Gas adjustable shock absorber

Abstract

This invention relates to a gas-adjustable shock absorber, comprising: a cylinder having an internal accommodating space; an oil-gas separator piston slidably disposed within the accommodating space, dividing the accommodating space into an oil chamber and a gas chamber, the oil chamber being filled with a predetermined volume of damping oil, and the gas chamber being filled with a predetermined volume of nitrogen gas; a piston rod including a first rod body and a piston disposed on the first rod body, the first rod body being slidably disposed on the top of the cylinder, causing the piston to slide within the oil chamber, dividing the oil chamber into a first oil chamber and a second oil chamber, the piston being provided with... At least one through-hole through which the damping oil flows between the first oil chamber and the second oil chamber; and a chamber adjustment module comprising a sliding adjustment block and an adjustment drive module connected to the sliding adjustment block, the sliding adjustment block being slidably disposed in the chamber and having a predetermined distance between it and the oil-gas separator piston, the adjustment drive module being located outside the cylinder body, by adjusting the adjustment drive module, causing the sliding adjustment block to move toward or away from the oil-gas separator piston, thereby changing the effective volume of nitrogen gas in the chamber and the pressure of nitrogen gas.

Description

[Technical Field]

[0001] This invention relates to a vehicle shock absorber, and more particularly to a gas-adjustable shock absorber that combines adjustable damping and adjustable air chamber, thereby producing different damping effects by adjusting the volume of the air chamber. [Previous Technology]

[0002] The spring and damping design of the shock absorber are the most important components. The spring supports the vehicle body and absorbs and buffers the vibration of the vehicle body from the uneven road surface with its elastic movement, and maintains the continuous contact between the tire and the road surface; while the damping is responsible for absorbing the excessive bouncing force of the spring, so that the driving is more stable.

[0003] In currently used shock absorber damping designs, the oil chamber and air chamber are separated by an up-and-down movable oil-gas separation valve. The oil chamber and air chamber are filled with damping oil and gas (nitrogen) respectively. The downward stroke of the shock absorber piston rod is achieved by the flow of damping oil between the valves of the piston head. The damping oil below the piston head is pressurized and pushes the oil-gas separation valve downward, which compresses the compressed gas in the air chamber 72. Due to the compression and expansion of the gas, the piston rod can move back and forth. The disadvantage of conventional shock absorbers is that the shaft length of the air chamber is insufficient, resulting in insufficient compression and expansion of the gas. When the vehicle travels on bumpy roads, the vehicle body will experience a noticeable, inelastic, and stiff vibration.

[0004] In view of this, how to eliminate the above-mentioned deficiencies is the technical difficulty that the inventor of this case wants to solve; therefore, based on years of experience in related industries, the inventor of this case has devoted himself to research and improvement for many years and finally successfully developed this case, thus giving birth to this invention to improve its effectiveness. [Summary of the Invention]

[0005] In view of the above-mentioned disadvantages, the present invention provides a gas-adjustable shock absorber, comprising: a cylinder having an internal accommodating space; an oil-gas separator piston slidably disposed within the accommodating space, dividing the accommodating space into an oil chamber and a gas chamber, the oil chamber being filled with a predetermined volume of damping oil, and the gas chamber being filled with a predetermined volume of nitrogen gas; a piston rod comprising a first rod body and a piston disposed on the first rod body, the first rod body being slidably disposed on the top of the cylinder, causing the piston to slide within the oil chamber, and dividing the oil chamber into a first oil chamber and a second oil chamber. The cylinder has a piston with at least one through hole through which the damping oil flows between the first oil chamber and the second oil chamber; and a gas chamber adjustment module, which includes a sliding adjustment block and an adjustment drive module connected to the sliding adjustment block. The sliding adjustment block is slidably disposed in the gas chamber and is at a predetermined distance from the oil-gas separator piston. The adjustment drive module is located outside the cylinder body. By adjusting the adjustment drive module, the sliding adjustment block is moved toward or away from the oil-gas separator piston, thereby changing the effective volume and pressure of the nitrogen gas in the gas chamber.

