Rear suspension structure and automobile

Abstract

The utility model relates to the technical field of suspensions, in particular to a rear suspension structure and an automobile. A rear suspension structure is used for transmitting force between an automobile body and wheels and comprises a left steering knuckle connected with a left wheel of an automobile; the right steering knuckle and the left steering knuckle are symmetrically arranged, and the right steering knuckle is connected with a right wheel of the automobile; the left shock absorber is connected with the left steering knuckle; the right shock absorber and the left shock absorber are symmetrically arranged, and the right shock absorber is connected with the right steering knuckle; the plate spring is of a single-piece structure; the plate spring is arranged between the left shock absorber and the right shock absorber, and the two ends of the plate spring are connected with the left shock absorber and the right shock absorber respectively. The rear suspension structure and the automobile are light in weight and small in occupied space.

Description

Technical Field

[0001] The present application relates to the technical field of suspensions, and particularly to a rear suspension structure and an automobile. Background Art

[0002] Traditional MacPherson independent suspensions are widely used in mini-cars, A-class passenger cars, commercial vehicles, logistics vehicles, etc. The MacPherson independent suspension includes structures such as a coil spring, a shock absorber, a steering knuckle, a lower control arm, a subframe, and a stabilizer bar. The overall number of components is large, and the space occupied and the weight are both large. The independent suspension realizes load bearing through the coil spring and the subframe. However, if the vehicle model is heavy, the stiffness of the coil spring has to be very large to match the higher weight, and it cannot be applied to logistics freight vehicle models with relatively large axle loads, and the coil spring is too heavy. Secondly, the independent suspension improves lateral support and anti-roll through the stabilizer bar, and the stabilizer bar occupies a large longitudinal space, which is not conducive to the layout of the battery pack. Utility Model Content

[0003] Based on this, it is necessary to provide a rear suspension structure and an automobile with light weight and small space occupation.

[0004] A rear suspension structure for transmitting force between an automobile body and a wheel, comprising:

[0005] A left steering knuckle for connecting with the left wheel of the automobile;

[0006] A right steering knuckle, symmetrically arranged with the left steering knuckle, and for connecting with the right wheel of the automobile;

[0007] A left shock absorber connected to the left steering knuckle;

[0008] A right shock absorber, symmetrically arranged with the left shock absorber, and connected to the right steering knuckle;

[0009] A leaf spring, arranged in a single-piece structure; the leaf spring is arranged between the left shock absorber and the right shock absorber, and both ends of the leaf spring are respectively connected to the left shock absorber and the right shock absorber.

[0010] In one embodiment, the leaf spring is a fiberglass structure / carbon fiber composite structure.

[0011] In one embodiment, the leaf spring is in an arch shape.

[0012] In one embodiment, along the height direction of the shock absorber, the middle part of the leaf spring arches upward to form an arch shape.

[0013] In one embodiment, the upper part of the left shock absorber is connected to the vehicle body, and a first connecting member is provided at the lower part; a first steering connection portion and a first leaf spring connection portion are provided on the first connecting member, the first steering connection portion is used for connecting with the left steering knuckle, and the first leaf spring connection portion is used for connecting with the leaf spring.

[0014] In one embodiment, the first steering connection portion and the first leaf spring connection portion are arranged in opposite directions.

[0015] In one embodiment, the upper part of the right shock absorber is connected to the vehicle body, and a second connecting member is provided at the lower part; a second steering connection portion and a second leaf spring connection portion are provided on the second connecting member, the second steering connection portion is used for connecting with the right steering knuckle, and the second leaf spring connection portion is used for connecting with the leaf spring.

[0016] In one embodiment, the second steering connection portion and the second leaf spring connection portion are arranged in opposite directions.

[0017] In one embodiment, first mounting portions and second mounting portions are respectively provided at both ends of the leaf spring, the first mounting portion is inserted and fixedly connected with the first leaf spring connection portion, and the second mounting portion is inserted and fixedly connected with the second leaf spring connection portion.

[0018] In one embodiment, a first connecting arm is provided on the left steering knuckle, and the first connecting arm is fixedly connected with the first steering connection portion; a second connecting arm is provided on the right steering knuckle, and the second connecting arm is fixedly connected with the second steering connection portion.

