CN211000825U - Automobile rear suspension structure and automobile - Google Patents

Abstract

The utility model provides an automobile rear suspension structure and an automobile, wherein the automobile rear suspension structure comprises: a subframe; two left and right rear steering knuckles; , the rear wheel steering gear is also provided with a steering pull rod, which is respectively connected with the left and right rear steering knuckles. The steering pull rod is located below the rear mounting point of the subframe, and is driven by the rear wheel steering gear Displacement to pull the left and right rear steering knuckles to implement steering. The utility model optimizes the arrangement structure of the rear five-link suspension, which can realize the rotation angle of the rear wheel exceeding 10°, reduce the turning radius of the car, and improve the maneuverability; the steering rod is used to replace the toe-in control arm, which reduces the cost and reduces the cost. The rear toe angle can be easily adjusted by adjusting the length on the steering rod.

Description

An automobile rear suspension structure and automobile

technical field

The utility model relates to the technical field of automobiles, in particular to an automobile rear suspension structure and an automobile.

Background technique

Active Rear Steer (ARS) for passenger cars is a new trend in the development of steering systems. It has been configured on some high-end top models abroad, but it can only achieve small-angle (<6°) steering. Domestic manufacturers are currently in the transition stage from experimental verification to production. The rear wheel active steering technology adds additional steering freedom to the traditional rear independent suspension, so it puts forward higher requirements for the layout space of the suspension. :

1. The traditional rear suspension has no steering function. The suspension swing arm, shock absorber, stabilizer bar and other components may interfere with the tire and axle during the rotation of the rear wheel. The surrounding layout space needs to be comprehensively considered during layout to avoid movement. put one's oar in.

2. The structure of the rear wheel steering five-link suspension is complex, and it is necessary to add more installation points on the rear steering knuckle and subframe, which is difficult to arrange, and puts forward higher design requirements for the rear steering knuckle and the subframe .

At present, domestic manufacturers do not have mass-produced five-link rear suspension structures with rear wheel steering. The steering rods of foreign manufacturers' rear wheel steering five-link suspensions are all realized by toe control arms. The length cannot be adjusted, and the wheels are toe-in. The angle adjustment is difficult, and only a small angle (<5°) rear wheel steering function can be realized. And its suspension structure is mostly used for medium and large sedans, not suitable for medium and large SUVs.

Utility model content

The technical problem to be solved by the utility model is to provide an automobile rear suspension structure and an automobile, so as to realize large-angle rear wheel steering and facilitate adjustment of the rear wheel toe angle.

In order to solve the above-mentioned technical problems, the utility model provides an automobile rear suspension structure, including:

Subframe;

Two left and right rear steering knuckles;

The rear wheel steering machine is installed on the rear beam of the subframe, and the rear wheel steering machine is also provided with a steering pull rod, which is respectively connected with the left and right rear steering knuckles, and the steering pull rod is located on the side of the subframe. Below the rear installation point, and is driven by the rear wheel steering gear to move left and right, so as to pull the left and right rear steering knuckles to implement steering.

Wherein, the steering rod and the rear beam of the subframe have a gap of 8-10 mm.

Wherein, the steering rod includes a first connecting rod and a second connecting rod that are threadedly connected, and the joint of the first connecting rod and the second connecting rod is locked by an adjusting nut, and the adjusting nut is used to adjust the The length of the steering rod, 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, the automobile rear suspension structure also includes:

The yaw arm, the trailing arm, the guide arm and the camber control arm connected between the rear steering knuckle and the subframe, the yaw arm and the camber control arm are all connected to the other through ball pins. The rear steering knuckle is connected, and both the trailing arm and the guide arm are connected with the rear steering knuckle through a bushing.

Wherein, the automobile rear suspension structure also includes:

The lower installation point of the vibration damping unit is arranged on the left and right rear steering knuckles, and is located behind the swing arm.

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

Wherein, the automobile rear suspension structure also includes:

The lateral stabilizer bar is fixed under the left and right longitudinal beams of the sub-frame, and the lateral stabilizer bar is respectively connected with the left and right rear steering knuckles through the stabilizer bar connecting rod.

