Dustproof shock absorber

Abstract

The dustproof shock absorber comprises a bottom cylinder and a sleeve which are oppositely arranged, a piston rod extending into the sleeve is fixed to the bottom cylinder, a buffer cavity is formed in the sleeve, a sealing cover is installed on the sleeve, a partition plate is arranged on the piston rod, a cleaning cavity surrounding the periphery of the piston rod is formed in the sealing cover, and the piston rod is arranged in the cleaning cavity. A dustproof ring located on the outer side of the buffering cavity is arranged on the sealing cover. When the piston rod moves up and down in the sleeve for damping, damping oil can be driven by the partition plate moving up and down to flow in the buffer cavity to consume vibration energy, so that the damping effect is guaranteed, and along with up-down movement of the piston rod, the dustproof ring can scrape off impurities attached to the piston rod; and residual impurities attached to the piston rod are further cleaned and filtered out through cleaning liquid in the cleaning cavity, the impurities are prevented from permeating into the sleeve from gaps in the periphery of the piston rod, the service life of the shock absorber is prolonged, and the use reliability of the shock absorber is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive shock absorption, in particular to a dust-proof shock absorber. Background Art

[0002] An automotive shock absorber is a component widely used in automobiles. When the vehicle is driving on an uneven road surface, the spring will absorb and store vibration energy, and the piston rod of the shock absorber will move up and down in the sleeve, causing the shock-absorbing oil to repeatedly flow from one cavity through pores into another cavity, so as to consume vibration energy through the flow of the shock-absorbing oil, thereby playing a role in shock absorption.

[0003] Therefore, the shock absorber plays a very important role in the safety and comfort of vehicle driving. However, with the use of the shock absorber, external impurities such as dust or sediment are likely to slowly penetrate into the sleeve of the shock absorber from the piston rod, which may cause scratches on the piston rod and lead to oil leakage, and even accelerate the aging of the shock absorber, greatly reducing the service life of the shock absorber and other problems. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and provide a dust-proof shock absorber.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A dust-proof shock absorber includes a bottom cylinder and a sleeve arranged opposite to each other. A spring is arranged between the bottom cylinder and the sleeve. A piston rod extending into the sleeve is fixed on the bottom cylinder. A buffer cavity is formed inside the sleeve. A cover for closing the buffer cavity is installed on the sleeve. A partition located in the buffer cavity is arranged on the piston rod. A cleaning cavity surrounding the outer circumference of the piston rod is formed in the cover. A dust-proof ring located outside the buffer cavity is arranged on the cover, and the inner circumference of the dust-proof ring abuts against the outer circumference of the piston rod.

[0007] Preferably, an inner groove for placing the dust-proof ring is formed at the lower end of the cover. A fixing ring is installed on the inner groove. The dust-proof ring is pressed and fixed in the inner groove through the fixing ring. The cleaning cavity and the inner groove are distributed from the inside to the outside along the length direction of the piston rod.

[0008] Preferably, the dust-proof ring includes a plurality of blocking strips, and the blocking strips abut against the outer circumference of the piston rod and extend obliquely outwards.

[0009] Preferably, an injection hole communicating with the cleaning cavity is formed on the cover, and a plug is installed on the injection hole.

[0010] Preferably, a convex ring located in the buffer cavity is arranged on the cover. A cover plate is fixed on the convex ring. A sealing ring is arranged between the cover plate and the convex ring, and the inner circumference of the sealing ring abuts against the outer circumference of the piston rod.

[0011] Preferably, an extension ring is provided on the cover plate and located outside the convex ring. The extension ring is clamped on the convex ring, and the cover plate presses the sealing ring downward.

[0012] Preferably, the outer periphery of the partition plate is attached to the inner periphery of the sleeve, and through holes penetrating up and down are provided on the partition plate.

[0013] Preferably, a clamping groove is provided on the piston rod, and a clamping plate for fixing the partition plate is installed on the clamping groove.

[0014] Preferably, a notch is provided on one side of the clamping plate.

[0015] The beneficial effects of the present utility model are as follows:

[0016] By passing the piston rod through the sealing cover and extending it into the buffer cavity of the sleeve, and injecting shock-absorbing oil into the buffer cavity. When the piston rod moves up and down in the sleeve for shock absorption, the shock-absorbing oil can be driven to flow in the buffer cavity by the partition plate moving up and down, so as to consume the vibration energy, thereby ensuring the shock-absorbing effect. At the same time, by respectively arranging a cleaning cavity and a dust-proof ring on the inner and outer sides of the sealing cover, as the piston rod moves up and down, the dust-proof ring can scrape off most of the dust, sludge and other impurities attached to the piston rod, and the residual impurities attached to the piston rod are further cleaned and filtered by the cleaning liquid in the cleaning cavity, preventing the impurities from penetrating into the sleeve from the gap on the outer periphery of the piston rod, so as to extend the service life of the shock absorber and ensure the reliability of the shock absorber in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of the present utility model;

[0018] Figure 2 is a schematic cross-sectional view of the present utility model;

[0019] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0020] Figure 4 is Figure 2 an enlarged schematic view of part B in

[0021] Figure 5 is a partial exploded schematic view of the present utility model;

[0022] Figure 6 is an assembly schematic view of the piston rod and the partition plate of the present utility model;

[0023] Figure 7 is a matching schematic view of the piston rod and the retaining ring of the present utility model.

