Retention type gas spring

Abstract

The utility model discloses a retention type gas spring which comprises a cylinder body, a piston rod is connected in the cylinder body in a sliding mode, a retention mechanism is arranged in the cylinder body, the retention mechanism comprises a piston assembly, a piston assembly and a gas spring assembly, the piston assembly comprises a piston installed at one end of the piston rod, and the surface of the piston is connected with the interior of the cylinder body in a sliding mode; the utility model relates to the technical field of gas springs. According to the retention type gas spring, the piston assembly is arranged, so that the gas spring device can stop at any position when stretching or compressing, the retention type gas spring device is suitable for equipment or instruments with different angles or heights adjusted, and the practicability of the gas spring device is improved; according to the gas spring device, the positioning operation of the ejector rod in a stop state at any position is realized, so that the sealing plug is always positioned in the circulating groove, gas circulation between the upper cavity and the lower cavity is avoided, the gas spring device is always kept at a required length, and the stability of the gas spring device is improved.

Description

Technical Field

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

[0002] The reference patent name is: New retention type gas spring (patent publication number: CN218408286U, patent publication date: 2023.01.31), including a first air channel and a second air channel; the first air channel is connected to the rodless chamber; the second air channel is connected to the rod chamber; a third air channel and a fourth air channel are connected in parallel between the first air channel and the second air channel; a first one-way valve is provided on the third air channel; a second one-way valve is provided on the fourth air channel; the opening and closing states of the first one-way valve and the second one-way valve are opposite; the first one-way valve and the second one-way valve are opened and closed by the extension and contraction of the piston rod. When the piston rod is extended and contracted, the first one-way valve or the second one-way valve will be driven to open, and the gas in the rod chamber and the rodless chamber will be converted until the pressure in the rod chamber and the rodless chamber is kept consistent; not only can the piston rod be stopped at any position, but it only needs to be filled with gas. Compared with traditional gas springs, it has a simple structure, is easy to install, and has low cost.

[0003] Based on what is stated in the above-mentioned document: In recent years, with the improvement of people's living standards, people have higher and higher requirements for daily necessities, and furniture with adjustable height is increasingly sought after by people. Gas springs are a type of component mainly used for adjusting furniture, but existing gas springs can only be extended and retracted throughout the entire range and cannot stop at any distance. In addition, after the existing gas springs are extended and retracted, the internal sealing structure will wear out after long-term use, resulting in air leakage or oil leakage, which affects the stability of the gas spring. For this reason, the utility model provides a retention-type gas spring. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a retention type gas spring, which solves the problem that the existing gas spring can only be extended and retracted throughout the entire range and cannot stop at any distance, and that after the existing gas spring is extended and retracted, the internal sealing structure will wear out after long-term use, resulting in air leakage or oil leakage, which affects the stability of the gas spring.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a retention type gas spring, comprising a cylinder, a piston rod slidably connected to the interior of the cylinder, and a retention mechanism provided inside the cylinder, the retention mechanism comprising:

[0006] The piston assembly includes a piston mounted on one end of a piston rod, the surface of the piston being slidably connected to the interior of the cylinder, the surface of the piston being provided with multiple sets of sealing rings, the surfaces of the sealing rings being in contact with the inner wall of the cylinder, the interior of the piston being provided with a flow groove, the interior of the piston being slidably connected to a push rod, one end of the push rod being fixedly connected to a sealing block, and the bottom of the sealing block being fixedly connected to a symmetrical sealing plug;

[0007] The positioning assembly is arranged at the other end of the piston rod and is used to position the push rod.

[0008] Preferably, a hole groove is opened inside the piston, and a return spring is fixedly connected to the top of the inner cavity of the hole groove, and one end of the return spring is fixedly connected to the surface of the push rod.

