Adjustable gas spring

Abstract

The utility model relates to the technical field of gas springs, and discloses an adjustable gas spring which comprises a cylinder body and a piston rod. Top connecting plates are installed at the top and the bottom of the annular connecting plate, a limiting inserting column is connected to the center of the top connecting plate in an inserted mode, limiting side plates are installed on the upper portion and the lower portion of the surface of the limiting inserting column, the surface of the limiting inserting column is sleeved with a reset spring, and first limiting holes are formed in the two sides of the center of the top connecting plate; and second limiting holes are formed in the top and the bottom of the annular sleeve plate. According to the adjustable gas spring, after an annular sleeve plate is driven by a piston rod to move to the center of an inner cavity of an annular connecting plate, a limiting inserting column drives a limiting side plate to pass through a first limiting hole under the action of a reset spring, and the limiting inserting column and the limiting side plate are inserted into a second limiting hole; according to the structure, the requirement for the installation space is small, meanwhile, the manufacturing precision is low, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas springs, in particular to an adjustable gas spring. Background Art

[0002] Gas springs, also known as support rods, gas supports, angle adjusters, etc., are industrial accessories that use the principle of gas compression and expansion to generate elastic force. Gas springs are filled with inert gas or oil-gas mixture in a closed pressure cylinder, so that the pressure in the cavity is several times or dozens of times higher than the atmospheric pressure. Since the cross-sectional area of ​​the piston rod is smaller than the cross-sectional area of ​​the piston, a pressure difference is generated on both sides of the piston, and this pressure difference is used to achieve the movement of the piston rod. An adjustable gas spring is a gas spring with a special design that allows its performance to be adjusted within a certain range.

[0003] Common adjustable gas springs are usually composed of pressure cylinders, piston rods, pistons, sealing guide sleeves, fillers, control elements, joints, and mounting parts. Adjustable gas springs are based on conventional gas springs. By adding additional auxiliary devices or integrating electronic control units, the gas pressure, volume and other parameters inside the gas spring can be adjusted, thereby changing its stiffness and support force.

[0004] The stability of the traditional adjustable gas spring locking device is poor. When the force received exceeds the locking force, the locking function will no longer be effective. It cannot remain locked under pressure during use, and the effect during use is poor. In order to solve the above problems, some adjustable gas springs are provided with threads on the piston rod, and the position of the piston rod is fixed by rotating the nut or locking sleeve. The threaded locking method fixes the position of the piston rod by rotating the nut or locking sleeve. This mechanical connection usually has high stability and reliability, and can ensure that the gas spring will not move due to external force or internal pressure changes in the locked state. However, in this method, since the threaded locking method requires the use of components such as nuts or locking sleeves, and components such as nuts or locking sleeves require a certain amount of installation space to accommodate, the threaded locking method requires a large installation space. At the same time, in order to ensure the effect of threaded locking, it is necessary to ensure the accuracy and fit of the thread, which makes the thread accuracy requirements high, and high-precision threads will increase the cost of use. For this reason, an adjustable gas spring is proposed. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an adjustable gas spring to solve the above-mentioned technical problems of large installation space requirement, high thread precision requirement and increased use cost.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: an adjustable gas spring, comprising:

[0007] A cylinder body, and a piston disposed in the inner cavity of the cylinder body, with a sealing gasket connected to the outer surface of the piston, and a piston rod connected to the outer side of the piston and extending outward through the inner wall of the cylinder body;

[0008] The annular connecting plate is arranged at the end of the cylinder body, and the top connecting plate is installed at the top and bottom of the annular connecting plate, and a limit plug column is inserted and connected at the center of the top connecting plate, and the limit side plates are installed at the upper and lower parts of the surface of the limit plug column, and a return spring is sleeved on the surface of the limit plug column, and first limit holes are opened on both sides of the center of the top connecting plate, corresponding to the limit side plates;

