Adjusting sleeve of shock absorber

Abstract

The adjusting sleeve of the shock absorber comprises an adjusting part located on the upper portion and an installing part located on the lower portion, the adjusting part and the installing part are both cylindrical and are coaxially arranged, the upper end face of the adjusting part serves as a limiting end face of a piston, and a skirt edge used for fixing is arranged on the periphery of the lower end of the installing part. A guide groove is formed around the inner circumference of the upper end of the mounting portion, a guide ring matched with the guide groove in shape and in axial sliding fit with the guide groove is arranged at the lower end of the adjusting portion, and an adjusting mechanism for adjusting the axial relative position of the adjusting portion and the mounting portion is arranged between the adjusting portion and the mounting portion. By the adoption of the scheme, the adjusting sleeve of the shock absorber can accurately adjust movement of the piston.

Description

Technical Field

[0001] The utility model relates to the field of shock absorbers, in particular to an adjusting sleeve of a shock absorber. Background Art

[0002] Shock absorbers, also known as shock absorbers, are mainly used to quickly attenuate the vibration of the frame and body of the vehicle, and improve the smoothness and comfort of the car's driving. When the frame (or body) and the axle are vibrated and move relative to each other, the piston in the shock absorber will move up and down, and the oil in the shock absorber will repeatedly flow from one cavity to another through different pores. In this process, the friction between the pore wall and the oil and the internal friction between the oil molecules form a damping force on the vibration, converting the vibration energy of the car into oil heat energy, which is then absorbed by the shock absorber and dissipated into the atmosphere.

[0003] In order to adjust the travel of the piston, an adjustment sleeve is set in the shock absorber. One end of the adjustment sleeve is used as the installation end and is provided with a skirt for fixing (fixed between the shock absorber cylinder body and the cylinder head), and the other end is used as the limit end and is located on the moving track of the piston. The through hole in the middle of the adjustment sleeve is used for the piston rod connected to the piston to pass through. When the piston moves to the travel limit, the piston will abut against the limit end of the adjustment sleeve.

[0004] There are certain disadvantages in the adjusting sleeve of such a structure. Generally, the piston stroke is changed by replacing the adjusting sleeve of different lengths. Such replacement not only increases the extra cost, but the replaced adjusting sleeve is generally of standard size and cannot be precisely customized according to the driver's needs. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an adjusting sleeve of a shock absorber formed by the movement of a piston which can accurately adjust the shock absorber.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: it includes an adjusting part located at the top and a mounting part located at the bottom, the adjusting part and the mounting part are both cylindrical and coaxially arranged, the upper end face of the adjusting part serves as a limiting end face of the piston, the outer periphery of the lower end of the mounting part is provided with a skirt for fixing, the inner periphery of the upper end of the mounting part is surrounded by a guide groove, the lower end of the adjusting part is provided with a guide ring that is adapted to the shape of the guide groove and axially slidingly matched, and an adjusting mechanism for adjusting the axial relative position of the adjusting part and the mounting part is provided between the adjusting part and the mounting part.

[0007] By adopting the above technical solution, an adjustment mechanism is added, and the piston stroke is adjusted by adjusting the axial relative position of the adjustment part and the mounting part. Stepless adjustment can be performed as needed, and the adjustment is more precise. At the same time, it replaces the previous adjustment method of replacing the adjustment sleeve, thereby reducing costs. Secondly, the guide groove and the guide ring cooperate to serve as adjustment guides for the adjustment part and the mounting part, making the adjustment more accurate and convenient. In addition, the guide ring is placed on the inner side of the mounting part to make the structure of the adjusted adjustment sleeve more stable.

[0008] The utility model is further configured as follows: the adjustment mechanism includes a base and an adjustment seat, the number of the bases is three and they are equidistantly arranged circumferentially on the inner periphery of the lower end of the adjustment part, the adjustment seat is fixed to the inner periphery of the lower end of the guide ring and corresponds one to one to the base, the base is axially provided with an adjustment screw passing through the adjustment seat, the adjustment screw is provided with a limiting nut above the adjustment seat, and a buffer nut is provided below the adjustment seat, and the adjustment screw sleeve is provided with a buffer spring compressed on the buffer nut and the adjustment seat.

[0009] By adopting the above technical solution, the adjusting screw cooperates with the buffer nut and the limit nut to limit the relative position of the base and the adjusting seat, that is, the relative position of the adjusting part and the mounting part is adjusted. The buffer spring between the buffer nut and the adjusting part effectively reduces the impact generated when the piston collides with the adjusting part, thereby protecting the piston and the adjusting sleeve. In addition, the buffer nut can also adjust the compression degree of the buffer spring through the distance with the adjusting part, that is, adjust the buffering force, and adjust it according to actual needs to obtain the shock absorption effect required by the driver.

