CN110884312A - An electric vehicle and its multi-link rear suspension - Google Patents

Abstract

The invention discloses a multi-connecting-rod rear suspension for an electric automobile, which comprises an auxiliary frame and a guide mechanism for guiding wheels, wherein the guide mechanism comprises a wheel bracket, a front upper control arm, a front lower control arm, a rear upper control arm and a rear lower control arm, and two ends of the rear four are respectively hinged with the wheel bracket and the auxiliary frame of the electric automobile; the front upper control arm and the front lower control arm are arranged on the front side of the wheel center and respectively arranged above the wheel center and below the wheel center; the rear upper control arm and the rear lower control arm are arranged on the rear side of the wheel center and respectively arranged above the wheel center and below the wheel center; the guide mechanism also comprises a front binding rod, and two ends of the front binding rod are connected with the wheel bracket and a wheel steering mechanism of the auxiliary frame; the guide mechanism forms a five-link structure, has no longitudinal arm, has small longitudinal space, is more favorable for longitudinal space arrangement, can arrange a battery with larger volume in a rear suspension transverse space for the electric automobile, and greatly improves the cruising ability of the automobile if the capacity of the corresponding battery is larger.

Description

An electric vehicle and its multi-link rear suspension

technical field

The invention relates to the technical field of automobile suspension, in particular to an electric vehicle and its multi-link rear suspension.

Background technique

The rear suspension system is an important system that transmits vertical, longitudinal and lateral forces to the vehicle body. During the operation of the vehicle, it must meet the requirements of steering stability such as wheel jump and the roll and understeer caused by the reverse movement of the wheels on both sides. . At the same time, the vibration from the ground is absorbed in the vertical direction to meet the passengers' requirements for ride comfort. The suspension system design needs to meet the comfort of the vehicle when the number of passengers is different.

At present, the widely used rear suspension is mainly four-link suspension, among which the blade arm type four-link suspension is a typical structure of four-link suspension, which mainly includes three transverse arms and one longitudinal arm, three transverse arms. The arm is connected between the subframe and the wheel bracket through a bushing), the longitudinal arm is arranged along the longitudinal direction of the vehicle, the front end is connected with the body through a bushing, and the rear end is connected with the wheel bracket through a bushing or bolt.

Due to the arrangement of the longitudinal arms of the four-link suspension in the prior art, the battery box of the pure electric rear-wheel drive vehicle cannot be installed in the rear suspension position, resulting in a waste of space behind the suspension, that is, the four-link suspension cannot meet the requirements of the pure electric rear-wheel drive vehicle. Battery and drive shaft space requirements.

In addition, with the increase of the number of occupants of the rear axle, the four-link suspension reduces the yielding characteristics of the rear suspension; at the same time, the longitudinal load is transmitted to the body through a certain flexible longitudinal arm, which reduces the riding comfort on rough roads.

Therefore, how to provide a suspension device suitable for electric vehicles, which can optimize the arrangement of the batteries on the premise of realizing a better shock absorption function, is a technical problem to be solved urgently by those skilled in the art.

SUMMARY OF THE INVENTION

The invention provides a multi-link rear suspension for an electric vehicle, which includes a subframe and a guide mechanism for guiding the wheels. The guide mechanism includes a wheel bracket, a front upper control arm, a front lower control arm, a rear The upper control arm and the rear lower control arm, the two ends of the rear four are respectively hinged with the wheel bracket and the subframe of the electric vehicle; the front upper control arm and the front lower control arm are arranged on the front side of the wheel center , and are respectively located above and below the wheel center; the rear upper control arm and the rear lower control arm are arranged on the rear side of the wheel center, and are respectively located above and below the wheel center;

The multi-link rear suspension device further includes a toe-in rod, and both ends of the toe-in rod are connected to the wheel bracket and the wheel steering mechanism of the subframe.

The multi-link rear suspension device provided by the present invention has the following advantages:

First, the guide mechanism provided by the present invention is a five-link structure, and the rear suspension is a five-link rear axle, which has a simple structure, low cost, light weight and high riding comfort.

Second, the five-link rear suspension provided by the present invention can realize the rotation of the wheel at a certain angle, realize the function of rear wheel steering, reduce the low-speed turning diameter, and improve the driving stability of the high-speed vehicle.

