Stepless limit air spring

Abstract

The utility model discloses a kind of stepless limit air springs, the one end of cylinder barrel opening is fixedly connected to plug, the inside of cylinder barrel is equipped with inner plug, and the inside plug is connected with the floating piston between inner plug rolling, the one end of inner plug away from floating piston is equipped with inner cylinder barrel, the inner plug and inner cylinder barrel are equipped with large flow hole, the inside of inner cylinder barrel is equipped with moving block, the one end of moving block towards floating piston is equipped with sealing washer, the moving block is fixedly connected spring, the other end of spring is fixedly connected piston, the inside of piston is equipped with oil cavity C, the inside sealing end of cylinder barrel is fixedly equipped with guide sleeve, the inside of guide sleeve is equipped with connecting sleeve;It is realized that size is shorter under double-spring condition by double-spring inside and outside stacking mode, size space problem cannot be realized in arbitrary position to stay, and opening resistance set needs to be overcome to open before each start.

Description

Technical Field

[0001] This utility model relates to the field of gas spring technology, specifically to a stepless limit gas spring. Background Technology

[0002] Gas springs are a common component. Conventional gas springs help open doors and windows. Existing gas springs, single springs cannot adjust the damping force in two directions, and double spring products are too long. Therefore, size and space issues prevent gas springs from stopping at any position. Utility Model Content

[0003] The purpose of this utility model is to provide a continuously variable gas spring to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a stepless limit gas spring, comprising a cylinder, a plug fixedly connected to one end of the cylinder opening, an inner plug provided inside the cylinder, a floating piston rollingly connected between the inner plug and the inner plug, an inner cylinder provided at the end of the inner plug away from the floating piston, a large flow orifice provided on the inner plug and the inner cylinder, a moving block provided inside the inner cylinder, a sealing gasket provided at the end of the moving block facing the floating piston, a spring fixedly connected to the moving block, a piston fixedly connected to the other end of the spring, an oil chamber C provided inside the piston, a guide sleeve fixedly provided at the sealed end inside the cylinder, a connecting sleeve provided inside the guide sleeve, a piston rod provided at the sealed end of the cylinder, the piston rod penetrating one end of the cylinder, and a second plug provided on the piston rod.

[0005] Preferably, the space between the floating piston and the inner plug is oil chamber A, the oil chamber C is a full oil chamber, the internal area of ​​the inner plug, the inner cylinder and the cylinder where the piston is located is oil chamber B, the guide sleeve and the second plug are provided with oil chamber D, and the cylinder is filled with nitrogen.

[0006] Preferably, a spring is sleeved on the outer wall of the inner cylinder.

[0007] Preferably, the piston is provided with a damping hole, and the guide sleeve and the second plug are provided with a large flow rate hole B.

[0008] Preferably, the inner plug and the inner cylinder are isolated and sealed by a sealing gasket.

[0009] Compared with the prior art, the beneficial effects of this utility model are: by stacking the inner and outer double springs, the size is made shorter in the case of double springs, which makes up for the inability to stop at any position due to size and space issues, and the need to overcome the set opening resistance before each start-up. Attached Figure Description

[0010] Figure 1This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the compressed state of this utility model; Figure 3 This is a schematic diagram of the extended state of this utility model.

[0011] In the diagram: 1. Cylinder; 2. Plug; 3. Inner plug; 4. Floating piston; 5. Inner cylinder; 6. Large flow orifice A; 7. Moving block; 8. Sealing gasket; 9. Spring; 10. Piston; 11. Guide sleeve; 12. Connecting sleeve; 13. Second plug; 14. Guide sleeve; 15. Piston rod. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0013] Please refer to 1, an embodiment of this utility model: a stepless limit gas spring, including a cylinder 1, a plug 2 fixedly connected to one end of the cylinder 1 opening, an inner plug 3 provided inside the cylinder 1, a floating piston 4 rollingly connected between the inner plug 2 and the inner plug 3, an inner cylinder 5 provided at the end of the inner plug 3 away from the floating piston 4, a large flow orifice A6 provided on the inner plug 3 and the inner cylinder 5, a moving block 7 provided inside the inner cylinder 5, a sealing gasket 8 provided at the end of the moving block 7 facing the floating piston 4, a spring 9 fixedly connected to the moving block 7, a piston 10 fixedly connected to the other end of the spring 9, an oil chamber C11 provided inside the piston 10, a guide sleeve 14 fixedly provided at the sealing end inside the cylinder 1, a connecting sleeve 12 provided inside the guide sleeve 14, a piston rod 15 provided at the sealing end of the cylinder 1, the piston rod 15 passing through one end of the cylinder 1, and a second plug 13 provided on the piston rod 15.

