CN201102453Y - Automotive rear suspension system - Google Patents

Abstract

A rear suspension system of a vehicle is provided, which has the advantage of compact structure and can improve the handing stability and the ride comfort of the vehicle. The rear suspension system includes a spiral spring and a shock absorber which are connected with the body of the vehicle and also includes a rear underframe which is connected with the body of the vehicle. The rear underframe is equipped with a central stent and two connecting stents which extend symmetrically from two ends of the central stent. The rear suspension system also includes two rear up-swing arms, two rear vertical-swing arms and two rear down-swing arms. The two rear up-swing arms, the two rear vertical-swing arms and the two rear down-swing arms are respectively arranged on two sides of the rear underframe symmetrically. Two ends of every rear up-swing arm are respectively equipped with the central stent and one end of every rear vertical-swing arm on one side of the rear underframe. The rear down-swing arms are arranged under the rear up-swing arms and two ends of every rear down-swing arm are connected with the central stent and one end of every rear vertical-swing arm. The other ends of the rear vertical-swing arms are connected with one connecting stent and one ends of the rear vertical-swing arms are connected with hub core shafts of wheels of the vehicle.

Description

car rear suspension system

technical field

The utility model relates to an automobile chassis, in particular to an automobile rear suspension system.

Background technique

The four-wheel alignment adjustment parameters of the suspension mainly include camber angle, toe angle, etc. These characteristic parameters have an important impact on the stable driving performance and cornering control characteristics of the vehicle. At present, the rear suspension of domestic automobiles is generally based on semi-independent suspension, which has a simple structure. It mainly uses the deformation of the rubber bush installed on the suspension to achieve a certain variable toe angle angle and follow-up steering function. However, the primary task of the rubber bush is to connect the suspension and isolate the vibration, so the stiffness should not be too low. This creates a limitation on variable toe-in and follow-up steering, only a small angle can be obtained.

In addition, the rear suspension of this traditional semi-independent suspension generally adopts a coaxial arrangement on the arrangement structure of the shock absorber and the coil spring, that is, the upper end of the coil spring is installed in the spring upper seat on the frame, and the lower seat Supported on the lower spring seat of the shock absorber shell, it is figuratively speaking that the coil spring "sleeves" on the shell of the cylindrical shock absorber, which makes this arrangement more troublesome in maintenance.

In addition, the layout of the suspension has a great impact on the space of the vehicle trunk and the layout of the fuel tank. Many cars have to reduce the layout space in order to meet the performance of the vehicle.

Utility model content

The purpose of the utility model is to provide a rear suspension system of an automobile which has a compact structure but can improve handling stability and ride comfort and is easy to maintain.

In order to achieve the above-mentioned purpose, the rear suspension system of the automobile of the present invention includes a coil spring and a shock absorber connected to the automobile body, and is characterized in that it also includes: a rear subframe connected with the automobile body, the rear The subframe has a central bracket and two connecting brackets protruding symmetrically from both ends of the central bracket; two rear upper swing arms, two rear longitudinal swing arms, and two rear lower swing arms; wherein, the two The rear upper swing arm, the rear longitudinal swing arm and the rear lower swing arm are respectively symmetrically installed on both sides of the rear sub-frame; on one side of the rear sub-frame, the two ends of the rear upper swing arm are respectively connected The central bracket of the rear sub-frame and one end of the rear longitudinal swing arm, the rear lower swing arm is located below the rear upper swing arm and its two ends are respectively connected to the central bracket of the rear sub-frame and the one end of the rear trailing arm, the other end of the rear trailing arm is connected to a connecting bracket of the rear sub-frame, the one end of the rear trailing arm has a The hub spindle of the wheel.

According to the above idea of the present invention, preferably, the rear upper swing arm is connected to the central bracket of the rear sub-frame through an eccentric bolt, so as to adjust the camber angle of the rear suspension system.

According to the above idea of the present invention, preferably, the rear upper swing arm further includes a reinforcing rib, an inner connecting ball joint, and a bushing.

According to the above idea of the present utility model, preferably, the rear upper swing arm is made of high-strength steel, the reinforcing rib is welded on the rear upper swing arm, and one end thereof is assembled to the rear upper swing arm through an internal connection ball joint. The other end is connected to the rear trailing arm through a bush.

According to the above idea of the present utility model, preferably, the rear longitudinal swing arm has a rear longitudinal swing arm bush, and both ends of the rear longitudinal swing arm bush are provided with oblique adjustment grooves, and the rear longitudinal swing arm bush The trailing arm is connected to the connecting bracket of the rear sub-frame through the oblique adjustment groove of the bushing of the rear trailing arm.

