Air pressure damping adjusting device of shock absorber

Abstract

The utility model belongs to the technical field of shock absorbers, in particular to an air pressure damping adjusting device of a shock absorber, which comprises a damping adjusting cylinder and a damping piston axially plugged in the damping adjusting cylinder, the damping piston divides an inner cavity of the damping adjusting cylinder into an oil pressure cavity and an air pressure cavity, and the oil pressure cavity is communicated and matched with shock absorber oil. An air pressure piston is axially plugged in the damping adjusting cylinder on the side, away from the oil pressure cavity, of the damping piston, the air pressure cavity is formed between the air pressure piston and the damping piston, the corresponding end of the damping adjusting cylinder is connected with an air pressure driving assembly, and the air pressure driving assembly drives the air pressure piston to move axially so as to adjust the air pressure compression amount in the air pressure cavity. The pneumatic damper is simple in structure, ingenious in design and stable and reliable in adjustment, the pneumatic piston is driven by the pneumatic driving assembly to axially move relative to the damping piston so as to directly change the pneumatic compression amount of the pneumatic cavity, the damping effect of the damper is effectively adjusted, and the pneumatic damper is easy and fast to operate and high in efficiency.

Description

Technical fields:

[0001] This utility model belongs to the field of shock absorber technology, and specifically refers to a shock absorber air pressure damping adjustment device. Background technology:

[0002] Currently, dual-chamber shock absorbers generally include a sleeve assembly, a dual-seat regulating valve, and a damping gas tank. The sleeve assembly includes a hydraulic cylinder filled with damping oil, a piston rod, and a spring assembly. The hydraulic cylinder is connected to the hydraulic chamber of the dual-seat regulating valve and the gas tank via a flow channel. The gas tank's pressure chamber is filled with inert gas. The pressure balance between the pressure chamber and the hydraulic chamber achieves the purpose of absorbing vibration. That is, when the motorcycle is riding on uneven road conditions, the sleeve assembly is compressed and rebounded by the spring, and the flow of damping oil in the hydraulic cylinder, dual-seat regulating valve, and gas tank absorbs the impact energy, thereby achieving a good shock absorption effect.

[0003] A manually adjustable damping shock absorber disclosed in a Chinese utility model patent (authorization announcement number CN208703005U) includes a base, a hydraulic cylinder on the base, an inner cylinder coaxially arranged inside the hydraulic cylinder, a through hole in the inner cylinder, an upper sealing cover inside the hydraulic cylinder, an outer cylinder sleeved on the hydraulic cylinder, a lower sealing cover inside the outer cylinder, a piston rod inside the inner cylinder, a piston at the other end of the piston rod located inside the inner cylinder, a spring on the piston rod located between the upper and lower sealing covers, and an airbag device on the base. The airbag device is connected to the inner cylinder and the cavity respectively and has a first flow channel and a second flow channel. The first flow channel and the second flow channel are respectively provided with a first adjustment device and a second adjustment device to adjust their liquid flow cross-section. The airbag device includes an airbag cylinder with openings at both ends. One end of the airbag cylinder is located on the airbag mounting groove, and the other end of the airbag cylinder is provided with an airbag sealing cap. The sealing cap has a through hole in the middle and a plug is provided on the through hole. An airbag piston is provided inside the airbag cylinder, which divides the airbag cylinder into an air chamber and an oil chamber. The oil chamber is connected to the airbag mounting groove.

[0004] In the aforementioned structure, the damping oil entering the oil chamber pushes the air chamber piston to compress the air chamber, increasing its volume and storing oil. Correspondingly, as the volume of the oil chamber increases, the oil pressure decreases, while the volume of the air chamber decreases, and the air pressure increases. Ultimately, a pressure balance is achieved between the air pressure and hydraulic pressure, effectively absorbing vibrations and improving the damping effect. Therefore, the air pressure in the air chamber directly affects the damping effect of the shock absorber. However, to adjust the air pressure in the air chamber, the plug at the sealing cap needs to be removed and replaced, and an external air source is required to inflate or deflate the air chamber. Each inflation / deflation adjustment operation is quite cumbersome. Moreover, after each inflation / deflation, a damping effect test is required. If the damping effect of the shock absorber does not meet expectations, the inflation / deflation operation of the air chamber needs to be repeated. Thus, it is evident that the entire operation of adjusting the air pressure in the air chamber in the existing structure is extremely cumbersome, complex, time-consuming, and inefficient. Summary of the Invention:

