Air spring structure and suspension system

Abstract

The utility model relates to an air spring structure and a suspension system, the air spring structure comprises an air spring body and a guide structure, the air spring body is internally provided with an air storage cavity; the guide structure comprises a guide part and a movable part, the movable part is located in the air storage cavity, one end of the movable part is connected with the air spring body, the other end of the movable part is connected with the guide part in a telescopic mode, and the movable part can stretch out and draw back in the axial direction of the air spring body relative to the guide part. The end, away from the movable part, of the guide part extends out of the air spring body in the axial direction of the air spring body and is used for being connected with a swing arm of a vehicle. According to the air spring structure and the suspension system in the scheme, in the scheme that the shock absorber and the air spring structure are arranged in a split mode, it can be guaranteed that the air spring body is not prone to side tipping during movement, and then the situation that the bag skin of the air spring body is disengaged due to lateral force is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile air spring, concretely relates to an air spring structure and suspension system. BACKGROUND

[0002] At present, the air spring and shock absorber of part of suspension system are integrated, and the air spring and shock absorber of another part of suspension system are separated. In the scheme that the air spring and shock absorber are integrated, the shock absorber can guide the movement of the air spring, but in the scheme that the air spring and shock absorber are separated, the shock absorber cannot guide the movement of the air spring, so that the air spring is prone to tilting when moving, resulting in that the bladder skin of the air spring is out of the air spring due to the lateral force. SUMMARY

[0003] The utility model discloses a kind of air spring structure and suspension system, in the scheme that shock absorber and air spring structure are separated, it can guarantee that air spring body is not prone to tilting when moving, to avoid the bladder skin of air spring body and out due to lateral force.

[0004] The utility model discloses a kind of air spring structure, comprising: air spring body and guide structure, the air spring body is equipped with gas storage cavity;The guide structure includes guide portion and movable part, the movable part is located in the gas storage cavity, one end of the movable part is connected with the air spring body, the other end of the movable part is connected with the guide portion, the movable part can be relative to the guide portion along the axial direction of the air spring body and is telescopic, the end of the guide portion away from the movable part is along the axial direction of the air spring body and is telescopic outside the air spring body, and it is used for being connected with the swing arm of vehicle.

[0005] In an exemplary embodiment of the utility model, guide cavity is equipped in the guide portion, and the movable part is telescopic in the guide cavity.

[0006] In an exemplary embodiment of the utility model, the movable part includes movable rod and lug portion, one end of the movable rod is connected with the air spring body, the other end of the movable rod is located in the guide cavity, the lug portion is connected to the end of the movable rod in the guide cavity, and is protrudingly arranged relative to the side peripheral surface of the movable rod, so as to limit the movable rod from sliding out of the guide cavity.

[0007] In an exemplary embodiment of the utility model, the guide portion includes guide cylinder and limiting assembly, the guide cavity is located in the guide cylinder, and the limiting assembly is located in the guide cavity and connected with the inner cylinder wall of the guide cylinder;The movable rod is arranged in the limiting assembly and can slide along the axial direction of the air spring body relative to the limiting assembly.

[0008] In an exemplary embodiment of the utility model, the limiting assembly comprises a first limiting piece and a second limiting piece, the first limiting piece and the second limiting piece are arranged along the axial direction of the air spring body, the first limiting piece and the second limiting piece are located in the guide cavity and are connected with the inner cylinder wall of the guide cylinder, the movable rod is arranged through the first limiting piece and the second limiting piece and can slide along the axial direction of the air spring body relative to the first limiting piece and the second limiting piece.

[0009] In an exemplary embodiment of the utility model, the guide structure further comprises lubricating liquid, the lubricating liquid is filled between the first limiting piece and the second limiting piece and surrounds the outer surface of the movable rod between the first limiting piece and the second limiting piece.

[0010] In an exemplary embodiment of the utility model, the guide cylinder is provided with a limiting boss, the limiting boss is arranged protruding relative to the cylinder wall of the guide cylinder, and the limiting boss is located on the side of the limiting assembly close to the swing arm.

