CN106627744A - Independent steering system of electric vehicle - Google Patents

Abstract

The invention is applicable to the technical field of electric vehicles, and provides an independent steering system of the electric vehicle, which includes a vehicle electric control system, a steering motor, a steering assembly, a suspension assembly and a wheel assembly. The vehicle electronic control system includes an ECU, and the steering motor is electrically connected to the ECU; the upper end of the steering assembly is connected to the output shaft of the steering motor; the upper end of the suspension assembly is installed on the lower end of the steering assembly; the wheel assembly includes a wheel and a mounting plate. A hub motor is arranged inside the wheel, the hub motor is electrically connected to the ECU, one end of the mounting plate is fixed on one side of the wheel, the other end is fixed on the lower end of the suspension assembly, and the output of the steering motor The centers of rotation of the axles, steering and suspension components, and the lateral centers of the wheels are kept in line. The steering system receives and processes the driver's driving intention through the ECU, and drives the steering motors of the wheels to rotate corresponding angles, thereby realizing the individual steering of the wheels.

Description

An independent steering system for an electric vehicle

technical field

The invention belongs to the technical field of electric vehicles, in particular to an independent steering system of the electric vehicle.

Background technique

The rapid development of the automobile industry and the continuous increase of people's demand for the use of automobiles have led to a continuous increase in the production and ownership of automobiles, thus exacerbating the energy and environmental issues that people are currently concerned about. Pure electric vehicles have the characteristics of low noise, no pollution, diversified energy sources, and high energy efficiency. They are an important way to solve the problem of automobiles in cities. The development of pure electric vehicles has a far-reaching impact on adjusting my country's industrial structure, improving innovation capabilities and market competitiveness in key areas, and promoting coordinated economic and social development. From the perspective of the development of the automobile industry, the rapid development of electric vehicles has an irreversible trend.

If electric vehicles are to be market-oriented and practical, they must proceed from their own characteristics and design electric vehicles in a true sense in order to essentially improve the performance of the vehicle, especially the design of the steering system, which is an important part of electric vehicles. . Automobile steering system is a structure used to control the driving direction of the car according to the driver's wishes and keep the car safe and stable. The traditional automobile steering system generally follows the Ackermann steering model. The extension lines of all the wheel axes intersect at one point. This steering model can avoid the additional resistance caused by the wheels sliding relative to the ground and reduce tire wear. With the application of in-wheel electric vehicle technology, the power, transmission and braking devices are integrated into the wheel hub, which greatly simplifies the mechanical parts of the car. However, due to the characteristics of in-wheel motor technology, the entire steering system subverts the structure of the traditional steering system. Conventional steering systems cannot successfully match the wheels of in-hub EVs.

Compared with the traditional mechanical steering system, the automotive steering-by-wire system cancels the mechanical connection between the steering wheel and the steering wheel and replaces it with electrical signal control. However, the existing automotive steering-by-wire system only uses the traditional mechanical steering system. Some of the mechanical parts in the steering wheel are changed to electric signal control parts, and the specific steering is still a mechanical transmission steering method, which cannot realize the individual steering of the wheels, and the mechanical transmission between the wheels cannot accurately and flexibly control the rotation angle of each wheel, which is easy There is a problem with missing steering.

Contents of the invention

The technical problem to be solved by the present invention is to provide an independent steering system of an electric vehicle, which aims to be able to match with the wheels of the hub electric vehicle to realize independent steering of the wheels.

In order to solve the above-mentioned technical problems, the present invention is implemented in the following way. An independent steering system of an electric vehicle includes a vehicle electronic control system and a wheel assembly. The vehicle electronic control system includes an ECU, and the wheel assembly includes wheels. include:

a steering motor, the steering motor is electrically connected to the ECU;

a steering assembly, the upper end of which is connected to the output shaft of the steering motor;

a suspension assembly, the upper end of the suspension assembly is mounted on the lower end of the steering assembly;

The wheel assembly also includes a mounting plate, an in-wheel motor is arranged inside the wheel, the in-wheel motor is electrically connected to the ECU, the output shaft of the in-wheel motor is in transmission connection with the wheel, and one end of the mounting plate is fixed On one side of the wheel, the other end is fixed to the lower end of the suspension assembly, and the output shaft of the steering motor, the rotation center of the steering assembly, the rotation center of the suspension assembly, and the lateral center of the wheel Set coaxially and keep on the same straight line.