Third, the five-link rear suspension provided by the present invention eliminates the longitudinal arms, and can provide good resistance to the rear axle avoidance characteristics by optimizing the installation angle of the front lower control arms and the spatial arrangement of the rear lower control arms.

Fourth, in the five-link rear suspension provided by the present invention, the control arms are all connected to the body through the sub-frame, and through the secondary vibration isolation, the vibration transmitted from the traditional longitudinal arm to the body is reduced, and the transmission of the road to the body is effectively reduced. Structure noise in the car.

Fifth, the five-link rear suspension provided by the present invention has no trailing arm, and the longitudinal space is small, which is more conducive to the longitudinal space arrangement. For electric vehicles, a larger battery can be arranged in the rear suspension lateral space, correspondingly. The capacity of the battery is also larger, which greatly improves the battery life of the vehicle.

Optionally, both ends of the front upper control arm, the front lower control arm, the rear upper control arm, the rear lower control arm, and the toe-in rod are connected to each other by ball hinges or bushings, respectively. The wheel bracket and the subframe.

Optionally, the rear lower control arm is further provided with a spring mounting seat and a shock absorber mounting seat, the spring mounting seat is used for cooperating with the vehicle spring, and the shock absorber mounting seat is used for the vehicle shock absorber. Match the installation.

Optionally, the spring mounting seat and the shock absorber mounting seat are disposed close to the wheel center of the wheel bracket.

Optionally, after assembly, the shock absorber and the vehicle spring are respectively located at the front and rear of the wheel center, and the included angle between the shock absorber and the vertical direction ranges from 5 degrees to 30 degrees.

Optionally, the connection point between the front upper control arm and the wheel bracket, the connection point between the rear upper control arm and the wheel bracket, and the longitudinal distance between the two connection points and the wheel center are all in the range of 80mm- 100mm.

Optionally, the connection point between the front upper control arm and the wheel bracket, the connection point between the front upper control arm and the sub-frame, the angle between the line connecting the two connection points and the lateral direction is less than or equal to 60 degrees; or /and,

The connection point between the front lower control arm and the wheel bracket, the connection point between the front lower control arm and the subframe, and the included angle between the connection line of the two connection points and the lateral direction is less than or equal to 60 degrees; or/and,

The connection point between the rear upper control arm and the wheel bracket, the connection point between the rear upper control arm and the subframe, and the included angle between the line connecting the two connection points and the lateral direction is less than or equal to 60 degrees; or/and,

The connection point between the rear lower control arm and the wheel bracket, the connection point between the rear lower control arm and the subframe, and the included angle between the line connecting the two connection points and the lateral direction is less than or equal to 60 degrees; or/and,

The connection point between the toe-in rod and the wheel bracket, the connection point between the toe-in rod and the wheel steering mechanism, and the included angle between the line connecting the two connection points and the lateral direction is less than 20 degrees.

Optionally, the system rigidity formed by the front upper control arm, the front lower control arm, the rear upper control arm, the rear lower control arm and the connection bushes at their respective ends is greater than the system rigidity formed by the toe-in bar and its ends .

Optionally, the skeleton of the subframe is composed of two longitudinal beams, a front beam and a rear beam that are fixedly connected to the two longitudinal beams; the front upper control arm, the front lower control arm, the rear upper control arm, the rear The inner ends of the lower control arms are connected to the respective said longitudinal beams adjacent thereto.

In addition, the present invention also provides an electric vehicle, comprising a wheel and a multi-link rear suspension, wherein the multi-link rear suspension is the multi-link rear suspension for an electric vehicle described in any one of the above.

Description of drawings

1 is a schematic structural diagram of a multi-link rear suspension for an electric vehicle in an embodiment of the present invention;

FIG. 2 is an exploded schematic view of the multi-link rear suspension for an electric vehicle shown in FIG. 1;

FIG. 3 is a schematic structural diagram of some components of the multi-link rear suspension for an electric vehicle shown in FIG. 1 .

Among them, in Figure 1 to Figure 3:

Stabilizer bar 1, rear upper control arm 2, toe bar 3, shock absorber 4, wheel bracket 5, rear lower control arm 6, spring mounting seat 61, shock absorber mounting seat 62, front lower control arm 7, frame Spring 8 , front upper control arm 9 , subframe 10 , longitudinal beam 11 , rear cross member 12 , front cross member 13 .

