Desk air spring with variable resistance

Abstract

The utility model relates to a resistance-variable air spring for a table, which aims at solving the technical problems that the resistance of the current air spring for the table cannot be adjusted, the air spring can be abraded or damaged prematurely due to the fact that the air spring has too high resistance, and the air spring can not provide enough support for a table plate due to the fact that the air spring has too low resistance. A movable piston is connected into the cylinder barrel in a sliding mode, an orifice is formed in the movable piston, a piston rod is installed at one end of the movable piston, the piston rod penetrates through the cylinder barrel and is arranged outside the cylinder barrel, and a sealing ring is installed between the inner wall, above the movable piston, of the cylinder barrel and the piston rod. According to the utility model, the resistance of the air spring can be adjusted, and the situation that the air spring is abraded or damaged too early due to the fact that the air spring has too high resistance or the table plate cannot be supported enough due to the fact that the air spring has too low resistance is avoided; and therefore, self-adjustment can be performed according to the supporting force required by the table plate, and convenience is achieved.

Description

Technical Field

[0001] This utility model relates to the field of table gas springs, specifically a table gas spring with variable resistance. Background Technology

[0002] Study desks have become an essential piece of equipment for children's learning. They are generally equipped with adjustable tabletops that can be flipped up, down, or tilted to meet the needs of children for activities such as crafting, reading, writing, and drawing.

[0003] Traditional table gas springs cannot adjust their resistance. Excessive resistance can lead to premature wear or damage, while insufficient resistance may fail to provide adequate support for the tabletop. Therefore, a new technical solution is needed. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a table gas spring with variable resistance. This solves the technical problems of current table gas springs, which cannot adjust resistance, and where excessively high resistance may cause premature wear or damage, while excessively low resistance may not provide sufficient support for the tabletop.

[0005] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: A tabletop gas spring with variable resistance is designed, comprising a cylinder, a movable piston slidably connected inside the cylinder, an orifice on the movable piston, a piston rod installed at one end of the movable piston, the piston rod passing through the cylinder and positioned outside the cylinder, a sealing ring installed between the inner wall of the cylinder above the movable piston and the piston rod, a free piston slidably connected inside the cylinder below the movable piston, the cylinder below the free piston being filled with nitrogen, a through hole on one side of the cylinder, a pressure regulating cylinder installed on the outer side of the cylinder, the pressure regulating cylinder corresponding to and connected to the through hole, a screw threaded through one outer end of the pressure regulating cylinder, the screw threadedly connected to the pressure regulating cylinder, a pressure regulating piston slidably connected inside the pressure regulating cylinder, the screw connected to the pressure regulating piston, and a handwheel installed at one outer end of the screw.

[0006] Preferably, a guide bearing is installed between the cylinder interior above the sealing ring and the piston rod, and the guide bearing is slidably connected to the piston rod.

[0007] Preferably, the cylinder between the free piston and the sealing ring is filled with hydraulic oil.

[0008] Preferably, a rubber ring is installed at one end of the cylinder near the piston rod, the rubber ring is sleeved on the outside of the piston rod, and the rubber ring is elastic.

[0009] Preferably, limit blocks are installed on both sides of the inner cavity of the through hole, and the distance between the two limit blocks is less than the diameter of the pressure regulating piston.

[0010] Preferably, a first mounting lug is installed at one outer end of the piston rod, and a second mounting lug is installed at the end of the cylinder away from the piston rod.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model combines a cylinder, piston rod, free piston, moving piston, pressure regulating cylinder, through hole, pressure regulating piston, and screw. By holding the handwheel and rotating the screw, the position of the pressure regulating piston in the pressure regulating cylinder can be adjusted, thereby regulating the nitrogen pressure in the cylinder. This avoids the problem that excessively high resistance of the gas spring may lead to premature wear or damage, or that excessively low resistance may fail to provide sufficient support for the table. It can automatically adjust according to the required support force of the table, which is quite convenient.

[0013] 2. By incorporating hydraulic oil, this utility model not only helps to slow down the movement speed, but also acts as a damper, especially when the gas spring is extended to its end position, making the movement of the gas spring smoother and avoiding excessive impact or noise. Furthermore, the hydraulic oil inside the gas spring also acts as a lubricant, reducing friction and wear between components, thereby extending the service life of the gas spring. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is the overall sectional front view of the present invention;

[0016] Figure 3 This is an enlarged view of section A of this utility model.