Further, the suspension system also includes a shock-absorbing and stabilizing assembly for lateral support and shock absorption, the shock-absorbing and stabilizing assembly includes a first panel, a second panel and a compression spring, and the compression spring is clamped on the The first panel and the second panel are locked by bolts, the first panel is fixed on the suspension assembly, and the second panel is connected to the steering assembly and fixed on the vehicle body.

Further, the steering assembly includes a transmission shaft and a slewing support bearing, the slewing support bearing has an inner ring and an outer ring that rotate independently of each other, the transmission shaft has a big end and a small end, and the slewing support bearing is sleeved On the small end of the transmission shaft and pressed on the top of the large end, the inner ring of the slewing support bearing and the large end of the transmission shaft are provided with through holes, the small end of the transmission shaft The end is connected with the output shaft of the steering motor, and its big end passes through the inner ring of the slewing support bearing and the through hole on the big end of the transmission shaft in sequence through bolts, and is fixed on the suspension assembly.

Further, the steering assembly also includes a square steel and a thrust ball bearing, the square steel is sleeved on the big end of the transmission shaft and fixedly connected with the vehicle body, the slewing support bearing is located inside the square steel, In addition, the outer ring of the slewing support bearing is fixed on the square steel, and the thrust ball bearing is sleeved on the big end of the transmission shaft, and is located between the square steel and the suspension assembly.

Further, the steering assembly also includes a countersunk ring, the countersunk ring is arranged between the square steel and the thrust ball bearing, a groove is opened on the outer ring of the slewing support bearing, and the groove A through hole is opened in the groove, and a corresponding groove is also opened on the countersunk ring, and the bolts pass through the outer ring of the slewing support bearing, the square steel and the countersunk ring in sequence, and are threadedly connected with the nut, and the The upper end of the bolt is accommodated in the groove of the outer ring of the slewing support bearing, and the lower end of the bolt and the nut are jointly accommodated in the groove on the countersunk ring.

Further, the suspension assembly includes a suspension upper panel, a base, a shock absorber and a shock absorber fixing piece, and the shock absorber fixing piece is evenly distributed under the suspension upper panel and fixed on the On the upper plate of the suspension, a through hole is provided on the shock absorber fixing part, the top of the shock absorber has a positioning hole and is located in the shock absorber fixing part, and the top of the shock absorber is passed through by a bolt. Through the through hole of the shock absorber fixing part and the positioning hole on the top of the shock absorber, it is fixed on the shock absorber fixing part. There are several sleeves on the base, and the center of each shock absorber fixing part The shaft coincides with the central axis of a sleeve, the bottom of the shock absorber is inserted into the sleeve and fixed in the sleeve, and the base is fixed on the mounting plate.

Further, the suspension assembly further includes a deep groove ball bearing, a connecting ring and a gasket, the deep groove ball bearing is sleeved on the base, and the gasket is arranged below the deep groove ball bearing, The connecting ring is sleeved on the outer edge of the deep groove ball bearing and can move up and down along the axis of the deep groove ball bearing, and the first panel is fixed on the connecting ring.

Further, the wheel assembly also includes a hub motor housing, a backing plate and an electromagnetic brake, the hub motor housing is sleeved on the hub motor and fixed on the wheel together, the hub motor and the hub motor The shell has a protruding part, and the protruding part passes through the backing plate and is installed on the mounting plate. Both sides of the backing plate are interposed between the mounting plate and the hub motor shell, so The backing plate has a boss, the electromagnetic brake is sleeved on the boss, and both sides of the electromagnetic brake are sandwiched between the backing plate and the hub motor shell.

Further, the wheel assembly further includes a code disc for measuring the rotation speed of the wheel, and the code disc is fixed on one side of the hub motor housing and located between the hub motor housing and the electromagnetic brake.

