Air spring shock absorber and sliding and rotating structure thereof

Abstract

The utility model relates to an air spring shock absorber and a sliding and rotating structure thereof, the sliding and rotating structure of the air spring shock absorber comprises a piston, a shock absorber and a supporting seat, the shock absorber is arranged in the piston in a sleeved mode, and the supporting seat is connected to the outer side wall of the shock absorber; the positioning assembly is arranged between the piston and the supporting base and comprises a first annular positioning piece connected to the supporting base and a second annular positioning piece connected to the piston, and at least one of the first annular positioning piece and the second annular positioning piece is provided with a protruding part; the protruding part abuts against the other one of the first annular positioning piece and the second annular positioning piece. The sliding and rotating structure of the air spring shock absorber can reduce friction abnormal sound generated when the piston and the supporting base rotate relatively.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air springs, and in particular to an air spring shock absorber and a sliding structure thereof. Background Art

[0002] During the movement of the suspension, such as wheel swing, reverse wheel hop, and lateral force on the wheel, the sliding column system will generate torsional torque due to the action of the suspension rod system. For the air spring, a special torsional structure is required to withstand the torsional torque to prevent the force from being directly transmitted to the air spring bladder and the suspension rubber bushing, thereby affecting the durability of the air spring and the suspension rubber bushing.

[0003] In the related art, by utilizing a low torsional stiffness elastic damping integrated air spring assembly with a metal gasket and an anti-wear gasket, the metal gasket and the anti-wear gasket can rotate relative to each other when subjected to torsion, which can solve the use requirements of the sliding column system generated by the suspension movement. It avoids excessive load on components such as the empty spring bag skin and the suspension bushing, thereby affecting the durability of the components. However, this solution does not solve the problem of abnormal friction noise when the piston and the tray rotate relative to each other, that is, the abnormal friction noise between the metal gasket and the anti-wear gasket, and under this structural design, the grease is easily squeezed out or can only remain in the trapezoidal groove, which has a poor lubrication effect on the mating surface. Utility Model Content

[0004] Based on the above technical problems, the purpose of the present disclosure is to provide an air spring shock absorber and its sliding structure, the sliding structure of the air spring shock absorber can reduce the friction noise generated when the piston and the support seat rotate relative to each other, so as to at least partially solve the above technical problems.

[0005] In order to achieve the above-mentioned objectives, the first aspect of the present disclosure provides a sliding structure of an empty spring shock absorber, comprising a piston, a shock absorber and a support seat, the shock absorber being sleeved in the piston, and the support seat being connected to the outer wall of the shock absorber; the sliding structure of the empty spring shock absorber also includes a positioning assembly arranged between the piston and the support seat, the positioning assembly including a first annular positioning member connected to the support seat, and a second annular positioning member connected to the piston, at least one of the first annular positioning member and the second annular positioning member is provided with a protrusion, and the protrusion abuts against the other of the first annular positioning member and the second annular positioning member.

[0006] Optionally, the first annular positioning member is formed with a first annular protrusion; the second annular positioning member is formed with a second annular protrusion; the second annular protrusion abuts against the first gap between the two first annular protrusions; the first annular protrusion abuts against the second gap between the two second annular protrusions.

[0007] Optionally, the cross-sectional width of the second annular protrusion is smaller than the width of the first gap, and the cross-sectional width of the first annular protrusion is smaller than the width of the second gap, so as to form an oil storage space between the first annular protrusion and the second annular protrusion.

[0008] Optionally, the cross section of the first annular protrusion is configured as an arc-shaped protrusion toward the second annular positioning member; and / or the cross section of the second annular protrusion is configured as an arc-shaped protrusion toward the first annular positioning member.

[0009] Optionally, the arc-shaped protrusion is semicircular.

[0010] Optionally, the distance between any two adjacent first annular protrusions is greater than the diameter of the second annular protrusion; and / or the distance between any two adjacent second annular protrusions is greater than the diameter of the first annular protrusion.

[0011] Optionally, the first annular positioning member is configured as an annular gasket.

[0012] Optionally, the support seat is constructed as an L-shaped seat.

