Dustproof cover of shock absorber

Abstract

The utility model discloses a shock absorber dust cover which comprises a cover top and a cover body, the cover top comprises an upper surface and a lower surface, a piston rod hole is formed in the middle of the upper surface, a shock-resistant assembly is arranged on the upper surface, an annular isolation groove is formed in the center of the lower surface, the piston rod hole and the annular isolation groove are coaxially arranged, and a sealing piece is arranged in the annular isolation groove. The cover body is cylindrical, a containing cavity is formed in the cover body, the anti-seismic assembly comprises a plurality of anti-seismic units, the anti-seismic units are arranged on the upper surface in a matrix mode, the anti-seismic units are made of high-elasticity engineering plastics, and the problems that in the operation process of the magneto-rheological shock absorber, abnormal sound is generated due to friction between a dust cover and a buffer block, the rigidity of an existing dust cover is too high, and the anti-seismic effect is poor are solved. And impact and vibration cannot be effectively absorbed.

Description

Technical Field

[0001] This utility model relates to the technical field of shock absorber equipment, specifically a dust cover for a shock absorber. Background Technology

[0002] The dust cover wraps around the outer cylinder and piston rod of the shock absorber. It forms a ring-shaped sealing structure using flexible materials such as rubber or rigid shells such as metal / plastic. Its main purpose is to prevent foreign objects from directly contacting the piston rod and oil seal, and to guide water flow down the outer wall of the dust cover to prevent water from seeping into the shock absorber. On saline-alkali roads or roads where de-icing agents are applied in winter, the dust cover can prevent corrosive liquids from contacting the metal parts of the shock absorber. When the car encounters a bumpy road and the tires bounce, the dust cover needs to withstand the impact of the buffer block to protect the internal structure of the shock absorber.

[0003] Chinese patent document CN201811645911.4 discloses a dust cover assembly for a shock absorber. The dust cover assembly includes an upper cover and a lower cover; the upper cover is annular; the top of the lower cover forms an annular plate for connecting to the upper cover; a through-hole is formed between the upper cover and the annular plate. This invention can effectively eliminate the exhaust noise generated during the compression of the buffer block, while increasing the area of ​​the dust cover's upper surface, reducing the contact pressure between the buffer block and the dust cover, effectively optimizing the stress on the buffer block, and greatly improving the service life of the buffer block.

[0004] However, with the above structure, when the vehicle is driving on a bumpy road, the vibration will cause the buffer block to impact the upper surface of the dust cover. When the buffer block comes into contact with the dust cover and is deformed under pressure, the friction between the buffer block and the dust cover will cause abnormal noise, thus affecting the user's driving experience.

[0005] Therefore, a new dust cover for shock absorbers needs to be designed to remove or significantly reduce the abnormal noise generated by the friction between the dust cover and the buffer block; and to enhance the dust cover's resistance to pressure and deformation, and improve its rigidity. Utility Model Content

[0006] The purpose of this invention is to provide a dust cover for shock absorbers to solve the problems of poor shock resistance and poor sealing effect of existing dust covers for shock absorbers.

[0007] The purpose of this utility model is to provide a dust cover for a shock absorber, including a top cover and a body cover. The top cover includes an upper surface and a lower surface. A piston rod hole is provided in the middle of the upper surface. An anti-vibration component is provided on the upper surface. An annular isolation groove is provided in the center of the lower surface. The piston rod hole and the annular isolation groove are coaxially arranged. A sealing element is provided in the annular isolation groove. The body cover is cylindrical and has a receiving cavity inside.

[0008] As one embodiment of the present invention, the above-mentioned seismic component includes several seismic units, and each seismic unit is arranged in a matrix on the upper surface.

[0009] As one embodiment of this utility model, each of the above-mentioned anti-seismic units is made of highly elastic engineering plastic.

[0010] In one embodiment of this utility model, each of the above-mentioned seismic units is a square frustum, the side length of each square frustum is 1.5mm, and the spacing between each square frustum is 3mm.

[0011] As one embodiment of the present invention, the cover includes an outer wall and an inner wall, and a reinforcing strip is provided in the circumferential direction of the outer wall, with the reinforcing strips arranged at equal intervals.

