Compression damping adjusting structure of nitrogen shock absorber

Abstract

A compression damping adjusting structure of a nitrogen shock absorber comprises an upper installation seat, an oil storage cylinder and a nitrogen cylinder are installed on the upper installation seat, a compression valve installation hole is formed in the portion, located in the nitrogen cylinder, of the upper installation seat, a compression valve is installed in the compression valve installation hole, a threaded hole is formed in the upper installation seat, and a valve needle is installed in the threaded hole through threads. A first oil duct for communicating the oil storage cylinder with the threaded hole, a second oil duct for communicating the first oil duct with the compression valve mounting hole and a third oil duct for communicating the first oil duct with the nitrogen cylinder are arranged on the upper mounting seat. 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, so that the oil relief pressure of the shock absorber is adjusted, and the overall compression damping force of the nitrogen shock absorber is adjusted.

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 is provided on the upper mounting seat in the nitrogen cylinder, a compression valve is installed in the compression valve mounting hole, and an oil passage connecting the oil storage cylinder and the compression valve mounting hole is provided on the upper mounting seat. 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 oil passage and the compression valve, and 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 damping force of the compression 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 is arranged on the upper mounting seat in the nitrogen cylinder, a compression valve is mounted in the compression valve mounting hole, and the special features thereof are: a threaded hole is arranged on the upper mounting seat, a valve needle is mounted in the threaded hole through a thread, a first oil passage connecting the oil storage cylinder and the threaded hole is arranged on the upper mounting seat, a second oil passage connecting the first oil passage and the compression valve mounting hole is arranged on the upper mounting seat, and a third oil passage connecting the first oil passage and the nitrogen cylinder is arranged on the upper mounting seat.

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

[0009] Furthermore, an O-ring is installed between the valve needle and the inner wall of the threaded hole to avoid oil leakage.

[0010] Furthermore, a retaining ring is installed in the threaded hole at the outer end of the valve needle to prevent the valve needle from falling out of the threaded hole.

[0011] The beneficial effects of the utility model are:

[0012] Since a threaded hole is provided on the upper mounting seat, a valve needle is installed in the threaded hole through a thread, a first oil passage connecting the oil storage cylinder and the threaded hole is provided on the upper mounting seat, a second oil passage connecting the first oil passage and the compression valve mounting hole is provided on the upper mounting seat, and a third oil passage connecting the first oil passage and the nitrogen cylinder is provided on the upper mounting seat, and the valve needle is adjusted inside and outside the thread to block the oil inlet of the third oil passage, thereby adjusting the size of the oil inlet of the third oil passage, and then adjusting the size of the oil leakage pressure of the shock absorber, 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 a specific compression speed to meet market demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] In the figure: 1-upper mounting seat, 2-oil storage cylinder, 3-nitrogen cylinder, 4-compression valve mounting hole, 5-compression valve, 6-threaded hole, 7-valve needle, 8-knob, 9-O-ring, 10-circlip, 11-first oil channel, 12-second oil channel, 13-third oil channel. DETAILED DESCRIPTION

[0015] like Figure 1 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 mounting hole 4 is provided on the upper mounting seat 1 and located in the nitrogen cylinder 3, a compression valve 5 is installed in the compression valve mounting hole 4, a threaded hole 6 is provided on the upper mounting seat 1, a valve needle 7 is installed in the threaded hole 6 through a thread, a knob 8 is installed on the valve needle 7, an O-ring 9 is installed between the valve needle 7 and the inner wall of the threaded hole 6, a retaining ring 10 is installed at the outer end of the valve needle 7 in the threaded hole 6, a first oil passage 11 is provided on the upper mounting seat 1 to connect the oil storage cylinder 2 and the threaded hole 6, a second oil passage 12 is provided on the upper mounting seat 1 to connect the first oil passage 11 and the compression valve mounting hole 4, and a third oil passage 13 is provided on the upper mounting seat 1 to connect the first oil passage 11 and the nitrogen cylinder 3.

[0016] The working principle of the utility model is:

[0017] 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 passes through the first oil passage 11 and the second oil passage 12 in sequence and passes through the compression valve 5 to enter the nitrogen cylinder 3, and another part of the shock absorber oil passes through the first oil passage 11 and the third oil passage 13 to enter the nitrogen cylinder 3, and the oil inlet of the third oil passage 13 is blocked by the threaded inner and outer regulating valve needle 7, thereby adjusting the size of the oil inlet of the third oil passage 13, and then adjusting the size of the shock absorber oil leakage pressure, thereby adjusting the overall compression damping force of the nitrogen shock absorber.

[0018] 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 is provided on the upper mounting seat in the nitrogen cylinder, a compression valve is mounted in the compression valve mounting hole, and the characteristics are: A threaded hole is provided on the upper mounting seat, a valve needle is installed in the threaded hole through a thread, a first oil passage connecting the oil storage cylinder and the threaded hole is provided on the upper mounting seat, a second oil passage connecting the first oil passage and the compression valve mounting hole is provided on the upper mounting seat, and a third oil passage connecting the first oil passage and the nitrogen cylinder is provided on the upper mounting seat.

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

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

4. The compression damping adjustment structure of the nitrogen shock absorber according to claim 1, characterized in that: Install the retaining ring in the threaded hole at the outer end of the valve needle.

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