CN206797043U - The multi-link lever suspension fork Direct wheel drives system of wheel hub motor direct-driving electric electrical automobile - Google Patents

Abstract

The multi-link suspension wheel side drive system of the hub motor direct drive type electric vehicle disclosed by the utility model includes tires, hubs and hub motors, the hub motors are connected to the hub through hub bolts, hub motor shafts, steering knuckles, upper and rear control Arm, upper front control arm, lower front control arm, lower rear control arm, shock absorber, the middle part of the steering knuckle is connected with the hub motor shaft through the bushing assembly, and the top of the steering knuckle is hingedly connected with the upper front control arm and upper rear control arm. The bottom of the steering knuckle is hingedly connected with the upper rear control arm and the lower rear control arm, the upper front control arm, the upper rear control arm, the lower front control arm, and the lower rear control arm are hingedly connected with the sub-frame, and the top of the shock absorber passes through the upper U-shaped The fork is hingedly connected with the sub-frame, and the bottom end is hingedly connected with the lower front control arm through the lower U-shaped fork. The utility model can not only meet the power demand of the electric vehicle, but also reduce the mass of the whole vehicle, improve the power transmission efficiency, and has the advantages of compact structure, good running stability and flexible maneuverability.

Description

Multi-link suspension wheel side drive system of in-wheel motor direct drive electric vehicle

technical field

The invention belongs to the field of chassis design and manufacture of electric vehicles, and in particular relates to a multi-link suspension wheel side drive system in which a hub motor directly drives an electric vehicle.

Background technique

Electric vehicles adopt the form of four-wheel independent drive of wheel hub motors, which can omit mechanical components including reducers, differentials and drive shafts, greatly reducing mechanical losses, saving space in the car, achieving lightweight, and reducing electric car curb quality.

The driving force of the hub motor direct drive electric vehicle can be directly and independently controlled, and the dynamic performance is better. However, the introduction of the hub motor also affects the structure and performance of the suspension system and braking system of the electric vehicle. The suspension system composed of in-wheel motors integrates the functions of driving, guiding, bearing and braking. Larger, affecting the driving and steering characteristics of the vehicle.

In order to solve such problems, the main research directions at home and abroad are the integrated design of the electric wheel and the separate design of the drive device of the wheel system. In the existing technology, the design of the electric vehicle drive system mainly focuses on the drive mode of the wheel motor, which separates the motor from the hub, and most of them are driven by the rear wheel. The suspension system adopts the direct drive of the hub motor and the four-wheel independent drive mode. less.

Contents of the invention

Purpose of the invention: The purpose of the invention is to address the deficiencies in the prior art and provide a multi-link suspension wheel side drive system for an in-wheel motor direct-drive electric vehicle, which can not only meet the power requirements of the electric vehicle, but also reduce the quality of the vehicle , improve power transmission efficiency, with compact structure, good driving stability and flexible maneuverability.

Technical solution: The multi-link suspension wheel side drive system of the in-wheel motor direct-drive type electric vehicle according to the present invention includes the in-wheel motor direct-drive drive system and the suspension assembly device; the in-wheel motor direct-drive drive system Including tires, hubs connected to tires and hub motors, hub motors are connected to hubs through hub bolts; suspension assembly includes hub motor shafts, steering knuckles, upper rear control arms, upper front control arms, lower front control arms, lower Rear control arm, shock absorber, the middle part of the steering knuckle is connected with the hub motor shaft through the bushing assembly, the top of the steering knuckle is hingedly connected with the upper front control arm and the upper rear control arm, and the bottom of the steering knuckle is connected with the upper rear control arm and lower rear control arm The upper front control arm, the upper rear control arm, the lower front control arm, and the lower rear control arm are hingedly connected to the sub-frame, the top of the shock absorber is hinged to the sub-frame through the upper U-shaped yoke, and the bottom end is connected to the sub-frame through the lower end. The U-shaped yoke is hingedly connected with the lower front control arm.

