Hydraulic oil cylinder sealing device

Abstract

The utility model relates to the technical field of hydraulic oil cylinder sealing, in particular to a hydraulic oil cylinder sealing device which can effectively improve the sealing performance of a hydraulic oil cylinder, enhance the sealing effect and improve the practicability. Comprising a cylinder body, a piston disc is movably installed in the cylinder body, a piston rod is fixedly connected to the top end of the piston disc, a guide sleeve is integrally arranged at the bottom end of a sealing table, a butt-joint disc is integrally arranged at the top end of the cylinder body, a sealing sinking groove is formed in the top end of the butt-joint disc, an inner sealing gasket is arranged at the bottom end of the sealing sinking groove, and an outer sealing gasket is arranged at the top end of the butt-joint disc. Two sets of annular sealing grooves are formed in the outer wall of the guide sleeve, sealing rubber rings are clamped in the two sets of annular sealing grooves in a sleeved mode, the outer walls of the sealing rubber rings tightly abut against the inner wall of the cylinder body, two sets of inner O-shaped sealing rings are arranged on the outer wall of the piston disc in a sleeved mode, and the piston disc is movably installed in the cylinder body through matching of the inner O-shaped sealing rings and the inner wall of the cylinder body. The piston rod penetrates through the guide hole in a sliding mode through matching with the outer O-shaped sealing ring.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinder sealing, in particular to a hydraulic cylinder sealing device. Background Technique

[0002] Hydraulic cylinder sealing devices are widely used in industrial automation production. The hydraulic cylinder sealing device converts the pressure of the liquid in the cylinder body into the mechanical energy of the linear reciprocating motion of the executing component. In the existing hydraulic cylinder sealing device system, a guiding structure is generally arranged between the piston rod and the cylinder body of the hydraulic cylinder sealing device to guide and support the piston rod.

[0003] In the prior art, the utility model patent with the patent publication number of CN213088752U discloses a hydraulic cylinder sealing device, which adopts a two-stage sealing structure. Dust isolation is carried out through the first sealing part, which can effectively reduce the invasion and deposition of particulate matter, and this structure is easy to maintain and replace, improving the dust isolation effect. The piston rod is supported and guided through the second sealing part, and the wear resistance is improved by relying on the combination of the metal sleeve and the nylon sleeve ring, so that the working stability and service life of the hydraulic cylinder are both improved.

[0004] However, in the above patent, the structure of the sealing part is relatively simple, so the sealing performance of the hydraulic cylinder is relatively poor, affecting the sealing effect of the device and lacking practicality. Summary of the Utility Model

[0005] To solve the above technical problems, the utility model provides a hydraulic cylinder sealing device that can effectively improve the sealing performance of the hydraulic cylinder, enhance the sealing effect, and improve the practicality.

[0006] Technical Solution

[0007] To achieve the above object, the present utility model provides the following technical solutions: A hydraulic cylinder sealing device includes a cylinder body and a sealing mechanism. A piston disk is movably installed inside the cylinder body, and a piston rod is fixedly connected to the top end of the piston disk. The sealing mechanism includes a guide sleeve connecting seat. A sealing table is integrally and fixedly provided at the bottom end of the guide sleeve connecting seat. A guide sleeve is integrally provided at the bottom end of the sealing table. A docking disk is integrally provided at the top end of the cylinder body. A sealing sink is provided at the top end of the docking disk. An inner sealing pad is provided at the bottom end of the sealing sink. An outer sealing pad is provided at the top end of the docking disk. The guide sleeve connecting seat is buckled on the docking disk through the cooperation of the sealing table and the sealing sink. Four groups of socket head cap screws are spirally installed in a circular array on the guide sleeve connecting seat. Four groups of threaded holes are provided at the top end of the docking disk for cooperating with the socket head cap screws. The four groups of socket head cap screws are respectively spirally installed in the four groups of threaded holes. And the bottom end of the guide sleeve connecting seat tightly abuts against the top end of the outer sealing pad, and the bottom end of the sealing table tightly abuts against the top end of the inner sealing pad. Two groups of annular sealing grooves are provided on the outer wall of the guide sleeve. Sealing rubber rings are sleeved and clamped in both of the two groups of annular sealing grooves. The outer wall of the sealing rubber ring tightly abuts against the inner wall of the cylinder body. A guide hole is provided through the guide sleeve connecting seat, the sealing table and the guide sleeve. Two groups of inner O-ring seals are sleeved on the outer wall of the piston disk. The piston disk is movably installed inside the cylinder body through the cooperation of the inner O-ring seals and the inner wall of the cylinder body. The piston rod slides through the guide hole through the cooperation with the outer O-ring seal.

