A pneumatic device structure

Abstract

The utility model provides a kind of pneumatic device structure, including cylinder barrel, lower end cover, upper end cover, piston rod, piston and spring;One end of cylinder barrel is connected with lower end cover, the other end of cylinder barrel is connected with upper end cover;Piston is arranged in cylinder barrel, and piston can move up and down in cylinder barrel;The space formed between cylinder barrel, lower end cover and piston is rod cavity, and the space formed between cylinder barrel, upper end cover and piston is rodless cavity;Spring is arranged in rodless cavity, and spring is located between piston and upper end cover, and the two end faces of spring are respectively in contact with piston and upper end cover;One end of piston rod penetrates lower end cover and is connected with piston;Rod cavity is connected with air compression device;Upper end cover is provided with through hole, and through hole penetrates upper end cover;The motion stability of air cylinder, reset reliability and overall durability can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of pneumatic device technology, and in particular to a pneumatic device structure. Background Technology

[0002] In traditional pneumatic devices, single-acting cylinders typically employ a spring-return structure, with the spring usually located in either the rod-side or rodless chamber. However, the existing spring arrangement has certain limitations: if a single spring is used in the rodless chamber, insufficient spring stiffness or concentrated force may lead to unstable return action and even accelerated cylinder wear. Furthermore, traditional spring-return structures are prone to fatigue failure under long-term high-frequency operating conditions, affecting the cylinder's service life. Utility Model Content

[0003] In view of the above problems, the purpose of this application is to provide a pneumatic device structure that can improve the motion stability, reset reliability and overall durability of the cylinder.

[0004] To achieve some or all of the above objectives or other objectives, this application provides the following technical solution: a pneumatic device structure, including a cylinder, a lower end cover, an upper end cover, a piston rod, a piston, and a spring; one end of the cylinder is connected to the lower end cover, and the other end of the cylinder is connected to the upper end cover; the piston is disposed inside the cylinder, and the piston is movably connected to the cylinder; the space formed between the cylinder, the lower end cover, and the piston is a rod-type cavity, and the space formed between the cylinder, the upper end cover, and the piston is a rodless cavity; a spring is disposed in the rodless cavity, one end of the spring is connected to the piston, and the other end of the spring is connected to the upper end cover; one end of the piston rod passes through the lower end cover and is connected to the piston; the rod-type cavity is connected to an air compression device; the upper end cover has a through hole, and the through hole penetrates the upper end cover.

[0005] Furthermore, it also includes a spring mandrel, which is disposed in the rodless cavity and fixedly connected to the piston. The height of the spring mandrel is less than the height of the rodless cavity, and the spring is sleeved on the spring mandrel.

[0006] Furthermore, there are six spring spindles, which are evenly arranged around the piston rod, and a spring is fitted on each spring spindle.

[0007] Furthermore, a silencer is provided on the through hole.

[0008] Furthermore, it also includes a filter pressure reducing valve and a solenoid valve, which are disposed on the outer surface of the cylinder barrel, and the air compression device is connected to the rod chamber through the filter pressure reducing valve and the solenoid valve.

[0009] Furthermore, a second silencer is provided on the solenoid valve.

[0010] Furthermore, it also includes a set screw; an annular boss is provided on the side of the piston near the lower end cover, the annular boss is sleeved on the piston rod, the annular boss is provided with a screw hole, the piston rod is provided with a groove, the screw hole and the groove are matched, and the set screw passes through the screw hole and is screwed into the groove.

[0011] Furthermore, a first sealing ring is provided between the piston rod and the piston, and a second sealing ring is provided between the annular boss and the piston.

