A hydraulic cylinder seal protection device

Abstract

The utility model discloses a kind of hydraulic oil cylinder sealing protection devices, belong to hydraulic oil cylinder technical field, including the butt joint assembly for the connection of external oil pipe and oil nozzle, further including the protection assembly for the protection of butt joint assembly;The butt joint assembly includes screwing portion, first connecting part and second connecting part;The utility model is connected by setting butt joint assembly, simple structure, convenient and practical, it is convenient to connect oil nozzle with external oil pipe, and by setting protection assembly, after external oil pipe dismounting, the pipe opening of butt joint assembly can be automatically outwardly ejected to protect by sliding sleeve, the rubber sheet in sliding sleeve can be blocked to the pipe opening of sliding sleeve, further improve the protection effect, reduce the risk of impurity into cylinder, and protection assembly can be ejected automatically protection or reset with the dismounting of oil pipe, greatly reduce the difficulty of sealing protection work, improve work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a hydraulic cylinder sealing and protection device. Background Technology

[0002] Hydraulic cylinders are actuators that convert hydraulic energy into mechanical energy. They drive pistons or plungers to perform linear reciprocating motion using the pressure of hydraulic oil. They are widely used in engineering machinery, metallurgy, machine tools, shipbuilding, and other fields. Hydraulic cylinders typically consist of components such as cylinder barrel, piston, piston rod, and end caps. High-pressure oil enters and exits through the oil port, and thrust or pull is generated by utilizing the pressure difference on both sides of the piston. They are characterized by large output force, smooth transmission, rapid response, and compact structure. They can accurately achieve functions such as heavy-duty drive and reciprocating cycle operation under various working conditions, and are the core component for achieving linear motion in hydraulic systems.

[0003] The grease fittings of hydraulic cylinders are typically used to connect hydraulic lines and are the key interfaces for the inlet and outlet of hydraulic oil. During the maintenance of hydraulic cylinders, the oil lines are usually disconnected from the grease fittings. This disconnection exposes the connecting bolts at the grease fittings to the external environment. The maintenance site may contain metal shavings, dust, fibrous impurities, etc., which could contaminate the connecting bolts and enter the cylinder. These impurities will flow with the hydraulic oil and, under high pressure, erode critical components such as the piston, seals, and cylinder wall, causing abnormal wear, shortening the cylinder's service life, and potentially leading to leaks. Currently, after disassembling a hydraulic cylinder, it is usually necessary to separately seal and protect the connecting bolts at the grease fittings, which is cumbersome and affects maintenance efficiency. Existing technology has not solved this problem. Utility Model Content

[0004] The purpose of this utility model is to provide a hydraulic cylinder sealing and protection device. By setting a protective component, after the external oil pipe is disassembled, the sliding sleeve can automatically pop out to protect the pipe opening of the docking component. The rubber sheet inside the sliding sleeve can seal the pipe opening of the sliding sleeve, further improving the protection effect and reducing the risk of impurities entering the cylinder. Moreover, the protective component can automatically pop out for protection or reset with the disassembly and assembly of the oil pipe, which greatly reduces the difficulty of sealing and protection work and improves work efficiency, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A hydraulic cylinder sealing protection device includes a docking assembly for connecting an external oil pipe and an oil nozzle, and a protective assembly for protecting the docking assembly.

[0007] The docking assembly includes a screwing part, a first connecting part, and a second connecting part, wherein the first connecting part and the second connecting part are respectively welded to both sides of the screwing part;

[0008] The protective component includes a sliding sleeve, which is slidably installed on the outside of the second connecting part. A rubber sheet for protecting the opening of the second connecting part is provided on one inner wall of the sliding sleeve. A slot is fixedly installed on one inner wall of the sliding sleeve, and the rubber sheet is installed in the slot. A cross-shaped through groove is opened on the surface of the rubber sheet.

