, and have higher transmission efficiency. Moreover, the drive motors of each wheel can be independently controlled. Through the reasonable distribution of motor torque, the motor's high efficiency range is fully utilized, and combined with feedback braking strategies, the economy of the vehicle can be improved.

[0003] The disadvantages of wheel hub motors are that they have large unsprung mass and moment of inertia, which affect the handling of the vehicle; the motor power is limited by the space inside the wheel and cannot meet the demand for high power; the wheel hub motor has difficulty in dissipating heat during braking; and the problems of sealing and waterproofing inside the wheel are difficult to solve. The same is true for wheel-side motors, which are limited by the large unsprung mass and greatly affect the performance of the vehicle. Summary of the invention

[0004] The object of the present invention is to provide a wheel-side motor structure with independent steering and independent driving, so as to solve the problem of large unsprung mass of existing distributed drive electric vehicles.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] An independently steered and independently driven wheel-side motor structure comprises: a wheel rim, a bracket connected to the side of the wheel rim, and a steering assembly and a driving assembly respectively arranged on the bracket;

[0007] A disc is arranged on the inner side of the wheel rim, and the bracket and the driving assembly are respectively connected with the disc.

[0008] The present invention is mainly applied to electric vehicles with distributed drive, so that each wheel-side motor structure has the ability of independent steering and independent driving. In addition, the steering assembly and the drive assembly are not directly installed on the inner side of the wheel rim, which can not only avoid the difficult technical problems such as waterproofing and heat dissipation, but also solve the installation problems of the steering assembly and the drive assembly. Then, by setting the steering assembly and the drive assembly on the bracket respectively, the unsprung mass is reduced and the dynamic driving performance of the vehicle is improved.

[0009] Furthermore, the above-mentioned bracket includes: a vertically arranged longitudinal arm, a first transverse arm connected to the top of the longitudinal arm, a second transverse arm located below the first transverse arm, and a supporting mechanism connected to the bottom of the longitudinal arm and connected to the disc, the first transverse arm cooperates with the steering assembly, and the second transverse arm cooperates with the driving assembly.

[0010] The longitudinal arm of the present invention plays a connecting and supporting role. The first cross arm and the second cross arm are used to place the steering assembly and the driving assembly respectively. The supporting mechanism is connected to the disc and provides a certain supporting force to the longitudinal arm.

[0011] Furthermore, the steering assembly comprises: a steering motor and a worm gear reducer connected to the steering motor, and the worm gear reducer is located on the top surface of the first cross arm.

[0012] The steering motor and the worm gear reducer of the present invention are both located on the top surface of the first cross arm, so that the worm gear reducer can drive the integral bracket and the wheel rim to rotate through the first cross arm, and can also reduce the unsprung mass of the wheel motor.

[0013] Furthermore, the driving assembly comprises: a driving motor arranged on the top surface of the second cross arm and a flywheel coaxially connected to the disc, and the flywheel and the driving motor are connected via a synchronous belt.

[0014] After the driving motor of the present invention is started, the flywheel is driven to rotate through the synchronous belt, thereby driving the wheel rim, and the flywheel can also play the role of reducing speed and increasing torque.

[0015] Furthermore, the flywheel and the disc are connected via a universal joint.

[0016] A universal joint is arranged between the flywheel and the disc of the present invention, so that when the bracket rotates, the wheel rim can rotate accordingly with the bracket.

[0017] Furthermore, the supporting mechanism comprises: a lower fork arm connected to the bottom end of the longitudinal arm and an upper fork arm located above the lower fork arm, the lower fork arm is connected to the bottom end of the disc, and the upper fork arm is connected to the top end of the disc.

[0018] The present invention adopts a double wishbone design, which makes the inner space of the wheel large, thereby facilitating the installation of the braking system.

[0019] Furthermore, a spring is provided between the upper fork arm and the lower fork arm, the top end of the spring is connected to a position on the longitudinal arm close to the upper fork arm, and the bottom end of the spring is connected to an end of the lower fork arm close to the disc.

[0020] The present invention can not only enhance the overall strength of the double wishbone structure by arranging the spring, but also play a role in buffering and shock absorption.

[0021] Furthermore, the lower fork arm is a triangular structure, the top angle is connected to the disc, and the two bottom angles are respectively connected to the longitudinal arms.

[0022] Furthermore, the number of the upper fork arms is two, one end of the two upper fork arms is simultaneously connected to the top end of the disc, the other ends of the two upper fork arms are respectively connected to the longitudinal arms, and the number of the springs is also two.

