CN218971714U

CN218971714U - Novel auxiliary frame bushing with buffer block

Info

Publication number: CN218971714U
Application number: CN202223416851.3U
Authority: CN
Inventors: 汤焰钦; 陈雪飞; 欧阳晖传; 潘绍非; 陈煕
Original assignee: Jianxin Zhaos Technology Co Ltd
Current assignee: Jianxin Zhaos Technology Co Ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-05-05
Anticipated expiration: 2032-12-20

Abstract

The utility model discloses a novel auxiliary frame bushing with a buffer block, which comprises an inner core, an outer sleeve, a bushing main body and the buffer block; the inner core is wrapped by the bushing main body, and the outer sleeve is sleeved on the bushing main body; the buffer block is arranged at one end of the bushing main body and is in vulcanization connection with the bushing main body; the buffer block is also provided with a convex matching limiting block which is in limiting matching with a corresponding structure of the automobile; in the utility model, the buffer block is arranged at one end of the bushing main body, and the impact force and vibration received by the buffer block are relieved, so that the effect of integrally relieving the impact force and vibration is improved; still be provided with the cooperation stopper on the buffer block, through the cooperation of the corresponding position of cooperation stopper and car for the contact between buffer block and the automobile body is inseparabler, and when the vehicle appears big load change when traveling on the road section of rolling, the position of buffer block is injectd to the cooperation stopper, makes the automobile body can be faster stable, alleviates the impact that the automobile body received and feel.

Description

Novel auxiliary frame bushing with buffer block

Technical Field

The utility model relates to the field of design and manufacture of automobile parts, in particular to a novel auxiliary frame bushing with a buffer block.

Background

With the development of the automobile industry, the automobile types are more and more abundant, and the requirements of people on the automobile are higher and higher, so that the automobile is not only in cost performance, but also in operation stability and comfort.

The auxiliary frame bushing is arranged between the auxiliary frame and the vehicle body, so that the vibration of wheels is effectively restrained, and the comfort of passengers in the vehicle is improved; however, most of the sub-frame bushings on the market are not provided with buffer blocks, so that the vehicle swings up and down greatly when running on a wave road section, and riding comfort of the vehicle is further affected.

Disclosure of Invention

The utility model overcomes the defects of the prior art and provides the novel auxiliary frame bushing with the buffer block, which has the advantages of simple structure, reasonable design and comfortable riding.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

a novel auxiliary frame bushing with a buffer block comprises an inner core, an outer sleeve, a bushing main body and the buffer block; the inner core is wrapped by the bushing main body, and the outer sleeve is sleeved on the bushing main body; the buffer block is arranged at one end of the bushing main body and is in vulcanization connection with the bushing main body; the buffer block is also provided with a convex matching limiting block which is in limiting matching with the corresponding structure of the automobile.

Further, the buffer block comprises a buffer piece and a support piece wrapped by the buffer piece; the buffer piece is internally provided with a supporting space, and the supporting piece is arranged in the supporting space.

Further, the matched limiting block is arranged on the upper surface of the buffer piece, and auxiliary limiting grooves are formed in two sides of the matched limiting block; the automobile body is provided with a matched limiting groove corresponding to the matched limiting block and an auxiliary limiting block corresponding to the auxiliary limiting groove.

Further, protruding points are distributed on the upper surface of the buffer block.

Further, protruding reinforcing ribs are further distributed on the lower surface of the buffer piece, and the distances between adjacent reinforcing ribs are equal.

Further, the liner body includes an inner liner tube, an outer liner tube, and a joint; the buffer block is arranged at one end of the outer liner tube; the inner core is arranged in the inner assembly space and is wrapped by the inner lining pipe; the outer liner tube is provided with an outer assembly space, the inner liner tube is arranged in the outer assembly space, and the inner liner tube is connected with the outer liner tube through a joint part; the center point of the outer assembly space coincides with the center point of the inner assembly space on the same straight line.

