Integrated air spring

Abstract

The utility model discloses an integrated air spring which comprises a rotary cover and a piston, a groove matched with a piston body is formed in the rotary cover, an L-shaped antifriction pad is arranged in the groove, the antifriction pad can cover the matching face of the piston body and the groove, a groove is formed in the antifriction pad, and lubricant is coated in the groove. According to the rotary cover, the L-shaped anti-friction pad is arranged in the groove and can cover the whole matching surface of the piston body and the groove, and meanwhile, the groove is formed in the anti-friction pad and is coated with the lubricant, so that the friction between the rotary cover and the piston is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air springs, and more specifically to an integrated air spring. Background Art

[0002] See also Figure 1 The air spring is surrounded by many parts to form a closed space. During the working process, the air is compressed to generate elastic force. It includes the original rotating cover 1, bearing 2, piston 3, piston section block 4, air nozzle 5, upper end a of the rotating cover, and lower end mounting seat b of the air spring; wherein, the lower end mounting seat b of the air spring is connected to the unsprung mass, and the upper end a of the rotating cover is connected to the sprung mass. When the wheel bounces, the lower end and the upper end of the air spring are driven to rotate relative to each other, so a bearing 2 is provided. The bearing 2 is arranged in the middle of the groove of the original rotating cover 1 and the piston 3. However, the three parts are easy to separate and fall off when they are assembled but not assembled to the vehicle body, and are not easy to be assembled between the vehicle body and the lower swing arm; at the same time, the piston 3 is connected to the piston section block 4 by press fit. The outer surface of the piston section block 4 has an undulating curve. The bladder is close to this surface when working, and the piston cross-sectional curve controls the change of the stiffness of the air spring.

[0003] See also Figure 2 The intermediate bearing is sealed by the upper shell 6, the friction-reducing pad 7, and the lower shell 8. It bears the axial load and rotates. However, the redundant setting of the upper shell 6 and the lower shell 8 makes it unable to bear the lateral force. During operation, the friction between the cylindrical surfaces of the upper shell 6 and the lower shell 8 will also generate noise. Utility Model Content

[0004] The technical problem to be solved by the utility model is how to reduce the friction between the rotating cover and the piston.

[0005] The utility model solves the above technical problems through the following technical means: an integrated air spring, including a rotating cover and a piston, the rotating cover is provided with a groove matched with the piston body, an L-shaped anti-friction pad is provided in the groove, the anti-friction pad can cover the matching surface between the piston body and the groove, the anti-friction pad is provided with a groove, and a lubricant is coated in the groove.

[0006] An L-shaped anti-friction pad is arranged in the groove and covers the entire matching surface between the piston body and the groove, and a groove is formed on the pad and lubricant is applied thereon, thereby reducing the friction between the rotating cover and the piston.

[0007] As a preferred technical solution, the friction-reducing pad includes a vertical section and a horizontal section, one end of the vertical section abuts against the piston, the other end is fixedly connected to one end of the horizontal section, and the other end of the horizontal section abuts against the inner wall of the groove.

[0008] As a preferred technical solution, the other end of the horizontal section is also connected to the inner wall of the groove through a sealing gasket, and one end of the vertical section is against the piston through a sealing gasket.

[0009] As a preferred technical solution, a buckle is provided on the circumferential edge of the rotating cover, a hook is provided on the bottom of the buckle, and a first flange matched with the buckle is provided on the outer edge of the upper end of the piston.

[0010] As a preferred technical solution, an annular protrusion is provided at the inner bottom of the piston, a receiving groove is formed below the plane where the bottom of the annular protrusion is located, and a second flange adapted to the receiving groove is formed at the bottom of the rotating cover.

[0011] As a preferred technical solution, the two sides of the vertical section are respectively connected to the circumferential inner wall of the groove and the outer wall of one side of the piston, and the top and bottom of the horizontal section are respectively connected to the top inner wall of the groove and the top of the piston.

