Double-switch pneumatic rod

Abstract

The utility model discloses a double-switch pneumatic rod which comprises a pneumatic body and an air supply assembly arranged on one side of the pneumatic body, two movable rods are arranged in the pneumatic body, a connecting plate is arranged on one sides of the two movable rods, and two limiting assemblies used for limiting the two movable rods are arranged on the connecting plate. A limiting block arranged at one end of a movable rod moves towards the interior of a limiting groove till a limiting plate completely enters the interior of the limiting groove, at the moment, the movable rod also completely enters the interior of a mounting groove, in the entering process of the movable rod, the limiting plate is extruded to move towards the interior of a connecting plate, and when the movable rod completely enters the mounting groove, the movable rod is driven to move towards the interior of the connecting plate. At the moment, a limiting plate pops up due to the acting force of a spring, pre-installation between a movable rod and a connecting plate is completed, then the movable rod and the connecting plate are further fixed through a bolt, and when the connecting plate and the movable rod are damaged, the connecting plate and the movable rod can be conveniently disassembled and maintained.

Description

Technical Field

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

[0002] Dual-switch pneumatic levers, commonly used in applications such as office furniture lifts, feature two switches, one above the other, each capable of controlling the lever's movement. This design not only provides ease of operation but also enhances comfort and efficiency through gentle movement.

[0003] In the existing double-switch pneumatic rod, it usually includes a cylinder body, a connecting plate, two movable rods and two sealing plugs. A three-pronged pipe is provided on one side of the cylinder body, and two valve switches are provided at the other end of the three-pronged pipe. The two sealing plugs are arranged inside the cylinder body. The two movable rods are fixedly connected to the two sealing plugs. Gas is injected into the interior of the cylinder body through the three-pronged pipe to push the two sealing plugs. The two movable rods are fixedly connected by a connecting plate. If the movable rod or the connecting plate is damaged or worn, since they are fixedly connected and cannot be disassembled, the entire assembly must be replaced together when replacing it, which increases the complexity and cost of maintenance. Summary of the Invention

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a double-switch pneumatic rod.

[0005] In order to achieve the above-mentioned object, the utility model adopts the following technical solution: a double-switch pneumatic rod, comprising a pneumatic body and an air supply assembly arranged on one side of the pneumatic body, two movable rods are arranged inside the pneumatic body, a connecting plate is provided on one side of the two movable rods, and two limit assemblies are provided on the connecting plate for limiting the two movable rods;

[0006] The limit assembly includes a limit block, a limit plate, a spring and a bolt, the connecting plate is provided with a mounting groove, one side of the movable rod is fitted with the inner bottom wall of the mounting groove, one end of the bolt extends into the interior of the mounting groove, and the end of the bolt close to the mounting groove extends into the interior of the movable rod, one side of the limit plate is fixedly connected to one end of the movable rod, and a limit groove is provided on the connecting plate for limiting the limit plate, the bottom of the limit block is fitted with the side of the movable rod close to the limit plate, the end of the limit block away from the movable rod is fixedly connected to one end of the spring, and the end of the spring away from the limit block is fixedly connected to the inner side wall of the connecting plate.

[0007] Preferably, the upper end of the limiting block is fixedly connected to a pushing block, a positioning groove is provided on the connecting plate, and one side of the pushing block extends into the positioning groove.

[0008] Preferably: the pneumatic body includes a cylinder body, a sealing plug, a connection group 1 and a connection group 2, one end of the two movable rods extends to the interior of the cylinder body, two sealing plugs are provided, the sides of the two movable rods close to the cylinder body are fixedly connected to one side of the two sealing plugs respectively, one side of the cylinder body is fixedly connected to a fork tube, and the side of the fork tube away from the cylinder body is connected to both the connection group 1 and the connection group 2.

[0009] Preferably, the connection group 1 includes a connection pipe 1 and a valve switch 1, and the valve switch 1 is fixedly connected to a stop of the fork pipe through the connection pipe 1.

