Air spring anti-yaw rotation stopping structure and air spring

Abstract

The utility model discloses an air spring anti -yaw rotation -stopping structure and air spring, including piston, shock absorber, the shock absorber is fixed with rotation -stopping piece no.

Description

Technical Field

[0001] This utility model relates to the field of air spring technology for passenger vehicles, and more specifically to an anti-sway and anti-rotation structure for an air spring and an air spring. Background Technology

[0002] In recent years, with the development of the automotive industry and the popularization of new energy vehicles, the application scenarios of automotive air suspension systems have become increasingly widespread, among which air springs are one of the key components of air suspension.

[0003] During vehicle operation, due to excessive torsional angle, air spring assemblies are equipped with one or more of the following: anti-rotation structure, anti-sway structure, and positioning structure. However, current structures all have some problems: they may be difficult to disassemble and assemble, produce abnormal noises, or be incompatible with multiple functions such as anti-sway and anti-rotation.

[0004] Furthermore, most air spring anti-rotation structures on the market are based on interference fits, which fundamentally affect the anti-rotation effect by increasing static friction, and are not suitable for situations with excessive torsion angles.

[0005] Patent document CN117646776A discloses an anti-rotation structure for an air spring assembly and an air spring assembly. The anti-rotation structure includes a piston, a first annular gasket, a second annular gasket, and a shock absorber outer cylinder. The first gasket centrally connects the piston and the second gasket. The shock absorber outer cylinder coaxially passes through the piston, the first gasket, and the second gasket, and is fixedly connected to the piston and the first gasket respectively. The piston is fixedly connected to the first gasket. The piston has a first end and a second end in the axial direction, and the second end is provided with at least one notch. The first gasket is circumferentially provided with at least one boss that engages with at least one of the notches. The connection positions of the first gasket and the second gasket are respectively provided with mating gears.

[0006] This solution can prevent the piston from twisting along with the first pad when the shock absorber twists. However, this anti-rotation structure uses two toothed rings that fit together vertically. When installed vertically, due to errors in the machining accuracy of the workpiece, the toothed rings are not perfectly aligned during installation. In addition, this structure is prone to wobbling when dealing with swaying conditions, thus limiting its anti-rotation effect. Utility Model Content

[0007] The technical problem to be solved by this utility model is how to provide a spring anti-rotation structure that is compatible with anti-sway and anti-rotation.

[0008] This utility model solves the above-mentioned technical problems through the following technical means: an air spring anti-sway and anti-rotation structure, including a piston and a shock absorber, with an anti-rotation component two fixed circumferentially on the shock absorber, and one end of the piston axially fixed to the anti-rotation component two through the anti-rotation component one. The anti-rotation component one and the anti-rotation component two are respectively provided with a toothed ring one and a toothed ring two, and the toothed ring two can be arranged on the outside of the toothed ring one and mesh with the teeth of the toothed ring one circumferentially.

[0009] As a preferred technical solution, the number of teeth on gear ring one is less than the number of teeth on gear ring two, or the number of teeth on gear ring one is greater than the number of teeth on gear ring two.

[0010] As a preferred technical solution, the bottom planes of gear ring one and gear ring two are coplanar, and the top plane of gear ring one is located above or below the top plane of gear ring two.

[0011] As a preferred technical solution, the shock absorber is provided with a connection platform that is compatible with the anti-rotation component 2. The anti-rotation component 2 is provided with a positioning pin at the end away from the piston, and a positioning groove that is compatible with the positioning pin is opened on the connection platform.

[0012] As a preferred technical solution, the anti-rotation component 2 is integrally formed with the connecting platform and the vibration damper, or the connecting platform and the anti-rotation component 2 are integrally formed.

[0013] As a preferred technical solution, the anti-rotation component 2 and the vibration damper are integrally formed.

[0014] As a preferred technical solution, the anti-rotation component 1 and the piston are interference fit, the inner wall of the anti-rotation component 1 is provided with at least one limiting boss, and the piston is provided with a limiting groove that matches the limiting boss.

[0015] As a preferred technical solution, the anti-rotation component is integrally formed with the piston.

[0016] As a preferred technical solution, one end of the piston is fixedly connected to the other end of the shock absorber in the axial direction.