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Please refer to FIGS. 1 to 3 . FIG. 1 is a schematic structural diagram of a multi-link rear suspension for an electric vehicle according to an embodiment of the present invention; FIG. 2 is a multi-link rear suspension for an electric vehicle shown in FIG. 1 . Figure 3 is a schematic structural diagram of some components of the multi-link rear suspension for an electric vehicle shown in Figure 1.

The present invention provides a multi-link rear suspension for an electric vehicle. The rear suspension includes a subframe 10 and a guide mechanism for guiding the wheels. Each wheel corresponds to a set of guide mechanisms. role, to achieve the motion guidance of the wheel.

The guiding mechanism in the present invention mainly includes a wheel bracket 5 , a front upper control arm 9 , a front lower control arm 7 , a rear upper control arm 2 , and a rear lower control arm 6 . The subframe 10 of the automobile is hinged; the front upper control arm 9 and the front lower control arm 7 are arranged on the front side of the wheel center, and are respectively located above and below the wheel center; the rear upper control arm 2 and the rear lower control arm 6 are arranged On the rear side of the wheel center, and respectively above and below the wheel center.

The multi-link rear suspension device further includes a toe-in rod 3, and both ends of the toe-in rod 3 are connected to a wheel bracket 5 and a wheel steering mechanism.

The frame of the subframe 10 may include two longitudinal beams 11 , a front beam 13 and a rear beam 12 that are fixedly connected to the two longitudinal beams. Compared with the longitudinal arms provided in the rear suspension in the prior art, the outer parts of the suspension in the present invention can pass through the front upper control arm 9, the front lower control arm 7, the rear upper control arm 2, the rear lower control arm 6, the front The tow bar 3 is connected to the sub-frame 10, which can not only guide the movement vertically along the shock absorber 4 and the frame spring, but also can ensure that no longitudinal arms need to be provided through the above configuration, thereby having the following advantages:

Sixth, the guide mechanism provided by the present invention is a five-link structure, and the rear suspension is a five-link rear axle, which has a simple structure, low cost, light weight and high riding comfort.

Seventh, the five-link rear suspension provided by the present invention can realize the rotation of the wheel at a certain angle, realize the function of rear wheel steering, reduce the low-speed turning diameter, and improve the driving stability of the high-speed vehicle.

Eighth, the five-link rear suspension provided by the present invention eliminates the longitudinal arm, and can provide good resistance to the rear axle avoidance characteristics by optimizing the installation angle of the front lower control arm 7 and the spatial arrangement of the rear lower control arm 6 .

Ninth, in the five-link rear suspension provided by the present invention, the control arms are all connected to the body through the sub-frame 10, and through the secondary vibration isolation, the vibration transmitted from the traditional longitudinal arm to the body is reduced, and the transmission on the road surface is effectively reduced structure-borne noise into the vehicle.

Tenth, the five-link rear suspension provided by the present invention has no trailing arm, and the longitudinal space is small, which is more conducive to the longitudinal space arrangement. For electric vehicles, a larger battery can be arranged in the rear suspension lateral space, correspondingly. The capacity of the battery is also larger, which greatly improves the battery life of the vehicle.

In order to increase the flexibility of the system, both ends of the front upper control arm 9 , the front lower control arm 7 , the rear upper control arm 2 , the rear lower control arm 6 and the toe rod 3 are connected to the wheel brackets 5 by ball joints or bushings, respectively. , Subframe 10 .

That is to say, the two ends of the front upper control arm 9 can be respectively connected to the wheel bracket 5 and the subframe 10 through ball joints or bushings; the two ends of the front lower control arm 7 can be respectively connected to the wheels through ball joints or bushings Bracket 5 and sub-frame 10; both ends of the rear upper control arm 2 can be connected to the wheel bracket 5 and sub-frame 10 respectively through ball hinges or bushings; both ends of the rear lower control arm 6 can be connected by ball hinges or bushings The sleeves are respectively connected to the wheel bracket 5 and the sub-frame 10 ; the two ends of the toe-in rod 3 can be connected to the wheel bracket 5 and the wheel steering mechanism of the sub-frame 10 respectively through ball joints or bushings.

The specific structure of the bushing and the specific installation method of the ball hinge are not described in detail herein, and those skilled in the art can fully understand and implement the technical solutions described herein based on the above description.

