Lockable pneumatic rod

Abstract

The utility model relates to the technical field of pneumatic rods, in particular to a lockable pneumatic rod which comprises a body, the body comprises a shell, a second through hole is formed in the upper surface of the shell, a self-locking mechanism is installed on the inner wall of the second through hole, and the self-locking mechanism comprises a second connecting block. The surface of the second connecting block is fixedly connected with the inner wall of the second through hole, the inner wall of the second through hole is fixedly connected with a spring, the tail end of the spring is provided with a sealing block, the lower surface of the sealing block is provided with a first connecting block, and the inner wall of the second through hole is movably connected with a limiting rod; the tail end of the limiting rod is attached to the right side surface of the sealing block. According to the utility model, the position can be self-locked, the air pressure in the device is ensured, and accidents are not easy to generate.

Description

Technical Field

[0001] The utility model relates to the field of pneumatic rods, in particular to a lockable pneumatic rod. Background Art

[0002] A gas spring is an industrial accessory that provides support, cushioning, braking, height adjustment, and angle adjustment. It consists of a pressure cylinder, piston rod, piston, sealing guide sleeve, filler (inert gas or oil-gas mixture), internal and external control elements (referring to controllable gas springs), and joints. The principle is to fill a sealed pressure cylinder with an inert gas or oil-gas mixture, raising the pressure within the chamber to several or even dozens of times higher than atmospheric pressure. The piston rod's smaller cross-sectional area than the piston's creates a pressure differential, which drives its movement. Gas springs are commonly used in office chairs and other similar furniture.

[0003] The common pneumatic rods on the market need to open and close the valve to lock during the locking process, so as to prevent the internal gas from leaking and ensure the stability of the internal air pressure. If the valve is forgotten to be closed, the pneumatic rod may move accidentally due to external force in the unlocked state, causing system instability and even causing safety accidents. Summary of the Invention

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to provide a lockable pneumatic rod.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a lockable pneumatic rod, comprising a main body, the main body comprising an outer shell, the upper surface of the outer shell being provided with a second through hole, the inner wall of the second through hole being provided with a self-locking mechanism, the self-locking mechanism comprising a second connecting block, the surface of the second connecting block being fixedly connected to the inner wall of the second through hole, the inner wall of the second through hole being fixedly connected with a spring, the end of the spring being provided with a sealing block, the lower surface of the sealing block being provided with a first connecting block, the inner wall of the second through hole being movably connected with a limiting rod, and the end of the limiting rod being in contact with the right side surface of the sealing block.

[0006] As a further description of the above technical solution:

[0007] A first through hole is provided on the surface of the shell, a limit block is installed on the inner wall of the first through hole, a protrusion is fixedly connected to the surface of the limit block, a first groove is provided on the inner wall of the first through hole, and the protrusion is located inside the first groove.

[0008] As a further description of the above technical solution:

[0009] A second groove is formed on the left side surface of the sealing block, an inner wall of the second groove is fixedly connected to the end of the spring, and a control rod is fixedly connected to the surface of the limiting rod.

[0010] As a further description of the above technical solution:

[0011] A telescopic mechanism is installed on the inner wall of the first through hole, and the telescopic mechanism includes a first piston. The surface of the first piston is movably connected to the inner wall of the first through hole. The left surface of the first piston is fixedly connected to a first elastic block, and the right surface of the first piston is fixedly connected to a second elastic block. The left surface of the first elastic block is fixedly connected to a telescopic rod, and the surface of the limit block is movably connected to the second piston, and the second piston is located on the right side of the first piston.

[0012] As a further description of the above technical solution:

[0013] An air intake mechanism is installed on the surface of the shell, and the air intake mechanism includes an air intake pipe. The end of the air intake pipe is fixedly connected to the surface of the shell. A convex ring is fixedly connected to the surface of the air intake pipe, and the end of the control rod extends to the inside of the air intake pipe.