[0009] The annular sleeve is arranged on the surface of the piston rod, and the top and bottom of the annular sleeve are provided with second limiting holes, which correspond to the limiting plugs and the limiting side plates. After the annular sleeve is driven by the piston rod to move to the inner cavity center of the annular connecting plate, the limiting plugs drive the limiting side plates through the first limiting holes under the action of the reset spring, and the limiting plugs and the limiting side plates are inserted into the second limiting holes, so that the annular connecting plate is connected to the piston rod through the annular sleeve, and then the limiting plugs drive the limiting side plates to rotate on the top connecting plate, so that the limiting side plates are misaligned with the first limiting holes and the second limiting holes. On the one hand, this structure has a small demand for installation space, and the low manufacturing precision reduces the cost; on the other hand, this structure ensures the stability of the connection between the piston rod and the annular connecting plate.

[0010] Preferably, an oil outlet is provided at the center of the top outer side of the cylinder body, and the sealing gasket is tightly fitted to the inner wall of the cylinder body. Inert gas is added or released through the oil outlet, and the gas content can control the rise and fall of the piston rod.

[0011] Preferably, a fixed end plate is installed at the outer end of the piston rod, and a compression spring is provided at the center of the inner cavity of the fixed end plate, so that the compression spring can drive the connection structure to move in the inner cavity of the fixed end plate.

[0012] Preferably, fixed plugs are installed at the center of the upper and lower parts of the inner cavity of the fixed end plate, and the inner ends of the fixed plugs are connected to the extrusion springs, and the outer ends of the fixed plugs extend outward through the inner wall of the fixed end plate. The extrusion springs drive the fixed plugs to move outward along the inner wall of the fixed end plate, and enable the fixed plugs to be connected to the corresponding structure.

[0013] Preferably, a rotating handle is provided at the top center of the top connecting plate, and the bottom of the rotating handle is coaxially connected to the end of the limiting plug column. The rotating handle drives the limiting plug column to rotate on the top connecting plate.

[0014] Preferably, the upper and lower center positions of the outer side surface of the annular sleeve are rotatably connected with adjustment rods, and the adjustment rods are inserted and connected with the fixed end plate. The surface of the adjustment rod is evenly provided with adjustment holes, and the adjustment holes correspond to the fixed plug posts. The position of the annular sleeve on the piston rod can be adjusted by moving the adjustment rod on the fixed end plate. When the position is adjusted, the adjustment rod can be rotated to make the adjustment hole correspond to the fixed plug post, and the fixed plug post is inserted into the inside of the adjustment hole under the action of the extrusion spring for connection. Not only can the position of the annular sleeve be adjusted according to the use of the piston rod, but also the disassembly and assembly operation between the adjustment rod and the fixed end plate is convenient.

[0015] Compared with the prior art, the utility model provides an adjustable gas spring, which has the following beneficial effects:

[0016] The adjustable gas spring drives the annular sleeve to move to the center of the inner cavity of the annular connecting plate through the piston rod, and then the limit pin drives the limit side plate through the first limit hole under the action of the reset spring, and the limit pin and the limit side plate are inserted into the second limit hole, so that the annular connecting plate is connected to the piston rod through the annular sleeve. This structure has a small demand for installation space and low manufacturing precision, which reduces costs. The limit pin then drives the limit side plate to rotate on the top connecting plate, so that the limit side plate is misaligned with the first limit hole and the second limit hole, so that this structure ensures the stability of the connection between the piston rod and the annular connecting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the piston rod and its connection structure of the utility model;

[0019] Figure 3 This is a cross-sectional structural diagram of a fixed end plate of the utility model;

[0020] Figure 4 It is a schematic diagram of the sectional structure of the annular connecting plate and the annular sleeve plate being separated in the utility model.

