Automatic oil injection device for damping oil cylinder

Abstract

This utility model discloses an automatic oil injection device for a damping cylinder, including a cylinder body, an oil cylinder body, an oil inlet pipe, and an oil return pipe. A connecting block is fixedly connected to the middle of the cylinder. A first groove is formed on one side of the connecting block, and a defoamer body is in contact with the first groove. Spring tubes are fixedly connected to both ends of the defoamer body. One end of the spring tube is in contact with a circular groove, and a connecting tube is fixedly connected to the circular groove. An oil guide hole is formed on the inner side of the connecting tube. A valve plate is rotatably connected to the oil guide hole through a rotating shaft. A torsion spring is sleeved on the rotating shaft. A limit ring is in contact with one side of the valve plate. This utility model can limit the defoamer body by setting a connecting block on one side of the cylinder body and using the first groove and the circular groove. Then, with the help of the limit plate, it can limit the defoamer body to the outside. The oil guide hole formed by the retractable spring tube communicates with the inside of the defoamer body, thereby achieving the effect of disassembling the defoamer body and improving the efficiency of regular maintenance.

Description

Technical Field

[0001] This utility model relates to the field of damping cylinder technology, specifically to an automatic oil injection device for damping cylinders. Background Technology

[0002] A damping cylinder is a device that combines starting and hydraulic characteristics. It uses compressed air to drive the piston of the pneumatic cylinder, which in turn drives the piston of the hydraulic cylinder. This causes the oil to flow through the throttle valve. The oil flow resistance is balanced with the cylinder driving force, allowing the piston to achieve smooth and adjustable linear motion.

[0003] According to Chinese Patent Publication No. CN208534890U, "A Pneumatic-Liquid Damping Cylinder," the main feature is the use of an air source as power. By utilizing the difference in the working area of ​​the adjusting needle valve, the hydraulic oil transmission volume is controlled in detail, resulting in smooth piston rod output and adjustable speed. Energy conversion is convenient, and the working environment is clean. Operational noise is low; the device is simple, easy to adjust, and easy to maintain and repair. A one-way valve controls the flow direction of the hydraulic oil, preventing oil backflow. A complete air-liquid isolation device ensures long-term trouble-free operation. The double-supported working piston ensures robust and precise guidance. The one-way valve structure in the cylinder cover effectively improves the operating efficiency of the hydraulic oil in the cylinder, allowing for rapid return stroke.

[0004] In common damping cylinders, air bubbles are generated in the oil reservoir and during pumping due to agitation, pressure changes, or oil aging and decomposition. This reduces the hydraulic oil's lifting modulus, affects the stability of damping characteristics, and increases noise. Therefore, defoamers are installed in the oil inlet line of the damping cylinder. However, defoamers can cause blockages. Moreover, since the defoamer is located inside the damping cylinder, disassembly and cleaning are inconvenient, affecting the efficiency of regular maintenance. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an automatic oil injection device for damping cylinders, which improves the convenience of maintaining the defoamer inside the damping cylinder and reduces the clogging problem of the defoamer.

[0006] The technical solution adopted by this utility model to solve the technical problem is: an automatic oil injection device for a damping cylinder, including a cylinder body, an oil cylinder body, an oil inlet pipe and an oil return pipe. A connecting block is fixedly connected to the middle of the cylinder body. A first groove is opened on one side of the connecting block. A defoamer body is in contact with the first groove. Spring tubes are fixedly connected to both ends of the defoamer body. One end of the spring tube is in contact with a circular groove. A connecting pipe is fixedly connected to the circular groove. An oil guide hole is opened on the inner side of the connecting pipe. A valve plate is rotatably connected to the oil guide hole through a rotating shaft. A torsion spring is sleeved on the rotating shaft. A limit ring is in contact with one side of the valve plate. The limit ring is fixedly connected to the connecting pipe. An oil inlet channel is opened on the side of the connecting block located at the oil guide hole. The oil inlet channel communicates with the piston side inside the cylinder body.

[0007] As a preferred technical solution of this utility model, a ring is fixedly connected to the outer side of the moving end of the spring tube, and a gasket is in contact with one side of the ring. The gasket is located in a circular groove. By setting the ring and the gasket, the sealing between the defoamer body and the spring tube is increased.

[0008] As a preferred technical solution of this utility model, a push block is fixedly connected to one side of the moving end of the spring tube. The push block corresponds to the valve plate. By setting the push block, the valve plate can be opened easily.

[0009] As a preferred technical solution of this utility model, a sliding rod is inserted into one side of the spring tube, and the sliding rod is slidably connected to a sliding groove. The sliding groove is located on both sides of the upper end of the connecting block. By setting the sliding rod and the sliding groove, the spring tube can be easily contracted.

