Bushing assembly and vehicle

Abstract

The utility model relates to the field of vehicles, aims to solve the problem that in the prior art, bushings need to be designed for different preloading requirements, and the development cost is high, and provides a bushing assembly and a vehicle. The lining assembly comprises an outer pipe, an elastic body, an inner pipe, a limiting plate and a gap adjusting piece. The elastic body is connected between the inner pipe and the outer pipe. The limiting plate is connected to the inner pipe. The gap adjusting piece comprises an adjusting plate part, and the adjusting plate part is supported on the limiting plate. The adjusting plate part and the outer pipe are opposite in the axial direction at intervals so as to define an interval space. The gap adjusting piece is detachably arranged between the limiting plate and the outer pipe. The lining assembly has the beneficial effects that the universality of the lining assembly is high, and the platformization rate can be increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicles, in particular, to a bushing assembly and a vehicle. BACKGROUND

[0002] The bushing is a commonly used damping member in vehicles, which can damp the relative movement between two connected components, and can reduce vibration and noise.

[0003] However, in the known technology, different structures or sizes of bushings often need to be separately provided to adapt to different preloads. For example, in different vehicle models in the same platform, the preload applied to the bushing may be different. At this time, designing the bushing for different vehicle models respectively may increase the development cost and is not conducive to improving the platformization rate. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a bushing assembly and a vehicle to solve the problem of high development cost in the known technology due to the need to design different bushings for different preload requirements.

[0005] In a first aspect, the present application provides a bushing assembly, which comprises an outer tube, an elastic body, an inner tube, a limiting plate and a gap adjusting member. The elastic body is connected between the inner tube and the outer tube. The limiting plate is connected to the inner tube. The gap adjusting member comprises an adjusting plate portion supported on the limiting plate; the adjusting plate portion and the outer tube are spaced apart in the axial direction to define a spacing space. The gap adjusting member is detachably arranged between the limiting plate and the outer tube.

[0006] The bushing assembly in the present application can be installed in a vehicle or other equipment. When assembled, the weight load of the vehicle body or other components is pre-pressed on the outer tube, which will cause the outer tube to displace in the axial direction towards the adjusting plate portion, which will reduce the distance between the outer tube and the adjusting plate portion (i.e. the distance of the spacing space in the axial direction).

[0007] When the bushing assembly is used for different vehicle models or installed at different positions of the same vehicle model, the preload applied to the outer tube may be different, which will cause the above-mentioned distance to be different. For example, when the preload is larger, the displacement of the outer tube is larger, and the above-mentioned distance is smaller; on the contrary, when the preload is smaller, the displacement of the outer tube is smaller, and the above-mentioned distance is larger.

[0008] In the present application, the gap adjusting member is detachably arranged between the limiting plate and the outer tube, and the gap adjusting member with different thicknesses of the adjusting plate portion can be replaced to adjust the above-mentioned distance, so as to ensure that the above-mentioned distance is within the allowable range, thereby adapting to different vehicle models.

[0009] For example, when the above-mentioned distance is too small, a gap adjusting member with a thinner adjusting plate portion can be used to increase the above-mentioned distance; when the above-mentioned distance is too large, a gap adjusting member with a thicker adjusting plate portion can be used to reduce the distance.

[0010] In one possible implementation, the elastic body is provided with a matching hole extending in the axial direction. The gap adjusting member further comprises a matching column connected to the adjusting plate portion and movably matched to the matching hole in the axial direction.

[0011] In one possible implementation, the matching hole is provided with a plurality of matching holes spaced apart along the circumferential direction of the elastic member. The matching column is provided with a plurality of matching columns respectively matched to the plurality of matching holes. The matching hole is provided with a first contact surface, and the matching column is provided with a second contact surface, the first contact surface and the second contact surface forming a contact matching capable of moving in the axial direction.

[0012] In one possible implementation, the inner tube is provided with a connecting end extending out of the outer tube in the axial direction, and the connecting end is provided with a matching groove. The adjusting plate portion is matched to the matching groove, and the plate surface of the adjusting plate portion away from the outer tube is flush with the end surface of the connecting end.

[0013] In one possible implementation, the middle position of the groove bottom surface of the matching groove is provided with a positioning boss. The adjusting plate portion comprises a middle portion and two extending portions connected to the two sides of the middle portion respectively, and the two extending portions are spaced apart relative to the outer tube in the axial direction. The two matching columns are connected to the two extending portions respectively. The middle portion is provided with a positioning hole, the positioning hole is sleeved and matched to the outside of the positioning boss, and the middle portion is annular around the positioning boss, and the part of the middle portion around the positioning boss is abutted to the groove bottom surface of the matching groove.