[0005] The purpose of this invention is to provide a pneumatic damping adjustment device for a shock absorber. It has a simple structure, ingenious design, and stable and reliable adjustment. The axial movement of the pneumatic piston directly changes the air pressure compression in the pneumatic chamber, thereby effectively adjusting the damping and shock absorption effect of the shock absorber. Compared with the prior art, there is no need to charge or deflate the pneumatic chamber, making the operation simple, quick, and efficient.

[0006] This utility model is implemented as follows:

[0007] A shock absorber pneumatic damping adjustment device includes a damping adjustment cylinder and a damping piston with an axial plunger inside the damping adjustment cylinder. The damping piston divides the inner cavity of the damping adjustment cylinder into a hydraulic chamber and a pneumatic chamber. The hydraulic chamber is connected to the shock absorber's hydraulic fluid. A pneumatic piston is located on the side of the damping piston away from the hydraulic chamber. The pneumatic piston and the damping piston form the pneumatic chamber. A pneumatic drive assembly is connected to the corresponding end of the damping adjustment cylinder. The pneumatic drive assembly drives the pneumatic piston to move axially to adjust the amount of air compression in the pneumatic chamber.

[0008] In the above-mentioned air pressure damping adjustment device for a shock absorber, the air pressure drive assembly includes an air pressure adjustment end cover fitted on the corresponding port of the damping adjustment cylinder. The air pressure adjustment end cover is movably connected to an adjustment main shaft along its axis. The inner end of the adjustment main shaft abuts against the corresponding end face of the air pressure piston, and the outer end is connected to the power source for transmission.

[0009] In the above-mentioned air pressure damping adjustment device for a shock absorber, the main adjustment shaft includes an adjustment shaft rotatably fitted on the air pressure adjustment end cover. The outer end of the adjustment shaft is connected to a power source for transmission. The inner end of the adjustment shaft and the outer end of the adjustment push rod rotate synchronously in the circumference and slide relative to each other in the axial direction. The adjustment push rod is threadedly fitted to the air pressure adjustment end cover. The inner end of the adjustment push rod abuts against the corresponding end face of the air pressure piston. The rotation of the adjustment shaft drives the adjustment push rod to rotate and move axially.

[0010] In the above-mentioned air pressure damping adjustment device for a shock absorber, the power source is an air pressure adjusting cap fitted on the outer end of the adjusting shaft. The tail end of the fastening screw passes through the air pressure adjusting cap and is screwed onto the outer end of the adjusting shaft to achieve a fixed fit between the air pressure adjusting cap and the adjusting shaft.

[0011] In the above-mentioned air pressure damping adjustment device for a shock absorber, the adjustment shaft is rotatably fitted onto the central through hole of the air pressure adjustment end cover via a bushing or bearing. A radial through hole is provided on the diameter of the adjustment shaft. Positioning steel balls are placed at both ends of the radial through hole. A compression spring is provided inside the radial through hole, with its two ends respectively abutting against the corresponding positioning steel balls. An even number of positioning grooves that allow the positioning steel balls to partially enter are evenly distributed circumferentially on the side wall of the central through hole of the air pressure adjustment end cover.

[0012] In the above-mentioned air pressure damping adjustment device for a shock absorber, the outer end of the adjustment push rod is provided with a straight linkage groove, and the inner end of the adjustment shaft is a straight structure that can be axially inserted into the straight linkage groove.

[0013] In the above-mentioned air pressure damping adjustment device for a shock absorber, the air pressure adjustment end cap is threadedly connected to the corresponding port of the damping adjustment cylinder, and an assembly sealing ring is provided between the air pressure adjustment end cap and the damping adjustment cylinder.

[0014] In the above-mentioned air pressure damping adjustment device for a shock absorber, an air supply hole communicating with the air pressure chamber is provided on the axis of the air pressure piston. A one-way valve block is provided at the inner port of the air supply hole. The one-way valve block can block the air supply hole under the action of air pressure in the air pressure chamber. A sealing screw is connected to the outer port of the air supply hole by a thread, and an air supply sealing ring is provided between the sealing screw and the air supply hole.

