Double-wishbone suspension and vehicle

Abstract

The utility model relates to the technical field of suspensions, in particular to a double-wishbone suspension and a vehicle. The double-fork-arm suspension comprises a steering knuckle, an upper swing arm, a lower swing arm, an upper ball head and a lower ball head, and the upper swing arm is arranged above the lower swing arm in the vertical direction. Wherein one end of the upper swing arm is connected to the steering knuckle, and the other end is connected with the upper ball head and connected with a vehicle body through the upper ball head. One end of the lower swing arm is connected with the lower ball head and connected with the steering knuckle through the lower ball head, and the other end is connected with an auxiliary frame. According to the double-wishbone suspension and the vehicle, the problem that due to an existing double-wishbone suspension structure, the braking stability of the vehicle is poor is solved.

Description

Technical Field

[0001] The present application relates to the technical field of suspension, and in particular to a double wishbone suspension and a vehicle. Background Art

[0002] The kingpin is the central axis of rotation when the wheel rotates. In a double wishbone suspension, the kingpin is usually formed by the ball joint line of the upper and lower arm. The kingpin inclination angle is the angle between the kingpin and the plumb line. The parameter setting of the kingpin inclination angle greatly affects the vehicle's handling, stability and ride comfort. Among them, the distance between the intersection of the kingpin and the plumb line and the intersection of the wheel centerline and the ground is the kingpin offset.

[0003] In the related art, due to the factors of vehicle structural layout, the kingpin inclination angles of most vehicle models are relatively small, and the kingpin offset distance often takes a positive value when the vehicle is moving, that is, the intersection of the kingpin and the plumb line is on the inside of the intersection of the wheel centerline and the ground, which leads to poor braking stability of the vehicle. Utility Model Content

[0004] Based on this, it is necessary to provide a double wishbone suspension and a vehicle to solve the problem of poor vehicle braking stability caused by the existing double wishbone suspension structure.

[0005] The present application provides a double wishbone suspension, which includes a steering knuckle, an upper swing arm, a lower swing arm, an upper ball head and a lower ball head, wherein the upper swing arm is arranged above the lower swing arm in the vertical direction; wherein one end of the upper swing arm is connected to the steering knuckle, and the other end is connected to the upper ball head and connected to the vehicle body through the upper ball head, one end of the lower swing arm is connected to the lower ball head and connected to the steering knuckle through the lower ball head, and the other end is used to connect to the subframe.

[0006] In one embodiment, the upper swing arm includes a first upper support arm and a second upper support arm, one end of the second upper support arm is connected to one end of the first upper support arm, and the second upper support arm and the first upper support arm are arranged at an angle; wherein an upper ball head mounting hole is provided at the connection between the first upper support arm and the second upper support arm, and the upper ball head is installed in the upper ball head mounting hole.

[0007] In one of the embodiments, a first upper bushing mounting hole is formed at one end of the first upper support arm away from the upper ball head, and a second upper bushing mounting hole is formed at one end of the second upper support arm away from the upper ball head; the double wishbone suspension also includes a first upper bushing and a second upper bushing, the first upper bushing is installed in the first upper bushing mounting hole, the second upper bushing is installed in the second upper bushing mounting hole, and the upper swing arm is rotatably connected to the steering knuckle through the first upper bushing and the second upper bushing.

[0008] In one embodiment, the axis of the upper ball head mounting hole is perpendicular to the axes of the first upper bushing mounting hole and the second upper bushing mounting hole.

[0009] In one embodiment, the axis of the first upper bushing mounting hole and the axis of the second upper bushing mounting hole are coaxially arranged.

[0010] In one embodiment, the first upper support arm and the second upper support arm are an integrally cast part or an integrally forged part.

[0011] In one embodiment, the lower swing arm includes a first lower arm and a second lower arm, one end of the second lower arm is connected to the side of the first lower arm and is arranged at an angle with the first lower arm; wherein a lower ball head mounting hole is opened at one end of the first lower arm, and the lower ball head is installed in the lower ball head mounting hole.

[0012] In one of the embodiments, a first lower bushing mounting hole is formed at one end of the first lower arm away from the lower ball head, and a second lower bushing mounting hole is formed at one end of the second lower arm away from the first lower arm; the double wishbone suspension also includes a first lower bushing and a second lower bushing, the first lower bushing is installed in the first lower bushing mounting hole, the second lower bushing is installed in the second lower bushing mounting hole, and the lower swing arm is rotatably connected to the subframe through the first lower bushing and the second lower bushing.

[0013] In one embodiment, the first lower arm is further provided with an assembly hole for fixing the shock absorber.