[0012] As a preferred technical solution, the vertical section and the horizontal section are fixed vertically.

[0013] As a preferred technical solution, an annular protrusion is fixedly connected to the inner wall of the piston, the protrusion is located below the plane where the bottom of the groove is located, and its ring width is larger than the gap between the inner wall of the piston and the inner wall of the groove.

[0014] As a preferred technical solution, the buckle is a circumferentially closed annular frame with an opening in the middle.

[0015] As a preferred technical solution, the hook extends toward the axis of the rotating cover, and a gap is left between the end surface of the first flange and the buckle.

[0016] The beneficial effects of the utility model are:

[0017] (1) In the present invention, an L-shaped friction-reducing pad is arranged in the groove so as to cover the entire mating surface between the piston body and the groove, and a groove is formed on the L-shaped friction-reducing pad and a lubricant is applied thereon, thereby reducing the friction between the rotating cover and the piston.

[0018] (2) In the present invention, the number of parts can be reduced by removing the bearing housing parts such as the upper housing and the lower housing and integrating them with the empty spring parts into the rotating cover and the piston to form an integrally formed structure.

[0019] (3) In the present invention, the first flange, the buckle and the hook of the buckle are arranged to prevent the rotating cover, the friction-reducing pad and the piston from falling off during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the cross-sectional structure of an air spring provided as the background technology of the utility model;

[0021] Figure 2 A schematic diagram of a groove cross-section structure provided as the background technology of the utility model;

[0022] Figure 3 A schematic diagram of a groove cross-sectional structure provided in Example 1 of the utility model;

[0023] Figure 4 A schematic diagram of a groove cross-sectional structure provided in Example 2 of the utility model;

[0024] Figure 5 A schematic diagram of the cross-sectional structure of a rotating cover provided in Example 1 of the utility model;

[0025] Figure 6 A schematic diagram of the cross-sectional structure of a rotating cover provided in Example 2 of the utility model;

[0026] Figure numbers: 1, original rotating cover; 2, bearing; 3, piston; 4, piston section block; 5, air nozzle; 6, upper shell; 7, wear-reducing plate; 8, lower shell; 9, rotating cover; 10, wear-reducing pad; 11, sealing gasket; 12, first flange; 13, buckle; 14, annular protrusion; 15, second flange; a, upper end of rotating cover; b, mounting seat at the lower end of air spring. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example 1

[0029] See also Figure 3 , an integrated air spring, comprising a rotating cover 9, a piston body 3, and a friction-reducing pad 10. A friction-reducing pad 10 is arranged in the matching gap between the rotating cover 9 and the piston body 3. The friction-reducing pad 10 is arranged in an L-shape, and the friction-reducing pad 10 comprises a horizontal section and a vertical section. A groove adapted to the piston body 3 is provided on the rotating cover 9, and the piston body 3 can extend into the groove and is connected to the rotating cover 9 through the friction-reducing pad 10. One end of the horizontal section is fixedly connected to one end of the vertical section, and a sealing gasket 11 is arranged between the other end and the inner wall of the docking groove, and a sealing gasket 11 is also arranged between the other end of the vertical section and the piston body 3. A groove is also arranged on the friction-reducing pad 10, and a lubricant is coated in the groove. In this embodiment, the lubricant is grease, and of course it can be other commercially available lubricants or water, etc.; the sealing gasket 11 prevents the leakage of the lubricant, and also reduces the friction, thereby avoiding the noise generated by the friction between the cylindrical surface of the upper shell 6 and the lower shell 8;

[0030] See also Figure 2In this embodiment, the original upper shell 6 and the lower shell 8 are reduced, the number of parts is reduced, and the cost is reduced. It is equivalent to integrating the original upper shell 6 and the original rotating cover 1 to form an integral structure, and integrating the original lower shell 8 onto the piston 3 to form an integral structure.