[0023] The present invention enables the upper fork arm and the lower fork arm to cooperate with the longitudinal arm to form a triangular structure, thereby facilitating increasing the stability of the overall structure.

[0024] The present invention has the following beneficial effects:

[0025] The present invention is mainly applied to electric vehicles with distributed drive, so that each wheel-side motor structure has the ability of independent steering and independent driving. The steering assembly and the drive assembly are not directly installed on the inner side of the wheel rim, which can not only avoid the difficult technical problems such as waterproofing and heat dissipation, but also solve the installation problems of the steering assembly and the drive assembly. Then, by setting the steering assembly and the drive assembly on the bracket respectively, the unsprung mass is reduced and the dynamic driving performance of the vehicle is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the wheel-side motor structure with independent steering and independent driving of the present invention;

[0027] Figure 2 It is a front view of the wheel-side motor structure with independent steering and independent driving of the present invention;

[0028] Figure 3 It is a cross-sectional view of the wheel-side motor structure with independent steering and independent driving of the present invention.

[0029] In the figure: 10-wheel rim; 11-disc; 20-bracket; 21-longitudinal arm; 22-first cross arm; 23-second cross arm; 24-support mechanism; 25-lower fork arm; 26-upper fork arm; 27-spring; 30-steering assembly; 31-steering motor; 32-worm gear reducer; 40-drive assembly; 41-drive motor; 42-flywheel; 43-synchronous belt; 44-universal joint. DETAILED DESCRIPTION

[0030] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0031] Example

[0032] Reference Figure 1 and Figure 3, an independently steered and independently driven wheel-side motor structure, comprising: a rim 10, a bracket 20 connected to the side of the rim 10, and a steering assembly 30 and a driving assembly 40 respectively arranged on the bracket 20. A disc 11 is arranged on the inner side of the rim 10, and the rim 10 is connected to the bracket 20 and the driving assembly 40 respectively through the disc 11, so that when the bracket 20 rotates, the rim 10 can rotate accordingly; when the driving assembly 40 is started, it can also drive the rim 10 to rotate through the disc 11.

[0033] Reference Figure 2 and Figure 3 The bracket 20 includes: a vertically arranged longitudinal arm 21, a first transverse arm 22 connected to the top of the longitudinal arm 21, a second transverse arm 23 located below the first transverse arm 22, and a support mechanism 24 connected to the bottom of the longitudinal arm 21 and connected to the disc 11. The first transverse arm 22 cooperates with the steering assembly 30 to support the steering assembly 30, and the second transverse arm 23 is used to support individual components in the driving assembly 40. The first transverse arm 22 and the second transverse arm 23 are both located above the support mechanism 24, thereby reducing the unsprung mass in the structure and helping to improve the dynamic driving performance of the vehicle.

[0034] The supporting mechanism 24 includes: a lower fork arm 25 connected to the bottom end of the longitudinal arm 21, and an upper fork arm 26 located above the lower fork arm 25. The lower fork arm 25 is connected to the bottom end of the disc 11, and the upper fork arm 26 is connected to the top end of the disc 11, thereby playing a role in connecting the disc 11 and the longitudinal arm 21. There are two upper fork arms 26, and the two upper fork arms 26 cooperate with the longitudinal arm 21 to form a triangular structure. The ends of the two upper fork arms 26 connected to the disc 11 are the apex angles of the triangle, and the ends of the two upper fork arms 26 connected to the longitudinal arm 21 are the two bottom angles of the triangle, thereby helping to improve stability. The lower fork arm 25 is also a triangular structure, the apex angle of the triangle is connected to the disc 11, and the two bottom angles are connected to the longitudinal arm 21, thereby cooperating with the upper fork arm 26 which is also a triangular structure, so that the top and bottom ends of the disc 11 can be stably connected to the longitudinal arm 21.

[0035] A spring 27 is also provided between the upper fork arm 26 and the lower fork arm 25. There are two springs 27. The bottom end of the spring 27 abuts against the top surface of the end of the lower fork arm 25 close to the disc 11, and the top end of the spring 27 abuts against the position of the longitudinal arm 21 close to the upper fork arm 26. The upper fork arm 26, the lower fork arm 25 and the spring 27 together form a support mechanism 24, which plays a role in connecting the rim 10 and the longitudinal arm 21. The rim 10 can provide a certain support force to the support mechanism 24, and the support mechanism 24 can also provide a certain support force to the overall bracket 20. In addition, through the design of the double fork arm, the space inside the wheel is relatively large, so that the brake system can be installed conveniently.