[0014] The space between the floating piston 4 and the inner plug 3 is the oil chamber A. The oil chamber C11 is a full oil chamber. The internal area of ​​the cylinder 1 where the inner plug 3, the inner cylinder 5, and the piston 10 are located is the oil chamber B. The guide sleeve 14 and the second plug 13 are provided with oil chamber D. The cylinder 1 is filled with nitrogen. The outer wall of the inner cylinder 5 is fitted with a spring 9. The piston 10 is provided with a damping hole. The guide sleeve 14 and the second plug 13 are provided with a large flow hole B. The inner plug 3 and the inner cylinder 5 are isolated and sealed by a sealing gasket 8.

[0015] Please refer to 2. In the compressed state, the gas spring is filled with nitrogen pressure. When the piston rod 15 is compressed, the pressure in oil chamber A rises, and the oil pushes the sealing gasket through the plug 3, causing the inner cylinder 5 to move to the right and compress the spring 9. Since the oil chamber C is a full oil chamber, the inner cylinder 5 must discharge the oil through the damping hole to move to the right. The damping hole is small, and under the combined action of the spring 9, it generates a large resistance. Therefore, there will be a large resistance when it is first opened. However, after the flow channel is fully opened, the oil quickly passes through the large flow hole, through the oil chamber B, and through the sealing ring. The downward pressure resistance is rapidly reduced, and the piston rod 15 is compressed to the left. When it stops at any stroke, the sealing gasket and the inner cylinder 5 are reset under the action of the spring 9, the channel is closed, and the piston rod 15 stops at the current position. The above action is repeated when it is compressed again.

[0016] Please refer to 3. When the piston rod 15 is fully compressed and then unfolded: When the piston rod 15 is pulled out to the right, the pressure in the oil chamber D increases, and the oil flows through the hole in the connecting sleeve 12 and through the second plug 13, pushing the sealing gasket and causing the piston 10 to move to the left to compress the spring 9. The oil in the oil chamber C flows out through the damping hole, generating assistance. When the sealing gasket is fully opened, it flows out through the large flow hole B and pushes the sealing ring into the oil chamber A through the oil chamber B. At this time, the piston rod 15 moves to the right. After stopping at any position, the spring 9 pushes the inner cylinder 5 piston to return to its original position, and the sealing gasket and the connecting sleeve 12 fit together to form a seal and lock, and the piston rod stops moving.

Claims

1. A continuously variable gas spring, comprising a cylinder (1), characterized in that: One end of the cylinder (1) is fixedly connected to a plug (2). An inner plug (3) is provided inside the cylinder (1). A floating piston (4) is rolled between the inner plug (2) and the inner plug (3) of the cylinder (1). An inner cylinder (5) is provided at the end of the inner plug (3) away from the floating piston (4). A large flow orifice A (6) is provided on the inner plug (3) and the inner cylinder (5). A moving block (7) is provided inside the inner cylinder (5). The end of the moving block (7) facing the floating piston (4) is provided with a large flow orifice A (6). There is a sealing gasket (8), the moving block (7) is fixedly connected to a spring (9), the other end of the spring (9) is fixedly connected to a piston (10), the piston (10) is provided with an oil chamber C (11), the cylinder (1) is fixedly provided with a guide sleeve (14) at the sealed end, the guide sleeve (14) is provided with a connecting sleeve (12), the cylinder (1) is provided with a piston rod (15) at the sealed end, the piston rod (15) passes through one end of the cylinder (1), and the piston rod (15) is provided with a second plug (13).

2. The stepless limit gas spring according to claim 1, characterized in that: The space between the floating piston (4) and the inner plug (3) is the oil chamber A. The oil chamber C (11) is a full oil chamber. The internal area of ​​the cylinder (1) where the inner plug (3), inner cylinder (5) and piston (10) are located is the oil chamber B. The guide sleeve (14) and the second plug (13) are provided with oil chamber D. The cylinder (1) is filled with nitrogen.

3. The stepless limit gas spring according to claim 1, characterized in that: The inner cylinder (5) is fitted with a spring (9) on its outer wall.

4. The stepless limit gas spring according to claim 1, characterized in that: The piston (10) is provided with a damping hole, and the guide sleeve (14) and the second plug (13) are provided with a large flow rate hole B.

5. The stepless limit gas spring according to claim 1, characterized in that: The inner plug (3) and the inner cylinder (5) are isolated and sealed by a sealing gasket (8).

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