Multi-dustproof device for rail shock absorber
By designing multiple dustproof devices on the track damper, including a metal dust cover, a retractable rubber dust cover, and a rubber dust ring, the oil leakage problem caused by the annular gap in the existing technology is solved, achieving a more efficient dustproof effect and durability.
Patent Information
- Application Number
- CN202520127589.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-01-20
AI Technical Summary
There is an annular gap between the metal dust cover and the oil reservoir of the existing track vibration damper, which allows fine sand and dust to enter, potentially damaging the oil seal and causing oil leakage.
A multi-layered dustproof device was designed, including a metal dust cover, a retractable rubber dust cover, and a rubber dust ring, which are respectively installed between the dust cover and the oil reservoir and between the piston rod and the top cover, and are fixed by stainless steel cable ties to form a triple dustproof structure.
It effectively blocks external sand and dust from entering the annular gap, reduces the risk of oil leakage, and improves the durability and dustproof effect of the track vibration damper.
Smart Images
Figure CN223622090U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of shock absorber technology, specifically relating to a multi-dustproof device for a track shock absorber. Background Technology
[0002] Currently, conventional track vibration dampers mainly rely on external metal dust covers for dust prevention, which are used to prevent foreign objects such as sand and dust from entering the damper during vehicle operation.
[0003] However, there is an annular gap between the metal dust cover of the shock absorber and the oil reservoir. During the operation of the rail vehicle, some fine sand, dust and other foreign objects will enter this gap through it, which may cause scratches on the piston rod. Gravel adhering to the oil seal lip will cause damage to the oil seal as the shock absorber moves, directly leading to oil leakage from the shock absorber. Utility Model Content
[0004] To solve the above problems, this utility model provides a multi-dustproof device for track shock absorbers, which has a simple structure and good dustproof effect.
[0005] This utility model is achieved through the following technical solution:
[0006] A multi-dustproof device for a track shock absorber, the shock absorber includes an oil reservoir, the two ends of which are respectively provided with a top cover and a bottom cover, a piston rod with one end passing through the top cover is provided inside the cylinder of the oil reservoir, a dust cover is provided on the outside of the oil reservoir near the top cover, and a dust sleeve is provided between the dust cover and the outside of the oil reservoir.
[0007] The dust cover is a telescopic cylindrical structure, which includes a dust cover body in the middle and a left connecting part and a right connecting part that are respectively located at both ends of the dust cover body and are in the shape of rings. The outer wall of the dust cover body is provided with telescopic pleats, and the inner diameters of the two connecting parts are different. The inner diameter of the left connecting part is larger and is used to fit on the outside of the dust cover, while the inner diameter of the right connecting part is smaller and fits against the outside of the oil reservoir.
[0008] Furthermore, a dustproof ring is installed between the piston rod and the top cover.
[0009] Furthermore, the dustproof ring is made of rubber.
[0010] Furthermore, the connecting parts at both ends of the dust cover are connected to the corresponding dust cover and the outer wall of the oil reservoir through a fixing mechanism.
[0011] Furthermore, the fixing mechanism is a stainless steel cable tie.
[0012] Furthermore, the dust cover is provided with several vent holes.
[0013] Furthermore, the dust cover is made of metal.
[0014] Furthermore, the dust cover is made of rubber.
[0015] The beneficial effects of this utility model are as follows:
[0016] This utility model features a triple dustproof design: the first layer is a metal dust cover on the upper part of the shock absorber; the second layer is a retractable rubber dust cover added between the metal dust cover and the oil reservoir, secured at both ends with stainless steel strips; the third layer is a rubber dust ring added between the piston rod and the top cover. This triple dustproof structure serves the following functions:
[0017] (1) A retractable rubber dust cover is installed between the dust cover and the oil reservoir. This design is the second dust protection device, which can effectively block external sand and dust from entering the annular gap between the dust cover and the oil reservoir, effectively reduce the risk of oil leakage, and effectively improve the durability of the track vibration damper.