Further, the independent steering system of the electric vehicle also includes a brake pedal and a driving pedal for collecting the driver's driving intention in terms of vehicle speed, and for collecting the steering wheel angle to obtain the photoelectric code of the driver's driving intention in terms of steering. , and a torque motor for feedback to the steering wheel.

Compared with the prior art, the present invention has the beneficial effect that: an independent steering system of an electric vehicle according to the present invention includes a vehicle electric control system, a steering motor, a steering assembly, a suspension assembly and a wheel assembly, and the vehicle The electronic control system includes an ECU for receiving the driver's driving intention and implementing the driver's instructions, the steering assembly is connected to the lower end of the steering motor, the suspension assembly is connected to the lower end of the steering assembly, the The mounting plate of the wheel assembly is connected to the lower end of the suspension assembly, the output shaft of the steering motor, the rotation center of the steering assembly, the rotation center of the suspension assembly and the lateral center of the wheel are coaxially arranged and kept at the same On a straight line, to ensure that the kingpin does not shift when the steering assembly is turning, it is ensured that the steering center remains unchanged. The ECU is used to receive and process the driving intention transmitted by the driver. Through the control of the main controller of the ECU, the steering motors of the wheels are respectively driven to rotate by corresponding angles, and the rotation of the steering motors drives the steering components, suspension Components and the corresponding angle of wheel rotation, the rotation angle of each steering motor is controlled by the ECU main controller, so as to realize the individual steering of the wheels; at the same time, the ECU main controller controls the drive hub motor to provide power to drive the wheel to forward, so that the steering system is fully matched with the wheels of the in-wheel electric vehicle. In addition, since the rotation angle of the steering motor is specifically controlled by the ECU main controller, the rotation angle of each wheel can be precisely controlled, thereby avoiding the problem of missing steering.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of an independent steering system of an electric vehicle provided by an embodiment of the present invention.

FIG. 2 is a structural schematic diagram of another view of FIG. 1 .

FIG. 3 is a schematic structural diagram of the working principle of FIG. 1 .

Fig. 4 is a schematic cross-sectional structure diagram of the rotating assembly in Fig. 1 .

Fig. 5 is a schematic structural diagram of the suspension assembly in Fig. 1 .

Fig. 6 is a schematic cross-sectional structure diagram of the base and the deep groove ball bearing in Fig. 5 .

Fig. 7 is a structural schematic diagram of the shock absorbing and stabilizing system in Fig. 1 .

FIG. 8 is a schematic top view of the structure of FIG. 7 .

Fig. 9 is a structural schematic diagram of the wheel assembly in Fig. 1 .

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in Figures 1 to 3, an independent steering system 100 for an electric vehicle provided in an embodiment of the present invention includes a vehicle electronic control system (not shown), a steering motor 1, a steering assembly 2, and a suspension assembly 3 and the wheel assembly 4. The vehicle electronic control system includes an ECU main controller 50 for receiving the driver's driving intention and implementing the driver's instructions. The ECU main controller 50 is used as the brain of the electric vehicle for various data calculations.

The steering motor 1 is electrically connected to the ECU main controller 50 through a motor driver, and the motor driver receives a signal command from the ECU main controller 50 to drive the steering motor 1 to rotate by a corresponding angle.

The upper end of the steering assembly 2 is connected to the output shaft of the steering motor 1 , and the upper end of the suspension assembly 3 is installed on the lower end of the steering assembly 2 . The wheel assembly 4 includes a wheel 41 and a mounting plate 42, the wheel 41 is provided with an in-wheel motor (not shown), the in-wheel motor is electrically connected to the ECU main controller 50 through a motor driver, and is used to provide the Describe the power that the wheel 41 advances. One end of the mounting plate 42 is fixed on one side of the wheel 41 , and the other end is fixed on the lower end of the suspension assembly 3 , so as to connect the wheel assembly 4 to the suspension assembly 3 . The output shaft of the steering motor 1, the center of rotation of the steering assembly 2, the center of rotation of the suspension assembly 3, and the lateral center of the wheel 41 are coaxially arranged and kept on the same straight line to ensure that the steering assembly 2 There will be no kingpin offset when turning, ensuring that the turning center remains unchanged.