Further, the device also comprises an intermediate plate wrapped by the joint part; the connecting part comprises an inner connecting piece, an outer connecting piece and a wrapping piece; a wrapping space is arranged in the wrapping piece, and the middle plate is arranged in the wrapping space; the inner connecting piece is connected with the wrapping piece and the lining pipe; the outer connecting piece is connected with the wrapping piece and the outer lining pipe; the height value of the middle plate and the wrapping piece is larger than that of the inner connecting piece and the outer connecting piece, and the upper end and the lower end of the middle plate and the wrapping piece exceed the inner connecting piece and the outer connecting piece; the setting direction of intermediate plate corresponds with the setting direction of interior bushing pipe, outer bushing pipe and linking portion.

Further, the engagement portion includes a first engagement portion and a second engagement portion; the first connecting part and the second connecting part are symmetrically connected with two sides of the inner lining pipe and are connected with the outer lining pipe; the inner connecting pieces of the first connecting part and the second connecting part comprise a first inner connecting piece and a second inner connecting piece, and a gap is arranged between the first inner connecting piece and the second inner connecting piece; the first inner connecting piece of the first connecting part and the first inner connecting piece of the second connecting part are symmetrical, and the second inner connecting piece of the first connecting part and the second inner connecting piece of the second connecting part are symmetrical.

Further, a balance weight is also arranged on the outer liner tube; the balance weight is positioned in the outer assembly space and is arranged between the first connecting part and the second connecting part.

Further, the jacket adopts a closed-loop structure and is sleeved on the bushing main body by adopting a diameter reduction process; the diameter of the buffer block is larger than that of the bushing main body, and the buffer block is in a region beyond the bushing main body; one end of the outer sleeve is provided with a contact part, the contact part is abutted with the area of the buffer block exceeding the bushing main body, so that the matching position of the outer sleeve and the bushing main body is limited, the contact surface of the outer sleeve and the bushing main body is increased, and the assembly stability is improved.

The beneficial effects of the utility model are as follows:

in the utility model, the buffer block is arranged at one end of the bushing main body, and the impact force and vibration received by the buffer block are relieved, so that the effect of integrally relieving the impact force and vibration is improved; still be provided with the cooperation stopper on the buffer block, through the cooperation of the corresponding position of cooperation stopper and car for the contact between buffer block and the automobile body is inseparabler, and when the vehicle appears big load change when traveling on the road section of rolling, the position of buffer block is injectd to the cooperation stopper, makes the automobile body can be faster stable, alleviates the impact that the automobile body received and feel.

In the utility model, the buffer block comprises the buffer piece and the support piece wrapped by the buffer piece, and the buffer block is provided with a certain strength through the arrangement of the support piece, so that the buffer block is prevented from being deformed when being subjected to impact force or acting force, and the capability of relieving the impact force or acting force is prevented from weakening.

In the utility model, auxiliary limit grooves are also arranged on two sides of the matched limit block, and the matched limit block and the auxiliary limit groove are matched with the vehicle body at the same time, so that a double limit effect is applied; the utility model can be matched with the vehicle body more stably and tightly.

In the utility model, the upper surface of the buffer block is also distributed with the convex points, and the convex points ensure the stable matching between the utility model and the vehicle body, and simultaneously reduce the joint surface between the utility model and the vehicle body and the noise generated by friction in the running process of the vehicle.

In the utility model, the lower surface of the buffer member is also provided with the protruding reinforcing ribs in a distributed manner, so that the surface strength of the vulcanized connection between the buffer member and the bushing main body is higher.

In the utility model, the center point of the outer assembly space and the center point of the inner assembly space are overlapped on the same straight line, so that the whole structure of the utility model is more uniform and the stability is better.

In the prior art, most of rubber parts of the auxiliary frame bushing adopt solid rubber structures, so that the rigidity of the auxiliary frame bushing in the X direction and the rigidity of the auxiliary frame bushing in the Y direction are the same, and the auxiliary frame bushing are required to be selected according to different requirements in the acceleration direction and the rotation direction; in the utility model, the middle plate wrapped by the connecting part is arranged, and the different rigidity requirements of the X direction and the Y direction are distinguished through the arrangement of the middle plate; the connecting part comprises an inner connecting piece, an outer connecting piece and a wrapping piece, the wrapping piece is positioned between the inner connecting piece and the outer connecting piece, the middle plate is positioned in a wrapping space of the wrapping piece, and the setting direction of the middle plate corresponds to the setting direction of the inner lining pipe, the outer lining pipe and the connecting part; when the joint part is subjected to acceleration and deceleration in the X direction, the strength of the middle plate is less influenced on the strength of the joint part, so that the acceleration and deceleration rigidity in the X direction is relatively small, and the riding comfort of the automobile is further improved; when the joint part is subjected to the action of Y steering left and right, the strength of the middle plate has larger influence on the strength of the joint part, so that the rigidity of Y steering left and right is relatively larger, and the operation stability of the automobile is further improved; thereby improving the situation that the traditional solid structure can not be simultaneously considered.

