CN219256979U - Rear suspension structure and automobile with same - Google Patents

Abstract

The embodiment of the application discloses a rear suspension structure and an automobile with the same, wherein the rear suspension structure comprises an upper plate spring, a first swing arm and a second swing arm; the outer end of the upper plate spring is used for being connected with the wheel bracket, and the inner end is used for being connected with the rear frame; the first swing arm and the second swing arm are both positioned below the upper plate spring, one of the first swing arm and the second swing arm is positioned at the front side of the upper plate spring, and the other is positioned at the rear side of the upper plate spring; the outer end of the first swing arm is used for being connected with the wheel bracket, and the inner end of the first swing arm is used for being connected with the rear frame; the outer end of the second swing arm is used for being connected with the wheel bracket, and the inner end of the second swing arm is used for being connected with the rear frame; the distance between the outer end of the first swing arm and the outer end of the second swing arm is smaller than the distance between the inner end of the first swing arm and the inner end of the second swing arm. The rear suspension structure adopts the composite plate spring as the upper swing arm, has the advantages of small number of parts, light weight and small occupied space, and combines smoothness and operation stability.

Description

Rear suspension structure and automobile with same

Technical Field

The application relates to the technical field of automotive suspensions, in particular to a rear suspension structure and an automobile with the same.

Background

The conventional structure of the independent rear suspension of an automobile is formed with macpherson, double wishbone, multiple links, and the like. The Macpherson suspension has small occupied space and small number of parts, but the camber angle change is large when the wheels jump, and the tires are easy to wear; the five-link suspension has the advantages that the performance of the five-link suspension is optimal, the camber angle change is small when the wheels jump, the tires are not easy to wear, but the problems of large number of parts, high cost and large occupied space exist; the advantages of the double-fork arm suspension are the same as those of the five-link suspension, and the number of parts of the double-fork arm suspension is small, but the problems of heavy parts, high cost and large occupied space exist.

Therefore, how to design a rear suspension structure, on the basis of ensuring performance, has the advantages of small number of parts, light weight and small occupied space, and is a technical problem which needs to be solved by the technicians in the field at present.

Disclosure of Invention

The purpose of this application is to provide a rear suspension structure and have its car, and this rear suspension structure adopts combined material leaf spring as the swing arm, has that part quantity is few, light in weight, occupation space is little advantage, and compromise ride comfort and stability of operation.

In order to solve the technical problems, an embodiment of the present application provides a rear suspension structure, including an upper leaf spring, a first swing arm and a second swing arm; the outer end of the upper plate spring is used for being connected with the wheel bracket, and the inner end of the upper plate spring is used for being connected with the rear frame;

the first swing arm and the second swing arm are both positioned below the upper plate spring, one of the first swing arm and the second swing arm is positioned at the front side of the upper plate spring, and the other is positioned at the rear side of the upper plate spring;

the outer end of the first swing arm is used for being connected with the wheel bracket, and the inner end of the first swing arm is used for being connected with the rear frame; the outer end of the second swing arm is used for being connected with the wheel bracket, and the inner end of the second swing arm is used for being connected with the rear frame;

the distance between the outer end of the first swing arm and the outer end of the second swing arm is smaller than the distance between the inner end of the first swing arm and the inner end of the second swing arm.

The rear suspension structure comprises the upper plate spring, wherein the upper plate spring comprises a plate spring body and an outer joint which are fixedly connected; the outer joint is used for being connected with the wheel bracket; the rear suspension structure further comprises a shock absorber, and the lower end of the shock absorber penetrates through the outer side joint to be connected with the wheel bracket.

The rear suspension structure as described above, the outboard joint includes a joint portion fixedly connected with the leaf spring body, and two fork portions connected with the wheel bracket, a space for the shock absorber to pass through being formed between the two fork portions.

In the rear suspension structure as described above, the bifurcated portion is provided with a first bush for connection with the wheel bracket.

In the rear suspension structure, the plate spring body is made of composite material.

In the rear suspension structure, the upper plate spring comprises an inner side joint, and the upper plate spring is fixedly connected with the rear frame through the inner side joint.