To further improve the above technical solution, the bushing assembly includes a No. 1 bushing, a No. 2 bushing, and a self-locking nut; The sleeve is set on the hub motor shaft to match its inner spline with the outer spline of the hub motor shaft. The positioning end face D of the No. The No. 1 shaft sleeve is provided with a steering knuckle thrust step along the outer periphery. The inner hole in the middle of the steering knuckle is set on the No. 1 shaft sleeve and is limited by the steering knuckle thrust step. The end surface of the No. 2 shaft sleeve is provided with several positioning protrusions. There is a conical mating surface along the outer cylindrical surface of the No. 2 shaft sleeve. The No. 2 shaft sleeve is axially fixed by the positioning boss corresponding to the positioning hole of the No. 1 shaft sleeve. The conical mating surface of the No. 2 shaft sleeve is pressed against the steering joint joint surface, the self-locking nut is connected with the screw thread of the hub motor shaft.

Further, the No. 2 bushing is provided with a steering knuckle fixing bolt hole, and the inner hole of the steering knuckle is provided with a threaded through hole corresponding to the steering knuckle fixing bolt hole. The bolts limit the circular motion of the No. 1 shaft sleeve, the No. 2 shaft sleeve and the steering knuckle.

Further, the No. 1 shaft sleeve is provided with a positioning hole a, a positioning hole b and a positioning hole c, and the adjacent included angles are 100º, 130º and 130º respectively; the No. 2 shaft sleeve is provided with a positioning boss a, a positioning boss Platform b, positioning boss c, the adjacent angles are 100º, 130º and 130º respectively.

Further, the in-wheel motor is connected to the brake disc through bolts, and a brake cylinder is fixed on the steering knuckle to brake the brake disc.

Further, the hub motor housing, the upper rear control arm, the upper front control arm, the lower front control arm, and the lower rear control arm are all made of aluminum alloy.

Further, the upper rear control arm, upper front control arm, lower front control arm, and lower rear control arm respectively pass through the outer ball joint of the upper rear control arm, the outer ball joint of the upper front control arm, the outer ball joint of the lower front control arm, The outer ball joint of the lower rear control arm is hinged with the steering knuckle; the upper rear control arm, upper front control arm, lower front control arm, and lower rear control arm pass through the inner hinge point of the upper rear control arm and the inner hinge point of the upper front control arm respectively. , the inner hinge point of the lower front control arm, the inner hinge point of the lower rear control arm and the subframe are hinged.

Beneficial effects: (1) The hub motor of the present invention is directly connected to the hub through the hub bolts, which not only simplifies the mechanism, cancels the traditional intermediate devices such as transmission, final reducer and transmission shaft, but also facilitates the heat dissipation of the hub motor. Model selection, power, and layout selection have more freedom of choice, which improves the versatility of in-wheel motors.

(2) The fixing device of the hub motor shaft and the steering knuckle is realized by the No. 1 shaft sleeve, the No. 2 shaft sleeve and the self-locking nut. The No. 1 shaft sleeve and the No. 2 shaft sleeve are fixed to the motor shaft through the inner spline. The transition fit of the No. 2 bushing is fixed with the steering knuckle. The outer surface of the No. 2 bushing is a conical surface, which is locked by a self-locking nut. The combination of the conical surface and the self-locking nut can eliminate the wear gap formed after long-term use.

(3) The multi-link suspension composed of the upper rear control arm, upper front control arm, lower front control arm, and lower rear control arm of the present invention has no physical kingpin in the actual guiding process, and then changes the angle of the virtual kingpin , to achieve adjustable kingpin parameters, realize the adjustment of kingpin inclination, kingpin caster and wheel camber, ensure steering portability, handling stability and reduce tire wear; design freedom is large, suspension wheel positioning parameters are easy Control, not only can meet the power demand of electric vehicles, but also can reduce the weight of the whole vehicle, improve the efficiency of power transmission, with compact structure, good driving stability and flexible maneuverability.

(4) The multi-link suspension and the hub motor housing are made of aluminum alloy, which not only meets the normal strength and rigidity requirements, reduces the weight of the vehicle, meets the lightweight design requirements of electric vehicles, but also has a compact structure and layout, which is conducive to space layout.

Description of drawings

Fig. 1 is a schematic structural diagram of a multi-link suspension wheel side drive system of an in-wheel motor direct drive electric vehicle proposed according to the present invention.

Fig. 2 is a schematic diagram of the fixed connection between the wheel hub and the hub motor.