In the utility model, the inner connecting piece comprises the first inner connecting piece and the second inner connecting piece, so that when the connecting part is subjected to the action of Y steering left and right, the first inner connecting piece and the second inner connecting piece can deform according to the acting force to relieve a certain impact force, thereby ensuring the stability of the automobile operation and improving the comfort; and the clearance that sets up in linking piece in first and the second links up between the piece, can avoid appearing interfering in first in linking piece and the second.

In the utility model, the balance weight is arranged to ensure that the whole structure of the bushing main body is more uniform, the impact force and acting force relieving effect is improved, and the comfort of the vehicle with the utility model is better.

In the utility model, the jacket adopts a closed-loop structure, so that the structural strength of the jacket is higher; the bushing body is sleeved with the bushing body by adopting a diameter reducing process, and stress is released by the diameter reducing process, so that the durability is improved; and the contact part arranged on the outer sleeve is abutted with the area of the buffer block beyond the bushing main body, so that the matching position of the outer sleeve and the bushing main body is limited, the contact surface of the outer sleeve and the bushing main body is increased, and the assembly stability is improved.

Drawings

Fig. 1 is a structural view of the whole of the present utility model.

Fig. 2 is a cross-sectional view of the present utility model.

Fig. 3 is a structural view of the outer jacket.

Fig. 4 is a structural view of the core.

Fig. 5 is a structural view of the upper surface of the bumper.

Fig. 6 is a structural view of the lower surface of the bumper.

Fig. 7 is a cross-sectional view of the bumper engaged with the support.

Fig. 8 is a cross-sectional view of the cushioning member.

FIG. 9 is a top view of the end of the bushing body with the bumper block

Reference numerals in the drawings:

1. an inner core; 2. a jacket; 3. a bushing body; 4. a buffer block; 5. a limiting block is matched; 6. an auxiliary limit groove; 7. a bump; 8. reinforcing ribs; 21. a contact portion; 31. an inner liner tube; 32. an outer liner; 33. a joint portion; 34. an intermediate plate; 35. a first engagement portion; 36. a second engagement portion; 41. a buffer member; 42. a support; 43. a supporting space; 44. an opening; 311. an inner assembly space is arranged; 321. an outer assembly space; 322. a balance weight; 331. an inner engagement member; 332. an outer engagement member; 333. a wrapper; 334. a parcel space; 335. a first inner engagement member; 336. a second inner engagement member; 337. a gap.

Detailed Description

The utility model will be further described with reference to the drawings and specific examples. It should be noted that the examples are only specific to the present utility model and are for the purpose of better understanding of the technical solutions of the present utility model to those skilled in the art, and should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, as the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used for convenience of description and simplicity of description, only as to the orientation or positional relationship shown in the drawings, and not as an indication or suggestion that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model.

In the description of the present utility model, it should be noted that unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases to those skilled in the art.

Examples:

as shown in fig. 1-9, a novel auxiliary frame bushing with a buffer block comprises an inner core 1, an outer sleeve 2, a bushing main body 3 and the buffer block 4; the inner core 1 is wrapped by the bushing main body 3, and the outer sleeve 2 is sleeved on the bushing main body 3; the buffer block 4 is arranged at one end of the bushing main body 3 and is in vulcanization connection with the bushing main body 3; the buffer block 4 is also provided with a convex matched limiting block 5 which is in limiting fit with a corresponding structure of the automobile; in the utility model, the buffer block 4 is arranged at one end of the bushing main body 3, and the buffer block 4 is used for relieving the impact force and vibration received, so that the effect of relieving the impact force and vibration integrally is improved; still be provided with cooperation stopper 5 on buffer block 4, through the cooperation of cooperation stopper 5 and the corresponding position of car for the contact between buffer block 4 and the automobile body is inseparabler, and when the vehicle appears big load change when traveling on the wave highway section, cooperation stopper 5 prescribes a limit to the position of buffer block 4, makes the automobile body can be faster stable, alleviates the impact sense that the automobile body received.

