A double acting hydraulic cylinder with an enhanced guide sleeve

Abstract

The utility model relates to the technical field of oil cylinder, and disclose a double -acting hydraulic cylinder with reinforced guide sleeve, including hydraulic cylinder, the front end fixed mounting of hydraulic cylinder has the installation shaft, and the surface of installation shaft is provided with the locating groove, and the inner wall of locating groove is slidably installed with fixed block, and the outside fixed mounting of fixed block has the guide sleeve, and the inside of guide sleeve is provided with first sealing groove, and first sealing groove is inlayed with inner sealing strip, and the outside of guide sleeve is provided with second sealing groove, and second sealing groove is inlayed with outer sealing strip, and the inside of guide sleeve is provided with lubricating groove, and the inside fixed mounting of fixed block has lubricating pipeline, and the inside fixed of fixed block is provided with cylindrical oil leak, and the inner wall of cylindrical oil leak is provided with fixed groove, and the inside installation of hydraulic cylinder has piston rod. Can conveniently add lubricating oil to guide sleeve, need not to dismount guide sleeve, has greatly promoted maintenance efficiency, has guaranteed that hydraulic cylinder can long -term stable operation.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a double-acting hydraulic cylinder with an enhanced guide sleeve. Background Technology

[0002] Double-acting hydraulic cylinders are common hydraulic actuators that achieve the reciprocating motion of a piston rod through the alternating input of hydraulic oil. They are widely used in engineering machinery, machine tools, metallurgical machinery, and other fields. The guide sleeve, as a key component of the double-acting hydraulic cylinder, primarily guides and supports the piston rod. It also works with seals to achieve a seal between the inside and outside of the cylinder, preventing hydraulic oil leakage and the entry of external impurities into the cylinder.

[0003] Existing double-acting hydraulic cylinders require periodic lubrication after prolonged operation. However, adding lubricating oil to existing double-acting hydraulic cylinders necessitates stopping the machine and disassembling it, which is inconvenient and affects equipment operating efficiency. Utility Model Content

[0004] (a) Technical problems to be solved This invention addresses the shortcomings of existing technologies by providing a double-acting hydraulic cylinder with an enhanced guide sleeve. This cylinder allows for convenient addition of lubricating oil to the guide sleeve without disassembling it, greatly improving maintenance efficiency and ensuring long-term stable operation of the hydraulic cylinder. This solves the problems mentioned in the background section.

[0005] (II) Technical Solution To achieve the above objectives, the following technical solution is provided: A double-acting hydraulic cylinder with an enhanced guide sleeve, comprising a hydraulic cylinder, an mounting shaft fixedly mounted at the front end of the hydraulic cylinder, a positioning groove formed on the surface of the mounting shaft, a fixing block slidably mounted on the inner wall of the positioning groove, a guide sleeve fixedly mounted on the outer side of the fixing block, a first sealing groove formed on the inner side of the guide sleeve, an inner sealing strip embedded in the first sealing groove, a second sealing groove formed on the outer side of the guide sleeve, an outer sealing strip embedded in the second sealing groove, a lubrication groove formed on the inner side of the guide sleeve, a lubrication pipeline fixedly mounted inside the fixing block, a cylindrical oil drain port fixedly formed inside the fixing block, a fixing groove formed on the inner wall of the cylindrical oil drain port, and a piston rod installed inside the hydraulic cylinder.

[0006] Preferably, a fixing rod is fixedly installed inside the fixing groove, a slider is slidably installed on the outside of the fixing rod, a sealing ball is fixedly installed on the outside of the slider, and a spring is wound around the outside of the fixing rod, with the two ends of the spring abutting against the slider and the inner wall of the fixing groove, respectively.

[0007] Preferably, the lubrication pipeline, the cylindrical oil drain port, and the lubrication groove are interconnected, and a one-way valve is provided at the upper end of the lubrication pipeline.

[0008] Preferably, the outer side of the mounting shaft is provided with an external thread, and a positioning thread cap is connected to the outer thread of the external thread. A protrusion is fixedly installed on the inner wall of the positioning thread cap.

[0009] Preferably, a pressure plate is fixedly installed at the front end of the guide sleeve, and a limiting plate is fixedly installed on the inner wall of the hydraulic cylinder.

[0010] Preferably, the front end of the guide sleeve is provided with a dustproof groove, and a dustproof sealing strip is embedded in the dustproof groove.

[0011] (III) Beneficial Effects Compared with the prior art, this utility model provides a double-acting hydraulic cylinder with an enhanced guide sleeve, which has the following beneficial effects: 1. This double-acting hydraulic cylinder with an enhanced guide sleeve, through the arrangement of a fixed block, guide sleeve, inner sealing strip, outer sealing strip, lubrication pipeline, lubrication groove, cylindrical oil drain port, fixed groove, fixed rod, spring, slider, and sealing ball, allows for convenient addition of lubricating oil to the guide sleeve without disassembling the guide sleeve, greatly improving maintenance efficiency and ensuring long-term stable operation of the hydraulic cylinder.