[0014] In one possible implementation, the limiting plate comprises a plate body and a connecting portion. The end surface of the connecting end of the inner tube, and the middle portion and the two extending portions of the adjusting plate portion; the connecting portion is bent and connected to the plate body, and connected to the inner tube.

[0015] In one possible implementation, the outer tube comprises a tube body and a first tube edge connected to the tube body and protruding radially from the tube body at an end close to the limiting plate in the axial direction. The adjusting plate portion extends radially outward and corresponds to the first tube edge in the axial direction to define a spacing space.

[0016] In one possible implementation, the outer tube further comprises a second tube edge connected to the tube body and protruding radially from the tube body at an end close to the limiting plate in the axial direction, and the second tube edge and the first tube edge are connected in the circumferential direction. The region of the adjusting plate portion and the limiting plate corresponding to the second tube edge in the axial direction is cut off.

[0017] In one possible implementation, there are a plurality of gap adjusting members. The thicknesses of the adjusting plate portions of the various gap adjusting members are different, so that switching different gap adjusting members can adjust the height of the spacing space.

[0018] In one possible implementation, the elastic body comprises a buffer protruding edge extending radially outward to cover the surface of the outer tube facing the adjusting plate portion.

[0019] In a second aspect, the present application provides a vehicle comprising the bushing assembly as described above. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 It is a structural schematic diagram of the vehicle of an embodiment of the present application.

[0022] Figure 2 It is a perspective view of the bushing assembly of an embodiment of the present application.

[0023] Figure 3 It is an exploded view of the bushing assembly of Figure 2 .

[0024] Figure 4 It is a top view of the bushing assembly of an embodiment of the present application.

[0025] Figure 5 It is a sectional view of the bushing assembly of Figure 4 along the line A-A.

[0026] Figure 6 It is a perspective view of the bushing assembly of Figure 2 from another angle.

[0027] Figure 7 It is an exploded view of the bushing assembly of Figure 6 .

[0028] Figure 8 It is a sectional view of the bushing assembly of Figure 4 along the line B-B.

[0029] Main element symbol explanation: 100-vehicle; 110-first component; 120-second component; 130-bushing assembly; 10-outer tube; 11-tube body; 12-first tube edge; 13-second tube edge; 20-elastic body; 21-buffering protruding edge; 30-inner tube; 31-connection end; 32-positioning boss; 40-gap adjusting member; 41-adjusting plate part; 41a-middle part; 41b-protruding part; 42-matching column; 50-limiting plate; 51-plate body; 52-connection part; Z-axial direction; f1-interval space; P1-first contact surface; P2-second contact surface; P3-end surface; K1-matching hole; K2-positioning hole; K3-center hole; C1-groove; C2-matching groove; C3-connection groove. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0031] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. When an element is referred to as being "disposed" on another element, it can be directly disposed on the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0033] Some embodiments of the present application are described in detail. The following embodiments and features of the embodiments can be combined with each other without conflict.

[0034] Embodiments

[0035] Figure 1 A vehicle 100 is shown in an embodiment of the present application.

[0036] The vehicle 100 can be, for example, a fuel vehicle (such as a gasoline vehicle, a diesel vehicle, etc.), an electric vehicle (such as a pure electric vehicle, a fuel cell vehicle), or a hybrid electric vehicle.

[0037] Some components of the vehicle 100 are provided with a bushing to achieve the functions of buffering, vibration reduction, noise reduction, etc., and to improve the comfort, safety, etc.

[0038] For example, Figure 1 The vehicle 100 in the embodiment has a first component 110, a second component 120, and a bushing assembly 130. The second component 120 is mounted to the first component 110 through the bushing assembly 130. The first component 110 and the second component 120 can be two components of a rear subframe of the vehicle 100, or can be other components. For example, the first component 110 can be a subframe, and the second component 120 can be a control arm, which are connected through the bushing 130 to achieve a transmission function with a buffering effect.

