Hydraulic cylinder sleeve

Abstract

The utility model discloses a hydraulic cylinder sleeve relates to hydraulic sleeve technical field, including hydraulic cylinder body, the inner wall of hydraulic cylinder body is installed hydraulic stem, the outer wall of hydraulic stem is installed and guards against sleeve, fixed shaft penetrates the inside of guard sleeve, the lateral wall of guard sleeve is equipped with the oil inlet, the inner wall of oil inlet is installed and is limited board, the inner wall of limited board is equipped with the oil hole, the inner wall of limited board is installed and seals the pole. The utility model discloses a hydraulic cylinder body, hydraulic stem, guard sleeve and fixed shaft are set up, and the inside of fixed shaft penetrates guard sleeve and is connected with the hydraulic stem screw thread, when the hydraulic stem stretches out, guard sleeve stretches out along with the hydraulic stem, and it is protected to it, avoids because the lubricating oil on the surface of hydraulic stem sticks dust, and brings into the hydraulic cylinder body, causes unusual wear and tear, influences its operation's fluency, and further improves the service life of hydraulic cylinder body and hydraulic stem.

Description

Technical Field

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

[0002] As the core actuator of hydraulic transmission systems, hydraulic cylinders have gradually become a key technology in industries such as industrial, engineering machinery, and aerospace due to their advantages such as high power density, smooth transmission, fast response speed, and large output force. However, when the hydraulic rod extends out of the hydraulic cylinder, it is exposed to the air and is prone to dust accumulation. When it retracts, it is prone to abnormal internal wear. To solve the above problems, a hydraulic cylinder sleeve is needed.

[0003] An existing hydraulic cylinder cannot protect the extended hydraulic rod during operation. Dust and impurities in the air adhere to the surface of the hydraulic rod, and when the hydraulic rod retracts, they bring the dust into the hydraulic cylinder, causing abnormal wear between the hydraulic rod and the inner wall of the hydraulic cylinder, reducing the service life of the hydraulic cylinder. When using a sleeve to protect the hydraulic rod, it is inconvenient to lubricate the sleeve and the outer wall of the hydraulic cylinder. The sleeve needs to be disassembled before lubrication can be performed, which is cumbersome and reduces work efficiency. Therefore, there is an urgent need for a hydraulic cylinder sleeve. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a hydraulic cylinder sleeve to solve the problems of existing hydraulic cylinders, which cannot protect the extended hydraulic rod during use. Dust and impurities in the air will adhere to the surface of the hydraulic rod, and when the hydraulic rod retracts, they will bring the dust into the hydraulic cylinder, causing abnormal wear between the hydraulic rod and the inner wall of the hydraulic cylinder, reducing the service life of the hydraulic cylinder. Furthermore, when using a sleeve to protect the hydraulic rod, it is not convenient to lubricate the sleeve and the outer wall of the hydraulic cylinder. The sleeve needs to be disassembled before lubrication can be performed, which is cumbersome and reduces work efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic cylinder sleeve, comprising a hydraulic cylinder body, a hydraulic rod installed on the inner wall of the hydraulic cylinder body, a protective sleeve installed on the outer wall of the hydraulic rod, and a fixed shaft penetrating the interior of the protective sleeve.

[0006] The protective sleeve has an oil inlet on its side wall, a limiting plate is installed on the inner wall of the oil inlet, an oil injection hole is installed on the inner wall of the limiting plate, a sealing rod is installed on the inner wall of the limiting plate, several plugs are installed on the outer wall of the sealing rod, a return spring is installed on the outer wall of the sealing rod, and a sealing cap is installed on the outer wall of the oil inlet.

[0007] Preferably, the protective sleeve is movably connected to the hydraulic cylinder body, and the fixed shaft passes through the interior of the protective sleeve and is threadedly connected to the hydraulic rod.

[0008] Preferably, the limiting plate is welded to the inner wall of the oil inlet, and the oil injection holes are arranged in a ring array with the central axis of the limiting plate as the center.

[0009] Preferably, the sealing rod forms a telescopic structure with the limiting plate via a return spring, and the plug is inserted into the oil injection hole.