[0012] 2. This double-acting hydraulic cylinder with an enhanced guide sleeve, featuring a mounting shaft, positioning groove, fixing block, dustproof sealing strip, piston rod, pressure plate, external thread, positioning thread cap, and limiting plate, allows for convenient installation and removal of the guide sleeve, while effectively improving internal and external sealing and preventing external dust and impurities from entering the hydraulic cylinder. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main body of this utility model; Figure 2 This is a schematic cross-sectional view of the inside of the guide sleeve of this utility model; Figure 3 This is a cross-sectional view of the cylindrical oil leak port of this utility model.

[0014] In the diagram: 1. Hydraulic cylinder; 2. Mounting shaft; 3. Positioning groove; 4. Fixing block; 5. Guide sleeve; 6. Inner sealing strip; 7. Outer sealing strip; 8. Lubrication pipeline; 9. Lubrication groove; 10. Cylindrical oil drain port; 11. Fixing groove; 12. Fixing rod; 13. Spring; 14. Slider; 15. Sealing ball; 16. Dustproof sealing strip; 17. Piston rod; 18. Pressure plate; 19. External thread; 20. Positioning thread cap; 21. Limiting plate. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments, not all embodiments. Based on the above embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0016] Example 1: Please see Figure 1-3 A double-acting hydraulic cylinder 1 with an enhanced guide sleeve includes a hydraulic cylinder 1, a mounting shaft 2 fixedly mounted at the front end of the hydraulic cylinder 1, a positioning groove 3 formed on the surface of the mounting shaft 2, a fixing block 4 slidably mounted on the inner wall of the positioning groove 3, a guide sleeve 5 fixedly mounted on the outer side of the fixing block 4, a first sealing groove formed on the inner side of the guide sleeve 5, an inner sealing strip 6 embedded in the first sealing groove, a second sealing groove formed on the outer side of the guide sleeve 5, an outer sealing strip 7 embedded in the second sealing groove, a lubrication groove 9 formed on the inner side of the guide sleeve 5, a lubrication pipeline 8 fixedly mounted inside the fixing block 4, a cylindrical oil drain port 10 fixedly formed inside the fixing block 4, a fixing groove 11 formed on the inner wall of the cylindrical oil drain port 10, and a piston rod 17 installed inside the hydraulic cylinder 1.

[0017] Specifically, the piston rod 17 passes through the interior of the guide sleeve 5, and the inner sealing strip 6 adheres to the surface of the piston rod 17 to achieve a seal. Four inner sealing strips 6 are symmetrically distributed above and below the lubrication groove 9, ensuring good sealing performance during the reciprocating motion of the piston rod 17. The outer sealing strip 7 fits tightly against the inner wall of the hydraulic cylinder 1, improving the sealing performance between the guide sleeve 5 and the hydraulic cylinder 1. The lubrication pipeline 8 can conveniently and directly deliver lubricating oil to the lubrication groove 9, which seeps into the lubrication groove 9 through the cylindrical oil drain port 10, allowing the lubricating oil to be evenly distributed between the guide sleeve 5 and the piston rod 17. This effectively lubricates the friction generated during the movement of the piston rod 17, reducing wear and extending the product's service life.

[0018] Preferably, a fixing rod 12 is fixedly installed inside the fixing groove 11, a slider 14 is slidably installed on the outside of the fixing rod 12, a sealing ball 15 is fixedly installed on the outside of the slider 14, and a spring 13 is wound around the outside of the fixing rod 12, with the two ends of the spring 13 abutting against the inner wall of the slider 14 and the fixing groove 11 respectively.

[0019] Specifically, the sealing ball 15 is tightly attached to the outlet end of the lubrication pipeline 8 under the elastic force of the spring 13, forming a one-way valve structure. When the oil pressure in the lubrication pipeline 8 reaches the set value, it pushes the slider 14 to move backward against the elastic force of the spring 13, causing the sealing ball 15 to disengage from the outlet end. The lubricating oil then flows into the cylindrical oil leak 10 and evenly seeps into the lubrication groove 9.

[0020] Preferably, the lubrication pipeline 8, the cylindrical oil drain port 10, and the lubrication groove 9 are interconnected, and a one-way valve is provided at the upper end of the lubrication pipeline 8.

[0021] Specifically, connect the external oil pipe to the upper end of the lubrication line 8, and open the check valve to inject lubricating oil into the lubrication line 8.

[0022] Preferably, the outer side of the mounting shaft 2 is provided with an external thread 19, and a positioning thread cap 20 is connected to the outer thread of the external thread 19. A protrusion is fixedly installed on the inner wall of the positioning thread cap 20.

[0023] Specifically, when installing the guide sleeve 5, the fixing block 4 is installed into the positioning groove 3, and then the positioning thread cap 20 is rotated to engage with the external thread 19 of the mounting shaft 2 and tightened. The positioning thread cap 20 will then be in close contact with the surface of the mounting block.