[0036] The steering assembly 30 includes: a steering motor 31 used as a power source and a worm gear reducer 32 connected to the steering motor 31. The bottom surface of the worm gear reducer 32 is connected to the top surface of the first cross arm 22. After the steering motor 31 is started, the worm gear reducer 32 can be driven to rotate, so that the integral bracket 20 and the rim 10 rotate accordingly. In addition, the worm gear has a self-locking property, so the rotational torque of the bracket 20 caused by the disturbance of the rim 10 during the steering process will not be transmitted to the worm gear reducer 32, so when the wheel is disturbed by the outside world, no unnecessary rotation will occur, ensuring the accuracy of wheel steering.

[0037] The driving assembly 40 includes: a driving motor 41 arranged on the second cross arm 23 and a flywheel 42 arranged coaxially with the disc 11, and the flywheel 42 is connected to the driving motor 41 through a synchronous belt 43. When the driving motor 41 is started, the synchronous belt 43 drives the flywheel 42 to rotate at the same time. Since the flywheel 42 has a larger diameter than the output shaft of the driving motor 41, it can play a role in reducing speed and increasing torque. A universal joint 44 is also connected between the flywheel 42 and the disc 11, so that when the bracket 20 rotates, the rim 10 can rotate accordingly with the bracket 20. In addition, the power can be transmitted from the flywheel 42 to the rim 10 through the universal joint 44 to complete the power transmission, thereby realizing independent control of steering and driving.

[0038] The operation process of the present invention is as follows: (1) the steering motor 31 is started, driving the worm gear reducer 32 to rotate simultaneously; (2) the worm gear reducer 32 rotates and drives the rim 10 to rotate accordingly through the bracket 20; (3) the drive motor 41 is started, and the flywheel 42 is driven by the synchronous belt 43 to rotate; (4) the flywheel 42 plays the role of reducing speed and increasing torque, so that the power is transmitted to the rim 10 through the universal joint 44, thereby realizing independent control of steering and driving.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A wheel-side motor structure with independent steering and independent driving, characterized in that: include: A rim (10), a bracket (20) connected to a side of the rim (10), and a steering assembly (30) and a driving assembly (40) respectively arranged on the bracket (20); A disc (11) is provided on the inner side of the wheel rim (10), and the bracket (20) and the driving assembly (40) are respectively connected to the disc (11); The bracket (20) comprises: a vertically arranged longitudinal arm (21), a first transverse arm (22) connected to the top of the longitudinal arm (21), a second transverse arm (23) located below the first transverse arm (22), and a supporting mechanism (24) connected to the bottom of the longitudinal arm (21) and connected to the disc (11), the first transverse arm (22) cooperating with the steering assembly (30), and the second transverse arm (23) cooperating with the driving assembly (40); The steering assembly (30) comprises: a steering motor (31) and a worm gear reducer (32) connected to the steering motor (31), wherein the worm gear reducer (32) is located on the top surface of the first cross arm (22); The driving assembly (40) comprises: a driving motor (41) arranged on the top surface of the second cross arm (23) and a flywheel (42) coaxially connected to the disc (11); the flywheel (42) and the driving motor (41) are connected via a synchronous belt (43).

2. The wheel-side motor structure with independent steering and independent driving according to claim 1, characterized in that: The flywheel (42) is connected to the disc (11) via a universal joint (44).

3. The wheel-side motor structure with independent steering and independent driving according to claim 1 or 2, characterized in that: The supporting mechanism (24) comprises: a lower fork arm (25) connected to the bottom end of the longitudinal arm (21) and an upper fork arm (26) located above the lower fork arm (25), the lower fork arm (25) being connected to the bottom end of the disc (11), and the upper fork arm (26) being connected to the top end of the disc (11).

4. The wheel-side motor structure with independent steering and independent driving according to claim 3 is characterized in that: A spring (27) is provided between the upper fork arm (26) and the lower fork arm (25), the top end of the spring (27) being connected to a position on the longitudinal arm (21) close to the upper fork arm (26), and the bottom end of the spring (27) being connected to an end of the lower fork arm (25) close to the disc (11).

5. The wheel-side motor structure with independent steering and independent driving according to claim 4, characterized in that: The lower fork arm (25) is a triangular structure, the top angle of which is connected to the disc (11), and the two bottom angles of which are respectively connected to the longitudinal arms (21).

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