[0013] The second annular positioning member is constructed as a positioning ring with an L-shaped cross section. The inner ring of the positioning ring is loosely fitted in the L-shaped seat, and the outer ring of the positioning ring is connected to the inner side wall of the piston.

[0014] Optionally, the sliding structure of the air spring shock absorber further includes a sealing ring, which is located above the positioning ring and abuts against the inner wall of the piston and the outer wall of the support seat respectively.

[0015] Optionally, the first annular positioning member is made of nylon material, and the second annular positioning member is made of polytetrafluoroethylene material.

[0016] According to a second aspect of the present disclosure, an air spring shock absorber is provided, comprising an air spring body and a sliding structure of the air spring shock absorber. The sliding structure of the air spring shock absorber adopts the sliding structure of the air spring shock absorber described in any of the above-mentioned optional schemes.

[0017] Through the above technical solution, that is, the sliding structure of the air spring shock absorber provided by the present invention, when bearing the torsional torque generated by the sliding column system, the torsional torque can be borne by the relative rotation of the piston and the support seat. When the piston and the support seat rotate relative to each other, the first annular positioning member and the second annular positioning member arranged between the piston and the support seat can also rotate relative to each other, and at least one of the first annular positioning member and the second annular positioning member is provided with a protrusion. When relative rotation occurs, the protrusion provided on one of them will abut against the surface of the other. Compared with the existing technology, this abutment method can significantly reduce the contact area of ​​the first annular positioning member and the second annular positioning member, and thus reduce the friction between the first annular positioning member and the second annular positioning member, thereby reducing the abnormal noise generated by the relative rotation of the piston and the support seat.

[0018] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0020] Figure 1 is a schematic structural diagram of an air spring shock absorber provided in an exemplary embodiment of the present disclosure;

[0021] Figure 2 is a structural schematic diagram of a sliding structure of an empty spring shock absorber provided in an exemplary embodiment of the present disclosure;

[0022] Figure 3 is a schematic structural diagram of a second annular positioning member provided in an exemplary embodiment of the present disclosure;

[0023] Figure 4 is a schematic diagram of the bottom side structure of a second annular positioning member provided in an exemplary embodiment of the present disclosure;

[0024] Figure 5 is a schematic structural diagram of a first annular positioning member provided in an exemplary embodiment of the present disclosure;

[0025] Figure 6 2 is a schematic diagram of the bottom structure of the first annular positioning member provided in an exemplary embodiment of the present disclosure.

[0026] Description of Reference Numerals

[0027] 1-piston; 2-shock absorber; 3-support seat; 4-positioning assembly; 410-first annular positioning member; 411-first annular protrusion; 420-second annular positioning member; 421-second annular protrusion; 5-sealing ring. DETAILED DESCRIPTION

[0028] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0029] In this disclosure, unless otherwise stated, directional words such as "up, down, left, right" generally refer to Figure 1 or Figure 2 In the drawings, “up”, “down”, “left” and “right” refer to the inside and outside relative to the outline of the structure or component itself, and “first” and “second” are used to distinguish one element from another and do not have order or importance. In addition, the same figure marks in different reference drawings represent the same elements.

[0030] During the movement of the suspension, such as wheel swing, reverse wheel hop, and lateral force on the wheel, the sliding column system will generate torsional torque due to the action of the suspension rod system. For the air spring, a special torsional structure is required to withstand the torsional torque to prevent the force from being directly transmitted to the air spring bladder and the suspension rubber bushing, thereby affecting the durability of the air spring and the suspension rubber bushing. In the related art, the Chinese invention patent application with application number CN202210533925.7 discloses a low torsional stiffness spring-damped integrated air spring assembly. This solution utilizes metal gaskets and anti-wear gaskets to rotate relative to each other when subjected to torsion, which solves the use requirements of the sliding column system generated by the suspension movement with a small rotation angle, and avoids excessive load on components such as the empty spring bag skin and the suspension bushing, thereby affecting the durability of the components. However, this solution does not solve the problem of friction noise when the piston and the tray rotate relative to each other, that is, the friction noise between the metal gasket and the anti-wear gasket, and under this structural design, the grease is easily squeezed out or can only remain in the trapezoidal groove, which has a poor lubrication effect on the mating surface.