[0009] Preferably, the first connecting part is threadedly connected to the oil nozzle of the hydraulic cylinder, and the second connecting part is threadedly connected to the connector of the external oil pipe.

[0010] Preferably, a first limiting ring is fixedly installed on the inner wall of the other side of the sliding sleeve. The first limiting ring is slidably engaged with the second connecting part, and one side of the first limiting ring abuts against the second limiting ring.

[0011] Preferably, the second limiting ring is fixedly installed on the second connecting part, and a spring is slidably sleeved on the surface of the second connecting part.

[0012] Preferably, one end of the spring abuts against the twisting part, and the other end of the spring abuts against the other side of the first limiting ring.

[0013] Preferably, the sliding sleeve includes two sets of symmetrically arranged arc-shaped sleeves, and mounting plates are integrally formed on both sides of the arc-shaped sleeves.

[0014] Preferably, the mounting plate has mounting holes on its surface, and the two sets of mounting plates of the arc-shaped sleeve are connected by screws.

[0015] Preferably, a sealing ring is fixedly installed at the pipe opening at one end of the arc-shaped sleeve outside the second connecting part, and the sealing ring slides in fit with the second connecting part.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model features a simple and convenient docking assembly, facilitating the connection of the nozzle to external oil pipes. Furthermore, a protective component automatically ejects a sliding sleeve to protect the pipe opening of the docking assembly after the external oil pipe is disassembled. An internal rubber sheet within the sliding sleeve seals the pipe opening, further enhancing protection and reducing the risk of impurities entering the cylinder. The protective component automatically ejects or resets as the oil pipe is installed or removed, significantly reducing the difficulty of sealing and improving work efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the protective component structure;

[0020] Figure 3 This is a schematic diagram of the internal structure of the sliding sleeve;

[0021] Figure 4 This is a schematic diagram of the docking component structure;

[0022] Figure 5 This is a schematic diagram of the explosion separation structure of the protective component.

[0023] In the diagram: 1. Hydraulic cylinder; 2. Oil nozzle; 3. External oil pipe; 4. Connecting assembly; 401. Tightening part; 402. First connecting part; 403. Second connecting part; 5. Sliding sleeve; 501. Arc sleeve; 502. Mounting plate; 6. Rubber sheet; 7. Slot; 8. First limiting ring; 9. Second limiting ring; 10. Spring; 11. Sealing ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-5 This utility model provides a technical solution:

[0026] A hydraulic cylinder sealing and protection device includes a docking assembly 4 for connecting an external oil pipe 3 and an oil nozzle 2. The docking assembly 4 includes a screwing part 401, a first connecting part 402 and a second connecting part 403. The first connecting part 402 and the second connecting part 403 are respectively welded to both sides of the screwing part 401. The first connecting part 402 is threadedly connected to the oil nozzle 2 of the hydraulic cylinder 1, and the second connecting part 403 is threadedly connected to the connector of the external oil pipe 3.

[0027] By setting up the docking component 4, it is easy to connect the oil nozzle 2 of the hydraulic cylinder 1 to the external oil pipe 3. The turning part 401 provides the operator with a force-saving point, which facilitates the quick completion of loading and unloading operations with tools, greatly improving maintenance efficiency. The first connecting part 402 is precisely matched with the oil nozzle 2 of the cylinder through threads, ensuring a tight connection and reliable sealing to avoid hydraulic oil leakage. The second connecting part 403 is matched with the connector of the external oil pipe 3, and the rigid connection between the pipeline and the cylinder is achieved through thread engagement, ensuring the stable flow of hydraulic oil under high pressure conditions. Overall, the docking component 4 not only realizes the mechanical connection between the oil nozzle 2 and the oil pipe, but also provides an installation base for the protective component and a moving guide for the sliding sleeve 5.