According to the above idea of the present utility model, preferably, the shock absorber is installed on the rear longitudinal swing arm and one end thereof is connected with the vehicle body, and the coil spring is installed between the vehicle body and the rear between the lower arms.

According to the above idea of the present utility model, preferably, a circular protrusion is formed on the rear lower swing arm, the coil spring has an upper vibration isolation pad and a lower vibration isolation pad, and the lower part of the lower vibration isolation pad forms a There is a groove, and the groove of the lower vibration isolation pad is connected with the circular protrusion of the rear lower swing arm.

According to the above idea of the present invention, preferably, four mounting points are formed on the rear sub-frame, and the rear sub-frame is connected with the vehicle body through the mounting points, and the two mounting points formed at the free end of the connecting bracket, and the other two mounting points are formed at the middle part of the arm of the connecting bracket.

As mentioned above, the rear suspension system of the automobile of the present utility model adopts a space multi-link mechanism composed of a rear upper swing arm, a rear sub-frame, a rear lower swing arm and a rear longitudinal swing arm, and fully utilizes the interior space of the vehicle body. , to facilitate maintenance of the rear suspension system. Through the configuration of this multi-link mechanism, it is convenient to adjust the camber angle, toe-in angle and obtain a certain steering angle of the rear wheel, which can realize the optimization of high camber rigidity and left and right flexible deflection, so as to maximize the use of tires. The grip can improve the stability of the vehicle's driving control, improve the response performance when changing the driving route, improve the up and down travel trajectory of the tires, and increase the ride comfort. In addition, the rear shock absorber and coil spring can be arranged independently and in parallel, which is beneficial to increase the compactness of the structure, so that the vehicle can have a lower and wider trunk floor, thereby maximizing the space of the trunk , and also provide a large layout space for the vehicle fuel tank.

It should be understood that both the above general description and the following detailed description of the present invention are exemplary and explanatory, and are intended to provide a clearer understanding of the present invention and provide further explanations.

Description of drawings

In order to further illustrate the above-mentioned purpose, structural features and effects of the present utility model, the utility model will be described in detail below in conjunction with the accompanying drawings. The role of the new principle, in the attached figure:

Fig. 1 is the three-dimensional structure schematic diagram of the rear suspension system of the automobile according to the present utility model;

Fig. 2 is the exploded schematic view of the rear suspension system of the automobile according to the utility model;

Fig. 3 is a three-dimensional structure diagram of the rear longitudinal swing arm in Fig. 2;

Figure 4a is a front view of the rear subframe in Figure 2;

Figure 4b is a front view of the rear subframe in Figure 4a.

Detailed ways

Reference will now be made in detail to the preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same numbers will be used throughout the drawings to refer to the same or like parts. In addition, although the terms used in this utility model are selected from known and commonly used terms, some terms mentioned in the specification of this utility model are selected by the applicant according to his judgment. described in the relevant section of the description. Furthermore, it is required that the present invention be understood not only by the actual terms used, but also by the meaning implied by each term.

As shown in Figure 1, it is the three-dimensional structure schematic diagram of the rear suspension system of the automobile of the present utility model, and Fig. 2 is the exploded schematic diagram of the rear suspension system of the automobile, for the sake of convenience, in addition to the rear subframe 26 and the rear Except that the stabilizer bar 17 is a single component, other components have corresponding components on the left side. Fig. 2 only shows the schematic diagram of the left half of the rear suspension system in Fig. 1, omitting the symmetrical part on the right side Structure.

As shown in Figures 1 and 2, the rear subframe has a central bracket 26a, connecting portions 26b and 26c formed symmetrically at both ends of the central bracket 26a, and two connecting brackets 26d and 26d symmetrically protruding from both ends of the central bracket 26a. 26e; four mounting points 23a-23d are provided on the rear subframe 26, which can be connected and supported by several bolts 25 with the vehicle body, wherein the mounting points 23a and 23d are respectively arranged at the free ends of the connecting brackets 26d and 26e, and the mounting points 23b 23c and 23c are respectively arranged in the middle part of the arms of connecting brackets 26d and 26e, so that the rear subframe 26 can control the body roll caused by lateral force, attenuate road noise, and provide installation positions for all suspension components.