[0009] Preferably, the positioning assembly includes a connecting block installed at the other end of the piston rod, the inner wall of the connecting block is fixedly connected to a symmetrical positioning rod, the surface of the positioning rod is slidably connected to a sliding block, the left side of the sliding block is rotatably connected to a control rod, the surface of the control rod is fixedly connected to a limiting rod, one end of the control rod is fixedly connected to the control block, the right side of the sliding block is fixedly connected to the positioning block, the right side of the sliding block is fixedly connected to a control spring, one end of the control spring is fixedly connected to the inner wall of the connecting block, the inner wall of the connecting block is fixedly connected to a limiting plate, and the interior of the limiting plate is clamped with the surface of the limiting rod.

[0010] Preferably, the surface of the push rod is slidably connected to the inside of the piston rod, and the other end of the push rod extends through to the outside of the connecting block.

[0011] Preferably, a positioning groove is provided on the surface of the push rod, and the inner surface of the positioning groove is slidably connected to the surface of the positioning block.

[0012] Preferably, a rod end joint is installed on the right side of the connecting block, and a pipe end joint is installed on the top end of the cylinder body.

[0013] Beneficial effects

[0014] The utility model provides a retention type gas spring. Compared with the prior art, it has the following advantages:

[0015] (1) The retention type gas spring pulls the piston rod to make the piston slide inside the cylinder. The sliding of the piston squeezes the gas in the lower cavity. At this time, the gas in the lower cavity squeezes the sealing plug through the circulation groove, thereby separating the sealing plug from the circulation groove, causing the sealing block and the top rod to slide upward synchronously, so that the reset spring is compressed, and the gas in the lower cavity enters the upper cavity through the circulation groove. When the length of the piston rod and the cylinder body is adjusted, the reset spring begins to reset, so that the sealing block and the sealing plug re-seal the circulation groove to avoid the circulation of gas and maintain the length of retention, so that the piston rod can stop at any position. By providing a piston assembly, the gas spring device can stop at any position when extending or compressing, so that it is suitable for equipment or instruments with different angles or height adjustments, thereby improving the practicality of the gas spring device.

[0016] (2) The retention type gas spring drives the control rod to slide to the left by pulling the control block, and then rotates the control block to drive the control rod and the limit rod to rotate, and then releases the control block. At this time, under the influence of the elasticity of the control spring, the sliding block slides on the surface of the positioning rod, thereby driving the positioning block to slide synchronously, so that the positioning block slides to the inner surface of the positioning groove, realizes the clamping and fixing, and positions the push rod. By providing a positioning component, the positioning operation of the push rod in the stopped state at any position is realized, so that the sealing plug is always located inside the circulation groove, avoiding gas circulation between the upper cavity and the lower cavity, so that the gas spring device always maintains the required length, and improves the stability of the gas spring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the external structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the cylinder body of the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the piston of the utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the connecting block of the utility model.

[0021] In the figure: 1-cylinder body, 2-piston rod, 3-retention mechanism, 31-piston assembly, 311-piston, 312-circulation groove, 313-top rod, 314-sealing block, 315-sealing plug, 32-positioning assembly, 321-connecting block, 322-positioning rod, 323-sliding block, 324-control rod, 325-limiting rod, 326-control block, 327-positioning block, 328-control spring, 329-limiting plate, 4-hole groove, 5-return spring, 6-positioning groove, 7-rod end joint, 8-tube end joint. DETAILED DESCRIPTION

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

[0023] See also Figure 1-4 , the utility model provides a technical solution:

[0024] A retention type gas spring includes a cylinder body 1, a piston rod 2 is slidably connected to the interior of the cylinder body 1, and a retention mechanism 3 is provided inside the cylinder body 1. The retention mechanism 3 includes:

[0025] The piston assembly 31 includes a piston 311 mounted at one end of the piston rod 2. The surface of the piston 311 is slidably connected to the interior of the cylinder 1. The surface of the piston 311 is provided with multiple sets of sealing rings, the surfaces of which are in contact with the inner wall of the cylinder 1. The interior of the piston 311 is provided with a flow groove 312. The interior of the piston 311 is slidably connected to a push rod 313. One end of the push rod 313 is fixedly connected to a sealing block 314. The bottom of the sealing block 314 is fixedly connected to a symmetrical sealing plug 315.