[0008] Preferably, a collecting mechanism for collecting oil leakage is provided at the top end of the guide sleeve connecting seat. The collecting mechanism includes a collecting shell. The collecting shell is fixedly installed at the top end of the guide sleeve connecting seat. A sliding hole communicating with the guide hole is provided on the collecting shell. Sealing rings are fixedly provided in the sliding holes at the upper and lower ends of the collecting shell. The piston rod slides through the sliding hole through the cooperation with the sealing rings. A drain pipe is fixedly communicated with one side of the outer wall of the collecting shell. An oil cap is spirally installed and covered on the drain pipe.

[0009] Preferably, a buffer rubber pad is fixedly connected to the top end of the piston disk, and the buffer rubber pad is sleeved on the piston rod.

[0010] Preferably, an annular conical table is provided on the inner side of the bottom of the collecting shell.

[0011] Preferably, four groups of counterbores are provided on the guide sleeve connecting seat for matching with the socket head cap screws.

[0012] Preferably, anti-slip lines are provided on the outer wall of the oil cap.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: When in use, the guide sleeve connecting seat is fixedly installed on the cylinder block through hexagon socket head cap screws, so that the sealing table sinks into the sealing sink. Through the cooperation of the inner sealing gasket and the outer sealing gasket, the sealing performance between the guide sleeve connecting seat and the sealing table and the cylinder block can be enhanced. Through the cooperation of the sealing rubber ring and the annular sealing groove, the sealing performance between the guide sleeve and the cylinder block can be enhanced. During the movement of the piston disk and the piston rod, through the inner O-ring, the sealing performance between the piston disk and the inner wall of the cylinder block can be enhanced. Through the outer O-ring, the sealing performance between the piston rod and the inner wall of the guide sleeve can be enhanced. The inner sealing gasket, the outer sealing gasket and the sealing rubber ring constitute three seals between the guide sleeve connecting seat and the cylinder block. The inner O-ring and the outer O-ring constitute two seals inside. Through these five seals, the sealing performance of the hydraulic cylinder can be effectively improved, the sealing effect can be enhanced, and the practicability can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is an axonometric structural schematic diagram of the present utility model;

[0015] Figure 2 is an axonometric sectional structural schematic diagram of the present utility model;

[0016] Figure 3 is a partial axonometric sectional structural schematic diagram of the present utility model;

[0017] Figure 4 is an axonometric structural schematic diagram of the piston disk and the piston rod in the present utility model;

[0018] Figure 5 is an axonometric sectional structural schematic diagram of the cylinder block in the present utility model;

[0019] Reference numerals in the drawings: 1, cylinder block; 2, guide sleeve connecting seat; 3, sealing table; 4, guide sleeve; 5, docking plate; 6, sealing sink; 7, inner sealing gasket; 8, outer sealing gasket; 9, hexagon socket head cap screw; 10, threaded hole; 11, sealing rubber ring; 12, annular sealing groove; 13, piston disk; 14, piston rod; 15, guide hole; 16, inner O-ring; 17, outer O-ring; 18, collecting shell; 19, sealing ring; 20, drain pipe; 21, oil cap; 22, buffer rubber pad; 23, frustum; 24, counterbore. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0021] Embodiment 1