[0019] The present application also provides a vehicle, and the vehicle adopts the rear suspension structure described in any one of the above embodiments.

[0020] Compared with the prior art, the rear suspension structure only includes a steering knuckle, a shock absorber, and a leaf spring, replacing a spring, a stabilizer bar, a lower control arm, and a subframe, reducing the number of components and achieving overall lightweight; and the leaf spring can match a large weight and can adapt to various forming and usage requirements; the overall space occupied by the suspension is reduced, facilitating the arrangement of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of the rear suspension structure provided by the present application.

[0023] Figure 2 This is the front view schematic diagram of the rear suspension structure provided by this application.

[0024] Figure 3 is Figure 2 a partial schematic Figure 1 .

[0025] Figure 4 is Figure 2 a partial schematic Figure 2 .

[0026] Figure 5 This is the structural schematic diagram of the leaf spring provided by this application.

[0027] Reference numerals: 10, left steering knuckle; 11, first connecting arm; 20, right steering knuckle; 21, second connecting arm; 30, left shock absorber; 40, right shock absorber; 50, leaf spring; 51, first mounting portion; 52, second mounting portion; 60, first connecting member; 61, first steering connection portion; 62, first leaf spring connection portion; 70, second connecting member; 71, second steering connection portion; 72, second leaf spring connection portion. Detailed implementation manners

[0028] To make the above objects, features, and advantages of this application more obvious and understandable, the following will describe the detailed implementation manners of this application in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of this application. Therefore, this application is not limited by the specific embodiments disclosed below.

[0029] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the specification of this application are only for the purpose of illustration and do not represent the only implementation manner.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0032] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0033] Please refer to Figures 1 to 5 , this application provides a rear suspension structure for transmitting force between an automobile body and a wheel, including a left steering knuckle 10, a right steering knuckle 20, a left shock absorber 30, a right shock absorber 40, and a leaf spring 50. Specifically, the left steering knuckle 10 is connected to the left wheel of the automobile, the right steering knuckle 20 is symmetrically arranged with the left steering knuckle 10 and is connected to the right wheel of the automobile. The left shock absorber 30 is connected to the left steering knuckle 10, the right shock absorber 40 is symmetrically arranged with the left shock absorber 30 and is connected to the right steering knuckle 20. The leaf spring 50 is arranged in a single-piece structure, and the leaf spring 50 is disposed between the left shock absorber 30 and the right shock absorber 40. Further, both ends of the leaf spring 50 are respectively connected to the left shock absorber 30 and the right shock absorber 40. Here, the single-piece structure means that the leaf spring 50 is in a single-piece plate shape and is not arranged in multiple layers. However, the single-piece leaf spring 50 has a relatively large thickness and can replace the multi-layer leaf spring 50.

[0034] The leaf spring 50 connects the left steering knuckle 10 and the right steering knuckle 20, and replaces the coil spring and the stabilizer bar of the traditional suspension with a single-piece leaf spring 50. And the leaf spring 50 provides a certain roll angle stiffness during vehicle body roll, thus taking into account the functions of shock absorption and support of the ordinary coil spring and the anti-roll function of the stabilizer bar. The leaf spring 50 directly connects the steering knuckle and the vehicle body, replacing the lower control arm and the subframe of the traditional suspension, and taking into account the functions of the lower control arm movement and the subframe connecting the vehicle body. It greatly reduces the number of components, realizes the lightweight of the suspension, reduces the unsprung mass, and improves the dynamic performance. It saves more space, is convenient for the installation of the battery pack, and has good durability, NVH performance and handling stability performance. The middle part of the leaf spring 50 is not connected to any component, reducing the force and wear on the leaf spring 50 and increasing its service life.

[0035] Furthermore, the leaf spring 50 is a glass fiber structure / carbon fiber composite structure. The glass fiber structure here means that the leaf spring 50 is a plate-like structure made of glass fiber. The carbon fiber composite structure here means that the leaf spring 50 is a plate-like structure made of carbon fiber composite material. The leaf spring 50 has a small weight and a large stiffness, achieving lightweight.