[0017] As a preferred technical solution, a shock absorber protective cover is fixed to one end of the shock absorber away from the anti-rotation component, and the shock absorber protective cover is interference-fitted with the upper straight section of the piston.

[0018] As a preferred technical solution, the piston inner wall is provided with a lower straight section, which is located between anti-rotation component one and anti-rotation component two.

[0019] This utility model also provides an air spring, including the above-mentioned air spring anti-sway and anti-rotation structure.

[0020] The beneficial effects of this utility model are as follows:

[0021] (1) In this utility model, by setting anti-rotation component one and anti-rotation component two, and enabling gear ring two to be configured on the outside of gear ring one and mesh with the teeth of gear ring in a circumferential direction, this connection form of inner and outer meshing can improve the fastening effect of piston and damper. In the swaying condition, the teeth will not be separated due to external vibration. At the same time, it can also avoid the phenomenon of loose meshing due to workpiece error and installation deviation.

[0022] (2) In this utility model, by setting the number of teeth of the first gear ring and the second gear ring to be different, and by guiding the two gear rings through the draft surfaces, the assembly and positioning difficulty of the air spring sub-assembly and the damper sub-assembly can be reduced, and the disassembly and assembly difficulty of the air spring can be greatly reduced.

[0023] (3) In this utility model, by setting the bottom of the first gear ring and the second gear ring to be coplanar and the top of the gear ring not to be coplanar, additional matching space is provided for the relative vertical displacement of the first gear ring and the second gear ring, thereby improving the anti-sway effect.

[0024] (4) In this utility model, by interfering with the upper straight section of the piston and the shock absorber protective cover, and by the clearance fit between the lower straight section and the outer wall of the shock absorber, the relative position between the piston and the shock absorber can be fixed during the swinging process of the air spring, so as to prevent the piston and the shock absorber from swinging and generating abnormal noise.

[0025] (5) In this utility model, by treating the anti-rotation part one and the piston as two separate parts, and the anti-rotation part two, the damper and the spring plate as three separate parts, the processing difficulty is reduced. By treating the anti-rotation part one and the piston as one part, and the anti-rotation part two, the damper and the spring plate as one separate part, the strength of the parts is improved. Attached Figure Description

[0026] Figure 1 This is a schematic cross-sectional view of the anti-rotation structure provided in Embodiment 1 of this utility model;

[0027] Figure 2 A schematic diagram of the positioning slot structure of the spring disc provided in Embodiment 1 of this utility model;

[0028] Figure 3 This is a schematic diagram of the anti-rotation component two provided in Embodiment 1 of this utility model;

[0029] Figure 4 This is a schematic diagram of the two cross-sectional structures of the anti-rotation component provided in Embodiment 1 of this utility model;

[0030] Figure 5 This is a schematic diagram of the anti-rotation component provided in Embodiment 1 of this utility model;

[0031] Figure 6 This is a cross-sectional structural diagram of the anti-rotation component provided in Embodiment 1 of this utility model;

[0032] Figure 7 This is a schematic diagram of the structure after the anti-rotation component 2 and the anti-rotation component 1 are connected, as provided in Embodiment 1 of this utility model;

[0033] Figure 8 This is a schematic diagram of the cross-sectional structure of the vibration damper provided in Embodiment 1 of this utility model;

[0034] Figure 9 This is a schematic diagram of the piston structure provided in Embodiment 1 of this utility model;

[0035] Figure 10 This is a schematic diagram of the piston cross-sectional structure provided in Embodiment 1 of this utility model;

[0036] Figure 11 This is a partial structural diagram of a gear ring provided in Embodiment 1 of the present invention;

[0037] Figure 12 This is a partial structural diagram of the gear ring provided in Embodiment 1 of this utility model;

[0038] Reference numerals: 1. Shock absorber protective cover; 2. Piston; 21. Upper straight section; 22. Limiting groove; 23. Lower straight section; 3. Shock absorber; 4. Anti-rotation component one; 41. Limiting boss; 42. Gear ring one; 5. Anti-rotation component two; 51. Positioning pin; 52. Gear ring two; 53. Connecting section one; 54. Connecting section two; 55. Step; 6. Spring disc; 61. Positioning groove. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] Example 1

