Suspension and vehicle

Abstract

The application discloses a kind of suspension and vehicle, the suspension includes shock absorber, air spring, force component and sealing ring, the shock absorber includes tray;The air spring is sleeved to the outside of the shock absorber, and the air spring includes connected air bag and piston;In the axial direction of the shock absorber, the force component is clamped between the piston and the tray, and the force component includes rotatably connected fixed part and rotating part, the rotating part is connected with the shock absorber, and the fixed part is connected with the piston;The sealing ring is sleeved to the outside of the shock absorber, and the sealing ring is elastic member, and two ends of the sealing ring are respectively connected with the shock absorber and the piston sealingly.The suspension of the embodiment of the application has the advantages of good reliability.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, specifically to a suspension and a vehicle. Background Technology

[0002] The suspension system is a general term for all force-transmitting connections between the vehicle frame and the axle. It mainly consists of three parts: elastic elements, shock absorbers, and force transmission devices. These three parts respectively function as buffers, dampers, and force transmitters. Elastic elements support vertical loads and mitigate vibrations and impacts caused by uneven road surfaces. Elastic elements mainly include coil springs, air springs, and rubber springs. Shock absorbers are used to suppress the oscillations caused by the rebound of vibrations absorbed by the elastic elements and impacts from the road surface. Shock absorbers are mainly of two types: hydraulic and pneumatic.

[0003] In related technologies, suspensions using air springs as the elastic element, such as... Figure 4 As shown, the shock absorber 10 includes a cylinder 101 and a piston rod 102 inserted into the cylinder 101. A tray 103 is provided on the cylinder 101. The air spring 20 includes a top cover 201, an air bladder 202, and a piston 203. One end of the air bladder 202 is connected to the top cover 201, and the other end is connected to the piston 203. The air spring 20 is sleeved on the outside of the shock absorber 10. The top cover 201 is sealed to the end of the piston rod 102. The piston 203 is interference-fitted with the cylinder 101, and a sealing ring 30 is provided between the piston 203 and the cylinder 101. The bottom end of the piston 203 abuts against the tray 103, which is used to bear the pressure from the air spring 20. The stiffness of the air spring 20 is adjusted by inflating and deflating the air bladder 202.

[0004] Currently, the air spring 20's airbag 202 generally uses a cross-cord process, resulting in high torsional stiffness, which is insufficient to absorb the rotational motion of the shock absorber 10. When the suspension 1000 moves or turns, the cylinder 101 of the shock absorber 10 easily rotates. This rotation drives the piston 203 of the air spring 20 to rotate synchronously, transmitting the rotational motion to the airbag 202. This causes the airbag 202 to continuously bear a large torsional angle. Over time, the airbag 202 is prone to wear and even cracking and leaking. Ultimately, this leads to the failure of the air spring 20 in the suspension 1000, and the suspension 1000 loses its cushioning function.

[0005] Furthermore, if the torsion angle of the airbag 202 is large, the torsional stiffness of the airbag 202 will increase accordingly. This will allow the cylinder 101 to easily overcome the friction between the piston 203 and the bearing plate 103, causing relative rotation between the cylinder 101 and the piston 203. At this time, the sealing ring 30, located between the cylinder 101 and the piston 203, will experience sliding friction with at least one of the cylinder 101 and the piston 203, leading to wear of the sealing ring 30 and even failure and air leakage. Ultimately, this will also cause the air spring 20 of the suspension 1000 to fail, and the suspension 1000 will lose its cushioning function. Moreover, when the cylinder 101 rotates relative to the piston 203, the piston 203 and the bearing plate 103 will also produce abnormal noise due to sliding friction. In summary, the suspension 1000 has a problem with poor reliability.

[0006] To address the aforementioned issues, some suspension systems incorporate a thickened rubber ring between the air spring piston and the shock absorber's tray. This thickened rubber ring is sandwiched between the piston and the tray. When the shock absorber rotates, this rotation drives the thickened rubber ring to rotate as well. The ring undergoes torsional deformation, absorbing the rotational motion and preventing torsional deformation of the air spring's bladder. However, it's understandable that this thickened rubber ring, sandwiched between the piston and tray, must bear the load from the air spring. Under this load, the ring compresses, increasing its stiffness and significantly reducing its ability to undergo torsional deformation. This makes it easier for the rotational motion to be transmitted to the piston, causing the air spring's bladder to rotate with the shock absorber. This leaves a significant risk of elastic element failure in the suspension, resulting in relatively poor suspension reliability. Summary of the Invention

[0007] The present invention aims to at least partially solve one of the technical problems in the related art.

[0008] Therefore, embodiments of the present invention propose a suspension to reduce the risk of air spring failure.

[0009] The suspension system of this invention includes a shock absorber, an air spring, a load-bearing assembly, and a sealing ring. The shock absorber includes a tray. The air spring is sleeved on the outside of the shock absorber and includes a piston. In the axial direction of the shock absorber, the load-bearing assembly is clamped between the piston and the tray. The load-bearing assembly includes a fixed member and a rotating member rotatably connected. The rotating member is connected to the shock absorber, and the fixed member is connected to the piston. The sealing ring is sleeved on the outside of the shock absorber. The sealing ring is an elastic member, and its two ends are respectively sealed to the shock absorber and the piston.