[0012] As one embodiment of this utility model, the inner wall is provided with a plurality of air guide grooves and inclined guide walls, and a limiting strip is provided above each of the guide walls.

[0013] As one embodiment of this utility model, an exhaust groove corresponding to the air guide groove is provided on the lower surface, and the exhaust groove is connected to the piston rod hole through the sealing member.

[0014] As one embodiment of the present invention, the sealing element includes a sealing base, the sealing base is provided with an exhaust hole, and the exhaust hole is connected to the exhaust groove.

[0015] As one embodiment of this utility model, a pair of snap fasteners are also provided at the lower end of the cover.

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

[0017] 1. The dust cover of the shock absorber of this utility model improves the shock resistance performance of the dust cover by setting anti-vibration components, which can effectively reduce the impact of vibration on the shock absorber and extend the service life of the shock absorber.

[0018] 2. The design of the air guide groove, exhaust groove and exhaust hole can discharge gas in time and avoid gas accumulation, which further optimizes the working performance of the shock absorber. The snap-fit ​​design makes the dust cover installation more convenient and quick, and allows the dust cover to be firmly snapped onto the shock absorber, improving the stability of the structure.

[0019] 3. The sealing components ensure the internal sealing of the shock absorber, preventing dust and impurities from entering and lubricating oil from leaking, thus improving the performance and reliability of the shock absorber. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is an overall schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the bottom view of this utility model;

[0023] Figure 3 This is a top view of the present invention;

[0024] Figure 4 yes Figure 3 Enlarged view of part A in the diagram;

[0025] Figure 5 This is a cross-sectional schematic diagram of the present invention;

[0026] Figure 6 yes Figure 5 Enlarged view of part B of the structure;

[0027] In the figure: Top cover 1; Piston rod hole 10; Upper surface 11; Lower surface 12; Annular isolation groove 120; Exhaust groove 121; Cover body 2; Receiving cavity 20; Outer wall 21; Reinforcing strip 211; Inner wall 22; Air guide groove 220; Guide wall 221; Limiting strip 222; Anti-vibration component 3; Anti-vibration unit 31; Seal 4; Sealing base 41; Exhaust hole 42; Snap fastener 5. Detailed Implementation

[0028] 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.

[0029] 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.

[0030] Example 1

[0031] like Figure 1-6As shown, this utility model provides a dust cover for a shock absorber, which is used to solve the problem of abnormal noise generated by the friction between the dust cover and the buffer block during the operation of the magnetorheological shock absorber. The existing dust covers are too rigid and cannot effectively absorb impact and vibration. The present invention is a dust cover for a shock absorber that removes or significantly reduces the abnormal noise generated by friction; and enhances the pressure resistance and deformation resistance of the dust cover, thereby improving the rigidity of the dust cover.

[0032] like Figure 1-5 As shown, this utility model mainly includes a top cover 1 and a body cover 2. The top cover 1 includes an upper surface 11 and a lower surface 12. A piston rod hole 10 is provided in the middle of the upper surface 11, and an anti-vibration component 3 is provided on the upper surface 11. An annular isolation groove 120 is provided in the center of the lower surface 12. The piston rod hole 10 and the annular isolation groove 120 are coaxially arranged, and a sealing element 4 is provided in the annular isolation groove 120. The body cover 2 is cylindrical, and a receiving cavity 20 is provided inside the body cover 2. The dustproof sealing component 2 includes a dustproof sealing groove 20 and a dustproof sealing ring 21. The dustproof sealing ring 21 includes a conical isolation cover 211 and an annular connecting part 212. The end of the annular connecting part 212 is engaged with the side wall of the dustproof sealing groove 20.

[0033] The top cover 1 is an important component of the shock absorber's dust cover. The upper surface 11 is used to house the anti-vibration component 3 and the piston rod hole 10, while the lower surface 12 is used to house the annular isolation groove 120 to accommodate the seal 4. The top cover 1 is made of a plastic material with a certain strength and elasticity to ensure that it can withstand a certain amount of external force during use without being easily damaged.

[0034] The piston rod hole 10 is located in the middle of the upper surface 11, and its diameter is designed according to the diameter of the shock absorber piston rod to ensure that the piston rod can pass through smoothly.

