A leak-proof air spring end cap

Abstract

This utility model discloses a leak-proof air spring end cap, including an end cap body, which includes an end cap base, an end cap connecting seat, and an end cap top plate. The end cap base and end cap connecting seat each have a first receiving cavity, and the end cap top plate has a second receiving cavity. The first and second receiving cavities are interconnected. A sealing device is installed in the second receiving cavity, and an electrical connection device is installed within the sealing device. The upper end of the electrical connection device is electrically connected to an external cable, and the lower end is electrically connected to an internal cable. This invention solves the problem that in existing shock absorbers, the connection between the air spring upper end cap and the piston rod has only one layer of protection, and the air spring upper end cap and piston rod move up and down with damping requirements, making it easy for gas in the air spring cavity to leak from this point. This reduces the elasticity of the air spring, resulting in poor overall shock absorption and low ride comfort.

Description

Technical Field

[0001] This utility model relates to the field of shock absorber technology, specifically to a leak-proof air spring end cap. Background Technology

[0002] Magnetorheological air spring dampers are intelligent damping devices that combine magnetorheological technology with the characteristics of air springs. They achieve dynamic stiffness and damping control by adjusting the magnetic field strength and air pressure. While air springs can partially replace traditional metal springs, improving vehicle handling and ride comfort, the addition of magnetorheological dampers requires additional wiring for real-time adjustment of damping force. Therefore, compared to existing spring-based magnetorheological dampers, magnetorheological air spring dampers demand higher manufacturing standards.

[0003] Patent document CN2024220392211 discloses a magnetorheological damper with an integrated air spring, comprising a piston rod, an air spring, an excitation coil, a permanent magnet, and a floating piston. The air spring is positioned at the upper end of the damper and is tightly fitted to the piston rod. The excitation piston has an annular groove machined into it, and the excitation coil is placed inside the annular groove. The permanent magnet is placed inside the excitation coil. The air spring is filled with rigid gas. When the piston rod is compressed, the air spring actuates, providing rigid force to the damper during its movement.

[0004] However, the above-mentioned shock absorber has holes directly drilled in the air spring end cap, and the connection between the air spring upper end cap and the piston rod is only protected by one layer. The air spring upper end cap and the piston rod will move up and down with the shock absorption requirements, and the gas in the air spring cavity can easily leak from this point, causing the air spring to not play 100% of its role or to fail. The elasticity of the air spring is reduced, resulting in poor shock absorption effect of the entire shock absorber and low ride comfort. Therefore, it is urgent to design a new leak-proof air spring end cap. Utility Model Content

[0005] The purpose of this invention is to provide a leak-proof air spring end cap, which aims to improve the existing shock absorber where the connection between the air spring upper end cap and the piston rod has only one layer of protection. Moreover, the air spring upper end cap and the piston rod move up and down with the shock absorption requirements, and the gas in the air spring cavity is easy to leak from this point, which reduces the elasticity of the air spring and results in poor shock absorption effect and low ride comfort of the entire shock absorber.

[0006] This utility model is implemented as follows: a leak-proof air spring end cap includes an end cap body, which includes an end cap base, an end cap connecting seat, and an end cap top plate. The end cap base and the end cap connecting seat are provided with a first receiving cavity, and the end cap top plate is provided with a second receiving cavity. The first and second receiving cavities are interconnected. A sealing device is provided in the second receiving cavity, and an electrical connection device is provided in the sealing device. The upper end of the electrical connection device is electrically connected to an external cable, and the lower end of the electrical connection device is electrically connected to an internal cable.

[0007] As one embodiment of this utility model, the sealing device is fitted with a sealing ring, the sealing device has two connecting cavities, and the electrical connection device has two components, which are respectively snapped and fixed in the corresponding connecting cavities.

[0008] As one embodiment of this utility model, the above-mentioned electrical connection device is made of conductive material.

[0009] As one embodiment of this utility model, each of the above-mentioned electrical connection devices includes an upper connecting rod, a snap-fit ​​seat, and a lower connecting plate connected in sequence.

[0010] As one embodiment of this utility model, the upper connecting rod is provided with a cable slot, and the lower connecting plate is provided with a cable connection hole.

[0011] As one embodiment of this utility model, the aforementioned external cable is snapped into the aforementioned cable slot.