[0039] In some cases, a vehicle production platform can need to produce multiple vehicle models 100, and the positions and weights of the various vehicle models 100 are different, and the different weights result in different loads on the front and rear axles, which can result in different preloads of the rear subframe bushings of each vehicle model 100. After the vehicle 100 is produced and placed on the ground, the outer tube of the bushing will move downward under the influence of the preload. The greater the preload, the greater the displacement. The preload and the axial stiffness of the bushing are linearly related, and the vehicle posture is inconsistent under different preloads and different axial stiffnesses.

[0040] In related technologies, bushings that need to bear different preloads usually need to be designed separately, which has poor universality and is not conducive to improving the platform rate.

[0041] Therefore, the embodiments provide a bushing assembly 130 that can meet the requirements of different preloads of different vehicle models, thereby improving the universality and platform rate of the bushing assembly 130. The following will be exemplarily introduced.

[0042] Referring to Figure 2 and Figure 3 , the bushing assembly 130 in the embodiments includes an outer tube 10, an elastic body 20, an inner tube 30, a gap adjusting member 40, and a limiting plate 50.

[0043] The elastic body 20 is connected between the inner tube 30 and the outer tube 10. For example, the outer tube 10, the elastic body 20, and the inner tube 30 are combined together through a vulcanization process.

[0044] In some embodiments, the elastic body 20 can be made of rubber. In other embodiments, the elastic body 20 can also be made of polyurethane or other materials that can provide elastic buffering, which is not limited here.

[0045] In use, the inner tube 30 can be relatively fixed with the first member 110 (see Figure 1 ), and the outer tube 10 can be relatively fixed with the second member 120 (see Figure 1 ). In this way, the load from the second member 120 can be transmitted to the inner tube 30 and the first member 110 through the outer tube 10 and the elastic body 20. Through the buffering effect of the elastic body 20, buffering can be provided between the second member 120 and the first member 110, which is conducive to reducing the vibration and noise transmitted to the first member 110.

[0046] For reference, see Figure 4 and Figure 5In the embodiment, the limiting plate 50 is connected to the inner tube 30 and is used to be connected to the first component 110 in cooperation. The gap adjusting member 40 comprises an adjusting plate part 41 which is supported on the limiting plate 50, and the adjusting plate part 41 and the outer tube 10 are spaced apart in the axial direction Z to define a spacing space f1. The gap adjusting member 40 is detachably arranged between the limiting plate 50 and the outer tube 10.

[0047] When the bushing assembly 130 of the embodiment is assembled in the vehicle 100, the weight load of the second component 120 (see Figure 1 ) of the vehicle 100 is preloaded on the outer tube 10, which will cause the outer tube 10 to be displaced in the axial direction Z towards the adjusting plate part 41, which will reduce the distance H between the outer tube 10 and the adjusting plate part 41 (i.e. the height of the spacing space f1 in the axial direction Z).

[0048] When the bushing assembly 130 is used for different vehicle models or is installed at different positions of the same vehicle model, the preloading applied to the outer tube 10 can be different, which will cause the above-mentioned distance H to be different. For example, when the preloading is larger, the displacement of the outer tube 10 is larger, and thus the above-mentioned distance H is smaller; conversely, when the preloading is smaller, the displacement of the outer tube 10 is smaller, and thus the above-mentioned distance H is larger.

[0049] In the embodiment, the limiting plate 50 and the inner tube 30 are relatively fixed, and the distance H between the limiting plate 50 and the outer tube 10 is a certain value under the same preloading. The gap adjusting member 40 is detachably arranged between the limiting plate 50 and the outer tube 10, and the gap adjusting member 40 with the adjusting plate part 41 having different thicknesses T can be replaced to adjust the above-mentioned distance H, so as to ensure that the above-mentioned distance H is within the allowable range.

[0050] For example, the bushing assembly of the embodiment provides a plurality of gap adjusting members 40, and the key difference between different gap adjusting members 40 is that the thickness T of the adjusting plate part 41 is different.

[0051] When the above-mentioned distance H is too small, the gap adjusting member 40 with the adjusting plate part 41 having a smaller thickness T can be selected to increase the above-mentioned distance H; when the above-mentioned distance H is too large, the gap adjusting member 40 with the adjusting plate part 41 having a larger thickness T can be selected to reduce the distance H.

[0052] Therefore, the bushing assembly 130 in the embodiment can be conveniently adapted to different vehicle models or different positions of the same vehicle model, which is beneficial to ensure the distance between the outer tube 10 and the adjusting plate part 41 after the preloading is applied, and thus to ensure that the buffering distance of the bushing assembly 130 is within the allowable range.