[0031] Based on the above technical problems, the first aspect of the present disclosure provides a sliding structure of an empty spring shock absorber, referring to Figures 2 to 6 As shown, the sliding structure of the air spring shock absorber includes a piston 1, a shock absorber 2 and a support seat 3, the shock absorber 2 is arranged in the piston 1, and the support seat 3 is connected to the outer wall of the shock absorber 2. The sliding structure of the air spring shock absorber also includes a positioning assembly 4 arranged between the piston 1 and the support seat 3, the positioning assembly 4 includes a first annular positioning member 410 connected to the support seat 3, and a second annular positioning member 420 connected to the piston 1, at least one of the first annular positioning member 410 and the second annular positioning member 420 is provided with a protrusion, and the protrusion abuts against the other of the first annular positioning member 410 and the second annular positioning member 420.

[0032] Through the above technical solution, the sliding structure of the air spring shock absorber provided by the present invention can withstand the torsional torque generated by the sliding column system through the relative rotation of the piston 1 and the support seat 3. When the piston 1 and the support seat 3 rotate relative to each other, the first annular positioning member 410 and the second annular positioning member 420 arranged between the piston 1 and the support seat 3 can also rotate relative to each other, and at least one of the first annular positioning member 410 and the second annular positioning member 420 is provided with a protrusion. When relative rotation occurs, the protrusion provided on one of them will abut against the surface of the other. Compared with the existing technology, this abutment method can significantly reduce the contact area of ​​the first annular positioning member 410 and the second annular positioning member 420, and can reduce the contact interlocking caused by the unevenness or protrusion of the contact surface, thereby reducing the friction between the first annular positioning member 410 and the second annular positioning member 420, thereby reducing the abnormal noise generated by the relative rotation of the piston 1 and the support seat 3.

[0033] It should be noted that the raised portion can also be provided on both the first annular positioning member 410 and the second annular positioning member 420. When the first annular positioning member 410 rotates relative to the second annular positioning member 420, the raised portion on the first annular positioning member 410 can abut against the surface of the second annular positioning member 420, and the raised portion on the second annular positioning member 420 can abut against the surface of the first annular positioning member 410, or the raised portions on the first annular positioning member 410 and the second annular positioning member 420 can abut against each other, both of which can reduce the contact area and reduce the abnormal noise caused by friction. The present disclosure is not limited to this. For example, refer to Figure 1 As shown, in one embodiment of the present disclosure, the first annular positioning member 410 is formed with a first annular protrusion 411; the second annular positioning member 420 is formed with a second annular protrusion 421; the second annular protrusion 421 abuts against the first gap between the two first annular protrusions 411, and the first annular protrusion 411 abuts against the second gap between the two second annular protrusions 421. In this way, the number of the first annular protrusion 411 and the second annular protrusion 421 is multiple, and when the first annular positioning member 410 and the second annular positioning member 420 cooperate with each other, the first annular protrusion 411 abuts against the second gap and the second annular protrusion 421 abuts against the first gap. On the basis of reducing the contact area, a limit can be formed between the first annular protrusion 411 and the second annular protrusion 421. In this way, when the first annular positioning member 410 rotates relative to the second annular positioning member 420, the first annular positioning member 410 can be rotated more stably relative to the second annular positioning member 420 through the limit of the first annular protrusion 411 and the second annular protrusion 421, so that the two positioning members will not be disengaged from each other, thereby improving the stability during the relative rotation under torsional torque.

[0034] In some embodiments, reference Figure 2 As shown, the cross-sectional width of the second annular protrusion 421 is smaller than the width of the first gap, and the cross-sectional width of the first annular protrusion 411 is smaller than the width of the second gap, so as to form an oil storage space between the first annular protrusion 411 and the second annular protrusion 421. In this way, when the first annular locating member 410 is matched with the second annular locating member 420, the oil storage space formed between the staggered first annular protrusions 411 and the second annular protrusions 421 can more stably store grease between the first annular locating member 410 and the second annular locating member 420, thereby providing long-term and stable lubrication for the mating surfaces. At the same time, it can also reduce the friction noise generated when the piston 1 and the support seat 3 rotate relative to each other. Moreover, when the first annular locating member 410 rotates relative to the second annular locating member 420, the grease can be stably stored in the oil storage space, thereby reducing the loss of grease.

