CN114537067A - Rear suspension assembly, rear suspension structure and vehicle - Google Patents

Abstract

The invention relates to the technical field of vehicle suspensions, and discloses a rear suspension assembly, a rear suspension structure and a vehicle. The rear suspension assembly comprises a steering knuckle and a front upper control arm extending in the width direction of the vehicle, and the front upper control arm is connected with the steering knuckle; the connection location of the upper front control arm to the knuckle is such that the rear suspension assembly includes a battery pack access space located below the upper front control arm. After the rear suspension assembly is arranged on the vehicle, the battery pack stretches into the space, so that the occupation of the rear suspension assembly in the X-direction space of the vehicle can be effectively reduced, the rear end of the battery pack of the vehicle can stretch into the battery pack stretching-into space, the length of the battery pack in the X-direction is increased compared with the prior art, and the improvement of the endurance mileage of an electric vehicle such as a pure electric vehicle type or a hybrid vehicle type is facilitated.

Description

Rear suspension assembly, rear suspension structure and vehicle

technical field

The present invention relates to the technical field of vehicle suspension, in particular to a rear suspension assembly, a rear suspension structure and a vehicle.

Background technique

At present, the suspension structure of the vehicle can reduce the vibration of the vehicle and improve the ride comfort. For example, a four-link rear suspension in the prior art includes a rear steering knuckle and a rear bracket, the rear bracket includes a rear beam and a front beam, and the rear beam and the front beam are welded to connect the longitudinal beam, and at the same time, the rear steering knuckle The rear lower transverse arm is hingedly connected, the other end of the rear lower transverse arm is connected with the rear transverse beam, a spring seat is arranged on the rear transverse beam, and a spring is arranged between the spring seat and the rear lower transverse arm; the upper transverse arm is installed on the longitudinal beam Between the bracket and the lower transverse arm; one end of the upper transverse arm is hingedly connected with the rear steering knuckle, and the other end is connected with the lower front transverse arm mounting bracket; the trailing arm is rigidly connected with the rear steering knuckle.

In addition, with the rapid development of electric vehicles, electric vehicles using such rear suspensions generally have problems of heavier weight and shorter cruising range.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a rear suspension assembly, which can effectively reduce the space occupied in the X-direction of the vehicle compared with the prior art, and provide a space for the battery pack to extend, thereby compared with the prior art. The existing technology can increase the length of the battery pack in the X direction, thereby helping to improve the cruising range of electric vehicles such as pure electric vehicles.

In order to achieve the above object, the present invention provides a rear suspension assembly including a steering knuckle and a front upper control arm for extending in the vehicle width direction, wherein the front upper control arm is connected to the The steering knuckle is connected; the connection position of the front upper control arm on the steering knuckle is such that the rear suspension assembly includes a battery pack extending space under the front upper control arm.

In this technical solution, since the rear suspension assembly includes a steering knuckle and a front upper control arm for extending in the vehicle width direction, and the rear suspension assembly includes a battery pack under the front upper control arm into the space Therefore, after the rear suspension assembly is arranged on the vehicle, the battery pack extends into the space, which can effectively reduce the space occupied by the rear suspension assembly in the X direction of the vehicle, and the rear end of the battery pack of the vehicle can extend into the space. As far as the battery pack extends into the space, the length of the battery pack in the X direction is increased compared with the prior art, which is beneficial to improve the cruising range of electric vehicles such as pure electric vehicles or hybrid vehicles.

Further, the connection position of the front upper control arm on the steering knuckle is such that the front upper control arm is used to be arranged in front of the connecting line of the rear wheel hub and connected relative to the rear wheel hub in the vehicle height direction. position on the line.

Further, the rear suspension assembly includes a rear upper control arm, the front upper control arm and the rear upper control arm are used to be arranged in the front-rear direction of the vehicle, and the rear upper control arm is connected with the steering knuckle , wherein the front upper control arm and the rear upper control arm are used to connect with the same subframe cross member.

Further, the position height of the front upper control arm is close to the position height of the rear upper control arm, or the position height of the front upper control arm is the same as the position height of the rear upper control arm.

Further, the rear upper control arm is used to extend in the vehicle width direction, and the connection position of the rear upper control arm on the steering knuckle is such that the rear upper control arm is used to be arranged on the connecting line of the rear wheel center. The rear of the vehicle and at the position close to the line connecting the rear wheel centers in the vehicle height direction.

In addition, the rear suspension assembly includes a rear lower control arm, the rear upper control arm and the rear lower control arm are arranged in a vehicle height direction, and the rear lower control arm is connected with the steering knuckle, Wherein, the front upper control arm, the rear lower control arm and the rear upper control arm are used for connecting with the same subframe cross member.