[0021] In the figure: 1. cylinder body; 2. oil outlet; 3. piston; 4. sealing gasket; 5. piston rod; 6. fixed end plate; 7. extrusion spring; 8. fixed plug post; 9. annular connecting plate; 10. top connecting plate; 11. rotating handle; 12. limit plug post; 13. first limit hole; 14. limit side plate; 15. reset spring; 16. annular sleeve plate; 17. second limit hole; 18. adjusting rod; 19. adjusting hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides a technical solution, an adjustable gas spring, comprising: Figure 1 , Figure 2 , a cylinder body 1, and a piston 3 disposed in the inner cavity of the cylinder body 1, and a sealing gasket 4 is connected to the outer surface of the piston 3, and a piston rod 5 is connected to the outer side of the piston 3 and extends outward through the inner wall of the cylinder body 1;

[0024] See also Figure 4 , an annular connecting plate 9 is arranged at the end of the cylinder body 1, and a top connecting plate 10 is installed on the top and bottom of the annular connecting plate 9, and a limit plug 12 is inserted and connected in the center of the top connecting plate 10, and a limit side plate 14 is installed on the upper and lower parts of the surface of the limit plug 12, and a return spring 15 is sleeved on the surface of the limit plug 12, and first limit holes 13 are opened on both sides of the center of the top connecting plate 10, corresponding to the limit side plates 14;

[0025] The annular sleeve 16 is arranged on the surface of the piston rod 5, and the top and bottom of the annular sleeve 16 are provided with second limiting holes 17, which correspond to the limiting plug 12 and the limiting side plate 14. After the piston rod 5 drives the annular sleeve 16 to move to the inner cavity center of the annular connecting plate 9, the limiting plug 12 drives the limiting side plate 14 through the first limiting hole 13 under the action of the reset spring 15, and the limiting plug 12 and the limiting side plate 14 are inserted into the second limiting hole 17, so that the annular connecting plate 9 is connected with the piston rod 5 through the annular sleeve 16, and then the limiting plug 12 drives the limiting side plate 14 to rotate on the top connecting plate 10, so that the limiting side plate 14 is misaligned with the first limiting hole 13 and the second limiting hole 17. On the one hand, the structure has a small demand for installation space, and the low manufacturing precision reduces the cost; on the other hand, the structure ensures the stability of the connection between the piston rod 5 and the annular connecting plate 9.

[0026] See also Figure 1 , Figure 2 An oil outlet 2 is provided at the center of the top outer side of the cylinder body 1, and the sealing gasket 4 is tightly fitted to the inner wall of the cylinder body 1. Inert gas is added or released through the oil outlet 2, and the content of the gas can control the rise and fall of the piston rod 5.

[0027] See also Figure 3, a fixed end plate 6 is installed at the outer end of the piston rod 5, and a compression spring 7 is added at the center position of the inner cavity of the fixed end plate 6. The compression spring 7 can drive the connection structure to move in the inner cavity of the fixed end plate 6. A fixed plug 8 is installed at the center position of the upper and lower parts of the inner cavity of the fixed end plate 6, and the inner end of the fixed plug 8 is connected to the compression spring 7, and the outer end of the fixed plug 8 extends outward through the inner wall of the fixed end plate 6. The compression spring 7 drives the fixed plug 8 to move outward along the inner wall of the fixed end plate 6, and enables the fixed plug 8 to be connected to the corresponding structure.

[0028] See also Figure 4 , a rotating handle 11 is provided at the top center of the top connecting plate 10, and the bottom of the rotating handle 11 is coaxially connected to the end of the limiting plug 12. The rotating handle 11 drives the limiting plug 12 to rotate on the top connecting plate 10. An adjusting rod 18 is rotatably connected at the upper and lower center positions of the outer surface of the annular sleeve 16, and the adjusting rod 18 is inserted and connected with the fixed end plate 6. Adjusting holes 19 are evenly opened on the surface of the adjusting rod 18, and the adjusting holes 19 correspond to the fixed plug 8. The position of the annular sleeve 16 on the piston rod 5 can be adjusted by moving the adjusting rod 18 on the fixed end plate 6. When the position adjustment is completed, the adjusting rod 18 can be rotated to make the adjusting hole 19 correspond to the fixed plug 8, and the fixed plug 8 is inserted into the inside of the adjusting hole 19 under the action of the extrusion spring 7 for connection. Not only can the position of the annular sleeve 16 be adjusted according to the use of the piston rod 5, but also the disassembly and assembly operation between the adjusting rod 18 and the fixed end plate 6 is convenient.