One end of the rear upper swing arm 5 is connected to the rear subframe 26 through an eccentric bolt 13 and a washer 12, and a ball joint 11 is arranged at the end, and the eccentric bolt 13 passes through the ball joint 11, thereby being connected and assembled on the rear subframe 26 The connecting part 26b of the central bracket 26a is tightened with the nut 10 and the eccentric bolt 13, so that the rear upper swing arm 5 will not be separated from the rear sub-frame 26 and can rotate relative to the connecting part 26b, and the eccentric bolt 13 can be adjusted by rotation The placement position of the head can easily adjust the camber angle of the suspension; in addition, the rear upper swing arm 5 is connected to one end of the rear longitudinal swing arm 8 through the bolt 4 and the washer 3, that is, the other end of the rear upper swing arm 5 A bushing 2 is provided, and a bolt 4 passes through the bushing 2 and is tightened with a nut 1 . In this embodiment, preferably, the rear upper swing arm 5 is made of high-strength steel, and the reinforcing rib 5a welded on the upper side can greatly improve the strength of the part.

Similarly, one end of the rear lower swing arm 33 is provided with a bushing 27, and the bolt 28 passes through the bush 27 so that the said one end of the rear lower swing arm 33 is connected with one end of the central vehicle frame 26a of the rear subframe 26, and the rear lower swing arm 33 The other end is provided with a ball joint 35, and the bolt 34 passes through the ball joint 35 and is tightened with a nut 36, so that the rear lower swing arm 33 is connected with the one end of the rear longitudinal swing arm 8. It should be noted that the rear lower swing arm 33 is connected to the rear auxiliary vehicle. Both the frame 26 and the rear longitudinal swing arm 8 will not be separated and can rotate relatively. In this embodiment, preferably, the rear lower swing arm 33 is formed by stamping high-strength steel.

Referring to Fig. 3 and Fig. 4a and Fig. 4b at the same time, the other end of the rear longitudinal swing arm 8 is provided with a rear swing arm bush 7, and a pair of oblique adjustment grooves 9a are formed at both ends of the rear swing arm bush 7, and the rear auxiliary vehicle The free end of the connecting bracket 26d of the frame 26 passes through the oblique adjustment slots 9a on the rear swing arm bushing 7 through a pair of bolts 9'a to connect to the other end of the rear longitudinal swing arm 8, and tighten the connection with a nut 9, The toe angle of the rear suspension system can be conveniently set by using the oblique adjustment slot 9a of the rear trailing arm bush 9 .

As shown in Figure 1 or Figure 2, the rear suspension system of the present embodiment is connected to the wheels of the automobile through the hub mandrel 37 of the rear longitudinal swing arm 8; preferably, the rear longitudinal swing arm 8 is stamped from a high-strength steel plate The welded assembly of the front and rear panels and the middle reinforcement plate can control the toe-in of the vehicle, prevent the vehicle from braking, make the vehicle have a lower rollover center, and provide a suitable wheel camber.

The rear stabilizer bar 17 is connected to the rear trailing arm 8 through the rear stabilizer bar link 15, and is connected to the lower rear part of the rear subframe 26 with two rear stabilizer bar clips 18 and the rear stabilizer bar bushing 19, and is used Screw 20 is fixed.

It can be seen from the above structural description that the rear upper swing arm 5, the central bracket 26a of the rear subframe 26, the connecting bracket 26d of the rear subframe 26, the rear lower swing arm 33 and the rear longitudinal swing arm 8 constitute a spatial multi-link mechanism. .

Due to the space multi-link mechanism provided by the utility model, the rear shock absorber 6 and the coil spring 31 can be separated and set independently.

1 and 2, the rear shock absorber 6 is connected to the rear longitudinal swing arm 8 by bolts 29, and the upper part is connected to the vehicle body (not shown) by bolts. Preferably, the rear shock absorber 6 is double-tube type structure, can be inflated and fueled, has a rebound damping effect.

The coil spring 31 is connected to the vehicle body (not shown) through the upper vibration-isolating pad 30, and is connected to the rear lower swing arm 33 through the lower vibration-isolating pad 32. A groove (not shown) is formed at the bottom of the lower vibration-isolating pad 32, and the groove It is connected and fixed together with the circular protrusion 33a formed on the rear lower swing arm 33. The coil spring 31 is made of chrome steel. The upper and lower vibration isolation pads 30, 32 can be made of vibration damping materials such as rubber, which can reduce the transmission from the suspension to the Body noise.

It should be noted that the structures, shapes and functions of the bushings 27 and 2 and the inner connecting ball joints 11 and 35 should be understood by those skilled in the art from the prior art according to the above teachings. obtained, and will not be repeated here.