[0053] In comparison, the cushioning distance of some related art bushings can exceed the allowable range (e.g. too large or too small) under different preloads, which is not conducive to the normal cushioning function of the bushing in use of the vehicle 100. For example, when the cushioning distance is too small, the elastomer 20 is compressed to a small extent and the bushing will then rigidly collide; when the cushioning distance is too large, the bushing allows the first member 110 and the second member 120 to have an excessive relative displacement, which can cause the second member 120 to mechanically interfere with the surrounding members and other adverse consequences.

[0054] Referring again to Figure 4 and Figure 5 , in this embodiment, the elastomer 20 is provided with a matching hole K1 extending along the axial direction Z, and the gap adjusting member 40 further comprises a matching column 42. The matching column 42 is connected perpendicularly to one side surface of the adjusting plate portion 41 and movably matches the matching hole K1 along the axial direction Z. Optionally, there are multiple matching holes K1, and the multiple matching holes K1 are distributed at intervals along the circumferential direction. Correspondingly, there are multiple matching columns 42, and the multiple matching columns 42 respectively match the multiple matching holes K1. For example, as shown in the figure, the matching hole K1 and the matching column 42 are two and symmetrically distributed. The matching hole K1 has a first contact surface P1, and the matching column 42 has a second contact surface P2, and the first contact surface P1 and the second contact surface P2 form a contact matching capable of moving relative to each other along the axial direction Z. For example, as shown in the figure, the first contact surface P1 is the radially inner surface of the matching hole K1, and the second contact surface P2 is the radially inner surface of the matching column 42, so that the two matching columns 42 are movably symmetrically clamped in the middle structure (including the inner tube 30 and part of the elastomer 20) of the bushing assembly 130, which is conducive to guiding the outer tube 10 and the elastomer 20 to move along the axial direction Z without being easily deflected when an external force acts.

[0055] Optionally, the side surface of the adjusting plate portion 41 close to the limiting plate 50 is provided with a recessed groove C1. These grooves C1 can reduce the weight of the gap adjusting member 40, which is conducive to reducing the total weight of the bushing assembly 130.

[0056] Referring to Figure 6 and Figure 7 , the inner tube 30 has a connecting end 31 extending out of the outer tube 10 along the axial direction Z, and the end surface P3 of the connecting end 31 is recessed to form a matching groove C2. For example Figure 6 , the matching groove C2 is substantially rectangular, and the matching groove C2 extends along the radial direction of the inner tube 30 and penetrates through the two side surfaces of the connecting end 31. The middle position of the groove bottom surface of the matching groove C2 is provided with a positioning boss 32.

[0057] The adjusting plate part 41 comprises a middle part 41a and two extending parts 41b connected to two sides of the middle part 41a respectively, and the two extending parts 41b and the outer tube 10 are spaced apart along the axial direction Z. Two matching columns 42 are connected to the two extending parts 41b respectively. The middle part 41a of the adjusting plate part 41 is provided with a positioning hole K2, the middle part 41a of the adjusting plate part 41 is matched in the matching groove C2, and the positioning hole K2 is sleeved and matched outside the positioning boss 32. The extending parts 41b of the adjusting plate part 41 respectively extend out of the matching groove C2 and extend outward along the radial direction to the outer edge part corresponding to the outer tube 10 and the elastic body 20. Optionally, in the embodiment, the middle part 41a is annular around the positioning boss 32, and the part of the middle part 41a around the positioning boss 32 abuts against the groove bottom surface of the matching groove C2. That is, in the embodiment, the positioning boss 32 is located on the inner side of the matching groove C2, and the outer peripheral contour of the positioning boss 32 is spaced apart from the outer peripheral contour of the matching groove C2, so that the groove bottom surface of the matching groove C2 is an annular surface. Correspondingly, the middle part 41a of the adjusting plate part 41 is an annular entity, and the middle part 41a can abut against and support the groove bottom surface of the matching groove C2 around the entity, so that the two are in contact around each other, have a large contact area, and the force transmission is uniform in all directions. In addition, the annular middle part 41a has high structural strength and is not easy to damage. Optionally, in the embodiment, the positioning hole K2 and the positioning boss 32 are chamfered or rounded at each angular position of the projection shape perpendicular to the axial direction Z, so as to ensure that the two are reliably positioned and limited in the circumferential direction, and the stress concentration when the positioning boss 32 and the middle part 41a transmit force can be reduced through chamfering or rounding.