Fig. 3 is a schematic diagram of the structure of the in-wheel motor shaft.

Fig. 4 is a structural diagram of the hub motor stator shaft and the No. 1 steering knuckle sleeve.

Fig. 5 is a structural diagram of the stator shaft of the hub motor and the No. 2 shaft sleeve of the steering knuckle.

Fig. 6 is an assembly and disassembly diagram of the multi-link suspension wheel side drive system of the in-wheel motor direct drive electric vehicle.

In the figure: 1-tire; 2-brake cylinder oil pipe connector; 3-brake cylinder vent bolt; 4-brake cylinder; 5-hub motor; 6-brake disc; 7-steering knuckle; 8 -upper rear control arm; 9-upper front control arm; 10-upper U-shaped fork; 11-coil spring upper pressure plate; 12-coil spring; 13-shock absorber; 14-coil spring lower tray; 15-wheel hub Motor shaft; 16-lower front control arm; 17-lower rear control arm; 18-hub; 19-hub bolt; 5-hub motor; Outer ball joint of control arm; 22-Inner hinge point of upper front control arm; 23-Inner hinge point of upper rear control arm; 24-Outer ball joint of upper rear control arm; 25-Steering knuckle and steering gear connection ball joint installation point; 26 -thread; 27-external spline; 28-end face A of No. 1 shaft sleeve; 29-cylindrical surface B; 30-thrust step of steering knuckle; Spline; 34-Positioning hole c; 35-No. 1 shaft sleeve end face C; 36-Positioning hole b; 37-No. 1 shaft sleeve positioning end face D; 38-No. 2 shaft sleeve end face E; 39-No. 2 shaft sleeve column 40-No. 2 shaft sleeve and steering knuckle positioning end face F; 41-Positioning boss b; 42-Positioning boss a; 43-No. 2 shaft sleeve and steering knuckle fixing bolt hole; 44-Positioning boss c; 45 -Brake disc and hub motor fastening bolt holes (5); 46-Brake disc and hub motor bolts (5); 47-No. 1 bushing; 48-No. 2 bushing and steering knuckle fixing bolts; 49 -Self-locking nut; 50-U-shaped yoke at the lower end; 51-Hinge device between the shock absorber and the lower end of the lower front control arm; 52-Inner hinge point of the lower rear control arm; 53-Outer ball joint of the lower front control arm; 54-Down Outer ball joint of the rear control arm; 55-No. 2 bushing; 56-brake cylinder and steering knuckle fixing bolt holes (2).

detailed description

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

Embodiment 1: The multi-link suspension wheel side drive system of the hub motor direct drive type electric vehicle provided by the present invention is made up of two parts, one is the hub motor direct drive type drive system fixedly connected with the wheel hub, and the other part is A suspension assembly device in which the hub motor shaft is fixedly connected to the steering knuckle and the multi-link.

The in-wheel motor direct-drive drive system includes a tire 1, a wheel hub 18, a brake disc 6, a brake cylinder 4, and an in-wheel motor 5; the in-wheel motor 5 is fixed on the rim of the wheel hub 18 through a hub bolt 19, and the outer rotor of the in-wheel motor 5 The rotational torque is transmitted to the hub 18 and the tire 1 through the hub bolts 19, driving the tire 1 to rotate synchronously; the outer rotor of the hub motor 5 is fixedly connected with the brake disc 6 through the bolt 46 passing through the bolt hole 45, and the hub motor 5 drives the brake disc 6 rotate synchronously, the rotational movement of the hub motor 5 is directly transmitted to the brake disc 6, the brake cylinder 4 is fixed on the steering knuckle 7 through bolts 56, the brake cylinder oil pipe joint 2 is connected to the brake system ABS-HCU, and the replacement system After moving the hydraulic fluid, the gas in the brake system pipeline is discharged through the brake cylinder bleed bolt 3. When the wheels are braked, the brake cylinder 4 completes the braking process of the brake disc 6, which realizes the braking process of the electric vehicle. Slow down and stop.