[0036] Furthermore, the leaf spring 50 is in an arch shape. The arch shape setting enables the leaf spring 50 to have stronger load-bearing and anti-roll effects, improving the overall performance of the suspension assembly. Preferably, along the height direction of the shock absorber, the middle part of the leaf spring 50 arches upward to form the above-mentioned arch shape. Of course, in other embodiments, it may also be that other positions of the leaf spring 50 arch, or the arching is not from bottom to top, or there is not just one arch, which can be specifically selected according to actual needs.

[0037] Specifically, the upper part of the left shock absorber 30 is connected to the vehicle body to attenuate the vibrations from the road surface. A first connecting member 60 is provided at the lower part of the left shock absorber 30. A first steering connection portion 61 and a first leaf spring connection portion 62 are provided on the first connecting member 60. The first steering connection portion 61 is used to connect to the left steering knuckle 10, and the first leaf spring connection portion 62 is used to connect to the leaf spring 50. Among them, the first connecting member 60 can be set as structures such as a sleeve, profile, etc., and can be fixedly connected to the lower part of the left shock absorber 30 by means of socket connection, plug connection, screw connection, etc. In this embodiment, the first connecting member 60 is a sleeve, sleeved on the lower part of the left shock absorber 30 and fixedly connected to the left shock absorber 30. Both ends of the leaf spring 50 are connected to the shock absorber, rather than to the steering knuckle, releasing the vertical movement of the wheel and effectively improving the movement response of the wheel.

[0038] Furthermore, the first steering connection portion 61 is a joint provided on the side wall of the first connecting member 60, and the first leaf spring connection portion 62 is also a joint provided on the side wall of the first connecting member 60. Of course, it is not limited to this. The first steering connection portion 61 and the first leaf spring connection portion 62 can also be set as structures such as protrusions, grooves, etc., as long as the connection requirements are met. Preferably, the first steering connection portion 61 and the first leaf spring connection portion 62 are arranged back to back, having the functions of dust prevention and reducing the wear of the connection portion.

[0039] Specifically, the upper part of the right shock absorber 40 is connected to the vehicle body to attenuate the vibrations from the road surface. A second connecting member 70 is provided at the lower part of the right shock absorber 40. A second steering connection portion 71 and a second leaf spring connection portion 72 are provided on the second connecting member 70. The second steering connection portion 71 is used to connect to the right steering knuckle 20, and the second leaf spring connection portion 72 is used to connect to the leaf spring 50. Among them, the second connecting member 70 can be set as structures such as a sleeve, profile, etc., and can be fixedly connected to the lower part of the right shock absorber 40 by means of socket connection, plug connection, screw connection, etc. In this embodiment, the second connecting member 70 is a sleeve, sleeved on the lower part of the right shock absorber 40 and fixedly connected to the right shock absorber 40.

[0040] Further, the second steering connection portion 71 is a joint provided on the side wall of the second connecting member 70, and the second leaf spring connection portion 72 is also a joint provided on the side wall of the second connecting member 70. Of course, it is not limited to this. The second steering connection portion 71 and the second leaf spring connection portion 72 can also be provided with structures such as protrusions and grooves, as long as the connection requirements are met. Preferably, the second steering connection portion 71 and the second leaf spring connection portion 72 are arranged in opposite directions.

[0041] Specifically, both ends of the leaf spring 50 are respectively provided with a first mounting portion 51 and a second mounting portion 52. The first mounting portion 51 is inserted and fixedly connected to the first leaf spring connection portion 62, and the second mounting portion 52 is inserted and fixedly connected to the second leaf spring connection portion 72. Among them, the first mounting portion 51 is a joint formed on one end of the leaf spring 50, and the second mounting portion 52 is a joint formed on the other end of the leaf spring 50. The first mounting portion 51 is inserted into the first leaf spring connection portion 62 to achieve insertion connection therewith, and the second mounting portion 52 is inserted into the second leaf spring connection portion 72 to achieve insertion connection therewith. Of course, it is not limited to this. The first mounting portion 51 and the second mounting portion 52 can also be provided with structures such as hollow and grooves, as long as the connection requirements are met. The ends of the leaf spring 50 can be processed to obtain the first mounting portion 51 and the second mounting portion 52 by means such as cutting and stamping.

