Bushing structure and automobile lower swing arm assembly

Abstract

The invention relates to the field of automobile accessory equipment, and provides a bushing structure and an automobile lower swing arm assembly.The bushing structure comprises a bushing body, two first vibration reduction holes are distributed in the circumferential direction of the bushing body at intervals, and the first vibration reduction holes extend in the axial direction of the bushing body; the hole wall of the first vibration reduction hole is provided with an arc-shaped part, and a first convex peak part, a second convex peak part and a third convex peak part which are opposite to the arc-shaped part; the peak point of the second convex peak part is higher than the first convex peak part and the second convex peak part; when the axial deflection of the bushing body is smaller than or equal to the first deflection, the second convex peak part is separated from the arc-shaped part; when the axial deflection of the lining body is larger than the first deflection and smaller than or equal to the second deflection, the second convex peak part abuts against the arc-shaped part. When the axial deflection of the lining body is larger than the second deflection, the first convex peak part, the second convex peak part and the third convex peak part abut against the arc-shaped part, the whole lining structure has the good buffering and damping performance on a vehicle body chassis, and the controllability and stability of a vehicle are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile accessories and equipment, and in particular to a bushing structure and an automobile lower swing arm assembly. Background Art

[0002] The bushing structure is used to connect the chassis and the lower arm of the car. The lower arm of the car is connected to the wheel axle. The wheel transmits the vibration impact force from the ground to the lower arm of the car. As a bridge connecting the lower arm of the car and the chassis, the bushing structure can absorb the vibration energy of the road, thereby reducing the bumpiness of the car body and improving the stability and comfort of the vehicle.

[0003] Since the chassis mainly bears the vertical impact from the road, the existing bushing structure's vibration reduction structure can provide certain anti-vibration protection for the chassis in the vertical direction. However, when the road condition is poor, the vehicle travels on an uneven road surface, and the vibration impact energy of the road on the chassis increases sharply, which in turn weakens the buffering and protective performance of the bushing structure on the chassis. The vibration and noise of the whole vehicle are large, which not only affects the driving experience, but also reduces the vehicle's handling and stability. Summary of the invention

[0004] The invention provides a bushing structure and a lower swing arm assembly of an automobile, which are used to solve the problem that the bushing structure in the prior art has a weak buffering and shock absorbing performance on a vehicle body, thereby reducing the controllability and stability of the vehicle.

[0005] In a first aspect, the present invention provides a bushing structure, comprising: a bushing body, the bushing body being fixedly connected to a lower arm of an automobile, the bushing body having a through hole for inserting a fixed shaft of a vehicle chassis, the bushing body having two first vibration-damping holes spaced apart in the circumferential direction, the first vibration-damping holes extending along the axial direction of the bushing body; the hole wall of the first vibration-damping hole having an arc-shaped portion and a first convex peak portion, a second convex peak portion and a third convex peak portion opposite to the arc-shaped portion, the peak point of the second convex peak portion being higher than the first convex peak portion and the second convex peak portion; When the axial deflection of the bushing body is less than or equal to the first deflection, the second convex peak portion and the arc-shaped portion are separated; When the axial deflection of the bushing body is greater than the first deflection and less than or equal to the second deflection, the second convex peak portion abuts against the arc portion; When the axial deflection of the bushing body is greater than the second deflection, the first convex peak portion, the second convex peak portion and the third convex peak portion are all in contact with the arc portion; Wherein, the first deflection is smaller than the second deflection.

[0006] According to a bushing structure provided by the present invention, the two first vibration-damping holes are symmetrically arranged along the forward direction of the vehicle.

[0007] According to a bushing structure provided by the present invention, the bushing body is provided with a second vibration-damping hole, the second vibration-damping hole is located between the two first vibration-damping holes, the second vibration-damping hole has two connected bending sections, the two bending sections are symmetrically arranged along the forward direction of the vehicle, and the two bending sections are both facing the hole wall of the through hole; When the radial deflection of the bushing body is greater than the third deflection, the ends of the two bending sections abut against each other.

[0008] According to a bushing structure provided by the present invention, there are two second vibration-damping holes, and the two second vibration-damping holes and the two first vibration-damping holes are alternately arranged along the radial direction of the bushing body.

[0009] According to a bushing structure provided by the present invention, the two second vibration-damping holes are symmetrically arranged along the lateral direction of the vehicle.

[0010] A bushing structure provided according to the present invention further includes a bearing shell, and the hole wall of the through hole and the outer side wall of the bearing shell are vulcanized and connected.