[0006] Preferably, the inner wall of the cylinder is provided with a plurality of opposing sliding grooves, and the sliding adjustment block further includes a plurality of guide parts and at least one magnetic element, each of the guide parts being slidably disposed in the sliding groove; the adjustment drive module includes an electromagnetic ring, the electromagnetic ring being disposed at the bottom of the outer side of the cylinder and including an energized coil, the energized coil generating a magnetic field that penetrates the cylinder, the direction or intensity of the magnetic field being adjusted by rotating the electromagnetic ring, the magnetic field interacting with the magnetic element to attract or repel the sliding adjustment block to move along the sliding groove.

[0007] Preferably, the sliding adjusting block is an airtight piston, the adjusting drive module is a screw, and the other end of the adjusting drive module is provided with a rotating handle. The adjusting drive module is screwed to the bottom of the cylinder body, the sliding adjusting block is located in the gas chamber, and the rotating handle is located outside the cylinder body. By rotating the rotating handle, the sliding adjusting block is moved toward or away from the oil-gas separating piston, thereby changing the effective volume of nitrogen in the gas chamber and the pressure of nitrogen.

[0008] Preferably, the outer side of the adjustment drive module is provided with an airtight element, which is a sealing ring, a bellows seal or a packing seal.

[0009] Preferably, the adjustment drive module further includes a locking module to fix the sliding adjustment block at a predetermined position, thereby preventing the sliding adjustment block from moving.

[0010] Preferably, the sliding adjustment block is provided with a sealing ring so that the outer diameter of the sliding adjustment block is tightly fitted with the inner wall of the cylinder, thereby ensuring the airtightness of the air chamber.

[0011] Preferably, the through hole is provided with a throttling device and a knob connected to the throttling device. Rotating the knob drives the throttling device to expand or shrink the through hole, thereby controlling the flow rate of the damping oil between the first oil chamber and the second oil chamber.

[0012] Preferably, the nitrogen pressure in the chamber is in the range of 2 to 10 bar.

Implementation Method

[0013] To facilitate the explanation of the content and effects of the present invention, specific embodiments are listed below in conjunction with the figures. Please refer to the first figure for the gas adjustable shock absorber of the present invention, which includes:

[0014] A cylinder block 10, which has an internal accommodating space 11.

[0015] An oil-gas separator piston 20 is slidably disposed in the accommodating space 11 and divides the accommodating space into an oil chamber 111 and a gas chamber 112. The oil chamber 111 is filled with a predetermined amount of damping oil, and the gas chamber 112 is filled with a predetermined amount of nitrogen gas.

[0016] A piston rod 30 includes a first rod body 31 and a piston 32 disposed at one end of the first rod body 31. The first rod body 31 is slidably disposed on the top of the cylinder body 10, so that the piston 32 is slidably disposed in the oil chamber 111, and the oil chamber 111 is divided into a first oil chamber and a second oil chamber. The piston 32 is provided with at least one through hole (not shown in the figure), and the damping oil flows between the first oil chamber and the second oil chamber through the through hole.

[0017] The through hole is provided with a throttling device and a knob 321 connected to the throttling device. Rotating the knob 321 drives the throttling device to expand or shrink the through hole, thereby controlling the flow rate of the damping oil between the first oil chamber and the second oil chamber.

[0018] Please refer to Figures 1 to 4. A gas chamber adjustment module 40 includes a sliding adjustment block 41 and an adjustment drive module 42 connected to the sliding adjustment block 41. The sliding adjustment block 41 is slidably disposed in the gas chamber 112 and has a predetermined distance between it and the oil-gas separator piston 20. The adjustment drive module 42 is located outside the cylinder body 10. By adjusting the adjustment drive module 42, the sliding adjustment block 41 is moved toward or away from the oil-gas separator piston 20, thereby changing the effective volume of nitrogen gas in the gas chamber 112 and the pressure of nitrogen gas.

[0019] The sliding adjustment block 41 is provided with a sealing ring, so that the outer diameter of the sliding adjustment block 41 is tightly fitted with the inner wall of the cylinder 10, thereby ensuring the airtightness of the air chamber 112.

