Air spring piston and air spring

Abstract

The utility model discloses an air spring piston and an air spring. The air spring piston comprises a piston body and a first buffer piece, and the first buffer piece is arranged on the end face, connected with a protective cover, in the piston body. According to the air spring, through the arrangement of the first buffering piece, buffering can be provided for collision between the piston and the protective cover, and abnormal sound caused by collision between the piston and the protective cover in the whole vehicle movement process of the air spring can be avoided; and through the arrangement of the buffer part II, a gap between the lower end of the piston and the shock absorber can be filled up to provide support for the shock absorber, and the problems that the shock absorber is not supported and the deflection angle is too large in the whole vehicle movement process of the air spring are solved.

Description

Technical Field

[0001] This utility model relates to the field of air spring technology, and more specifically to an air spring piston and an air spring. Background Technology

[0002] The piston is one of the main components of an air spring. It has a certain volume space, is assembled in the middle of the air spring, provides the piston profile required for the working of the bladder, connects the bladder and the shock absorber, and transmits the load.

[0003] See Figure 1 In the prior art, piston 1 is made entirely of aluminum or plastic. For ease of installation, the upper inner ring of piston 1 has a clearance fit with the protective cover 3, with a relatively large clearance on one side. The lower end fits with the shock absorber 4. (See reference...) Figure 2 Because piston 1 has a long straight section, it is prone to vertical vibration, swaying, and torsion during the movement of the air spring vehicle. The swaying of shock absorber 4 can easily cause the protective cover to collide with the upper end of the piston, producing abnormal noise. At the same time, the lower straight section of piston 3 is long, and the support surface for shock absorber 4 is short, which can easily cause the swaying angle of shock absorber 4 to be too large, resulting in abnormal noise from the upper end of piston 3 colliding with the protective cover, affecting the ride comfort. The bottom of shock absorber 4 is connected to a positioning ring 7, and the connection end between positioning ring 7 and the lower end of piston 1 is equipped with a sealing ring 8.

[0004] In addition, frequent impacts can cause slight deformation of the protective cover 3 and piston 1, or even breakage or debris in the protective cover 3. This reduces the service life of the two parts and can easily cause the debris to cause the bladder 5 to fail, the air spring to leak air, and the vehicle to malfunction, increasing the later maintenance costs. Utility Model Content

[0005] The technical problem to be solved by this invention is how to reduce piston noise.

[0006] This utility model solves the above-mentioned technical problems through the following technical means: an air spring piston, including a piston and a buffer component, wherein the buffer component is disposed inside the piston and connected to the end face of the protective cover.

[0007] As a preferred technical solution, the buffer component includes a rubber gasket or a plastic gasket and is fixedly connected to the inner wall of the piston.

[0008] As a preferred technical solution, the buffer element is vulcanized and connected to the inner wall of the piston.

[0009] As a preferred technical solution, the outer diameter of the buffer element is the same as the inner diameter of the piston, and the buffer element extends along the end face of the piston inner wall that is connected to the protective cover.

[0010] As a preferred technical solution, the buffer component is provided with ventilation holes.

[0011] As a preferred technical solution, the inner wall of the buffer component is provided with an annular groove, and the annular groove is filled with buffer material.

[0012] As a preferred technical solution, the inner wall of the piston is also provided with a positioning step that is compatible with the buffer.

[0013] As a preferred technical solution, the buffer component includes a fixedly connected axial section and a horizontal section, the axes of which are coaxial with the piston axis.

[0014] As a preferred technical solution, the connection end between the piston and the damper is further provided with a second buffer component, which is fixedly connected to the inner wall of the piston.

[0015] An air spring, comprising the aforementioned air spring piston.

[0016] The beneficial effects of this utility model are as follows:

[0017] (1) In this utility model, by setting the buffer component one, the impact between the piston and the protective cover can be buffered, which can solve the abnormal noise caused by the impact between the piston and the protective cover during the movement of the air spring.

[0018] (2) In this utility model, by setting the second buffer, the gap between the lower end of the piston and the shock absorber can be filled, providing support for it, and solving the problem that the shock absorber has no support and the sway angle is too large during the movement of the air spring. Attached Figure Description

[0019] Figure 1 A schematic diagram of the piston structure is provided for the background art of this utility model;

[0020] Figure 2 A schematic diagram of an air spring structure is provided for the background art of this utility model;

[0021] Figure 3 This is a schematic diagram of the piston structure provided in Embodiment 1 of this utility model;

[0022] Figure 4 This is a schematic diagram of the piston cross-sectional structure provided in Embodiment 1 of this utility model;

[0023] Figure 5 This is a top view schematic diagram of the piston structure provided in Embodiment 1 of this utility model;

[0024] Figure 6 This is a schematic diagram of the second buffer component provided in Embodiment 1 of this utility model;

[0025] Reference numerals: 1. Piston; 11. Positioning step; 2. Buffer component one; 21. Annular groove; 22. Vent hole; 3. Protective cover; 4. Shock absorber; 5. Blade; 6. Buffer component two; 7. Positioning ring; 8. Sealing ring. Detailed Implementation

[0026] 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.