[0018] (2) The dust cover of this utility model is designed as a telescopic structure, which can move with the shock absorber during the stretching and compression process. It is suitable for the small amplitude movement of the track shock absorber. The connecting parts at both ends of the dust cover have different diameters. The end with the larger diameter is fitted outside the dust cover, and the end with the smaller diameter is connected to the oil reservoir. This facilitates connection with the metal dust cover and the outside of the oil reservoir. Both connecting parts are connected to the corresponding dust cover and the outer wall of the oil reservoir through a fixing mechanism.
[0019] (3) Add a rubber dustproof ring between the piston rod and the top cover. This design is the third dustproof device, which can effectively block dust from entering through the exhaust hole of the rubber dustproof cover, enhance the dustproof effect and effectively reduce the risk of oil leakage. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0021] Figure 2 This is a schematic diagram of the structure of the dust cover of this utility model;
[0022] Figure 3 This is a schematic diagram of the dustproof ring of this utility model;
[0023] Figure descriptions: 1. Dust cover; 2. Oil reservoir; 3. Dust sleeve; 301. Dust sleeve body; 302. Left connecting part; 303. Right connecting part; 4. Stainless steel cable tie; 5. Piston rod; 6. Top cover; 7. Dust ring. Detailed Implementation
[0024] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but this does not limit the scope of protection of the present invention. Example
[0025] A multi-dustproof device for a track shock absorber, the shock absorber includes an oil reservoir 2, the two ends of the oil reservoir 2 are respectively provided with a top cover 6 and a bottom cover, and a piston rod 5 with one end passing through the top cover 6 is provided inside the cylinder of the oil reservoir 2. In this embodiment, the dustproof device is a double dustproof device.
[0026] The first dustproof structure is a dust cover 1 fitted on the outside of the oil reservoir 2 near the top cover 6. The dust cover 1 is made of metal and is used to prevent foreign objects such as sand and dust from entering the shock absorber during vehicle operation.
[0027] The second dustproof structure is a dustproof sleeve 3 fitted between the dust cover 1 and the outside of the oil storage cylinder 2. The dustproof sleeve 3 has several through holes and is made of rubber.
[0028] The dust cover 3 is a telescopic cylindrical structure that can move with the shock absorber during the stretching and compression process, making it suitable for the small amplitude movement characteristics of track shock absorbers. It includes a dust cover body 301 in the middle and a left connecting part 302 and a right connecting part 303 located at both ends of the dust cover body and forming annular shapes. The outer wall of the dust cover body 301 is provided with telescopic pleats, and the inner diameters of the two connecting parts are different. The inner diameter of the left connecting part 302 is larger and is fitted outside the dust cover, while the inner diameter of the right connecting part 303 is smaller and fits against the outside of the oil reservoir 2. The connection structure between the dust cover 3 and the dust cover can effectively prevent external sand and dust from entering the annular gap between the dust cover and the oil reservoir, effectively reducing the risk of oil leakage and effectively improving the durability of the track shock absorber.
[0029] Both ends of the dust cover 3 are connected to the corresponding dust cover and the outer wall of the oil storage cylinder through a fixing mechanism, which is a stainless steel cable tie 4.
[0030] Its assembly process is as follows:
[0031] Before assembling the shock absorber assembly, place the retractable rubber dust cover 3 on the outside of the cylinder. After the internal parts of the shock absorber are assembled, adjust the shock absorber to the installation length and then fix the strips at both ends of the rubber dust cover. Example
[0032] A multi-dustproof device for a track shock absorber, the shock absorber includes an oil reservoir 2, the two ends of the oil reservoir 2 are respectively provided with a top cover 6 and a bottom cover, and a piston rod 5 with one end passing through the top cover 6 is provided inside the cylinder of the oil reservoir 2. In this embodiment, the dustproof device is a triple dustproof device.
[0033] The first dustproof structure is a dust cover 1 fitted on the outside of the oil reservoir 2 near the top cover 6. The dust cover 1 is made of metal and is used to prevent foreign objects such as sand and dust from entering the shock absorber during vehicle operation.