[0015] In the above-mentioned air pressure damping adjustment device for a shock absorber, a limiting ring groove is formed on the inner wall of the damping adjustment cylinder located outside the air pressure piston, and a limiting snap ring for axially limiting the air pressure piston is sleeved on the limiting ring groove.

[0016] The outstanding advantages of this utility model compared to the prior art are:

[0017] This utility model has a simple structure, ingenious design, and stable and reliable adjustment. It uses a pneumatic drive component to drive the pneumatic piston to move axially relative to the damping piston, thereby directly changing the air pressure compression in the pneumatic chamber and effectively adjusting the damping effect of the shock absorber. Compared with the prior art, it eliminates the need for charging and decharging the pneumatic chamber, making it simple, quick, and efficient to operate. Attached image description:

[0018] Figure 1 This is a three-dimensional view of the shock absorber of this utility model;

[0019] Figure 2 This is a cross-sectional view of the air pressure damping adjustment device of this utility model mounted on a shock absorber;

[0020] Figure 3 This is an exploded view of the pneumatic damping adjustment device of this utility model.

[0021] In the diagram: 1. Damping adjusting cylinder; 2. Damping piston; 3. Hydraulic chamber; 4. Pneumatic chamber; 5. Shock absorber; 6. Pneumatic piston; 7. Pneumatic adjusting end cap; 8. Adjusting spindle; 9. Adjusting shaft; 10. Adjusting push rod; 11. Pneumatic adjusting cap; 12. Fastening screw; 13. Positioning steel ball; 14. Compression spring; 15. Positioning groove; 16. One-way linkage groove; 17. Assembly sealing ring; 18. Air replenishment hole; 19. One-way valve block; 20. Sealing screw; 21. Air replenishment sealing ring; 22. Limiting snap ring. Detailed implementation method:

[0022] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —3:

[0023] A shock absorber pneumatic damping adjustment device includes a damping adjustment cylinder 1 and a damping piston 2 with an axial plunger inside the damping adjustment cylinder 1. The damping piston 2 divides the inner cavity of the damping adjustment cylinder 1 into a hydraulic chamber 3 and a pneumatic chamber 4. The hydraulic chamber 3 is in hydraulic communication with the shock absorber 5. A pneumatic piston 6 is axially plunged inside the damping adjustment cylinder 1 on the side of the damping piston 2 away from the hydraulic chamber 3. The pneumatic piston 6 and the damping piston 2 form the pneumatic chamber 4. A pneumatic drive assembly is connected to the corresponding end of the damping adjustment cylinder 1. The pneumatic drive assembly drives the pneumatic piston 6 to move axially to adjust the amount of air compression in the pneumatic chamber 4.

[0024] This utility model has a simple structure, ingenious design, and stable and reliable adjustment. By using a pneumatic drive component to drive the pneumatic piston 6 to move axially relative to the damping piston 2, the amount of air compression in the pneumatic chamber 4 can be directly changed, thereby effectively adjusting the damping and shock absorption effect of the shock absorber. Compared with the prior art, there is no need to charge or deflate the pneumatic chamber 4, making the operation simple, quick, and efficient.

[0025] The pneumatic drive assembly can use external hydraulic or pneumatic pressure to drive the axial movement of the pneumatic piston 6. In this embodiment, the pneumatic drive assembly is driven mechanically: the pneumatic drive assembly includes a pneumatic adjustment end cover 7 fitted at the corresponding port of the damping adjustment cylinder 1. The pneumatic adjustment end cover 7 is movably connected to an adjustment main shaft 8 along its axis. The inner end of the adjustment main shaft 8 abuts against the corresponding end face of the pneumatic piston 6, and the outer end is connected to the power source for transmission.

[0026] Furthermore, the adjusting spindle 8 can be an integral structure and drive the pneumatic piston 6 to move axially. In this embodiment, the adjusting spindle 8 includes an adjusting shaft 9 rotatably fitted on the pneumatic adjusting end cover 7. The outer end of the adjusting shaft 9 is connected to the power source for transmission. The inner end of the adjusting shaft 9 and the outer end of the adjusting push rod 10 rotate synchronously in the circumference and slide relative to each other in the axial direction. The adjusting push rod 10 is threadedly fitted to the pneumatic adjusting end cover 7. The inner end of the adjusting push rod 10 abuts against the corresponding end face of the pneumatic piston 6. That is, the adjusting shaft 9 rotates to drive the adjusting push rod 10 to rotate and move axially.