[0014] The present application also provides a vehicle, which includes the double wishbone suspension described in any one of the above embodiments.

[0015] Compared with the prior art, the double wishbone suspension and vehicle provided by the present application, compared with the traditional structure in which both the upper and lower arms are connected to the steering knuckle through a ball head, the upper ball head is arranged at the end of the upper arm away from the steering knuckle, and the lower ball head is arranged at the end of the lower arm close to the steering knuckle, so the angle between the kingpin and the plumb line formed by the connecting line of the upper ball head and the lower ball head is larger than the angle formed by the traditional structure, which enables the intersection of the kingpin and the plumb line to be located outside the intersection of the wheel centerline and the ground, thereby effectively improving the parameters of the kingpin offset distance, reducing the algebraic value of the kingpin offset distance, and is conducive to improving the braking stability of the vehicle. In addition, the space required for the double wishbone suspension does not change much, reducing the probability of interference with the vehicle body, so that it inherits the lateral support capacity and excellent motion curve of the traditional double wishbone suspension while meeting the vehicle's performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic structural diagram of a double wishbone suspension according to an embodiment of the present application;

[0018] Figure 2 A side view of a double wishbone suspension according to an embodiment of the present application;

[0019] Figure 3 An exploded view of a double wishbone suspension according to an embodiment of the present application.

[0020] The symbols in the figure mean the following:

[0021] 100. Double wishbone suspension; 10. Steering knuckle; 101. First U-shaped groove; 102. Second U-shaped groove; 20. Upper swing arm; 201. Upper ball joint mounting hole; 202. First upper bushing mounting hole; 203. Second upper bushing mounting hole; 21. First upper support arm; 22. Second upper support arm; 30. Lower swing arm; 301. Lower ball joint mounting hole; 302. First lower bushing mounting hole; 303. Second lower bushing mounting hole; 304. Assembly hole; 31. First lower support arm; 32. Second lower support arm; 40. Upper ball joint; 50. Lower ball joint; 60. First upper bushing; 70. Second upper bushing; 80. First lower bushing; 90. Second lower bushing; 200. Subframe; 300. Shock absorber. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0023] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are in contact indirectly through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art 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 related listed items.

[0027] The kingpin is the central axis of rotation when the wheel rotates. In a double wishbone suspension, the kingpin is usually formed by the ball joint line of the upper and lower arm. The kingpin inclination angle is the angle between the kingpin and the plumb line. The parameter setting of the kingpin inclination angle greatly affects the vehicle's handling, stability and ride comfort. Among them, the distance between the intersection of the kingpin and the plumb line and the intersection of the wheel centerline and the ground is the kingpin offset.

[0028] In the related art, due to the factors of vehicle structural layout, the kingpin inclination angles of most vehicle models are relatively small, and the kingpin offset distance often takes a positive value when the vehicle is moving, that is, the intersection of the kingpin and the plumb line is on the inside of the intersection of the wheel centerline and the ground, which leads to poor braking stability of the vehicle.

[0029] See also Figure 1-Figure 3 In order to solve the problem of poor vehicle braking stability caused by the existing double wishbone suspension structure, the present application provides a double wishbone suspension 100. The double wishbone suspension 100 has strong lateral support capability and high linearity of motion parameter curvature, and can be applied to various mid-to-high-end vehicle models.

[0030] The double wishbone suspension 100 provided in the present application includes a steering knuckle 10, an upper swing arm 20, a lower swing arm 30, an upper ball head 40 and a lower ball head 50. In the vertical direction, the upper swing arm 20 is arranged above the lower swing arm 30. One end of the upper swing arm 20 is connected to the steering knuckle 10, and the other end is connected to the upper ball head 40 and connected to the vehicle body through the upper ball head 40. One end of the lower swing arm 30 is connected to the lower ball head 50 and connected to the steering knuckle 10 through the lower ball head 50, and the other end is used to connect to the subframe 200.

[0031] It can be understood that, compared with the conventional structure in which both the upper swing arm 20 and the lower swing arm 30 are connected to the steering knuckle 10 through a ball head, the double wishbone suspension 100 provided by the present application has an upper ball head 40 disposed at the end of the upper swing arm 20 away from the steering knuckle 10, and a lower ball head 50 disposed at the end of the lower swing arm 30 close to the steering knuckle 10. Therefore, the angle between the kingpin and the plumb line formed by the connecting line of the upper ball head 40 and the lower ball head 50 is larger than the angle formed by the conventional structure, which enables the intersection of the kingpin and the plumb line to be located outside the intersection of the wheel centerline and the ground, thereby effectively improving the parameters of the kingpin offset distance, reducing the algebraic value of the kingpin offset distance, and being conducive to improving the braking stability of the vehicle. In addition, the space required for the double wishbone suspension 100 does not change much, reducing the probability of interference with the vehicle body, so that it inherits the lateral support capacity and excellent motion curve linearity of the conventional double wishbone suspension 100 while meeting the vehicle's performance.