[0041] See Figure 1 , Figure 3 , Figure 5An air spring anti-sway and anti-rotation structure includes a damper protective cover 1, a piston 2, a damper 3, an anti-rotation component 4, an anti-rotation component 5, and a spring disc 6. The piston 2 has two axial ends, namely a first end and a second end. The damper 3 is provided with a connecting platform that can support the anti-rotation component 5 and install the anti-rotation component 5 through the connecting platform. The second end of the piston 2 is fixed to the anti-rotation component 5 through the anti-rotation component 4. The damper protective cover 1 is fixedly connected to the top of the damper 3. The first end of the piston 2 is interference-fitted with the damper protective cover 1. The anti-rotation component 5 is arranged in the circumference of the damper 3. The anti-rotation component 4 and the anti-rotation component 5 are respectively provided with a toothed ring 42 and a toothed ring 52. The toothed ring 52 can be arranged outside the toothed ring 42 and mesh with the circumferential teeth of the toothed ring 42, thereby achieving relative fixation of the toothed ring 42 and the toothed ring 52 and preventing relative rotation between the toothed ring 42 and the toothed ring 52.

[0042] See Figure 11 , Figure 12 The number of teeth on gear ring 1 42 and gear ring 2 52 is different. In this embodiment, the number of teeth on gear ring 2 52 is greater than the number of teeth on gear ring 1 42, and the number of teeth on gear ring 1 42 is greater than the number of teeth on gear ring 2 52. Both gear ring 1 42 and gear ring 2 52 have draft surfaces. The draft surfaces can reduce the difficulty of assembling and positioning the air spring sub-assembly and the shock absorber sub-assembly, and greatly reduce the difficulty of disassembling and assembling the air spring. When gear ring 1 42 and gear ring 2 52 are engaged, two teeth of gear ring 2 52 can be inserted between the adjacent teeth of gear ring 1 42.

[0043] It should be noted that after the anti-rotation component 4 is assembled with the piston 2, it forms a spring sub-assembly. The anti-rotation component 5 is fixed on the spring disc 6 to form a damper sub-assembly. The bottom planes of the gear ring 42 and the gear ring 52 are coplanar, and the top plane of the gear ring 42 is located above or below the top plane of the gear ring 52. This provides additional fitting space for the relative vertical displacement of the gear ring 42 and the gear ring 52, thereby improving the anti-sway effect.

[0044] See Figure 1 , Figure 10 The inner wall of piston 2 has two discontinuous straight sections, namely upper straight section 21 and lower straight section 23. Upper straight section 21 is interference-fitted with shock absorber protective cover 1. Lower straight section 23 is locked between anti-rotation component 1 4 and anti-rotation component 2 5, that is, it is connected and fastened to anti-rotation component 1 4 and anti-rotation component 2 5. Among them, lower straight section 23 of piston 2 is interference-fitted with anti-rotation component 1 4. By fixing both ends of piston 2, the piston 2 is prevented from swaying. Of course, this fixing can also be a small clearance fit.

[0045] See Figure 5 , Figure 6The inner wall of the anti-rotation component 4 is provided with at least one limiting protrusion 41. In this embodiment, two are used as an example, but there can also be three or other numbers. The limiting protrusion 41 has a ring structure. The piston 2 is provided with a limiting groove 22 that matches the limiting protrusion 41. A toothed ring 42 is fixedly connected to the outer wall of the anti-rotation component 4. The anti-rotation component 4 is inserted into the bottom of the piston 2. The limiting groove 22 limits the limiting protrusion 41, thereby preventing the rotation of the anti-rotation component 4 and the piston 2.