[0014] As a further description of the above technical solution:

[0015] A connecting cover is installed on the right side surface of the shell, and a connecting mechanism is installed on the right side surface of the connecting cover. The connecting mechanism includes a fixing plate, the left side surface of the fixing plate is in contact with the right side surface of the connecting cover, a bolt is installed on the surface of the fixing plate, and a third through hole is opened on the surface of the fixing plate.

[0016] The utility model has the following beneficial effects:

[0017] 1. Compared with the prior art, this lockable pneumatic rod is connected to the surface of the air inlet pipe by means of a spring, a sealing block, a first connecting block and a second connecting block. When the telescopic rod needs to be extended, the air inlet pipe is used to pass gas into the interior of the shell. The gas in the air inlet pipe passes through the second through hole and contacts the sealing block, pushing the sealing block to move to the left. At this time, the spring is compressed, and the gas in the second through hole can enter the interior of the shell through the gap between the second connecting block and the first connecting block. When the telescopic rod is fixed in position, the pipe connected to the air inlet pipe no longer passes gas into the interior of the air inlet pipe. At this time, the interior of the shell The air pressure is greater than the external air pressure. The internal air pressure presses the sealing block to move to the right, and the spring also stretches to press the sealing block to move to the right, blocking the gap between the first connecting block and the second connecting block. At this time, the device is locked. Compared with conventional devices, the locking process requires opening and closing the valve to keep the internal gas from leaking and ensure the stability of the internal air pressure. Once the valve is forgotten to be closed, the pneumatic rod may move accidentally due to external force in the unlocked state, causing system instability and even causing safety accidents. The device can lock the position by itself to ensure the air pressure inside the device, which is not prone to accidents.

[0018] 2. Compared with the prior art, this lockable pneumatic rod is equipped with a connecting cover, a protrusion and a limit block. During use, the connecting cover is screwed, the connecting cover is unscrewed from the outer shell, and the limit block on the inner wall of the first through hole is taken out. The protrusion fixed on the surface of the limit block is installed inside the first groove to prevent the limit block from rotating. At this time, the first piston and other components inside the outer shell can be easily taken out for replacement or cleaning, which is convenient for disassembly and cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a lockable pneumatic rod proposed by the utility model from a first perspective;

[0020] Figure 2 This is a cross-sectional view of a lockable pneumatic rod proposed in the utility model;

[0021] Figure 3 The utility model provides a lockable pneumatic rod Figure 2 A magnified view of the structure at point A;

[0022] Figure 4 This is a second perspective overall structural diagram of a lockable pneumatic rod proposed by the utility model.

[0023] Legend:

[0024] 1. Main body; 101. Shell; 102. First through hole; 103. First groove; 104. Second through hole; 105. Connecting cover; 2. Self-locking mechanism; 201. Limit block; 202. Protrusion; 203. First connecting block; 204. Second connecting block; 205. Spring; 206. Sealing block; 207. Second groove; 208. Limit rod; 209. Control rod; 3. Telescopic mechanism; 301. Telescopic rod; 302. First elastic block; 303. First piston; 304. Second elastic block; 305. Second piston; 4. Intake mechanism; 401. Intake pipe; 402. Protruding ring; 5. Connecting mechanism; 501. Fixing plate; 502. Bolt; 503. Third through hole. DETAILED DESCRIPTION

