Pull rod type hydraulic oil cylinder

Abstract

The utility model provides a pull rod type hydraulic oil cylinder, which relates to the technical field of hydraulic oil cylinders and comprises an oil cylinder body. According to the device, under the interaction of all the components of the device, the two protection boxes are used for providing stable basic protection for the hydraulic oil cylinder, then the dustproof ring effectively prevents external dust from entering, the sealing ring ensures the sealing performance and prevents external liquid or gas from entering, the two adjusting screw rods are rotated to enable the dust scraping ring to be tightly attached to the piston rod, and therefore the hydraulic oil cylinder is prevented from being scraped. When the dustproof ring loses efficacy due to abrasion or looseness, the dust scraping ring can continuously and effectively scrape impurities on the piston rod, meanwhile, by means of elastic supporting of the two sets of springs, when the dust scraping ring deviates due to abrasion or deformation, the elastic restoring force of the springs can enable the dust scraping ring to reset rapidly, it is guaranteed that the dust scraping function is continuous and effective, and therefore the service life of the hydraulic oil cylinder is remarkably prolonged, and the service life of the hydraulic oil cylinder is prolonged. In addition, the design of the two protection boxes is convenient to disassemble and assemble, and maintenance and replacement work of the dustproof ring, the sealing ring and the dust scraping ring are greatly facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a pull-rod type hydraulic cylinder. Background Art

[0002] The pull-rod type hydraulic cylinder is an industrial power transmission device based on the principle of liquid mechanics. Its working principle is to generate thrust or pull force inside the cylinder through liquid pressure, and then drive the piston and pull rod to move, realizing the transmission of force and action control. The pull-rod type hydraulic cylinder has strong load-bearing capacity, stable operating performance and durable service life, and can cope with various heavy-load working environments. Its main structure includes a cylinder, a piston and a piston rod, and a precise hydraulic system ensures the smooth transmission of fluid and reliable working effect.

[0003] A dust-proof ring is usually installed at the sealing part between the piston rod and the cylinder head of the pull-rod type hydraulic cylinder to effectively block the intrusion of external dust, impurities, etc. into the cylinder, and ensure the normal operation and service life of the cylinder. However, the pull-rod type hydraulic cylinder is often used in harsh working environments, such as dusty construction sites, high-temperature and high-humidity chemical workshops, etc. Such an environment will cause the dust-proof ring to bear huge pressure, resulting in easy wear, aging or even failure of the dust-proof ring, and then impurities will invade the cylinder, reducing the service life of the hydraulic cylinder. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem that when the above equipment is in use, due to the easy wear and aging of the internal dust-proof ring of the pull-rod type hydraulic cylinder in a harsh working environment, impurities invade the cylinder, resulting in the reduction of the service life of the cylinder, and thus a pull-rod type hydraulic cylinder is proposed.

[0005] To achieve the above object, the present utility model adopts the following technical solution: A pull-rod type hydraulic cylinder, including a cylinder body, two sets of threaded grooves are opened at the top of the cylinder body, the inner walls of the two sets of threaded grooves are both threadedly connected with fixing bolts, fixing plates are movably sleeved on the outer walls of the two fixing bolts, a protective box is fixedly connected between one sides of the outer walls of the two fixing plates, two clamping blocks are fixedly connected to one side of the outer wall of one of the two protective boxes, two clamping grooves are opened on one side of the outer wall of the other of the two protective boxes, a set of first embedding grooves are opened on one side of the outer walls of the two protective boxes, a sealing ring is movably inserted between the inner walls of one set of the two sets of first embedding grooves, a dust-proof ring is movably inserted between the inner walls of the other set of the two sets of first embedding grooves, adjusting screws are threadedly connected to the inner walls of the two protective boxes, bearings are fixedly sleeved on the outer walls of the two adjusting screws, moving frames are fixedly sleeved on the outer walls of the two bearings, a set of first sliding grooves are opened on the inner walls of the two protective boxes, first sliders are slidably embedded in the inner walls of the two sets of first sliding grooves, and the outer walls of the two moving frames are fixedly connected to one sides of the outer walls of the two sets of first sliders, a set of springs are fixedly connected between the outer walls of the two sets of springs, and a mounting plate is fixedly connected between the outer walls of the two sets of springs.

[0006] Preferably, a set of second sliding grooves are opened on the inner walls of the two moving frames, second sliders are slidably embedded in the inner walls of the two sets of second sliding grooves, the outer walls of the two mounting plates are fixedly connected to one sides of the outer walls of the two sets of second sliders, second embedding grooves are opened on the outer walls of the two mounting plates, and a dust scraping ring is movably inserted between the inner walls of the two second embedding grooves.

[0007] Preferably, a heat conducting plate is fixedly sleeved on the outer wall of the cylinder body, and a spiral condensing pipe is fixedly connected to the outer wall of the heat conducting plate.

[0008] Preferably, a water pump is fixedly communicated with the input end of the spiral condensing pipe.

[0009] Preferably, a water inlet pipe is fixedly communicated with the input end of the water pump.