For the vehicle suspension, it must include vehicle springs 8 and shock absorbers 4 for shock absorption. Usually, the number of vehicle springs 8 is two, and the two vehicle springs 8 are arranged symmetrically along the central longitudinal plane. The number of the shock absorbers 4 is also two, and the two shock absorbers 4 are arranged symmetrically along the vehicle center longitudinal plane. In order to enable the vehicle spring 8 and the shock absorber 4 to exert as large a shock absorption effect as possible, the installation positions of the two can be set as follows.

In a specific implementation manner, the rear lower control arm 6 may be further provided with a spring mounting seat 61 and a shock absorber mounting seat 62, the spring mounting seat 61 is used for cooperating with the vehicle spring 8, and the shock absorber mounting seat 62 is used for To be installed in conjunction with the vehicle shock absorber 4.

The lower ends of the vehicle spring 8 and the shock absorber 4 are both supported on the rear lower control arm 6, which can improve the shock absorption performance as much as possible and improve the ride comfort of the vehicle.

In a preferred embodiment, the spring mounting seat 61 and the shock absorber mounting seat 62 are arranged close to the wheel center of the wheel bracket 5 ; practice has proved that the shock absorber 4 is arranged as close to the wheel center as possible to improve the movement efficiency of the shock absorber 4 , the lower end of the shock absorber 4 can be arranged on the rear lower control arm 6 or the wheel bracket 5 according to the comprehensive requirements of layout and performance, and the angle between the shock absorber 4 and the vertical is arranged between 5 degrees and 30 degrees; the spring can be arranged with the damping The damper 4 is integrated together, adopts the design method of air spring and active shock absorber, and can also be arranged separately between the rear lower control arm 6 or the wheel bracket 5 and the vehicle body.

Preferably, after assembly, the shock absorber 4 and the vehicle spring 8 are respectively located at the front and rear of the wheel center, and the included angle between the shock absorber 4 and the vertical direction ranges from 5 degrees to 10 degrees.

The outer parts of the multi-link rear suspension are connected to the subframe 10 through the front upper control arm 9, the front lower control arm 7, the rear upper control arm 2, the rear lower control arm 6, and the toe rod 3, along the shock absorber 4. The movement is guided vertically to the vehicle spring 8 . The front upper control arm 9 rotates around the inner mounting point connecting bush; the front lower control arm 7 rotates around the inner mounting point connecting bush; the rear upper control arm 2 rotates around the inner mounting point bushing; the rear lower control arm 6 rotates around the inner mounting point The connecting bushing rotates; the toe-in rod 3 rotates around the inner mounting point bushing; in the process of motion guidance, the movement between the rods is coordinated through flexible deformation through the bushing and the ball hinge. The shock absorber 4 and the vehicle spring 8 are separately arranged and installed between the rear lower control arm 6 and the vehicle body, and play the role of buffering shock and absorbing energy.

After many tests, it has been proved that the front upper control arm 9 and the rear upper control arm 2 are in the vertical direction, and the connection point between the front upper control arm 9 and the wheel bracket 5 and the connection point between the rear upper control arm 2 and the wheel bracket 5 meet the premise of the arrangement. Increasing the distance between the two and the wheel center as much as possible can improve the camber stiffness of the suspension. The connection point between the front upper control arm 9 and the wheel bracket 5 and the connection point between the rear upper control arm 2 and the wheel bracket 5, the longitudinal distance between the two and the wheel center is 80mm-100mm. Preferably, when the longitudinal direction is about 90mm in the front and rear of the wheel center, the in-use camber stiffness of the rear suspension is better.

As shown in Figure 3, the distance between the outer mounting point ① of the front upper control arm 9 and the outer mounting point ⑤ of the rear upper control arm 2 should be as large as possible.

In the above-mentioned embodiments, the connection point between the front upper control arm 9 and the wheel bracket 5, the connection point between the front upper control arm 9 and the sub-frame 10, the connection line between the two connection points and the lateral angle are preferably less than or equal to 60 degrees, more preferably The connecting line of the two connection points is within a range of 30° from the lateral angle, that is, the front upper control arm 9 extends from the wheel bracket 5 to the sub-frame 10 along the direction of 30° from the lateral direction.

As shown in FIG. 3 , the outer rear mounting point ① and the inner mounting point ② of the front lower control arm 7 are within an included angle of 60 degrees with the lateral direction of the vehicle.