[0025] Reference Figure 1-4 The utility model provides a lockable pneumatic rod: comprising a main body 1, the main body 1 comprises a shell 101, the upper surface of the shell 101 is provided with a second through hole 104, the inner wall of the second through hole 104 is installed with a self-locking mechanism 2, the self-locking mechanism 2 comprises a second connecting block 204, the surface of the second connecting block 204 is fixedly connected to the inner wall of the second through hole 104, the inner wall of the second through hole 104 is fixedly connected with a spring 205, the end of the spring 205 is installed with a sealing block 206, the lower surface of the sealing block 206 is installed with a first connecting block 203, the inner wall of the second through hole 104 is movably connected to a limiting rod 208, the end of the limiting rod 208 is in contact with the right side surface of the sealing block 206, after the pipe is connected to the surface of the air inlet pipe 401, when it is necessary to extend the telescopic rod 301, the telescopic rod 301 is used. The air inlet pipe 401 passes gas into the interior of the outer shell 101. The gas in the air inlet pipe 401 passes through the second through hole 104 and contacts the sealing block 206, pushing the sealing block 206 to move to the left. At this time, the spring 205 is compressed, and the gas in the second through hole 104 can enter the interior of the outer shell 101 through the gap between the second connecting block 204 and the first connecting block 203. When the telescopic rod 301 is fixed in position, the pipe connected to the air inlet pipe 401 no longer passes gas into the interior of the air inlet pipe 401. At this time, the air pressure inside the outer shell 101 is greater than the external air pressure. The internal air pressure presses the sealing block 206 to move to the right, and the spring 205 also stretches to press the sealing block 206 to move to the right, blocking the gap between the first connecting block 203 and the second connecting block 204. At this time, the device is locked.

[0026] The surface of the housing 101 is provided with a first through hole 102, the inner wall of the first through hole 102 is provided with a limit block 201, the surface of the limit block 201 is fixedly connected with a protrusion 202, the inner wall of the first through hole 102 is provided with a first groove 103, the protrusion 202 is located inside the first groove 103, the protrusion 202 fixed on the surface of the limit block 201 is installed inside the first groove 103 to prevent the limit block 201 from rotating, the left surface of the sealing block 206 is provided with a second groove 207, the inner wall of the second groove 207 is connected to the end of the spring 205 The control rod 209 is fixedly connected to the surface of the limit rod 208. When the control rod 209 is pulled to the left, the limit rod 208 fixed to the control rod 209 presses the third groove 207 to move to the left, which can release the self-locking. The inner wall of the first through hole 102 is installed with a telescopic mechanism 3. The telescopic mechanism 3 includes a first piston 303. The surface of the first piston 303 is movably connected to the inner wall of the first through hole 102. The left surface of the first piston 303 is fixedly connected to the first elastic block 302, and the right surface of the first piston 303 is fixedly connected to the second elastic block 3 04, the left surface of the first elastic block 302 is fixedly connected to the telescopic rod 301, the surface of the limit block 201 is movably connected to the second piston 305, the second piston 305 is located on the right side of the first piston 303, the surface of the shell 101 is installed with an air intake mechanism 4, the air intake mechanism 4 includes an air intake pipe 401, the end of the air intake pipe 401 is fixedly connected to the surface of the shell 101, the surface of the air intake pipe 401 is fixedly connected to a convex ring 402, the end of the control rod 209 extends to the interior of the air intake pipe 401, and the right surface of the shell 101 is installed with a connecting cover 10 5. Twist the connecting cover 105, unscrew the connecting cover 105 from the housing 101, and then take out the limit block 201 on the inner wall of the first through hole 102. At this time, the first piston 303 and other components inside the housing 101 can be easily taken out for replacement or cleaning. The right surface of the connecting cover 105 is equipped with a connecting mechanism 5, and the connecting mechanism 5 includes a fixing plate 501. The left surface of the fixing plate 501 is in contact with the right surface of the connecting cover 105. A bolt 502 is installed on the surface of the fixing plate 501, and a third through hole 503 is opened on the surface of the fixing plate 501.

