Nitrogen shock absorber compression damping adjustment structure

Abstract

A compression damping adjustment structure for a nitrogen shock absorber includes an upper mounting seat, an oil storage cylinder and a nitrogen cylinder are mounted on the upper mounting seat, a compression valve mounting hole, a first oil passage connecting the oil storage cylinder and the compression valve mounting hole, a second oil passage connecting the nitrogen cylinder and the compression valve mounting hole are provided on the upper mounting seat, a compression valve is installed in the compression valve mounting hole, the oil outlet of the first oil passage is located in front of the compression valve, the oil inlet of the second oil passage is located behind the compression valve, an adjustment hole is provided in the center of the compression valve that runs through the front and back, a valve sleeve is installed in the compression valve mounting hole behind the compression valve, and a valve needle with a tapered front end is installed in the center of the valve sleeve through a threaded hole. On the basis of the compression damping valve, a pressure relief channel is added, and the flow area of ​​the pressure relief channel is adjusted, thereby adjusting the oil relief pressure of the shock absorber, thereby adjusting the overall compression damping force of the nitrogen shock absorber.

Description

Technical Field

[0001] The utility model relates to a nitrogen shock absorber, in particular to a compression damping adjustment structure of a nitrogen shock absorber. Background Art

[0002] Nitrogen shock absorbers replace the air in oil-gas shock absorbers with nitrogen, and seal the nitrogen in a nitrogen cylinder through a floating piston, thereby improving the vibration-isolating effectiveness of the nitrogen shock absorbers. They have the advantages of durability, stability, controllability, safety, passability, and comfort.

[0003] The compression damping structure of the nitrogen shock absorber includes an upper mounting seat, an oil storage cylinder and a nitrogen cylinder are mounted on the upper mounting seat, a compression valve mounting hole, a first oil passage connecting the oil storage cylinder and the compression valve mounting hole, and a second oil passage connecting the nitrogen cylinder and the compression valve mounting hole are provided on the upper mounting seat, a compression valve is installed in the compression valve mounting hole, the oil outlet of the first oil passage is located in front of the compression valve, and the oil inlet of the second oil passage is located behind the compression valve. When the nitrogen shock absorber is compressed, the piston rod and the compression piston thereon move upward in the oil storage cylinder, and the shock absorber oil in the upper chamber of the oil storage cylinder enters the nitrogen cylinder through the compression valve. The compression valve generates a damping force on the shock absorber oil flowing through, thereby realizing the compression damping of the nitrogen shock absorber.

[0004] When the compression piston is at a specific compression speed, the compression damping force of the compression damping valve is also specific. Due to the differences in the vibration avoidance effect of road conditions and the passenger's riding feel, the compression damping valve that generates a specific compression damping force at a specific compression speed can no longer meet market demand. Summary of the invention

[0005] The utility model is to solve the above technical problems and provide a compression damping adjustment structure for a nitrogen shock absorber. On the basis of a compression damping valve, a pressure relief channel is added, and the flow area of ​​the pressure relief channel is adjusted, thereby adjusting the oil relief pressure of the shock absorber, thereby adjusting the overall compression damping force of the nitrogen shock absorber.

[0006] The technical solution of the utility model is:

[0007] A compression damping adjustment structure for a nitrogen shock absorber comprises an upper mounting seat, an oil storage cylinder and a nitrogen cylinder are mounted on the upper mounting seat, a compression valve mounting hole, a first oil passage connecting the oil storage cylinder and the compression valve mounting hole, and a second oil passage connecting the nitrogen cylinder and the compression valve mounting hole are provided on the upper mounting seat, a compression valve is installed in the compression valve mounting hole, an oil outlet of the first oil passage is located in front of the compression valve, and an oil inlet of the second oil passage is located behind the compression valve. The structure is special in that: an adjustment hole penetrating front and back is provided in the center of the compression valve, a valve sleeve is installed in the compression valve mounting hole and behind the compression valve, and a valve needle with a tapered front end is installed in the center of the valve sleeve through a threaded hole.

[0008] Furthermore, a knob is installed at the rear end of the valve needle to facilitate the rotation of the valve needle.

[0009] Furthermore, a circumferential positioning mechanism is installed between the knob and the valve sleeve to prevent the valve needle from loosening.

[0010] Furthermore, the circumferential positioning mechanism includes a spring ball radially symmetrically installed at the rear end of the valve sleeve, and a circumferentially evenly arranged pit is provided on the front end surface of the knob. The spring ball is located on the rotation trajectory of the pit. The spring ball is stuck in the pit to circumferentially lock the knob and the valve needle.

[0011] Furthermore, the valve sleeve is pressed against the rear end face of the compression valve, and a radial flow hole is provided on the valve sleeve, and the shock absorber oil reaches the rear of the compression valve through the adjustment hole, the threaded hole and the radial flow hole in sequence.

[0012] Furthermore, a first O-ring is installed between the valve sleeve and the inner wall of the compression valve installation hole to prevent oil leakage.

[0013] Furthermore, a second O-ring is installed between the valve needle and the inner wall of the threaded hole to avoid oil leakage.