[0010] Preferably: the connecting group 2 includes a connecting tube 2, a conduit 1, a conduit 2, a conduit 3 and a valve switch 2, one end of the connecting tube 2 is fixedly connected to one end of the fork tube, the end of the connecting tube 2 away from the fork tube is fixedly connected to one end of the conduit 1, the conduit 1 and the conduit 3 are both frustum-shaped, the conduit and the conduit 3 are arranged opposite to each other, the side of the conduit 1 with a larger diameter is connected to the conduit 2, the end of the conduit 2 away from the conduit 1 is fixedly connected to the conduit 2, and the end of the conduit 3 away from the conduit 2 is fixedly connected to the valve switch 2.

[0011] Preferably, a guide groove is provided on the outer side wall of the sealing plug, and a plurality of through holes are provided on a side of the sealing plug close to the movable rod, and the plurality of through holes are connected to the guide groove.

[0012] The utility model has the following beneficial effects:

[0013] When the movable rod is fully inserted into the installation groove, the limit plate will be squeezed to move toward the inside of the connecting plate, and when the movable rod is fully inserted into the installation groove, the limit plate will pop out due to the action of the spring, and the bottom of the limit plate will fit with the upper end of the movable rod, completing the pre-installation between the movable rod and the connecting plate. Subsequently, the movable rod and the connecting plate are further fixed by bolts, so that when damage occurs between the connecting plate and the movable rod, the connecting plate and the movable rod can be conveniently disassembled and maintained.

[0014] 2. When installing the movable rod and the connecting plate, pre-install the movable rod to ensure that the connecting plate is accurately positioned between the movable rods to avoid deviation during the installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a double-switch pneumatic rod proposed in the utility model;

[0016] Figure 2 This is a disassembled diagram of the pneumatic main body proposed in the utility model;

[0017] Figure 3 This is a schematic diagram of the limit assembly proposed in the utility model;

[0018] Figure 4 This is a cross-sectional view of the connecting plate proposed in the present invention.

[0019] Legend:

[0020] 1. Cylinder body; 2. Connecting plate; 3. Valve switch 2; 4. Valve switch 1; 5. Connecting pipe 1; 6. Conduit 3; 7. Conduit 2; 8. Conduit 1; 9. Connecting pipe 2; 10. Fork pipe; 11. Bolt; 12. Sealing plug; 13. Through hole; 14. Movable rod; 15. Push block; 16. Positioning slot; 17. Limit block; 18. Limit plate; 19. Spring. DETAILED DESCRIPTION

[0021] Reference Figure 1-4 The utility model provides a double-switch pneumatic rod, comprising a pneumatic body and an air supply assembly arranged on one side of the pneumatic body. Two movable rods 14 are arranged inside the pneumatic body, and a connecting plate 2 is arranged on one side of the two movable rods 14. Two limit assemblies for limiting the two movable rods 14 are arranged on the connecting plate 2.

[0022] The limiting assembly includes a limiting block 17, a limiting plate 18, a spring 19 and a bolt 11. A mounting groove is provided on the connecting plate 2. One side of the movable rod 14 fits with the inner bottom wall of the mounting groove. One end of the bolt 11 extends into the interior of the mounting groove. The end of the bolt 11 close to the mounting groove extends into the interior of the movable rod 14. One side of the limiting plate 18 is fixedly connected to one end of the movable rod 14. A limiting groove for limiting the limiting plate 18 is provided on the connecting plate 2. The bottom of the limiting block 17 fits with the side of the movable rod 14 close to the limiting plate 18. The end of the limiting block 17 away from the movable rod 14 is fixedly connected to one end of the spring 19. The end of the spring 19 away from the limiting block 17 is fixedly connected to the inner side wall of the connecting plate 2.