[0011] In an exemplary embodiment of the utility model, the limiting boss divides the guide cavity into an upper guide cavity and a lower guide cavity, and the limiting boss limits the limiting assembly in the upper guide cavity.

[0012] In an exemplary embodiment of the utility model, the guide structure further comprises an inner cylinder, the inner cylinder is connected between the first limiting piece and the second limiting piece, and the inner cylinder is arranged spaced apart from the guide cylinder.

[0013] The utility model discloses a second aspect of a kind of suspension systems, including shock absorber and the air spring structure, the air spring structure and the shock absorber are arranged side by side and one end is connected to vehicle body, another end is connected to the swing arm.

[0014] The utility model scheme has the following beneficial effects:

[0015] In the embodiment of the utility model, when shock absorber and air spring structure are connected to swing arm, and shock absorber and air spring structure are arranged in a body, since one end of movable part is connected with air spring body, the other end of movable part is connected with guide part in a telescopic manner, and can be telescopic relative to guide part along the axial direction of air spring body, therefore, air spring body can be telescopic along the axial direction of air spring body with movable part simultaneously, to ensure that air spring body is not easy to tilt when moving, thereby avoiding that the bladder skin of air spring body is out due to lateral force.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings incorporated in the specification and forming a part thereof illustrate embodiments of the application and, together with the description, serve to explain the principles of the application. In the drawings:

[0018] Figure 1 A perspective structural schematic view showing that the suspension system in the embodiment of the present application is connected between the vehicle body and the subframe is shown.

[0019] Figure 2 A perspective structural schematic view showing the air spring structure in the embodiment of the present application is shown.

[0020] Figure 3 A sectional view of the air spring structure A-A in the embodiment of the present application is shown. Figure 2

[0021] Figure 4 An enlarged view of the air spring structure B in the embodiment of the present application is shown. Figure 3

[0022] Legend of reference signs:

[0023] 1, air spring structure; 101, gas storage cavity; 102, guide cavity; 102a, upper guide cavity; 102b, lower guide cavity; 103, first guide hole; 104, second guide hole; 11, air spring body; 111, upper support; 112, bladder skin; 113, piston; 114, protective sleeve; 115, dust cover; 12, guide structure; 121, guide part; 1211, guide cylinder; 1212, first limiting part; 1213, second limiting part; 122, movable part; 1221, movable rod; 1222, protruding block part; 123, lubricating liquid; 124, first sealing part; 125, second sealing part; 126, support part; 127, inner cylinder; 128, mounting lifting ring; 2, shock absorber; 3, subframe; 4, vehicle body; 5, first bushing; 6, second bushing; 7, nut; 8, spring disc; 9, swing arm; a, first limiting part; b, second limiting part; c, flange; d, limiting protrusion. DETAILED DESCRIPTION

[0024] ​​Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the example implementations to those skilled in the art.

[0025] Moreover, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the claimed application. One skilled in the relevant art will recognize, however, that the

[0026] The present application will be further described with reference to the drawings and specific embodiments. It is to be noted that the technical features involved in each of the embodiments of the present application described below can be combined with each other as long as there is no conflict. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and should not be construed as limiting the present application.

[0027] As shown in Figures 1 to 4 The present embodiment provides an air spring structure 1, comprising: an air spring body 11 and a guide structure 12, the air spring body 11 is provided with a gas storage cavity 101; the guide structure 12 comprises a guide part 121 and a movable part 122, the movable part 122 is located in the gas storage cavity 101, one end of the movable part 122 is connected with the air spring body 11, the other end of the movable part 122 is connected with the guide part 121 in an extendable and retractable manner, the movable part 122 can extend and retract along the axial direction of the air spring body 11 relative to the guide part 121, and the end of the guide part 121 away from the movable part 122 extends out of the air spring body 11 along the axial direction of the air spring body 11 and is used to be connected with the swing arm 9 of the vehicle.