[0017] In the diagram: 1. Cylinder; 11. Piston rod; 12. First mounting ear; 13. Second mounting ear; 14. Sealing ring; 15. Moving piston; 16. Orifice; 17. Free piston; 18. Hydraulic oil; 19. Nitrogen; 110. Through hole; 2. Pressure regulating cylinder; 21. Screw; 22. Handwheel; 23. Pressure regulating piston; 24. Limiting block; 3. Rubber ring; 4. Guide bearing. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Example 1: A tabletop gas spring with variable resistance, see [link to example]. Figures 1 to 3The system includes a cylinder 1, within which a movable piston 15 is slidably connected. The movable piston 15 has an opening 16. A piston rod 11 is mounted at one end of the movable piston 15, passing through the cylinder 1 and positioned outside the cylinder 1. A sealing ring 14 is installed between the inner wall of the cylinder 1 above the movable piston 15 and the piston rod 11. A free piston 17 is slidably connected within the cylinder 1 below the movable piston 15. The cylinder 1 below the free piston 17 is filled with nitrogen gas 19. A through hole 110 is provided on one side of the cylinder 1. A pressure regulating cylinder 2 is mounted on the outer side of the cylinder 1, corresponding to and communicating with the through hole 110. A screw 21 passes through one outer end of the pressure regulating cylinder 2, and the screw 21 is threadedly connected to the pressure regulating cylinder 2. A pressure regulating piston 23 is slidably connected within the pressure regulating cylinder 2, and the screw 21 is connected to the pressure regulating piston 23. A handwheel 22 is mounted on one outer end of the screw 21. The piston rod 11 has a first mounting lug 12 installed on one outer end, and the cylinder 1 has a second mounting lug 13 installed on the end away from the piston rod 11. During operation, the position of the pressure regulating piston 23 in the pressure regulating cylinder 2 can be adjusted by holding the handwheel 22 and rotating the screw 21. When the pressure regulating piston 23 moves towards the through hole 110, since the volume of nitrogen 19 and the volume of the cylinder 1 are fixed, the nitrogen 19 in the pressure regulating cylinder 2 is squeezed into the cylinder 1, thereby increasing the nitrogen 19 pressure in the cylinder 1 and thus increasing the resistance of the gas spring. When the pressure regulating piston 23 moves away from the through hole 110, the nitrogen 19 pressure in the cylinder 1 is reduced, thereby reducing the resistance of the gas spring. This avoids the gas spring from wearing out or being damaged prematurely if the resistance is too high, or from being unable to provide sufficient support for the table if the resistance is too low. The gas spring can be automatically adjusted according to the support force required by the table, which is quite convenient.

[0020] For details, see Figure 2 A guide bearing 4 is installed between the cylinder 1 above the sealing ring 14 and the piston rod 11. The guide bearing 4 is slidably connected to the piston rod 11. The guide bearing 4 can guide the movement of the piston rod 11, thereby further improving the stability of the piston rod 11 during extension and retraction.

[0021] Further, see Figure 2 The cylinder 1 between the free piston 17 and the sealing ring 14 is filled with hydraulic oil 18. The hydraulic oil 18 not only helps to slow down the movement speed, but also acts as a damper, especially when the gas spring is extended to the end position, making the movement of the gas spring smoother and avoiding excessive impact or noise. In addition, the hydraulic oil 18 can also act as a lubricant inside the gas spring, reducing friction and wear between the components, thereby extending the service life of the gas spring.

[0022] It is worth noting that, see Figure 2 A rubber ring 3 is installed at one end of the cylinder 1 near the piston rod 11. The rubber ring 3 is sleeved on the outside of the piston rod 11 and is elastic. By setting the rubber ring 3, the sealing effect between the piston rod 11 and the guide bearing 4 can be increased, thereby preventing it from entering the cylinder 1 and affecting the service life of the gas spring.

[0023] It is worth noting that, see Figure 3 Limiting blocks 24 are installed on both sides of the inner cavity of the through hole 110. The distance between the two limiting blocks 24 is less than the diameter of the pressure regulating piston 23. By setting the limiting blocks 24, the movement of the pressure regulating piston 23 can be limited, thereby preventing the pressure regulating piston 23 from entering the cylinder 1 and affecting the subsequent gas spring resistance adjustment.

[0024] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0025] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A tabletop gas spring with variable resistance, comprising a cylinder (1), characterized in that, A movable piston (15) is slidably connected inside the cylinder (1). An orifice (16) is provided on the movable piston (15). A piston rod (11) is installed at one end of the movable piston (15). The piston rod (11) passes through the cylinder (1) and is located outside the cylinder (1). A sealing ring (14) is installed between the inner wall of the cylinder (1) above the movable piston (15) and the piston rod (11). A free piston (17) is slidably connected inside the cylinder (1) below the movable piston (15). The cylinder (1) below the free piston (17)... The cylinder is filled with nitrogen (19). A through hole (110) is provided on one side of the cylinder (1). A pressure regulating cylinder (2) is installed on the outside of the cylinder (1). The pressure regulating cylinder (2) corresponds to and is connected to the through hole (110). A screw (21) passes through one end of the outside of the pressure regulating cylinder (2). The screw (21) is threadedly connected to the pressure regulating cylinder (2). A pressure regulating piston (23) is slidably connected inside the pressure regulating cylinder (2). The screw (21) is connected to the pressure regulating piston (23). A handwheel (22) is installed on one end of the outside of the screw (21).

2. A table gas spring with variable resistance as described in claim 1, characterized in that, A guide bearing (4) is installed between the cylinder (1) above the sealing ring (14) and the piston rod (11), and the guide bearing (4) is slidably connected to the piston rod (11).

3. A tabletop gas spring with variable resistance as described in claim 1, characterized in that, Hydraulic oil (18) is injected into the cylinder (1) between the free piston (17) and the sealing ring (14).

4. A tabletop gas spring with variable resistance as described in claim 1, characterized in that, A rubber ring (3) is installed at one end of the cylinder (1) near the piston rod (11). The rubber ring (3) is fitted on the outside of the piston rod (11) and is elastic.

5. A tabletop gas spring with variable resistance as described in claim 1, characterized in that, Limiting blocks (24) are installed on both sides of the inner cavity of the through hole (110), and the distance between the two limiting blocks (24) is less than the diameter of the pressure regulating piston (23).

6. A tabletop gas spring with variable resistance as described in claim 1, characterized in that, The piston rod (11) has a first mounting lug (12) installed at one end of its outer side, and the cylinder (1) has a second mounting lug (13) installed at the end of its outer side away from the piston rod (11).

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