[0012] Compared with existing technologies, the beneficial effects of this utility model are as follows: The pneumatic device in this application significantly improves cylinder performance by setting six springs in the rodless chamber. These six springs are evenly arranged around the piston rod circumferentially and work in conjunction with the spring spindle to limit displacement. This design makes the piston more evenly stressed and its movement smoother, effectively reducing uneven wear caused by single-point stress and extending the cylinder's service life. Simultaneously, the synergistic effect of multiple springs enhances the stability of the reset force, ensuring the piston can quickly and reliably return to its initial position, maintaining good performance even under frequent start-stop or high-load conditions. Furthermore, the welding and fixing method of the spring spindle further improves the structural rigidity, preventing spring misalignment or deformation, thereby enhancing the overall reliability and durability of the device. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a schematic diagram of the structure of this utility model; Figure 4 AA view; Figure 5 This is a partially enlarged schematic diagram of the connection between the annular boss and the piston rod. Figure 6 This is a schematic diagram of the gas-operated system. In the diagram: 1. Cylinder, 2. Lower end cover, 3. Upper end cover, 301. Through hole, 4. Piston rod, 401. Groove, 5. Piston, 6. Spring, 7. Rod chamber, 8. Rodless chamber, 9. Spring spindle, 10. No. 1 muffler, 11. Filter pressure reducing valve, 12. Solenoid valve, 13. No. 2 muffler, 14. No. 1 sealing ring, 15. No. 2 sealing ring, 16. Annular boss, 1601. Screw hole, 17. Set screw. Detailed Implementation

[0014] To make the structure and function of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0015] See appendix Figure 1-6 A pneumatic device structure includes a cylinder 1, a lower end cover 2, an upper end cover 3, a piston rod 4, a piston 5, and a spring 6. One end of the cylinder 1 is connected to the lower end cover 2, and the other end of the cylinder 1 is connected to the upper end cover 3. The piston 5 is disposed inside the cylinder 1 and can move up and down within the cylinder. The piston 5 is movably connected to the cylinder 1. The space formed between the cylinder 1, the lower end cover 2, and the piston 5 is a rod-type cavity 7, and the space formed between the cylinder 1, the upper end cover 3, and the piston 5 is a rodless cavity 8. The spring 6 is disposed in the rodless cavity 8, located between the piston and the upper end cover, with its two end faces contacting the piston and the upper end cover respectively. One end of the spring 6 is connected to the piston 5, and the other end of the spring 6 is connected to the upper end cover 3. One end of the piston rod 4 passes through the lower end cover 2 and is connected to the piston 5. The rod-type cavity 7 is connected to an air compression device. The upper end cover 3 has a through hole 301 that penetrates the upper end cover 3.

[0016] It also includes a spring spindle 9, which is disposed in the rodless cavity 8 and is fixedly connected to the piston 5. The height of the spring spindle 9 is less than the height of the rodless cavity 8, and the spring 6 is sleeved on the spring spindle 9.

[0017] There are six spring spindles 9, which are evenly arranged around the piston rod 4. Each spring spindle 9 is fitted with a spring 6. The six springs 6 are arranged around the piston rod 4, and the displacement of the springs 6 is limited by the spring spindles 9. The spring spindles 9 are welded to the piston 5, so that the piston 5 is subjected to uniform force and the piston 5 can move smoothly, which is conducive to the stable operation of the cylinder and reduces wear.

[0018] A silencer 10 is provided on the through hole 301; by installing a silencer on the pneumatic device, the noise during cylinder exhaust is reduced; the silencer of the rodless chamber 8 is installed at the top of the pneumatic device to reduce noise when air is discharged from the rodless chamber 8; the silencer of the rod chamber 7 is installed at the exhaust port of the solenoid valve 12 to reduce noise when air is discharged from the rod chamber 7.

[0019] It also includes a filter pressure reducing valve 11 and a solenoid valve 12, which are disposed on the outer surface of the cylinder 1. The air compression device is connected to the rod chamber 7 through the filter pressure reducing valve 11 and the solenoid valve 12. When the solenoid valve 12 is energized, the compressed air in the air compression device enters the rod chamber 7 through the filter pressure reducing valve 11 and the solenoid valve 12. When the solenoid valve 12 is de-energized, the solenoid valve 12 core reverses, and the air in the rod chamber 7 is discharged through the exhaust port of the solenoid valve 12. The filter pressure reducing valve 11 and the solenoid valve 12 are both mounted on the cylinder, thereby shortening the length of the air pipe and allowing the cylinder to respond to the action command in a timely manner. At the same time, this compact installation also greatly saves the space occupied by the pneumatic device.

[0020] The exhaust port of the solenoid valve 12 is equipped with a second silencer 13.