[0028] In the present embodiment, as shown in Figure 1 The air spring structure 1 is connected between the vehicle body 4 and the auxiliary frame 3, and the air spring structure 1 is connected with the auxiliary frame 3 through the swing arm 9; the shock absorber 2 is connected between the vehicle body 4 and the auxiliary frame 3, and the shock absorber 2 is connected with the auxiliary frame 3 through the swing arm 9. Among them, the shock absorber 2 and the air spring structure 1 are arranged at intervals, that is, the shock absorber 2 and the air spring structure 1 are arranged separately.

[0029] In the present embodiment, as shown in Figure 1 and Figure 3As shown, the air spring body 11 comprises an upper support 111, a bladder skin 112 and a piston 113, the upper support 111 is connected with the movable part 122 and used to be connected with the vehicle body 4, one end of the bladder skin 112 is connected with the upper support 111 through a clasp, the other end of the bladder skin 112 is connected with the piston 113, and the piston 113 is connected with the guide part 121 through the spring plate 8. The cavity sealed by the upper support 111, the bladder skin 112, the piston 113 and the guide part 121 is the gas storage cavity 101.

[0030] It should be understood that when the air spring body 11 works, the gas storage cavity 101 is filled with compressed air to form a compressed air column. When the vibration load increases, the upper support 111 is close to the swing arm 9, the volume of the gas storage cavity 101 decreases, the stiffness of the air spring body 11 increases, and the effective bearing area of the compressed air column increases. When the vibration load decreases, the upper support 111 is away from the swing arm 9, the volume of the gas storage cavity 101 increases, the stiffness of the air spring body 11 decreases, and the effective bearing area of the compressed air column decreases.

[0031] In the embodiment, the air spring body 11 is arranged in the swing arm 9. Figure 3 As shown, the air spring body 11 further comprises a protective sleeve 114 and a dust cover 115, the protective sleeve 114 is arranged around the outer surface of the bladder skin 112, the protective sleeve 114 can not only protect the bladder skin 112 from being damaged by external objects, but also guide the expansion direction of the bladder skin 112 to avoid excessive deformation. The dust cover 115 is connected with the protective sleeve 114, and the dust cover 115 is used to prevent dust, sand, water and other pollutants from entering the air spring body 11, so as to ensure the normal operation of the air spring body 11 and prolong the service life.

[0032] In the embodiment, when the shock absorber 2 and the air spring structure 1 are both connected with the swing arm 9, and the shock absorber 2 and the air spring structure 1 are arranged separately, since one end of the movable part 122 is connected with the air spring body 11, the other end of the movable part 122 is connected with the guide part 121 in an extension and retraction mode, and the movable part 122 can extend and retract along the axial direction of the air spring body 11 relative to the guide part 121, therefore, the air spring body 11 can extend and retract along the axial direction of the air spring body 11 synchronously with the movable part 122, so as to ensure that the air spring body 11 is not easy to tilt during movement, thereby avoiding that the bladder skin 112 of the air spring body 11 is pulled out due to the lateral force.

[0033] It should be understood that since the guide structure 12 is arranged, the air spring body 11 is not easy to tilt during movement, therefore, the inclination angle of the air spring body 11 can not be limited.

[0034] In the embodiment, the air spring body 11 is arranged in the swing arm 9. Figure 3As shown, the guiding portion 121 is in a cylindrical shape and has a guiding cavity 102 inside, and the movable portion 122 is capable of extending and retracting along the axial direction of the guiding portion 121 in the guiding cavity 102. When the air spring body 11 moves, the movable portion 122 is capable of extending and retracting along the axial direction of the guiding portion 121, so as to prevent the air spring body 11 from tilting and thus avoid the capsule 112 of the air spring body 11 from being separated from the upper support 111 and the clasp ring due to the lateral force. In addition, the movable portion 122 is capable of avoiding interference with other components when moving in the guiding cavity 102 of the guiding portion 121.