[0020] The air chamber regulating module 40 has the following two embodiments, but is not limited thereto:

[0021] 1. The inner wall of the cylinder 10 is provided with a plurality of opposing sliding grooves (not shown in the figure), and the sliding adjustment block further includes a plurality of guide parts (not shown in the figure) and at least one magnetic element (not shown in the figure), each of the guide parts being slidably disposed in the sliding groove; the adjustment drive module includes an electromagnetic ring (not shown in the figure), the electromagnetic ring being disposed at the bottom of the outer side of the cylinder 10 and including an energized coil (not shown in the figure), the energized coil generating a magnetic field penetrating the cylinder 10, the direction or intensity of the magnetic field being adjusted by rotating the electromagnetic ring, the magnetic field interacting with the magnetic element to attract or repel the sliding adjustment block 41 to move along the sliding groove.

[0022] 2. The sliding adjustment block 41 is an airtight piston, the adjustment drive module 42 is a screw, and the other end of the adjustment drive module 42 is provided with a rotating handle 421. The adjustment drive module 42 is screwed to the bottom of the cylinder body 10. The sliding adjustment block 41 is located inside the gas chamber 112, and the rotating handle 421 is located outside the cylinder body 10. By rotating the rotating handle 421, the sliding adjustment block 41 moves toward or away from the oil-gas separator piston 20, thereby changing the effective volume of nitrogen and the pressure of nitrogen in the gas chamber 112. In this embodiment, an airtight element (not shown in the figure) is provided on the outside of the adjustment drive module 42. The airtight element is a sealing ring, a bellows seal, or a packing seal.

[0023] Furthermore, in the two embodiments described above, the adjustment drive module 42 further includes a locking module (not shown in the figure) to fix the sliding adjustment block 41 at a predetermined position, thereby preventing the sliding adjustment block 41 from moving.

[0024] After the air chamber adjustment module 40 is adjusted, the nitrogen pressure in the air chamber 112 is in the range of 2 to 10 bar. When the distance between the sliding adjustment block 41 and the oil-gas separator piston 20 is smaller, the nitrogen pressure is greater. When the vehicle is driving, it will feel more firm and have a clearer road feel when facing road potholes. Conversely, when the distance between the sliding adjustment block 41 and the oil-gas separator piston 20 is greater, the nitrogen pressure is smaller. When the vehicle is driving, it will feel more soft and smooth when facing road potholes.

[0025] In addition, in order to improve efficiency, the sliding adjustment block 41 has a predetermined height, which is less than or equal to the height of the oil-gas separator piston 20, thereby enabling a wider adjustment range of the gas chamber 112; the bottom surface of the sliding adjustment block 41 has a recess, and one end of the adjustment drive module 42 is located at the center of the recess, thereby reducing the weight of the sliding adjustment block 41.

[0026] The above detailed description is a specific description of one feasible embodiment of the present invention. However, the embodiment is not intended to limit the patent scope of the present invention. All equivalent implementations or modifications that do not depart from the spirit of the present invention should be included in the patent scope of this case. [Simplified Explanation of the Diagram]

[0027] The first figure is a cross-sectional view of the cylinder block of the present invention. The second figure is a diagram of the piston rod sinking action continuing from the first figure. The third figure is a cross-sectional view of the regulating chamber of the present invention. The fourth figure is a diagram of the piston rod sinking action continuing from the third figure.