[0010] Preferably, the sealing rod is movably connected to the limiting plate, and the sealing cover is threadedly connected to the oil inlet.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This utility model features a hydraulic cylinder body, a hydraulic rod, a protective sleeve, and a fixed shaft. The fixed shaft passes through the interior of the protective sleeve and is threadedly connected to the hydraulic rod. When the hydraulic rod extends, the protective sleeve extends along with it to protect it. This prevents dust adhering to the lubricating oil on the surface of the hydraulic rod from being brought into the hydraulic cylinder body, causing abnormal wear and affecting its smooth operation, thus further improving the service life of the hydraulic cylinder body and the hydraulic rod.

[0013] This invention utilizes an oil inlet, a limiting plate, an oil injection hole, a sealing rod, a plug, a return spring, and a sealing cap. The sealing cap is rotated off, and then the oil injector is inserted into the oil inlet and pushed inwards. The sealing rod, pushed inwards, displaces the plug from the oil injection hole, allowing oil to be injected. This lubricates the contact surface between the protective sleeve and the hydraulic cylinder, preventing hard friction and wear. After injection, the oil injector is removed, and the sealing rod, pushed by the return spring, locks the plug into the oil injection hole, preventing lubricant leakage. Finally, the sealing cap is tightened to the oil inlet thread. Compared to traditional lubrication methods, this invention allows for internal lubrication without disassembling the protective sleeve, saving disassembly and assembly time and improving processing efficiency. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the present utility model from the front view;

[0015] Figure 2 This is a side view of the structure of this utility model;

[0016] Figure 3 This is a structural diagram showing the disassembled internal components of this utility model;

[0017] Figure 4 This is a structural diagram showing the components surrounding the sealing rod of this utility model disassembled;

[0018] Figure 5 This is a schematic diagram showing the internal cross-section of the protective sleeve of this utility model.

[0019] In the diagram: 1. Hydraulic cylinder body; 2. Hydraulic rod; 3. Protective sleeve; 4. Fixed shaft; 5. Oil inlet; 6. Limiting plate; 7. Oil injection hole; 8. Sealing rod; 9. Plug; 10. Return spring; 11. Sealing cover. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] The embodiments of this utility model will be described below based on its overall structure.

[0022] Please see Figures 1-5 A hydraulic cylinder sleeve includes a hydraulic cylinder body 1, characterized in that: a hydraulic rod 2 is installed on the inner wall of the hydraulic cylinder body 1, a protective sleeve 3 is installed on the outer wall of the hydraulic rod 2, a fixed shaft 4 penetrates the interior of the protective sleeve 3, the protective sleeve 3 is movably connected to the hydraulic cylinder body 1, and the fixed shaft 4 penetrates the interior of the protective sleeve 3 and is threadedly connected to the hydraulic rod 2. Through the hydraulic cylinder body 1, hydraulic rod 2, protective sleeve 3, and fixed shaft 4, the fixed shaft 4 penetrates the interior of the protective sleeve 3 and is threadedly connected to the hydraulic rod 2. When the hydraulic rod 2 extends, the protective sleeve 3 extends along with the hydraulic rod 2 to protect it, preventing dust adhering to the lubricating oil on the surface of the hydraulic rod 2 from entering the hydraulic cylinder body 1, causing abnormal wear, affecting its smooth operation, and further improving the service life of the hydraulic cylinder body 1 and the hydraulic rod 2.