[0027] The power source can be directly driven by a servo motor. In this embodiment, in order to reasonably control the cost and based on the fact that the damping effect of the shock absorber 5 changes less frequently in actual applications, manual operation is adopted. That is, the power source is a pneumatic adjustment cap 11 mounted on the outer end of the adjustment shaft 9. The tail end of the fastening screw 12 passes through the pneumatic adjustment cap 11 and is screwed onto the outer end of the adjustment shaft 9 to achieve a fixed fit between the pneumatic adjustment cap 11 and the adjustment shaft 9. That is, the operator rotates the pneumatic adjustment cap 11 to drive the adjustment shaft 9 to rotate synchronously.

[0028] Meanwhile, to facilitate the operator's rotational adjustment, the adjusting shaft 9 is rotatably fitted onto the central through hole of the air pressure regulating end cover 7 via a bushing or bearing. A radial through hole is formed on the diameter of the adjusting shaft 9, with positioning steel balls 13 placed at both ends of the radial through hole. A compression spring 14, with its two ends respectively abutting against the corresponding positioning steel ball 13, is installed inside the radial through hole. An even number of positioning grooves 15 are evenly distributed circumferentially on the side wall of the central through hole of the air pressure regulating end cover 7, allowing partial entry of the positioning steel balls 13. The design and fit between the positioning grooves 15 and the positioning steel balls 13 allows the adjusting shaft 9 to form multiple adjustment positions during rotation. That is, during the rotation of the adjusting shaft 9, the positioning steel ball 13 can separate from the previous positioning groove 15 and enter the next positioning groove 15, while simultaneously providing feedback force to the operator to indicate that the next adjustment position has been entered.

[0029] Furthermore, in order to enable the adjusting push rod 10 to rotate synchronously with the adjusting shaft 9 and move axially relative to it, the outer end of the adjusting push rod 10 is provided with a straight linkage groove 16, and the inner end of the adjusting shaft 9 is a straight structure that can be axially inserted into the straight linkage groove 16.

[0030] Furthermore, in order to prevent external gas or liquid from entering the damping adjustment cylinder 1 and affecting the normal damping and shock absorption of the damping adjustment cylinder 1, the air pressure adjustment end cap 7 is threadedly connected to the corresponding port of the damping adjustment cylinder 1, and an assembly sealing ring 17 is provided between the air pressure adjustment end cap 7 and the damping adjustment cylinder 1.

[0031] In addition, in order to replenish the inert gas in the pneumatic chamber 4, a replenishment through hole 18 communicating with the pneumatic chamber 4 is provided on the axis of the pneumatic piston 6. A one-way valve block 19 is provided at the inner port of the replenishment through hole 18. The one-way valve block 19 can block the replenishment through hole 18 under the action of the pneumatic pressure in the pneumatic chamber 4. Correspondingly, during the replenishment operation, the high-pressure gas from the external gas source can push the one-way valve block 19 to open the replenishment through hole 18. The outer port of the replenishment through hole 18 is connected to a sealing screw 20 by a thread, and a replenishment sealing ring 21 is provided between the sealing screw 20 and the replenishment through hole 18. In this embodiment, in order to avoid the adjusting push rod 10 from causing wear to the pneumatic piston 6, the inner end of the adjusting push rod 10 abuts against the top surface of the nut of the sealing screw 20 axially.

[0032] Furthermore, a limiting ring groove is formed on the inner wall of the damping adjustment cylinder 1 located outside the pneumatic piston 6, and a limiting snap ring 22 for axially limiting the pneumatic piston 6 is sleeved on the limiting ring groove.