[0028] It also includes a protective component for protecting the docking assembly 4. The protective component includes a sliding sleeve 5, which is slidably installed on the outside of the second connecting part 403. A rubber sheet 6 for protecting the opening of the second connecting part 403 is provided on one inner wall of the sliding sleeve 5. A groove 7 is fixedly installed on one inner wall of the sliding sleeve 5, and the rubber sheet 6 is installed in the groove 7. A cross-shaped through groove is opened on the surface of the rubber sheet 6. A first limiting ring 8 is fixedly installed on the other inner wall of the sliding sleeve 5. The first limiting ring 8 is slidably engaged with the second connecting part 403. One side of the first limiting ring 8 abuts against the second limiting ring 9. The second limiting ring 9 is fixedly installed on the second connecting part 403. A spring 10 is connected to the sliding sleeve 5 on the surface of the second connecting part 403. One end of the spring 10 abuts against the turning part 401, and the other end of the spring 10 abuts against the other side of the first limiting ring 8.

[0029] The protective components are a key structure to protect the hydraulic cylinder 1, nozzle 2, and docking parts from contamination. When the external oil pipe 3 is disassembled, the elastic potential energy of the spring 10 pushes the sliding sleeve 5 outward along the second connecting part 403, quickly wrapping the opening of the docking component 4 to form a physical barrier, effectively blocking the intrusion of external dust, metal shavings, and other impurities. The rubber sheet 6 inside the sliding sleeve 5 is fixed by the slot 7, and its surface cross groove allows the second connecting part 403 to pass through. After the sliding sleeve 5 is ejected and no longer restricted by the second connecting part 403, it closes naturally, further enhancing the sealing effect. When the external oil pipe 3 is installed, it can automatically open and fit outside the second connecting part 403 as the sliding sleeve 5 moves, without affecting normal assembly. The cooperation of the first limiting ring 8 and the second limiting ring 9 limits the ejection distance of the sliding sleeve 5, preventing it from detaching from the second connecting part 403. In addition, the protective components can automatically complete protection or reset with the disassembly and installation of the external oil pipe 3 without additional operation, which simplifies the maintenance process and ensures the timeliness and reliability of protection, significantly reducing the risk of cylinder failure caused by impurities.

[0030] The sliding sleeve 5 includes two sets of symmetrically arranged arc-shaped sleeves 501. The two sides of the arc-shaped sleeve 501 are integrally formed with mounting plates 502. The mounting plates 502 have mounting holes on their surfaces. The mounting plates 502 of the two sets of arc-shaped sleeves 501 are connected by screws. A sealing ring 11 is fixedly installed at the pipe opening at one end of the arc-shaped sleeve 501 outside the second connecting part 403. The sealing ring 11 slides in cooperation with the second connecting part 403.

[0031] By setting the sliding sleeve 5 as two sets of arc-shaped sleeves 501, the protective function is ensured while facilitating the disassembly and maintenance of the sliding sleeve 5 and the protective components. The sliding sleeve 5 adopts two sets of symmetrically designed arc-shaped sleeves 501, which can be quickly spliced ​​or disassembled through the mounting plates 502 on both sides and screws. This not only facilitates the later installation after the hydraulic cylinder 1 is assembled, but also makes it convenient to replace and maintain vulnerable parts such as the internal rubber sheet 6 and the sealing ring 11. The curved surface structure of the arc-shaped sleeve 501 matches the outer contour of the second connecting part 403, which can maintain stable guidance during sliding and avoid protection failure due to shaking. The sealing ring 11 at one end of the pipe is in close contact with the second connecting part 403, which can prevent impurities from entering the interior of the sliding sleeve 5 during the use of the hydraulic cylinder 1 and extend its service life.