Further, the length arm body of the rear lower control arm is used to extend in the vehicle width direction.

Further, the rear lower control arm is used to be located in the area just below the connecting line of the rear wheel center.

Further, the rear suspension assembly includes a rear suspension spring unit, the rear suspension spring unit is disposed on the rear lower control arm and located between the front upper control arm and the rear upper control arm .

Further, the rear upper control arm is configured to adjust the toe angle, and the rear lower control arm is configured to adjust the camber angle.

In addition, a bracket extending toward the rear in the front-rear direction of the vehicle protrudes from the steering knuckle, and the rear suspension assembly includes a damper, which is arranged on the bracket and located on the rear upper control arm and the rear of the rear lower control arm.

In addition, the present invention provides a rear suspension structure, the rear suspension structure includes a subframe beam and any one of the above rear suspension assemblies, wherein the front upper control arm and the subframe beam connect.

In this way, through any of the above-mentioned rear suspension assemblies, the length of the battery pack in the X direction is increased compared with the prior art, which is beneficial to improve the cruising range of electric vehicles such as pure electric vehicles or hybrid vehicles.

Further, the battery pack extends into the space and extends to the subframe beam.

Finally, the present invention provides a vehicle comprising a battery pack and any of the above-mentioned rear suspension structures, wherein the battery pack protrudes into the battery pack protruding space. In this way, as described above, the cruising range of the vehicle is effectively increased. Therefore, the overall quality of the vehicle is effectively improved.

Description of drawings

1 is a schematic structural diagram of a rear suspension structure provided by a specific embodiment of the present invention, wherein a rear suspension assembly provided by a specific embodiment of the present invention is shown;

FIG. 2 is a schematic structural diagram of the subframe beam and the trailing arm mounting bracket in FIG. 1 after being removed;

FIG. 3 is a schematic three-dimensional structure diagram of the battery pack of the vehicle extending into the space of the battery pack of FIG. 2;

Fig. 4 is the top view structure schematic diagram of Fig. 3;

FIG. 5 is a schematic view of the bottom view of FIG. 3 .

Description of reference numerals

1- Steering knuckle, 2- Rear upper control arm, 3- Rear lower control arm, 4- Front upper control arm, 5- Battery pack reaching space, 6- Rear suspension spring unit, 7- Bracket, 8- Damper , 9- Sub-frame cross member, 10- Towing arm, 11- Towing arm mounting bracket, 12- Battery pack, 21- Sub-frame cross-member connection end, 31- Sub-frame cross-member connection part, 41- Sub-frame cross-member connection Head, 81 - Damper body connection end.

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.

1-5, the rear suspension assembly provided by the present invention includes a steering knuckle 1 and a front upper control arm 4 for extending in the vehicle width direction, wherein the front upper control arm 4 is connected with the steering knuckle 1; the front upper control arm 4 is connected to the steering knuckle 1; The connection position of the upper control arm 4 on the steering knuckle 1 is such that the rear suspension assembly includes the battery pack extending space 5 under the front upper control arm 4 .

Since the rear suspension assembly includes the steering knuckle 1 and the front upper control arm 4 for extending in the vehicle width direction, and the rear suspension assembly includes the battery pack insertion space 5 located below the front upper control arm 4, therefore , after the rear suspension assembly is arranged on the vehicle, the battery pack extends into the space 5, which can effectively reduce the space occupied by the rear suspension assembly in the X direction of the vehicle, and the rear end of the battery pack 12 of the vehicle can be backward It extends and extends into the battery pack extending space 5, and is arranged below the front upper control arm 4, so that the length of the battery pack in the X direction is increased compared with the prior art, which is beneficial to improve electric vehicles such as pure electric vehicles. Or the cruising range of a hybrid model.

For example, in one embodiment, the battery pack extending into the space 5 may increase the length of the battery pack by about 140-180 mm in the X direction.

In addition, in one embodiment of the rear suspension assembly, the connection position of the front upper control arm 4 on the steering knuckle 1 is such that the front upper control arm 4 is used to be arranged in front of the connection line of the rear wheel center and in the vehicle The position in the height direction is higher than the connection line of the rear wheel center, so that the height of the battery pack extending into the space 5 can be increased, so that the height of the battery pack extending into the battery pack extending space 5 can be correspondingly increased. In order to further improve the battery pack cruising range of the vehicle.