The independent steering system 100 also includes a brake pedal and a drive pedal, a photoelectric encoder and a centering torque motor. The brake pedal and the drive pedal are used to collect the driver's driving intention in terms of vehicle speed. The photoelectric encoder collects the steering wheel angle to obtain the driver's driving intention for steering. The righting torque motor is used to provide feedback force to the steering wheel, simulating the driver's driving "road feel".

7 and 8, the independent steering system 100 also includes a shock absorbing and stabilizing assembly 5, the shock absorbing and stabilizing assembly 5 includes a first panel 51, a second panel 52 and a compression spring 53, and the compression spring 53 is clamped Between the first panel 51 and the second panel 52 , and lock the set distance by bolts 54 . The first panel 51 is fixed on the suspension assembly 3, and the second panel 52 is connected to the steering assembly 2 and fixed on the vehicle body for lateral support and shock absorption.

Specifically, referring to FIG. 4 , the steering assembly 2 includes a transmission shaft 21 , a slewing support bearing 22 , a square steel 23 , a countersunk ring 24 and a thrust ball bearing 25 . The slewing support bearing 22 has an inner ring and an outer ring that rotate independently of each other, and the transmission shaft 21 has a large end and a small end, and the slewing support bearing 22 is sleeved on the small end of the transmission shaft 21 and Pressed on the top of the big end, the inner ring of the slewing support bearing 22 and the big end of the transmission shaft 21 are provided with through holes (not marked). The small end of the transmission shaft 21 is connected to the output shaft of the steering motor 1, and its large end passes through the inner ring of the slewing support bearing 22 and the through hole on the large end of the transmission shaft 21 through bolts 26 in turn. , fixed on the suspension assembly 3, so as to realize the connection between the rotating assembly 2 and the suspension assembly 3.

The square steel 23 is sleeved on the big end of the transmission shaft 21, and is fixedly connected with the vehicle body. The slewing support bearing 22 is located inside the square steel 23, and the outer ring of the slewing support bearing 22 is fixed on On the square steel 23 , the thrust ball bearing 25 is sleeved on the big end of the transmission shaft 21 and located between the square steel 23 and the suspension assembly 3 . In the embodiment of the present invention, the thrust ball bearing 25 is a separable bearing, which includes a shaft ring and a seat ring. The shaft ring of the thrust ball bearing 25 is in interference fit with the transmission shaft 21, and the seat ring Excessive fit with the transmission shaft 21 , so that the seat ring of the thrust ball bearing 25 is relatively stationary, and the shaft ring rotates with the rotation of the transmission shaft 1 and the suspension assembly 3 . The thrust ball bearing 25 is used to act on the square steel 23 due to the impact force on the slewing support bearing 22 caused by the uneven road surface, so as to prevent the inner and outer rings of the slewing support bearing 22 from being damaged due to excessive impact force. separate.

The countersunk ring 24 is arranged between the square steel 23 and the thrust ball bearing 25, a groove 221 is provided on the outer ring of the slewing support bearing 22, and a through hole ( Not marked), the countersunk ring 24 is also provided with a corresponding groove 241. The bolt 27 passes through the outer ring of the slewing support bearing 22, the square steel 23 and the countersunk ring 24 in sequence, and is threadedly connected with the nut 28, and the upper end of the bolt 27 is accommodated in the recess of the outer ring of the slewing support bearing 22. In the groove 221, the lower end of the bolt 27 and the nut 28 are jointly accommodated in the groove 241 on the countersunk ring 24, and the thickness and radius of the countersunk ring 24 can be changed according to the actual needs of the electric vehicle. As long as the countersunk ring 24 is in transition fit with the transmission shaft 21 . The outer ring of the slewing support bearing 22 is fixed on the square steel 23 by the bolt 27 and the nut 28, and the impact on the slewing support bearing 22 is further applied to the square steel 23 to ensure that the slewing support bearing 22 There is no relative longitudinal displacement of the inner and outer rings to prevent the separation of the inner and outer rings.