[0010] The utility model is further configured as follows: the guide ring is equidistantly provided with three oil passages which are staggered with the adjustment seat along the circumferential direction, the oil passages extend axially to the lower end face of the guide ring, and the portion of the oil passages located above the mounting portion serves as an oil passage connecting the inside and outside of the adjustment portion.

[0011] By adopting the above technical solution, as the length of the adjusting sleeve becomes longer, more hydraulic oil will be hindered from flowing freely. Therefore, an oil passage is added at the connection between the guide ring and the mounting portion. The oil passage formed by the oil passage will automatically adjust its size according to the overall length of the adjusting sleeve to ensure the damping effect of the hydraulic oil.

[0012] The utility model is further configured as follows: the upper end surface of the adjusting part is provided with a wear layer made of rubber material.

[0013] By adopting the above technical solution, when the piston reaches the stroke limit position and contacts the adjusting part, it will contact the wear layer, thereby protecting the piston and extending the service life of the adjusting sleeve.

[0014] The utility model is further configured as follows: a sealing groove is arranged around the outer periphery above the skirt, the inner side wall of the sealing groove gradually tilts downward as it moves away from the center of the adjustment portion, a sealing ring is arranged in the sealing groove, the thickness of the sealing ring is greater than the sealing groove, and the inner side wall of the sealing ring is parallel to the inner side wall of the sealing groove.

[0015] By adopting the above technical solution, since the shock absorber cylinder is in a high-pressure state, the internal hydraulic pressure and the compression force of the shock absorber cylinder and the cylinder head are reasonably utilized, so that the sealing ring automatically expands along the inner wall of the sealing groove and fills the gap, thereby obtaining a better sealing effect.

[0016] The utility model is further configured as follows: the outer peripheral surface of the guide ring is provided with scales along the axial direction, and the upper end surface of the mounting portion serves as a pointer of the scales.

[0017] By adopting the above technical solution, scales are added to the outer circumference of the guide ring, and the upper end surface of the mounting portion is reasonably used as a pointer, so that it is convenient to quickly and accurately adjust to the required position. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of a specific implementation of the utility model;

[0019] Figure 2 It is a three-dimensional cross-sectional view of a specific implementation method of the utility model. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] like Figure 1 — Figure 2As shown, the utility model discloses an adjustment sleeve of a shock absorber, comprising an adjustment portion 1 located at the top and a mounting portion 2 located at the bottom, the adjustment portion 1 and the mounting portion 2 are both cylindrical and coaxially arranged, the upper end surface of the adjustment portion 1 serves as a limiting end surface 11 of the piston, the outer periphery of the lower end of the mounting portion 2 is provided with a skirt 21 for fixing, the inner periphery of the upper end of the mounting portion 2 is surrounded by a guide groove 22, the lower end of the adjustment portion 1 is provided with a guide ring 12 that matches the shape of the guide groove 22 and axially slides, and a guide ring 12 is provided between the adjustment portion 1 and the mounting portion 2. An adjusting mechanism for adjusting the axial relative position of the two is added. By adjusting the axial relative position of the adjusting part 1 and the mounting part 2, the piston stroke is adjusted. Stepless adjustment can be performed as needed, and the adjustment is more precise. At the same time, it replaces the previous adjustment method of replacing the adjusting sleeve to reduce costs. Secondly, the guide groove 22 and the guide ring 12 cooperate as adjustment guides for the adjusting part 1 and the mounting part 2, making the adjustment more accurate and convenient. In addition, the guide ring 12 is placed on the inner side of the mounting part to make the adjusted adjusting sleeve structure more stable.

[0023] The adjustment mechanism includes a base 23 and an adjustment seat 13. The number of bases 23 is three and they are equidistantly arranged on the inner periphery of the lower end of the adjustment portion 1 along the circumferential direction. The adjustment seat 13 is fixed to the inner periphery of the lower end of the guide ring 12 and corresponds to the base 23 one by one. The base 23 is axially provided with an adjustment screw 24 that passes through the adjustment seat 13. The adjustment screw 24 is provided with a limited position nut 241 above the adjustment seat 13, and a buffer nut 242 is provided below the adjustment seat 13. The adjustment screw 24 is sleeved with a buffer spring 243 compressed on the buffer nut 242 and the adjustment seat 13. The screw 24 cooperates with the buffer nut 242 and the limit nut 241 to limit the relative position of the base 23 and the adjustment seat 13, that is, to adjust the relative position of the adjustment part 1 and the mounting part 2. The buffer spring 243 between the buffer nut 242 and the adjustment part 1 effectively reduces the impact generated when the piston collides with the adjustment part 1, and protects the piston and the adjustment sleeve. In addition, the buffer nut 242 can also adjust the compression degree of the buffer spring 243 by the distance from the adjustment part 1, that is, adjust the buffering force, and adjust it according to actual needs to obtain the shock absorption effect required by the driver.