[0010] In some embodiments, the load-bearing component is a thrust bearing, which includes a housing ring, a shaft ring, and rolling elements disposed between the housing ring and the shaft ring. The housing ring forms the rotating component, and the shaft ring forms the fixing component.

[0011] In some embodiments, the suspension further includes an annular connecting member, which is a rigid member, and is sleeved on the outside of the shock absorber; the connecting member is spaced apart from the piston, the sealing ring is spaced apart from the shock absorber, the sealing ring is fixedly connected to the connecting member, and the connecting member is sealed to the shock absorber so that the sealing ring is sealed to the shock absorber.

[0012] In some embodiments, a first receiving space is defined between the damper, the piston, and the connector, or between the damper, the piston, the load-bearing component, and the connector; the sealing ring is disposed within the first receiving space.

[0013] In some embodiments, at least a portion of the connector is clamped between the load-bearing component and the tray in the axial direction of the damper, so that the connector is connected to the damper.

[0014] In some embodiments, the connector includes a first rigid segment and a second rigid segment, the outer diameter of the first rigid segment being larger than the outer diameter of the second rigid segment, the first rigid segment being disposed closer to the tray in the axial direction of the damper than the second rigid segment, and the sealing ring being fixedly connected to the second rigid segment; the load-bearing component is sleeved on the outside of the second rigid segment, and the first rigid segment is clamped between the load-bearing component and the tray in the axial direction of the damper.

[0015] In some embodiments, in the axial direction of the damper, the rotating member is disposed closer to the tray than the fixed member; in the inward and outward directions, the rotating member is interference-fitted with the second rigid section, and the fixed member is spaced apart from the second rigid section.

[0016] In some embodiments, the side of the fixing member facing away from the rotating member has a flange, and the piston is interference-fitted with the flange in the inward and outward directions.

[0017] In some embodiments, the flange is disposed between the piston and the second rigid section in the inward and outward directions.

[0018] In some embodiments, the piston includes a flared section, and the flange is disposed between the flared section and the second rigid section, wherein the flared section and the flange are interference-fitted.

[0019] In some embodiments, the piston includes a first piston section, a second piston section, and a third piston section connected in sequence. In the axial direction of the damper, the third piston section is disposed closer to the tray than the first piston section. The inner diameter of the first piston section is smaller than the inner diameter of the third piston section. The inner diameter of the second piston section gradually increases along the direction from the first piston section to the third piston section. The second piston section and the third piston section form the flared section. At least a portion of the first piston section is sleeved outside the second rigid section. The third piston section is interference-fitted with the flange. A first receiving space is defined between the damper, the first piston section, and the second rigid section, and the sealing ring is disposed within the first receiving space. A second receiving space is defined between the second rigid section, the second piston section, and the third piston section, and the flange is disposed within the second receiving space.

[0020] In some embodiments, the sealing ring extends axially along the damper, a portion of the first piston section is sleeved outside the second rigid section, and another portion of the first piston section is sleeved outside the sealing ring; one end of the sealing ring near the tray is fixedly connected to the second rigid section, and the other end of the sealing ring away from the tray is sealed to the first piston section.

[0021] In some embodiments, the suspension further includes a sealing ring, which is clamped between the connector and the shock absorber in the inward and outward directions; and / or the sealing ring extends axially along the shock absorber, with one end of the sealing ring near the tray fixedly connected to the connector, and the other end of the sealing ring away from the tray sealed to the piston, the sealing ring including a thickness variation section whose thickness gradually decreases in the direction away from the tray; and / or the connector is a plastic part or a rubber part.

[0022] In some embodiments, the sealing ring is sealed to the piston via a snap ring; and / or the sealing ring is a rubber component.

[0023] Embodiments of the present invention also propose a vehicle having the above-described suspension.

[0024] The vehicle in this embodiment of the invention includes the suspension described in any of the above embodiments.

[0025] In this embodiment of the suspension, the load-bearing component is positioned between the piston and the tray. On one hand, the load on the air spring can be transferred to the tray through the load-bearing component. On the other hand, when the shock absorber rotates, the rotating component rotates relative to the fixed component, preventing the piston from rotating with the shock absorber. By sealing both ends of the sealing ring to the shock absorber and the piston respectively, on one hand, the sealing ring achieves a seal between the shock absorber and the piston, preventing air leakage at the connection point. On the other hand, when the shock absorber rotates, the sealing ring, due to its low stiffness, undergoes torsional deformation with the shock absorber, absorbing the rotational motion of the shock absorber and thus preventing the piston from rotating with the shock absorber.

[0026] In practice, the load-bearing component is mainly used to transfer the load on the air spring to the shock absorber tray, while the sealing ring is mainly used to absorb the rotational motion of the shock absorber. Since the sealing ring absorbs the rotational motion of the shock absorber, it does not need to bear the load on the air spring, and its stiffness is naturally unaffected by the load on the air spring, remaining within a relatively small stiffness range. Compared to the existing technology of placing a thickened rubber ring between the air spring piston and the shock absorber tray, the sealing ring can more effectively absorb the rotational motion of the shock absorber, thereby more effectively preventing the air spring bladder from rotating with the shock absorber and improving the reliability of the suspension. Therefore, the suspension of this invention has advantages such as high reliability. Attached Figure Description

[0027] Figure 1 This is a partial structural schematic diagram of a suspension according to an embodiment of the present invention.

