Pneumatic rod capable of automatically resetting

Abstract

The utility model relates to a pneumatic rod capable of resetting automatically, which comprises an outer shell, a piston rod is arranged in the outer shell, a push plate is fixedly connected outside the bottom section of the piston rod, an air inlet plate is fixedly connected below the push plate and in the outer shell, and an air inlet cavity is formed between the push plate and the air inlet plate. An L-shaped plate in driving connection through an air cylinder is arranged in the compressed air cavity, a hole matched with the L-shaped plate is formed in the center of the air inlet plate, one end of the L-shaped plate extends into the air inlet plate, the other end of the L-shaped plate is fixedly connected with the movable end of the air cylinder, and a fixing plate fixedly connected with the inner wall of the outer shell is arranged above the push plate and on the outer side of the piston rod. A reset spring is fixedly connected between the fixing plate and the push plate. The air cylinder is reasonable in structure, the air cylinder controls the L-shaped plate to open the hole in the air inlet plate, the piston rod can return to the initial position under the combined action of air pressure and the reset spring if no external pressure or tension exists, the height of the piston rod can be fixed by lightly pressing or pulling the piston rod to a proper height and closing the air cylinder, and the air cylinder is convenient to use.

Description

Technical Field

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

[0002] Pneumatic rods are a type of component that automatically raises and lowers without requiring a power source. They operate based on the thrust generated by changes in air pressure. These components are widely used in furniture, automobiles, machinery, medical equipment, and many other fields. Existing pneumatic rods often require manual reset after use, which is cumbersome, difficult to fully reset to their original position, and lacks precision. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings of the existing problems, the utility model provides a pneumatic rod that can automatically reset.

[0004] The technical solution adopted by the utility model to solve its technical problems is: an automatically reset pneumatic rod, comprising an outer shell, a piston rod is arranged in the outer shell, a push plate is fixedly connected to the outside of the bottom section of the piston rod, an air intake plate is fixedly connected below the push plate and inside the outer shell, an air intake cavity is formed between the push plate and the air intake plate, a compressed air cavity is formed between the air intake plate and the bottom plate of the outer shell, an L-shaped plate connected by a cylinder drive is arranged in the compressed air cavity, a hole is opened in the center of the air intake plate that fits the L-shaped plate, one end of the L-shaped plate extends into the air intake plate, and the other end is fixedly connected to the movable end of the cylinder, and the upper part of the push plate and the movable end are fixedly connected. The outside of the plug rod is provided with a fixing plate fixedly connected to the inner wall of the outer shell, and a return spring is fixedly connected between the fixing plate and the push plate. When in use, the cylinder drives the L-shaped plate to separate from the air intake plate, and the compressed gas flows from the hole into the air intake cavity until the air pressure in the air intake cavity and the compressed air cavity are consistent. The piston rod and the push plate are pushed upward by the air pressure. When no external force is applied, the piston rod is maintained in the middle of the outer shell under the action of air pressure and the return spring. The height of the piston rod can be fixed by lightly pulling or pressing the piston rod and then closing the cylinder. When reset is required, the cylinder is started again, and the piston rod returns to the middle of the outer shell to complete the automatic reset.

[0005] Preferably, a guide ring that fits with the piston rod is provided in the middle of the fixing plate to prevent the piston rod from deflecting during movement.

[0006] Preferably, a limiting sleeve is fixedly connected to the top of the outer shell, and limiting blocks are vertically arranged on both sides of the limiting sleeve. A limiting groove is provided on the side wall above the piston rod for use with the limiting block. The limiting block and the limiting groove prevent the piston rod from rotating during movement.

[0007] Preferably, a switch for controlling the cylinder is fixedly connected to the outside of the shell for easy use.

[0008] Preferably, a sealing gasket is fixedly connected to the joint between the L-shaped plate and the hole to prevent the gas in the intake cavity from flowing back through the gap between the hole and the L-shaped plate when the cylinder is closed.

