Filter for a shock absorber

Abstract

The utility model relates to the technical field of shock absorber oil liquid filtration, specifically relates to a filter for shock absorber, including casing and filter core, the casing includes the sleeve pipe for setting on the inner cylinder of shock absorber, be equipped with the oil filter hole on the casing, the casing has the filter cavity with the oil filter hole intercommunication, the filter core sets up in filter cavity, the utility model adds the casing with filter core in the inner cylinder of shock absorber, makes shock absorber work process, and the shock absorbing oil can flow through the oil filter hole and is filtered by filter core, thereby effectively removes the mechanical impurity and oxidation product therein, further long -term maintains the cleanliness of oil liquid, finally reaches the effect of delaying component wear and tear, prolonging the overall life of shock absorber.

Description

Technical Field

[0001] This utility model relates to the field of shock absorber oil filtration technology, and in particular to a filter for shock absorbers. Background Technology

[0002] In vibration damping devices, damping oil not only serves a lubricating function but is also a crucial medium for transmitting and dissipating vibrational energy. However, existing vibration dampers lack the ability to purify the damping oil, leading to the continuous accumulation of contaminants such as metal shavings, sludge, and gum, thus shortening their service life. Specifically, contaminants can clog or alter the oil passages of precision valve systems, causing damping force to fail to output as designed, affecting vibration damping performance. Simultaneously, these impurities exacerbate the wear of piston rods, seals, and cylinders, generating more metal shavings and further contaminating the oil. Metal shavings and other contaminants also catalyze the oxidation process of the damping oil, accelerating the formation of sludge and acidic substances. These acidic substances not only corrode precision valve components and metal surfaces but also cause rubber seals to age, harden, and lose elasticity, ultimately leading to oil leaks and creating a vicious cycle. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a filter for a shock absorber, which can be installed inside the shock absorber to filter the damping oil, thereby extending the service life of the shock absorber.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a filter for a shock absorber, comprising a housing and a filter element; the housing includes a sleeve for being fitted onto the inner cylinder of the shock absorber, the housing is provided with an oil filter hole, the housing has a filter cavity communicating with the oil filter hole, and the filter element is disposed in the filter cavity.

[0005] Furthermore, the housing also includes an outer tube, the sleeve is coaxially arranged with the outer tube and disposed inside the outer tube, and the filter element is located between the outer tube and the sleeve.

[0006] Furthermore, the housing also includes an end cap, which has a flange that can be inserted between the sleeve and the outer tube. The sleeve, the outer tube, and the flange together form the filter cavity, and the end cap has an oil filter hole.

[0007] Furthermore, the outer tube wall is provided with a first auxiliary oil hole that communicates with the filter cavity.

[0008] Furthermore, the opening size of the first auxiliary oil hole is from 0.5 mm to 200 mm.

[0009] Furthermore, the first auxiliary oil hole is rectangular, circular, or rhomboid.

[0010] Furthermore, the sleeve wall is provided with a second auxiliary oil hole that communicates with the filter cavity.

[0011] Furthermore, the opening size of the second auxiliary oil hole is less than or equal to the opening size of the first auxiliary oil hole, and the opening size of the second auxiliary oil hole is 0.5 mm to 200 mm.

[0012] Furthermore, the second auxiliary oil hole is rectangular, circular, or rhomboid.

[0013] Furthermore, the diameter of the oil filter holes is from 0.5 mm to 200 mm.

[0014] The beneficial effects of this utility model are as follows: by adding a housing with a filter element to the inner cylinder of the shock absorber, the damping oil can flow through the oil filter holes and be filtered by the filter element during the operation of the shock absorber, thereby effectively removing mechanical impurities and oxidation products; thus maintaining the cleanliness of the oil for a long time, and ultimately achieving the effect of delaying component wear and extending the overall life of the shock absorber. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural diagram of a filter for a vibration damper proposed in this utility model; Figure 2 This is a schematic diagram of the main structure of the end cap of a filter for a vibration damper proposed in this utility model; Figure 3 This is a schematic diagram of the main structure of the outer tube of a filter for a vibration damper proposed in this utility model; Figure 4 This is a schematic diagram of the main structure of the sleeve of a filter for a vibration damper proposed in this utility model; Label Explanation: 1. Housing; 11. Sleeve; 111. Second auxiliary oil hole; 12. Oil filter hole; 13. Outer tube; 131. First auxiliary oil hole; 14. End cap; 141. Flange; 2. Filter element. Detailed Implementation

[0016] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0017] Existing shock absorbers lack the ability to purify the damping oil, leading to the continuous accumulation of contaminants such as metal shavings, sludge, and gum, thus shortening their service life. Specifically, contaminants can clog or alter the oil passages of precision valve systems, causing damping force to fail to output as designed, affecting damping performance. Simultaneously, these impurities exacerbate wear on the inner cylinder, seals, and cylinder itself, generating more metal shavings and further contaminating the oil. Metal shavings and other contaminants also catalyze the oxidation process of the damping oil, accelerating the formation of sludge and acidic substances. These acidic substances not only corrode precision valves and metal surfaces but also cause rubber seals to age, harden, and lose elasticity, ultimately leading to oil leaks and creating a vicious cycle. In this embodiment, a housing 1 with a filter element 2 is installed in the inner cylinder of the shock absorber. During operation, the damping oil flows through the filter holes 12 and is filtered by the filter element 2, effectively removing mechanical impurities and oxidation products.