[0035] like Figure 3-4 As shown, the seismic-resistant component 3 includes several seismic-resistant units 31, which are arranged in a matrix on the upper surface 11. This matrix arrangement enables the seismic-resistant component 3 to have good seismic performance in all directions. The seismic-resistant units 31 are made of highly elastic engineering plastics, such as PA66+GF or rubber. These materials have good elasticity and resilience, allowing them to deform under external impact, absorb energy, enhance the dust cover's resistance to pressure and deformation, and improve its rigidity, thereby providing seismic resistance and eliminating or significantly reducing abnormal noises caused by friction.

[0036] The diameter of the anti-seismic unit 31 can be set to 1.5-3mm, the height to 0.5mm, and the spacing to 3mm. It can be adjusted according to the size of the specific vehicle model. The overall shape of the anti-seismic unit 31 can be set to a hemispherical or square frustum.

[0037] In this invention, each seismic-resistant unit 31 is a square frustum, with a side length of 1.5 mm and a spacing of 3 mm between them. The square frustum design increases the contact area between the seismic-resistant unit 31 and the upper surface 11, improving its stability. Simultaneously, the appropriate side length and spacing ensure that the seismic-resistant assembly 3 can accommodate a sufficient number of seismic-resistant units 31 within a limited area, achieving a good seismic resistance effect. The circumferential local thickening of the seismic-resistant unit 31 enhances rigidity while maintaining the flexibility of the substrate.

[0038] Point support: When external pressure is applied to the dust cover, the seismic unit 31 acts as an independent force-bearing unit, distributing the concentrated load to the contact points of multiple seismic units 31 and buffer blocks. Local deformation absorption: After being compressed, the seismic unit 31 undergoes elastic deformation, absorbing impact energy and preventing brittle fracture of the overall structure.

[0039] The matrix-style discrete layout of the seismic unit 31 allows local areas to recover their original shape after repeated compression, reducing material fatigue accumulation and extending service life. When the dust cover contacts the buffer block, only the top of the seismic unit 31 is in contact, significantly reducing the friction area and thus reducing friction noise.

[0040] The cover 2 is cylindrical and basically consistent with the outer shell of the shock absorber. The cover 2 has a receiving cavity 20. The cover 2 includes an outer wall 21 and an inner wall 22. Reinforcing strips 211 are provided in the circumferential direction of the outer wall 21. The reinforcing strips 211 are arranged at equal intervals. In this utility model, they are arranged at 30-degree intervals, with a total of 12 reinforcing strips 211.

[0041] The reinforcing strip 211 enhances the strength and rigidity of the cover 2, preventing deformation under external forces. The reinforcing strip 211 is integrally formed with the cover 2 and can be made of the same material. During use, the shock-absorbing component 3 of the shock absorber dust cover effectively absorbs vibrations generated during vehicle operation, reducing the impact on the shock absorber.

[0042] The inner wall 22 is provided with several air guide grooves 220 and inclined guide walls 221. The function of the air guide grooves 220 is to allow gas to be smoothly discharged when the shock absorber is working, so as to avoid the performance of the shock absorber being affected by gas accumulation. The inclined design of the guide walls 221 can guide the relevant components of the shock absorber to smoothly enter the receiving cavity 20. A limiting strip 222 is provided above each guide wall 221. The limiting strip 222 is used to limit the position of the relevant components of the shock absorber and prevent them from shaking in the receiving cavity 20. The air guide grooves 220, guide walls 221 and limiting strips 222 can be integrally formed during the injection molding of the cover 2.

[0043] like Figure 5-6As shown, the seal 4 is disposed within the annular isolation groove 120. Its function is to prevent dust, impurities, etc., from entering the shock absorber through the piston rod hole 10, while ensuring that the lubricating oil inside the shock absorber does not leak. The seal 4 is usually made of rubber.

[0044] The seal 4 includes a sealing base 41, on which an exhaust port 42 is provided. The exhaust port 42 is connected to the exhaust groove 121, and when the shock absorber is working, gas can be discharged through the exhaust groove 121 and the exhaust port 42. The shape and size of the sealing base 41 should match the annular isolation groove 120 to ensure that it can be tightly installed in the annular isolation groove 120.