Wherein, the stabilizer bar link is located between the camber control arm and the steering rod, and is connected to the rear steering knuckle through a bushing.

Wherein, the rear wheel steering gear is mounted on the rear beam of the subframe through bolts.

The utility model also provides an automobile, which has the automobile rear suspension structure.

The beneficial effects of the embodiments of the present utility model are: the arrangement structure of the rear five-link suspension is optimized, the rear wheel rotation angle of more than 10° can be realized, the turning radius of the car is reduced, and the controllability is improved; the steering rod is used to replace the toe-in Control arm, reducing cost, and the rear toe angle can be easily adjusted by adjusting the length on the steering rod.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic three-dimensional structure diagram of an automobile rear suspension structure according to an embodiment of the present invention.

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

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

Detailed ways

The following descriptions of the embodiments are made with reference to the accompanying drawings to illustrate specific embodiments in which the present invention may be practiced. The direction and position terms mentioned in this utility model, such as "up", "down", "front", "rear", "left", "right", "inside", "outside", "top", " "Bottom", "Side", etc. refer only to the orientation or position of the drawings. Therefore, the direction and position terms are used to describe and understand the present invention, rather than limit the protection scope of the present invention.

Please refer to FIG. 1 to FIG. 3 at the same time, the first embodiment of the present invention provides a rear suspension structure of an automobile, including:

Subframe 1;

Two left and right rear steering knuckles 2;

The rear wheel steering gear 3 is installed on the rear beam of the subframe 1, and the rear wheel steering gear 3 is also provided with a steering pull rod 4, which is respectively connected with the left and right rear steering knuckles 2, and the steering pull rod 4 is located at the Below the rear mounting point of the sub-frame 1, it is driven by the rear wheel steering gear 3 to move left and right, so as to pull the left and right rear steering knuckles 2 to implement steering.

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 on the rear beam 14 of the subframe 1 by four bolts. The rear ends of the left and right longitudinal beams of the subframe 1 respectively have a rear mounting point 15 for assembling the subframe 1 and the vehicle body. As can be seen from FIG. 1 , the tie rod 4 is located below the rear mounting point 15 of the subframe 1 . In addition, the tie rod 4 and the rear cross member 14 of the subframe 1 have a gap of 8 to 10 mm.

Further, the steering rod 4 includes a first connecting rod 41 and a second connecting rod 42 that are threadedly connected, and the joint of the first connecting rod 41 and the second connecting rod 42 is locked by an adjusting nut 40, and the adjusting nut 40 is used for adjusting Regarding the length of the steering rod 4 , the other end of the first link 41 is connected to the rear wheel steering gear 3 , and the other end of the second link 42 is connected to the rear steering knuckle 2 . The existing five-link rear suspension is a toe control arm whose length is not adjustable, and the toe angle of the rear wheel cannot be adjusted. In this embodiment, the rear wheel steering gear 3 and the steering rod 4 (similar to the front wheel steering structure) are used to replace the toe control arm. The nesting length of the second link 42 realizes the adjustment of the length of the steering rod 4 so as to adjust the toe angle of the rear wheel. After the steering controller controls the steering direction and steering angle of the rear wheels by detecting the steering angle and vehicle speed of the front wheels and making corresponding decisions, the motor in the rear wheel steering gear 3 can drive the steering rod 4 to achieve left and right displacement , thereby driving the left and right rear steering knuckles 2 to achieve a rear wheel steering function of about 10°.

The rear steering knuckle 2 is a cast aluminum part, and is provided with the outer mounting points of the sway arm 51, the longitudinal arm 52, the guide arm 53 and the camber control arm 54, wherein the yaw arm 51 and the camber control arm 54 use large turning angles The ball pin is connected to its external mounting point, and the other mounting points are connected by bushings to adapt to the angle requirements for different parts of the suspension when the suspension bounces up and down and turns. The yaw arm 51 , the trailing arm 52 , the guide arm 53 and the camber control arm 54 are all connected between the rear knuckle 2 and the longitudinal beam of the subframe 1 .