[0028] Figure 2 yes Figure 1 A schematic diagram of the structure at the junction of the piston and the shock absorber.

[0029] Figure 3 yes Figure 2 A partial structural diagram.

[0030] Figure 4 This is a partial structural diagram of the suspension in related technologies.

[0031] Figure label:

[0032] 100. Suspension;

[0033] 1. Shock absorber; 11. Cylinder block; 111. Tray; 12. Piston rod;

[0034] 2. Air spring; 21. Airbag; 22. Piston; 221. First piston section; 222. Second piston section; 223. Third piston section; 23. Top cover;

[0035] 3. Load-bearing components; 31. Fasteners; 311. Flanged edges; 32. Rotating components; 33. Seat rings; 34. Shaft rings;

[0036] 4. Sealing ring; 41. Thickness variation section; 42. Constant thickness section;

[0037] 5. Connecting component; 51. First rigid section; 52. Second rigid section;

[0038] 61. First containment space; 62. Second containment space;

[0039] 7. Sealing ring;

[0040] 8. Receiving tank;

[0041] 9. Snap ring;

[0042] 1000, Suspension;

[0043] 10. Shock absorber; 101. Cylinder block; 102. Piston rod; 103. Tray;

[0044] 20. Air spring; 201. Top cover; 202. Airbag; 203. Piston;

[0045] 30. Sealing ring. Detailed Implementation

[0046] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0047] like Figures 1 to 3 As shown, the suspension 100 of this embodiment includes a shock absorber 1, an air spring 2, a load-bearing assembly 3, and a sealing ring 4. The air spring 2 is sleeved on the outside of the shock absorber 1. The shock absorber 1 includes a tray 111, and the air spring 2 includes a piston 22. The load-bearing assembly 3 is clamped between the piston 22 and the tray 111 along the axial direction of the shock absorber 1. The load-bearing assembly 3 includes a fixed member 31 and a rotating member 32 rotatably connected. The rotating member 32 is connected to the shock absorber 1, and the fixed member 31 is connected to the piston 22. The sealing ring 4 is sleeved on the outside of the shock absorber 1. The sealing ring 4 is an elastic element, and its two ends are respectively sealed to the shock absorber 1 and the piston 22.

[0048] Here, "outward" refers to the direction away from the axis of the damper 1 on a plane perpendicular to the axis of the damper 1; "inward" refers to the direction close to the axis of the damper 1 on a plane perpendicular to the axis of the damper 1. The inward and outward directions are as follows: Figure 1 and Figure 2 As shown.

[0049] It is understandable that the fixed part 31 and the rotating part 32 are rotatably connected, resulting in a very small torque between them. When the rotating part 32 rotates, the fixed part 31 will not rotate with it. The sealing ring 4 is an elastic element, which means that the sealing ring 4 has low torsional stiffness and can undergo large torsional deformation without being damaged.

[0050] The air spring 2 includes an air bladder 21, which is fixedly connected to a piston 22. In the axial direction of the damper 1, the piston 22 is positioned closer to the tray 111 than the air bladder 21. The stiffness of the air spring 2 can be adjusted by inflating or deflating the air bladder 21.

[0051] In this embodiment of the invention, the suspension 100, by arranging the load-bearing component 3 between the piston 22 and the tray 111, allows the load on the air spring 2 to be transferred to the tray 111 via the load-bearing component 3. Furthermore, when the shock absorber 1 rotates, the rotating component 32 rotates relative to the fixed component 31, preventing the piston 22 from rotating with the shock absorber 1. By sealing the two ends of the sealing ring 4 to the shock absorber 1 and the piston 22 respectively, the sealing ring 4 achieves a seal between the shock absorber 1 and the piston 22, preventing air leakage at the connection point. Additionally, when the shock absorber 1 rotates, the sealing ring 4, due to its low stiffness, undergoes torsional deformation with the shock absorber 1, absorbing the rotational motion of the shock absorber 1 and preventing the piston 22 from rotating with the shock absorber 1.

[0052] Therefore, the above design of the suspension 100 can ensure the sealing of the connection between the piston 22 and the shock absorber 1, while avoiding the torsional deformation of the airbag 21 when the shock absorber 1 rotates. This can prevent the airbag 21 from wearing or even cracking and leaking air, thereby reducing the risk of failure of the air spring 2 and improving the reliability of the suspension 100.

[0053] In fact, the load-bearing component 3 is mainly used to transfer the load on the air spring 2 to the tray 111, while the sealing ring 4 is mainly used to absorb the rotational motion of the shock absorber 1. Since the sealing ring 4, which absorbs the rotational motion of the shock absorber 1, does not need to bear the load on the air spring 2, its stiffness is naturally not affected by the load on the air spring 2 and can be kept within a small stiffness range. Compared with the existing technology of setting a thickened rubber ring between the piston of the air spring and the tray of the shock absorber, the sealing ring 4 can more effectively absorb the rotational motion of the shock absorber 1, thereby more effectively preventing the air bladder 21 of the air spring 2 from rotating with the shock absorber 1 and improving the reliability of the suspension 100.

