Sealed gas filling device for gas cylinder of shock absorber

Abstract

The utility model relates to the field of shock absorbers, in particular to a shock absorber gas cylinder sealing gas filling device which comprises a cylinder body positioning frame provided with a cylinder body positioning hole. The sealing cover is detachably connected with the cylinder body positioning frame, and a sealing cavity is defined by the sealing cover and the cylinder body positioning frame; one end of the piston valve clamp is connected with the stroke driving piece, and the other end of the piston valve clamp extends into the sealing cavity and is opposite to the cylinder body positioning hole; the vacuum adjusting pipe extends into the sealing cavity; and the nitrogen connecting pipe extends into the sealed cavity. According to the shock absorber gas cylinder sealing gas filling device, when gas filling is conducted on the gas cavity, gas in the gas cavity can be exhausted, the purity of added nitrogen is guaranteed, the reliability of the shock absorber gas cavity used for the shock absorption effect is guaranteed, the gas pressure in the gas cavity can be more visually controlled and guaranteed, and the phenomenon that when a piston valve is installed and positioned, the piston valve is not damaged is effectively avoided. And the escape phenomenon of the pressure gas in the cavity ensures that the gas pressure in the gas cavity accords with a design value.

Description

Technical Field

[0001] The utility model relates to the field of shock absorbers, in particular to a gas filling device for sealing the gas cylinder of a shock absorber. Background Art

[0002] The structure of the shock absorber gas cylinder refers to the Chinese utility model patent with the application number CN202022124405.X and the name of a shock absorber gas cylinder structure. For a shock absorber with an upper liquid and lower gas structure design for the oil-gas separation chamber, the requirement for the sealing of the package is relatively high. The shock absorber adopts a rubber gas filling valve design. After using this valve for a period of time, there will be air leakage or pressure loss. After the shock absorber works for a period of time, it needs to be refilled with gas. However, since the original gas chamber is not evacuated, there will be a certain amount of air in the gas chamber, which affects the compression and recovery effects of the shock absorber. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a gas filling device for sealing the gas cylinder of a shock absorber to ensure that the gas pressure in the gas chamber meets the design value after gas filling.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a gas filling device for sealing the gas cylinder of a shock absorber, including:

[0005] A cylinder positioning frame provided with a cylinder positioning hole;

[0006] A sealing cover detachably connected to the cylinder positioning frame, and a sealing chamber is formed by enclosing the sealing cover and the cylinder positioning frame;

[0007] A piston valve fixture, one end of which is connected to a stroke driving member, and the other end extends into the sealing chamber and is arranged opposite to the cylinder positioning hole;

[0008] A vacuum regulating pipe extending into the sealing chamber;

[0009] A nitrogen connecting pipe extending into the sealing chamber.

[0010] Further, it further includes a workbench, and both the cylinder positioning frame and the stroke driving member are arranged on the workbench.

[0011] Further, the stroke driving member and the cylinder positioning frame are arranged vertically on the workbench, and the workbench is provided with guide rail columns in the vertical direction, and the cylinder positioning frame is slidably connected to the guide rail columns.

[0012] Further, the cylinder positioning frame is provided with a quick clamp assembly, and the quick clamp assembly is detachably connected to the sealing cover.

[0013] Further, the piston valve fixture includes a vacuum cylinder and a vacuum suction cup. The sealing cover has an installation hole, the vacuum cylinder is slidably matched with the installation hole, one end of the vacuum cylinder is connected to the stroke driving member, and the other end extends into the sealing chamber and is connected to the vacuum suction cup.

[0014] Further, sealing rings are provided in both the cylinder block positioning holes and the mounting holes.

[0015] Further, the piston valve fixture further includes a vacuum tube, which is connected to the vacuum cylinder. A suction cup vacuum negative pressure gauge and a suction cup stop valve are provided on the vacuum tube, and a suction cup air release valve is provided on the vacuum cylinder.

[0016] Further, a mounting portion for mounting an elastic wire retaining ring is provided on the vacuum cylinder.