[0010] As a preferred technical solution of this utility model, the connecting block has receiving grooves on both sides of the first groove, and a spring rod is inserted into the receiving groove. The spring rod is fixedly connected to a limiting plate in the first groove. The limiting plate is in contact with the defoamer body. By setting the spring rod and the limiting plate, the defoamer body can be limited.

[0011] As a preferred technical solution of this utility model, the connecting block is fixedly connected to a temporary limiting strip in the first groove. The temporary limiting strip corresponds to the limiting plate. By setting the temporary limiting strip, the defoamer body can be limited while facilitating disassembly.

[0012] This utility model has the following advantages: by setting a connecting block on one side of the cylinder body and using the first groove to cooperate with the circular groove, the defoamer body can be limited. Then, with the help of the limiting plate, it is limited to the outside of the defoamer body. The oil guide hole formed by the telescopic spring tube is connected to the inside of the defoamer body, thereby achieving the effect of disassembling the defoamer body and improving the efficiency of regular maintenance. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of an automatic oil injection device for a damping cylinder according to a preferred embodiment of the present invention;

[0014] Figure 2 This is a side sectional view of the connecting block of an automatic oil injection device for a damping cylinder according to a preferred embodiment of the present invention.

[0015] Figure 3 This is a side sectional view of the spring tube of an automatic oil injection device for a damping cylinder according to a preferred embodiment of the present invention.

[0016] Figure 4 This is a side sectional view of the ring sleeve structure of an automatic oil injection device for a damping cylinder according to a preferred embodiment of the present invention.

[0017] Explanation of reference numerals in the attached drawings: 1. Cylinder body; 2. Oil cylinder body; 3. Oil inlet pipe; 4. Oil return pipe; 5. Connecting block; 6. First groove; 7. Defoamer body; 8. Spring tube; 9. Circular groove; 10. Connecting pipe; 11. Oil guide hole; 12. Rotating shaft; 13. Valve plate; 14. Limiting ring; 15. Oil inlet channel; 16. Push block; 17. Gasket; 18. Ring sleeve; 19. Sliding groove; 20. Sliding rod; 21. Spring rod; 22. Limiting plate; 23. Temporary limiting strip; 24. Receiving groove. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Please refer to the following: Figure 1-3 The automatic oil injection device for a damping cylinder shown includes a cylinder body 1, a hydraulic cylinder body 2, an oil inlet pipe 3, and an oil return pipe 4. A connecting block 5 is fixedly connected to the middle of the cylinder body 1. A first groove 6 is formed on one side of the connecting block 5 to accommodate a defoamer body 7. The defoamer body 7 has a built-in stainless steel sintered filter element. The defoamer body 7 is in contact with the first groove 6. Spring tubes 8 are fixedly connected to both ends of the defoamer body 7. One end of the spring tube 8 is in contact with a circular groove 9. A connecting pipe 10 is fixedly connected to the circular groove 9. An oil guide hole 11 is provided inside the connecting pipe 10. A valve plate 13 is rotatably connected to the oil guide hole 11 via a rotating shaft 12. A torsion spring is sleeved on the rotating shaft 12. One side of the valve plate 13 contacts a limit ring 14. The limit ring 14 is fixedly connected inside the connecting pipe 10. An oil inlet channel 15 is provided on one side of the connecting block 5 located at the oil guide hole 11. The oil inlet channel 15 communicates with the piston side inside the cylinder body 1. When the spring tube 8 is inserted into the circular groove 9, it will squeeze the valve plate 13, causing the valve plate 13 to tilt, thereby allowing the defoamer body 7 to communicate with the oil guide hole 11.

[0020] Among them, a ring 18 is fixedly connected to the outer side of the moving end of the spring tube 8, and a gasket 17 is in contact with one side of the ring 18. The gasket 17 is located in the circular groove 9. By setting the ring 18 and the gasket 17, a shielding structure can be formed on the outer side of the spring tube 8, which can improve the sealing effect between the moving end of the spring tube 8 and the valve plate 13.

[0021] Among them, a push block 16 is fixedly connected to one side of the moving end of the spring tube 8. The push block 16 corresponds to the valve plate 13. By setting the push block 16, the gap between the valve plate 13 and the spring tube 8 can be increased when contacting the valve plate 13, thereby improving the flow guiding effect.

[0022] The spring tube 8 has a slide rod 20 inserted into one side (if it is necessary to pull the slide rod 20 stably, a protrusion can be set on the slide rod 20, and a limiting groove can be set in the slide groove 19. The limiting groove is a straight groove, which can facilitate pulling and limiting). The slide rod 20 is slidably connected to the slide groove 19. The slide groove 19 is located on both sides of the upper end of the connecting block 5. By setting the slide rod 20, the moving end of the spring tube 8 can be retracted by pulling, so as to facilitate pulling.

