Gas spring with gas supply structure

Abstract

The utility model relates to the technical field of air springs, in particular to an air spring with an air supply structure, which comprises a piston cylinder, a fourth air cavity arranged inside the piston cylinder, a partition plate arranged above the fourth air cavity, a limit block arranged inside the partition plate, a third vent hole arranged on the surface of the limit block, and a table block slidably connected to the inner wall of the limit block. The table body block is fixedly connected with one end of an auxiliary spring, and the other end of the auxiliary spring is fixedly mounted on the inner wall of the upper end of the limiting block; by means of the fourth air cavity, the table body block and the auxiliary spring component, the function of automatically supplementing air when air in the air spring leaks is achieved, when the pressure in the air spring drops, the air in the fourth air cavity can be supplemented into the air spring in time by extruding the table body block and combining opening and closing of the sealing ring, and therefore the air spring is prevented from being damaged. Therefore, the stability of the internal pressure of the gas spring is effectively kept, and the problems of performance reduction and flexibility reduction caused by gas leakage are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gas springs, in particular to a gas spring with an air replenishing structure. Background Art

[0002] Gas springs are high-performance support and cushioning components widely used in a variety of machinery, equipment, furniture, and vehicles. Their operating principle is based on the pressure differential generated by gas compression and expansion. The piston rod's expansion and contraction achieve functions such as support, cushioning, braking, and height adjustment. The air filling mechanism is a key technology in gas spring design, used to maintain a stable internal pressure during operation. Gas spring performance can be affected by gas leaks, temperature fluctuations, or pressure drops caused by long-term use. Therefore, the design of the air filling mechanism is crucial to ensuring the stability and service life of the gas spring.

[0003] The gas springs commonly found on the market today will experience leakage of the expanded gas inside after long-term use. Although performance can be restored by replenishing air, this is usually only done when the performance of the gas spring has significantly deteriorated and there is a lot of internal gas leakage. This delayed replenishment method prevents people from replenishing the gas spring in time when the gas leaks, resulting in low flexibility. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a gas spring with an air replenishing structure, which can effectively solve the problem in the prior art that people cannot replenish the gas spring in time when the gas inside the gas spring leaks, resulting in low flexibility.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The utility model provides a gas spring with an air replenishing structure, comprising a piston cylinder, a fourth air cavity being provided inside the piston cylinder, a partition plate being provided above the fourth air cavity, a limiting block being provided inside the partition plate, a third air vent being provided on the surface of the limiting block, a platform block being slidably connected to the inner wall of the limiting block, one end of the auxiliary spring being fixedly connected to the platform block, the other end of the auxiliary spring being fixedly mounted on the inner wall of the upper end of the limiting block, and a sliding rod being provided above the limiting block.

[0007] Furthermore, a fourth ventilation hole is formed on the lower end surface of the partition plate, and the fourth ventilation hole is connected to a fourth air cavity.

[0008] Furthermore, a sealing ring is sleeved on the surface of the platform block, and the diameter of the sealing ring is the same as the aperture of the fourth vent hole.

[0009] Furthermore, a second vent hole is provided on the upper surface of the partition plate, and the second vent hole is connected to the second air cavity and the third air cavity.

[0010] Furthermore, the piston cylinder is slidably connected to the sliding rod, the sliding rod is riveted with the piston body, and the piston body is slidably mounted on the inner wall of the piston cylinder.

[0011] Furthermore, a first vent hole is opened on the surface of the piston body, and the first vent hole is connected with the first air cavity and the second air cavity.

[0012] Furthermore, an inflation tube is provided at the bottom end of the piston cylinder, a one-way valve is provided on the inflation tube sleeve, and the inflation tube is connected to a fourth air cavity.

[0013] Furthermore, an inflation hole is provided at the bottom end of the piston cylinder, and the inflation hole is connected to an inflation tube.