In this embodiment, the buffer block 4 includes a buffer member 41 and a support member 42 wrapped by the buffer member 41; a supporting space 43 is arranged in the buffer member 41, and the supporting member 42 is arranged in the supporting space 43; the buffer block 4 is provided with a certain strength through the arrangement of the supporting piece 42, so that the reduction of the capability of relieving the impact force or acting force caused by deformation when the buffer block is subjected to the impact force or acting force is avoided.

An opening 44 is also provided in the cushion member 41 before the vulcanization connection with the liner main body 3, and the supporting space 43 is communicated with the outside through the opening 44; the provision of the opening 44 can prevent the support member 42 from remaining redundant air in the support space 43 after being disposed in the support space 43, which results in insufficient adhesion between the support member 42 and the cushioning member 41, and thus a reduced capability of relieving impact or force to the cushioning block 4.

In this embodiment, the engaging limiting block 5 is disposed on the upper surface of the buffer member 41, and auxiliary limiting grooves 6 are disposed on two sides of the engaging limiting block 5; a matching limit groove corresponding to the matching limit block 5 and an auxiliary limit block corresponding to the auxiliary limit groove 6 are arranged on the vehicle body; in the present utility model, the lower surface of the buffer block 4 is vulcanized with the bushing body 3, so that the matching stopper 5 is disposed on the upper surface of the buffer member 41; the auxiliary limiting groove 6 is matched with the vehicle body through the matched limiting block 5, so that a double limiting effect is exerted; the utility model can be matched with the vehicle body more stably and tightly.

In this embodiment, the engaging limiting block 5 and the auxiliary limiting groove 6 and the engaging limiting groove and the auxiliary limiting block on the vehicle body are triangular, so that the engaging between the present utility model and the vehicle body is more stable by the principle of high triangle stability.

In the embodiment, the bumps 7 are further distributed on the upper surface of the buffer block 4, and by the arrangement of the bumps 7, the joint surface between the buffer block and the vehicle body is reduced while the stable matching between the buffer block and the vehicle body is ensured, and the noise generated by friction in the running process of the vehicle is reduced.

It should be noted that the number of the bumps 7 and the distribution of the bumps 7 may be set according to the actual requirements.

In this embodiment, protruding reinforcing ribs 8 are further distributed on the lower surface of the buffer 41, and the intervals between adjacent reinforcing ribs 8 are equal; the surface strength of the vulcanized connection of the buffer 41 and the bushing body 3 is made higher by the reinforcing ribs 8.

In some preferred ways, grooves matched with the reinforcing ribs 8 are further arranged on the surface of the liner main body 3 in vulcanization connection with the buffer 41, so that the buffer 41 is matched with the liner main body 3 more stably.

In the present embodiment, the liner body 3 includes a liner tube 31, an outer liner tube 32, and a joint 33; the buffer block 4 is arranged at one end of the outer liner tube 32; the lining pipe 31 is provided with an inner assembly space 311, and the inner core 1 is arranged in the inner assembly space 311 and is wrapped by the lining pipe 31; the outer liner tube 32 is provided with an outer fitting space 321, the inner liner tube 31 is provided in the outer fitting space 321, and the inner liner tube 31 and the outer liner tube 32 are connected by a joint 33; the center point of the outer assembly space 321 and the center point of the inner assembly space 311 are overlapped on the same straight line, so that the whole structure of the utility model is more uniform and the stability is better.