[0009] Preferably, an air valve is provided in the end of the piston rod away from the outer shell, and a one-way valve is provided at the bottom of the piston rod. If there is a certain loss of compressed gas in the compression chamber and the air intake cavity, air can be replenished into the pneumatic rod through the air valve.

[0010] The beneficial effect of the present invention is that when in use, the cylinder controls the L-shaped plate to open the hole in the center of the air intake plate. If there is no external pressure or pulling force, the piston rod will return to its initial position under the combined action of air pressure and a return spring. The height of the piston rod can be fixed by lightly pressing or pulling the piston rod to a suitable height and then closing the cylinder. It is easy to use. In addition, if there is a certain loss of compressed gas in the compressed air cavity and the air intake cavity, air can be replenished to the inside of the pneumatic rod through the air valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 It is a cross-sectional view of the utility model;

[0013] Figure 2 yes Figure 1 Cross-sectional view in the AA direction;

[0014] Figure 3 It is a top view of the fixing plate of the utility model;

[0015] In the figure, 1. outer shell; 2. piston rod; 3. push plate; 4. air intake plate; 5. air intake cavity; 6. compression air cavity; 7. L-shaped plate; 8. cylinder; 9. fixing plate; 10. return spring; 11. guide ring; 12. limit sleeve; 13. limit block; 14. limit groove; 15. switch; 16. air valve; 17. one-way valve. DETAILED DESCRIPTION

[0016] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0017] Any feature disclosed in this specification (including any appended claims, abstract, and drawings), unless otherwise stated, may be replaced by other equivalent or similar features. In other words, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0018] like Figure 1-3The pneumatic rod with automatic reset shown in the figure includes an outer shell 1, a piston rod 2 is provided in the outer shell 1, a push plate 3 is fixedly connected to the outside of the bottom section of the piston rod 2, an air intake plate 4 is fixedly connected below the push plate 3 and inside the outer shell 1, an air intake cavity 5 is formed between the push plate 3 and the air intake plate 4, a compressed air cavity 6 is formed between the air intake plate 4 and the bottom plate of the outer shell 1, an L-shaped plate 7 connected by a cylinder 8 is provided in the compressed air cavity 6, a hole is opened in the center of the air intake plate 4 that fits with one end of the L-shaped plate 7, one end of the L-shaped plate 7 extends into the air intake plate 4, and the other end is fixedly connected to the movable end of the cylinder 8, a hole is provided above the push plate 3 and on the outside of the piston rod 2 that fits with the outer A fixing plate 9 is fixedly connected to the inner wall of the shell 1, and a return spring 10 is fixedly connected between the fixing plate 9 and the push plate 3. When in use, the cylinder drives the L-shaped plate 7 to separate from the air intake plate 4, and the compressed gas flows from the hole to the air intake cavity 5 until the air pressure in the air intake cavity 5 and the compressed air cavity 6 are consistent. The piston rod 2 and the push plate 3 are pushed upward by the air pressure. When no external force is applied, the piston rod 2 is maintained in the middle of the outer shell 1 under the action of the air pressure and the return spring 10. The height of the piston rod 2 can be fixed by lightly pulling or pressing the piston rod 2 and then closing the cylinder 8. When resetting is required, start the cylinder 8 again, and the piston rod 2 returns to the middle of the outer shell 1 to complete the automatic resetting work.

[0019] A guide ring 11 is provided in the middle of the fixing plate 9 and fits with the piston rod 2 to prevent the piston rod 2 from deflecting during movement.

[0020] The top of the outer shell 1 is fixedly connected to a limiting sleeve 12, and limiting blocks 13 are vertically arranged on both sides of the limiting sleeve 12. The upper side wall of the piston rod 2 is provided with a limiting groove 14 used in conjunction with the limiting block 13. The limiting block 13 and the limiting groove 14 prevent the piston rod 2 from rotating during movement.

[0021] A switch 15 for controlling the cylinder 8 is fixedly connected to the outside of the housing 1 for easy use.

