Leak-proof device of hydraulic oil cylinder
By designing leakage prevention devices in hydraulic cylinders, using a combination structure of barrier ring, vertical rod, gasket and oil-absorbing cotton, the leaked oil is squeezed and absorbed, and the leakage of oil is solved, and the oil is recovered and utilized. Improved leakage prevention effect.
Patent Information
- Application Number
- CN202420480439.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-13
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-03-13
AI Technical Summary
Traditional hydraulic cylinders have leakage problems during long-term use, especially at the movable cylinder block and piston rod, which leads to oil leakage and fuel waste, and the existing technology has not effectively solved this problem.
A hydraulic oil cylinder anti-leakage device is designed, including a protective shell, cylinder block, piston rod, oil-absorbing cotton, gasket and oil return pipe. The gasket is continuously contacted by the vertical rod through the barrier ring to squeeze the oil-absorbing cotton, absorbing and recycling the leaked oil. The oil is collected and reflowed to the oil inlet connection port for utilization using the return pipe.
It effectively solves the leakage problem of hydraulic oil cylinder, realizes centralized collection and recycling of leaked oil, improves the leakage prevention effect of hydraulic oil cylinder, and avoids blockage caused by oil accumulation.
Smart Images
Figure CN222208460U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder anti-leakage device. Background Art
[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion or swinging motion. It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, a deceleration device can be eliminated, and there is no transmission gap and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines. When using a traditional hydraulic cylinder, the oil in the hydraulic cylinder is often used to directly push the lever to move, and the lever is used to support the object. At this time, because the oil in the main body of the hydraulic cylinder is liquid, poor sealing during use will cause oil leakage, making the hydraulic cylinder unusable.
[0003] The patent with the authorization announcement number CN218062888U discloses a hydraulic cylinder anti-leakage device, including a cylinder body, a mounting hole is formed through the lower end of the cylinder body, and sealing grooves and access grooves are symmetrically formed at both ends of the mounting hole, a connecting pipe, and a second external thread. When excessive wear and aging occur after long-term use, the protective replacement is low in cost and easy to operate. The setting of the double reinforcement ring further enhances the sealing effect of hydraulic oil access to prevent leakage. The above patent improves the sealing of the hydraulic cylinder by adding a seal. This method only further improves the sealing of the hydraulic cylinder, but the hydraulic cylinder will still have the problem of oil leakage after long-term use, which will still cause fuel waste. The leaked oil cannot be recycled, and the leakage problem of the hydraulic cylinder mainly occurs at the movable connection between the cylinder body and the piston rod. The above patent does not actually solve the leakage problem there. Summary of the invention
[0004] In view of the deficiencies in the prior art, the utility model provides a hydraulic cylinder anti-leakage device to solve the existing problems.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydraulic cylinder leakage prevention device comprises a protective shell and a cylinder body fixedly installed inside the protective shell, the top and bottom of the protective shell are fixedly installed with cover plates, a piston rod is movably installed on the inner side of the cylinder body, a piston connected to the piston rod is slidably connected to the inner side of the cylinder body, the piston rod is slidably inserted in the middle position of the cover plate, a fixing seat fixedly installed on the outer side of the cylinder body and fixedly inserted with the cover plate, a sleeve is fixedly installed on the inner side of the fixing seat through a connecting strip, the piston rod is slidably connected to the inner side of the sleeve, oil-absorbing cotton is installed between the sleeve and the fixing seat, a gasket is slidably installed between the sleeve and the fixing seat and above the oil-absorbing cotton, a symmetrically distributed vertical rod is fixedly installed on the top of the gasket, and a retaining ring that can contact the vertical rod is fixedly sleeved on the outer side of the piston rod.
[0006] As a preferred technical solution of the utility model, the side of the protective shell is embedded with evenly distributed reinforcing rods, and the upper and lower ends of the side of the protective shell are fixedly installed with an oil inlet connection port and an oil outlet connection port connected to the inside of the cylinder body, and an oil return pipe is fixedly installed between the fixed seat and the oil inlet connection port, one end of the oil return pipe is connected to the inner side of the fixed seat, and the other end of the oil return pipe is connected to the inner side of the oil inlet connection port.