[0032] In practical use, after moving the device to the designated position, first rotate the docking assembly 4 by turning the screwing part 401 to tighten the first connecting part 402 with the oil nozzle 2 of the hydraulic cylinder 1, completing the basic connection with the cylinder; then align the connector of the external oil pipe 3 with the second connecting part 403. During the screwing process, the connector of the external oil pipe 3 will push the sliding sleeve 5 towards the screwing part 401 to compress the spring 10. At this time, the sliding sleeve 5 is pushed by the connector of the external oil pipe 3, which simultaneously drives the internal rubber sheet 6 to move. The rubber sheet 6 is pushed by the pipe opening of the second connecting part 403, and the cross groove automatically opens until the connector of the external oil pipe 3 is fully engaged and fixed with the second connecting part 403, and the spring 10 is in a compressed state. The protective components are reset after installation of the pipeline. The sealing ring 11 fits tightly with the second connection part 403 to prevent impurities from entering. When it is necessary to disassemble the external oil pipe 3 connector for maintenance, unscrew the external oil pipe 3 connector in the opposite direction. The compressed spring 10 releases its elasticity and pushes the sliding sleeve 5 to slide outward along the second connection part 403 until the first limit ring 8 touches the second limit ring 9 and stops. At this time, the sliding sleeve 5 completely covers the pipe opening of the second connection part 403, and the cross groove of the rubber sheet 6 closes naturally to form a seal, completing the automatic protection. If it is necessary to replace the rubber sheet 6 or the sealing ring 11, the screws on the mounting plate 502 can be unscrewed, the two sets of arc sleeves 501 can be disassembled and the parts replaced, and then the mounting plate 502 can be used to fix them again.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder sealing protection device, comprising a docking assembly (4) for connecting an external oil pipe (3) and an oil nozzle (2), characterized in that: It also includes protective components for protecting the docking assembly (4); The docking assembly (4) includes a screwing part (401), a first connecting part (402), and a second connecting part (403), wherein the first connecting part (402) and the second connecting part (403) are respectively welded to both sides of the screwing part (401); The protective component includes a sliding sleeve (5), which is slidably installed on the outside of the second connecting part (403). A rubber sheet (6) for protecting the opening of the second connecting part (403) is provided on one inner wall of the sliding sleeve (5). A slot (7) is fixedly installed on one inner wall of the sliding sleeve (5). The rubber sheet (6) is installed in the slot (7). A cross-shaped through groove is opened on the surface of the rubber sheet (6).

2. The hydraulic cylinder sealing protection device according to claim 1, characterized in that: The first connecting part (402) is threadedly connected to the oil nozzle (2) of the hydraulic cylinder (1), and the second connecting part (403) is threadedly connected to the connector of the external oil pipe (3).

3. The hydraulic cylinder sealing protection device according to claim 1, characterized in that: A first limiting ring (8) is fixedly installed on the inner wall of the other side of the sliding sleeve (5). The first limiting ring (8) slides with the second connecting part (403), and one side of the first limiting ring (8) abuts against the second limiting ring (9).

4. A hydraulic cylinder sealing protection device according to claim 3, characterized in that: The second limiting ring (9) is fixedly installed on the second connecting part (403), and a spring (10) is connected to the sliding sleeve (5) on the surface of the second connecting part (403).

5. A hydraulic cylinder sealing protection device according to claim 4, characterized in that: One end of the spring (10) abuts against the twisting part (401), and the other end of the spring (10) abuts against the other side of the first limiting ring (8).

6. A hydraulic cylinder sealing protection device according to claim 1, characterized in that: The sliding sleeve (5) includes two sets of symmetrically arranged arc sleeves (501), and mounting plates (502) are integrally formed on both sides of the arc sleeves (501).

7. A hydraulic cylinder sealing protection device according to claim 6, characterized in that: The mounting plate (502) has mounting holes on its surface, and the mounting plates (502) of the two sets of arc sleeves (501) are connected by screws.

8. A hydraulic cylinder sealing protection device according to claim 7, characterized in that: A sealing ring (11) is fixedly installed at the pipe opening at one end of the arc-shaped sleeve (501) on the outside of the second connecting part (403), and the sealing ring (11) slides in cooperation with the second connecting part (403).

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