[0011] A bushing structure provided according to the present invention further includes an outer bushing, which is sleeved on the bushing body. The outer bushing is provided with a plurality of vibration-damping holes, and the plurality of vibration-damping holes are evenly distributed along the radial direction of the outer bushing.

[0012] According to a bushing structure provided by the present invention, the inner side wall of the outer bushing is cold-sheathedly connected to the outer side wall of the bushing body.

[0013] According to a bushing structure provided by the present invention, the bushing body is made of high-damping rubber material.

[0014] In a second aspect, the present invention further provides a lower arm assembly for an automobile, comprising: a lower arm for an automobile, a ball pin, a sleeve structure and a bushing structure as described in any one of the above items, wherein the ball pin is rotatably mounted on a first end of the lower arm for an automobile and is used to be connected to a wheel shaft, the bushing body is fixedly mounted on a second end of the lower arm for an automobile and is used to be connected to a fixed shaft of a vehicle chassis, and the sleeve structure is fixedly mounted on a third end of the lower arm for an automobile; Wherein, the specific structures of the shaft sleeve structure and the bushing structure are the same.

[0015] The present invention provides a bushing structure and a lower arm assembly of an automobile, wherein two first vibration-damping holes are distributed at intervals in the circumferential direction of the bushing body, the first vibration-damping hole extends along the axial direction of the bushing body, the bushing body is installed between the lower arm of the automobile and the chassis of the vehicle body, when the bushing body is in a state where its axial deflection is less than or equal to the first deflection, the first vibration-damping hole is in a through state, and the bushing body has greater flexibility in the height direction of the vehicle, thereby blocking the vibration transmission between the lower arm of the automobile and the chassis of the vehicle body in the vertical direction; when the bushing body is in a state where its axial deflection is greater than the first deflection and less than or equal to the second deflection, the second convex peak portion abuts against the arc portion, the flexibility of the first vibration-damping hole in the vertical direction is weakened, and the bushing body The overall rigidity of the bushing body is increased, thereby forming an effective support between the vehicle body chassis and the lower arm of the automobile, thereby alleviating the vibration impact of the lower arm of the automobile on the vehicle body chassis in the vertical direction; when the axial deflection of the bushing body is greater than the second deflection, the first convex peak portion, the second convex peak portion and the third convex peak portion abut against the arc portion at the same time, the flexibility of the first vibration-damping hole in the vertical direction is further weakened, and the overall rigidity of the bushing body is further increased, thereby forming a more stable support between the lower arm of the automobile and the vehicle body chassis, further alleviating the vibration impact of the lower arm of the automobile on the vehicle body chassis in the vertical direction, and the entire bushing structure has better buffering and shock-absorbing performance on the vehicle body chassis, thereby improving the handling and stability of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a top view of the bushing structure provided by the present invention.

[0018] Figure 2 It is a side schematic diagram of the bushing structure provided by the present invention.

[0019] Figure 3 This is one of the structural schematic diagrams of the automobile lower swing arm assembly provided by the present invention.

[0020] Figure 4 This is the second structural schematic diagram of the automobile lower swing arm assembly provided by the present invention.

[0021] Reference numerals: 1. Bushing structure; 2. Automobile lower arm; 3. Ball pin; 4. Bushing structure; 11. Bushing body; 111. First vibration-damping hole; 1111. Arc-shaped portion; 1112. First convex peak portion; 1113. Second convex peak portion; 1114. Third convex peak portion; 112. Second vibration-damping hole; 1121. Bend section; 113. Through hole. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The features of the terms "first" and "second" in the specification and claims of the present invention may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0024] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Combine the following Figure 1-Figure 4 , through specific embodiments and application scenarios, a bushing structure and a lower arm assembly of an automobile provided by an embodiment of the present invention are described in detail.

[0027] like Figure 1 and Figure 2 As shown, the present invention provides a bushing structure 1, including: a bushing body 11. The bushing body 11 is used to be fixedly connected to the lower arm 2 of the automobile. The bushing body 11 has a through hole 113 for inserting a fixed shaft of the vehicle body chassis. Two first vibration-damping holes 111 are distributed at intervals in the circumferential direction of the bushing body 11. The first vibration-damping hole 111 extends along the axial direction of the bushing body 11. The hole wall of the first vibration-damping hole 111 has an arc-shaped portion 1111 and a first convex peak portion 1112, a second convex peak portion 1113 and a third convex peak portion 1114 opposite to the arc-shaped portion 1111. The peak point of the second convex peak portion 1113 is higher than the first convex peak portion 1112 and the second convex peak portion 1113.