[0007] As a preferred technical solution of the utility model, the oil-absorbing cotton is fitted between the sleeve and the fixing seat, and the surface of the oil-absorbing cotton is fitted to the connection between the piston rod and the cylinder body.
[0008] As a preferred technical solution of the utility model, the oil-absorbing cotton is of annular design and the height of the oil-absorbing cotton near the oil return pipe is gradually lower than the height of the oil-absorbing cotton far away from the oil return pipe.
[0009] As a preferred technical solution of the utility model, the outer thread of the sleeve is sleeved with a protective sleeve, the protective sleeve is fitted and installed with the fixing seat and has the same outer diameter, and the vertical rod passes through the protective sleeve and is slidably inserted on the surface of the protective sleeve.
[0010] As a preferred technical solution of the utility model, the cover plate is fixedly installed on both sides of the protective shell by bolts.
[0011] Compared with the prior art, the utility model provides a hydraulic cylinder anti-leakage device, which has the following beneficial effects:
[0012] 1. This hydraulic cylinder anti-leakage device continuously contacts the vertical rod and moves downward through the retaining ring. The vertical rod drives the gasket to move, squeezes the oil-absorbing cotton, and squeezes out the oil absorbed by the oil-absorbing cotton. The oil flows into the oil inlet connection port through the oil return pipe for recycling. In this way, the leaked oil can be collected centrally and the collected oil can be recycled during normal operation, which fundamentally solves the leakage problem of the hydraulic cylinder and improves the anti-leakage effect of the hydraulic cylinder.
[0013] 2. This hydraulic cylinder anti-leakage device has a ring-shaped design of oil-absorbing cotton and the height of the oil-absorbing cotton close to the oil return pipe is gradually lower than that of the oil-absorbing cotton far away from the oil return pipe. In this way, after the oil-absorbing cotton is squeezed, the squeezed oil will be concentrated at the connection between the oil return pipe and the fixed seat, so that the leaked oil can flow back quickly and avoid the squeezed oil accumulating on the inner side of the fixed seat to cause blockage. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the structure of the utility model;
[0015] Figure 2 This is a schematic diagram of the structure near the gasket of the utility model;
[0016] Figure 3 This is a schematic diagram of the structure of the oil-absorbing cotton of the utility model;
[0017] Figure 4 This is a cross-sectional view of the structure of the oil-absorbing cotton of the utility model;
[0018] Figure 5 It is a schematic diagram of the structure distribution near the connecting strip of the utility model.
[0019] In the figure: 1. protective shell; 11. reinforcing rod; 12. cover plate; 2. cylinder body; 3. oil inlet connection port; 4. oil outlet connection port; 5. fixing seat; 51. gasket; 52. oil absorbing cotton; 53. connecting strip; 6. sleeve; 7. piston rod; 71. retaining ring; 8. protective sleeve; 81. vertical rod; 9. oil return pipe. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example
[0021] See also Figure 1-5In this embodiment: a hydraulic cylinder leakage prevention device comprises a protective shell 1 and a cylinder body 2 fixedly installed inside the protective shell 1, a cover plate 12 is fixedly installed on the top and bottom of the protective shell 1, a piston rod 7 is movably installed on the inner side of the cylinder body 2, a piston connected to the piston rod 7 is slidably connected to the inner side of the cylinder body 2, the piston rod 7 is slidably inserted in the middle position of the cover plate 12, a fixing seat 5 fixedly installed on the outer side of the cylinder body 2 and fixedly inserted with the cover plate 12, a sleeve 6 is fixedly installed on the inner side of the fixing seat 5 through a connecting strip 53, the piston rod 7 is slidably connected to the inner side of the sleeve 6, an oil-absorbing