[0014] Beneficial effects

[0015] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0016] 1. The utility model realizes the function of automatically replenishing gas in the event of gas leakage in the gas spring through the fourth gas chamber, the platform block and the auxiliary spring component. When the internal pressure of the gas spring drops, the gas in the fourth gas chamber will squeeze the platform block and, combined with the opening and closing of the sealing ring, replenish the gas into the gas spring in a timely manner, thereby effectively maintaining the internal pressure of the gas spring stable and avoiding the problems of performance degradation and reduced flexibility caused by gas leakage;

[0017] 2. The utility model provides an additional air supply channel for the gas spring by setting up an inflation tube and a one-way valve. When external air supply is required, it is only necessary to inject gas into the inflation tube through the inflation hole. The gas can enter the fourth air chamber through the one-way valve to realize the air supply operation of the gas spring. This design not only simplifies the air supply process and improves the operational convenience, but also ensures the safety and reliability of the air supply process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0019] Figure 1 This is a structural diagram of a gas spring with an air-supplying structure proposed by the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model when viewed from above;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the piston cylinder of the utility model

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the partition plate of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the platform block connector of the utility model;

[0024] Figure 6 for Figure 3 A magnified schematic diagram of the structure in the middle.

[0025] Figure numerals: 1. Piston cylinder; 2. Slide rod; 3. Piston body; 4. First vent hole; 5. First air cavity; 6. Partition plate; 7. Second vent hole; 8. Second air cavity; 9. Third air cavity; 10. Third vent hole; 11. Limit block; 12. Auxiliary spring; 13. Platform block; 14. Fourth vent hole; 15. Inflation tube; 16. One-way valve; 17. Inflation hole; 18. Sealing ring; 19. Fourth air cavity. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0027] The present invention will be further described below with reference to the embodiments.

[0028] A gas spring with an air filling structure, see attached Figures 1-6, including a piston cylinder 1, a fourth air chamber 19 is provided inside the piston cylinder 1, a partition plate 6 is provided above the fourth air chamber 19, a limit block 11 is provided inside the partition plate 6, a third vent 10 is provided on the surface of the limit block 11, a platform block 13 is slidably connected to the inner wall of the limit block 11, a fourth vent 14 is provided on the lower end surface of the partition plate 6, the fourth vent 14 is connected to the fourth air chamber 19, a sealing ring 18 is provided on the surface of the platform block 13, and the diameter of the sealing ring 18 is the same as the aperture size of the fourth vent 14. When the gas inside the gas spring gradually leaks due to long-term use, resulting in a decrease in performance, the pressure above the partition plate 6 becomes smaller, and the fourth vent 14 is connected to the fourth air chamber 19. The fourth vent hole 14 is connected with the fourth air cavity 19. When the gas leaks, the gas in the fourth air cavity 19 will squeeze the platform block 13, and the platform block 13 will compress the auxiliary spring 12 and slide on 14. In combination with the sealing and opening functions of the sealing ring 18, the gas is adjusted and replenished in time to maintain the stability of the internal pressure of the gas spring. The platform block 13 is fixedly connected to one end of the auxiliary spring 12, and the other end of the auxiliary spring 12 is fixedly mounted on the inner wall of the upper end of the limit block 11. The upper end surface of the partition plate 6 is provided with a second vent hole 7. The second vent hole 7 is connected with the second air cavity 8 and the third air cavity 9. During the working process of the gas spring As the piston body 3 slides in the piston cylinder 1, the gas pressure and volume in the first air chamber 5, the second air chamber 8 and the third air chamber 9 will change. A sliding rod 2 is provided above the limit block 11. The piston cylinder 1 and the sliding rod 2 are slidably connected. The sliding rod 2 is riveted with the piston body 3. The piston body 3 is slidably mounted on the inner wall of the piston cylinder 1. The piston cylinder 1 and the sliding rod 2 are slidably connected to realize the telescopic adjustment of the gas spring. A first vent hole 4 is provided on the surface of the piston body 3. The first vent hole 4 is connected with the first air chamber 5 and the second air chamber 8. The piston body 3 riveted on the sliding rod 2 is tightly slidably mounted on the inner wall of the piston cylinder 1. The surface of the piston body 3 is provided with a The first vent hole 4 enables the first air chamber 5 and the second air chamber 8 to be connected to each other, and the contact area between the gas and the lower end of the piston body 3 is larger than the upper end of the piston body 3, so that 3 slides upward on the inner wall of 1. An inflation tube 15 is provided at the bottom end of the piston cylinder 1. The inflation tube 15 is sleeved with a one-way valve 16. The inflation tube 15 is connected to the fourth air chamber 19. An inflation hole 17 is opened at the bottom end of the piston cylinder 1. The inflation hole 17 is connected to the inflation tube 15. The one-way valve 16 ensures that the gas can only flow in one direction. The inflation tube 15 is further connected to the fourth air chamber 19, providing a channel for replenishing air for the gas spring, thereby facilitating the air replenishment operation of the gas spring.