[0031] See also Figure 3 , Figure 5 A buckle 13 is provided on the circumferential edge of the rotating cover 9, and a first flange 12 matched with the buckle 13 is provided on the outer edge of the upper end of the piston 3. The buckle 13 is an annular frame structure with an opening in the middle to facilitate checking whether the buckle at the bottom of the buckle is engaged with the first flange 12. The buckle 13 has a certain elasticity, so the hook at the bottom of the buckle 13 can be buckled and connected with the first flange 12, thereby solving the problem that the rotating cover, the bearing and the piston are easy to fall off, wherein the hook and the first flange 12 constitute a docking limit structure.

[0032] It should be noted that, in this embodiment, the axial force is upward along the piston axis, the radial force is extended along the piston axis toward its outer edge and is perpendicular to the axial direction, and the load force is located in the hypotenuse direction of the triangle formed by the axial force and the radial force, and is set obliquely downward.

[0033] Example 2

[0034] The difference between this embodiment and the first embodiment is that another docking limiting structure is added on the basis of the buckle 13 and the first flange 12 in the first embodiment, so as to improve the limiting effect of the three.

[0035] See also Figure 4 , Figure 6 The piston 3 is also docked with the rotating cover 9 through another docking limit structure, and the docking limit structure includes an annular protrusion 14 and a second flange 15. An annular protrusion 14 is formed on the inner side of the piston 3, and the annular protrusion 14 forms an inner buckle. A receiving groove adapted to the second flange 15 is formed below the plane where the bottom of the annular protrusion 14 is located. When installing, the second flange 15 at the bottom of the rotating cover 9 is buckled and connected with the receiving groove.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated air spring, comprising a rotating cover and a piston, wherein the rotating cover is provided with a groove adapted to the piston body, characterized in that: An L-shaped anti-friction pad is arranged in the groove, and the anti-friction pad can cover the matching surface between the piston body and the groove. A groove is opened on the anti-friction pad, and a lubricant is coated in the groove.

2. An integrated air spring according to claim 1, characterized in that: The anti-friction pad comprises a vertical section and a horizontal section, one end of the vertical section abuts against the piston, the other end of the vertical section is fixedly connected to one end of the horizontal section, and the other end of the horizontal section abuts against the inner wall of the groove.

3. An integrated air spring according to claim 2, characterized in that: The other end of the horizontal section is also connected to the inner wall of the groove through a sealing gasket, and one end of the vertical section is against the piston through a sealing gasket.

4. The integrated air spring according to claim 1, characterized in that: A buckle is provided on the circumferential edge of the rotating cover, a hook is provided on the bottom of the buckle, and a first flange matched with the buckle is provided on the outer edge of the upper end of the piston.

5. An integrated air spring according to claim 1 or 4, characterized in that: An annular protrusion is provided at the bottom of the inner side of the piston, a receiving groove is formed below the plane where the bottom of the annular protrusion is located, and a second flange matched with the receiving groove is formed at the bottom of the rotating cover.

6. The integrated air spring according to claim 2, characterized in that: The two sides of the vertical section are respectively connected to the circumferential inner wall of the groove and the outer wall of one side of the piston, and the top and bottom of the horizontal section are respectively connected to the top inner wall of the groove and the top of the piston.

7. The integrated air spring according to claim 2, characterized in that: The vertical section and the horizontal section are fixed vertically.

8. The integrated air spring according to claim 4, characterized in that: An annular protrusion is fixedly connected to the inner wall of the piston. The protrusion is located below the plane where the bottom of the groove is located, and its ring width is larger than the gap between the inner wall of the piston and the inner wall of the groove.

9. The integrated air spring according to claim 4, characterized in that: The buckle is a circumferentially closed annular frame with an opening in the middle.

10. The integrated air spring according to claim 4, characterized in that: The hook extends toward the axis of the rotating cover, and a gap is left between the first flange end surface and the buckle.

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