[0054] Therefore, the suspension 100 of the present invention has advantages such as high reliability.

[0055] Furthermore, in the existing technology, a thickened rubber ring is placed between the piston of the air spring and the tray of the shock absorber. During vehicle operation, the pressure applied by the air spring to the thickened rubber ring is unstable, resulting in an unstable thickness of the thickened rubber ring (the dimension of the thickened rubber ring in the axial direction of the shock absorber). This leads to an unstable suspension height, which in turn directly affects the overall vehicle height. Ultimately, this makes it difficult to apply the suspension to vehicles, meaning that the suspension has poor practicality.

[0056] The suspension 100 of this embodiment can transfer the load on the air spring 2 to the load-bearing component 3 of the tray 111, which can be made into a rigid component to avoid the thickness of the load-bearing component 3 changing due to different loads on the air spring 2. This allows the height of the suspension 100 to remain constant. Compared with the prior art, which sets a thickened rubber ring between the piston of the air spring and the tray of the shock absorber, the practicality of the suspension 100 is improved.

[0057] like Figure 1 As shown, the shock absorber 1 includes a cylinder 11 and a piston rod 12. The piston rod 12 is movably inserted into the cylinder 11 along the axial direction of the shock absorber 1, and a tray 111 is disposed on the cylinder 11. The tray 111 and the cylinder 11 can be welded together. The air spring 2 includes a top cover 23, which is connected to the end of the air spring 21 away from the piston 22, and is also connected to the piston rod 12 of the shock absorber 1.

[0058] To make the technical solution of this application easier to understand, the following description further illustrates the technical solution of this application, taking the example that the axial direction of the damper 1 is aligned with the vertical direction. Wherein, the vertical direction is as follows... Figures 1 to 3 As shown.

[0059] The piston rod 12 is located on the upper side of the cylinder body 11 and is movably inserted into the cylinder body 11 in the vertical direction. The tray 111 is located at the lower part of the cylinder body 11. The top cover 23 is located on the upper side of the airbag 21, and the piston 22 is located on the lower side of the airbag 21. The load-bearing component 3 is clamped between the piston 22 and the tray 111 in the vertical direction. The lower end of the sealing ring 4 is connected to the shock absorber 1, and the upper end of the sealing ring 4 is connected to the piston 22.

[0060] In some embodiments, the suspension 100 further includes an annular connecting member 5, which is a rigid member and is sleeved on the outside of the shock absorber 1. The connecting member 5 is spaced apart from the piston 22, and the sealing ring 4 is spaced apart from the shock absorber 1. The sealing ring 4 is fixedly connected to the connecting member 5, and the connecting member 5 is sealed to the shock absorber 1, so that the sealing ring 4 is connected to the shock absorber 1.

[0061] The spacing between the connecting member 5 and the piston 22 can be understood as follows: there is a gap between the connecting member 5 and the piston 22, meaning that the connecting member 5 and the piston 22 do not contact each other. Similarly, the spacing between the sealing ring 4 and the vibration damper 1 can be understood as follows: there is a gap between the sealing ring 4 and the vibration damper 1, meaning that the sealing ring 4 and the vibration damper 1 do not contact each other. The fact that the connecting member 5 is a rigid component means that the connecting member 5 has greater stiffness than the sealing ring 4.

[0062] For example, the connector 5 is sleeved on the outside of the cylinder body 11, and the sealing ring 4 is spaced apart from the cylinder body 11, so that the connector 5 is sealed to the cylinder body 11. In the inward and outward directions, the connector 5 is spaced apart from the piston 22, and the sealing ring 4 is spaced apart from the cylinder body 11.

[0063] Through the above design, when the shock absorber 1 rotates and the sealing ring 4 undergoes torsional deformation along with the shock absorber 1, on the one hand, there will be no contact friction between the connecting part 5 and the piston 22. This not only effectively avoids wear on the piston 22 and the connecting part 5, but also avoids abnormal noise caused by mutual friction between the connecting part 5 and the piston 22. On the other hand, there will be no frictional contact between the sealing ring 4 and the shock absorber 1. This not only effectively avoids wear on the sealing ring 4, which is beneficial to extending the service life of the sealing ring 4, but also avoids abnormal noise caused by mutual friction between the sealing ring 4 and the shock absorber 1. This is beneficial to further extend the service life of the air spring 2, improve the reliability of the suspension 100, and effectively avoid abnormal noise during the use of the suspension 100.

[0064] Optionally, the sealing ring 4 extends axially along the damper 1. The end of the sealing ring 4 near the tray 111 is fixedly connected to the connector 5, and the end of the sealing ring 4 away from the tray 111 is sealed to the piston 22. The sealing ring 4 includes a thickness-changing section 41. The thickness of the thickness-changing section 41 gradually decreases in the direction away from the tray 111. Here, the thickness of the sealing ring 4 refers to the distance between the inner and outer circumferential surfaces of the sealing ring 4. The thickness of the thickness-changing section 41 gradually decreasing in the direction away from the tray 111 can be understood as: in the direction away from the tray 111, the distance between the inner and outer circumferential surfaces of the thickness-changing section 41 gradually decreases.