Furthermore, the connection point between the front lower control arm 7 and the wheel bracket 5, the connection point between the front lower control arm 7 and the subframe 10, the connection line between the two connection points and the lateral angle are less than or equal to 60 degrees, that is to say, the front The outer mounting point ③ and the inner mounting point ④ of the lower control arm 7 extend from the wheel bracket 5 to the subframe 10 along the vehicle transverse direction within an included angle of 60 degrees with the vehicle transverse direction.

Similarly, the connection point between the rear upper control arm 2 and the wheel bracket 5, the connection point between the rear upper control arm 2 and the subframe 10, the connection line and the lateral angle between the two connection points can also be less than or equal to 60 degrees, that is, the outer mounting point ⑤ and the inner mounting point ⑥ of the rear upper control arm 2 extend from the wheel frame to the subframe 10 within a 60-degree angle with the vehicle lateral direction.

Optionally, the connection point between the rear lower control arm 6 and the wheel bracket 5, the connection point between the rear lower control arm 6 and the sub-frame 10, the connecting line and the lateral angle between the two connection points are less than or equal to 60 degrees. , that is, the outer mounting point ⑦ and the inner mounting point ⑧ of the rear lower control arm 6 are within an included angle of 60 degrees with the lateral direction of the vehicle, preferably within a range of 30 degrees, extending from the wheel frame to the sub-frame 10 in the lateral direction of the vehicle .

The toe-in bar 3 is as far away from the wheel center as possible in the longitudinal direction to improve the toe-in rigidity; the vertical position can be located above or below the wheel center according to the needs of the arrangement. The connection point between the toe-in rod 3 and the wheel bracket 5, the connection point between the toe-in rod 3 and the subframe 10 or the rear wheel steering mechanism, the connecting line of the two connection points and the lateral angle are less than 20 degrees, That is, the outer mounting point ⑨ of the toe-in bar 3 and the inner mounting point ⑩ of the toe-in bar 3 extend from the wheel frame along the lateral direction of the vehicle to the vehicle within a range of 20 degrees, preferably within a range of 10 degrees. On the subframe 10 or on the rear wheel steering machine.

In the selection of system rigidity, the system rigidity formed by the front upper control arm 9, the front lower control arm 7, the rear upper control arm 2, the rear lower control arm 6 and the connection bushes at their respective ends is greater than that of the toe-in bar 3 and its ends. The rigidity of the system formed by the inner and outer parts, that is, the rigidity of the toe bar 3 system is the smallest (it should be noted that the toe bar 3 system described here refers to the system formed by the toe bar 3 and the inner and outer connecting bushes), the front upper control arm 9. The front lower control arm 7, the rear upper control arm 2, and the rear lower control arm 6 have the highest system rigidity (the rigidity of the upper and lower control arms and the inner and outer connecting bushes). The change of the camber angle and the toe angle are beneficial to the stability of the vehicle.

As mentioned above, the skeleton of the sub-frame 10 can be composed of two longitudinal beams and a front beam and a rear beam that are fixedly connected to the two longitudinal beams; the front upper control arm 9, the front lower control arm 7, the rear upper control arm 2, the rear The inner ends of the lower control arms 6 are connected to corresponding longitudinal beams adjacent thereto.

As mentioned above, the multi-link rear suspension device may further include a stabilizer bar 1, two ends of the stabilizer bar 1 are connected to the subframe, specifically, the two ends of the stabilizer bar 1 may be respectively connected to the two longitudinal beams 11 of the subframe.

On the basis of the upper multi-link rear suspension, the present invention also provides an electric vehicle, comprising a wheel and a multi-link rear suspension, wherein the multi-link rear suspension is any one of the above-mentioned ones for Multi-link rear suspension for electric vehicles.

For information on other aspects of electric vehicles, please refer to the prior art, which will not be repeated in this article.

Since the electric vehicle has the above-mentioned multi-link rear suspension, the electric vehicle also has the above-mentioned technical effect of the multi-link rear suspension.

It should be noted that, in this paper, the length direction of the vehicle is defined as the longitudinal direction, the width direction of the vehicle is defined as the lateral direction, the corresponding height direction is the vertical direction, the side close to the wheel of the vehicle is outside, and the side close to the longitudinal center plane of the vehicle is defined as the inside. . The definitions of the above aspects are only for the purpose of describing the technical solutions concisely and clearly, so that those skilled in the art can better understand the technical solutions herein.