The rear suspension structure as described above, further comprising a stabilizer bar having an outer end for connection with the wheel bracket and an inner end for connection with the rear frame; the stabilizer bar is located at the rear side of the upper plate spring.

In the rear suspension structure, the outer end and the inner end of the first swing arm are respectively provided with the second bushings, and the two second bushings are respectively used for being connected with the wheel bracket and the rear frame;

and/or the number of the groups of groups,

and the outer end and the inner end of the second swing arm are respectively provided with a third bushing, and the two third bushings are respectively used for being connected with the wheel bracket and the rear frame.

According to the rear suspension structure, the first swing arm is arranged on the front side of the upper plate spring, the second swing arm is arranged on the rear side of the upper plate spring, and the inner end connecting point of the second swing arm is a toe-in adjusting point of an automobile.

The rear suspension structure as described above further includes a propeller shaft having an outer end for connection with the wheel bracket and an inner end for connection with a driving member mounted to the rear frame.

The embodiment of the application also provides an automobile, which comprises a wheel bracket and a rear frame, and further comprises any one of the rear suspension structures, wherein the rear suspension structures are connected between the wheel bracket and the rear frame.

Since the rear suspension structure described above has the above technical effects, the automobile including the rear suspension structure also has corresponding technical effects, and the discussion is not repeated here.

Drawings

FIG. 1 is a schematic diagram of a rear suspension structure according to an embodiment of the present disclosure in a top view;

FIG. 2 is a schematic view of the rear suspension structure of FIG. 1 from a rear perspective;

FIG. 3 is a schematic view of the rear suspension structure of FIG. 1 in elevation;

FIG. 4 is a schematic view of a rear suspension structure with the upper leaf spring hidden in an embodiment;

FIG. 5 is a schematic view of the upper leaf spring in a top view in an embodiment;

fig. 6 is a schematic view of the structure of the upper leaf spring in the embodiment in a bottom view.

Reference numerals illustrate:

the upper leaf spring 11, the leaf spring body 111, the outer joint 112, the joint portion 1121, the crotch portion 1122, the first bushing 1123, the inner joint 113, the first swing arm 12, the second bushing 121, the second swing arm 13, the third bushing 131, the damper 14, the stabilizer bar 15, the transmission shaft 16;

wheel support 21, bearing 211, rear frame 22.

Detailed Description

In order to provide a better understanding of the present application, those skilled in the art will now make further details of the present application with reference to the drawings and detailed description.

For easy understanding and brevity of description, the following description is given together with the rear suspension structure and the automobile having the same, and the description of the advantageous effects will not be repeated.

The rear suspension structure of the automobile is one of components for ensuring riding comfort, is a force transmission component connected between a frame and an axle (or wheels), and can transmit force and torque acting between the wheels and the frame so as to buffer the impact force transmitted to the frame or the automobile body by an uneven road surface, reduce vibration caused by the impact force and ensure the running stability of the automobile.

The terms of directions such as front, rear, upper, lower, outer, and inner are defined below with reference to the direction in which the vehicle is in a normal state, the direction of the front end is the front, the direction of the rear end is the rear, the direction away from the center of the vehicle in the vehicle width direction is the outer, the direction closer to the center of the vehicle is the inner, the direction closer to the wheels is the lower, and the direction closer to the roof is the upper. These orientation terms are used only for ease of understanding and description and should not be construed as limiting the scope of protection.

Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of a rear suspension structure according to an embodiment of the present disclosure in a top view; FIG. 2 is a schematic view of the rear suspension structure of FIG. 1 from a rear perspective; FIG. 3 is a schematic view of the rear suspension structure of FIG. 1 in elevation; fig. 4 is a schematic structural view of the rear suspension structure hidden upper leaf spring in the embodiment.

In this embodiment, the vehicle includes the wheel bracket 21 and the rear frame 22, and further includes a rear suspension structure connected between the rear frame 22 and the wheel bracket 21, wherein a portion of the rear frame 22 connected to the rear suspension structure is typically a sub-frame of the rear frame 22.

