CN211000825U

CN211000825U - Automobile rear suspension structure and automobile

Info

Publication number: CN211000825U
Application number: CN201921600327.7U
Authority: CN
Inventors: 张志龙; 王祥; 陈龙; 董钊辰; 罗照湘
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2020-07-14
Anticipated expiration: 2029-09-24

Abstract

The utility model provides a suspension structure and car behind car, wherein, suspension structure includes behind the car: an auxiliary frame; the left and right rear steering knuckles; the rear wheel steering machine is installed on a rear cross beam of the auxiliary frame, the rear wheel steering machine is further provided with a steering pull rod which is connected with the left rear steering knuckle and the right rear steering knuckle respectively, and the steering pull rod is located below a rear mounting point of the auxiliary frame and is driven by the rear wheel steering machine to move left and right so as to steer by pulling the left rear steering knuckle and the right rear steering knuckle. The utility model optimizes the arrangement structure of the rear five-bar suspension, can realize the rotation angle of the rear wheel of more than 10 degrees, reduces the turning radius of the automobile and improves the controllability; the steering pull rod is used for replacing the toe-in control arm, so that the cost is reduced, and the toe-in angle of the rear wheel can be conveniently adjusted by adjusting the length of the steering pull rod.

Description

Automobile rear suspension structure and automobile

Technical Field

The utility model relates to the technical field of automobiles, especially, relate to a suspension structure and car behind car.

Background

Active Rear wheel steering (ARS) of a passenger vehicle is a new trend of current development of a steering system, has been configured on certain high-top vehicle models abroad, but can only realize small-angle (less than 6 degrees) steering. At present, domestic manufacturers are in a transition stage from experimental verification to mass production carrying, and the rear wheel active steering technology puts forward higher requirements on the arrangement space of a suspension because an additional steering freedom degree is added on the traditional rear independent suspension:

1. the traditional rear suspension has no steering function, and parts such as a suspension swing arm, a shock absorber, a stabilizer bar and the like can interfere with tires and a shaft joint in the process of rear wheel rotation, and the peripheral arrangement space needs to be comprehensively considered during arrangement, so that the motion interference is avoided.

2. The rear wheel steering five-link suspension has a complex structure, needs more mounting points on a rear steering knuckle and an auxiliary frame, is difficult to arrange, and provides higher design requirements for the rear steering knuckle and the auxiliary frame.

At present, manufacturers at home temporarily have no mass production rear wheel steering five-link rear suspension structure, rear wheel steering five-link suspension steering pull rods of foreign manufacturers are all realized by toe-in control arms, the length cannot be adjusted, the toe-in angle of wheels is difficult to adjust, and the steering function of rear wheels with small angles (less than 5 degrees) can only be realized. And the suspension structure is mostly used for medium and large-sized cars and is not suitable for medium and large-sized SUVs.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a suspension structure and car behind car are provided to realize that the wide-angle rear wheel turns to and is convenient for adjust the toe-in angle before the rear wheel.

In order to solve the technical problem, the utility model provides a suspension structure behind car, include:

an auxiliary frame;

the left and right rear steering knuckles;

the rear wheel steering machine is installed on a rear cross beam of the auxiliary frame, the rear wheel steering machine is further provided with a steering pull rod which is connected with the left rear steering knuckle and the right rear steering knuckle respectively, and the steering pull rod is located below a rear mounting point of the auxiliary frame and is driven by the rear wheel steering machine to move left and right so as to steer by pulling the left rear steering knuckle and the right rear steering knuckle.

Wherein, the steering linkage with the rear cross beam of sub vehicle frame has 8 ~ 10mm clearance.

The steering linkage comprises a first connecting rod and a second connecting rod which are in threaded connection, the joint of the first connecting rod and the second connecting rod is locked through an adjusting nut, the adjusting nut is used for adjusting the length of the steering linkage, the other end of the first connecting rod is connected with the rear wheel steering gear, and the other end of the second connecting rod is connected with the rear steering knuckle.