[0024] Preferably, a pressure plate 18 is fixedly installed at the front end of the guide sleeve 5, and a limiting plate 21 is fixedly installed on the inner wall of the hydraulic cylinder 1.

[0025] Specifically, after installation, the rear end of the guide sleeve 5 is in close contact with the limiting plate 21, while the pressure plate 18 is in close contact with the front end of the mounting shaft 2.

[0026] Preferably, the front end of the guide sleeve 5 is provided with a dustproof groove, and a dustproof sealing strip 16 is embedded in the dustproof groove.

[0027] Specifically, the dustproof sealing strip 16 embedded in the dustproof groove can effectively prevent external dust and impurities from entering the guide sleeve 5.

[0028] Working principle: During installation, the guide sleeve 5 is installed into the mounting shaft 2, the fixing block 4 is inserted into the positioning groove 3, and then the positioning thread cap 20 is rotated to make it engage with the external thread 19 and tighten. The rear end of the guide sleeve 5 is close to the limiting plate 21. At this time, the pressure plate 18 is close to the front end of the mounting shaft 2, while the outer sealing strip 7 is tightly fitted with the inner wall of the hydraulic cylinder 1. The inner sealing strip 6 achieves dynamic sealing by relying on the lubrication groove 9. The dustproof sealing strip 16 effectively blocks external impurities, effectively improving the sealing effect and operational stability.

[0029] When lubrication of the guide sleeve 5 is required, the one-way valve at the upper end of the lubrication pipeline 8 is connected through an external oil pipe. Opening the one-way valve allows lubricating oil to enter the lubrication pipeline 8 under pressure. When the oil pressure reaches the set value, it pushes the slider 14 backward, compressing the spring 13 and causing the sealing ball 15 to disengage from the outlet end. The lubricating oil flows evenly into the lubrication groove 9 through the cylindrical oil drain 10, achieving sufficient lubrication of the contact surface between the piston rod 17 and the guide sleeve 5, effectively reducing the coefficient of friction and wear. After stopping the oil injection, the spring 13 returns to its original state, pushing the slider 14 forward, causing the sealing ball 15 to be pressed back against the outlet end, forming a seal and preventing lubricating oil from flowing back into the lubrication pipeline 8. This allows for convenient addition of lubricating oil to the guide sleeve 5 without disassembling it, greatly improving maintenance efficiency and ensuring the long-term stable operation of the hydraulic cylinder 1.

[0030] 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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-acting hydraulic cylinder with an enhanced guide sleeve, comprising a hydraulic cylinder (1), characterized in that: The hydraulic cylinder (1) has a mounting shaft (2) fixedly installed at its front end. The mounting shaft (2) has a positioning groove (3) on its surface. A fixing block (4) is slidably installed on the inner wall of the positioning groove (3). A guide sleeve (5) is fixedly installed on the outer side of the fixing block (4). A first sealing groove is opened on the inner side of the guide sleeve (5). An inner sealing strip (6) is embedded in the first sealing groove. A second sealing groove is opened on the outer side of the guide sleeve (5). An outer sealing strip (7) is embedded in the second sealing groove. A lubrication groove (9) is opened on the inner side of the guide sleeve (5). A lubrication pipeline (8) is fixedly installed inside the fixing block (4). A cylindrical oil drain port (10) is fixedly opened inside the fixing block (4). A fixing groove (11) is opened on the inner wall of the cylindrical oil drain port (10). A piston rod (17) is installed inside the hydraulic cylinder (1).

2. A double-acting hydraulic cylinder with an enhanced guide sleeve according to claim 1, characterized in that: A fixing rod (12) is fixedly installed inside the fixing groove (11). A slider (14) is slidably installed on the outside of the fixing rod (12). A sealing ball (15) is fixedly installed on the outside of the slider (14). A spring (13) is wound around the outside of the fixing rod (12). The two ends of the spring (13) abut against the inner wall of the slider (14) and the fixing groove (11), respectively.

3. A double-acting hydraulic cylinder with an enhanced guide sleeve according to claim 1, characterized in that: The lubrication pipeline (8), the cylindrical oil drain (10) and the lubrication groove (9) are interconnected, and a one-way valve is provided at the upper end of the lubrication pipeline (8).

4. A double-acting hydraulic cylinder with an enhanced guide sleeve according to claim 1, characterized in that: The mounting shaft (2) has an external thread (19) on its outer side. The external thread (19) is connected to a positioning thread cap (20), and a protrusion is fixedly installed on the inner wall of the positioning thread cap (20).

5. A double-acting hydraulic cylinder with an enhanced guide sleeve according to claim 1, characterized in that: A pressure plate (18) is fixedly installed at the front end of the guide sleeve (5), and a limiting plate (21) is fixedly installed on the inner wall of the hydraulic cylinder (1).

6. A double-acting hydraulic cylinder with an enhanced guide sleeve according to claim 1, characterized in that: The front end of the guide sleeve (5) is provided with a dustproof groove, and a dustproof sealing strip (16) is embedded in the dustproof groove.

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