[0018] Please refer to Figure 1 As shown, the present invention provides a filter for a shock absorber, comprising a housing 1 and a filter element 2; the housing 1 includes a sleeve 11 for being fitted onto the inner cylinder of the shock absorber, the housing 1 is provided with an oil filter hole 12, the housing 1 has a filter cavity communicating with the oil filter hole 12, and the filter element 2 is disposed in the filter cavity.

[0019] Working principle: A housing 1 with a filter element 2 is installed in the inner cylinder of the shock absorber, so that the damping oil can flow through the oil filter hole 12 and be filtered by the filter element 2 during the operation of the shock absorber, thereby effectively removing mechanical impurities and oxidation products; thus maintaining the cleanliness of the oil for a long time, and ultimately achieving the effect of delaying component wear and extending the overall life of the shock absorber.

[0020] It is worth noting that filter element 2 can be a carbon-based filter material, a glass fiber filter material, or other filter materials that can filter mechanical impurities and oxidation products in the vibration damping oil.

[0021] In some implementations, please refer to Figure 1 As shown, the housing 1 also includes an outer tube 13, and the sleeve 11 is coaxially arranged with the outer tube 13 and disposed inside the outer tube 13. The filter element 2 is located between the outer tube 13 and the sleeve 11. The filter element 2 is clamped by the outer tube 13 and the sleeve 11 to ensure the stability of the filter element 2 on the housing 1.

[0022] In some implementations, please refer to Figure 1 and Figure 2 As shown, the housing 1 also includes an end cap 14, which has a flange 141 that can be inserted between the sleeve 11 and the outer tube 13. The sleeve 11, the outer tube 13, and the flange 141 enclose the filter cavity, and the end cap 14 has an oil filter hole 12. The end cap 14 is inserted into the sleeve 11 and the outer tube 13 through the flange 141 to prevent the filter element 2 from moving along the axial direction of the sleeve 11 and detaching from the housing 1.

[0023] It is worth noting that the end cap 14 can be fixed by riveting, snap-fitting, welding, bonding and other processes.

[0024] Specifically: In the riveting process, after the flange 141 is inserted into the gap between the sleeve 11 and the outer tube 13, it is riveted along the circumferential contour of the outer tube 13 by relevant riveting equipment, thereby fixing the end cap 14, the sleeve 11 and the outer tube 13 together.

[0025] The end cap 14 is secured by a snap-fit ​​mechanism. A snap-fit ​​is provided on the flange 141 of the end cap 14, and corresponding slots are provided on the sleeve 11 and the outer tube 13. Alternatively, the flange 141 of the end cap 14 can be provided with slots, and corresponding snap-fits can be provided on the sleeve 11 and the outer tube 13. When the flange 141 is inserted into the gap between the sleeve 11 and the outer tube 13, the end cap 14, the sleeve 11 and the outer tube 13 are fixed together by the cooperation of the snap-fit ​​and the slot.

[0026] Welding is performed by ultrasonic welding to connect the end cap 14, sleeve 11, and outer tube 13 while the flange 141 is inserted into the gap between the sleeve 11 and the outer tube 13. Alternatively, after the flange 141 is inserted into the gap between the sleeve 11 and the outer tube 13, the end cap 14, sleeve 11, and outer tube 13 can be connected by laser welding.

[0027] For bonding, after applying glue to the flange 141, insert the flange 141 into the gap between the sleeve 11 and the outer tube 13. After the glue solidifies, the end cap 14, sleeve 11 and outer tube 13 can be fixed together.

[0028] In some implementations, please refer to Figure 3 As shown, the outer tube 13 has a first auxiliary oil hole 131 on its wall that communicates with the filter chamber. By providing the first auxiliary oil hole 131, the damping oil can be filtered by the filter element 2 through the outer tube 13, so that the filter element 2 can be fully utilized and the filter efficiency can be improved.

[0029] In some embodiments, the opening size of the first auxiliary oil hole 131 is from 0.5 mm to 200 mm. By limiting the opening size of the first auxiliary oil hole 131, the filter element 2 is prevented from becoming loose due to direct impact from the damping oil.

[0030] It is worth noting that the first auxiliary oil hole 131 can be rectangular, circular, or diamond-shaped. The outer tube 13 can be made by directly using diamond-shaped crimped wire mesh or square-hole woven wire mesh to obtain the first auxiliary oil hole 131; the outer tube 13 can also be a metal sheet with the first auxiliary oil hole 131 obtained by laser cutting or stamping, and then welded into a tube; the outer tube 13 can also be a PEEK polyether ether ketone material formed by injection molding to form a tube with the first auxiliary oil hole 131.