[0033] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A pneumatic damping adjustment device for a shock absorber, comprising a damping adjustment cylinder (1) and a damping piston (2) with an axial plunger inside the damping adjustment cylinder (1), the damping piston (2) dividing the inner cavity of the damping adjustment cylinder (1) into a hydraulic chamber (3) and a pneumatic chamber (4), the hydraulic chamber (3) being in hydraulic communication with the shock absorber (5), characterized in that: A pneumatic piston (6) is axially plunged inside the damping adjusting cylinder (1) located on the side of the damping piston (2) away from the hydraulic chamber (3). The pneumatic piston (6) and the damping piston (2) form the pneumatic chamber (4). A pneumatic drive assembly is connected to the corresponding end of the damping adjusting cylinder (1). The pneumatic drive assembly drives the pneumatic piston (6) to move axially to adjust the amount of air compression in the pneumatic chamber (4).

2. The air pressure damping adjustment device for a shock absorber according to claim 1, characterized in that: The pneumatic drive assembly includes a pneumatic adjustment end cap (7) fitted at the corresponding port of the damping adjustment cylinder (1). The pneumatic adjustment end cap (7) is movably connected to an adjustment main shaft (8) along its axis. The inner end of the adjustment main shaft (8) abuts against the corresponding end face of the pneumatic piston (6), and the outer end is connected to the power source for transmission.

3. The air pressure damping adjustment device for a shock absorber according to claim 2, characterized in that: The main adjusting shaft (8) includes an adjusting shaft (9) rotatably fitted on the air pressure adjusting end cover (7). The outer end of the adjusting shaft (9) is connected to the power source for transmission. The inner end of the adjusting shaft (9) and the outer end of the adjusting push rod (10) rotate synchronously in the circumference and slide relative to each other in the axial direction. The adjusting push rod (10) is threadedly fitted to the air pressure adjusting end cover (7). The inner end of the adjusting push rod (10) abuts against the corresponding end face of the air pressure piston (6). The adjusting shaft (9) rotates to drive the adjusting push rod (10) to rotate and move axially.

4. The air pressure damping adjustment device for a shock absorber according to claim 3, characterized in that: The power source is a pneumatic adjustment cap (11) fitted on the outer end of the adjustment shaft (9). The tail end of the fastening screw (12) passes through the pneumatic adjustment cap (11) and is screwed onto the outer end of the adjustment shaft (9) to achieve a fixed fit between the pneumatic adjustment cap (11) and the adjustment shaft (9).

5. The air pressure damping adjustment device for a shock absorber according to claim 3, characterized in that: The adjusting shaft (9) is rotatably fitted on the central through hole of the air pressure regulating end cover (7) via a bushing or bearing. A radial through hole is provided on the diameter of the adjusting shaft (9). A positioning steel ball (13) is placed at both ends of the radial through hole. A compression spring (14) is provided in the radial through hole, with its two ends abutting against the corresponding positioning steel ball (13). An even number of positioning grooves (15) that allow the positioning steel ball (13) to partially enter are evenly distributed on the side wall of the central through hole of the air pressure regulating end cover (7).

6. The air pressure damping adjustment device for a shock absorber according to claim 3, characterized in that: The outer end of the adjusting push rod (10) is provided with a straight linkage groove (16), and the inner end of the adjusting shaft (9) is a straight structure that can be axially inserted into the straight linkage groove (16).

7. The air pressure damping adjustment device for a shock absorber according to claim 2, characterized in that: The pressure regulating end cap (7) is threadedly connected to the corresponding port of the damping regulating cylinder (1), and an assembly sealing ring (17) is provided between the pressure regulating end cap (7) and the damping regulating cylinder (1).

8. The air pressure damping adjustment device for a shock absorber according to claim 1, characterized in that: The pneumatic piston (6) has an air supply hole (18) on its axis that communicates with the pneumatic chamber (4). A one-way valve block (19) is provided at the inner port of the air supply hole (18). The one-way valve block (19) can block the air supply hole (18) under the action of the air pressure in the pneumatic chamber (4). A sealing screw (20) is connected to the outer port of the air supply hole (18) by a thread. An air supply sealing ring (21) is provided between the sealing screw (20) and the air supply hole (18).

9. The air pressure damping adjustment device for a shock absorber according to claim 1, characterized in that: A limiting ring groove is provided on the inner wall of the damping adjustment cylinder (1) located outside the pneumatic piston (6), and a limiting snap ring (22) for axially limiting the pneumatic piston (6) is sleeved on the limiting ring groove.

Images