[0024] The guide ring 12 is circumferentially equidistantly provided with three oil passages 121 which are staggered with the adjustment seat 13. The oil passages 121 extend axially to the lower end face of the guide ring 12. The portion of the oil passages 121 located above the mounting portion 2 serves as an oil passage 122 connecting the inside and outside of the adjustment portion 1. As the length of the adjustment sleeve becomes longer, more hydraulic oil will be hindered from flowing freely. Therefore, an oil passage 121 is additionally provided at the junction of the guide ring 12 and the mounting portion 2. The oil passage 122 formed by the oil passage 121 will automatically adjust its size according to the overall length of the adjustment sleeve to ensure the damping effect of the hydraulic oil.

[0025] The upper end surface of the adjusting part 1 is provided with a wear layer 3 made of rubber material. When the piston reaches the stroke limit position and contacts the adjusting part 1, it contacts the wear layer 3, thereby protecting the piston and extending the service life of the adjusting sleeve.

[0026] A sealing groove 211 is arranged around the outer periphery above the skirt 21, and the inner wall of the sealing groove 211 gradually tilts downward as it moves away from the center of the adjusting portion 1. A sealing ring 4 is arranged in the sealing groove 211, and the thickness of the sealing ring 4 is greater than that of the sealing groove 211. The inner wall of the sealing ring 4 is parallel to the inner wall of the sealing groove 211. Since the shock absorber cylinder is in a high-pressure state, the internal hydraulic pressure and the pressing force of the shock absorber cylinder and the cylinder head are reasonably used to make the sealing ring 4 automatically expand along the inner wall of the sealing groove 211 and fill the gap, thereby obtaining a better sealing effect.

[0027] The outer circumference of the guide ring 12 is provided with a scale 123 along the axial direction, and the upper end surface of the mounting portion 2 serves as a pointer of the scale 123. The scale 123 is added to the outer circumference of the guide ring 12, and the upper end surface of the mounting portion is reasonably used as a pointer, which facilitates quick and accurate adjustment to the desired position.

Claims

1. An adjusting sleeve for a shock absorber, characterized in that: It includes an adjusting part located at the top and a mounting part located at the bottom, the adjusting part and the mounting part are both cylindrical and coaxially arranged, the upper end face of the adjusting part serves as a limiting end face of the piston, the outer periphery of the lower end of the mounting part is provided with a skirt for fixing, the inner periphery of the upper end of the mounting part is surrounded by a guide groove, the lower end of the adjusting part is provided with a guide ring which is adapted to the shape of the guide groove and cooperates with axial sliding, and an adjusting mechanism for adjusting the axial relative position of the adjusting part and the mounting part is provided between the adjusting part and the mounting part.

2. The adjusting sleeve of the shock absorber according to claim 1, characterized in that: The adjustment mechanism includes a base and an adjustment seat. There are three bases and they are equidistantly arranged along the circumferential direction on the inner circumference of the lower end of the adjustment part. The adjustment seat is fixed to the inner circumference of the lower end of the guide ring and corresponds to the base one by one. The base is axially provided with an adjustment screw passing through the adjustment seat. The adjustment screw is provided with a limit nut above the adjustment seat, and a buffer nut is provided below the adjustment seat. The adjustment screw sleeve is provided with a buffer spring compressed on the buffer nut and the adjustment seat.

3. The adjusting sleeve of the shock absorber according to claim 1, characterized in that: The guide ring is circumferentially equidistantly provided with three oil passages which are staggered with the adjustment seat. The oil passages extend axially to the lower end face of the guide ring. The portion of the oil passages located above the mounting portion serves as an oil passage connecting the inside and outside of the adjustment portion.

4. The adjusting sleeve of the shock absorber according to claim 1, characterized in that: The upper end surface of the adjusting part is provided with a wear layer made of rubber material.

5. The adjusting sleeve of the shock absorber according to claim 1, characterized in that: A sealing groove is arranged around the outer periphery above the skirt, and the inner wall of the sealing groove gradually tilts downward as it moves away from the center of the adjustment part. A sealing ring is arranged in the sealing groove, and the thickness of the sealing ring is greater than that of the sealing groove. The inner wall of the sealing ring is parallel to the inner wall of the sealing groove.

6. The adjusting sleeve of the shock absorber according to claim 1, characterized in that: The outer peripheral surface of the guide ring is provided with scales along the axial direction, and the upper end surface of the mounting portion serves as a pointer of the scales.

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