[0021] The filter pressure reducing valve 11 is made of 316L stainless steel, with a WPT1 / 2 threaded interface, a filtration accuracy of 5µm, and a gas source pressure of 0.55~0.86MPa. It includes a pressure gauge and mounting bracket, and is an integrated filter and pressure reducing unit. The solenoid valve 12 is a Class 1E solenoid valve, operating at 175~245VDC (rated 220VDC). The Class 1E solenoid valve should be equipped with a lead-out cable of at least 10 meters, meeting the requirements of low smoke, halogen-free, and flame retardant properties. The Class 1E solenoid valve should also be equipped with a Class 1E electrical connector, which should reliably connect to the Class 1E electrical connector on the lead-out cable. It is a Class I vibration resistant, two-position three-way valve, and single-electrically controlled.

[0022] In this embodiment, the filter pressure reducing valve 11 is model 8686APBK4QA00HS, and the solenoid valve 12 is model NTQX8316G0042D.

[0023] It also includes a set screw 17; an annular boss 16 is provided on the side of the piston 5 near the lower end cover 2, the annular boss 16 is sleeved on the piston rod 4, the annular boss 16 is provided with a screw hole 1601, and the piston rod 4 is provided with a groove 401, the screw hole 1601 and the groove 401 are matched, and the set screw 17 passes through the screw hole 1601 and is screwed into the groove 401; after the piston rod 4 is screwed into the piston 5, the anti-loosening design at the thread should be considered; this device uses a set screw 17 to prevent the piston rod 4 thread from loosening, the set screw 17 is screwed into the lower part of the piston 5, and during assembly, a groove 401 is drilled at the corresponding position of the piston rod 4 so that the set screw 17 is screwed into the groove 401, thereby preventing the piston rod 4 thread from loosening due to vibration or other reasons during use.

[0024] A first sealing ring 14 is provided between the piston rod 4 and the piston 5, and a second sealing ring 15 is provided between the annular boss 16 and the piston 5; the two sealing methods are adopted to more effectively isolate the rod chamber 7 and the rodless chamber 8 of the cylinder and reduce the risk of internal leakage of the cylinder.

[0025] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A pneumatic device structure, characterized in that: The device includes a cylinder, a lower end cover, an upper end cover, a piston rod, a piston, and a spring. One end of the cylinder is connected to the lower end cover, and the other end of the cylinder is connected to the upper end cover. The piston is disposed inside the cylinder and is movably connected to the cylinder. The space formed between the cylinder, the lower end cover, and the piston is a rod-type chamber, and the space formed between the cylinder, the upper end cover, and the piston is a rodless chamber. A spring is disposed in the rodless chamber, with one end of the spring connected to the piston and the other end of the spring connected to the upper end cover. One end of the piston rod passes through the lower end cover and is connected to the piston. The rod-type chamber is connected to an air compression device. The upper end cover has a through hole that penetrates the upper end cover.

2. The pneumatic device structure according to claim 1, characterized in that: It also includes a spring mandrel, which is disposed in the rodless cavity and fixedly connected to the piston. The height of the spring mandrel is less than the height of the rodless cavity, and the spring is sleeved on the spring mandrel.

3. The pneumatic device structure according to claim 2, characterized in that: There are six spring spindles, which are evenly arranged around the piston rod, and a spring is fitted on each spring spindle.

4. The pneumatic device structure according to claim 1, characterized in that: A silencer is installed on the through hole.

5. The pneumatic device structure according to claim 1, characterized in that: It also includes a filter pressure reducing valve and a solenoid valve, which are disposed on the outer surface of the cylinder. The air compression device is connected to the rod chamber through the filter pressure reducing valve and the solenoid valve.

6. The pneumatic device structure according to claim 5, characterized in that: The solenoid valve is equipped with a second silencer.

7. The pneumatic device structure according to claim 1, characterized in that: It also includes a set screw; an annular boss is provided on the side of the piston near the lower end cover, the annular boss is sleeved on the piston rod, the annular boss is provided with a screw hole, the piston rod is provided with a groove, the screw hole and the groove are matched, and the set screw passes through the screw hole and is screwed into the groove.

8. The pneumatic device structure according to claim 7, characterized in that: A first sealing ring is provided between the piston rod and the piston, and a second sealing ring is provided between the annular boss and the piston.

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