[0026] The positioning assembly 32 is provided at the other end of the piston rod 2 and is used to position the push rod 313 .

[0027] A sealing ring is also provided at the connection between the push rod 313 and the piston 311; the sealing plug 315 is an inverted conical block.

[0028] A hole slot 4 is formed inside the piston 311 , and a return spring 5 is fixedly connected to the top of the inner cavity of the hole slot 4 . One end of the return spring 5 is fixedly connected to the surface of the push rod 313 .

[0029] The return spring 5 ensures that the sealing plug 315 is always located inside the flow groove 312 without being affected by external forces.

[0030] The positioning assembly 32 includes a connecting block 321 installed at the other end of the piston rod 2, the inner wall of the connecting block 321 is fixedly connected to a symmetrical positioning rod 322, the surface of the positioning rod 322 is slidably connected to a sliding block 323, the left side of the sliding block 323 is rotatably connected to a control rod 324, the surface of the control rod 324 is fixedly connected to a limiting rod 325, one end of the control rod 324 is fixedly connected to a control block 326, the right side of the sliding block 323 is fixedly connected to a positioning block 327, the right side of the sliding block 323 is fixedly connected to a control spring 328, one end of the control spring 328 is fixedly connected to the inner wall of the connecting block 321, the inner wall of the connecting block 321 is fixedly connected to a limiting plate 329, and the inner part of the limiting plate 329 is snapped into the surface of the limiting rod 325.

[0031] The positioning rod 322 is used to limit the sliding of the sliding block 323. A limiting groove is provided inside the limiting plate 329. The limiting rod 325 is engaged with the inside of the limiting groove. The control spring 328 is controlled without being affected by external forces, so that the positioning block 327 is always engaged with the inside of the positioning groove 6.

[0032] The surface of the push rod 313 is slidably connected to the interior of the piston rod 2 , and the other end of the push rod 313 extends through to the outside of the connecting block 321 .

[0033] The top rod 313 passes through the connecting block 321 and is slidably connected to the inside of the connecting block 321 .

[0034] A positioning groove 6 is formed on the surface of the push rod 313 , and the inner surface of the positioning groove 6 is slidably connected to the surface of the positioning block 327 .

[0035] A rod end joint 7 is installed on the right side of the connecting block 321 , and a pipe end joint 8 is installed on the top end of the cylinder body 1 .

[0036] After the cam 314 is in the air, the gas in the air 2 is released, and the air in the air 2 is released, so that the air in the air 2 is released, and the air in the air 2 is released, so that the air in the air 2 is released, and the gas in the air 2 is released.

[0037] The retained gas spring drives the control rod 324 to slide to the left by pulling the control block 326. Then, the control block 326 is rotated to drive the control rod 324 and the limit rod 325 to rotate, and then the control block 326 is released. At this time, under the influence of the elasticity of the control spring 328, the sliding block 323 slides on the surface of the positioning rod 322, thereby driving the positioning block 327 to slide synchronously, so that the positioning block 327 slides to the inner surface of the positioning groove 6 to achieve card-connected fixation and position the push rod 313. By providing a positioning assembly 32, the positioning operation of the push rod 313 in a stopped state at any position is realized, so that the sealing plug 315 is always located inside the circulation groove 312, avoiding gas circulation between the upper cavity and the lower cavity, so that the gas spring device always maintains the required length, and improves the stability of the gas spring device.