[0042] In this embodiment, the first mounting portion 51 and the first leaf spring connection portion 62 are fixedly connected by bolts, and the second mounting portion 52 and the second leaf spring connection portion 72 are also fixedly connected by bolts, with stable connection. Of course, it is not limited to this. In other embodiments, other fixing methods such as welding can also be used.

[0043] Specifically, a first connecting arm 11 is provided on the left steering knuckle 10, and a second connecting arm 21 is provided on the right steering knuckle 20. Among them, the first connecting arm 11 is fixedly connected to the first steering connection portion 61, and the second connecting arm 21 is fixedly connected to the second steering connection portion 71. In this embodiment, after the first connecting arm 11 is inserted into the first steering connection portion 61, it is fixedly connected to the first steering connection portion 61 by bolts. After the second connecting arm is inserted into the second steering connection portion 71, it is fixedly connected to the second steering connection portion 71 by screws. Of course, it is not limited to this. In other embodiments, other fixing methods such as welding can also be used.

[0044] This application also provides an automobile, which adopts the rear suspension structure in any one of the above embodiments.

[0045] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0046] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the patent protection scope of the present application shall be subject to the appended claims.

Claims

1. A rear suspension structure used for transmitting force between a vehicle body and wheels, characterized in that: include: A left steering knuckle (10), used to be connected to the left wheel of the vehicle; A right steering knuckle (20) is symmetrically arranged with the left steering knuckle (10) and is used to be connected to the right wheel of the vehicle; A left shock absorber (30) connected to the left steering knuckle (10); a right shock absorber (40), which is symmetrically arranged with the left shock absorber (30) and connected to the right steering knuckle (20); The leaf spring (50) is arranged as a single-piece structure; the leaf spring (50) is arranged between the left shock absorber (30) and the right shock absorber (40), and the two ends of the leaf spring (50) are respectively connected to the left shock absorber (30) and the right shock absorber (40).

2. The rear suspension structure according to claim 1, characterized in that: The leaf spring (50) is a glass fiber structure / carbon fiber composite structure.

3. The rear suspension structure according to claim 1, characterized in that: The leaf spring (50) is in an arch shape.

4. The rear suspension structure according to claim 3, characterized in that: Along the height direction of the shock absorber, the middle portion of the leaf spring (50) is arched upward to form an arch shape.

5. The rear suspension structure according to claim 1, characterized in that: The upper part of the left shock absorber (30) is connected to the automobile body, and the lower part is provided with a first connecting member (60); the first connecting member (60) is provided with a first steering connecting part (61) and a first leaf spring connecting part (62); the first steering connecting part (61) is used to be connected to the left steering knuckle (10), and the first leaf spring connecting part (62) is used to be connected to the leaf spring (50).

6. The rear suspension structure according to claim 5, characterized in that: The first steering connection portion (61) and the first leaf spring connection portion (62) are arranged in back-to-back directions.

7. The rear suspension structure according to claim 5, characterized in that: The upper part of the right shock absorber (40) is connected to the automobile body, and the lower part is provided with a second connecting member (70); the second connecting member (70) is provided with a second steering connecting part (71) and a second leaf spring connecting part (72); the second steering connecting part (71) is used to be connected to the right steering knuckle (20), and the second leaf spring connecting part (72) is used to be connected to the leaf spring (50).

8. The rear suspension structure according to claim 7, characterized in that: The second steering connection portion (71) and the second leaf spring connection portion (72) are arranged in back-to-back directions.

9. The rear suspension structure according to claim 7, characterized in that: The two ends of the leaf spring (50) are respectively provided with a first mounting portion (51) and a second mounting portion (52); the first mounting portion (51) is plug-connected and fixedly connected to the first leaf spring connecting portion (62); and the second mounting portion (52) is plug-connected and fixedly connected to the second leaf spring connecting portion (72).

10. The rear suspension structure according to claim 7, characterized in that: The left steering knuckle (10) is provided with a first connecting arm (11), and the first connecting arm (11) is fixedly connected to the first steering connecting portion (61); the right steering knuckle (20) is provided with a second connecting arm (21), and the second connecting arm (21) is fixedly connected to the second steering connecting portion (71).

11. An automobile, said automobile adopting the rear suspension structure according to any one of claims 1 to 10.

Images