Continuing to refer to FIG. 5 and FIG. 6 , the suspension assembly 3 includes a suspension upper panel 31 , a base 32 , a shock absorber 33 and a shock absorber fixing member 34 . The shock absorber fixing part 34 is evenly distributed under the suspension upper panel 31 and fixed on the suspension upper panel 31, and the shock absorber fixing part 34 is provided with a through hole 341, and the shock absorber fixing part 34 is provided with a through hole 341. The top of the shock absorber 33 has a positioning hole (not shown) and is located in the shock absorber fixing part 34, and the top of the shock absorber 33 passes through the through hole 341 of the shock absorber fixing part 34 by a bolt and The positioning hole on the top of the shock absorber 33 is fixed on the shock absorber fixing part 34 . There are several sleeves 321 on the base 32, and the central axis of each shock absorber fixing part 34 coincides with the central axis of a sleeve 321, so that the bottom of the shock absorber 33 is inserted into the sleeve 321, and Fixed in the sleeve 321 , the base 32 is fixed on the mounting plate 42 , so that there is no relative movement between the entire suspension assembly 3 and the mounting plate 42 of the wheel assembly 4 .

The suspension assembly 3 also includes a deep groove ball bearing 35, a connecting ring 36 and a spacer 37, the deep groove ball bearing 35 is sleeved on the base 32, and the spacer 37 is arranged on the deep groove ball The bottom of the bearing 35 is used to keep the position of the deep groove ball bearing 35 from slipping due to gravity. The connecting ring 36 is sleeved on the outer edge of the deep groove ball bearing 35 , and is overfitted with the deep groove ball bearing 35 so that the connecting ring 36 can move up and down along the axis of the deep groove ball bearing 35 . The deep groove ball bearing 35 , connecting ring 36 and gasket 37 are used to cooperate with the installation of the shock-absorbing and stabilizing assembly 5 , so that the movement and function of the entire system will not be disturbed or affected.

Specifically, the first panel 51 of the shock-absorbing and stabilizing assembly 5 is fixed on the connecting ring 36 , and the second panel 52 is fixed on the square steel 23 of the rotating assembly 2 , so as to be fixed to the vehicle body. The base 32 can move up and down while also rotating along its axis, and the connecting ring 36 is fixedly connected to the first panel 51 of the shock-absorbing and stabilizing assembly 5, so the connecting ring 36 can only move up and down. Rotate, and the movement of the connecting ring 36 and the base 32 does not affect each other. Therefore, after the shock-absorbing and stabilizing component 5 is welded and fixed to the suspension component 3, it can assist the suspension component 3 in shock absorption, and can also limit the relative position of the suspension component 3, ensuring that the suspension component 3 On the premise that the degree of freedom in steering is not constrained by the shock-absorbing and stabilizing assembly 5, the relative position of the suspension assembly 3 is limited, thereby preventing the danger of wheel deflection due to excessive torque during steering Working conditions ensure the stability of the mechanical structure of the entire steering system 100 .

Referring to FIG. 9 , the wheel assembly 4 further includes an in-wheel motor housing 43 , a backing plate 44 and an electromagnetic brake 45 . The hub motor housing 43 is sleeved on the hub motor and bolted to the wheel 41. The hub motor and the hub motor housing 43 have a protruding portion 431, and the protruding portion 431 passes through the wheel hub motor. The backing plate 44 is fixed on the mounting plate 42 with bolts. Both sides of the backing plate 44 are sandwiched between the mounting plate 42 and the hub motor housing 43, the backing plate 44 has a boss (not marked), and the electromagnetic brake 45 is sleeved on the boss. and the two sides of the electromagnetic brake 45 are interposed between the backing plate 44 and the hub motor housing 43 . One side of the backing plate 44 is fixed on the mounting plate 42 by bolts, the backing plate 44 is in interference fit with the protruding portion 431, and one side of the electromagnetic brake 45 is connected to the backing plate 44. The boss has an interference fit and is bolted to the backing plate 44 , and the other side of the electromagnetic brake 45 is screwed to the hub motor housing 43 .