Wherein, suspension structure still includes behind the car:

the rear steering knuckle is connected with a transverse swing arm, a longitudinal swing arm, a guide arm and a camber control arm between the auxiliary frame, the transverse swing arm and the camber control arm are connected with the rear steering knuckle through ball pins, and the longitudinal swing arm and the guide arm are connected with the rear steering knuckle through bushings.

Wherein, suspension structure still includes behind the car:

and the lower mounting point of the damping unit is arranged on the left rear steering knuckle and the right rear steering knuckle and is positioned behind the transverse swing arm.

Wherein, the distance between the lower mounting point of the vibration damping unit and the bearing hub mounting surface is at least 200 mm.

Wherein, suspension structure still includes behind the car:

and the transverse stabilizer bar is fixed below the left longitudinal beam and the right longitudinal beam of the auxiliary frame and is respectively connected with the left rear steering knuckle and the right rear steering knuckle through stabilizer bar connecting rods.

Wherein the stabilizer link is located between the camber control arm and the tie rod and is connected to the rear knuckle via a bushing.

The rear wheel steering gear is mounted on a rear cross beam of the auxiliary frame through a bolt.

The utility model also provides a car, have car rear suspension structure.

The embodiment of the utility model provides a beneficial effect lies in: the arrangement structure of the rear five-link suspension is optimized, the rotation angle of the rear wheel exceeding 10 degrees can be realized, the turning radius of the automobile is reduced, and the controllability is improved; the steering pull rod is used for replacing the toe-in control arm, so that the cost is reduced, and the toe-in angle of the rear wheel can be conveniently adjusted by adjusting the length of the steering pull rod.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is the utility model discloses a spatial structure schematic diagram of suspension structure behind car.

Fig. 2 is a schematic bottom view of a rear suspension structure of an automobile according to an embodiment of the present invention.

Fig. 3 is a schematic view of a partial structure of a rear suspension structure of an automobile according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the invention may be practiced. The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the invention.

Referring to fig. 1 to fig. 3, an embodiment of the present invention provides an automobile rear suspension structure, including:

an auxiliary frame 1;

two rear steering knuckles 2 on the left and right;

the rear wheel steering gear 3 is installed on the rear cross beam of the auxiliary frame 1, the rear wheel steering gear 3 is further provided with a steering pull rod 4 which is respectively connected with the left rear steering knuckle 2 and the right rear steering knuckle 2, the steering pull rod 4 is located below the rear mounting point of the auxiliary frame 1 and is driven by the rear wheel steering gear 3 to move left and right so as to steer by driving the left rear steering knuckle 2 and the right rear steering knuckle 2.

Specifically, the subframe 1 further includes a left side member 11, a right side member 12, a front cross member 13, and a rear cross member 14. The rear-wheel steering gear 3 is fixed to a rear cross member 14 of the subframe 1 by four bolts. The rear ends of the left and right longitudinal beams of the subframe 1 are respectively provided with a rear mounting point 15 for assembling the subframe 1 with the vehicle body. As can be seen from fig. 1, the steering tie rod 4 is located below the rear mounting point 15 of the subframe 1. In addition, the steering linkage 4 has a gap of 8-10 mm with the rear cross member 14 of the subframe 1.

Further, the steering linkage 4 comprises a first connecting rod 41 and a second connecting rod 42 which are connected in a threaded manner, the joint of the first connecting rod 41 and the second connecting rod 42 is locked by an adjusting nut 40, the adjusting nut 40 is used for adjusting the length of the steering linkage 4, the other end of the first connecting rod 41 is connected with the rear wheel steering machine 3, and the other end of the second connecting rod 42 is connected with the rear steering knuckle 2. The existing five-link rear suspension is a toe-in control arm with nonadjustable length at the position, and the toe-in angle of a rear wheel cannot be adjusted. In the embodiment, a rear-wheel steering machine 3 and a steering rod 4 (similar to a front-wheel steering structure) are adopted to replace a toe-in control arm, and the nested length of a first connecting rod 41 and a second connecting rod 42 which are in threaded connection is changed by rotating an adjusting nut 40 on the steering rod 4, so that the length adjustment of the steering rod 4 is realized, and the toe-in angle of the rear wheel is adjusted. After the steering controller controls the steering direction and the steering angle of the rear wheels by detecting the steering angle, the vehicle speed and the like of the front wheels and making corresponding decisions, a motor in the rear-wheel steering machine 3 can drive the steering pull rod 4 to realize left-right displacement, so that the left and right rear steering knuckles 2 are driven to realize the rear-wheel steering function of about 10 degrees.