[0058] In the embodiment, optionally, the plate surface of the adjusting plate part 41 away from the outer tube 10 is flush with the end surface P3 of the connecting end 31, so that the connecting end 31 of the inner tube 30 and the adjusting plate part 41 can be flatly overlapped on the limiting plate 50.

[0059] Continuing to refer to Figure 6 and Figure 7 In the embodiment, the limiting plate 50 comprises a plate body 51 and a connecting part 52. The plate body 51 is overlapped on the end surface P3 of the connecting end 31 of the inner tube 30 and the middle part 41a and the two extending parts 41b of the adjusting plate part 41. In this way, the plate body 51 and the extending direction of the adjusting plate part 41 are consistent, and the two have a larger overlapping area, which ensures the transmission of force between the two. The connecting part 52 is bent and connected to the plate body 51 and connected with the inner tube 30.

[0060] Optionally, the inner tube 30 has a central hole K3, which is recessed inwardly from the hole face of one end of the limiting plate 50 to form a connecting groove C3. The connecting portion 52 is fitted into the connecting groove C3. The number of connecting portions 52 of the limiting plate 50 and the number of connecting grooves C3 at the central hole K3 can both be two or more, for example, two as shown in the figure. The fitting relationship between the connecting portion 52 and the connecting groove C3 can also be seen from Figure 8 .

[0061] In this embodiment, when the bushing assembly 130 is assembled, the inner tube 30, the elastic body 20 and the outer tube 10 are vulcanized to form an integral piece, and then the gap adjusting member 40 and the limiting plate 50 are installed in sequence.

[0062] When the gap adjusting member 40 is installed, the gap adjusting member 40 is inserted along the axial direction Z, so that the fitting column 42 of the gap adjusting member 40 is fitted into the fitting hole K1, and the middle portion 41a of the adjusting plate portion 41 is fitted into the fitting groove C2, and the positioning hole K2 is sleeved outside the positioning boss 32. In this way, the positioning and fitting of the gap adjusting member 40 and the inner tube 30 can be completed.

[0063] Then the limiting plate 50 is installed. The plate body 51 of the limiting plate 50 is overlapped on the adjusting plate portion 41, and the two connecting portions 52 extend into the central hole K3 of the inner tube 30 and are fitted into the connecting grooves C3 at the central hole K3.

[0064] In this embodiment, the fitting between the gap adjusting member 40 and the inner tube 30 is detachable fitting, for example, the fitting between the gap adjusting member 40 and the inner tube 30 is clearance fitting, transition fitting or relatively loose interference fitting. The connecting portion 52 of the limiting plate 50 and the inner tube 30 can be connected more tightly, but can still be detached.

[0065] In this way, when the gap adjusting member 40 needs to be replaced, the limiting plate 50 can be removed, another gap adjusting member 40 is replaced, and then the limiting plate 50 is reinstalled, so that the gap adjusting member 40 and the limiting plate 50 are relatively fixed with the inner tube 30.

[0066] Again referring to Figure 6 and Figure 7In the embodiment, the outer tube 10 comprises a tube body 11 and a first tube flange 12 connected to the tube body 11 at an end close to the limiting plate 50 along the axial direction Z and protruding radially out of the tube body 11. The adjusting plate portion 41 extends radially outwards and is spaced from the first tube flange 12 along the axial direction Z to define a spacing f1. Optionally, the outer tube 10 further comprises a second tube flange 13 connected to the tube body 11 at an end close to the limiting plate 50 along the axial direction Z and protruding radially out of the tube body 11, and the second tube flange 13 and the first tube flange 12 are connected along the circumferential direction. The region of the adjusting plate portion 41 and the limiting plate 50 corresponding to the second tube flange 13 is cut away along the axial direction Z to avoid hindering the movement of the outer tube 10. In the embodiment, the first tube flange 12 and the second tube flange 13 are two respectively, and the two first tube flanges 12 and the two second tube flanges 13 are arranged alternately along the circumferential direction (see also Figure 4 ).

[0067] In some embodiments, the elastomer 20 further comprises a buffer flange 21 extending radially outwards to cover the surface of the outer tube 10 towards the adjusting plate portion 41, in addition to the portion clamped between the inner tube 30 and the outer tube 10. In this way, when the bushing assembly 130 is compressed, the buffer flange 21 of the elastomer 20 can provide a buffer between the adjusting plate portion 41 and the first tube flange 12, reducing the damage and noise caused by the collision. It should be noted that in these embodiments with the buffer flange 21, the thickness of the buffer flange 21 reduces the spacing between the adjusting plate portion 41 and the first tube flange 12 of the inner tube 30, so when adjusting the spacing, the impact of the buffer flange 21 on the spacing needs to be considered. Relatively speaking, for embodiments without the buffer flange 21, the impact of the buffer flange 21 does not need to be considered.