As mentioned above, the rear suspension system of the automobile of the present utility model is formed with a large space composed of the rear upper swing arm, the central bracket of the rear subframe, the connecting bracket of the rear subframe, the rear lower swing arm and the rear longitudinal swing arm. Link mechanism, by arranging the positions and connection methods of each link in this way, the rear shock absorber and coil spring can be arranged independently and in parallel, which is convenient for the maintenance of the rear suspension system; and, through the multi-link mechanism Configuration, easy to adjust and set the suspension characteristic parameters such as camber angle and toe angle of the rear suspension system, thus greatly improving the stability of the driving control of the vehicle, and at the same time improving the response performance when changing the driving route and improving the tire The up and down travel trajectory increases the ride comfort; in addition, the design of the rear suspension system greatly optimizes the spatial layout of the suspension, which is beneficial to increase the compact structure, so that the vehicle can have lower and wider luggage The trunk floor provides a larger design space for the trunk and fuel tank.

Although the utility model has been described with reference to the current specific embodiments, those of ordinary skill in the art should recognize that the essence of the utility model lies in the spatial arrangement of the multi-links in the suspension system. The above embodiments It is only used to illustrate the essential content, and various equivalent changes or substitutions can also be made without departing from the spirit of the present utility model. For example, those skilled in the art can also use the In the rear suspension system, the rear shock absorber 6 and the coil spring 31 are coaxially arranged, and the coil spring 31 can also be arranged on the rear upper swing arm 5. Such changes or replacements cannot be exhausted, as long as they do not depart from the present invention. Changes and modifications to the above-mentioned embodiments due to the new essential content will fall within the scope of protection as claimed in the claims of the present application.

Claims (9)

1. A rear suspension system of an automobile, comprising a coil spring and a shock absorber connected to a body of the automobile, characterized by further comprising: the rear auxiliary frame is connected with the body of the automobile and is provided with a central support and two connecting supports symmetrically extending out of two ends of the central support; two rear upper swing arms, two rear longitudinal swing arms, and two rear lower swing arms; wherein,

the two rear upper swing arms, the rear longitudinal swing arm and the rear lower swing arm are respectively and symmetrically arranged on two sides of the rear auxiliary frame;

the utility model discloses a rear auxiliary frame, including back sub vehicle frame, back lower swing arm, back upper swing arm, back lower swing arm, back.

2. The rear suspension system of an automobile according to claim 1, characterized in that: the rear upper swing arm is connected with the central support of the rear sub-frame through an eccentric bolt so as to adjust the camber angle of the rear suspension system.

3. The rear suspension system of an automobile according to claim 1, characterized in that: the rear upper swing arm also comprises a reinforcing rib, an inner connecting ball joint and a bushing.

4. The rear suspension system of a vehicle according to claim 3, wherein: the reinforcing rib is welded on the rear upper swing arm, one end of the reinforcing rib is assembled on the rear auxiliary frame through an inner connecting ball joint, and the other end of the reinforcing rib is connected on the rear longitudinal swing arm through a bushing.

5. The rear suspension system of an automobile according to claim 1, characterized in that: the back is indulged the swing arm and is had a back and indulge the swing arm bush, the both ends of back and indulge the swing arm bush are provided with the slant adjustment tank, just the back is indulged the swing arm and is passed through the back is indulged the swing arm bush the slant adjustment tank with the linking bridge of back sub vehicle frame is connected.

6. The rear suspension system of an automobile according to claim 1, characterized in that: and the rear longitudinal swing arm is a front panel, a rear panel and a middle reinforcing plate welding assembly which are formed by stamping high-strength steel plates.

7. The rear suspension system of an automobile according to claim 1, characterized in that: the shock absorber is installed on the rear longitudinal swing arm, one end of the shock absorber is connected with the vehicle body, and the spiral spring is installed between the vehicle body and the rear lower swing arm.

8. The rear suspension system of an automobile according to claim 7, characterized in that: the rear lower swing arm is provided with a circular protrusion, the spiral spring is provided with an upper vibration isolation pad and a lower vibration isolation pad, the lower part of the lower vibration isolation pad is provided with a groove, and the groove of the lower vibration isolation pad is connected with the circular protrusion of the rear lower swing arm.

9. The rear suspension system of an automobile according to claim 1, characterized in that: four mounting points are formed on the rear auxiliary frame, the rear auxiliary frame is connected with the body of the automobile through the mounting points, two mounting points are formed at the free end of the connecting support, and the other two mounting points are formed in the middle part of the arm part of the connecting support.

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