[0035] In some embodiments, reference Figure 2 As shown, the cross section of the first annular protrusion 411 is configured as an arcuate protrusion toward the second annular positioning member 420; and / or, the cross section of the second annular protrusion 421 is configured as an arcuate protrusion toward the first annular positioning member 410. In this way, configuring the first annular protrusion 411 and the second annular protrusion 421 as an arcuate protrusion can further reduce the contact area between the first annular positioning member 410 and the second annular positioning member 420, further reducing the friction noise generated when the first annular positioning member 410 rotates relative to the second annular positioning member 420, and can indirectly increase the volume of the oil storage space between the first annular protrusion 411 and the second annular protrusion 421, so as to store more grease, thereby providing long-term lubrication.

[0036] In some embodiments, reference Figure 2 As shown, the arc-shaped protrusion is semicircular. In this way, the semicircular arc-shaped protrusion can further reduce the amount of oil storage space occupied when the first annular positioning member 410 and the second annular positioning member 420 cooperate with each other. That is, when the first annular positioning member 410 and the second annular positioning member 420 cooperate with each other, the semicircular arc-shaped protrusion can be tangent to the contact surface of the first gap or the second gap. In this way, more grease can be stored in the oil storage space to lubricate the first annular positioning member 410 and the second annular positioning member 420 when they rotate relative to each other.

[0037] In some embodiments, reference Figure 2As shown, the distance between any two adjacent first annular protrusions 411 is greater than the diameter of the second annular protrusion 421; and / or, the distance between any two adjacent second annular protrusions 421 is greater than the diameter of the first annular protrusion 411. In this way, when the first annular positioning member 410 and the second annular positioning member 420 cooperate with each other, the first annular protrusion 411 can be completely embedded between the two adjacent second annular protrusions 421, and the second annular protrusion 421 can also be completely embedded between the two adjacent first annular protrusions 411. This is not only conducive to the formation of the oil storage space, but also can reduce the mutual friction between the first annular protrusion 411 and the second annular protrusion 421 when the first annular positioning member 410 cooperates with the second annular positioning member 420, and can further reduce friction noise.

[0038] In some embodiments, reference Figures 2 to 6 As shown, the first annular positioning member 410 is constructed as an annular gasket, the support seat 3 is constructed as an L-shaped seat, and the second annular positioning member 420 is constructed as a positioning ring with an L-shaped cross section. The inner ring of the positioning ring is loosely fitted in the L-shaped seat, and the outer ring of the positioning ring is connected to the inner side wall of the piston 1. In this way, when the first annular positioning member 410 and the second annular positioning member 420 rotate relative to each other, Figure 1 As shown, the upper surface of the annular gasket will come into contact with the lower surface of the positioning ring. At the same time, the multiple first annular protrusions 411 will also abut against the lower surface of the positioning ring, and the multiple second annular protrusions 421 will also abut against the upper surface of the annular gasket. When subjected to torsional torque, the positioning ring and the annular gasket can form a smaller contact area, thereby reducing the abnormal noise generated during rotation.

[0039] It should be noted that the fixing method between the annular gasket and the support seat 3, as well as the fixing method between the positioning ring and the piston 1 can be any suitable method. For example, the annular gasket and the support seat 3 can be fixed by gluing or a limiting structure, and the positioning ring and the piston 1 can also be fixed by gluing or a limiting structure. This disclosure does not make specific restrictions on this.

[0040] In some embodiments, reference Figure 2 As shown, the sliding structure of the air spring shock absorber further includes a sealing ring 5, which is located above the positioning ring and respectively abuts against the inner wall of the piston 1 and the outer wall of the support seat 3. In this way, the sealing ring 5 can seal between the support seat 3, the piston 1 and the second annular positioning member 420.

[0041] In some embodiments, reference Figures 2 to 6As shown, the first annular locating member 410 is made of nylon material, and the second annular locating member 420 is made of polytetrafluoroethylene material. In this way, the first annular locating member 410 made of nylon material has sufficient compressive strength to avoid being crushed during the continuous fluctuation of the air spring shock absorber. At the same time, the nylon material also has certain self-lubricating properties, which can play a certain role in reducing friction and lubricating when sliding friction occurs between the first annular locating member 410 and the second annular locating member 420. The second annular locating member 420 made of polytetrafluoroethylene also has strong compressive strength, self-lubricating properties and thermal stability. Even when relative rotation occurs above 40°C or below -20°C, it can still play a certain role in reducing friction and lubricating.