Claims

1. A gas-adjustable shock absorber, comprising: a cylinder having an internal accommodating space; an oil-gas separator piston slidably disposed within the accommodating space, dividing the accommodating space into an oil chamber and an air chamber, the oil chamber being filled with a predetermined volume of damping oil, and the air chamber being filled with a predetermined volume of nitrogen gas; a piston rod including a first rod body and a piston disposed on the first rod body, the first rod body being slidably disposed on the top of the cylinder, causing the piston to slide within the oil chamber, dividing the oil chamber into a first oil chamber and a second oil chamber, the piston having at least one through hole, the damping oil flowing between the first oil chamber and the second oil chamber through the through hole; and an air chamber adjustment module including a sliding adjustment block and an adjustment drive module connected to the sliding adjustment block, the sliding adjustment block being slidably disposed within the cylinder; The cylinder has a predetermined distance between the chamber and the oil-gas separator piston. The adjustment drive module is located outside the cylinder. By adjusting the adjustment drive module, the sliding adjustment block moves toward or away from the oil-gas separator piston, thereby changing the effective volume and pressure of the nitrogen in the chamber. The inner wall of the cylinder is provided with a plurality of opposing grooves. The sliding adjustment block further includes a plurality of guide parts and at least one magnetic element. Each guide part slides in the groove. The adjustment drive module includes an electromagnetic ring, which is located at the bottom of the outer side of the cylinder and includes an energized coil. The energized coil generates a magnetic field that penetrates the cylinder. By rotating the electromagnetic ring, the direction or intensity of the magnetic field is adjusted. The magnetic field interacts with the magnetic element to attract or repel the sliding adjustment block to move along the groove.

2. A gas-adjustable shock absorber, comprising: a cylinder having an internal accommodating space; an oil-gas separator piston slidably disposed within the accommodating space, dividing the accommodating space into an oil chamber and an air chamber, the oil chamber being filled with a predetermined volume of damping oil, and the air chamber being filled with a predetermined volume of nitrogen gas; a piston rod including a first rod body and a piston disposed on the first rod body, the first rod body being slidably disposed on the top of the cylinder, causing the piston to slide within the oil chamber, dividing the oil chamber into a first oil chamber and a second oil chamber, the piston having at least one through hole through which the damping oil flows between the first oil chamber and the second oil chamber; and an air chamber adjustment module comprising a sliding adjustment block and an adjustment drive module connected to the sliding adjustment block, the sliding adjustment block... The sliding adjustment block is slidably disposed within the gas chamber and at a predetermined distance from the oil-gas separator piston. The adjustment drive module is located outside the cylinder body. By adjusting the adjustment drive module, the sliding adjustment block moves toward or away from the oil-gas separator piston, thereby changing the effective volume and pressure of the nitrogen in the gas chamber. The sliding adjustment block is an airtight piston, and the adjustment drive module is a screw. The other end of the adjustment drive module is provided with a rotating handle. The adjustment drive module is screwed to the bottom of the cylinder body. The sliding adjustment block is located within the gas chamber, and the rotating handle is located outside the cylinder body. By rotating the rotating handle, the sliding adjustment block moves toward or away from the oil-gas separator piston, thereby changing the effective volume and pressure of the nitrogen in the gas chamber.

3. The gas-adjustable shock absorber as described in claim 1 or 2, wherein an airtight element is provided on the outside of the adjustment drive module, the airtight element being a sealing ring, a bellows seal, or a packing seal.

4. The gas-adjustable shock absorber as described in claim 1 or 2, wherein the adjustment drive module further includes a locking module for fixing the sliding adjustment block at a predetermined position, thereby preventing the sliding adjustment block from moving.

5. The gas-adjustable shock absorber as described in claim 1 or 2, wherein the sliding adjustment block is provided with a sealing ring so that the outer diameter of the sliding adjustment block is tightly fitted with the inner wall of the cylinder, thereby ensuring the airtightness of the air chamber.

6. The gas-adjustable shock absorber as described in claim 1 or 2, wherein the sliding adjustment block has a predetermined height, and the height is less than or equal to the height of the oil-gas separator piston.

7. The gas-adjustable shock absorber as described in claim 1 or 2, wherein the bottom surface of the sliding adjustment block has a recess, and one end of the adjustment drive module is located at the center of the recess, thereby reducing the weight of the sliding adjustment block through the recess.

8. The gas-adjustable shock absorber as described in claim 1 or 2, wherein the through-hole is provided with a throttling device and a knob connected to the throttling device, rotating the knob to drive the throttling device to expand or shrink the through-hole, thereby controlling the flow rate of the damping oil between the first oil chamber and the second oil chamber.

9. The gas-adjustable shock absorber as described in claim 1 or 2, wherein the nitrogen pressure in the gas chamber is in the range of 2 to 10 bar.

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