[0028] When the axial deflection of the bushing body 11 is less than or equal to the first deflection, the second convex peak portion 1113 and the arc-shaped portion 1111 are separated.

[0029] When the axial deflection of the bushing body 11 is greater than the first deflection and less than or equal to the second deflection, the second convex peak portion 1113 abuts against the arc portion 1111 .

[0030] When the axial deflection of the bushing body 11 is greater than the second deflection, the first convex peak portion 1112 , the second convex peak portion 1113 and the third convex peak portion 1114 are all in contact with the arc portion 1111 .

[0031] The first deflection is smaller than the second deflection.

[0032] It is understandable that if Figure 1 As shown, the bushing body 11 is provided with two first vibration-damping holes 111 at intervals in the radial direction. Both first vibration-damping holes 111 extend along the axial direction of the bushing body 11. When the bushing structure 1 is installed between the vehicle chassis and the lower arm 2 of the vehicle, the extension direction of the first vibration-damping holes 111 coincides with the height direction of the vehicle. Figure 1 As shown, the first vibration damping hole 111 is irregularly shaped. The hole wall of the first vibration damping hole 111 has an arc-shaped portion 1111. The arc-shaped portion 1111 extends radially along the bushing body 11. The two ends of the arc-shaped portion 1111 are respectively bent toward the inside of the bushing body 11, the first convex peak portion 1112 is connected to one of the turning points, and the third convex peak portion 1114 is connected to another turning point. The second convex peak portion 1113 is located between the first convex peak portion 1112 and the third convex peak portion 1114, and the first convex peak portion 1112, the second convex peak portion 1113 and the third convex peak portion 1114 are connected in sequence. As a result, the arc-shaped portion 1111 is respectively arranged opposite to the three convex peak portions.

[0033] Optionally, the two first vibration-damping holes 111 are symmetrically arranged along the forward direction of the vehicle. The two first vibration-damping holes 111 simultaneously provide vibration-proof protection for the vehicle chassis on the left and right sides of the vehicle chassis, ensuring that the force on the left and right sides of the vehicle chassis is balanced.

[0034] It is understandable that the deflection is used to measure the specific deformation degree of the bushing body 11 in a certain direction. In the embodiment of the present invention, the first deflection is 20% of the ultimate deflection of the bushing body 11 in the vertical direction. The second deflection is 60% of the ultimate deflection of the bushing body 11 in the vertical direction. The vertical direction refers to the axial direction of the first vibration damping hole 111 of the bushing body 11 in the installed state, which can also be understood as the height direction of the vehicle.

[0035] When the axial deflection of the bushing body 11 is less than or equal to the first deflection, that is, when the bushing body 11 is subjected to a small vibration impact from the road surface, the arc portion 1111 of each first vibration-damping hole 111 does not contact the corresponding first convex peak portion 1112, second convex peak portion 1113 and third convex peak portion 1114. At this time, the first vibration-damping hole 111 is in a through state, and the bushing body 11 has greater flexibility in the vehicle height direction, thereby blocking the vibration transmission between the lower arm 2 of the automobile and the vehicle chassis in the vertical direction, and improving the stability of the vehicle chassis.

[0036] When the axial deflection of the bushing body 11 is greater than the first deflection and less than or equal to the second deflection, the second peak portion 1113 of each first vibration damping hole 111 conflicts with its corresponding arc portion 1111. At this time, the flexibility of the first vibration damping hole 111 in the vertical direction is weakened, and the overall stiffness of the bushing body 11 is increased, thereby forming an effective support between the vehicle chassis and the lower arm 2 of the automobile, thereby alleviating the vibration impact of the lower arm 2 of the automobile on the vehicle chassis in the vertical direction.

[0037] When the axial deflection of the bushing body 11 is greater than the second deflection, the first convex peak 1112, the second convex peak 1113 and the third convex peak 1114 of each first vibration damping hole 111 simultaneously conflict with the corresponding arc portion 1111. At this time, the flexibility of the first vibration damping hole 111 in the vertical direction is further weakened, and the overall stiffness of the bushing body 11 is further increased, thereby forming a more stable support between the automobile lower control arm 2 and the vehicle body chassis, further alleviating the vibration impact of the automobile lower control arm 2 on the vehicle body chassis in the vertical direction.