[0042] In other embodiments, the first annular positioning member 410 and the second annular positioning member 420 may also be made of other suitable materials, for example, they may be made of POM (polyoxymethylene) or EPB (high-strength alloy steel), which is not limited in the present disclosure.

[0043] In a second aspect of the present disclosure, there is provided an empty spring shock absorber, referring to Figure 1 As shown, the air spring shock absorber includes an air spring body and a sliding structure. This sliding structure exhibits all the beneficial effects of the aforementioned embodiments. When the sliding structure of the air spring shock absorber withstands the torsional torque generated by vehicle yaw, reverse wheel hop, and lateral force on the wheel, it can significantly reduce friction noise. Furthermore, the air spring shock absorber is better lubricated with grease, which can also prevent grease loss.

[0044] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0045] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0046] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A sliding structure of an air spring shock absorber, characterized in that: It includes a piston, a shock absorber and a support seat, wherein the shock absorber is sleeved in the piston, and the support seat is connected to the outer side wall of the shock absorber; The sliding structure of the air spring shock absorber also includes a positioning assembly arranged between the piston and the support seat, the positioning assembly includes a first annular positioning member connected to the support seat, and a second annular positioning member connected to the piston, at least one of the first annular positioning member and the second annular positioning member is provided with a protrusion, and the protrusion abuts against the other of the first annular positioning member and the second annular positioning member.

2. The sliding structure of the air spring shock absorber according to claim 1, characterized in that: The first annular positioning member is formed with a first annular protrusion; The second annular positioning member is formed with a second annular protrusion; The second annular protrusion abuts against a first gap between two of the first annular protrusions; the first annular protrusion abuts against a second gap between two of the second annular protrusions.

3. The sliding structure of the air spring shock absorber according to claim 2 is characterized in that: The cross-sectional width of the second annular protrusion is smaller than the width of the first gap, and the cross-sectional width of the first annular protrusion is smaller than the width of the second gap, so as to form an oil storage space between the first annular protrusion and the second annular protrusion.

4. The sliding structure of the air spring shock absorber according to claim 3 is characterized in that: The cross section of the first annular protrusion is configured as an arc-shaped protrusion toward the second annular positioning member; and / or, A cross section of the second annular protrusion is configured as an arc-shaped protrusion toward the first annular positioning member.

5. The sliding structure of the air spring shock absorber according to claim 4, characterized in that: The arc-shaped protrusion is semicircular.

6. The sliding structure of the air spring shock absorber according to claim 5, characterized in that: The distance between any two adjacent first annular protrusions is greater than the diameter of the second annular protrusion; and / or, The distance between any two adjacent second annular protrusions is greater than the diameter of the first annular protrusion.

7. The sliding structure of the air spring shock absorber according to claim 6, characterized in that: The first annular positioning member is configured as an annular gasket.

8. The sliding structure of the air spring shock absorber according to any one of claims 1 to 7, characterized in that: The support seat is constructed as an L-shaped seat. The second annular positioning member is constructed as a positioning ring with an L-shaped cross section, the inner ring of the positioning ring is loosely fitted in the L-shaped seat, and the outer ring of the positioning ring is connected to the inner side wall of the piston.

9. The sliding structure of the air spring shock absorber according to claim 8, characterized in that: The sliding structure of the air spring shock absorber also includes a sealing ring, which is located above the positioning ring and abuts against the inner wall of the piston and the outer wall of the support seat respectively.

10. The sliding structure of the air spring shock absorber according to claim 1, characterized in that: The first annular positioning member is made of nylon material, and the second annular positioning member is made of polytetrafluoroethylene material.

11. An empty spring shock absorber, comprising an empty spring body and a sliding structure of the empty spring shock absorber, characterized in that: The sliding structure of the air spring shock absorber adopts the sliding structure of the air spring shock absorber as described in any one of claims 1-10.

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