[0065] For example, such as Figure 2 As shown, the sealing ring 4 extends in the vertical direction, and its lower end is fixedly connected to the connector 5. The thickness of the thickness-changing section 41 gradually decreases from bottom to top. As a result, the end of the thickness-changing section 41 adjacent to the connector 5 has a larger thickness, while the end of the thickness-changing section 41 away from the connector 5 has a smaller thickness.

[0066] By setting a larger thickness at one end of the thickness variation section 41 adjacent to the connector 5, the connection reliability between the sealing ring 4 and the connector 5 is improved, which in turn further improves the reliability of the suspension 100. The thickness of the thickness variation section 41 gradually decreases in the direction away from the connector 5, making the thickness of the thickness variation section 41 away from the connector 5 thinner. This helps to reduce the stiffness of the sealing ring 4, thereby more effectively utilizing the sealing ring 4 to absorb the rotational motion of the shock absorber 1, which also helps to further improve the reliability of the suspension 100.

[0067] Optionally, the suspension 100 also includes a sealing ring 7, which is clamped between the connector 5 and the shock absorber 1 in the inward and outward directions.

[0068] For example, such as Figure 1 and Figure 2 As shown, the sealing ring 7 is clamped between the connector 5 and the cylinder 11.

[0069] By setting a sealing ring 7 between the connector 5 and the shock absorber 1, the sealing performance at the connection between the connector 5 and the shock absorber 1 can be improved, and air leakage at the connection between the connector 5 and the shock absorber 1 can be avoided more effectively, which is conducive to the mass application in the process.

[0070] Optionally, the sealing ring 7 is an O-ring.

[0071] Optionally, such as Figure 2 and Figure 3 As shown, the connector 5 has an annular clearance portion, and a receiving groove 8 is defined between the clearance portion and the damper 1. The sealing ring 7 is disposed in the receiving groove 8.

[0072] For example, such as Figure 2 and Figure 3 As shown, the opening of the receiving groove 8 faces upward, and the sealing ring 7 is clamped between the connector 5 and the shock absorber 1 in the inward and outward directions.

[0073] Optionally, such as Figure 2 and Figure 3 As shown, the sealing ring 4 is connected to the piston 22 via the snap ring 9.

[0074] For example, the sealing ring 4 is pressed against the inner surface of the piston 22 by the clamping ring, which has a large clamping force, good airtightness, and is easy to achieve mass application in terms of process.

[0075] Optionally, the sealing ring 4 also includes a constant thickness section 42, which is located on the side of the thickness variation section 41 away from the tray 111, and the constant thickness section 42 is sealed to the piston 22.

[0076] Among them, the equal thickness section 42 can be understood as: along the direction away from the tray 111, the distance between the inner and outer peripheral surfaces of the equal thickness section 42 is equal.

[0077] For example, the equal-thickness section 42 is connected to the piston 22 via a snap ring 9. The equal-thickness section 42 facilitates the connection between the sealing ring 4 and the piston 22.

[0078] Optionally, in the axial direction of the damper 1, at least a portion of the connector 5 is clamped between the load-bearing assembly 3 and the tray 111 so that the connector 5 is connected to the damper 1.

[0079] "At least a portion of the connector 5 is clamped between the load-bearing component 3 and the pallet 111" means that the entire connector 5 is clamped between the load-bearing component 3 and the pallet 111; or, a portion of the connector 5 is clamped between the load-bearing component 3 and the pallet 111, and another portion of the connector 5 is offset from the load-bearing component 3 and the pallet 111 in the inward and outward directions.

[0080] For example, such as Figure 1 As shown, in the vertical direction, a portion of the connector 5 is clamped between the load-bearing component 3 and the tray 111.

[0081] When the suspension 100 is installed on a vehicle, the air spring 2 supports the load of the entire vehicle, so that the connecting piece 5 is tightly attached to the load-bearing component 3 and the tray 111 and can rotate synchronously, thereby realizing the connection between the connecting piece 5 and the tray 111, that is, realizing the connection between the connecting piece 5 and the shock absorber 1.

[0082] Therefore, when assembling the suspension 100, it is only necessary to install at least a portion of the connector 5 between the load-bearing component 3 and the tray 111. There is no need to connect the connector 5 to the shock absorber 1 through welding, bonding or fasteners, which facilitates the connection between the connector 5 and the shock absorber 1, improves the assembly efficiency of the suspension 100 and reduces the cost of the suspension 100.

[0083] Optionally, the sealing ring 4 is a rubber component.

[0084] The low hardness of the rubber component allows the sealing ring 4 to have very low stiffness, thus enabling the sealing ring 4 to absorb the rotational motion of the shock absorber 1 more effectively, which is beneficial to further improving the reliability of the suspension 100.

[0085] Optionally, the connector 5 is a plastic part or a rubber part.

[0086] For example, connector 5 is made of nylon.