[0023] Specifically, by providing the limit plate 18, when the movable rod 14 is installed, the limit block 17 provided at one end of the movable rod 14 can be moved into the inner part of the limit groove. During this process, the movable rod 14 will continue to move into the inner part of the installation groove until the limit plate 18 is completely entered into the inner part of the limit groove, and at this time, the movable rod 14 will also be completely entered into the inner part of the installation groove. During the process of the movable rod 14 entering, the limit plate 18 will be squeezed to move into the inner part of the connecting plate 2. When the movable rod 14 is completely entered into the installation groove, the limit plate 18 will pop out due to the force of the spring 19, and the bottom of the limit plate 18 will fit with the upper end of the movable rod 14, completing the pre-installation between the movable rod 14 and the connecting plate 2. Subsequently, the movable rod 14 and the connecting plate 2 are further fixed by the bolts 11, so that when damage occurs between the connecting plate 2 and the movable rod 14, the connecting plate 2 and the movable rod 14 can be conveniently disassembled and maintained;

[0024] The upper end of the limit block 17 is fixedly connected to the push block 15, and a positioning groove 16 is provided on the connecting plate 2. One side of the push block 15 extends into the positioning groove 16. The setting of the push plate at this location is to more conveniently push the limit block 17;

[0025] The pneumatic body includes a cylinder body 1, a sealing plug 12, a connecting group 1 and a connecting group 2. One end of the two movable rods 14 extends to the interior of the cylinder body 1. Two sealing plugs 12 are provided. The two movable rods 14 are fixedly connected to one side of the two sealing plugs 12 on the side close to the cylinder body 1. A fork tube 10 is fixedly connected to one side of the cylinder body 1. The side of the fork tube 10 away from the cylinder body 1 is connected to both the connecting group 1 and the connecting group 2; the connecting group 1 includes a connecting tube 15 and a valve switch 4. The valve switch 4 is fixedly connected to the fork tube 10 through the connecting tube 5; the connecting group 2 includes a connecting tube 29, a conduit 18, a conduit 27, a conduit 36 ​​and a valve switch 23. One end of the connecting tube 29 is fixed to the fork tube 10. One end of the tube 10 is fixedly connected, and the end of the connecting tube 2 9 away from the fork tube 10 is fixedly connected to one end of the conduit 1 8. The conduit 1 8 and the conduit 3 6 are both truncated cone-shaped. The conduit and the conduit 3 6 are arranged opposite to each other. The side of the conduit 1 8 with a larger diameter is connected to the conduit 2 7. The end of the conduit 2 7 away from the conduit 1 8 is fixedly connected to the conduit 2 7. The end of the conduit 3 6 away from the conduit 2 7 is fixedly connected to the valve switch 2 3. The outer wall of the sealing plug 12 is provided with a guide groove. The side of the sealing plug 12 close to the movable rod 14 is provided with multiple through holes 13. The multiple through holes 13 are connected to the guide groove. The through holes 13 are provided to more conveniently add lubricating oil to the interior of the equipment to ensure the smooth operation of the equipment.

[0026] When the valve switch 14 is activated, the air flow will directly enter the interior of the cylinder 1 through the fork tube 10:

[0027] When valve switch 2 3 is activated, the airflow will first enter the guide pipe 2 through the guide pipe 3. In the process of the airflow passing through the guide pipe 2 and entering the guide pipe 1, since the side of the guide pipe 1 with a larger diameter is connected to the guide pipe 2 and the guide pipe 1 is in a frustum shape, the cross-section of the guide pipe 1 gradually decreases, and the speed of the airflow transmission will become faster, so the pressure inside the cylinder 1 changes more quickly, which helps to shorten the response time of the equipment:

[0028] When valve switch 1 4 and valve switch 2 3 are started at the same time: since two paths supply gas to cylinder 1 at the same time, the gas flow in cylinder 1 will increase, resulting in a faster rate of pressure change in cylinder 1. The rapid pressure change enables the system to adapt more flexibly to different working conditions and requirements.