[0017] Further, an air chamber vacuum stop valve and an air chamber vacuum degree negative pressure gauge are provided on the vacuum regulating tube, and a nitrogen stop valve and a nitrogen positive pressure gauge are provided on the nitrogen connecting tube.

[0018] Further, an air chamber air release valve is provided on the side wall of the sealing cover.

[0019] The beneficial effects of the present utility model are as follows: For the shock absorber gas cylinder sealing and gas filling device, when in use, the cylinder block to be filled is installed at the cylinder block positioning hole, the piston valve main body is adsorbed by using the piston valve fixture, the sealing cover is covered so that the sealing cover and the cylinder block positioning frame enclose to form a sealed chamber, then the vacuum degree of the sealed chamber is adjusted through the vacuum regulating tube, gas is filled through the nitrogen connecting tube. When the pressure reaches the specified value, the piston valve fixture is controlled to move by the stroke driving member until the piston valve main body is pressed into the specified height in the cylinder block to be filled, then the sealed chamber is controlled to restore to the room pressure, and the elastic wire retaining ring is installed for limiting, so that the piston valve main body will not come out of the cylinder block to be filled, and a shock absorber gas filling process is completed. Compared with the traditional gas filling method, although the operation steps of this device are slightly cumbersome, and there is no design for a recovery mechanism for the redundant nitrogen, resulting in a certain amount of loss, when filling gas into the air chamber, the gas in the air chamber can be discharged, ensuring the purity of the added nitrogen, ensuring the reliability of the shock absorber air chamber for the shock absorption effect, and being able to more intuitively control and ensure the gas pressure in the air chamber, effectively preventing the escape of the pressurized gas in the cavity when the piston valve is installed and positioned, and ensuring that the gas pressure in the air chamber conforms to the design value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the shock absorber gas cylinder sealing and gas filling device;

[0021] Label Description:

[0022] 1. Cylinder block positioning frame; 11. Cylinder block positioning hole; 111. Sealing ring; 12. Quick clamp assembly;

[0023] 2. Sealing cover; 21. Sealed chamber; 22. Mounting hole; 23. Air chamber air release valve;

[0024] 3. Piston valve fixture; 31. Vacuum cylinder; 311. Suction cup air release valve; 32. Vacuum suction cup; 33. Vacuum tube; 331. Suction cup vacuum negative pressure gauge; 332. Suction cup stop valve;

[0025] 4. Stroke drive member;

[0026] 5. Vacuum regulation tube; 51. Air chamber vacuum stop valve; 52. Air chamber vacuum degree negative pressure gauge;

[0027] 6. Nitrogen connection tube; 61. Nitrogen stop valve; 62. Nitrogen positive pressure gauge;

[0028] 7. Workbench; 71. Guide rail column;

[0029] 8. Elastic wire retaining ring. Detailed implementation mode

[0030] To describe in detail the technical content, achieved purpose and effects of the present utility model, the following is described in conjunction with the implementation modes and accompanied by the drawings.

[0031] The present utility model provides a shock absorber gas cylinder sealing and gas filling device, which is applicable to the gas chamber encapsulation working condition of an upper liquid and lower gas type shock absorber.

[0032] Please refer to Figure 1 As shown, the shock absorber gas cylinder sealing and gas filling device of the present utility model includes:

[0033] Cylinder body positioning frame, provided with a cylinder body positioning hole;

[0034] Sealing cover, detachably connected to the cylinder body positioning frame, and the sealing cover and the cylinder body positioning frame enclose a sealed chamber;

[0035] Piston valve fixture, one end connected to the stroke drive member, and the other end extending into the sealed chamber and disposed opposite to the cylinder body positioning hole;

[0036] Vacuum regulation tube, extending into the sealed chamber;

[0037] Nitrogen connection tube, extending into the sealed chamber.