[0012] As one embodiment of this utility model, the top end of the aforementioned internal cable is provided with two barbed cables, and the two barbed cables are connected in the corresponding cable connection holes.

[0013] As one embodiment of this utility model, the above-mentioned snap-fit ​​seat is provided with an upper snap-fit ​​sealing ring and a lower snap-fit ​​sealing ring.

[0014] As one embodiment of this utility model, the end cap base is provided with a first annular sealing groove in the circumferential direction.

[0015] As one embodiment of this utility model, the end cap connecting seat is provided with a second annular sealing groove in the circumferential direction.

[0016] The beneficial effects of this utility model are: 1. This utility model achieves the problem of safe and sealed wiring of the internal magnetorheological damper by setting up an end cap body, a sealing device and an electrical connection device, avoiding the problem of air leakage caused by simple direct wiring, and effectively ensuring the damping function of the air spring. 2. By setting up an electrical connection device, this utility model enables the end cover body to maintain the power transmission and control of the internal magnetorheological damper while maintaining a highly efficient seal. The overall assembly is simple, and it can be mass-produced and configured on most air springs, making subsequent maintenance and replacement convenient. Attached Figure Description

[0017] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model, making other features, objects, and characteristics of the utility model more apparent. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model.

[0018] Figure 1 This is an overall schematic diagram of the present invention; Figure 2 This is an overall cross-sectional view of the present invention; Figure 3 This is a cross-sectional view of the end cap body of this utility model; Figure 4 This is an assembly drawing of the sealing device of this utility model; Figure 5 This is a cross-sectional schematic diagram of the sealing device of this utility model; Figure 6 This is a schematic diagram of the electrical connection device of this utility model; In the figure: End cap body 1; First receiving cavity 101; Second receiving cavity 102; End cap base 11; First annular sealing groove 110; End cap connecting seat 12; Second annular sealing groove 120; End cap top plate 13; Sealing device 2; Connecting cavity 20; Sealing ring 21; External cable 3; Internal cable 4; Hook-type cable 41; Electrical connection device 5; Upper connecting rod 51; Cable slot 510; Clip seat 52; Upper clip sealing ring 521; Lower clip sealing ring 522; Lower connecting plate 53; Cable connection hole 530. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] Example 1, as Figures 1-6 As shown, the leak-proof air spring end cap of this utility model mainly consists of an end cap body 1, a sealing device 2, an electrical connection device 5, an external cable 3, and an internal cable 4.

[0022] The end cap body 1 serves as a sealing connection assembly for the top of the entire air spring; the sealing device 2 is used to achieve a seal inside the end cap to prevent air leakage inside the air spring; the electrical connection device 5 is responsible for the electrical connection between the external cable 3 and the internal cable 4; the external cable 3 and the internal cable 4 are used to transmit current to the external circuit and the internal circuit, respectively.

[0023] Specifically, such as Figure 2 As shown, the end cap body 1 includes an end cap base 11, an end cap connecting seat 12, and an end cap top plate 13. The end cap body 1 is integrally molded to ensure the structural strength and sealing performance of the end cap body 1.

[0024] like Figures 2-3 As shown, the end cap base 11 and the end cap connecting seat 12 are provided with a first receiving cavity 101, and the end cap top plate 13 is provided with a second receiving cavity 102. The first receiving cavity 101 and the second receiving cavity 102 are interconnected to form a continuous internal space for accommodating the sealing device 2 and the electrical connection device 5.

[0025] like Figure 3 As shown, a first annular sealing groove 110 is provided circumferentially on the end cap base 11, and a second annular sealing groove 120 is provided circumferentially on the end cap connecting seat 12. During installation, suitable sealing rings are embedded into the first annular sealing groove 110 and the second annular sealing groove 120 respectively. When the end cap body 1 is connected to the air spring body, the sealing rings are compressed and deformed, filling the gap at the connection, thereby achieving a reliable seal and preventing gas leakage.

[0026] The sealing device 2 is installed in the second receiving cavity 102. The sealing device 2 is fitted with a sealing ring 21 and has two connecting cavities 20 inside. The sealing device 2 is made of rubber material.

[0027] like Figures 5-6 As shown, the electrical connection device 5 is made of a conductive material, such as a copper alloy, which has good electrical conductivity and a certain mechanical strength to prevent deformation and air leakage. Each electrical connection device 5 includes an upper connecting rod 51, a snap-fit ​​seat 52 and a lower connecting plate 53 connected in sequence.