[0014] The beneficial effects of the utility model are:

[0015] Since there is an adjustment hole running through the center of the compression valve, a valve sleeve is installed in the compression valve installation hole behind the compression valve, and a valve needle with a tapered front end is installed in the center of the valve sleeve through a threaded hole. When the nitrogen shock absorber is compressed, the piston rod and the compression piston on it move upward in the oil storage cylinder. A part of the shock absorber oil in the upper chamber of the oil storage cylinder enters the nitrogen cylinder through the compression valve, and the other part of the shock absorber oil enters the nitrogen cylinder through the first oil channel, the adjustment hole, and the threaded hole. The adjustment hole reduces the compression damping force of the nitrogen shock absorber during compression movement by means of pressure relief. The valve needle is adjusted forward and backward by the thread, and the gap between the conical surface of the front end of the valve needle and the adjustment hole is adjusted, thereby adjusting the size of the shock absorber oil relief pressure, thereby adjusting the overall compression damping force of the nitrogen shock absorber. According to the difference in the vibration avoidance effect of road conditions and the body feeling of the occupants, different compression damping forces are generated at specific compression speeds to meet market demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 yes Figure 1 Enlarged view of part A in the middle;

[0018] In the figure: 1-upper mounting seat, 2-oil storage cylinder, 3-nitrogen cylinder, 4-compression valve mounting hole, 5-first oil channel, 6-second oil channel, 7-compression valve, 8-adjusting hole, 9-valve sleeve, 10-first O-ring, 11-threaded hole, 12-valve needle, 13-knob, 14-spring ball, 15-pit, 16-radial flow hole, 17-second O-ring. DETAILED DESCRIPTION

[0019] like Figure 1-Figure 2 As shown, a compression damping adjustment structure of a nitrogen shock absorber comprises an upper mounting seat 1, an oil storage cylinder 2 and a nitrogen cylinder 3 are mounted on the upper mounting seat 1, a compression valve 7 mounting hole 4, a first oil passage 5 connecting the oil storage cylinder 2 and the compression valve mounting hole 4, a second oil passage 6 connecting the nitrogen cylinder 3 and the compression valve 7 mounting hole 4 are provided on the upper mounting seat 1, a compression valve 7 is installed in the compression valve mounting hole 4, an oil outlet of the first oil passage 5 is located in front of the compression valve 7, an oil inlet of the second oil passage 6 is located behind the compression valve 7, an adjustment hole 8 penetrating front and back is provided in the center of the compression valve 7, a valve sleeve 9 is installed in the compression valve mounting hole 4 and located behind the compression valve 7, and a valve sleeve 9 is provided in the valve sleeve 9. A first O-ring 10 is installed between the valve sleeve 9 and the inner wall of the compression valve mounting hole 4, the valve sleeve 9 is pressed against the rear end face of the compression valve 7, a valve needle 12 with a tapered front end is installed through a threaded hole 11 in the center of the valve sleeve 9, a second O-ring 17 is installed between the valve needle 12 and the inner wall of the threaded hole 11, a knob 13 is installed at the rear end of the valve needle 12, and a circumferential positioning mechanism is installed between the knob 13 and the valve sleeve 9, the circumferential positioning mechanism includes a spring ball 14 radially symmetrically installed at the rear end of the valve sleeve 9, circumferentially uniformly arranged pits 15 are provided on the front end face of the knob 13, the spring ball 14 is located on the rotation trajectory of the pit 15, and a radial flow hole 16 is provided on the valve sleeve 9.

[0020] The working principle of the utility model is:

[0021] When the nitrogen shock absorber is in compression motion, the piston rod and the compression piston thereon move upward in the oil storage cylinder 2, and a part of the shock absorber oil in the upper chamber of the oil storage cylinder 2 enters the nitrogen cylinder 3 through the compression valve 7, and the other part of the shock absorber oil enters the nitrogen cylinder 3 through the first oil channel 5, the adjusting hole 8, the threaded hole 11, and the radial flow hole 16. The adjusting hole 8 reduces the compression damping force of the nitrogen shock absorber during compression motion by means of pressure relief, and the valve needle 12 is adjusted by the thread forward and backward, and the gap between the conical surface of the front end of the valve needle 12 and the adjusting hole 8 is adjusted, thereby adjusting the shock absorber oil relief pressure, thereby adjusting the overall compression damping force of the nitrogen shock absorber.

[0022] The above are only specific embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A compression damping adjustment structure of a nitrogen shock absorber, comprising an upper mounting seat, an oil storage cylinder and a nitrogen cylinder are mounted on the upper mounting seat, a compression valve mounting hole, a first oil passage connecting the oil storage cylinder and the compression valve mounting hole, a second oil passage connecting the nitrogen cylinder and the compression valve mounting hole are provided on the upper mounting seat, a compression valve is mounted in the compression valve mounting hole, an oil outlet of the first oil passage is located in front of the compression valve, and an oil inlet of the second oil passage is located behind the compression valve, characterized in that: A regulating hole running through the front and back is arranged in the center of the compression valve, a valve sleeve is installed in the compression valve installation hole behind the compression valve, and a valve needle with a tapered front end is installed in the center of the valve sleeve through a threaded hole.

2. The compression damping adjustment structure of the nitrogen shock absorber according to claim 1 is characterized in that: Install the knob behind the valve stem.

3. The compression damping adjustment structure of the nitrogen shock absorber according to claim 1, characterized in that: A circumferential positioning mechanism is installed between the knob and the valve sleeve.

4. The compression damping adjustment structure of the nitrogen shock absorber according to claim 3 is characterized in that: The circumferential positioning mechanism includes a spring ball that is radially symmetrically installed at the rear end of the valve sleeve. The front end surface of the knob is provided with circumferentially evenly arranged pits, and the spring ball is located on the rotation trajectory of the pits.

5. The compression damping adjustment structure of the nitrogen shock absorber according to claim 1, characterized in that: The valve sleeve is pressed against the rear end surface of the compression valve, and radial flow holes are arranged on the valve sleeve.

6. The compression damping adjustment structure of the nitrogen shock absorber according to claim 1, characterized in that: A first O-ring is installed between the valve sleeve and the inner wall of the compression valve installation hole.

7. The compression damping adjustment structure of the nitrogen shock absorber according to claim 1, characterized in that: Install a second O-ring between the valve needle and the inner wall of the threaded hole.

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