In addition, referring to FIGS. 1 and 2 , the rear suspension assembly includes a rear upper control arm 2 , a front upper control arm 4 and a rear upper control arm 2 for arranging in the front-rear direction of the vehicle, and the rear upper control arm 2 and the steering knuckle 1 connection, wherein the front upper control arm 4 and the rear upper control arm 2 are used for connection with the same subframe cross member 9 . In this way, since the front upper control arm 4 and the rear upper control arm 2 are connected to the same subframe beam 9 in actual use, the structure of the subframe beam 9 can be simplified, so that the rear suspension assembly is assembled to form a rear The suspension structure is lighter and less expensive, and the reduction in weight can improve the electric range of the vehicle.

In this rear suspension assembly, the front upper control arm 4 may be in any desired position in the vehicle height direction (Z direction) as long as the battery pack insertion space 5 can be formed under the front upper control arm 4 .

For example, in one embodiment, the position height of the front upper control arm 4 is close to the position height of the rear upper control arm 2. In this way, since the installation height of the front upper control arm 4 is relatively high, the occupation of the front upper control arm 4 is avoided. Therefore, a battery pack extending space 5 can be formed under the front upper control arm 4 . Or, in another embodiment, the position height of the front upper control arm 4 is the same as the position height of the rear upper control arm 2. Similarly, since the installation height of the front upper control arm 4 is higher, the front upper control arm The control arm 4 occupies the space below, so that a battery pack insertion space 5 can be formed under the front upper control arm 4 . Of course, if permitted, the position height of the front upper control arm 4 may also be higher than the position height of the rear upper control arm 2 .

In addition, in one embodiment of the rear suspension assembly, the rear upper control arm 2 is used to extend in the vehicle width direction, and the connection position of the rear upper control arm 2 on the steering knuckle 1 makes the rear upper control arm 2 It is used to be placed behind the rear wheel center line and at a position close to the rear wheel center line in the vehicle height direction. This can correspondingly increase the space above the rear suspension assembly, so that the side members of the body do not need to be partially avoided.

In addition, referring to FIGS. 1 and 2 , the rear suspension assembly includes a rear lower control arm 3 , a rear upper control arm 2 and a rear lower control arm 3 for arranging in the vehicle height direction, and the rear lower control arm 3 and the steering knuckle 1 connection, wherein the front upper control arm 4 , the rear lower control arm 3 and the rear upper control arm 2 are used for connection with the same subframe cross member 9 . In this way, the front upper control arm 4 and the rear upper control arm 2 are used to be arranged in the front-rear direction of the vehicle, the rear upper control arm 2 and the rear lower control arm 3 are used to be arranged in the vehicle height direction, and the rear suspension assembly includes The battery pack under the control arm 4 extends into the space 5. Therefore, after the rear suspension assembly is arranged on the vehicle, the battery pack extends into the space 5, which can effectively reduce the space occupied by the rear suspension assembly in the X direction of the vehicle , and the rear end of the battery pack 12 of the vehicle can extend backward and into the battery pack insertion space 5, and be arranged below the front upper control arm 4, thus increasing the number of battery packs in the X direction compared to the prior art , which is beneficial to improve the cruising range of electric vehicles such as pure electric vehicles or hybrid vehicles. In addition, since the front upper control arm 4, the rear upper control arm 2 and the rear lower control arm 3 are respectively connected to the same subframe beam 9 in actual use, the structure of the subframe beam 9 can be simplified, so that the rear suspension The rear suspension structure formed by the assembly of the frame assembly is lighter in weight and lower in cost, and the reduction in weight can increase the electric range of the vehicle.

In addition, referring to FIGS. 1 , 2 , 4 and 5 , the length arm body of the rear lower control arm 3 is used to extend in the vehicle width direction. In this way, the space occupied by the rear lower control arm 3 in the X-direction can be reduced, thereby further increasing the X-direction length of the battery pack extending into the space 5 to accommodate more battery packs.

In addition, the rear lower control arm 3 can be arranged at any desired position. For example, in one embodiment, the rear lower control arm 3 is used to be located in the area just below the connection line of the rear wheel center, so this can further reduce the space occupied by the rear lower control arm 3 in the X direction, thereby further improving the The X-direction length of the battery pack extending into the space 5 is adjusted to accommodate the portion of the battery pack with a larger amount.

In addition, referring to FIGS. 1-5 , the rear suspension assembly includes a rear suspension spring unit 6 , which is provided on the rear lower control arm 3 and located between the front upper control arm 4 and the rear upper control arm 2 In this way, in FIG. 1, the upper end of the rear suspension spring unit 6 will be connected to the vehicle body, so that the rear suspension spring unit 6 is arranged between the vehicle body and the rear lower control arm 3, thereby raising the rear suspension damping performance of the assembly.