[0038] The present invention provides a bushing structure 1, wherein two first vibration-damping holes 111 are distributed at intervals in the circumferential direction of a bushing body 11, and the first vibration-damping holes 111 extend along the axial direction of the bushing body 11. The bushing body 11 is installed between a lower arm 2 of an automobile and a chassis of a vehicle body. When the bushing body 11 has an axial deflection less than or equal to a first deflection, the first vibration-damping holes 111 are in a through state, and the bushing body 11 has greater flexibility in the height direction of the vehicle, thereby blocking the vibration transmission between the lower arm 2 of the automobile and the chassis of the vehicle body in the vertical direction; when the bushing body 11 has an axial deflection greater than the first deflection and less than or equal to the second deflection, the second convex peak portion 1113 abuts against the arc portion 1111, and the flexibility of the first vibration-damping hole 111 in the vertical direction is weakened, and the bushing body 11 The overall rigidity of the bushing body 11 is increased, thereby forming an effective support between the vehicle body chassis and the lower arm 2 of the automobile, thereby alleviating the vibration impact of the lower arm 2 of the automobile on the vehicle body chassis in the vertical direction; when the axial deflection of the bushing body 11 is greater than the second deflection, the first convex peak portion 1112, the second convex peak portion 1113 and the third convex peak portion 1114 are simultaneously in contact with the arc portion 1111, and the flexibility of the first vibration-damping hole 111 in the vertical direction is further weakened, and the overall rigidity of the bushing body 11 is further increased, thereby forming a more stable support between the lower arm 2 of the automobile and the vehicle body chassis, further alleviating the vibration impact of the lower arm 2 of the automobile on the vehicle body chassis in the vertical direction, and the entire bushing structure 1 has better buffering and shock-absorbing performance on the vehicle body chassis, thereby improving the vehicle's handling and stability.

[0039] Furthermore, in some embodiments, Figure 1 As shown, the bushing body 11 is provided with a second vibration damping hole 112. The second vibration damping hole 112 is located between the two first vibration damping holes 111. The second vibration damping hole 112 has two connected bending sections 1121. The two bending sections 1121 are symmetrically arranged along the forward direction of the vehicle, and both of the two bending sections 1121 face the hole wall of the through hole 113.

[0040] When the radial deflection of the bushing body 11 is greater than the third deflection, the two bending sections 1121 abut against each other.

[0041] Specifically, Figure 1 As shown, the second vibration damping hole 112 is C-shaped. The second vibration damping hole 112 is divided into two connected bending sections 1121. Each bending section 1121 is L-shaped. When the bushing body 11 is installed, the two bending sections 1121 are symmetrically arranged along the forward direction of the vehicle, so that the second vibration damping hole 112 forms a C-shaped vibration damping hole. Through this design, the bushing body 11 can form a buffering and vibration damping protection for the vehicle chassis in the longitudinal and transverse directions of the vehicle.

[0042] It should be noted that the third deflection is 40% of the limit deflection of the bushing body 11 in the longitudinal direction of the vehicle. When the radial deflection of the bushing body 11 is less than or equal to the third deflection, the second vibration-damping hole 112 is in a through state, and the hole walls of the second vibration-damping hole 112 along its circumference do not contact each other, so that the bushing body 11 has greater flexibility in the longitudinal and lateral directions of the vehicle, thereby blocking the vibration transmission between the lower arm 2 of the automobile and the chassis in the horizontal direction, and improving the stability of the chassis.

[0043] When the radial deflection of the bushing body 11 is greater than the third deflection, the ends of the two bending sections 1121 abut against each other, thereby reducing the flexibility of the bushing body 11 in the horizontal direction and increasing the overall stiffness of the bushing body 11 in the horizontal direction, thereby effectively supporting the vehicle chassis and the lower control arm 2 of the automobile in the horizontal direction, thereby alleviating the vibration impact of the lower control arm 2 of the automobile on the vehicle chassis in the horizontal direction.

[0044] By providing the first vibration-damping hole 111 and the second vibration-damping hole 112 , the bushing body 11 can provide buffering protection for the vehicle chassis in the vertical and horizontal directions, thereby reducing the vibration and noise of the entire vehicle, improving the smoothness of vehicle handling, and enhancing the driving experience.

[0045] like Figure 1 As shown, there are two second vibration-damping holes 112. The two second vibration-damping holes 112 and the two first vibration-damping holes 111 are arranged alternately along the radial direction of the bushing body 11 to further ensure that the bushing body 11 can provide buffer protection for the vehicle chassis in both horizontal and vertical directions to ensure the stability of the vehicle.