[0029] Working principle: During use, when the gas inside the gas spring gradually leaks due to long-term use, resulting in a decline in performance, the pressure above the partition plate 6 will become smaller. At this time, due to the communication between the fourth vent hole 14 and the fourth air cavity 19, the gas in the fourth air cavity 19 will be replenished by squeezing the platform block 13. When the platform block 13 slides on the inner wall of the limit block 11, it will compress the auxiliary spring 12. At the same time, the sealing ring 18 on its surface gradually opens the fourth vent hole 14, thereby adjusting and replenishing the gas in time. When the inflation operation is completed, the air pressure in the fourth air cavity 19 is the same as that in the second air cavity 8 and the first air cavity 5. The deformation will be restored and the platform block 13 will be pushed to slide toward the fourth air vent 14. The sealing ring 18 on the platform block 13 will fit perfectly with the fourth air vent 14 again to keep the internal pressure of the gas spring stable. In addition, the inflation tube 15 at the bottom end of the piston cylinder 1 is connected to the fourth air chamber 19 through the one-way valve 16, providing an additional air supply channel for the gas spring. When external air supply is required, the gas can enter the inflation tube 15 through the inflation hole 17, and then enter the fourth air chamber 19 through the one-way valve 16, thereby realizing the air supply operation of the gas spring, thereby improving the flexibility and durability of the gas spring.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A gas spring with an air replenishing structure, comprising a piston cylinder (1), characterized in that: A fourth air cavity (19) is provided inside the piston cylinder (1), a partition plate (6) is provided above the fourth air cavity (19), a limit block (11) is provided inside the partition plate (6), a third vent hole (10) is provided on the surface of the limit block (11), the inner wall of the limit block (11) is slidably connected to a platform block (13), the platform block (13) is fixedly connected to one end of an auxiliary spring (12), the other end of the auxiliary spring (12) is fixedly mounted on the inner wall of the upper end of the limit block (11), and a slide rod (2) is provided above the limit block (11).

2. The gas spring with an air-supplementing structure according to claim 1, characterized in that: A fourth vent hole (14) is provided on the lower end surface of the partition plate (6), and the fourth vent hole (14) is connected to a fourth air cavity (19).

3. The gas spring with an air-supplementing structure according to claim 1, characterized in that: A sealing ring (18) is sleeved on the surface of the platform block (13), and the diameter of the sealing ring (18) is the same as the aperture of the fourth vent hole (14).

4. The gas spring with an air-supplementing structure according to claim 1, characterized in that: A second vent hole (7) is provided on the upper end surface of the partition plate (6), and the second vent hole (7) is connected to a second air cavity (8) and a third air cavity (9).

5. The gas spring with an air replenishing structure according to claim 1, characterized in that: The piston cylinder (1) and the slide rod (2) are slidably connected, the slide rod (2) is riveted with a piston body (3), and the piston body (3) is slidably mounted on the inner wall of the piston cylinder (1).

6. The gas spring with an air-supplementing structure according to claim 5, characterized in that: A first vent hole (4) is provided on the surface of the piston body (3), and the first vent hole (4) is connected to a first air cavity (5) and a second air cavity (8).

7. The gas spring with an air replenishing structure according to claim 1, characterized in that: An inflation tube (15) is provided at the bottom end of the piston cylinder (1), a one-way valve (16) is sleeved on the inflation tube (15), and the inflation tube (15) is connected to a fourth air chamber (19).

8. The gas spring with an air-supplementing structure according to claim 7, characterized in that: The bottom end of the piston cylinder (1) is provided with an air filling hole (17), and the air filling hole (17) is connected to an air filling pipe (15).

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