[0038] As can be seen from the above description, the beneficial effects of the present utility model are as follows: for the shock absorber gas cylinder sealing and gas filling device, when in use, the cylinder to be filled is installed at the cylinder positioning hole, the piston valve fixture adsorbs the piston valve body, the sealing cover is covered so that the sealing cover and the cylinder positioning frame enclose to form a sealed chamber, then the vacuum degree of the sealed chamber is adjusted through the vacuum regulating pipe, gas is filled through the nitrogen connecting pipe, when the pressure reaches the specified value, the piston valve fixture is controlled to move by the stroke driving member, until the piston valve body is pressed into the specified height in the cylinder to be filled, then the sealed chamber is controlled to restore the chamber pressure, and an elastic wire retaining ring is installed for limiting, so that the piston valve body will not come out of the cylinder to be filled, and a shock absorber gas filling process is completed. Compared with the traditional gas filling method, although the operation steps of this device are slightly cumbersome and there is no design for the recovery mechanism of the redundant nitrogen, there is a certain amount of loss, but when filling gas into the air chamber, the gas in the air chamber can be discharged, ensuring the purity of the nitrogen added, ensuring the reliability of the shock absorber air chamber for the shock absorption effect, and moreover, it can more intuitively control and ensure the gas pressure in the air chamber, effectively preventing the escape of the pressurized gas in the chamber when the piston valve is installed and positioned, ensuring that the gas pressure in the air chamber meets the design value.

[0039] In an alternative embodiment, it further includes a workbench, and both the cylinder positioning frame and the stroke driving member are arranged on the workbench.

[0040] As can be seen from the above description, the workbench plays a role in improving the stability of the gas filling operation.

[0041] In an alternative embodiment, the stroke driving member and the cylinder positioning frame are arranged vertically on the workbench, and the workbench is provided with guide rail columns in the vertical direction, and the cylinder positioning frame is slidably connected to the guide rail columns.

[0042] As can be seen from the above description, the cylinder positioning frame adopts a lifting and adjustable structure, which is convenient for the stroke adjustment of the cylinder to be filled.

[0043] In an alternative embodiment, the cylinder positioning frame is provided with a quick clamp assembly, and the quick clamp assembly is detachably connected to the sealing cover.

[0044] As can be seen from the above description, the quick clamp assembly is used for the quick and stable positioning of the sealing cover.

[0045] In an alternative embodiment, the piston valve fixture includes a vacuum cylinder and a vacuum suction cup, the sealing cover has a mounting hole, the vacuum cylinder is slidably matched with the mounting hole, one end of the vacuum cylinder is connected to the stroke driving member, and the other end extends into the sealed chamber and is connected to the vacuum suction cup.

[0046] As can be seen from the above description, the vacuum cylinder moves along an axis driven by the stroke driving member, driving the vacuum suction cup adsorbed with the piston valve body to approach or move away from the cylinder to be filled.

[0047] In an alternative embodiment, sealing rings are provided in both the cylinder positioning hole and the mounting hole.

[0048] As can be seen from the above description, the sealing ring is used to improve the sealing performance of the assembly structure.

[0049] In an alternative embodiment, the piston valve fixture further includes a vacuum tube connected to the vacuum cylinder. A suction cup vacuum negative pressure gauge and a suction cup stop valve are provided on the vacuum tube, and a suction cup air release valve is provided on the vacuum cylinder.

[0050] In an alternative embodiment, the vacuum cylinder is provided with a mounting portion for mounting an elastic wire snap ring.

[0051] As can be seen from the above description, when the original piston valve body is positioned, since the original air chamber gas will escape when passing through the snap ring groove, the air chamber gas pressure is uncontrollable and cannot meet the preset air pressure requirements. The design structure of this device facilitates the use of an elastic wire snap ring for positioning, so that the piston valve body will not come out of the cylinder to be filled, ensuring the gas filling accuracy.

[0052] In an alternative embodiment, an air chamber vacuum stop valve and an air chamber vacuum degree negative pressure gauge are provided on the vacuum adjustment tube, and a nitrogen stop valve and a nitrogen positive pressure gauge are provided on the nitrogen connection tube.