The wheel assembly 4 also includes a code disc 46, the code disc 46 is fixed on one side of the hub motor housing 43, and is located between the hub motor housing 43 and the electromagnetic brake 45, for passing through the Hall The sensor measures the rotational speed of the wheel 41 .

During specific work, the driver's driving intention for vehicle speed is collected through the brake pedal and the driving pedal, and the steering wheel angle is collected through the photoelectric encoder to obtain the driver's driving intention for steering. After receiving and processing the driving intention transmitted by the driver, the ECU main controller 50 calculates the torque that the rotating motor 1 needs to provide and the driving torque that the hub motor needs to provide, and drives the steering motor 1 to drive each wheel 41 to turn. The motor provides the driving force of the wheel 41, and the centering torque motor provides feedback force to the steering wheel. Therefore, the independent steering system 100 can not only steer independently but also completely match the wheels of the hub electric vehicle. In addition, since the rotation angle of the steering motor 1 is specifically controlled by the ECU main controller 50, the rotation angle of each wheel 41 can be precisely controlled, thereby avoiding the problem of missing steering.

In summary, the embodiment of the present invention provides an independent steering system 100 for an electric vehicle, which includes a vehicle electronic control system, a steering motor 1 , a steering assembly 2 , a suspension assembly 3 and a wheel assembly 4 . The vehicle electronic control system receives the driver's driving intention and implements the driver's instructions, the steering assembly 2 is connected to the lower end of the steering motor 1, and the suspension assembly 3 is connected to the lower end of the steering assembly 2 , the mounting plate 42 of the wheel assembly 4 is connected to the lower end of the suspension assembly 3, the output shaft of the steering motor 1, the rotation center of the steering assembly 2, the rotation center of the suspension assembly 3 and the side of the wheel 41 Set coaxially towards the center and keep on the same straight line, so as to ensure that the kingpin offset will not occur when the steering assembly 2 is turning, and ensure that the turning center remains unchanged. The ECU main controller 50 is used to receive and process the driving intention transmitted by the driver. Through the control of the ECU main controller 50, the steering motor 1 of the wheels is respectively driven to rotate by a corresponding angle, and the rotation of the steering motor 1 drives The steering assembly 2 , the suspension assembly 3 and the wheels 41 rotate corresponding angles, and the rotation angle of each steering motor 1 is controlled by the ECU main controller 50 , so as to realize the individual steering of each wheel. At the same time, the ECU main controller 50 controls the in-wheel motors to provide power to drive the wheels 41 forward, so that the independent steering system 100 is completely matched with the wheels of the in-wheel electric vehicle. In addition, since the rotation angle of the steering motor 1 is specifically controlled by the ECU main controller 50, the rotation angle of each wheel 41 can be precisely controlled, thereby avoiding the problem of missing steering.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (10)

1. a kind of independent steering system of electric automobile, including car load electric-control system and vehicle wheel component, the automatically controlled system of the car load System includes ECU, and the vehicle wheel component includes wheel, it is characterised in that also include：

Steer motor, the steer motor is electrically connected with the ECU；

Steering assembly, the upper end of the steering assembly is connected with the output shaft of the steer motor；

Suspended rack assembly, the upper end of the suspended rack assembly is arranged on the lower end of the steering assembly；

The vehicle wheel component also includes installing plate, and wheel hub motor is provided with the wheel, and the wheel hub motor is electrically connected with the ECU Connect, the output shaft of the wheel hub motor is connected with the wheel drive, one end of the installing plate is fixed on the one of the wheel Side, its other end is fixed in the lower end of the suspended rack assembly, and the output shaft of the steer motor, the rotation of steering assembly The heart, the coaxial setting in the lateral center of the center of rotation of suspended rack assembly and the wheel, and be maintained on same straight line.

2. the independent steering system of electric automobile as claimed in claim 1, it is characterised in that the suspension system also includes using In the stable component of the damping of lateral support and damping, the stable component of the damping includes first panel, second panel and stage clip, institute State stage clip to be clamped between the first panel and second panel, and locked by bolt, the first panel is fixed on described On suspended rack assembly, the second panel is connected and fixed on vehicle body with the steering assembly.