[0032] It should be noted that in order to clearly reflect the difference between the main pin in this application and the traditional structure, this application Figure 2 In the figure, the dotted line A represents the kingpin axis of the traditional structure, while the solid line B represents the kingpin axis in the structure of the present application.

[0033] In one embodiment, if Figure 3 As shown, the upper swing arm 20 includes a first upper arm 21 and a second upper arm 22, one end of the second upper arm 22 is connected to one end of the first upper arm 21, and the second upper arm 22 and the first upper arm 21 are arranged at an angle. That is, the first upper arm 21 and the second upper arm 22 form a structure similar to a triangle, thereby effectively ensuring the structural stability of the upper swing arm 20.

[0034] Further, an upper ball head mounting hole 201 is provided at the connection between the first upper support arm 21 and the second upper support arm 22, and the upper ball head 40 is mounted in the upper ball head mounting hole 201. In this way, the connection reliability between the upper ball head 40 and the upper swing arm 20 can be improved.

[0035] In one embodiment, if Figure 3 As shown, a first upper bushing mounting hole 202 is formed at one end of the first upper arm 21 away from the upper ball head 40, and a second upper bushing mounting hole 203 is formed at one end of the second upper arm 22 away from the upper ball head 40. The double wishbone suspension 100 further includes a first upper bushing 60 and a second upper bushing 70, wherein the first upper bushing 60 is mounted in the first upper bushing mounting hole 202, and the second upper bushing 70 is mounted in the second upper bushing mounting hole 203, and the upper swing arm 20 is rotatably connected to the steering knuckle 10 through the first upper bushing 60 and the second upper bushing 70. In this way, the upper swing arm 20 can achieve a flexible connection with the steering knuckle 10 through the first upper bushing 60 and the second upper bushing 70, further reducing the vibration generated when the vehicle moves, and can reduce the contact wear between the upper swing arm 20 and the steering knuckle 10, thereby improving the overall service life.

[0036] Specifically, the steering knuckle 10 is provided with a first U-shaped groove 101 corresponding to the first upper bushing 60 and a second U-shaped groove 102 corresponding to the second upper bushing 70 , thereby facilitating the connection between the first upper bushing 60 , the second upper bushing 70 and the steering knuckle 10 .

[0037] In one embodiment, the axis of the upper ball head mounting hole 201 is perpendicular to the axis of the first upper bushing mounting hole 202 and the second upper bushing mounting hole 203. In this way, the positioning and installation between the upper swing arm 20, the steering knuckle 10 and the vehicle body are facilitated, thereby reducing the difficulty of assembling the upper swing arm 20.

[0038] Furthermore, in one embodiment, the axis of the first upper bushing mounting hole 202 and the axis of the second upper bushing mounting hole 203 are coaxially arranged, so that the assembly difficulty of the upper swing arm 20 is further reduced.

[0039] In one embodiment, the first upper support arm 21 and the second upper support arm 22 are integrally cast or forged parts, thereby greatly improving the structural rigidity and strength of the upper swing arm 20.

[0040] In one embodiment, if Figure 1 and Figure 3 As shown, the lower swing arm 30 includes a first lower arm 31 and a second lower arm 32, one end of the second lower arm 32 is connected to the side of the first lower arm 31 and is arranged at an angle with the first lower arm 31. A lower ball head mounting hole 301 is opened at one end of the first lower arm 31, and the lower ball head 50 is installed in the lower ball head mounting hole 301.

[0041] In this way, the restraining ability of the lower arm 30 on the wheel movement can be ensured, so that the wheel can move up and down in the vertical direction under the cooperation of the lower cantilever and the upper arm 20. At this time, the vibration generated when the wheel moves up and down can be reduced by the shock absorber 300, etc., thereby improving the stability of the vehicle when driving.

[0042] To facilitate the installation of the shock absorber 300, in one embodiment, Figure 3 As shown, the first lower arm 31 is also provided with an assembly hole 304 for fixing the shock absorber 300, so as to improve the connection strength between the shock absorber 300 and the lower swing arm 30. Among them, one end of the shock absorber 300 away from the first lower arm 31 is used to connect the vehicle body.