[0053] In an alternative embodiment, an air chamber air release valve is provided on the side wall of the sealing cover.

[0054] The working principle of the present utility model is as follows:

[0055] During use, first adjust the stroke of the cylinder positioning frame, install the cylinder to be filled at the cylinder positioning hole, install the elastic wire snap ring, open the suction cup vacuum stop valve, and adsorb the piston valve body on the vacuum suction cup.

[0056] Cover the sealing cover and lock it with the quick clamp assembly, so that the sealing cover and the cylinder positioning frame enclose a sealed chamber. Then open the air chamber vacuum stop valve, observe the air chamber vacuum degree negative pressure gauge to make there be a certain pressure difference with the suction cup vacuum negative pressure gauge and keep it stable. After closing the air chamber vacuum stop valve, open the nitrogen stop valve and observe the nitrogen positive pressure gauge. When the pressure reaches the specified value, close the nitrogen stop valve, release the stroke of the stroke driving member, press the piston valve body into the cylinder to be filled to the specified height, close the nitrogen stop valve, open the air chamber air release valve, wait for the pressure to return to the chamber pressure, open the sealing cover, and manually install the elastic wire snap ring for positioning so that the piston valve body cannot come out. Finally, close the suction cup vacuum stop valve and open the suction cup air release valve, and a shock absorber gas filling process is completed.

[0057] Please refer to Figure 1 As shown in the figure, Embodiment 1 of the present utility model is: a shock absorber gas cylinder sealing gas filling device, including:

[0058] A cylinder positioning frame provided with a cylinder positioning hole;

[0059] The sealing cover is detachably connected to the cylinder body positioning frame, and the sealing cover and the cylinder body positioning frame enclose a sealed chamber;

[0060] The piston valve fixture is connected to the stroke driving member at one end. In this embodiment, the stroke driving member is an adjustable stroke compression cylinder, and the other end extends into the sealed chamber and is arranged opposite to the cylinder body positioning hole;

[0061] The vacuum regulating pipe extends into the sealed chamber;

[0062] The nitrogen connecting pipe extends into the sealed chamber.

[0063] It further includes a workbench, and both the cylinder body positioning frame and the stroke driving member are arranged on the workbench. The stroke driving member and the cylinder body positioning frame are arranged vertically on the workbench. The workbench is provided with guide rail columns in the vertical direction, and the cylinder body positioning frame is slidably connected to the guide rail columns. The cylinder body positioning frame is provided with a quick clamp assembly, and the quick clamp assembly is detachably connected to the sealing cover. The piston valve fixture includes a vacuum cylinder and a vacuum suction cup. The sealing cover has a mounting hole, and the vacuum cylinder is slidably fitted with the mounting hole. One end of the vacuum cylinder is connected to the stroke driving member, and the other end extends into the sealed chamber and is connected to the vacuum suction cup. Sealing rings are provided in both the cylinder body positioning hole and the mounting hole. The piston valve fixture further includes a vacuum pipe, and the vacuum pipe is connected to the vacuum cylinder. A suction cup vacuum negative pressure gauge and a suction cup stop valve are provided on the vacuum pipe, and a suction cup air release valve is provided on the vacuum cylinder. The vacuum cylinder is provided with a mounting portion for mounting an elastic wire retaining ring. An air chamber vacuum stop valve and an air chamber vacuum degree negative pressure gauge are provided on the vacuum regulating pipe, and a nitrogen stop valve and a nitrogen positive pressure gauge are provided on the nitrogen connecting pipe. An air chamber air release valve is provided on the side wall of the sealing cover.