The rear suspension structure comprises an upper leaf spring 11, a first swing arm 12 and a second swing arm 13; the outer end of the upper plate spring 11 is used for being connected with a wheel bracket 21, and the inner end of the upper plate spring 11 is used for being connected with a rear frame 22; the first swing arm 12 and the second swing arm 13 are both positioned below the upper plate spring 11, the first swing arm 12 is positioned at the front side of the upper plate spring 11, and the second swing arm 13 is positioned at the rear side of the upper plate spring 11; the outer end of the first swing arm 12 is used for being connected with a wheel bracket 21, the inner end of the first swing arm 12 is used for being connected with a rear frame 22, the outer end of the second swing arm 13 is used for being connected with the wheel bracket 21, and the inner end of the second swing arm 13 is used for being connected with the rear frame 22.

Wherein, the distance between the outer end of the first swing arm 12 and the outer end of the second swing arm 13 is smaller than the distance between the inner end of the first swing arm 12 and the inner end of the second swing arm 13, in other words, the first swing arm 12 and the second swing arm 13 are arranged in an eight shape, and the inner ends of the first swing arm 12 and the second swing arm 13 are arranged to be opened relative to the outer end.

The rear suspension structure adopts the scheme, the upper plate spring 11 is arranged above the first swing arm 12 and the second swing arm 13, the structural characteristics of the plate spring are utilized, the coil spring and the upper swing arm of the traditional suspension can be replaced, the upper plate spring 11 can replace the coil spring to play a role in buffering, the upper swing arm can also replace the guiding role in guiding the movement track of the wheel, the arrangement of the first swing arm 12 and the second swing arm 13 is combined, the rear suspension structure can bear larger lateral impact, the camber angle change during wheel jump is small, the smoothness and the operation stability of an automobile can be considered, and meanwhile, the number of parts of the rear suspension structure is small, the weight is light, and the occupied space is small. In addition, the service life of the plate spring is longer.

In this embodiment, the upper leaf spring 11 includes a leaf spring body 111 and an outer joint 112, the leaf spring body 111 and the outer joint 112 are fixedly connected, and the outer joint 112 is used for connecting with the wheel bracket 21; the rear suspension structure further includes a shock absorber 14, and a lower end of the shock absorber 14 is connected to the wheel bracket 21 through an outboard joint 112. The arrangement is convenient for the installation of the shock absorber 14, the buffering and guiding functions of the upper plate spring 11 are not affected, the integration level of the rear suspension structure is higher, and the occupied space is relatively smaller. The upper end of the damper 14 is connected to the vehicle body.

Referring to fig. 5 and 6 together, fig. 5 and 6 show schematic structural views of the upper leaf spring in a top view and a bottom view, respectively, in an embodiment.

In the present embodiment, the outer joint 112 of the upper leaf spring 11 includes a joint portion 1121 and two branch portions 1122, the joint portion 1121 is fixedly connected to the leaf spring body 111, the branch portions 1122 are used for connection with the wheel bracket 21, so that the upper leaf spring 11 is connected with the wheel bracket 21 through the branch portions 1122 of the outer joint 112; the space for the shock absorber 14 to pass through is formed between the two branch portions 1122 of the upper plate spring 11, and as understood from fig. 1 to 3, the aforementioned structural design of the outboard joint 112 can satisfy the connection of the upper plate spring 11 with the wheel bracket 21 without affecting the connection of the shock absorber 14 with the wheel bracket 21, so that the integration degree of the rear suspension structure is better.

The outer joint 112 is an integral structure to improve structural strength; the joint portion 1121 may be detachably fastened to the leaf spring body 111 by a fastener such as a bolt, so as to facilitate replacement of the leaf spring body 111 or the outside joint 112 depending on the state of use.

The joint 1121 and the leaf spring body 111 may be connected by a fastener such as a bolt on the basis of insertion, so as to improve the fixing effect of the joint 1121 and the leaf spring body 111.