[0024] In the figure: bottom cylinder 1, piston rod 11, card slot 111, partition plate 12, through hole 121, clamping plate 13, notch 131, sleeve 2, cover 21, cleaning cavity 211, injection hole 212, plug 213, convex ring 214, inner groove 215, buffer cavity 22, cover plate 23, extension ring 231, sealing ring 24, dust-proof ring 25, retaining strip 251, fixing ring 26, spring 3. Detailed implementation mode

[0025] The following further describes the present utility model in conjunction with the accompanying drawings and the detailed implementation mode:

[0026] In the description of this specification, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0027] As Figures 1 to 7 shown, a dust-proof shock absorber includes a bottom cylinder 1 and a sleeve 2 arranged oppositely. The sleeve 2 is a piston cylinder with an open lower end. A spring 3 is arranged between the bottom cylinder 1 and the sleeve 2. A piston rod 11 extending into the sleeve 2 is fixed on the bottom cylinder 1. A buffer cavity 22 is formed inside the sleeve 2. A cover 21 for closing the buffer cavity 22 is installed on the sleeve 2. The piston rod 11 penetrates through the cover 21 and extends into the buffer cavity 22. A shock-absorbing oil for shock absorption and buffering is injected into the buffer cavity 22. The cover 21 is hermetically installed at the lower port of the sleeve 2 to relatively seal the buffer cavity 22.

[0028] A partition plate 12 located in the buffer cavity 22 is arranged on the piston rod 11. The partition plate 12 is fixedly installed on the piston rod 11. The outer periphery of the partition plate 12 is attached to the inner periphery of the sleeve 2. The partition plate 12 divides the buffer cavity 22 into upper and lower parts. A through hole 121 penetrating up and down is formed on the partition plate 12. The shock-absorbing oil in the buffer cavity 22 can pass through the through hole 121 to flow in the buffer cavity 22 divided into upper and lower parts.

[0029] When the piston rod 11 moves up and down in the sleeve 2 for shock absorption, the partition plate 12 can be driven to move synchronously by the piston rod 11 moving up and down, and the shock-absorbing oil is driven to flow in the buffer cavity 22, thereby consuming the vibration energy and ensuring the shock-absorbing effect of this embodiment.

[0030] Further, a clamping groove 111 is formed on the piston rod 11. The number of the clamping grooves 111 is two and they are arranged at intervals along the length direction of the piston rod 11. The partition plate 12 is arranged between the two clamping grooves 111. A clamping plate 13 for fixing the partition plate 12 is installed on the clamping groove 111. The clamping plate 13 is clamped and fixed on the clamping groove 111. The two clamping plates 13 respectively abut against the partition plate 12 from above and below to realize the installation and positioning of the partition plate 12.

[0031] Reference Figure 5 、 Figure 6 As shown in the figure, a notch 131 is formed on one side of the clamping plate 13. The notch 131 can be used to pry open the clamping plate 13 outward so that the clamping plate 13 can be better fixed on the clamping groove 111.

[0032] A convex ring 214 located in the buffer cavity 22 is arranged on the sealing cover 21. The inner circumference of the convex ring 214 is spaced from the outer circumference of the piston rod 11. A cover plate 23 is fixed on the convex ring 214. A sealing ring 24 is arranged between the cover plate 23 and the convex ring 214. The cover plate 23 presses the sealing ring 24 downward so that the inner circumference of the sealing ring 24 abuts against the outer circumference of the piston rod 11. Further, when the piston rod 11 moves up and down, the outer circumference of the piston rod 11 is sealed by the sealing ring 24 in contact, and the damping oil in the buffer cavity 22 will not leak out from the gap on the outer circumference of the piston rod 11.

[0033] An extension ring 231 located on the outer circumference of the convex ring 214 is arranged on the cover plate 23. The outer circumference of the extension ring 231 is spaced from the inner circumference of the sleeve 2 to avoid interference between the cover plate 23 and the sleeve 2. The extension ring 231 is clamped on the convex ring 214. The cover plate 23 is clamped and fixed through the extension ring 231 to ensure the reliability of the cover plate 23 pressing and fixing the sealing ring 24.

[0034] A cleaning cavity 211 surrounding the outer circumference of the piston rod 11 is formed in the sealing cover 21. Cleaning liquid or clean water can be injected into the cleaning cavity 211. A dust-proof ring 25 located outside the buffer cavity 22 is arranged on the sealing cover 21. The cleaning cavity 211 and the dust-proof ring 25 are vertically distributed on the outer circumference of the piston rod 11.

[0035] Further, an inner groove 215 for placing the dust-proof ring 25 is formed at the lower end of the sealing cover 21. A fixing ring 26 is installed on the inner groove 215. The fixing ring 26 can be installed in the inner groove 215 by threads. The dust-proof ring 25 is pressed and fixed in the inner groove 215 through the fixing ring 26, that is, with the installation of the fixing ring 26, the fixing ring 26 presses and fixes the dust-proof ring 25 in the inner groove 215.