[0027] Working principle: After connecting the pipe to the surface of the air inlet pipe 401, when it is necessary to extend the telescopic rod 301, the air inlet pipe 401 is used to pass gas into the interior of the housing 101. The gas in the air inlet pipe 401 passes through the second through hole 104 and contacts the sealing block 206, pushing the sealing block 206 to move to the left. At this time, the spring 205 is compressed, and the gas in the second through hole 104 can enter the interior of the housing 101 through the gap between the second connecting block 204 and the first connecting block 203. When the telescopic rod 301 is fixed in position, the pipe connected to the air inlet pipe 401 no longer passes gas into the interior of the air inlet pipe 401. At this time, the air pressure inside the housing 101 is high. Due to the external air pressure, the internal air pressure presses the sealing block 206 to move to the right, and the spring 205 also stretches to press the sealing block 206 to move to the right, blocking the gap between the first connecting block 203 and the second connecting block 204. At this time, the device is locked, and the connecting cover 105 is twisted and the connecting cover 105 is unscrewed from the outer shell 101. The limit block 201 on the inner wall of the first through hole 102 is taken out. The protrusion 202 fixed on the surface of the limit block 201 is installed inside the first groove 103 to prevent the limit block 201 from rotating. At this time, the first piston 303 and other components inside the outer shell 101 can be easily taken out for replacement or cleaning, which is convenient for disassembly and cleaning.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lockable pneumatic rod, comprising a main body (1), characterized in that: The main body (1) includes a shell (101), a second through hole (104) is provided on the upper surface of the shell (101), a self-locking mechanism (2) is installed on the inner wall of the second through hole (104), and the self-locking mechanism (2) includes a second connecting block (204), a surface of the second connecting block (204) is fixedly connected to the inner wall of the second through hole (104), a spring (205) is fixedly connected to the inner wall of the second through hole (104), a sealing block (206) is installed at the end of the spring (205), a first connecting block (203) is installed on the lower surface of the sealing block (206), and the inner wall of the second through hole (104) is movably connected to a limiting rod (208), and the end of the limiting rod (208) is in contact with the right side surface of the sealing block (206).

2. A lockable pneumatic lever according to claim 1, characterized in that: A first through hole (102) is provided on the surface of the housing (101), a limit block (201) is installed on the inner wall of the first through hole (102), a protrusion (202) is fixedly connected to the surface of the limit block (201), a first groove (103) is provided on the inner wall of the first through hole (102), and the protrusion (202) is located inside the first groove (103).

3. The lockable pneumatic lever according to claim 1, characterized in that: A second groove (207) is provided on the left side surface of the sealing block (206), the inner wall of the second groove (207) is fixedly connected to the end of the spring (205), and a control rod (209) is fixedly connected to the surface of the limiting rod (208).

4. The lockable pneumatic lever according to claim 2, characterized in that: A telescopic mechanism (3) is installed on the inner wall of the first through hole (102), and the telescopic mechanism (3) includes a first piston (303), the surface of the first piston (303) is movably connected to the inner wall of the first through hole (102), the left surface of the first piston (303) is fixedly connected to the first elastic block (302), the right surface of the first piston (303) is fixedly connected to the second elastic block (304), the left surface of the first elastic block (302) is fixedly connected to the telescopic rod (301), and the surface of the limit block (201) is movably connected to the second piston (305), and the second piston (305) is located on the right side of the first piston (303).

5. The lockable pneumatic lever according to claim 3, characterized in that: An air intake mechanism (4) is mounted on the surface of the housing (101), the air intake mechanism (4) comprising an air intake pipe (401), an end of the air intake pipe (401) being fixedly connected to the surface of the housing (101), a convex ring (402) being fixedly connected to the surface of the air intake pipe (401), and a distal end of the control rod (209) extending into the interior of the air intake pipe (401).

6. The lockable pneumatic lever according to claim 1, characterized in that: A connection cover (105) is installed on the right side surface of the housing (101), and a connection mechanism (5) is installed on the right side surface of the connection cover (105). The connection mechanism (5) comprises a fixing plate (501), the left side surface of the fixing plate (501) is in contact with the right side surface of the connection cover (105), a bolt (502) is installed on the surface of the fixing plate (501), and a third through hole (503) is provided on the surface of the fixing plate (501).

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