[0035] In other embodiments, a guiding groove can be arranged in the guiding portion 121, and the movable portion 122 can move in the guiding groove.

[0036] In combination Figure 3 As shown, the movable portion 122 includes a movable rod 1221 and a protruding block portion 1222, one end of the movable rod 1221 is connected with the upper support 111, the other end of the movable rod 1221 is located in the guiding cavity 102, and the protruding block portion 1222 is connected with the end of the movable rod 1221 located in the guiding cavity 102 and protrudes relative to the side surface of the movable rod 1221, so as to limit the movable rod 1221 from sliding out of the guiding cavity 102.

[0037] In this embodiment, when the gas storage cavity 101 is pre-charged, the length of the air spring body 11 along the axial direction increases, and the upper support 111 drives the movable rod 1221 to move along the axial direction of the guiding cavity 102 and away from the guiding portion 121. The protruding block portion 1222 protrudes relative to the side surface of the movable rod 1221, and the protruding block portion 1222 is capable of limiting the movable rod 1221 from sliding out of the guiding cavity 102 and avoiding the failure of the guiding structure 12 due to the movable rod 1221 sliding out of the guiding cavity 102.

[0038] In this embodiment, the protruding block portion 1222 is in a "ring structure", and the protruding block portion 1222 surrounds the side surface of the movable rod 1221.

[0039] In other embodiments, the protruding block portion 1222 is in an "arc structure" or a "rectangular structure", and a plurality of protruding block portions 1222 spaced from each other surround the side surface of the movable rod 1221.

[0040] In combination Figure 3 and Figure 4 As shown, the guiding portion 121 includes a guiding cylinder 1211 and a limiting assembly, the guiding cavity 102 is located in the guiding cylinder 1211, the limiting assembly is located in the guiding cavity 102 and connected with the inner cylinder wall of the guiding cylinder 1211, and the movable rod 1221 penetrates through the limiting assembly and is capable of sliding along the axial direction of the air spring body 11 relative to the limiting assembly.

[0041] In the embodiment, the guide cylinder 1211 comprises an inner cylinder wall and an outer cylinder wall, the inner cylinder wall of the guide cylinder 1211 is connected with the limiting assembly, and the outer cylinder wall of the guide cylinder 1211 is connected with the piston 113. For the structure of the piston 113, please refer to the prior art, which will not be described here.

[0042] In the embodiment, when the air spring body 11 works, the limiting assembly can limit the movement direction of the movable rod 1221, the movable rod 1221 can slide along the axial direction of the air spring body 11 relative to the limiting assembly, so as to avoid the movable rod 1221 from contacting the cavity wall of the guide cavity 102; in addition, the limiting assembly is located between the movable rod 1221 and the guide cylinder 1211, and the limiting assembly can also bear part of the radial force, thereby playing a certain supporting role.

[0043] Further, the limiting assembly comprises a first limiting piece 1212 and a second limiting piece 1213, the first limiting piece 1212 and the second limiting piece 1213 are arranged in the axial direction of the air spring body 11 and spaced from each other, the first limiting piece 1212 and the second limiting piece 1213 are located in the guide cavity 102 and connected with the inner cylinder wall of the guide cylinder 1211; the movable rod 1221 is arranged through the first limiting piece 1212 and the second limiting piece 1213 and can slide along the axial direction of the air spring body 11 relative to the first limiting piece 1212 and the second limiting piece 1213.

[0044] In the embodiment, the first limiting piece 1212 is provided with a first guide hole 103, the second limiting piece 1213 is provided with a second guide hole 104, the movable rod 1221 is arranged through the first limiting piece 1212 and the second limiting piece 1213, the movable rod 1221 moves along the hole wall of the first guide hole 103 and the hole wall of the second guide hole 104, and the movable rod 1221 is spaced from the cavity wall of the guide cavity 102.