Each of the crotch portions 1122 of the outboard joint 112 is provided with a first bushing 1123, and the crotch portion 1122 is connected to the wheel bracket 21 through the first bushing 1123, it being understood that the outboard joint 112 has two connection points with the wheel bracket 21.

In this way, the impact between the crotch 1122 and the wheel bracket 21 can be relieved by the elasticity of the first bushing 1123 itself.

A coupling pin matching the first bushing 1123 may be provided on the wheel bracket 21 to achieve coupling.

Referring to fig. 2, 5 and 6, the joint portion 1121 has a slot on a side facing the plate spring body 111, and the outer end of the plate spring body 111 is inserted into the slot of the joint portion 1121, and the plate spring body 111 is fixedly connected to the joint portion 1121 by a fastener such as a bolt.

In particular, the upper leaf spring 11 has a set width dimension in the front-rear direction of the automobile, so that the upper leaf spring 11 has a good buffering effect, and can replace a conventional coil spring to reduce the number of parts of the rear suspension structure.

In this embodiment, the upper leaf spring 11 further includes an inner joint 113, and the upper leaf spring 11 is fixedly connected to the rear frame 22 through the inner joint 113.

In particular, the inner joint 113 and the rear frame 22 are also fixedly connected by fasteners such as bolts.

The inner joint 113 and the plate spring body 111 may be in a plug-in fit, and still referring to fig. 2, 5 and 6, the inner joint 113 has a slot facing the plate spring body 111, the inner joint 113 is inserted into the inner end of the plate spring body 111, and when assembled, fasteners such as bolts pass through the inner joint 113, the plate spring body 111 and the rear frame 22 to fix the three together. The provision of the inner joint 113 can protect the leaf spring body 111 and can also improve the reliability of the connection of the leaf spring body 111 to the rear frame 22.

In particular, the leaf spring body 111 may be made of a composite material, which is advantageous for reducing the overall weight of the rear suspension structure. The composite material of the plate spring body 111 may be glass fiber, carbon fiber, or the like.

In this embodiment, the rear suspension structure further includes a stabilizer bar 15, the stabilizer bar 15 is located at the rear side of the upper leaf spring 11, the outer end of the stabilizer bar 15 is used for being connected with the wheel bracket 21, the inner end of the stabilizer bar 15 is used for being connected with the rear frame 22, the stabilizer bar 15 itself may have a certain elasticity, and the arrangement thereof can prevent the excessive lateral roll of the automobile body during the turning, so as to keep the balance of the automobile body as much as possible.

Specifically, the stabilizer bar 15 is disposed above the second swing arm 13.

In the illustrated embodiment, the first swing arm 12 is disposed at the front side of the upper plate spring 11, the second swing arm 13 is disposed at the rear side of the upper plate spring 11, and in other embodiments, the second swing arm 13 may be disposed at the front side of the upper plate spring 11, and the first swing arm 12 is disposed at the rear side of the upper plate spring 11.

In this embodiment, the second swing arm 13 is located at the rear side of the upper leaf spring 11, and the second swing arm 13 also has the function of adjusting the front beam of the automobile, specifically, the connection point of the inner end of the second swing arm 13, that is, the connection position between the inner end of the second swing arm 13 and the rear frame 22 is the front beam adjusting point of the automobile, and at this time, the second swing arm 13 may be referred to as a front beam adjusting swing arm.

In this embodiment, the outer end and the inner end of the first swing arm 12 are respectively provided with a second bushing 121, and the two second bushings 121 are respectively used for being connected with the wheel bracket 21 and the rear frame 22, so that the impact between the first swing arm 12 and the wheel bracket 21 or the rear frame 22 can be relieved by using the elasticity of the second bushings 121.

The outer end and the inner end of the second swing arm 13 are respectively provided with a third bushing 131, the two third bushings 131 are respectively used for being connected with the wheel bracket 21 and the rear frame 22, and the buffer between the second swing arm 13 and the wheel bracket 21 or the rear frame 22 can be relieved by utilizing the elasticity of the third bushings 131.