[0046] Preferably, the two second vibration-damping holes 112 are symmetrically arranged along the lateral direction of the vehicle. The two second vibration-damping holes 112 simultaneously provide vibration-proof protection for the vehicle chassis at the front and rear sides, ensuring balanced force on the front and rear sides of the vehicle chassis.

[0047] In some embodiments, the bushing structure 1 further comprises a bearing bushing, wherein the bearing bushing has good wear resistance, corrosion resistance and lubricity, and can be a hydrophilic super-slip bearing bushing, such as a polyetheretherketone bearing bushing or a polytetrafluoroethylene bearing bushing.

[0048] The fixed shaft of the chassis is inserted into the bearing bushing to bear the weight and load of the fixed shaft through the bearing bushing. At the same time, the smooth surface of the bearing bushing ensures the smoothness of the connection between the bushing structure 1 and the fixed shaft, reducing the wear and loss of the bushing structure 1. At the same time, the bearing bushing has a centering function to prevent the fixed shaft from deflecting.

[0049] The hole wall of the through hole 113 and the outer side wall of the bearing shell are vulcanized to improve the reliability of the connection between the bushing body 11 and the bearing shell.

[0050] In some embodiments, the bushing structure 1 further comprises an outer bushing. The outer bushing is sleeved on the bushing body 11. The outer bushing is provided with a plurality of vibration-damping holes, and the plurality of vibration-damping holes are evenly spaced along the radial direction of the outer bushing.

[0051] The outer bushing is sleeved on the outside of the bushing body 11, and the outer bushing is made of a rubber material with excellent vibration reduction performance. The outer bushing is provided with a plurality of vibration reduction channels, which are evenly spaced along the radial direction of the outer bushing. The diameter and depth of each vibration reduction channel are precisely calculated to optimize its vibration reduction effect.

[0052] Optionally, there are eight vibration reduction holes, which are located at different positions of the outer bushing to form a uniform vibration reduction layout. This design can effectively absorb and disperse the vibration generated during the operation of the vehicle, thereby reducing the impact force on the bushing body 11 and its connecting parts.

[0053] In specific applications, the outer bushing is connected to the bushing body 11 by hot pressing or mechanical fixing to ensure a close fit between the two. The design of the vibration reduction channel improves the buffering performance of the entire bushing structure 1, significantly reduces the vibration noise of the entire vehicle, and improves the comfort and safety of the vehicle.

[0054] In some embodiments, the inner wall of the outer bushing is cold-fitted to the outer wall of the bushing body 11 to reduce the difficulty of installation, avoid damage to the bushing body 11, and enhance the reliability of the connection.

[0055] The bushing body 11 is made of high damping rubber material. When the bushing body 11 is subjected to external impact load, the bushing body 11 absorbs vibration energy through the damping effect of the first vibration-damping hole 111 and the second vibration-damping hole 112 and the high damping material, reduces vibration capacity, reduces vibration transmission, reduces vibration load on the vehicle chassis, and thus improves the reliability of transmission between the lower arm 2 of the automobile and the vehicle chassis.

[0056] The high damping material may be rubber or foam, etc. The high damping material has a damping effect, can absorb vibration energy, and reduce the transmission of vibration.

[0057] In a specific embodiment, the bushing structure 1 provided by the present invention and the bushing structure in the prior art were respectively subjected to a rough cement road surface smoothness test, and the comparison results are shown in the following table:

[0058] For the bushing structure in the prior art, at a lateral acceleration of 0.2g, the difference in the side slip angles between the front and rear axles of the vehicle is 0.1483 (deg), and the understeer degree is 0.7415 (deg / g); for the bushing structure provided in the embodiment of the present invention, at a lateral acceleration of 0.2g, the difference in the side slip angles between the front and rear axles of the vehicle is 0.2316 (deg), and the understeer degree is 1.158 (deg / g), thereby improving the understeer degree and significantly reducing the acceleration of the center of mass of the vehicle body in the vertical direction, thereby improving the handling stability of the entire vehicle.

[0059] Second, as Figure 3 and Figure 4 As shown, the present invention also provides a lower swing arm assembly for an automobile, comprising: a lower swing arm 2 for an automobile, a ball pin 3, a sleeve structure 4 and the bushing structure 1 as described above. The ball pin 3 is rotatably mounted on the first end of the lower swing arm 2 for connecting to the wheel axle. The bushing body 11 is fixedly mounted on the second end of the lower swing arm 2 for connecting to the fixed axle of the vehicle chassis. The sleeve structure 4 is fixedly mounted on the third end of the lower swing arm 2 for an automobile.