cotton 52 is installed between the sleeve 6 and the fixing seat 5, a gasket 51 is slidably installed between the sleeve 6 and the fixing seat 5 and above the oil-absorbing cotton 52, a symmetrically distributed vertical rod 81 is fixedly installed on the top of the gasket 51, and the piston rod 7 is fixedly installed on the outer side of the cylinder body 2. The outer fixed sleeve is provided with a retaining ring 71 which can contact the vertical rod 81. When in use, during the long-term continuous reciprocating motion of the piston rod 7, if oil leakage occurs at the connection position between the piston rod 7 and the cylinder body 2, the oil will seep into the fixed seat 5. At this time, the oil-absorbing cotton 52 will absorb the seeping oil. At the same time, during the reciprocating motion of the piston rod 7, the retaining ring 71 will be driven to move, so that the retaining ring 71 will continuously contact the vertical rod 81 to move downward. The vertical rod 81 drives the gasket 51 to move, squeeze the oil-absorbing cotton 52, and after the oil absorbed by the oil-absorbing cotton 52 is squeezed out, it flows into the oil inlet connection port 3 through the oil return pipe 9 for recycling. In this way, the leaked oil can be collected in a centralized manner, and the collected oil can be recycled during normal operation, thereby fundamentally solving the leakage problem of the hydraulic cylinder and improving the anti-leakage effect of the hydraulic cylinder.
[0022] As a preferred embodiment, the side of the protective shell 1 is embedded with evenly distributed reinforcing rods 11 to improve the protective strength of the protective shell 1 to the cylinder body 2. The upper and lower ends of the side of the protective shell 1 are fixedly installed with an oil inlet connection port 3 and an oil outlet connection port 4 connected to the inside of the cylinder body 2. A return oil pipe 9 is fixedly installed between the fixed seat 5 and the oil inlet connection port 3 for recovering leaked oil. One end of the return oil pipe 9 is connected to the inner side of the fixed seat 5, and the other end of the return oil pipe 9 is connected to the inner side of the oil inlet connection port 3. A one-way valve is installed in the middle position of the return oil pipe 9 to prevent oil reflux from the oil inlet connection port 3 and ensure the normal circulation of leaked recovered oil.
[0023] As a preferred embodiment, the outer side of the sleeve 6 is threadedly sleeved with a protective sleeve 8, the protective sleeve 8 is fitted and installed with the same outer diameter as the fixing seat 5, the vertical rod 81 passes through the protective sleeve 8 and is slidably inserted on the surface of the protective sleeve 8, the protective sleeve 8 protects the fixing seat 5 and the oil-absorbing cotton 52, and further improves the anti-leakage effect of the hydraulic cylinder. Example
[0024] See also Figure 1-5In this embodiment: the oil-absorbing cotton 52 is fitted between the sleeve 6 and the fixing seat 5, and the surface of the oil-absorbing cotton 52 is fitted to the connection between the piston rod 7 and the cylinder body 2, to ensure that once there is an oil leakage problem, the oil-absorbing cotton 52 can quickly absorb the oil and recover it through the oil return pipe 9 under the pressure of the gasket 51.
[0025] As a preferred embodiment, the cover plate 12 is fixedly mounted on both sides of the protective shell 1 by bolts, so as to facilitate the disassembly and maintenance of the hydraulic cylinder.
[0026] As a preferred embodiment, the oil-absorbing cotton 52 is designed to be annular and the height of the oil-absorbing cotton 52 close to the oil return pipe 9 is gradually lower than the height of the oil-absorbing cotton 52 far away from the oil return pipe 9. In this way, after the oil-absorbing cotton 52 is squeezed, the squeezed oil will be concentrated at the connection between the oil return pipe 9 and the fixed seat 5, so that the leaked oil can flow back quickly, avoiding the squeezed oil from accumulating on the inner side of the fixed seat 5 and causing blockage.