[0045] The seal 4 prevents dust, impurities, and other contaminants from entering the shock absorber, ensuring its normal operation. The air guide groove 220, exhaust groove 121, and exhaust hole 42 can promptly discharge the gas generated during the operation of the shock absorber, preventing gas accumulation from affecting the damping performance.

[0046] A pair of snap-fit ​​buckles 5 are also provided at the lower end of the cover 2. The function of the snap-fit ​​buckles 5 is to securely install the dust cover of the shock absorber onto the shock absorber and prevent it from falling off during use. The snap-fit ​​buckles 5 are integrally formed with the cover 2 and are made of the same material as the cover 2. Corresponding snap-fit ​​grooves are provided on the outer shell of the shock absorber, which correspond to the shape of the snap-fit ​​buckles 5 and can reliably snap into the corresponding parts on the shock absorber.

[0047] When installing the dust cover for the shock absorber, first install the seal 4 into the annular isolation groove 120 of the top cover 1, ensuring that the vent 42 of the seal 4 corresponds to the vent groove 121 on the lower surface 12, and that the cover body 2 and the top cover 1 are integrally formed. Then, install the installed dust cover onto the shock absorber using the snap fastener 5, allowing the piston rod to pass through the piston rod hole 10.

[0048] The shock absorber dust cover of the present invention improves the shock absorption performance of the dust cover by setting the anti-vibration component 3, which can effectively reduce the impact of vibration on the shock absorber and extend the service life of the shock absorber. The setting of the sealing element 4 ensures the internal sealing of the shock absorber, preventing dust and impurities from entering and lubricating oil from leaking, thereby improving the performance and reliability of the shock absorber. At the same time, the design of the air guide groove 220, the exhaust groove 121 and the exhaust hole 42 can discharge gas in time and avoid gas accumulation, further optimizing the working performance of the shock absorber. In addition, the setting of the snap-fit ​​buckle 5 makes the installation of the dust cover more convenient and quick, and the snap-fit ​​buckle makes the dust cover more secure. Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but must be 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 protection scope claimed by this utility model.

[0049] 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 dust cover for a shock absorber, characterized in that, The cover includes a top (1) and a body (2). The top (1) includes an upper surface (11) and a lower surface (12). A piston rod hole (10) is provided in the middle of the upper surface (11). An anti-vibration component (3) is provided on the upper surface (11). An annular isolation groove (120) is provided in the center of the lower surface (12). The piston rod hole (10) and the annular isolation groove (120) are coaxially arranged. A sealing element (4) is provided in the annular isolation groove (120). The body (2) is cylindrical and has a receiving cavity (20) inside.

2. The dust cover for a shock absorber according to claim 1, characterized in that, The seismic component (3) includes several seismic units (31), and each seismic unit (31) is arranged in a matrix on the upper surface (11).

3. A dust cover for a shock absorber according to claim 2, characterized in that, Each of the earthquake-resistant units (31) is made of highly elastic engineering plastic.

4. A dust cover for a shock absorber according to claim 3, characterized in that, Each of the seismic units (31) is a square frustum, with a side length of 1.5 mm and a spacing of 3 mm between the square frustums.

5. A dust cover for a shock absorber according to claim 1, characterized in that, The cover (2) includes an outer wall (21) and an inner wall (22). Reinforcing strips (211) are provided on the circumference of the outer wall (21), and the reinforcing strips (211) are arranged at equal intervals.

6. A dust cover for a shock absorber according to claim 5, characterized in that, The inner wall (22) is provided with a plurality of air guide grooves (220) and inclined guide walls (221), and a limiting strip (222) is provided above each guide wall (221).

7. A dust cover for a shock absorber according to claim 6, characterized in that, An exhaust groove (121) corresponding to the air guide groove (220) is provided on the lower surface (12), and the exhaust groove (121) is connected to the piston rod hole (10) through the seal (4).

8. A dust cover for a shock absorber according to claim 7, characterized in that, The sealing element (4) includes a sealing base (41), on which an exhaust hole (42) is provided, and the exhaust hole (42) and the exhaust groove (121) are connected.

9. A dust cover for a shock absorber according to claim 8, characterized in that, A pair of snap fasteners (5) are also provided at the lower end of the cover (2).

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