The electric vehicle and its multi-link rear suspension provided by the present invention have been described in detail above. The principles and implementations of the present invention are described herein by using specific examples, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (10)

1. The multi-connecting-rod rear suspension for the electric automobile is characterized by comprising an auxiliary frame (10) and a guide mechanism for guiding wheels, wherein the guide mechanism comprises a wheel support (5), a front upper control arm (9), a front lower control arm (7), a rear upper control arm (2) and a rear lower control arm (6), and two ends of the rear four arms are respectively hinged with the wheel support (5) and the auxiliary frame (10) of the electric automobile; the front upper control arm (9) and the front lower control arm (7) are arranged on the front side of the wheel center and respectively arranged above the wheel center and below the wheel center; the rear upper control arm (2) and the rear lower control arm (6) are arranged on the rear side of the wheel center and respectively arranged above the wheel center and below the wheel center;

the guide mechanism further comprises a front binding rod (3), and two ends of the front binding rod (3) are connected with the wheel support (5) and the wheel steering mechanism of the auxiliary frame (10).

2. The multi-link rear suspension for electric vehicles according to claim 1, wherein both ends of the front upper control arm (9), the front lower control arm (7), the rear upper control arm (2), the rear lower control arm (6), and the front toe rod (3) are respectively connected to the wheel carrier (5) and the sub-frame (10) through ball joints or bushings.

3. The multi-link rear suspension for electric vehicles according to claim 2, wherein the rear lower control arm (6) is further provided with a spring mount (61) and a damper mount (62), the spring mount (61) being adapted to be fitted with a vehicle spring (8), and the damper mount (62) being adapted to be fitted with a vehicle damper (4).

4. The multi-link rear suspension for an electric vehicle according to claim 3, wherein the spring mount (61) and the damper mount (62) are disposed near a wheel center of the wheel carrier (5).

5. The rear multi-link suspension for electric vehicles according to claim 3 or 4, wherein the shock absorber (4) and the vehicle spring (8) are located respectively in front of and behind the wheel center when assembled, and the angle of the shock absorber (4) to the vertical is in the range of 5 to 30 degrees.

6. The multi-link rear suspension for electric vehicles according to claim 2, characterized in that the longitudinal distance between the connection point of the front upper control arm (9) to the wheel carrier (5) and the connection point of the rear upper control arm (2) to the wheel carrier (5) is in the range of 80mm to 100 mm.

7. The multi-link rear suspension for electric vehicles according to claim 2, wherein the connecting point of the upper front control arm (9) to the wheel bracket (5) and the connecting point of the upper front control arm (9) to the subframe (10) have a line that forms an angle of 60 degrees or less with the lateral direction; and/or the first and/or second light sources,

the connecting point of the front lower control arm (7) and the wheel bracket (5) and the connecting point of the front lower control arm (7) and the auxiliary frame (10) form an included angle of less than or equal to 60 degrees with the transverse direction; and/or the first and/or second light sources,

the connecting point of the rear upper control arm (2) and the wheel bracket (5) and the connecting point of the rear upper control arm (2) and the auxiliary frame (10) form an included angle of less than or equal to 60 degrees with the transverse direction; and/or the first and/or second light sources,

the connecting point of the rear lower control arm (6) and the wheel bracket (5) and the connecting point of the rear lower control arm (6) and the auxiliary frame (10) form an included angle of less than or equal to 60 degrees with the transverse direction; and/or the first and/or second light sources,

the front binding rod (3) is connected with the wheel support (5), the front binding rod (3) is connected with the wheel steering mechanism, and the connecting line of the two connecting points and the transverse included angle are smaller than 20 degrees.

8. The multi-link rear suspension for electric vehicles according to claim 2, characterized in that the rigidity of the system formed by the front upper control arm (9), the front lower control arm (7), the rear upper control arm (2), the rear lower control arm (6) and the respective end connection bushings is greater than the rigidity of the system formed by the front toe rod (3) and its ends.

9. The multi-link rear suspension for electric vehicles according to claim 2, characterized in that the skeleton of the subframe (10) is composed of two longitudinal beams and a front cross beam (13) and a rear cross beam (12) fixedly connecting the two longitudinal beams; the inner ends of the front upper control arm (9), the front lower control arm (7), the rear upper control arm (2) and the rear lower control arm (6) are connected to the corresponding longitudinal beams close to the inner ends.

10. An electric vehicle comprising a wheel and a multi-link rear suspension, characterized in that the multi-link rear suspension is the multi-link rear suspension for an electric vehicle according to any one of claims 1 to 9.

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