3. the independent steering system of electric automobile as claimed in claim 1, it is characterised in that the steering assembly includes transmission Axle and slewing bearing, the slewing bearing has the inner ring of separate rotation and outer ring, and the power transmission shaft has Stub end and little head end, the slewing bearing is set on the little head end of the power transmission shaft and is pressed on the stub end Through hole is offered on the stub end of top, the inner ring of the slewing bearing and the power transmission shaft, the power transmission shaft Little head end is connected with the output shaft of the steer motor, and its stub end is interior by slewing bearing described in screw bolt passes Through hole on circle and the power transmission shaft stub end, is fixed on the suspended rack assembly.

4. the independent steering system of electric automobile as claimed in claim 3, it is characterised in that the steering assembly also includes side Steel and thrust ball bearing, the square steel is set on the stub end of the power transmission shaft, and is fixedly connected with vehicle body, the revolution Support bearing is located inside the square steel, and the outer ring of the slewing bearing is fixed on the square steel, the thrust ball axle Bearing sleeve is located on the stub end of the power transmission shaft, and between the square steel and the suspended rack assembly.

5. the independent steering system of electric automobile as claimed in claim 3, it is characterised in that it is heavy that the steering assembly also includes Headring, the countersunk head ring is arranged between the square steel and the thrust ball bearing, is opened on the outer ring of the slewing bearing Groove is provided with, through hole is offered in the groove, corresponding groove is also offered on the countersunk head ring, by screw bolt passes The outer ring of the slewing bearing, square steel and countersunk head ring, are connected with nut thread, and the upper end of the bolt is housed in institute State in the groove of slewing bearing outer ring, the lower end of the bolt and the nut are housed on the countersunk head ring jointly In groove.

6. the independent steering system of electric automobile as claimed in claim 2, it is characterised in that the suspended rack assembly includes suspension Top panel, base, damper and and damper fixture, the damper fixture is evenly distributed on the suspension top panel Lower section and be fixed on the suspension top panel, through hole, the top of the damper are offered on the damper fixture With location hole and in the damper fixture, the top of the damper is fixed by bolt through the damper Location hole at the top of the through hole of part and the damper is fixed on the damper fixture, is had on the base some The center overlapping of axles of sleeve, the central shaft of each damper fixture and a sleeve, the bottom insertion institute of the damper Sleeve is stated, and is fixed in the sleeve, the base is fixed on the installing plate.

7. the independent steering system of electric automobile as claimed in claim 6, it is characterised in that the suspended rack assembly also includes deep Ditch ball bearing, connection ring and pad, the deep groove ball bearing is set on the base, and the pad is arranged on the zanjon The lower section of ball bearing, the connection ring is set in the outer rim of the deep groove ball bearing, and can be along the axis of the deep groove ball bearing Move up and down, the first panel is fixed in the connection ring.

8. the independent steering system of electric automobile as claimed in claim 1, it is characterised in that the vehicle wheel component also includes wheel Hub motor housing, backing plate and electromagnetic brake, the hub motor shell is set on the wheel hub motor and is fixed on jointly On the wheel, the wheel hub motor and the hub motor shell have convex extension part, and the convex extension part passes through the backing plate, peace It is mounted on the installing plate, the both sides of the backing plate are folded between the installing plate and the hub motor shell, the pad Plate has boss, and the electromagnetic brake is set on the boss, and the both sides of the electromagnetic brake are folded in the pad Between plate and the hub motor shell.

9. the independent steering system of electric automobile as claimed in claim 8, it is characterised in that the vehicle wheel component also includes using In the code-disc of measurement vehicle wheel rotational speed, the code-disc is fixed on the side of the hub motor shell, and positioned at the wheel hub motor Between shell and the electromagnetic brake.

10. the independent steering system of electric automobile as in one of claimed in any of claims 1 to 9, it is characterised in that the electricity The independent steering system of electrical automobile is also included for gathering brake pedal of the driver for the driving intention in terms of speed and drive Dynamic pedal, for gathering steering wheel angle to obtain photoelectric encoder of the driver for the driving intention in terms of steering, and For providing the aligning torque motor of feedback force to steering wheel.