[0022] Please refer to Figures 1 - 5, A hydraulic cylinder sealing device of the present utility model includes a cylinder block 1. A piston disk 13 is movably installed inside the cylinder block 1. A piston rod 14 is fixedly connected to the top end of the piston disk 13. A sealing table 3 is integrally and fixedly provided at the bottom end of the guide sleeve connection seat 2. A guide sleeve 4 is integrally provided at the bottom end of the sealing table 3. A docking disk 5 is integrally provided at the top end of the cylinder block 1. A sealing sunk groove 6 is provided at the top end of the docking disk 5. An inner sealing gasket 7 is provided at the bottom end of the sealing sunk groove 6. An outer sealing gasket 8 is provided at the top end of the docking disk 5. The guide sleeve connection seat 2 is buckled on the docking disk 5 through the cooperation of the sealing table 3 and the sealing sunk groove 6. Four groups of socket head cap screws 9 are screwed in an annular array on the guide sleeve connection seat 2. Four groups of threaded holes 10 are provided at the top end of the docking disk 5 for cooperating with the socket head cap screws 9. The four groups of socket head cap screws 9 are respectively screwed in the four groups of threaded holes 10. And the bottom end of the guide sleeve connection seat 2 tightly abuts against the top end of the outer sealing gasket 8, and the bottom end of the sealing table 3 tightly abuts against the top end of the inner sealing gasket 7. Two annular sealing grooves 12 are provided on the outer wall of the guide sleeve 4. Sealing rubber rings 11 are sleeved and clamped in both of the two annular sealing grooves 12. The outer wall of the sealing rubber ring 11 tightly abuts against the inner wall of the cylinder block 1. A guide hole 15 is provided through the guide sleeve connection seat 2, the sealing table 3 and the guide sleeve 4. Two inner O-ring seals 16 are sleeved on the outer wall of the piston disk 13. The piston disk 13 is movably installed inside the cylinder block 1 through the cooperation of the inner O-ring seals 16 and the inner wall of the cylinder block 1. The piston rod 14 slides through the guide hole 15 through the cooperation with the outer O-ring seal 17; When in use, the guide sleeve connection seat 2 is fixedly installed on the cylinder block 1 through the socket head cap screws 9, so that the sealing table 3 sinks into the sealing sunk groove 6. Through the cooperation of the inner sealing gasket 7 and the outer sealing gasket 8, the sealing performance between the guide sleeve connection seat 2 and the sealing table 3 and the cylinder block 1 can be enhanced. Through the cooperation of the sealing rubber ring 11 and the annular sealing groove 12, the sealing performance between the guide sleeve 4 and the cylinder block 1 can be enhanced. During the movement of the piston disk 13 and the piston rod 14, through the inner O-ring seals 16, the sealing performance between the piston disk 13 and the inner wall of the cylinder block 1 can be enhanced. Through the outer O-ring seal 17, the sealing performance between the piston rod 14 and the inner wall of the guide sleeve 4 can be enhanced. Three seals between the guide sleeve connection seat 2 and the cylinder block 1 are formed by the inner sealing gasket 7, the outer sealing gasket 8 and the sealing rubber ring 11. Two seals inside are formed by the inner O-ring seals 16 and the outer O-ring seals 17. Through these five seals, the sealing performance of the hydraulic cylinder can be effectively improved, the sealing effect can be enhanced, and the practicability can be improved.

[0023] Embodiment 1

[0024] Please refer to Figures 1 - 5, A hydraulic cylinder sealing device of the present utility model includes a cylinder block 1. A piston disc 13 is movably installed inside the cylinder block 1. A piston rod 14 is fixedly connected to the top end of the piston disc 13. A sealing table 3 is integrally and fixedly provided at the bottom end of the guide sleeve connecting seat 2. A guide sleeve 4 is integrally provided at the bottom end of the sealing table 3. A docking disc 5 is integrally provided at the top end of the cylinder block 1. A sealing sink 6 is provided at the top end of the docking disc 5. An inner sealing gasket 7 is provided at the bottom end of the sealing sink 6. An outer sealing gasket 8 is provided at the top end of the docking disc 5. The guide sleeve connecting seat 2 is buckled on the docking disc 5 through the cooperation of the sealing table 3 and the sealing sink 6. Four groups of hexagon socket head cap screws 9 are screwed in an annular array on the guide sleeve connecting seat 2. Four groups of threaded holes 10 are provided on the top end of the docking disc 5 for cooperating with the hexagon socket head cap screws 9. The four groups of hexagon socket head cap screws 9 are respectively screwed in the four groups of threaded holes 10. And the bottom end of the guide sleeve connecting seat 2 tightly abuts against the top end of the outer sealing gasket 8, and the bottom end of the sealing table 3 tightly abuts against the top end of the inner sealing gasket 7. Two annular sealing grooves 12 are provided on the outer wall of the guide sleeve 4. Sealing rubber rings 11 are sleeved and clamped in both of the two annular sealing grooves 12. The outer wall of the sealing rubber ring 11 tightly abuts against the inner wall of the cylinder block 1. A guide hole 15 is provided through the guide sleeve connecting seat 2, the sealing table 3 and the guide sleeve 4. Two inner O-ring seals 16 are sleeved on the outer wall of the piston disc 13. The piston disc 13 is movably installed inside the cylinder block 1 through the cooperation of the inner O-ring seals 16 and the inner wall of the cylinder block 1. The piston rod 14 slides through the guide hole 15 through the cooperation with the outer O-ring seal 17. A collecting shell 18 is fixedly installed at the top end of the guide sleeve connecting seat 2. A sliding hole communicating with the guide hole 15 is provided on the collecting shell 18. Sealing rings 19 are fixedly provided in the sliding holes at the upper and lower ends of the collecting shell 18. The piston rod 14 slides through the sliding hole through the cooperation with the sealing rings 19. A drain pipe 20 is fixedly communicated with one side of the outer wall of the collecting shell 18. An oil cap 21 is screwed on the drain pipe 20; when in use, the guide sleeve connecting seat 2 is fixedly installed on the cylinder block 1 through the hexagon socket head cap screws 9, so that the sealing table 3 sinks into the sealing sink 6. Through the cooperation of the inner sealing gasket 7 and the outer sealing gasket 8, the sealing performance between the guide sleeve connecting seat 2 and the sealing table 3 and the cylinder block 1 can be enhanced. Through the cooperation of the sealing rubber ring 11 and the annular sealing groove 12, the sealing performance between the guide sleeve 4 and the cylinder block 1 can be enhanced. During the movement of the piston disc 13 and the piston rod 14, through the inner O-ring seals 16, the sealing performance between the piston disc 13 and the inner wall of the cylinder block 1 can be enhanced. Through the outer O-ring seal 17, the sealing performance between the piston rod 14 and the inner wall of the guide sleeve 4 can be enhanced. Three seals between the guide sleeve connecting seat 2 and the cylinder block 1 are formed by the inner sealing gasket 7, the outer sealing gasket 8 and the sealing rubber ring 11. Two seals inside are formed by the inner O-ring seals 16 and the outer O-ring seals 17. Through these five seals, the sealing performance of the hydraulic cylinder can be effectively improved, the sealing effect can be enhanced, and the practicability can be improved.