[0023] The connecting block 5 has receiving grooves 24 on both sides of the first groove 6. A spring rod 21 is inserted into the receiving groove 24. The spring rod 21 is fixedly connected to the limiting plate 22 in the first groove 6. The limiting plate 22 is in contact with the defoamer body 7. By setting the spring rod 21, when the limiting plate 22 contacts the inner walls of the two sides of the first groove 6, the sliding rod 20 can be pulled to cause the spring tube 8 to contract. When the spring on the spring rod 21 contracts, the spring enters the receiving groove 24, so that the limiting plate 22 is completely in contact with the inner walls of the two sides of the first groove 6.

[0024] The connecting block 5 is fixedly connected to the temporary limiting strip 23 in the first groove 6. The temporary limiting strip 23 corresponds to the limiting plate 22. By setting the temporary limiting strip 23, the defoamer body 7 can be limited. At the same time, a convex structure is set on one side of the spring rod 21, and a rubber pad is set on the other side of the convex structure. The rubber pad, together with the spring on the spring rod 21, can provide a stable limiting effect for the defoamer body 7.

[0025] Among them, the damping cylinder and the pneumatic-hydraulic damping cylinder are common types of equipment in the existing technology.

[0026] Working principle: When the cylinder body 1 extends, the oil in the cylinder body 2 enters the side of the cylinder 1 near the cylinder piston, and then the cylinder piston moves stably. During this process, the oil inlet pipe 3 provides oil, and then the oil enters the right oil guide hole 11 from the right oil inlet channel 15 in the figure, and enters the defoamer body 7. Then, from the left oil inlet channel 15 and the left oil guide hole 11 (passing through the throttle valve), it enters between the piston and the blocking structure in the cylinder, which plays a role in stabilizing the pushing of the cylinder piston. When the defoamer body 7 is blocked, the limiting plate 22 can be squeezed to both sides of the first groove 6, so that the limiting plate 22 contacts the two side walls of the first groove 6. At the same time, the slide rod 20 is pulled to cause the spring tube 8 to contract. At this time, the defoamer body 7 can be disassembled, and the valve plate 13 contacts the limiting ring 14 under no force, so as to prevent the oil from overflowing.

[0027] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

[0028] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An automatic oil injection device for a damping cylinder, comprising a cylinder body (1), a hydraulic cylinder body (2), an oil inlet pipe (3), and an oil return pipe (4), characterized in that, A connecting block (5) is fixedly connected to the middle of the cylinder body (1). A first groove (6) is provided on one side of the connecting block (5). A defoamer body (7) is in contact with the first groove (6). A spring tube (8) is fixedly connected to both ends of the defoamer body (7). A circular groove (9) is in contact with one end of the spring tube (8). A connecting pipe (10) is fixedly connected to the circular groove (9). An oil guide hole (11) is provided inside the connecting pipe (10). A valve plate (13) is rotatably connected to the oil guide hole (11) through a rotating shaft (12). A torsion spring is sleeved on the rotating shaft (12). A limit ring (14) is in contact with one side of the valve plate (13). The limit ring (14) is fixedly connected inside the connecting pipe (10). An oil inlet channel (15) is provided on one side of the connecting block (5) located at the oil guide hole (11). The oil inlet channel (15) is connected to the piston side inside the cylinder body (1).

2. The automatic oil injection device for a damping cylinder as described in claim 1, characterized in that, A ring (18) is fixedly connected to the outside of the moving end of the spring tube (8), and a gasket (17) is in contact with one side of the ring (18). The gasket (17) is located in the circular groove (9).

3. The automatic oil injection device for a damping cylinder as described in claim 2, characterized in that, A push block (16) is fixedly connected to one side of the moving end of the spring tube (8), and the push block (16) corresponds to the valve plate (13).

4. The automatic oil injection device for a damping cylinder as described in claim 3, characterized in that, A slide rod (20) is inserted into one side of the spring tube (8), and the slide rod (20) is slidably connected to a slide groove (19), which is located on both sides of the upper end of the connecting block (5).

5. The automatic oil injection device for a damping cylinder as described in claim 4, characterized in that, The connecting block (5) has receiving grooves (24) on both sides inside the first groove (6). A spring rod (21) is inserted into the receiving groove (24). The spring rod (21) is fixedly connected to a limiting plate (22) inside the first groove (6). The limiting plate (22) is in contact with the defoamer body (7).

6. The automatic oil injection device for a damping cylinder as described in claim 5, characterized in that, The connecting block (5) is fixedly connected to a temporary limiting strip (23) in the first groove (6), and the temporary limiting strip (23) corresponds to the limiting plate (22).

Images