[0029] Working principle: When the device is in use, by setting the limit plate 18, when the movable rod 14 is installed, the limit block 17 set at one end of the movable rod 14 can be moved into the inside of the limit slot. During this process, the movable rod 14 will continue to move into the inside of the installation slot until the limit plate 18 is completely inserted into the inside of the limit slot, and at this time the movable rod 14 will also completely enter the inside of the installation slot. During the process of the movable rod 14 entering, the limit plate 18 will be squeezed to move into the inside of the connecting plate 2. When the movable rod 14 is completely inserted into the installation slot, the limit plate 18 will pop out due to the action of the spring 19, and the bottom of the limit plate 18 will fit with the upper end of the movable rod 14, completing the pre-installation between the movable rod 14 and the connecting plate 2. Subsequently, the movable rod 14 and the connecting plate 2 are further fixed by the bolt 11, so that when damage occurs between the connecting plate 2 and the movable rod 14, the connecting plate 2 and the movable rod 14 can be conveniently disassembled and maintained.

[0030] 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 double-switch pneumatic lever, characterized in that: It comprises a pneumatic body and an air supply assembly arranged on one side of the pneumatic body, wherein two movable rods (14) are arranged inside the pneumatic body, a connecting plate (2) is arranged on one side of the two movable rods (14), and two limiting assemblies for limiting the two movable rods (14) are arranged on the connecting plate (2); The limiting assembly includes a limiting block (17), a limiting plate (18), a spring (19) and a bolt (11); a mounting groove is provided on the connecting plate (2); one side of the movable rod (14) is fitted with the inner bottom wall of the mounting groove; one end of the bolt (11) extends into the interior of the mounting groove; the end of the bolt (11) close to the mounting groove extends into the interior of the movable rod (14); one side of the limiting plate (18) is fixedly connected to one end of the movable rod (14); a limiting groove for limiting the limiting plate (18) is provided on the connecting plate (2); the bottom of the limiting block (17) is fitted with the side of the movable rod (14) close to the limiting plate (18); the end of the limiting block (17) away from the movable rod (14) is fixedly connected to one end of the spring (19); the end of the spring (19) away from the limiting block (17) is fixedly connected to the inner wall of the connecting plate (2).

2. The double-switch pneumatic lever according to claim 1, characterized in that: The upper end of the limit block (17) is fixedly connected to a push block (15), a positioning groove (16) is provided on the connecting plate (2), and one side of the push block (15) extends into the positioning groove (16).

3. The double-switch pneumatic lever according to claim 2, characterized in that: The pneumatic main body includes a cylinder body (1), a sealing plug (12), a connection group 1 and a connection group 2, one end of the two movable rods (14) extends into the interior of the cylinder body (1), two sealing plugs (12) are provided, and the sides of the two movable rods (14) close to the cylinder body (1) are fixedly connected to the sides of the two sealing plugs (12) respectively, one side of the cylinder body (1) is fixedly connected to a fork tube (10), and the side of the fork tube (10) away from the cylinder body (1) is connected to both the connection group 1 and the connection group 2.

4. The double-switch pneumatic lever according to claim 3, characterized in that: The connection group 1 includes a connection pipe 1 (5) and a valve switch 1 (4), and the valve switch 1 (4) is fixedly connected to the fork pipe (10) through the connection pipe 1 (5).

5. The double-switch pneumatic lever according to claim 4, characterized in that: The connection group 2 includes a connecting pipe 2 (9), a conduit 1 (8), a conduit 2 (7), a conduit 3 (6) and a valve switch 2 (3). One end of the connecting pipe 2 (9) is fixedly connected to one end of the fork pipe (10), and the end of the connecting pipe 2 (9) away from the fork pipe (10) is fixedly connected to one end of the conduit 1 (8). The conduit 1 (8) and the conduit 3 (6) are both truncated cone-shaped. The conduit and the conduit 3 (6) are arranged opposite to each other. The side of the conduit 1 (8) with a larger diameter is connected to the conduit 2 (7). The end of the conduit 2 (7) away from the conduit 1 (8) is fixedly connected to the conduit 2 (7), and the end of the conduit 3 (6) away from the conduit 2 (7) is fixedly connected to the valve switch 2 (3).

6. The double-switch pneumatic lever according to claim 5, characterized in that: A guide groove is provided on the outer side wall of the sealing plug (12), and a plurality of through holes (13) are provided on a side of the sealing plug (12) close to the movable rod (14), and the plurality of through holes (13) are communicated with the guide groove.

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