[0025] The top of the guide sleeve connecting seat 2 is provided with a collecting mechanism for collecting oil leakage. The collecting mechanism includes a collecting shell 18 which is fixedly installed on the top of the guide sleeve connecting seat 2. The collecting shell 18 is provided with a sliding hole communicated with the guide hole 15. Sealing rings 19 are fixedly arranged in the sliding holes at the upper and lower ends of the collecting shell 18. The piston rod 14 slides through the sliding hole by cooperating with the sealing ring 19. A drain pipe 20 is fixedly communicated with one side of the outer wall of the collecting shell 18, and an oil cap 21 is screwed on the drain pipe 20. During the long-term movement of the piston rod 14, if oil leakage accidentally occurs, the oil fluid brought out by the piston rod 14 is scraped by the sealing ring 19 and falls into the collecting shell 18 for collection. By unscrewing the oil cap 21, the collected oil fluid can be discharged through the drain pipe 20, so that when oil leakage occurs, the oil fluid can be prevented from flowing onto the surface of the cylinder block.

[0026] A buffer rubber pad 22 is fixedly connected to the top of the piston disc 13, and the buffer rubber pad 22 is sleeved on the piston rod 14. By arranging the buffer rubber pad 22, during the movement of the piston disc 13, the piston disc 13 can be prevented from directly colliding with the bottom of the guide sleeve 4, playing a buffering role.

[0027] An annular frustum 23 is arranged on the inner side of the bottom of the collecting shell 18. By arranging the annular frustum 23, the leaked oil fluid can be more easily discharged from the collecting shell 18, playing a guiding role.

[0028] Four sets of counterbores 24 are provided on the guide sleeve connecting seat 2 and are matched with the socket head cap screws 9. By arranging the counterbores 24, after the socket head cap screws 9 are tightened, the tops of the socket head cap screws 9 can sink into the counterbores 24, preventing the tops of the socket head cap screws 9 from protruding, so that the installation is more beautiful.

[0029] Anti-slip lines are arranged on the outer wall of the oil cap 21. By arranging the anti-slip lines, the oil cap 21 can be more convenient to screw and is not easy to slip.

[0030] A hydraulic cylinder sealing device of the present utility model and its working principle. When in use, the guide sleeve connecting seat 2 is fixedly installed on the cylinder block 1 through the hexagon socket head cap screw 9, so that the sealing table 3 sinks into the sealing sink 6. The cooperation of the inner sealing gasket 7 and the outer sealing gasket 8 can enhance the sealing performance between the guide sleeve connecting seat 2 and the sealing table 3 and the cylinder block 1. The cooperation of the sealing rubber ring 11 and the annular sealing groove 12 can enhance the sealing performance between the guide sleeve 4 and the cylinder block 1. During the movement of the piston disc 13 and the piston rod 14, the inner O-ring 16 can enhance the sealing performance between the piston disc 13 and the inner wall of the cylinder block 1, and the outer O-ring 17 can enhance the sealing performance between the piston rod 14 and the inner wall of the guide sleeve 4. The inner sealing gasket 7, the outer sealing gasket 8 and the sealing rubber ring 11 constitute three seals between the guide sleeve connecting seat 2 and the cylinder block 1, and the inner O-ring 16 and the outer O-ring 17 constitute two seals inside. Through these five seals, the sealing performance of the hydraulic cylinder can be effectively improved and the sealing effect can be enhanced. During the long-term movement of the piston rod 14, if oil leakage accidentally occurs, the oil fluid carried out by the piston rod 14 is swept by the sealing ring 19 and falls into the collection shell 18 for collection. By unscrewing the oil cap 21, the collected oil fluid can be discharged through the drain pipe 20, so as to avoid the oil fluid flowing to the surface of the cylinder block when oil leakage occurs.