The suspension assembly includes hub motor shaft 15, upper rear control arm 8, upper front control arm 9, lower front control arm 16, lower rear control arm 17, steering knuckle 7; No. axle sleeve 55, self-locking nut 49 are connected with hub motor shaft 15, as shown in Figure 3, hub motor shaft 15 is provided with cylindrical surface B29, external spline 27, screw thread 26 successively along the axial direction; As shown in Figure 4, The No. 1 shaft sleeve 47 is a cylindrical body with a ring-shaped cross-section, with internal splines 33 inside, one end surface is a positioning end surface D27, and the outer periphery of the positioning end surface D27 extends out of the steering knuckle thrust step 30, and the other end surface C is uniformly provided with positioning holes a32, positioning hole b36, positioning hole c34, the included angles between positioning hole a32, positioning hole b36, and positioning hole c34 are 100°, 130°, and 130° respectively, and the positioning end face D of the No. 1 shaft sleeve is positioned with the hub motor shaft 15 The end surface A is positioned, the inner spline is matched with the hub motor shaft 15 and the outer spline 27, and the thrust step 30 of the steering knuckle of the No. 1 bushing is positioned with the outer end face of the steering knuckle 7; There are positioning boss a42, positioning boss b41, and positioning boss c44, the angle between the positioning boss a42 and the positioning boss b41 is 100°, the angle between the positioning boss c44 and the positioning boss a42, and the positioning boss c44 The included angle with the positioning boss b41 is 130°, the cylinder surface of the No. 2 shaft sleeve is provided with a steering knuckle fixing bolt hole 43, and the cylinder surface separated from the steering knuckle fixing bolt hole 43 is the positioning end surface F40 of the No. 2 shaft sleeve and the steering knuckle. The end face F40 is a conical surface, and the No. 2 shaft sleeve 55 is axially fixed integrally with the No. 1 shaft sleeve 47 by the positioning boss a, the positioning boss b, and the positioning boss c corresponding to the positioning hole a, the positioning hole b, and the positioning hole c. , use the matching positioning of the above different angles to ensure that the positions of the No. 2 shaft sleeve 55 and the steering knuckle fixing bolt hole 43 and the inner spline 33 are relatively fixed after assembly; the No. 2 shaft sleeve presses the steering knuckle 7 with the positioning end face F , the self-locking nut 49 is screwed with the hub motor shaft 15 to limit the axial movement, the fixing bolt 48 passes through the threaded through hole, and the steering knuckle fixing bolt hole 43 restricts the No. 1 bushing 47, the No. 2 bushing 55 and the steering knuckle 7 The relative rotation in the radial direction realizes the integration of the hub motor shaft 15 and the steering knuckle 7 through the above-mentioned device.

The upper rear control arm 8 and the upper front control arm 9 are respectively hinged with the steering knuckle 7 through the outer ball joint 24 of the upper rear control arm and the outer ball joint 21 of the upper front control arm. The ball joint fixing bolt 20, the lower front control arm 16 and the lower rear control arm 17 are respectively hinged with the steering knuckle 7 through the outer ball joint 21 of the lower front control arm and the outer ball joint 24 of the lower rear control arm. The front control arm 9, the lower front control arm 16, and the lower rear control arm 17 respectively pass through the inner hinge point 22 of the upper rear control arm, the inner hinge point 23 of the upper front control arm, the inner hinge point 50 of the lower front control arm, and the inner hinge point of the lower rear control arm. The hinge point 52 is hinged with the subframe, and the steering knuckle 7 is connected to the steering gear assembly through the steering gear connection ball joint mounting point 25 . The bottom end of the shock absorber is hinged with the lower front control arm 16 through the lower U-shaped yoke 51, and the top end is hinged with the sub-frame through the upper U-shaped yoke 10. The coil spring 12 is limited by the coil spring lower tray 14 and the upper pressure plate 11. bit fixed. Wheel alignment parameters can be adjusted by changing the relative positions of each control arm and the hinge point of the sub-frame.