[0036] The inner periphery of the dustproof ring 25 abuts against the outer periphery of the piston rod 11. The dustproof ring 25 includes a plurality of baffles 251. The baffles 251 may be made of rubber. The baffles 251 abut against the outer periphery of the piston rod 11 and extend outwardly at an angle. When the piston rod 11 moves up and down, the baffles 251 of the dustproof ring 25 can scrape off most of the dust, sludge and other impurities attached to the piston rod 11 to ensure the reliability of the vibration reduction action of the piston rod 11 when it moves up and down.

[0037] The cleaning cavity 211 and the inner groove 215 are distributed from inside to outside along the length direction of the piston rod 11, that is, the cleaning cavity 211 and the dust ring 25 are distributed inside and outside the cover 21, and the impurities attached to the piston rod 11 are first cleaned by the dust ring 25, and then as the piston rod 11 moves upward (refer to Figure 2 The direction shown can also be understood as that as the piston rod 11 moves into the sleeve 2), the cleaning liquid in the cleaning chamber 211 further cleans and filters the residual impurities attached to the piston rod 11, so as to prevent the impurities attached to the piston rod 11 from moving up and down with the piston rod 11 and causing scratches on the surface of the piston rod 11, and also prevent the impurities from penetrating into the sleeve 2 from the gap around the piston rod 11, thereby accelerating the wear and aging of the present embodiment during use, extending the service life of the present embodiment, and ensuring the reliability and stability of the use of the present embodiment.

[0038] Furthermore, the cover 21 is provided with an injection hole 212 connected to the cleaning chamber 211, and cleaning liquid can be conveniently injected into the cleaning chamber 211 through the injection hole 212. A plug 213 is installed on the injection hole 212, and the cleaning chamber 211 is blocked by the plug 213. When the cleaning chamber 211 has been used for a certain period of time, a large amount of impurities may be filtered and retained in the cleaning chamber 211. The cleaning chamber 211 is opened through the plug 213 and the inside of the cleaning chamber 211 is rinsed to clean out the impurities retained in the cleaning chamber 211. After the rinsing is completed, the cleaning liquid is re-injected into the inner cleaning chamber 211 to ensure the reliability of cleaning the impurities of the piston rod 11.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dust-proof shock absorber, comprising a bottom cylinder (1) and a sleeve (2) arranged oppositely, a spring (3) is arranged between the bottom cylinder (1) and the sleeve (2), a piston rod (11) extending into the sleeve (2) is fixed on the bottom cylinder (1), and it is characterized in that: A buffer chamber (22) is formed inside the sleeve (2). A cover (21) for closing the buffer chamber (22) is mounted on the sleeve (2). A partition plate (12) located inside the buffer chamber (22) is provided on the piston rod (11). A cleaning chamber (211) surrounding the outer circumference of the piston rod (11) is formed inside the cover (21). A dust-proof ring (25) located outside the buffer chamber (22) is provided on the cover (21). The inner circumference of the dust-proof ring (25) abuts against the outer circumference of the piston rod (11).

2. The dust-proof shock absorber according to claim 1, characterized in that: An inner groove (215) for placing the dust-proof ring (25) is formed at the lower end of the cover (21). A fixing ring (26) is mounted on the inner groove (215). The dust-proof ring (25) is pressed and fixed in the inner groove (215) through the fixing ring (26). The cleaning chamber (211) and the inner groove (215) are distributed from the inside to the outside along the length direction of the piston rod (11).

3. The dust-proof shock absorber according to claim 1, characterized in that: The dust-proof ring (25) includes a plurality of blocking strips (251). The blocking strips (251) abut against the outer circumference of the piston rod (11) and extend obliquely outwards.

4. The dust-proof shock absorber according to claim 1, characterized in that: A pouring hole (212) communicating with the cleaning chamber (211) is formed on the cover (21). A plug (213) is mounted on the pouring hole (212).

5. A dust-proof shock absorber according to claim 1, characterized in that: A convex ring (214) located in the buffer chamber (22) is provided on the cover (21). A cover plate (23) is fixed on the convex ring (214). A sealing ring (24) is provided between the cover plate (23) and the convex ring (214). The inner circumference of the sealing ring (24) presses against the outer circumference of the piston rod (11).

6. The dust-proof shock absorber according to claim 5, wherein: An extension ring (231) located outside the convex ring (214) is provided on the cover plate (23). The extension ring (231) is clamped on the convex ring (214). The cover plate (23) presses the sealing ring (24) downwards.

7. A dust-proof shock absorber according to claim 1, characterized in that: The outer circumference of the partition plate (12) is arranged to fit the inner circumference of the sleeve (2). A through hole (121) penetrating up and down is formed on the partition plate (12).

8. A dust-proof shock absorber according to claim 1, characterized in that: A clamping groove (111) is formed on the piston rod (11). A clamping plate (13) for fixing the partition plate (12) is mounted on the clamping groove (111).

9. The dust-proof shock absorber according to claim 8, characterized in that: A notch (131) is formed on one side of the clamping plate (13).

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