[0034] The second dustproof structure is a dustproof sleeve 3 fitted between the dust cover 1 and the outside of the oil storage cylinder 2. The dustproof sleeve 3 has several through holes and is made of rubber.
[0035] The dust cover 3 is a telescopic cylindrical structure that can move with the vibration damper during stretching and compression, making it suitable for the small amplitude movement characteristics of track vibration dampers. It includes a dust cover body 301 in the middle and two annular connecting parts 302 and 303 at the two ends of the dust cover body. The outer wall of the dust cover body 301 is provided with telescopic pleats, and the inner diameters of the two connecting parts are different. The inner diameter of the left connecting part 302 is larger and is fitted outside the dust cover, while the inner diameter of the right connecting part 303 is smaller and fits against the outside of the oil reservoir 2. The connection structure between the dust cover 3 and the dust cover can effectively prevent external sand and dust from entering the annular gap between the dust cover and the oil reservoir, effectively reducing the risk of oil leakage and effectively improving the durability of the track vibration damper. The connecting parts at both ends of the dust cover 3 are connected to the corresponding dust cover and the outer wall of the oil reservoir through a fixing mechanism, which is a stainless steel cable tie 4.
[0036] The second layer of dust protection consists of a rubber dustproof ring 7 positioned between the piston rod 5 and the top cover 6. This effectively blocks dust from entering through the exhaust port of the rubber dust cover, enhancing dust protection and significantly reducing the risk of oil leakage.
[0037] Its assembly process is as follows:
[0038] When assembling the shock absorber piston rod and top cover, first insert the dust cover into the groove of the top cover, and then install the top cover and dust cover assembly on the piston rod. Before assembling the shock absorber assembly, put the retractable rubber dust cover 3 on the outside of the cylinder. After the internal parts of the shock absorber are assembled, adjust the shock absorber to the installation length, and then fix the strips at both ends of the rubber dust cover.
[0039] It should be noted that although the present invention has been described through the above embodiments, there may be other various embodiments of the present invention. Without departing from the spirit and scope of the present invention, those skilled in the art can obviously make various corresponding changes and modifications to the present invention, but all such changes and modifications should fall within the scope of protection of the appended claims and their equivalents.
Claims
1. A multi-dustproof device for track dampers, characterized in that: The shock absorber includes an oil reservoir (2), with a top cover (6) and a bottom cover at both ends of the oil reservoir (2). Inside the cylinder of the oil reservoir (2), there is a piston rod (5) with one end passing through the top cover (6). A dust cover (1) is fitted on the outside of the oil reservoir (2) near the top cover (6), and a dust cover (3) is fitted between the dust cover (1) and the outside of the oil reservoir (2). The dust cover (3) is a telescopic cylindrical structure, which includes a dust cover body (301) in the middle and a left connecting part (302) and a right connecting part (303) located at both ends of the dust cover body and in a ring shape. The outer wall of the dust cover body (301) is provided with telescopic pleats, and the inner diameters of the two connecting parts are different. The inner diameter of the left connecting part (302) is larger and is used to be fitted on the outside of the dust cover. The inner diameter of the right connecting part (303) is smaller and fits against the outside of the oil reservoir (2).
2. The multi-dustproof device for a track damper according to claim 1, characterized in that: A dustproof ring (7) is also provided between the piston rod (5) and the top cover (6).
3. The multi-dustproof device for a track damper according to claim 2, characterized in that: The dustproof ring (7) is made of rubber.
4. The multi-dustproof device for a track damper according to claim 1, characterized in that: Both ends of the dust cover (3) are connected to the corresponding dust cover and the outer wall of the oil storage cylinder through a fixing mechanism.
5. A multi-dustproof device for a track damper according to claim 4, characterized in that: The fixing mechanism is a stainless steel cable tie (4).
6. The multi-dustproof device for a track damper according to claim 1, characterized in that: The dust cover (3) is provided with several exhaust holes.
7. A multi-dustproof device for a track damper according to claim 1, characterized in that: The dust cover (1) is made of metal.
8. The multi-dustproof device for a track damper according to claim 1, characterized in that: The dust cover (3) is made of rubber.