[0087] The cost of the connector 5 can be effectively reduced by making it a plastic or rubber part compared to making it a metal part, which in turn helps to further reduce the cost of the suspension 100.

[0088] Optionally, the connector 5 and the sealing ring 4 are integrally vulcanized. This not only improves the connection reliability between the connector 5 and the sealing ring 4, but also facilitates the processing and manufacturing of the connector 5 and the sealing ring 4.

[0089] Optionally, such as Figure 2 and Figure 3 As shown, the connecting member 5 includes a first rigid section 51 and a second rigid section 52. The outer diameter of the first rigid section 51 is larger than the outer diameter of the second rigid section 52. In the axial direction of the damper 1, the first rigid section 51 is positioned closer to the tray 111 than the second rigid section 52. The sealing ring 4 is fixedly connected to the second rigid section 52. The load-bearing component 3 is sleeved on the outside of the second rigid section 52. In the axial direction of the damper 1, the first rigid section 51 is clamped between the load-bearing component 3 and the tray 111.

[0090] The first rigid section 51 of the connector 5 is connected to the tray 111, and the second rigid section 52 of the connector 5 is fixedly connected to the sealing ring 4, so that the distance between the sealing ring 4 and the tray 111 and between the sealing ring 4 and the load-bearing component 3 is relatively large, which effectively avoids interference between the sealing ring 4 and the tray 111 or the load-bearing component 3, and is conducive to further improving the reliability of the suspension 100.

[0091] Optionally, in the axial direction of the damper 1, the rotating member 32 is positioned closer to the tray 111 than the fixed member 31. In the inward and outward directions, the rotating member 32 is interference-fitted with the second rigid section 52, and the fixed member 31 is spaced apart from the second rigid section 52.

[0092] The interval between the fastener 31 and the second rigid segment 52 means that there is a gap between the fastener 31 and the second rigid segment 52, that is, the fastener 31 and the second rigid segment 52 do not contact each other in the inward and outward directions.

[0093] By using the interference fit between the rotating part 32 and the second rigid section 52, the rotating part 32 can be connected to the connecting part 5. Since the connecting part 5 is connected to the tray 111, the rotating part 32 can be connected to the shock absorber 1.

[0094] When assembling the suspension 100, the rotating component 32 only needs to be sleeved on the outside of the second rigid section 52 to achieve the connection between the rotating component 32 and the shock absorber 1. There is no need to connect the rotating component 32 and the shock absorber 1 through welding, bonding or fasteners, which facilitates the connection between the rotating component 32 and the shock absorber 1, improves the assembly efficiency of the suspension 100 and reduces the cost of the suspension 100.

[0095] Optionally, such as Figure 3As shown, the load-bearing component 3 is a thrust bearing, which includes a seat ring 33, a shaft ring 34, and rolling elements (not shown in the figure) disposed between the seat ring 33 and the shaft ring 34. The seat ring 33 forms a rotating component 32, and the shaft ring 34 forms a fixed component 31.

[0096] The thrust bearing can be a ball bearing or a sliding bearing, or other types of thrust bearing. The seat ring 33 is fitted outside the second rigid section 52, and the seat ring 33 and the second rigid section 52 are interference-fitted.

[0097] By designing the load-bearing component 3 as a thrust bearing, the fixed component 31 and the rotating component 32 can withstand larger axial forces without damage, which helps to further improve the reliability of the suspension 100. In addition, the thrust bearing is a relatively mature component in the prior art, and there is no need to design and manufacture the load-bearing component 3 separately, which helps to further reduce the cost of the suspension 100.

[0098] Optionally, the side of the fixing member 31 facing away from the rotating member 32 has a flange 311. In the inward and outward directions, the piston 22 is interference-fitted with the flange 311.

[0099] For example, the side of the shaft ring 34 facing away from the seat ring 33 has a flange 311, and the inner circumferential surface of the piston 22 is interference-fitted with the flange 311 to realize the connection between the fixing member 31 and the piston 22.

[0100] When assembling the suspension 100, the piston 22 only needs to be fitted onto the outside of the fixing member 31 to achieve the connection between the piston 22 and the fixing member 31. There is no need for welding, bonding, or fasteners to connect the piston 22 and the fixing member 31, thus facilitating the connection, improving the assembly efficiency of the suspension 100, and reducing its cost. Furthermore, by providing a flange 311 on the fixing member 31, the contact area between the piston 22 and the fixing member 31 is increased, thereby increasing the adhesion force between the piston 22 and the fixing member 31 and making the piston 22 more stable.

[0101] Optionally, in the inward and outward directions, the flange 311 is disposed between the piston 22 and the second rigid section 52.

[0102] By placing the flange 311 between the piston 22 and the second rigid section 52 in the inward and outward directions, it is beneficial to improve the structural compactness of the suspension 100.

[0103] Optionally, a first receiving space 61 is defined between the shock absorber 1, the piston 22, and the connecting member 5, or a first receiving space 61 is defined between the shock absorber 1, the piston 22, the load-bearing assembly 3, and the connecting member 5. A sealing ring 4 is disposed within the first receiving space 61.