[0028] The upper connecting rod 51 is provided with a cable slot 510, and the lower connecting plate 53 is provided with a cable connection hole 530. The snap-fit ​​seat 52 is provided with an upper snap-fit ​​sealing ring 521 and a lower snap-fit ​​sealing ring 522, both of which are made of rubber material, to enhance the sealing performance between the electrical connection device 5 and the sealing device 2.

[0029] Two electrical connection devices 5 are respectively snapped and fixed in the corresponding connection cavities 20 of the sealing device 2. The upper snap-on sealing ring 521 and the lower snap-on sealing ring 522 are in close contact with the inner wall of the connection cavity 20 to form a sealing structure, which can prevent internal gas leakage and prevent external impurities from entering the connection cavity 20.

[0030] The external cable 3 includes positive and negative wires. The ends of the two wires are respectively snapped into the cable slots 510 of the two upper connecting rods 51. The external cable 3 is electrically connected to the upper connecting rods 51 by snapping, so as to ensure that the current can be stably transmitted to the internal magnetorheological damper.

[0031] like Figures 4-5 As shown, the top of the internal cable 4 is provided with two barbed cables 41. When the barbed cables 41 of the internal cable 4 are inserted into the cable connection hole 530 of the lower connecting plate 53, the special structure of the barbed cables 41 can make them firmly connected in the cable connection hole 530, preventing the internal cable 4 from falling off during use and ensuring the stability of the electrical connection.

[0032] This invention achieves a safe and sealed connection for the internal magnetorheological damper by setting up an end cap body, a sealing device, and an electrical connection device. This avoids the air spring leakage problem caused by simple direct wiring, effectively ensuring the damping function of the air spring. By setting up the electrical connection device, the end cap body can maintain the power supply and control of the internal magnetorheological damper while maintaining a highly efficient seal. The overall assembly is simple, and it can be mass-produced and configured on most air springs, making subsequent maintenance and replacement convenient.

[0033] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0034] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A leak-proof air spring end cap, characterized in that, The device includes an end cap body (1), which includes an end cap base (11), an end cap connecting seat (12), and an end cap top plate (13). A first receiving cavity (101) is provided in the end cap base (11) and the end cap connecting seat (12), and a second receiving cavity (102) is provided in the end cap top plate (13). The first receiving cavity (101) and the second receiving cavity (102) are interconnected. A sealing device (2) is provided in the second receiving cavity (102), and an electrical connection device (5) is provided in the sealing device (2). The upper end of the electrical connection device (5) is electrically connected to an external cable (3), and the lower end of the electrical connection device (5) is electrically connected to an internal cable (4).

2. The leak-proof air spring end cap according to claim 1, characterized in that, The sealing device (2) is fitted with a sealing ring (21), and two connecting cavities (20) are provided inside the sealing device (2). There are two electrical connecting devices (5), which are respectively snapped and fixed in the corresponding connecting cavities (20).

3. The leak-proof air spring end cap according to claim 2, characterized in that, The electrical connection device (5) is made of conductive material.

4. The leak-proof air spring end cap according to claim 3, characterized in that, Each of the electrical connection devices (5) includes an upper connecting rod (51), a snap-fit ​​seat (52), and a lower connecting plate (53) connected in sequence.

5. The leak-proof air spring end cap according to claim 4, characterized in that, The upper connecting rod (51) is provided with a cable slot (510), and the lower connecting plate (53) is provided with a cable connection hole (530).

6. The leak-proof air spring end cap according to claim 5, characterized in that, The external cable (3) is snapped into the cable slot (510).

7. The leak-proof air spring end cap according to claim 5, characterized in that, The top of the internal cable (4) is provided with two barbed cables (41), and the two barbed cables (41) are connected in the corresponding cable connection hole (530).

8. The leak-proof air spring end cap according to claim 4, characterized in that, An upper snap-fit ​​sealing ring (521) and a lower snap-fit ​​sealing ring (522) are provided on the snap-fit ​​seat (52).

9. The leak-proof air spring end cap according to claim 1, characterized in that, A first annular sealing groove (110) is provided in the circumferential direction of the end cap base (11).

10. The leak-proof air spring end cap according to claim 9, characterized in that, A second annular sealing groove (120) is provided in the circumferential direction of the end cap connecting seat (12).

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