[0022] A sealing gasket is fixedly connected to the joint between the L-shaped plate 7 and the hole, which prevents the gas in the air intake cavity 5 from flowing back through the gap between the hole and the L-shaped plate 7 when the cylinder 8 is closed.

[0023] An air valve 16 is provided in the end of the piston rod 2 away from the outer shell 1, and a one-way valve 17 is provided at the bottom of the piston rod 2. If there is a certain loss of compressed gas in the compression air cavity and the air intake cavity, air can be replenished into the pneumatic rod through the air valve 16. Specific embodiments

[0024] When in use, the cylinder drives the L-shaped plate 7 to separate from the air intake plate 7, and the compressed gas flows from the hole into the air intake cavity 5 until the air pressure in the air intake cavity 5 and the compressed air cavity 6 are consistent. The piston rod 2 and the push plate 3 are affected by the air pressure and move vertically in the direction of the limit groove 14. When no external force is applied, the piston rod 2 remains in the middle of the outer shell 1 under the action of air pressure and the return spring 10. By lightly pulling or pressing the piston rod 2 and then closing the cylinder 8, the cylinder 8 drives the L-shaped plate 7 to close the hole in the center of the air intake plate 4, so that the height of the piston rod 2 can be fixed. When resetting is required, press the switch 15, and the piston rod 2 returns to the middle of the outer shell 1, completing the automatic resetting work.

[0025] This design is ingenious. When in use, the cylinder controls the L-shaped plate to open the hole in the center of the air intake plate. If there is no external pressure or tension, the piston rod will return to its initial position under the combined action of air pressure and the return spring. The height of the piston rod can be fixed by lightly pressing or pulling the piston rod to a suitable height and then closing the cylinder. It is easy to use. In addition, if there is a certain loss of compressed gas in the compressed air cavity and the air intake cavity, air can be replenished to the inside of the pneumatic rod through the air valve.

[0026] The present invention is not limited to the aforementioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A pneumatic rod capable of automatic reset, characterized in that: The invention comprises an outer shell (1), wherein a piston rod (2) is provided in the outer shell (1), a push plate (3) is fixedly connected to the outside of the bottom section of the piston rod (2), an air intake plate (4) is fixedly connected below the push plate (3) and inside the outer shell (1), an air intake cavity (5) is formed between the push plate (3) and the air intake plate (4), a compression air cavity (6) is formed between the air intake plate (4) and the bottom plate of the outer shell (1), an L-shaped plate (7) connected by a cylinder (8) is provided in the compression air cavity (6), a hole is provided in the center of the air intake plate (4) and is matched with one end of the L-shaped plate (7), one end of the L-shaped plate (7) extends into the air intake plate (4), and the other end is fixedly connected to the movable end of the cylinder (8), a fixed plate (9) fixedly connected to the inner wall of the outer shell (1) is provided above the push plate (3) and outside the piston rod (2), and a return spring (10) is fixedly connected between the fixed plate (9) and the push plate (3).

2. The automatically resettable pneumatic rod according to claim 1, characterized in that: A guide ring (11) is provided in the middle of the fixing plate (9) and is fitted with the piston rod (2).

3. The automatically resettable pneumatic rod according to claim 1, characterized in that: The top of the outer shell (1) is fixedly connected to a limiting sleeve (12), and limiting blocks (13) are vertically arranged on both sides of the limiting sleeve (12). The upper side wall of the piston rod (2) is provided with a limiting groove (14) used in conjunction with the limiting blocks (13).

4. The automatically resettable pneumatic rod according to claim 1, characterized in that: A switch (15) for controlling the cylinder (8) is fixedly connected to the outside of the housing (1).

5. The automatically resettable pneumatic rod according to claim 1, characterized in that: A sealing gasket is fixedly connected to the L-shaped plate (7) at the location where it contacts the hole.

6. The automatically resettable pneumatic rod according to claim 1, characterized in that: An air valve (16) is provided in one end of the piston rod (2) away from the outer shell (1), and a one-way valve (17) is provided at the bottom of the piston rod (2).

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