In this embodiment, an intermediate plate 34 is further included, which is wrapped by the engagement portion 33; the engagement portion 33 includes an inner engagement member 331, an outer engagement member 332, and a wrapping member 333; a wrapping space 334 is arranged in the wrapping member 333, and the intermediate plate 34 is arranged in the wrapping space 334; the inner joint member 331 is connected to the wrapping member 333 and the liner tube 31; the outer connector 332 is connected to the wrapper 333 and the outer liner 32; the height value of the intermediate plate 34 and the packing 333 is greater than that of the inner and outer engaging pieces 331 and 332, and the intermediate plate 34 and the packing 333 are protruded beyond the inner and outer engaging pieces 331 and 332 at both upper and lower ends; the setting direction of the intermediate plate 34 corresponds to the setting direction of the inner lining pipe 31, the outer lining pipe 32 and the joint portion 33; in the prior art, most of rubber parts of the auxiliary frame bushing adopt solid rubber structures, so that the rigidity of the auxiliary frame bushing in the X direction and the rigidity of the auxiliary frame bushing in the Y direction are the same, and the auxiliary frame bushing are required to be selected according to different requirements in the acceleration direction and the rotation direction; in the utility model, the middle plate 34 wrapped by the joint part 33 is arranged, and the different rigidity requirements of the X direction and the Y direction are distinguished through the arrangement of the middle plate 34; the packing 333 is located between the inner joint 331 and the outer joint 332, and the intermediate plate 34 is located in the packing space 334 of the packing 333, and the arrangement direction of the intermediate plate 34 corresponds to the arrangement direction of the inner liner 31, the outer liner 32, and the joint 33; when the joint part 33 is subjected to acceleration and deceleration in the X direction, the strength of the middle plate 34 has small influence on the strength of the joint part 33, so that the acceleration and deceleration rigidity in the X direction is relatively small, and the riding comfort of an automobile is further improved; when the joint part 33 is subjected to the action of Y steering left and right, the strength of the middle plate 34 has a larger influence on the strength of the joint part 33, so that the rigidity of Y steering left and right is relatively higher, and the operation stability of the automobile is further improved; thereby improving the situation that the traditional solid structure can not be simultaneously considered.

In this embodiment, the engagement portion 33 includes a first engagement portion 35 and a second engagement portion 36; the first joint part 35 and the second joint part 36 are symmetrically connected with both sides of the inner lining pipe 31 and are connected with the outer lining pipe 32; the inner engaging pieces 331 of the first engaging portion 35 and the second engaging portion 36 each include a first inner engaging piece 335 and a second inner engaging piece 336, and a gap 337 is provided between the first inner engaging piece 335 and the second inner engaging piece 336; the first inner engaging piece 335 of the first engaging portion 35 and the first inner engaging piece 335 of the second engaging portion 36 are symmetrical to each other, and the second inner engaging piece 336 of the first engaging portion 35 and the second inner engaging piece 336 of the second engaging portion 36 are symmetrical to each other, so that the whole bushing main body 3 is more uniform, and the impact feeling of the vehicle body can be relieved more stably; in the present utility model, the inner engaging member 331 includes a first inner engaging member 335 and a second inner engaging member 336, so that when the engaging portion 33 is subjected to the action of Y steering left and right, both the first inner engaging member 335 and the second inner engaging member 336 can deform according to the applied force to relieve a certain impact force, thereby improving comfort while ensuring the stability of the operation of the automobile; and the gap 337 provided between the first inner engagement member 335 and the second inner engagement member 336 can prevent interference between the first inner engagement member 335 and the second inner engagement member 336.

In this embodiment, a weight 322 is also provided on the outer liner 32; the balance weight 322 is located in the outer assembly space 321 and is disposed between the first engagement portion 35 and the second engagement portion 36; the balance weight 322 makes the whole structure of the bushing main body 3 more uniform, improves the effect of relieving impact force and acting force, and makes the vehicle with the utility model more comfortable.

In this embodiment, the outer sleeve 2 adopts a closed-loop structure, so that the structural strength of the outer sleeve is higher; the jacket 2 is sleeved on the bushing main body 3 by adopting a diameter reduction process, and stress is released by the diameter reduction process, so that the durability is improved; the diameter of the buffer block 4 is larger than that of the bushing main body 3, and the buffer block 4 is arranged in a region beyond the bushing main body 3; one end of the outer sleeve 2 is provided with a contact part 21, the contact part 21 is abutted with the buffer block 4 beyond the area of the bushing main body 3, so that the matching position of the outer sleeve 2 and the bushing main body 3 is limited, the matching contact surface of the outer sleeve 2 and the bushing main body 3 is increased, and the assembly stability is improved.