[0104] It is understandable that the sealing ring 4 will be subjected to a large air pressure inside the air spring 2. By placing the sealing ring 4 in the first receiving space 61, it is possible to effectively prevent the sealing ring 4 from expanding and deforming when subjected to large air pressure, thus affecting the stiffness of the sealing ring 4, which is conducive to further improving the reliability of the suspension 100.

[0105] Optionally, the piston 22 includes a flared section, and a flange 311 is disposed between the flared section and the second rigid section 52, with the flared section and the flange 311 having an interference fit.

[0106] The flange 311 is located between the flared section and the second rigid section 52, so that there is a sufficient gap between the piston 22 and the second rigid section 52, and a sufficient gap between the flange 311 and the second rigid section 52, effectively avoiding rotational interference between the connector 5 and the piston 22 and the flange 311.

[0107] Optionally, the piston 22 includes a first piston section 221, a second piston section 222, and a third piston section 223 connected in sequence. In the axial direction of the damper 1, the third piston section 223 is positioned closer to the tray 111 than the first piston section 221. The inner diameter of the first piston section 221 is smaller than the inner diameter of the third piston section 223. The inner diameter of the second piston section 222 gradually increases along the direction from the first piston section 221 to the third piston section 223. The second piston section 222 and the third piston section 223 form the aforementioned flared section. At least a portion of the first piston section 221 is fitted over the outside of the second rigid section 52, and the third piston section 223 is press-fitted with the flange 311. A first receiving space 61 is defined between the damper 1, the first piston section 221, and the second rigid section 52, and a sealing ring 4 is disposed within the first receiving space 61. A second receiving space 62 is defined between the second rigid section 52, the second piston section 222, and the third piston section 223, and the flange 311 is disposed within the second receiving space 62.

[0108] At least a portion of the first piston section 221 is sleeved on the outside of the second rigid section 52, which can be understood as: the first piston section 221 is entirely sleeved on the outside of the second rigid section 52; or, a portion of the first piston section 221 is sleeved on the outside of the second rigid section 52, and in the axial direction of the damper 1, another portion of the first piston section 221 is located on one side of the second rigid section 52.

[0109] For example, such as Figure 2 and Figure 3As shown, the first piston segment 221, the second piston segment 222, and the third piston segment 223 are connected sequentially from top to bottom, with the second piston segment 222 gradually tilting outwards from top to bottom. A first receiving space 61 is defined between the outer peripheral surface of the cylinder body 11, the inner peripheral surface of the first piston segment 221, and the upper end surface of the second rigid segment 52. A second receiving space 62 is defined between the outer peripheral surface of the second rigid segment 52, the inner peripheral surface of the second piston segment 222, and the inner peripheral surface of the third piston segment 223.

[0110] The sealing ring 4 is located between the first piston section 221, the second rigid section 52 and the shock absorber 1, defining a first receiving space 61. This effectively encloses the sealing ring 4 within the first receiving space 61, thus preventing it from expanding and deforming under the large air pressure inside the air spring 2. This further improves the reliability of the suspension 100.

[0111] Optionally, a portion of the first piston section 221 is fitted over the second rigid section 52, and another portion of the first piston section 221 is fitted over the sealing ring 4. The end of the sealing ring 4 near the tray 111 is fixedly connected to the second rigid section 52, and the end of the sealing ring 4 away from the tray 111 is sealed to the first piston section 221.

[0112] Therefore, the sealing ring 4 can be wrapped inside the first piston section 221, which can more effectively prevent it from expanding and deforming when subjected to large air pressure inside the air spring 2, and help to further improve the reliability of the suspension 100.

[0113] The suspension 100 of this embodiment utilizes a sealing ring 4, a connecting member 5, and a sealing ring 7 to achieve a sealed connection between the cylinder 11 of the shock absorber 1 and the piston 22 of the air spring 2, and can absorb the rotational movement of the shock absorber 1. Since the piston 22 of the air spring 2 supports the entire vehicle load, the rotating member 32 of the load-bearing component 3, the first rigid section 51 of the connecting member 5, and the tray 111 of the shock absorber 1 are tightly fitted together and move together, while the fixing member 31 of the load-bearing component 3 is tightly fitted with the piston 22 of the air spring 2. This not only solves the problem of wear, wrinkling, or even damage to the air spring 2 caused by its rotation with the shock absorber 1, but also avoids abnormal noise caused by friction between components. Furthermore, it is easy to achieve mass production in terms of manufacturing process.

[0114] The vehicle in this embodiment of the invention includes the suspension 100 described in any of the above embodiments.

[0115] The vehicle can be a double wishbone model with a large turning angle or a MacPherson strut model with steering function.

[0116] When the vehicle bounces up and down or turns, the cylinder 11 of the shock absorber 1 rotates, causing the sealing ring 7, connecting member 5, and rotating member 32 to rotate together. Since the rotating member 32 can rotate relative to the fixed member 31, the working torque between the rotating member 32 and the fixed member 31 is very small, and the rotating member 32 will not transmit the rotational motion of the cylinder 11 to the piston 22 of the air spring 2. At the same time, the sealing ring 4, which is fixedly connected to the connecting member 5, will rotate itself to absorb the rotational motion of the cylinder 11, so as to prevent the rotational motion of the cylinder 11 from being transmitted to the piston 22 of the air spring 2. This achieves the rotational decoupling of the shock absorber 1 and the air spring 2.