[0027] Example 1

[0028] See Figure 3 An air spring piston includes a piston 1 and a buffer 2. The buffer 2 is fixedly disposed on the inner wall of the piston 1. In order to prevent the air spring from impacting the piston 1 and the protective cover 3 during the movement of the vehicle, in this embodiment, the buffer 2 is disposed on the end face of the piston 1 connected to the protective cover 3. Its connection method can be interference fit, bonding or vulcanization on the inner wall of the piston 1, or other fixing methods. The buffer 2 can be made of rubber or plastic, such as a breast milk rubber gasket or a plastic gasket.

[0029] The inner wall of piston 1 is provided with a positioning step 11 that is adapted to buffer 2, thereby providing positioning and partial support for buffer 2. Of course, the end face of the inner wall of piston 1 connected to the protective cover 3 can also be recessed radially along piston 1 to provide installation space for buffer 2.

[0030] See Figure 4 , Figure 5 The buffer component 2 includes a fixedly connected axial section and a radial section. In this embodiment, the axial section and the radial section are integrally formed. Both the axial section and the radial section are tightly fitted to the inner wall of the piston 1. Both the axial section and the radial section are annular structures. The outer diameter of the axial section is the same as the inner diameter of the piston 1.

[0031] It should be noted that the buffer component 2 is also provided with an annular groove 21, which is filled with buffer material. The buffer material can be rubber or plastic. In this case, the buffer component 2 can be made of rubber or non-rubber material.

[0032] See Figure 4The buffer component 2 is also provided with a vent hole 22 in the axial direction. The vent hole 22 is used to connect the outer area of ​​the protective cover 3 with the inside of the piston 1, thereby increasing the ventilation area. In this embodiment, the buffer component 2 may not be provided with a vent hole 22. The buffer component 2 needs to be used in conjunction with the protective cover 3. If the protective cover 3 has a vent groove, the buffer component 2 may not have a vent hole 22; if the protective cover 3 does not have a vent groove, the buffer component 2 is provided with a vent hole 22.

[0033] The vent 22 can be arc-shaped, rectangular, circular or other irregularly shaped. When the vent 22 is distributed at equal angles and is set in an arc shape, the inner side of the buffer 2 and the protective cover 3 can be a small clearance fit or an interference fit.

[0034] See Figure 6 The piston 1 has a second buffer 6 at its bottom. The second buffer 6 is located in the gap between the shock absorber 4 and the piston 1. In this embodiment, the second buffer 6 is interference-fitted with the piston 1, or the second buffer 6 is bonded or vulcanized to the bottom of the piston 1. This can fill the gap between the lower end of the piston 1 and the shock absorber 4, provide support for it, and solve the problem that the shock absorber 4 has no support and the sway angle is too large when the air spring is in motion of the whole vehicle.

[0035] Example 2

[0036] The difference between this embodiment and Embodiment 1 is that this embodiment provides an air spring that includes the air spring piston of Embodiment 1.

[0037] 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 piston characterized in that, The piston comprises a buffer I, which is arranged in the piston and connected to the end face of the protective cover.

2. An air spring piston as claimed in claim 1, wherein, The buffer I comprises a rubber ring or a plastic ring and is fixedly connected to the inner wall of the piston.

3. An air spring piston as claimed in claim 1, wherein, The buffer I is vulcanized to the inner wall of the piston.

4. An air spring piston as claimed in claim 1, wherein, The outer diameter of the buffer I is the same as the inner diameter of the piston, and the buffer I extends along the end face of the protective cover connected to the inner wall of the piston.

5. An air spring piston as claimed in claim 1, wherein, The buffer I is provided with air holes.

6. An air spring piston as defined in claim 1, wherein, The inner wall of the buffer I is provided with an annular groove filled with a buffer material.

7. An air spring piston as defined in claim 1, wherein, The inner wall of the piston is further provided with a positioning step matched with the buffer I.

8. An air spring piston as defined in claim 1, wherein, The buffer I comprises a fixedly connected axial section and a horizontal section, and the axial section and the horizontal section are coaxial with the piston axis.

9. An air spring piston as claimed in claim 1 wherein, The connecting end of the piston and the shock absorber is further provided with a buffer II, which is fixedly connected to the inner wall of the piston.

10. An air spring characterized by, The air spring piston comprises the air spring piston according to any one of claims 1-9.

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