[0038] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0039] When working, by pulling the piston rod 2, the piston 311 slides inside the cylinder 1. The sliding of the piston 311 will squeeze the gas in the lower chamber. At this time, the gas in the lower chamber will squeeze the sealing plug 315 through the circulation groove 312, thereby separating the sealing plug 315 from the circulation groove 312, causing the sealing block 314 and the push rod 313 to slide upward synchronously, so that the return spring 5 is compressed, and the gas in the lower chamber enters the upper chamber through the circulation groove 312. When the length of the piston rod 2 and the cylinder 1 is adjusted, the return spring 5 will start to reset, so that the sealing block 314 and the sealing plug 315 will re-seal the circulation groove 312 to prevent the circulation of gas and maintain the length retention, so that the piston rod 2 can stop at any position. At this time, if the cylinder 1 is subjected to downward pressure, the gas in the upper chamber will be compressed, thereby squeezing the seal. The sealing block 314 and the sealing plug 315 further maintain the sealing of the circulation groove 312, so that the length of the piston rod 2 will not change. At the same time, the piston rod 2 continues to be subjected to tension, causing the length to change. The control block 326 can be pulled to drive the control rod 324 to slide to the left. Then, the control block 326 is rotated to drive the control rod 324 and the limit rod 325 to rotate, and then the control block 326 is released. At this time, under the influence of the elasticity of the control spring 328, the sliding block 323 slides on the surface of the positioning rod 322, thereby driving the positioning block 327 to slide synchronously, so that the positioning block 327 slides to the inner surface of the positioning groove 6, achieving card-connected fixation, and positioning the push rod 313, so that the sealing plug 315 is always located inside the circulation groove 312, avoiding gas circulation between the upper cavity and the lower cavity, so that the piston rod 2 always maintains the required length.

[0040] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A retention type gas spring comprising a cylinder (1), wherein a piston rod (2) is slidably connected to the interior of the cylinder (1), characterized in that: A retention mechanism (3) is provided inside the cylinder (1), and the retention mechanism (3) comprises: The piston assembly (31) comprises a piston (311) mounted on one end of a piston rod (2), the surface of the piston (311) being slidably connected to the interior of the cylinder body (1), the surface of the piston (311) being provided with a plurality of sealing rings, the surfaces of the sealing rings being in contact with the inner wall of the cylinder body (1), a flow groove (312) being provided inside the piston (311), a push rod (313) being slidably connected to the interior of the piston (311), one end of the push rod (313) being fixedly connected to a sealing block (314), and the bottom of the sealing block (314) being fixedly connected to a symmetrical sealing plug (315); A positioning assembly (32) is provided at the other end of the piston rod (2) and is used to position the push rod (313).

2. A retention type gas spring according to claim 1, characterized in that: A hole groove (4) is provided inside the piston (311), a return spring (5) is fixedly connected to the top of the inner cavity of the hole groove (4), and one end of the return spring (5) is fixedly connected to the surface of the push rod (313).

3. The retention type gas spring according to claim 1, characterized in that: The positioning assembly (32) includes a connecting block (321) installed at the other end of the piston rod (2), the inner wall of the connecting block (321) is fixedly connected to a symmetrical positioning rod (322), the surface of the positioning rod (322) is slidably connected to a sliding block (323), the left side of the sliding block (323) is rotatably connected to a control rod (324), the surface of the control rod (324) is fixedly connected to a limiting rod (325), one end of the control rod (324) is fixedly connected to a control block (326), the right side of the sliding block (323) is fixedly connected to a positioning block (327), the right side of the sliding block (323) is fixedly connected to a control spring (328), one end of the control spring (328) is fixedly connected to the inner wall of the connecting block (321), the inner wall of the connecting block (321) is fixedly connected to a limiting plate (329), and the interior of the limiting plate (329) is engaged with the surface of the limiting rod (325).

4. A retention type gas spring according to claim 3, characterized in that: The surface of the push rod (313) is slidably connected to the inside of the piston rod (2), and the other end of the push rod (313) extends through to the outside of the connecting block (321).

5. The retention type gas spring according to claim 3, characterized in that: A positioning groove (6) is provided on the surface of the push rod (313), and the inner surface of the positioning groove (6) is slidably connected to the surface of the positioning block (327).

6. The retention type gas spring according to claim 3, characterized in that: A rod end joint (7) is installed on the right side of the connecting block (321), and a pipe end joint (8) is installed on the top end of the cylinder body (1).

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