[0031] The opening size of the first auxiliary oil hole 131 needs to be determined based on the specific specifications of the shock absorber and the forming process of the outer tube 13. Generally, the opening size of the first auxiliary oil hole 131 obtained by using diamond-shaped crimped wire mesh or square-hole woven wire mesh is 0.5mm to 10mm. The opening size of the first auxiliary oil hole 131 formed by injection molding is 10mm to 100mm. The opening size of the first auxiliary oil hole 131 obtained by laser cutting or stamping is 100mm to 200mm.

[0032] In some implementations, please refer to Figure 4 As shown, the sleeve 11 has a second auxiliary oil hole 111 on its wall that communicates with the filter chamber. By providing the second auxiliary oil hole 111, the damping oil can be filtered by the filter element 2 through the sleeve 11, so that the filter element 2 can be fully utilized and the filter efficiency can be improved.

[0033] It is worth noting that since the damping oil can pass through the sleeve 11 and be filtered by the filter element 2, relative sliding may occur between the housing 1 and the inner cylinder of the shock absorber. Therefore, it is necessary to control the offset of the housing 1 within the oil height range between the outer and inner cylinders. This can be achieved by limiting the opening size of the second auxiliary oil hole 111 to be smaller than the opening size of the first auxiliary oil hole 131, thereby reducing the outflow of damping oil entering from the outer pipe 13 from the sleeve 11. Alternatively, a limiting block can be provided on the inner cylinder of the shock absorber to restrict the movement of the housing 1.

[0034] In some embodiments, the opening size of the second auxiliary oil hole 111 is from 0.5 mm to 200 mm. By limiting the opening size of the second auxiliary oil hole 111, the filter element 2 is prevented from becoming loose due to direct impact from the damping oil.

[0035] It is worth noting that the second auxiliary oil hole 111 is rectangular, circular, or diamond-shaped. The sleeve 11 can be made by directly using diamond-shaped crimped wire mesh or square-hole braided wire mesh to obtain the second auxiliary oil hole 111; the sleeve 11 can also be a metal sheet with the second auxiliary oil hole 111 obtained by laser cutting or stamping, and then welded into a pipe; the sleeve 11 can also be a pipe with the second auxiliary oil hole 111 formed by injection molding of PEEK polyether ether ketone material.

[0036] The opening size of the second auxiliary oil hole 111 needs to be determined based on the specific specifications of the shock absorber and the forming process of the sleeve 11. Generally, the opening size of the second auxiliary oil hole 111 obtained using diamond-shaped crimped wire mesh or square-hole woven wire mesh is 0.5mm to 10mm. The opening size of the second auxiliary oil hole 111 formed by injection molding is 10mm to 100mm. The opening size of the second auxiliary oil hole 111 obtained by laser cutting or stamping is 100mm to 200mm.

[0037] In some embodiments, the diameter of the oil filter hole 12 is from 0.5 mm to 200 mm. By limiting the size of the oil filter hole 12, the filter element 2 is prevented from loosening due to direct impact from the damping oil.

[0038] The diameter of the oil filter hole 12 needs to be determined according to the specific specifications of the shock absorber. The larger the internal size of the shock absorber cylinder, the larger the diameter of the oil filter hole 12.

[0039] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A filter for a vibration damper, characterized in that: It includes a housing and a filter element; the housing includes a sleeve for fitting onto the inner cylinder of the shock absorber, the housing has an oil filter hole, the housing has a filter cavity communicating with the oil filter hole, and the filter element is disposed in the filter cavity; The housing also includes an outer tube, the sleeve is coaxially arranged with the outer tube and the sleeve is disposed inside the outer tube, and the filter element is located between the outer tube and the sleeve; The outer tube wall is provided with a first auxiliary oil hole that communicates with the filter cavity.

2. The filter for a vibration damper according to claim 1, characterized in that: The housing also includes an end cap, which has a flange that can be inserted between the sleeve and the outer tube. The sleeve, the outer tube and the flange together form the filter cavity, and the end cap has an oil filter hole.

3. The filter for a vibration damper according to claim 1, characterized in that: The opening size of the first auxiliary oil hole is 0.5 mm to 200 mm.

4. The filter for a vibration damper according to claim 1, characterized in that: The first auxiliary oil hole is rectangular, circular, or rhomboid.

5. The filter for a vibration damper according to claim 1, characterized in that: The casing wall is provided with a second auxiliary oil hole that communicates with the filter cavity.

6. The filter for a vibration damper according to claim 5, characterized in that: The opening size of the second auxiliary oil hole is less than or equal to the opening size of the first auxiliary oil hole, and the opening size of the second auxiliary oil hole is 0.5mm to 200mm.

7. The filter for a vibration damper according to claim 5, characterized in that: The second auxiliary oil hole is rectangular, circular, or rhomboid.

8. The filter for a vibration damper according to claim 1, characterized in that: The diameter of the oil filter holes ranges from 0.5 mm to 200 mm.

Images