The rear steering knuckle 2 is a cast aluminum part, and outer mounting points of a transverse swing arm 51, a longitudinal swing arm 52, a guide arm 53 and a camber control arm 54 are arranged on the rear steering knuckle, wherein the transverse swing arm 51 and the camber control arm 54 are connected with the outer mounting points thereof by ball pins with large rotation angles, and the rest mounting points are connected by bushings so as to adapt to the requirements of up-and-down jumping of a suspension and the rotation angles of different parts during steering. The lateral swing arm 51, the longitudinal swing arm 52, the guide arm 53, and the camber control arm 54 are connected between the rear knuckle 2 and the side member of the sub-frame 1.

The rear knuckle 2 is also provided with a lower mounting point for a damping unit 6 and is located behind the transverse swing arm 51. The damper unit 6 is an integrated structure formed by a damper and a spring. The distance between the lower mounting point of the damping unit 6 and the bearing hub mounting surface is at least 200mm (shown as d in fig. 1) so as to meet the requirement of the clearance between the damper and the tire at large rotation angles.

The rear suspension structure of the vehicle of the present embodiment further includes a stabilizer bar 7, and as can be seen from fig. 2, the stabilizer bar 7 is fixed below the left side member 11 and the right side member 12 of the sub-frame 1. The stabilizer bar 7 is connected to the left and right rear knuckles 2 via stabilizer links 71, respectively. The stabilizer link 71 is connected to the rear knuckle 2 through a bushing. As can be seen from fig. 3, the stabilizer link 71 is located between the camber control arm 54 and the steering link 4.

The automobile rear suspension structure of the embodiment can be used for four-wheel drive medium and large SUVs or saloon cars.

Corresponding to the embodiment of the utility model provides a rear suspension structure of automobile, the utility model provides a second provides a car, has the embodiment of the utility model provides a rear suspension structure of automobile.

As can be seen from the above description, the embodiment of the present invention has the following advantages: the arrangement structure of the rear five-link suspension is optimized, the rotation angle of the rear wheel exceeding 10 degrees can be realized, the turning radius of the automobile is reduced, and the controllability is improved; the steering pull rod is used for replacing the toe-in control arm, so that the cost is reduced, and the toe-in angle of the rear wheel can be conveniently adjusted by adjusting the length of the steering pull rod.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. An automobile rear suspension structure, comprising:

an auxiliary frame;

the left and right rear steering knuckles;

2. The rear suspension structure of claim 1, wherein the tie rod has a clearance of 8-10 mm from a rear cross member of the sub frame.

3. The rear suspension structure of claim 1, wherein the steering link includes a first link and a second link that are connected by a screw, a joint of the first link and the second link is locked by an adjusting nut for adjusting a length of the steering link, the other end of the first link is connected to the rear wheel steering gear, and the other end of the second link is connected to the rear knuckle.

4. The automobile rear suspension structure according to claim 1, characterized by further comprising:

5. The automobile rear suspension structure according to claim 4, characterized by further comprising:

6. The automobile rear suspension structure according to claim 5, wherein a distance from a lower mounting point of the damping unit to a bearing hub mounting surface is at least 200 mm.

7. The automobile rear suspension structure according to claim 4, characterized by further comprising:

8. The rear suspension structure of claim 7, wherein the stabilizer link is located between the camber control arm and the tie rod and is connected to the rear knuckle by a bushing.

9. The rear suspension structure of claim 1, wherein the rear wheel steering gear is mounted on a rear cross member of the sub frame by bolts.

10. An automobile having the automobile rear suspension structure as claimed in any one of claims 1 to 9.