[0064] In summary, for the shock absorber gas cylinder sealing and gas filling device of the present utility model, when in use, the cylinder to be filled is installed at the cylinder body positioning hole, the piston valve body is adsorbed by the piston valve fixture, the sealing cover is covered so that the sealing cover and the cylinder body positioning frame enclose a sealed chamber, then the vacuum degree of the sealed chamber is adjusted through the vacuum regulating pipe, and gas is filled through the nitrogen connecting pipe. When the pressure reaches the specified value, the piston valve fixture is controlled to move by the stroke driving member until the piston valve body is pressed into the specified height in the cylinder to be filled, then the sealed chamber is controlled to restore to the room pressure, and an elastic wire retaining ring is installed for limiting, so that the piston valve body will not come out of the cylinder to be filled, and a shock absorber gas filling process is completed. Compared with the traditional gas filling method, although the operation steps of this device are slightly cumbersome and there is no design for the recovery mechanism of excess nitrogen, resulting in a certain amount of loss, when filling gas into the air chamber, the gas in the air chamber can be discharged to ensure the purity of the added nitrogen, ensure the reliability of the shock absorption effect of the shock absorber air chamber, and can more intuitively control and ensure the gas pressure in the air chamber, effectively preventing the escape of the pressurized gas in the chamber when the piston valve is installed and positioned, and ensuring that the gas pressure in the air chamber meets the design value.

[0065] The above are only embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in the relevant technical fields, shall be similarly included within the patent protection scope of the present utility model.

Claims

1. Shock absorber gas cylinder sealing and gas filling device, characterized in that, Including: A cylinder block positioning frame provided with cylinder block positioning holes; A sealing cover detachably connected to the cylinder block positioning frame, and a sealing chamber is formed by enclosing the sealing cover and the cylinder block positioning frame; A piston valve fixture, one end of which is connected to a stroke driving member, and the other end extends into the sealing chamber and is arranged opposite to the cylinder block positioning holes; A vacuum regulating pipe extending into the sealing chamber; A nitrogen connecting pipe extending into the sealing chamber.

2. The shock absorber gas cylinder sealing and gas filling device according to claim 1, characterized in that, It further includes a workbench, and both the cylinder block positioning frame and the stroke driving member are arranged on the workbench.

3. The shock absorber gas cylinder sealing and gas filling device according to claim 2, characterized in that, The stroke driving member and the cylinder block positioning frame are arranged vertically on the workbench. Guide rail columns are provided on the workbench in the vertical direction, and the cylinder block positioning frame is slidably connected to the guide rail columns.

4. The shock absorber gas cylinder sealing and gas filling device according to claim 1, characterized in that The cylinder block positioning frame is provided with a quick clamp assembly, and the quick clamp assembly is detachably connected to the sealing cover.

5. The shock absorber gas cylinder sealing and gas filling device according to claim 1, characterized in that, The piston valve fixture includes a vacuum cylinder and a vacuum suction cup. The sealing cover has a mounting hole, and the vacuum cylinder is slidably fitted with the mounting hole. One end of the vacuum cylinder is connected to the stroke driving member, and the other end extends into the sealing chamber and is connected to the vacuum suction cup.

6. The shock absorber gas cylinder sealing and gas filling device according to claim 5, characterized in that, Sealing rings are provided in both the cylinder block positioning holes and the mounting holes.

7. The shock absorber gas cylinder sealing and gas filling device according to claim 5, characterized in that, The piston valve fixture further includes a vacuum pipe connected to the vacuum cylinder. A suction cup vacuum negative pressure gauge and a suction cup stop valve are provided on the vacuum pipe, and a suction cup air release valve is provided on the vacuum cylinder.

8. The shock absorber gas cylinder sealing and gas filling device according to claim 7, wherein, A mounting portion for mounting an elastic wire retaining ring is provided on the vacuum cylinder.

9. The shock absorber gas cylinder sealing and gas filling device according to claim 1, characterized in that A chamber vacuum stop valve and a chamber vacuum degree negative pressure gauge are provided on the vacuum regulating pipe, and a nitrogen stop valve and a nitrogen positive pressure gauge are provided on the nitrogen connecting pipe.

10. The shock absorber gas cylinder sealing and gas filling device according to claim 1, characterized in that, An air chamber air release valve is provided on the side wall of the sealing cover.

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