[0060] The specific structures of the sleeve structure 4 and the bushing structure 1 are the same.

[0061] The automobile lower arm assembly is an important component in the automobile suspension system, which is used to connect the wheels and the vehicle body. The main function of the automobile lower arm 2 is to support the vehicle body, control the movement trajectory of the wheels, and absorb the vibration energy of the road surface, thereby improving the stability and comfort of the vehicle body. Among them, the automobile lower arm assembly is mainly connected to the vehicle body chassis through the bushing structure 1 fixed on the automobile lower arm 2, and the ball pin 3 of the automobile lower arm assembly is connected to the wheel axle. The bushing structure 1 absorbs the vibration of the road surface and reduces the impact energy of the vehicle body, thereby improving the stability and comfort of the vehicle.

[0062] Since the automobile lower arm assembly includes a bushing structure 1, and the specific structure of the bushing structure 1 refers to the above embodiment, the automobile lower arm assembly of this embodiment includes all the technical solutions of the above embodiment, and therefore at least has all the beneficial effects achieved by all the technical solutions of the above embodiment, which will not be repeated here one by one.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bushing structure, characterized in that: include: A bushing body, the bushing body is used for fixed connection with a lower arm of an automobile, the bushing body has a through hole for inserting a fixed shaft of a vehicle chassis, the bushing body has two first vibration-damping holes spaced apart in the circumferential direction, the first vibration-damping holes extend along the axial direction of the bushing body; the hole wall of the first vibration-damping hole has an arc-shaped portion and a first convex peak portion, a second convex peak portion and a third convex peak portion opposite to the arc-shaped portion, and the peak point of the second convex peak portion is higher than the first convex peak portion and the second convex peak portion; When the axial deflection of the bushing body is less than or equal to the first deflection, the second convex peak portion and the arc-shaped portion are separated; When the axial deflection of the bushing body is greater than the first deflection and less than or equal to the second deflection, the second convex peak portion abuts against the arc portion; When the axial deflection of the bushing body is greater than the second deflection, the first convex peak portion, the second convex peak portion and the third convex peak portion are all in contact with the arc portion; Wherein, the first deflection is smaller than the second deflection.

2. The bushing structure according to claim 1, characterized in that: Along the forward direction of the vehicle, the two first vibration-damping holes are symmetrically arranged.

3. The bushing structure according to claim 1, characterized in that: The bushing body is provided with a second vibration-damping hole, the second vibration-damping hole is located between the two first vibration-damping holes, the second vibration-damping hole has two connected bending sections, the two bending sections are symmetrically arranged along the forward direction of the vehicle, and the two bending sections are both facing the hole wall of the through hole; When the radial deflection of the bushing body is greater than the third deflection, the ends of the two bending sections abut against each other.

4. The bushing structure according to claim 3, characterized in that: There are two second vibration-damping holes, and the two second vibration-damping holes and the two first vibration-damping holes are alternately arranged along the radial direction of the bushing body.

5. The bushing structure according to claim 4, characterized in that: Along the lateral direction of the vehicle, the two second vibration-damping holes are symmetrically arranged.

6. The bushing structure according to claim 1, characterized in that: It also includes a bearing shell, and the hole wall of the through hole and the outer side wall of the bearing shell are vulcanized and connected.

7. The bushing structure according to claim 1, characterized in that: It also includes an outer bushing, which is sleeved on the bushing body. The outer bushing is provided with a plurality of vibration-damping holes, and the plurality of vibration-damping holes are evenly distributed along the radial direction of the outer bushing.

8. The bushing structure according to claim 7, characterized in that: The inner side wall of the outer bushing is cold-shroudedly connected to the outer side wall of the bushing body.

9. The bushing structure according to claim 1, characterized in that: The bushing body is made of high-damping rubber material.

10. A lower arm assembly for an automobile, characterized in that: include: A lower arm of an automobile, a ball pin, a sleeve structure, and a bushing structure as claimed in any one of claims 1 to 9, wherein the ball pin is rotatably mounted on the first end of the lower arm of the automobile and is used to be connected to the wheel shaft, the bushing body is fixedly mounted on the second end of the lower arm of the automobile and is used to connect to the fixed shaft of the vehicle chassis, and the sleeve structure is fixedly mounted on the third end of the lower arm of the automobile; Wherein, the specific structures of the shaft sleeve structure and the bushing structure are the same.

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