In addition, in the rear suspension assembly, the rear upper control arm 2 is provided for adjusting the toe-in angle, and the adjustment of the toe-in angle can be achieved in various ways, for example, in one way, eccentricity can be used The matching structure of the bolt and the waist-shaped hole can be adjusted. For example, an eccentric bolt is used at the inner end bush of the rear upper control arm 2, and the position of the rear upper control arm 2 is adjusted by adjusting the position of the eccentric bolt in the waist-shaped hole. So as to realize the adjustment of the toe angle. Therefore, the adjustment of the rear upper control arm 2 is more sensitive, which can solve the adjustment space problem of the adjustment tool, and can also increase the X-direction length of the battery pack of an electric vehicle such as a pure electric vehicle. In addition, the rear lower control arm 3 is provided for adjusting the camber angle. In this way, in the rear suspension assembly, the toe angle and the camber angle of the four-wheel alignment parameters of the vehicle can be adjusted by the rear upper control arm 2 and the rear lower control arm 3 respectively. As far as the toe angle and the camber angle are adjusted by the same adjustment rod, the adjustment method of the present application can make the adjustment more accurate. In addition, the rear upper control arm 2 and the rear lower control arm 3 can be relatively straight, so that the The molding process is simple and the cost is low.

In addition, in this rear suspension assembly, referring to FIGS. 1 and 5 , a bracket 7 extending toward the rear in the vehicle front-rear direction protrudes from the steering knuckle 1 , and the rear suspension assembly includes a damper 8 . The damper 8 It is provided on the bracket 7 and is located behind the rear upper control arm 2 and the rear lower control arm 3 . The damper body connection end 81 at the upper end of the damper 8 can be used for connection with the body. In this way, compared with the damper in the prior art, which is arranged on the rear lower control arm, in the present application, a bracket 7 is extended on the steering knuckle to install the damper, which can satisfy the adjustment of the track between the rear wheels , and it is convenient to assemble the calipers and springs to meet the required layout space requirements. At the same time, when the damper 8 is located behind the rear upper control arm 2 and the rear lower control arm 3, the distance from the wheel center will increase. , so that its damping stroke is increased, so that the comfort of the vehicle can be improved.

In addition, referring to FIGS. 1 and 2 , the rear suspension assembly may further include a trailing arm 10 arranged in the front-rear direction of the vehicle. For example, the front end of the trailing arm 10 may be connected to the trailing arm mounting bracket 11 through a bushing. The trailing arm 10 The rear end can be connected with the steering knuckle 9, for example, the rear end of the drag arm 10 is connected with the steering knuckle 9 by bolts.

In addition, the present invention provides a rear suspension structure, referring to FIG. 1 , the rear suspension structure includes a subframe beam 9 and any of the above-mentioned rear suspension assemblies, wherein the front upper control arm 4 and the subframe The beam 9 is connected. In this way, through any of the above-mentioned rear suspension assemblies, the length of the battery pack in the X direction is increased compared with the prior art, which is beneficial to improve the cruising range of electric vehicles such as pure electric vehicles or hybrid vehicles.

In addition, in the embodiment in which the rear suspension assembly includes the rear upper control arm 2 and the rear lower control arm 3, the front upper control arm 4, the rear upper control arm 2 and the rear lower control arm 3 are respectively associated with the same subframe cross member 9 Connection, for example, the sub-frame cross member connecting head 41 of the front upper control arm 4, the sub-frame cross member connecting end 21 of the rear upper control arm 2 and the sub-frame cross member connecting portion 31 of the rear lower control arm 3 are respectively connected with the same one. The subframe cross member 9 is connected. Therefore, since the front upper control arm 4, the rear upper control arm 2 and the rear lower control arm 3 are respectively connected with the same subframe cross member 9, thus, the well formed by requiring two cross members and two longitudinal beams is different from the prior art. Compared with the zigzag subframe, the rear suspension structure is lighter in weight and lower in cost, and the reduction in weight can increase the electric cruising range of the vehicle. The existing technology increases the length of the battery pack in the X direction, which is beneficial to improve the cruising range of electric vehicles such as pure electric vehicles or hybrid vehicles. Therefore, the rear suspension is compact in structure and light in weight, which is beneficial to be applied to electric vehicles such as pure electric vehicles, so that the length of the battery pack is greatly increased on the basis of satisfying the handling and comfort, and the vehicle is improved. It also has a great effect on the lightweight of the whole vehicle, reducing the cost of the whole vehicle.