[0045] In the embodiment, when the air spring body 11 works, the first limiting piece 1212 and the second limiting piece 1213 can limit the movement direction of the movable rod 1221, so that the movable rod 1221 moves along the hole wall of the first guide hole 103 and the hole wall of the second guide hole 104, thereby avoiding the movable rod 1221 from contacting the cavity wall of the guide cavity 102; in addition, the first limiting piece 1212 and the second limiting piece 1213 are located between the movable rod 1221 and the guide cylinder 1211, and the first limiting piece 1212 and the second limiting piece 1213 can also bear part of the radial force, thereby playing a certain supporting role.

[0046] In the embodiment, the first guide hole 103 and the second guide hole 104 are the same in size and shape, and the first guide hole 103 and the second guide hole 104 are coaxial with the guide cylinder 1211, so as to avoid the movable rod 1221 from contacting the cavity wall of the guide cavity 102.

[0047] For example, the first limiting member 1212 and the second limiting member 1213 can be sliding bearings.

[0048] In the embodiment, the protruding block 1222 is connected to the end of the movable rod 1221 away from the upper support 111, the second limiting member 1213 is located between the first limiting member 1212 and the protruding block 1222, and the second limiting member 1213 can limit the movement of the protruding block 1222 to avoid the movable rod 1221 from sliding out of the guide cavity 102.

[0049] In combination with Figure 3 and Figure 4 As shown in the figures, the first limiting member 1212 and the second limiting member 1213 each include a first limiting part a and a second limiting part b connected to each other, the first limiting part a is located between the second limiting part b and the movable rod 1221, and the second limiting part b is connected to the guide cylinder 1211; the first guide hole 103 is located in the first limiting part a of the first limiting member 1212, and the second guide hole 104 is located in the first limiting part a of the second limiting member 1213.

[0050] In the embodiment, the first limiting part a is a bushing, the first limiting part a is located between the second limiting part b and the movable rod 1221, and the first limiting part a can bear part of the radial force and has a certain supporting effect. In addition, the surface of the first limiting part a in contact with the movable rod 1221 is provided with a wear-resistant coating, which can reduce the friction and wear.

[0051] For example, the wear-resistant coating can be made of Teflon or other materials.

[0052] In the embodiment, in combination with Figure 1 and Figure 4 As shown in the figures, the guide structure 12 further includes a lubricating liquid 123, which is filled between the first limiting member 1212 and the second limiting member 1213 and surrounds the outer surface of the movable rod 1221 between the first limiting member 1212 and the second limiting member 1213. The addition of the lubricating liquid 123 between the first limiting member 1212 and the second limiting member 1213 forms an oil film between the contact surfaces of the movable rod 1221 and the first limiting member 1212 and the second limiting member 1213, preventing direct contact and facilitating the reduction of friction and wear.

[0053] In the embodiment, the guide structure 12 further includes a first sealing member 124 and a second sealing member 125 spaced from each other, the first sealing member 124 is located on the side of the first limiting member 1212 away from the second limiting member 1213, and the second sealing member 125 is located on the side of the second limiting member 1213 away from the first limiting member 1212, for sealing the lubricating liquid 123.

[0054] In combination with Figure 1 and Figure 4As shown, the guide cylinder 1211 is provided with a limiting boss d, which is protruding relative to the inner cylinder wall of the guide cylinder 1211 and located on the side of the second limiting member 1213 close to the swing arm 9.

[0055] In the embodiment, the limiting boss d is arranged around the inner cylinder wall of the guide cylinder 1211 and protrudes relative to the inner cylinder wall of the guide cylinder 1211. When the first limiting member 1212 and the second limiting member 1213 are installed in the guide cylinder 1211, the second limiting member 1213 will abut against the limiting boss d along the axial direction of the guide cavity 102, and the limiting boss d can limit the installation position of the first limiting member 1212 and the second limiting member 1213.

[0056] In combination Figure 1 and Figure 4 As shown, the limiting boss d divides the guide cavity 102 into an upper guide cavity 102a and a lower guide cavity 102b, and limits the first limiting member 1212 and the second limiting member 1213 in the upper guide cavity 102a.