The first bushing 1123, the second bushing 121, and the third bushing 131 in this embodiment may have the same structure, or may have different structures, and the specific structural form of the bushing may be an existing bushing form, which will not be described in detail herein.

In this embodiment, the rear suspension structure may further include a transmission shaft 16 to accommodate a rear driving form or a full driving form of the vehicle, an outer end of the transmission shaft 16 is used for connection with the wheel support 21, an inner end of the transmission shaft 16 is used for connection with a driving component mounted on the rear frame 22, and the driving component mounted on the rear frame 22 is typically a motor.

Specifically, the wheel support 21 is provided with a bearing 211, and the transmission shaft 16 is drivingly connected to a wheel (not shown) mounted on the wheel support 21 through the bearing.

The rear suspension structure and the automobile with the same are described in detail. Specific examples are set forth herein to illustrate the principles and embodiments of the present application, and the description of the examples above is only intended to assist in understanding the methods of the present application and their core ideas. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.

Claims (11)

1. The rear suspension structure is characterized by comprising an upper plate spring, a first swing arm and a second swing arm; the outer end of the upper plate spring is used for being connected with the wheel bracket, and the inner end of the upper plate spring is used for being connected with the rear frame;

the first swing arm and the second swing arm are both positioned below the upper plate spring, one of the first swing arm and the second swing arm is positioned at the front side of the upper plate spring, and the other is positioned at the rear side of the upper plate spring;

the outer end of the first swing arm is used for being connected with the wheel bracket, and the inner end of the first swing arm is used for being connected with the rear frame; the outer end of the second swing arm is used for being connected with the wheel bracket, and the inner end of the second swing arm is used for being connected with the rear frame;

the distance between the outer end of the first swing arm and the outer end of the second swing arm is smaller than the distance between the inner end of the first swing arm and the inner end of the second swing arm.

2. The rear suspension structure of claim 1, wherein the upper leaf spring comprises a leaf spring body and an outboard joint fixedly connected; the outer joint is used for being connected with the wheel bracket; the rear suspension structure further comprises a shock absorber, and the lower end of the shock absorber penetrates through the outer side joint to be connected with the wheel bracket.

3. The rear suspension structure according to claim 2, wherein the outboard joint includes a joint portion and two branch portions, the joint portion being fixedly connected with the leaf spring body, the branch portions being connected with the wheel bracket, a space being formed between the two branch portions for the shock absorber to pass through.

4. A rear suspension structure as claimed in claim 3, wherein the bifurcated portion is provided with a first bushing for connection with the wheel bracket.

5. The rear suspension structure as recited in any one of claims 2-4, wherein the leaf spring body is a leaf spring body made of a composite material.

6. The rear suspension structure as recited in any one of claims 1-4, wherein the upper leaf spring includes an inboard joint through which the upper leaf spring is fixedly coupled to the rear frame.

7. The rear suspension structure according to any one of claims 1 to 4, further comprising a stabilizer bar having an outer end for connection with the wheel bracket and an inner end for connection with the rear frame; the stabilizer bar is located at the rear side of the upper plate spring.

8. The rear suspension structure according to any one of claims 1 to 4, wherein the outer end and the inner end of the first swing arm are each provided with a second bushing, both of which are respectively used for connection with the wheel bracket and the rear frame;

and/or the number of the groups of groups,

and the outer end and the inner end of the second swing arm are respectively provided with a third bushing, and the two third bushings are respectively used for being connected with the wheel bracket and the rear frame.

9. The rear suspension structure according to any one of claims 1 to 4, wherein the first swing arm is provided on a front side of the upper leaf spring, the second swing arm is provided on a rear side of the upper leaf spring, and an inner end connection point of the second swing arm is a toe-in adjustment point of an automobile.

10. The rear suspension structure according to any one of claims 1 to 4, further comprising a propeller shaft having an outer end for connection with the wheel bracket and an inner end for connection with a drive member mounted on the rear frame.

11. An automobile comprising a wheel support and a rear frame, further comprising a rear suspension structure according to any one of claims 1-10, said rear suspension structure being connected between said wheel support and said rear frame.

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