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

The vehicle rear suspension structure of this embodiment further includes a lateral stabilizer bar 7 , which can be seen from FIG. 2 , the lateral stabilizer bar 7 is fixed under the left longitudinal beam 11 and the right longitudinal beam 12 of the subframe 1 . The lateral stabilizer bar 7 is connected to the left and right rear steering knuckles 2 respectively through stabilizer bar links 71 . The stabilizer bar link 71 is connected to the rear knuckle 2 through a bushing. As can be seen from FIG. 3 , the stabilizer bar link 71 is located between the camber control arm 54 and the steering link 4 .

The vehicle rear suspension structure of this embodiment can be used in a four-wheel drive medium and large SUV or a sedan.

Corresponding to the vehicle rear suspension structure of the first embodiment of the present utility model, the second embodiment of the present utility model provides an automobile having the automobile rear suspension structure described in the first embodiment of the present utility model.

It can be seen from the above description that the beneficial effects of the embodiments of the present invention are: the arrangement structure of the rear five-link suspension is optimized, the rear wheel rotation angle of more than 10° can be realized, the turning radius of the car is reduced, and the maneuverability is improved; The steering rod replaces the toe control arm, which reduces the cost, and the rear wheel toe angle can be easily adjusted by adjusting the length of the steering rod.

The above disclosures are only the preferred embodiments of the present invention, and of course, the scope of the rights of the present invention cannot be limited by this. Therefore, the equivalent changes made according to the claims of the present invention still belong to the scope covered by the present invention.

Claims (10)

1. an automobile rear suspension structure, is characterized in that, comprises: Subframe; Two left and right rear steering knuckles; The rear wheel steering machine is installed on the rear beam of the subframe, and the rear wheel steering machine is also provided with a steering pull rod, which is respectively connected with the left and right rear steering knuckles, and the steering pull rod is located on the side of the subframe. Below the rear installation point, and is driven by the rear wheel steering gear to move left and right, so as to pull the left and right rear steering knuckles to implement steering. 2 . The automobile rear suspension structure according to claim 1 , wherein the steering tie rod and the rear beam of the subframe have a clearance of 8-10 mm. 3 . 3 . The automobile rear suspension structure according to claim 1 , wherein the steering rod comprises a first connecting rod and a second connecting rod that are threadedly connected, and the phase between the first connecting rod and the second connecting rod is threaded. 4 . The joint is locked by an adjusting nut, the adjusting nut is used to adjust the length of the steering rod, the other end of the first connecting rod is connected to the rear wheel steering gear, and the other end of the second connecting rod is connected to the steering gear. The rear steering knuckles are connected. 4. automobile rear suspension structure according to claim 1, is characterized in that, also comprises: The yaw arm, the trailing arm, the guide arm and the camber control arm connected between the rear steering knuckle and the subframe, the yaw arm and the camber control arm are all connected to the other through ball pins. The rear steering knuckle is connected, and both the trailing arm and the guide arm are connected with the rear steering knuckle through a bushing. 5. automobile rear suspension structure according to claim 4, is characterized in that, also comprises: The lower installation point of the vibration damping unit is arranged on the left and right rear steering knuckles, and is located behind the swing arm. 6 . The automobile rear suspension structure according to claim 5 , wherein the distance between the lower mounting point of the vibration damping unit and the mounting surface of the bearing hub is at least 200 mm. 7 . 7. The automobile rear suspension structure according to claim 4, characterized in that, further comprising: The lateral stabilizer bar is fixed under the left and right longitudinal beams of the sub-frame, and the lateral stabilizer bar is respectively connected with the left and right rear steering knuckles through the stabilizer bar connecting rod. 8 . The automobile rear suspension structure according to claim 7 , wherein the stabilizer bar link is located between the camber control arm and the steering rod, and is connected to the rear steering knuckle through a bushing. 9 . connect. 9 . The automobile rear suspension structure according to claim 1 , wherein the rear wheel steering gear is mounted on the rear cross member of the subframe through bolts. 10 . 10. An automobile having the automobile rear suspension structure according to any one of claims 1-9.

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