[0057] In the embodiment, the limiting boss d can divide the guide cavity 102 into the upper guide cavity 102a and the lower guide cavity 102b, so as to limit the first limiting member 1212 and the second limiting member 1213 in the upper guide cavity 102a. The first limiting member 1212 and the second limiting member 1213 are both located in the upper guide cavity 102a, so that the first limiting member 1212 and the second limiting member 1213 can be closer to the upper support 111 of the air spring body 11, and can better limit the movable rod 1221 to avoid large deflection amplitude of the end of the movable rod 1221 connected to the upper support 111.

[0058] Further, the first limiting member 1212 and the second limiting member 1213 are located at the middle position of the movable rod 1221, so that the first limiting member 1212 and the second limiting member 1213 can avoid large deflection amplitude of the two ends of the movable rod 1221.

[0059] It should be understood that the middle position of the movable rod 1221 is the middle position in the length direction of the movable rod 1221, and the middle position can have a certain deviation.

[0060] In the embodiment, one end of the guide cylinder 1211 is provided with a mounting ring 128, which is connected to the swing arm 9 through the first bushing 5; the end of the movable rod 1221 away from the guide portion 121 is connected to the upper support 111 through the nut 7 and sealed to the air storage cavity 101 through the second bushing 6 and the sealing ring. The two ends of the air spring body 11 are provided with the first bushing 5 and the second bushing 6 one by one, so as to achieve the effect of double vibration filtering, which is conducive to improving the comfort of the vehicle.

[0061] In the embodiment, the guide structure 12 further comprises a support 126 located between the second seal 125 and the limiting boss d along the axial direction of the guide cavity 102, and the support 126 is used to fill the gap between the second seal 125 and the limiting boss d, so as to facilitate the installation of the second seal 125 and ensure the sealing performance of the second seal 125.

[0062] In combination with Figure 1 and Figure 4 As shown in the figure, the guide structure 12 further comprises an inner cylinder 127 located in the guide cavity 102 and coaxial with the guide cylinder 1211, the inner cylinder 127 is connected between the first limiting part 1212 and the second limiting part 1213, and the outer side wall of the inner cylinder 127 is spaced apart from the inner side wall of the guide cylinder 1211.

[0063] In the embodiment, the inner cylinder 127 is located in the upper guide cavity 102a and connected between the second limiting part b of the first limiting part 1212 and the second limiting part b of the second limiting part 1213 along the axial direction of the guide cavity 102, so that the first limiting part 1212 and the second limiting part 1213 are spaced apart from each other to support the first limiting part 1212 and the second limiting part 1213; in addition, the lubricating liquid 123 is arranged in the inner cylinder 127, and the inner cylinder 127 can better seal the lubricating liquid 123 to avoid the overflow of the lubricating liquid 123.

[0064] In the embodiment, the installation steps of the components in the upper guide cavity 102a are as follows: along the direction from the upper guide cavity 102a to the lower guide cavity 102b, first, the support 126 is placed into the upper guide cavity 102a and abuts against the limiting boss d; second, the second seal 125 is placed into the upper guide cavity 102a; third, the second limiting part 1213, the inner cylinder 127 and the first limiting part 1212 are sequentially placed into the upper guide cavity 102a; then, the first seal 124 is placed into the upper guide cavity 102a; finally, after all the components in the upper guide cavity 102a are compressed tightly, the end of the guide cylinder 1211 away from the installation lifting ring 128 is pressed inward to be a flange c, so as to limit the movement of the first seal 124, and the installation is completed.

[0065] The embodiment provides a suspension system, which comprises the shock absorber 2 and the air spring structure 1 described above, the air spring structure 1 and the shock absorber 2 are arranged side by side, one end of the air spring structure 1 and the shock absorber 2 is connected to the vehicle body 4, and the other end of the air spring structure 1 and the shock absorber 2 is connected to the swing arm 9.