It should be noted that other technical solutions of the present utility model belong to the prior art, and are not described in detail.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the concept of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.

Claims

1. The novel auxiliary frame bushing with the buffer block is characterized by comprising an inner core, an outer sleeve, a bushing main body and the buffer block; the inner core is wrapped by the bushing main body, and the outer sleeve is sleeved on the bushing main body; the buffer block is arranged at one end of the bushing main body and is in vulcanization connection with the bushing main body; the buffer block is also provided with a convex matching limiting block which is in limiting matching with the corresponding structure of the automobile.

2. The novel subframe bushing with buffer of claim 1, wherein said buffer comprises a buffer and a support wrapped by the buffer; the buffer piece is internally provided with a supporting space, and the supporting piece is arranged in the supporting space.

3. The novel auxiliary frame bushing with the buffer block according to claim 2, wherein the matched limiting block is arranged on the upper surface of the buffer piece, and auxiliary limiting grooves are formed in two sides of the matched limiting block; the automobile body is provided with a matched limiting groove corresponding to the matched limiting block and an auxiliary limiting block corresponding to the auxiliary limiting groove.

4. The novel subframe bushing with the buffer block according to claim 3, wherein the bumps are further distributed on the upper surface of the buffer block.

5. The novel subframe bushing with a buffer block as claimed in claim 4, wherein the protruding reinforcing ribs are further distributed on the lower surface of the buffer member, and the distances between the adjacent reinforcing ribs are equal.

6. The cushioned novel subframe bushing of claim 5 wherein said bushing body includes an inner bushing tube, an outer bushing tube and a joint; the buffer block is arranged at one end of the outer liner tube; the inner core is arranged in the inner assembly space and is wrapped by the inner lining pipe; the outer liner tube is provided with an outer assembly space, the inner liner tube is arranged in the outer assembly space, and the inner liner tube is connected with the outer liner tube through a joint part; the center point of the outer assembly space coincides with the center point of the inner assembly space on the same straight line.

7. The novel subframe bushing with cushion block according to claim 6, further comprising an intermediate plate wrapped by the engagement portion; the connecting part comprises an inner connecting piece, an outer connecting piece and a wrapping piece; a wrapping space is arranged in the wrapping piece, and the middle plate is arranged in the wrapping space; the inner connecting piece is connected with the wrapping piece and the lining pipe; the outer connecting piece is connected with the wrapping piece and the outer lining pipe; the height value of the middle plate and the wrapping piece is larger than that of the inner connecting piece and the outer connecting piece, and the upper end and the lower end of the middle plate and the wrapping piece exceed the inner connecting piece and the outer connecting piece; the setting direction of intermediate plate corresponds with the setting direction of interior bushing pipe, outer bushing pipe and linking portion.

8. The novel subframe bushing with a buffer of claim 7, wherein said engagement portion comprises a first engagement portion and a second engagement portion; the first connecting part and the second connecting part are symmetrically connected with two sides of the inner lining pipe and are connected with the outer lining pipe; the inner connecting pieces of the first connecting part and the second connecting part comprise a first inner connecting piece and a second inner connecting piece, and a gap is arranged between the first inner connecting piece and the second inner connecting piece; the first inner connecting piece of the first connecting part and the first inner connecting piece of the second connecting part are symmetrical, and the second inner connecting piece of the first connecting part and the second inner connecting piece of the second connecting part are symmetrical.

9. The novel subframe bushing with buffer block of claim 8, wherein a counterweight is further arranged on the outer liner tube; the balance weight is positioned in the outer assembly space and is arranged between the first connecting part and the second connecting part.

10. The novel auxiliary frame bushing with the buffer block according to claim 9, wherein the outer sleeve adopts a closed-loop structure and is sleeved on the bushing main body by adopting a diameter reduction process; the diameter of the buffer block is larger than that of the bushing main body, and the buffer block is in a region beyond the bushing main body; one end of the outer sleeve is provided with a contact part, and the contact part is abutted with the area of the buffer block exceeding the bushing main body.