In addition, in order to further increase the size of the battery pack extending space 5 in the X direction, the battery pack extending space 5 extends to the subframe beam 9, so that while further extending the X-direction length of the battery pack, the subframe beam 9 It can absorb the impact energy received by the rear of the vehicle, thereby forming a certain protection for the rear of the battery pack.

Finally, the present invention provides a vehicle such as a pure electric vehicle or a hybrid vehicle, which includes a battery pack 12 and any of the above-mentioned rear suspension structures, wherein the battery pack 12 extends into the battery pack extending space 5 . In this way, as mentioned above, the cruising range of the battery pack of the vehicle is effectively improved. Therefore, the overall quality of the vehicle is effectively improved.

For example, when the battery pack extends into the space 5 and extends to the subframe beam 9 , the tail of the battery pack 12 may extend to a position close to the subframe beam 9 .

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above-mentioned embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, These simple modifications all belong to the protection scope of the present invention.

In addition, it should be noted that each specific technical feature described in the above-mentioned specific implementation manner may be combined in any suitable manner under the circumstance that there is no contradiction. In order to avoid unnecessary repetition, the present invention will not describe various possible combinations.

In addition, the various embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the spirit of the present invention, they should also be regarded as the contents disclosed in the present invention.

Claims (14)

1. A rear suspension assembly characterized by comprising a knuckle (1) and a front upper control arm (4) for extending in a vehicle width direction, wherein,

the front upper control arm (4) is connected with the steering knuckle (1);

the connection position of the front upper control arm (4) on the steering knuckle (1) is such that the rear suspension assembly comprises a battery pack insertion space (5) located below the front upper control arm (4).

2. A rear suspension assembly according to claim 1, wherein the connection position of the upper front control arm (4) on the knuckle (1) is such that the upper front control arm (4) is intended to be arranged at a position forward of and above the rear wheel center line in the vehicle height direction.

3. A rear suspension assembly according to claim 1, characterized in that the rear suspension assembly comprises a rear upper control arm (2), the front upper control arm (4) and the rear upper control arm (2) being intended to be arranged in the vehicle front-rear direction, and the rear upper control arm (2) being connected to the steering knuckle (1), wherein the front upper control arm (4) and the rear upper control arm (2) are intended to be connected to the same subframe cross member (9).

4. A rear suspension assembly according to claim 3, wherein the upper front control arm (4) is located at a height close to the height of the upper rear control arm (2), or wherein the height of the upper front control arm (4) and the height of the upper rear control arm (2) are the same.

5. A rear suspension assembly according to claim 3, wherein the rear upper control arm (2) is adapted to extend in the vehicle width direction, and the rear upper control arm (2) is attached to the knuckle (1) at a position such that the rear upper control arm (2) is adapted to be arranged behind and in the vehicle height direction near the rear wheel center line.

6. A rear suspension assembly according to claim 3, characterized in that it comprises a rear lower control arm (3), the upper rear control arm (2) and the lower rear control arm (3) being intended to be arranged in the vehicle height direction, and the lower rear control arm (3) being connected to the steering knuckle (1), wherein the upper front control arm (4), the lower rear control arm (3) and the upper rear control arm (2) are intended to be connected to one and the same subframe cross member (9).

7. A rear suspension assembly according to claim 6, wherein the length arm of the lower rear control arm (3) is adapted to extend in the vehicle width direction.

8. A rear suspension assembly according to claim 7, wherein the lower rear control arm (3) is adapted to be located in a region directly below the line connecting the centres of the rear wheels.

9. A rear suspension assembly according to claim 6, characterized in that it comprises a rear suspension spring unit (6), said rear suspension spring unit (6) being arranged on said rear lower control arm (3) and between said front upper control arm (4) and said rear upper control arm (2).

10. A rear suspension assembly according to claim 6, wherein the upper rear control arm (2) is arranged for adjusting the toe angle and the lower rear control arm (3) is arranged for adjusting the camber angle.

11. A rear suspension assembly according to any one of claims 1-10, wherein a bracket (7) extending rearward in the vehicle front-rear direction protrudes from the knuckle (1), and the rear suspension assembly includes a damper (8), the damper (8) being provided on the bracket (7) and located rearward of the upper rear control arm (2) and the lower rear control arm (3).

12. A rear suspension arrangement, characterized by a subframe beam (9) and a rear suspension assembly according to any one of claims 1-11, wherein the front upper control arm (4) is connected to the subframe beam (9).

13. A rear suspension structure according to claim 12, wherein the battery pack protruding space (5) extends to the sub-frame cross member (9).

14. A vehicle characterized by comprising a battery pack (12) and the rear suspension structure of claim 12 or 13, wherein the battery pack (12) protrudes into the battery pack protruding space (5).

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