[0046] See Figure 2 , Figure 3 , Figure 4 The anti-rotation component 5 includes a first connecting section 53, a second connecting section 54, a positioning pin 51, and a second gear ring 52. The first connecting section 53 and the second connecting section 54 are fixedly connected, or they can be integrally formed. In this embodiment, the first connecting section 53 is a vertical section arranged in a ring shape, and the second connecting section 54 is a horizontal section. The end of the second connecting section 54 facing away from the piston 2 is provided with a positioning pin 51. A positioning slot 61 adapted to the positioning pin 51 is opened on the connecting platform. In this embodiment, the shock absorber 3 is circumferentially fixed with a spring disc 6, and two positioning slots 6 are provided. 1. A positioning slot 61 is formed on the spring disc 6. It can be circular, rectangular or other shapes. A gear ring 52 is fixed at the end of the connecting section 2 54 facing the piston 2. The connecting section 2 54 is provided with a step 55 around its circumference, which can match other parts of the air spring. After the positioning pin 51 is inserted into the positioning slot 61, the anti-rotation part 2 5 and the shock absorber 3 are assembled. The anti-rotation part 1 4 and the piston 2 are inserted coaxially towards the anti-rotation part 2 5. After the teeth of the gear ring 2 52 are inserted between the teeth of the gear ring 1 42, the air spring sub-assembly and the shock absorber sub-assembly are assembled.

[0047] See Figure 1 , Figure 7 , Figure 8 The anti-rotation component 2 5, spring disc 6, and damper 3 can be integrally formed, or the spring disc 6 and anti-rotation component 2 5 can be integrally formed. Alternatively, the anti-rotation component 2 5 and damper 3 can be integrally formed, and the anti-rotation component 1 4 and piston 2 can be integrally formed. They can also be fixedly connected or interference-fitted. Treating the anti-rotation component 1 4 and piston 2 as two separate parts, and the anti-rotation component 2 5, damper 3, and spring disc 6 as three separate parts, reduces the difficulty of processing. Treating the anti-rotation component 1 4 and piston 2 as one part, and the anti-rotation component 2 5, damper 3, and spring disc 6 as a separate part, improves the strength of the parts.

[0048] Example 2

[0049] The difference between this embodiment and the previous embodiment is that this embodiment also provides an air spring including the air spring anti-sway and anti-rotation structure of embodiment 1.

[0050] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An air spring anti-sway and anti-rotation structure, comprising a piston and a shock absorber, characterized in that, The shock absorber is circumferentially fixed with an anti-rotation component two. One end of the piston is fixed axially to the anti-rotation component two through the anti-rotation component one. The anti-rotation component one and the anti-rotation component two are respectively provided with a gear ring one and a gear ring two, and the gear ring two can be arranged outside the gear ring one and mesh with the teeth of the gear ring one circumferentially.

2. The air spring anti-sway and anti-rotation structure according to claim 1, characterized in that, The planes at the bottom of gear ring 1 and gear ring 2 are coplanar, and the plane at the top of gear ring 1 is located above or below the plane at the top of gear ring 2.

3. The air spring anti-sway and anti-rotation structure according to claim 1, characterized in that, The shock absorber is equipped with a connecting platform that is compatible with the anti-rotation component 2. The anti-rotation component 2 has a positioning pin at the end away from the piston, and the connecting platform has a positioning slot that is compatible with the positioning pin.

4. The air spring anti-sway and anti-rotation structure according to claim 3, characterized in that, The anti-rotation component 2 is integrally formed with the connecting platform and the vibration damper, or the connecting platform and the anti-rotation component 2 are integrally formed.

5. The air spring anti-sway and anti-rotation structure according to claim 1, characterized in that, The anti-rotation component 2 is integrally formed with the vibration damper.

6. The air spring anti-sway and anti-rotation structure according to claim 1, characterized in that, The anti-rotation component 1 is interference-fitted with the piston. The inner wall of the anti-rotation component 1 is provided with at least one limiting boss, and the piston is provided with a limiting groove that matches the limiting boss.

7. The air spring anti-sway and anti-rotation structure according to claim 1, characterized in that, The anti-rotation component is integrally formed with the piston.

8. The air spring anti-sway and anti-rotation structure according to claim 1, characterized in that, One end of the piston is fixedly connected to the other end of the shock absorber along the axial direction.

9. The air spring anti-sway and anti-rotation structure according to claim 1, characterized in that, A shock absorber protective cover is fixed to one end of the shock absorber away from the anti-rotation component, and the shock absorber protective cover is interference-fitted with the upper straight section of the piston.

10. An air spring, characterized in that, Including an air spring anti-sway and anti-rotation structure as described in any one of claims 1-9.

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