[0027] The working principle and use process of the utility model are as follows: during the long-term continuous reciprocating motion of the piston rod 7, if oil leakage occurs at the connection position between the piston rod 7 and the cylinder body 2, the oil will seep into the fixing seat 5. At this time, the oil-absorbing cotton 52 will absorb the seeping oil. At the same time, during the reciprocating motion of the piston rod 7, the retaining ring 71 will be driven to move, so that the retaining ring 71 will continuously contact the vertical rod 81 to move downward, and the vertical rod 81 will drive the gasket 51 to move, squeezing the oil-absorbing cotton 52. After the oil absorbed by the oil-absorbing cotton 52 is squeezed out, it flows into the oil inlet connection port 3 through the oil return pipe 9 for recycling. In this way, the leaked oil can be collected in a centralized manner, and the collected oil can be recycled during normal operation, thereby fundamentally solving the leakage problem of the hydraulic cylinder and improving the anti-leakage effect of the hydraulic cylinder.
[0028] Finally, it should be noted that the above are only preferred embodiments of the utility model and are not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A hydraulic cylinder anti-leakage device, comprising a protective shell (1) and a cylinder body (2) fixedly mounted inside the protective shell (1), characterized in that: The top and bottom of the protective shell (1) are fixedly mounted with a cover plate (12); a piston rod (7) is movably mounted on the inner side of the cylinder body (2); a piston connected to the piston rod (7) is slidably connected to the inner side of the cylinder body (2); the piston rod (7) is slidably plugged into the middle position of the cover plate (12); a fixing seat (5) fixedly plugged into the cover plate (12) is fixedly mounted on the outer side of the cylinder body (2); the inner side of the fixing seat (5) is fixedly mounted via a connecting strip (53). A sleeve (6) is installed, the piston rod (7) is slidably connected to the inner side of the sleeve (6), an oil-absorbing cotton (52) is installed between the sleeve (6) and the fixed seat (5), a washer (51) is slidably installed between the sleeve (6) and the fixed seat (5) and above the oil-absorbing cotton (52), a symmetrically distributed vertical rod (81) is fixedly installed on the top of the washer (51), and a retaining ring (71) that can contact the vertical rod (81) is fixedly sleeved on the outer side of the piston rod (7).
2. A hydraulic cylinder anti-leakage device according to claim 1, characterized in that: The side of the protective shell (1) is embedded with evenly distributed reinforcing rods (11), and the upper and lower ends of the side of the protective shell (1) are fixedly mounted with an oil inlet connection port (3) and an oil outlet connection port (4) that are in communication with the inside of the cylinder body (2), and an oil return pipe (9) is fixedly mounted between the fixing seat (5) and the oil inlet connection port (3), one end of the oil return pipe (9) is in communication with the inside of the fixing seat (5), and the other end of the oil return pipe (9) is in communication with the inside of the oil inlet connection port (3).
3. A hydraulic cylinder anti-leakage device according to claim 2, characterized in that: The oil-absorbing cotton (52) is fitted between the sleeve (6) and the fixing seat (5), and the surface of the oil-absorbing cotton (52) is fitted at the connection between the piston rod (7) and the cylinder body (2).
4. A hydraulic cylinder anti-leakage device according to claim 3, characterized in that: The oil-absorbing cotton (52) is of an annular design, and the height of the oil-absorbing cotton (52) close to the oil return pipe (9) is gradually lower than that of the oil-absorbing cotton (52) far from the oil return pipe (9).
5. The anti-leakage device for hydraulic cylinder according to claim 3, characterized in that: The outer thread of the sleeve (6) is sleeved with a protective sleeve (8), the protective sleeve (8) and the fixing seat (5) are fitted and installed and have the same outer diameter, and the vertical rod (81) passes through the protective sleeve (8) and is slidably inserted on the surface of the protective sleeve (8).
6. The anti-leakage device for a hydraulic cylinder according to claim 1, characterized in that: The cover plate (12) is fixedly mounted on both sides of the protective shell (1) by means of bolts.