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 is provided on the upper mounting seat in the nitrogen cylinder, a compression valve is installed in the compression valve mounting hole, a blind hole is provided on the upper mounting seat, a circumferentially rotating valve core is installed in the blind hole, a cam is provided at the inner end of the valve core, a first oil passage connecting the oil storage cylinder and the blind 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, a third oil passage connecting the first oil passage and the nitrogen cylinder is provided on the upper mounting seat, and the oil inlet of the third oil passage corresponds to the cam position of the valve core. 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 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 blind hole is arranged on the upper mounting seat, a circumferentially rotating valve core is mounted in the blind hole, a cam is arranged at the inner end of the valve core, a first oil passage connecting the oil storage cylinder and the blind 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, a third oil passage connecting the first oil passage and the nitrogen cylinder is arranged on the upper mounting seat, and an oil inlet of the third oil passage corresponds to the cam position of the valve core.

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

[0009] Furthermore, an O-ring is installed between the valve core and the inner wall of the blind hole to prevent oil leakage.

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

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

[0012] Since a blind hole is provided on the upper mounting seat, a circumferentially rotating valve core is installed in the blind hole, a cam is provided at the inner end of the valve core, a first oil passage connecting the oil storage cylinder and the blind 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 oil inlet of the third oil passage corresponds to the cam position of the valve core. The valve core is rotated circumferentially, and the size of the oil inlet of the third oil passage is changed through the cam at the inner end of the valve core, thereby adjusting the size of the shock absorber oil leakage pressure, thereby adjusting the overall compression damping force of the nitrogen shock absorber, and generating different compression damping forces at a specific compression speed according to the difference in the vibration avoidance effect of the road conditions and the body feeling of the occupants, so as to meet the market demand. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] Figure 2 yes Figure 1 Left view of the middle valve core;

[0015] In the figure: 1-upper mounting seat, 2-oil storage cylinder, 3-nitrogen cylinder, 4-compression valve mounting hole, 5-compression valve, 6-blind hole, 7-valve core, 8-cam, 9-O-ring, 10-circlip, 11-knob, 12-first oil channel, 13-second oil channel, 14-third oil channel. DETAILED DESCRIPTION

[0016] 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 mounting hole 4 is provided on the upper mounting seat 1 and located in the nitrogen cylinder 3, a compression valve is installed in the compression valve mounting hole 4, a blind hole 6 is provided on the upper mounting seat 1, a valve core 7 that rotates circumferentially is installed in the blind hole 6, a cam is provided at the inner end of the valve core 7, an O-ring 9 is installed between the valve core 7 and the inner wall of the blind hole 6, a retaining ring 10 is installed at the outer end of the valve core 7 in the blind hole 6, a knob 11 is installed on the valve core 7, a first oil passage 12 that connects the oil storage cylinder 2 and the blind hole 6 is provided on the upper mounting seat 1, a second oil passage 13 that connects the first oil passage 12 and the compression valve mounting hole 4 is provided on the upper mounting seat 1, and a third oil passage 14 that connects the first oil passage 12 and the nitrogen cylinder 3 is provided on the upper mounting seat 1, and the oil inlet of the third oil passage 14 corresponds to the cam position of the valve core 7.

[0017] The working principle of the utility model is:

[0018] 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 12, the second oil passage 13 and the compression valve to enter the nitrogen cylinder 3 in sequence, and another part of the shock absorber oil passes through the first oil passage 12 and the third oil passage 14 to enter the nitrogen cylinder 3. The valve core 7 is rotated circumferentially by the knob 11, and the size of the oil inlet of the third oil passage 14 is changed by the cam at the inner end of the valve core 7, thereby adjusting the size of the shock absorber oil leakage pressure, thereby adjusting the overall compression damping force of the nitrogen shock absorber.

[0019] 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 blind hole is provided on the upper mounting seat, a valve core that rotates circumferentially is installed in the blind hole, a cam is provided at the inner end of the valve core, a first oil passage that connects the oil storage cylinder and the blind hole is provided on the upper mounting seat, a second oil passage that connects the first oil passage and the compression valve mounting hole is provided on the upper mounting seat, and a third oil passage that connects the first oil passage and the nitrogen cylinder is provided on the upper mounting seat, and the oil inlet of the third oil passage corresponds to the cam position of the valve core.

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 core.

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 core and the inner wall of the blind 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 blind hole at the outer end of the valve core.

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