[0117] Because the suspension 100 of this embodiment has advantages such as high reliability, the vehicle of this embodiment also has advantages such as high reliability.

[0118] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0119] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0120] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0121] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0122] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0123] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A suspension system, characterized in that, include: A shock absorber, the shock absorber including a tray; An air spring, which is sleeved on the outside of the shock absorber, includes a piston; A load-bearing assembly is located axially on the damper and is clamped between the piston and the tray. The load-bearing assembly includes a fixed member and a rotating member that are rotatably connected. The rotating member is connected to the damper, and the fixed member is connected to the piston. and A sealing ring is fitted over the outside of the shock absorber. The sealing ring is an elastic element, and its two ends are respectively sealed to the shock absorber and the piston. The sealing ring includes a thickness-varying section, the thickness of which gradually decreases in the direction away from the tray, and the sealing ring extends in the vertical direction. A ring-shaped connector, which is a rigid component, is fitted onto the outside of the shock absorber; the lower end of the sealing ring is fixedly connected to the connector, and the thickness of the thickness-changing section gradually decreases from bottom to top.

2. The suspension according to claim 1, characterized in that, The load-bearing component is a thrust bearing, which includes a housing ring, a shaft ring, and rolling elements disposed between the housing ring and the shaft ring. The housing ring forms the rotating component, and the shaft ring forms the fixed component.

3. The suspension according to claim 1, characterized in that, The connecting member is spaced apart from the piston, the sealing ring is spaced apart from the damper, the sealing ring is fixedly connected to the connecting member, and the connecting member is sealed to the damper, so that the sealing ring is sealed to the damper.

4. The suspension according to claim 3, characterized in that, A first receiving space is defined between the shock absorber, the piston, and the connecting member, or A first receiving space is defined between the shock absorber, the piston, the load-bearing component, and the connector; The sealing ring is disposed within the first accommodating space.

5. The suspension according to claim 3, characterized in that, In the axial direction of the damper, at least a portion of the connector is clamped between the load-bearing component and the tray so that the connector is connected to the damper.

6. The suspension according to claim 5, characterized in that, The connector includes a first rigid section and a second rigid section. The outer diameter of the first rigid section is larger than the outer diameter of the second rigid section. In the axial direction of the damper, the first rigid section is disposed closer to the tray than the second rigid section. The sealing ring is fixedly connected to the second rigid section. The load-bearing component is sleeved outside the second rigid section, and the first rigid section is clamped between the load-bearing component and the tray in the axial direction of the damper.

7. The suspension according to claim 6, characterized in that, In the axial direction of the shock absorber, the rotating member is positioned closer to the tray than the fixed member; In the inward and outward directions, the rotating member is interference-fitted with the second rigid section, and the fixing member is spaced apart from the second rigid section.

8. The suspension according to claim 7, characterized in that, The side of the fixed member facing away from the rotating member has a flange, and the piston is interference-fitted with the flange in the inward and outward directions.

9. The suspension according to claim 8, characterized in that, In the inward and outward directions, the flange is located between the piston and the second rigid section.

10. The suspension according to claim 9, characterized in that, The piston includes a flared section, and the flange is disposed between the flared section and the second rigid section, with the flared section and the flange having an interference fit.

11. The suspension according to claim 10, characterized in that, The piston includes a first piston section, a second piston section, and a third piston section connected in sequence. In the axial direction of the damper, the third piston section is located closer to the tray than the first piston section. The inner diameter of the first piston section is smaller than the inner diameter of the third piston section. The inner diameter of the second piston section gradually increases along the direction from the first piston section to the third piston section. The second piston section and the third piston section form the flared section. At least a portion of the first piston section is sleeved outside the second rigid section, and the third piston section is interference-fitted with the flange. A first receiving space is defined between the shock absorber, the first piston section and the second rigid section, and the sealing ring is disposed within the first receiving space; A second receiving space is defined between the second rigid segment, the second piston segment, and the third piston segment, and the flange is disposed within the second receiving space.

12. The suspension according to claim 11, characterized in that, The sealing ring extends axially along the damper, a portion of the first piston section is sleeved outside the second rigid section, and another portion of the first piston section is sleeved outside the sealing ring; The end of the sealing ring closest to the tray is fixedly connected to the second rigid section, and the end of the sealing ring furthest from the tray is sealed to the first piston section.

13. The suspension according to any one of claims 3-12, characterized in that, The suspension also includes a sealing ring, which is clamped between the connector and the shock absorber in the inward and outward directions; and / or The sealing ring extends axially along the damper, with one end of the sealing ring near the tray fixedly connected to the connector, and the other end of the sealing ring away from the tray sealingly connected to the piston; and / or The connector is a plastic or rubber part.

14. The suspension according to any one of claims 1-12, characterized in that, The sealing ring is sealed to the piston via a snap ring; and / or The sealing ring is a rubber component.

15. A vehicle, characterized in that, The suspension includes any one of claims 1-14.

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