[0023] Please see Figures 1-5A hydraulic cylinder sleeve, wherein the protective sleeve 3 has an oil inlet 5 on its side wall, a limit plate 6 is installed on the inner wall of the oil inlet 5, an oil injection hole 7 is opened on the inner wall of the limit plate 6, a sealing rod 8 is installed on the inner wall of the limit plate 6, a plurality of plugs 9 are installed on the outer wall of the sealing rod 8, a return spring 10 is installed on the outer wall of the sealing rod 8, and a sealing cover 11 is installed on the outer wall of the oil inlet 5. The limit plate 6 is welded to the inner wall of the oil inlet 5, and the oil injection holes 7 are arranged in a ring array with the central axis of the limit plate 6 as the center. The sealing rod 8 and the limit plate 6 form a telescopic structure through the return spring 10. The plugs 9 are inserted into the oil injection holes 7. The sealing rod 8 is movably connected to the limit plate 6. The sealing cover 11 is threadedly connected to the oil inlet 5. The device consists of a hole 7, a sealing rod 8, a plug 9, a return spring 10, and a sealing cover 11. The sealing cover 11 is rotated off, and then the lubricator is inserted into the oil inlet 5 and pushed inwards. The sealing rod 8 is pushed inwards, causing the plug 9 to separate from the oil inlet 7, allowing for oil injection. This lubricates the contact surface between the protective sleeve 3 and the hydraulic cylinder 1, preventing hard friction and wear. After lubrication, the lubricator is removed. The sealing rod 8 is pushed by the spring force of the return spring 10, causing the plug 9 to engage and seal with the oil inlet 7, preventing lubricating oil from overflowing. Finally, the sealing cover 11 is threaded onto the oil inlet 5. Compared to traditional lubrication methods, this invention allows for internal lubrication without disassembling the protective sleeve 3, saving disassembly and assembly time and improving processing efficiency.

[0024] Working principle: In use, firstly, the fixed shaft 4 is threaded through the inside of the protective sleeve 3 and connected to the hydraulic rod 2. When the hydraulic rod 2 extends, the protective sleeve 3 extends along with it to protect it, preventing dust adhering to the lubricating oil on the surface of the hydraulic rod 2 from entering the hydraulic cylinder 1, causing abnormal wear and affecting its smooth operation, thus further improving the service life of the hydraulic cylinder 1 and the hydraulic rod 2. When it is necessary to lubricate the inner wall of the protective sleeve 3, the sealing cover 11 is rotated off, and then the oil injector is inserted into the oil inlet 5 and pushed inward. After being pushed, the sealing rod 8 is displaced inward, causing the plug 9 to separate from the oil injection hole 7, allowing the oil to enter the cylinder. Lubrication is performed on the contact surface between the protective sleeve 3 and the hydraulic cylinder 1 to prevent hard friction and wear. After lubrication, the lubricator is removed, and the sealing rod 8 is pushed by the spring force of the return spring 10 to make the plug 9 engage with the oil injection hole 7 to prevent lubricating oil from overflowing. Finally, the sealing cover 11 is tightened with the threaded oil inlet 5. Compared with the traditional lubrication method, this utility model can perform internal lubrication without disassembling the protective sleeve 3, saving disassembly and assembly time and improving processing efficiency. This completes the use of the device. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydraulic cylinder liner, comprising a hydraulic cylinder body (1), characterized in that: The hydraulic cylinder body (1) is equipped with a hydraulic rod (2) on its inner wall and a protective sleeve (3) is installed on the outer wall of the hydraulic rod (2). The fixed shaft (4) passes through the interior of the protective sleeve (3). The protective sleeve (3) has an oil inlet (5) on its side wall. A limiting plate (6) is installed on the inner wall of the oil inlet (5). An oil injection hole (7) is opened on the inner wall of the limiting plate (6). A sealing rod (8) is installed on the inner wall of the limiting plate (6). Several plugs (9) are installed on the outer wall of the sealing rod (8). A reset spring (10) is installed on the outer wall of the sealing rod (8). A sealing cap (11) is installed on the outer wall of the oil inlet (5).

2. A hydraulic cylinder liner according to claim 1, characterized in that: The protective sleeve (3) is movably connected to the hydraulic cylinder body (1), and the fixed shaft (4) passes through the interior of the protective sleeve (3) and is threadedly connected to the hydraulic rod (2).

3. A hydraulic cylinder liner according to claim 1, characterized in that: The limiting plate (6) is welded to the inner wall of the oil inlet (5), and the oil injection holes (7) are arranged in a ring array with the central axis of the limiting plate (6) as the center.

4. A hydraulic cylinder liner according to claim 1, characterized in that: The sealing rod (8) forms a telescopic structure with the limiting plate (6) through the return spring (10), and the plug (9) is inserted into the oil injection hole (7).

5. A hydraulic cylinder liner according to claim 1, characterized in that: The sealing rod (8) is movably connected to the limiting plate (6), and the sealing cover (11) is threadedly connected to the oil inlet (5).

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