[0068] In summary, the bushing assembly 130 of the embodiment can replace the gap adjusting piece 40 with different thicknesses of adjusting plate portions 41 according to different preloads, so that the spacing between the outer tube 10 and the adjusting plate portion 41 is adjustable, meeting the needs of different preloads on the bushing for different vehicle models or different positions of the same vehicle model, having better universality, achieving a higher platformization rate, and shortening the sample development cycle.

[0069] In addition, the gap adjusting piece 40 of the embodiment is easy to disassemble and can be reused, which is beneficial to the vehicle evaluation.

[0070] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit it. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application.

Claims

1. A bushing assembly characterized by, The bushing assembly comprises: an outer tube, an elastic body and an inner tube, the elastic body being connected between the inner tube and the outer tube; a limiting plate connected to the inner tube; and a gap adjusting member, the gap adjusting member comprising an adjusting plate portion supported on the limiting plate, the adjusting plate portion and the outer tube being spaced apart in the axial direction to define a spacing space; wherein the gap adjusting member is detachably arranged between the limiting plate and the outer tube.

2. The bushing assembly according to claim 1, wherein: the elastic body is provided with a fitting hole extending in the axial direction; the gap adjusting member further comprises a fitting column connected to the adjusting plate portion and movably fitted in the fitting hole in the axial direction.

3. The bushing assembly according to claim 2, wherein: the fitting hole is provided with a plurality of fitting holes spaced apart in the circumferential direction of the elastic body; the fitting column is provided with a plurality of fitting columns respectively fitted in the plurality of fitting holes; the fitting hole is provided with a first contact surface, and the fitting column is provided with a second contact surface, the first contact surface and the second contact surface being in contact and movable relative to each other in the axial direction.

4. The bushing assembly according to claim 2, wherein: the inner tube is provided with a connecting end extending out of the outer tube in the axial direction, the connecting end being provided with a fitting groove; the adjusting plate portion is fitted in the fitting groove, and a plate surface of the adjusting plate portion away from the outer tube is flush with an end surface of the connecting end.

5. The bushing assembly according to claim 4, wherein: a positioning boss is provided at a middle position of a groove bottom surface of the fitting groove; the adjusting plate portion comprises a middle portion and two extending portions, the two extending portions being respectively connected to two sides of the middle portion, the two extending portions and the outer tube being spaced apart in the axial direction, and the two fitting columns being respectively connected to the two extending portions; the middle portion is provided with a positioning hole, the positioning hole being fitted around the positioning boss, and the middle portion being annular around the positioning boss, portions of the middle portion around the positioning boss being abutted against the groove bottom surface of the fitting groove.

6. The bushing assembly according to claim 5, wherein: the limiting plate comprises a plate body and a connecting portion; the plate body is superimposed on the end surface of the connecting end of the inner tube and the middle portion and the two extending portions of the adjusting plate portion, the connecting portion being bent and connected to the plate body and the inner tube.

7. The bushing assembly according to claim 1, wherein: the outer tube comprises a tube body and a first tube flange, the first tube flange being connected to one end of the tube body close to the limiting plate in the axial direction and protruding radially out of the tube body; the adjusting plate portion protrudes radially outwards and corresponds to the first tube flange in the axial direction to define the spacing space.

8. The bushing assembly according to claim 7, wherein: the outer tube further comprises a second tube flange, the second tube flange being connected to one end of the tube body close to the limiting plate in the axial direction and protruding radially out of the tube body, and the second tube flange and the first tube flange being connected in the circumferential direction. The adjusting plate portion and the limiting plate are cut in the region corresponding to the second tube along the axial direction.

9. The bushing assembly of any of claims 1-8, wherein: The gap adjuster has multiple types; The thickness of the adjusting plate portion of each type of the gap adjuster is different, so that switching between different types of the gap adjuster can adjust the height of the spacing space; And / or, The elastic body includes a cushioning protrusion extending radially outward to cover the surface of the outer tube facing the adjusting plate portion.

10. A vehicle characterized by comprising: Including: The bushing assembly of any of claims 1-9.

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