[0043] Furthermore, a first lower bushing mounting hole 302 is formed at one end of the first lower arm 31 away from the lower ball head 50, and a second lower bushing mounting hole 303 is formed at one end of the second lower arm 32 away from the first lower arm 31. The double wishbone suspension 100 further includes a first lower bushing 80 and a second lower bushing 90, wherein the first lower bushing 80 is mounted in the first lower bushing mounting hole 302, and the second lower bushing 90 is mounted in the second lower bushing mounting hole 303, and the lower arm 30 is rotatably connected to the subframe 200 through the first lower bushing 80 and the second lower bushing 90. In this way, the lower arm 30 can achieve a flexible connection with the vehicle body through the first lower bushing 80 and the second lower bushing 90, further reducing the vibration generated when the vehicle moves, and reducing the contact wear between the lower arm 30 and the vehicle body, thereby improving the overall service life.

[0044] Similarly, the first lower arm 31 and the second lower arm 32 are integrally cast or forged parts, thus greatly improving the structural rigidity and strength of the lower swing arm 30.

[0045] The present application further provides a vehicle, which includes a subframe 200 and the double wishbone suspension 100 described in any one of the above embodiments, wherein the double wishbone suspension 100 is symmetrically arranged on two opposite sides of the subframe 200 .

[0046] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A double wishbone suspension, characterized in that: The invention comprises a steering knuckle (10), an upper swing arm (20), a lower swing arm (30), an upper ball head (40) and a lower ball head (50), wherein the upper swing arm (20) is arranged above the lower swing arm (30) in the vertical direction; One end of the upper swing arm (20) is connected to the steering knuckle (10), and the other end is connected to the upper ball head (40) and connected to the vehicle body through the upper ball head (40); one end of the lower swing arm (30) is connected to the lower ball head (50) and connected to the steering knuckle (10) through the lower ball head (50), and the other end is used to connect to the subframe (200).

2. The double wishbone suspension according to claim 1, characterized in that: The upper swing arm (20) comprises a first upper support arm (21) and a second upper support arm (22), one end of the second upper support arm (22) is connected to one end of the first upper support arm (21), and the second upper support arm (22) and the first upper support arm (21) are arranged at an angle; An upper ball head mounting hole (201) is provided at the connection between the first upper support arm (21) and the second upper support arm (22), and the upper ball head (40) is mounted in the upper ball head mounting hole (201).

3. The double wishbone suspension according to claim 2, characterized in that: A first upper bushing mounting hole (202) is formed at one end of the first upper support arm (21) away from the upper ball head (40), and a second upper bushing mounting hole (203) is formed at one end of the second upper support arm (22) away from the upper ball head (40); The double wishbone suspension also includes a first upper bushing (60) and a second upper bushing (70), wherein the first upper bushing (60) is installed in the first upper bushing mounting hole (202), and the second upper bushing (70) is installed in the second upper bushing mounting hole (203), and the upper swing arm (20) is rotatably connected to the steering knuckle (10) via the first upper bushing (60) and the second upper bushing (70).

4. The double wishbone suspension according to claim 3, characterized in that: The axis of the upper ball head mounting hole (201) is perpendicular to the axes of the first upper bushing mounting hole (202) and the second upper bushing mounting hole (203).

5. The double wishbone suspension according to claim 4, characterized in that: The axis of the first upper bushing mounting hole (202) and the axis of the second upper bushing mounting hole (203) are coaxially arranged.

6. The double wishbone suspension according to claim 2, characterized in that: The first upper support arm (21) and the second upper support arm (22) are integrally cast or forged parts.

7. The double wishbone suspension according to claim 1, characterized in that: The lower swing arm (30) comprises a first lower arm (31) and a second lower arm (32); one end of the second lower arm (32) is connected to a side portion of the first lower arm (31) and is arranged at an angle to the first lower arm (31); Wherein, a lower ball head mounting hole (301) is provided at one end of the first lower support arm (31), and the lower ball head (50) is mounted in the lower ball head mounting hole (301).

8. The double wishbone suspension according to claim 7, characterized in that: A first lower bushing mounting hole (302) is formed at one end of the first lower support arm (31) away from the lower ball head (50), and a second lower bushing mounting hole (303) is formed at one end of the second lower support arm (32) away from the first lower support arm (31); The double wishbone suspension also includes a first lower bushing (80) and a second lower bushing (90), wherein the first lower bushing (80) is installed in the first lower bushing mounting hole (302), and the second lower bushing (90) is installed in the second lower bushing mounting hole (303), and the lower swing arm (30) is rotatably connected to the subframe (200) via the first lower bushing (80) and the second lower bushing (90).

9. The double wishbone suspension according to claim 7, characterized in that: The first lower support arm (31) is also provided with an assembly hole (304) for fixing the shock absorber (300).

10. A vehicle, characterized in that: It comprises a double wishbone suspension as described in any one of claims 1 to 9.

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