[0066] The embodiment further provides a vehicle, which comprises the vehicle body 4, the auxiliary frame 3 and the suspension system described above, and the suspension system is connected between the vehicle body 4 and the auxiliary frame 3.

[0067] In the utility model, unless another definite provision and limitation, the term "assemble", "connect" and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection;Can be directly connected, also can pass through intermediate medium indirectly connect, can be two element inside's intercommunication or two element's mutual action relation. For ordinary skilled person in the art, can understand the specific meaning of above-mentioned term in the utility model according to specific circumstances.

[0068] In addition, the terms "first", "second", are used only for descriptive purposes and not to be construed as indicating or implying relative importance or an indicated number of technical features. Thus, features defined with "first", "second" can explicitly or implicitly include one or more of the features. The meaning of "multiple" is two or more, unless otherwise explicitly specified. And the description of the terms "some embodiments", "exemplarily" and so on means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model.

[0069] The illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0070] Although the embodiments of the utility model have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and modify the above-mentioned embodiments within the scope of the utility model, therefore, whatever change or modification made according to the claims and specification of the utility model, should all belong to the scope covered by the utility model patent.

Claims

1. An air spring structure, characterized by, include: The air spring body has an air storage chamber inside it; The guide structure includes a guide portion and a movable portion. The movable portion is located inside the air storage cavity. One end of the movable portion is connected to the air spring body, and the other end of the movable portion is telescopically connected to the guide portion. The movable portion can telescopically extend relative to the guide portion along the axial direction of the air spring body. The end of the guide portion away from the movable portion extends out of the air spring body along the axial direction of the air spring body and is used to connect with the vehicle's swing arm.

2. The air spring structure of claim 1, wherein, The guide section has a guide cavity, and the movable section moves telescopically within the guide cavity.

3. The air spring structure of claim 2, wherein, The movable part includes a movable rod and a protrusion. One end of the movable rod is connected to the air spring body, and the other end of the movable rod is located in the guide cavity. The protrusion is connected to the end of the movable rod in the guide cavity and protrudes from the side circumferential surface of the movable rod to restrict the movable rod from sliding out of the guide cavity.

4. The air spring structure of claim 3, wherein, The guide portion includes a guide cylinder and a limiting component. The guide cavity is located inside the guide cylinder, and the limiting component is located inside the guide cavity and connected to the inner wall of the guide cylinder. The movable rod passes through the limiting component and can slide relative to the limiting component along the axial direction of the air spring body.

5. The air spring structure of claim 4, wherein, The limiting component includes a first limiting member and a second limiting member. The first limiting member and the second limiting member are spaced apart from each other along the axial direction of the air spring body. Both the first limiting member and the second limiting member are located in the guide cavity and are connected to the inner wall of the guide cylinder. The movable rod passes through the first limiting member and the second limiting member, and can slide relative to the first limiting member and the second limiting member along the axial direction of the air spring body.

6. The air spring structure of claim 5, wherein, The guide structure also includes a lubricant, which fills the space between the first limiting member and the second limiting member and surrounds the outer surface of the movable rod between the first limiting member and the second limiting member.

7. The air spring structure of claim 4, wherein, The guide cylinder is provided with a limiting boss, which protrudes from the cylinder wall of the guide cylinder and is located on the side of the limiting component near the swing arm.

8. The air spring structure of claim 7, wherein, The limiting boss divides the guide cavity into an upper guide cavity and a lower guide cavity, and the limiting boss limits the limiting component within the upper guide cavity.

9. The air spring structure of claim 5, wherein, The guide structure further includes an inner cylinder, which is connected between the first limiting member and the second limiting member, and the inner cylinder and the guide cylinder are spaced apart.

10. A suspension system characterized by, It includes a shock absorber and an air spring structure as described in any one of claims 1-9, wherein the air spring structure and the shock absorber are arranged side by side and one end of each is connected to the vehicle body, and the other end of each is connected to the swing arm.

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