As stated above, while the invention has been shown and described with reference to certain preferred embodiments, this should not be construed as limiting the invention itself. Various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (7)

1. the multi-link lever suspension fork Direct wheel drives system of wheel hub motor direct-driving electric electrical automobile, it is characterised in that：Including wheel hub motor Direct-drive type drive system and suspension assembly device；The wheel hub motor direct-drive type drive system includes tire, is connected with tire Wheel hub and wheel hub motor, wheel hub motor are connected by boss bolt with wheel hub；Suspension assembly device includes wheel motor shaft, turned Xiang Jie, upper rear control arm, control arm of going forward, lower preceding control arm, lower rear control arm, shock absorber, knuckle middle part passes through axle sleeve group Part is connected with wheel motor shaft, at the top of knuckle with control arm of going forward, it is upper after control arm be hinged and connected, knuckle bottom and it is upper after Control arm, lower rear control arm are hinged and connected, control arm of going forward, upper rear control arm, lower preceding control arm, lower rear control arm and subframe Be hinged and connected, shock absorber top by upper end it is U-shaped section fork with subframe be hinged and connected, bottom by lower end it is U-shaped section fork with it is lower before Control arm is hinged and connected.

2. the multi-link lever suspension fork Direct wheel drives system of wheel hub motor direct-driving electric electrical automobile according to claim 1, it is special Sign is：The sleeve assembly includes No.1 axle sleeve, No. two axle sleeves, self-locking nuts；The wheel motor shaft is set successively vertically There are face of cylinder B, external splines, screw thread, No.1 axle sleeve is arranged in wheel motor shaft with its internal spline and wheel motor shaft external splines Coordinate, the positioning end face D of No.1 axle sleeve is spacing to be positioned in wheel motor shaft face of cylinder B end face, other end C provided with several Hole, No.1 axle sleeve are circumferentially provided with knuckle thrust step, and the endoporus in the middle part of knuckle, which is set on No.1 axle sleeve, is diverted section Thrust step is spacing, and No. two end face of shaft bush are provided with several positioning boss, matches somebody with somebody along No. two axle sleeve outer cylinders provided with one section of cone Conjunction face, No. two axle sleeves correspond to No.1 axle sleeve positioning hole with positioning boss and carry out axial restraint, the conical mating surface of No. two axle sleeves Compress knuckle mating surface, the screw thread mating connection of self-locking nut and wheel motor shaft.

3. the multi-link lever suspension fork Direct wheel drives system of wheel hub motor direct-driving electric electrical automobile according to claim 2, it is special Sign is：No. two axle sleeves are provided with knuckle fixed bolt hole, and the knuckle endoporus corresponds to knuckle fixed bolt hole Provided with tapped through hole, No.1 axle sleeve, No. two axles are limited by the fixing bolt through tapped through hole, knuckle fixed bolt hole Set, the circular motion of knuckle.

4. the multi-link lever suspension fork Direct wheel drives system of wheel hub motor direct-driving electric electrical automobile according to claim 2, it is special Sign is：It is respectively 100o, 130o and 130 that the No.1 axle sleeve, which is provided with positioning hole a, positioning hole b and positioning hole c, adjacent angle, º；No. two axle sleeves are provided with positioning boss a, positioning boss b, positioning boss c, and adjacent angle is respectively 100o, 130o and 130 º。

5. the multi-link lever suspension fork Direct wheel drives system of wheel hub motor direct-driving electric electrical automobile according to claim 1, it is special Sign is：The wheel hub motor is connected by bolt with brake disc, and be fixed with brake cylinder on the knuckle enters to brake disc Row braking.

6. the multi-link lever suspension fork Direct wheel drives system of wheel hub motor direct-driving electric electrical automobile according to claim 1, it is special Sign is：The hub motor shell and upper rear control arm, control arm of going forward, lower preceding control arm, lower rear control arm use aluminium Alloy material.

7. the multi-link lever suspension fork Direct wheel drives system of wheel hub motor direct-driving electric electrical automobile according to claim 1, it is special Sign is：The upper rear control arm, control arm of going forward, lower preceding control arm, lower rear control arm pass through on the outside of upper rear control arm respectively Bulb on the outside of bulb, control arm of going forward, bulb on the outside of lower preceding control arm, it is lower after on the outside of control arm bulb cut with scissors with the knuckle Connect；Control arm after upper, control arm of going forward, lower preceding control arm, it is lower after control arm respectively by pin joint on the inside of control arm after upper, on Pin joint, lower preceding control arm inner side pin joint, lower rear control arm inner side pin joint and subframe are hinged on the inside of preceding control arm.