[0031] The installation method, connection method or setting method of a hydraulic cylinder sealing device of the present utility model are all common mechanical methods, and any method that can achieve its beneficial effects can be implemented.

[0032] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A hydraulic cylinder sealing device, comprising a cylinder block (1), inside which a piston disc (13) is movably installed, and a piston rod (14) is fixedly connected to the top end of the piston disc (13), characterized in that, It further includes a sealing mechanism; Sealing mechanism, the sealing mechanism includes a guide sleeve connecting seat (2), a sealing table (3) is integrally and fixedly provided at the bottom end of the guide sleeve connecting seat (2), a guide sleeve (4) is integrally provided at the bottom end of the sealing table (3), a docking plate (5) is integrally provided at the top end of the cylinder block (1), a sealing sink (6) is provided at the top end of the docking plate (5), an inner sealing gasket (7) is provided at the bottom end of the sealing sink (6), an outer sealing gasket (8) is provided at the top end of the docking plate (5), the guide sleeve connecting seat (2) is buckled on the docking plate (5) through the cooperation of the sealing table (3) and the sealing sink (6), four groups of socket head cap screws (9) are screwed in a circular array on the guide sleeve connecting seat (2), four groups of threaded holes (10) are provided at the top end of the docking plate (5) for cooperating with the socket head cap screws (9), the four groups of socket head cap screws (9) are respectively screwed in the four groups of threaded holes (10), and the bottom end of the guide sleeve connecting seat (2) tightly abuts against the top end of the outer sealing gasket (8), the bottom end of the sealing table (3) tightly abuts against the top end of the inner sealing gasket (7), two groups of annular sealing grooves (12) are provided on the outer wall of the guide sleeve (4), sealing rubber rings (11) are sleeved and clamped in the two groups of annular sealing grooves (12), the outer wall of the sealing rubber ring (11) tightly abuts against the inner wall of the cylinder block (1), a guide hole (15) is provided through the guide sleeve connecting seat (2), the sealing table (3) and the guide sleeve (4), two groups of inner O-ring seals (16) are sleeved on the outer wall of the piston disk (13), and the piston disk (13) is movably installed inside the cylinder block (1) through the cooperation of the inner O-ring seals (16) and the inner wall of the cylinder block (1), and the piston rod (14) slidably passes through the guide hole (15) through the cooperation with the outer O-ring seal (17).

2. The hydraulic cylinder sealing device according to claim 1, wherein A collecting mechanism for collecting oil leakage is provided at the top end of the guide sleeve connecting seat (2), the collecting mechanism includes a collecting shell (18), the collecting shell (18) is fixedly installed at the top end of the guide sleeve connecting seat (2), a sliding hole communicating with the guide hole (15) is provided on the collecting shell (18), sealing rings (19) are fixedly provided in the sliding holes at the upper and lower ends of the collecting shell (18), the piston rod (14) slidably passes through the sliding hole through the cooperation with the sealing rings (19), a drain pipe (20) is fixedly communicated with one side of the outer wall of the collecting shell (18), and an oil cap (21) is screwed on the drain pipe (20).

3. A hydraulic cylinder sealing device according to claim 2, characterized in that, A buffer rubber pad (22) is fixedly connected to the top end of the piston disk (13), and the buffer rubber pad (22) is sleeved on the piston rod (14).

4. The hydraulic cylinder sealing device according to claim 3, characterized in that, An annular frustum (23) is provided on the inner side of the bottom of the collecting shell (18).

5. The hydraulic cylinder sealing device according to claim 4, characterized in that, Four groups of counterbores (24) are provided on the guide sleeve connecting seat (2) for matching with the socket head cap screws (9).

6. The hydraulic cylinder sealing device according to claim 5, characterized in that, Anti-slip lines are provided on the outer wall of the oil cap (21).

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