[0029] This solution: After the piston rod 5 drives the annular sleeve 16 to move to the inner cavity center of the annular connecting plate 9, the limiting plug 12 drives the limiting side plate 14 through the first limiting hole 13 under the action of the reset spring 15, and the limiting plug 12 and the limiting side plate 14 are inserted into the second limiting hole 17, so that the annular connecting plate 9 is connected to the piston rod 5 through the annular sleeve 16, and the rotating handle 11 drives the limiting plug 12 to rotate on the top connecting plate 10, and then the limiting plug 12 drives the limiting side plate 14 to rotate on the top connecting plate 10, so that the limiting side plate 14 is misaligned with the first limiting hole 13 and the second limiting hole 17. The adjusting rod 18 can be moved on the fixed end plate 6 to adjust the position of the annular sleeve 16 on the piston rod 5. When the position adjustment is completed, the adjusting rod 18 can be rotated to make the adjustment hole 19 correspond to the fixed plug 8, and the fixed plug 8 is inserted into the inside of the adjustment hole 19 under the action of the extrusion spring 7 for connection.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable gas spring, characterized in that: include: A cylinder body (1), and a piston (3) disposed in the inner cavity of the cylinder body (1), with a sealing gasket (4) connected to the outer surface of the piston (3), and a piston rod (5) connected to the outer side of the piston (3) and extending outward through the inner wall of the cylinder body (1); An annular connecting plate (9) is arranged at the end of the cylinder body (1), and a top connecting plate (10) is installed at the top and bottom of the annular connecting plate (9), and a limit plug post (12) is inserted and connected at the center of the top connecting plate (10), and a limit side plate (14) is installed on the upper and lower parts of the surface of the limit plug post (12), and a return spring (15) is sleeved on the surface of the limit plug post (12), and first limit holes (13) are opened on both sides of the center of the top connecting plate (10) and correspond to the limit side plates (14); The annular sleeve (16) is arranged on the surface of the piston rod (5), and second limiting holes (17) are provided at the top and bottom of the annular sleeve (16) and correspond to the limiting plug column (12) and the limiting side plate (14).

2. The adjustable gas spring according to claim 1, characterized in that: An oil outlet (2) is provided at the center of the outer top of the cylinder body (1), and the sealing gasket (4) is tightly fitted to the inner wall of the cylinder body (1).

3. The adjustable gas spring according to claim 1, characterized in that: A fixed end plate (6) is mounted on the outer end of the piston rod (5), and a compression spring (7) is provided at the center of the inner cavity of the fixed end plate (6).

4. The adjustable gas spring according to claim 3, characterized in that: Fixed plug posts (8) are installed at the center positions of the upper and lower parts of the inner cavity of the fixed end plate (6), and the inner ends of the fixed plug posts (8) are connected to the extrusion springs (7), while the outer ends of the fixed plug posts (8) extend outward through the inner wall of the fixed end plate (6).

5. The adjustable gas spring according to claim 1, characterized in that: A rotating handle (11) is provided at the top center of the top connecting plate (10), and the bottom of the rotating handle (11) is coaxially connected to the end of the limiting plug column (12).

6. The adjustable gas spring according to claim 4, characterized in that: An adjusting rod (18) is rotatably connected to the upper and lower center positions of the outer side surface of the annular sleeve plate (16), and the adjusting rod (18) is plug-connected to the fixed end plate (6). The surface of the adjusting rod (18) is evenly provided with adjusting holes (19), and the adjusting holes (19) correspond to the fixed plug posts (8).

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