[0010] Preferably, a drain pipe is fixedly communicated with the output end of the spiral condensing pipe.

[0011] Preferably, a protective cover is fixedly connected to the outer wall of the spiral condensing pipe.

[0012] Compared with the prior art, the advantages and positive effects of the present utility model are as follows.

[0013] In this utility model, through the interaction of the components of the device, two protective boxes are used to provide a stable basic protection for the hydraulic cylinder. Subsequently, the dust-proof ring effectively blocks the entry of external dust, and the sealing ring ensures the sealing performance to prevent the entry of external liquids or gases. By rotating two adjusting screws, the dust scraping ring is closely attached to the piston rod. When the dust-proof ring fails due to wear or loosening, the dust scraping ring can continue to effectively scrape impurities on the piston rod. At the same time, with the elastic support of two groups of springs, when the dust scraping ring deviates due to wear or deformation, the elastic restoring force of the spring can quickly reset it to ensure the continuous effectiveness of the dust scraping function, thereby significantly extending the service life of the hydraulic cylinder. In addition, the design of the two protective boxes facilitates disassembly and assembly, greatly facilitating the maintenance and replacement of the dust-proof ring, sealing ring and dust scraping ring.

[0014] In this utility model, through the interaction of the components of the device, heat generated during the operation of the hydraulic cylinder is effectively absorbed by means of heat conduction. Subsequently, through the circulating flow of cooling water in the spiral condensing pipe, the heat is taken away, effectively preventing the hydraulic cylinder from being damaged due to overheating, thereby ensuring its stable and efficient operation. Description of the Drawings

[0015] Figure 1 is the front view structural three-dimensional diagram of a pull-rod type hydraulic cylinder proposed by this utility model;

[0016] Figure 2 is the partial structure top view three-dimensional exploded view of a pull-rod type hydraulic cylinder proposed by this utility model;

[0017] Figure 3 is the partial structure side view three-dimensional exploded view of a pull-rod type hydraulic cylinder proposed by this utility model;

[0018] Figure 4 is the partial structure sectional view three-dimensional exploded view of a pull-rod type hydraulic cylinder proposed by this utility model;

[0019] Figure 5 is the partial structure three-dimensional exploded view of a pull-rod type hydraulic cylinder proposed by this utility model.

[0020] Legend Explanation:

[0021] 1. Cylinder body; 2. Thread groove; 3. Fixed bolt; 4. Fixed plate; 5. Protective box; 6. Block; 7. Slot; 8. First embedding groove; 9. Sealing ring; 10. Dust-proof ring; 11. Adjusting screw; 12. Bearing; 13. Moving frame; 14. First chute; 15. First slider; 16. Spring; 17. Mounting plate; 18. Second chute; 19. Second slider; 20. Second embedding groove; 21. Dust scraping ring; 22. Heat conducting plate; 23. Spiral condensing pipe; 24. Water pump; 25. Water inlet pipe; 26. Drain pipe; 27. Protective cover. Detailed implementation manners

[0022] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the following further describes the present utility model in conjunction with the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0023] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the limitations of the specific embodiments disclosed in the following specification.

[0024] Embodiment 1, as Figures 1-5 shown, the present utility model provides a pull-rod type hydraulic cylinder, including a cylinder body 1. Two groups of threaded grooves 2 are opened at the top of the cylinder body 1. Fixed bolts 3 are threadedly connected to the inner surfaces of the two groups of threaded grooves 2. Fixing plates 4 are movably sleeved on the outer surfaces of the two groups of fixed bolts 3. A protective box 5 is fixedly connected between one sides of the outer walls of the two groups of fixing plates 4. Two clamping blocks 6 are fixedly connected to one side of the outer wall of one of the two protective boxes 5. Two clamping grooves 7 are opened on one side of the outer wall of the other of the two protective boxes 5. A group of first embedding grooves 8 are opened on one side of the outer walls of the two protective boxes 5. A sealing ring 9 is movably inserted between the inner surfaces of one group of the two groups of first embedding grooves 8. A dust-proof ring 10 is movably inserted between the inner surfaces of the other group of the two groups of first embedding grooves 8. Adjusting screws 11 are threadedly connected to the inner surfaces of the two protective boxes 5. Bearings 12 are fixedly sleeved on the outer surfaces of the two adjusting screws 11. Moving frames 13 are fixedly sleeved on the outer surfaces of the two bearings 12. A group of first sliding grooves 14 are opened on the inner surfaces of the two protective boxes 5. First sliders 15 are slidably embedded in the inner surfaces of the two groups of first sliding grooves 14. The outer surfaces of the two moving frames 13 are fixedly connected to one sides of the outer walls of the two groups of first sliders 15. A group of springs 16 are fixedly connected to one side of the outer walls of the two moving frames 13. An installation plate 17 is fixedly connected between the outer surfaces of the two groups of springs 16.

[0025] The effects achieved by the entire Embodiment 1 are as follows. First, through the two protective boxes 5, the internal mechanical components and sealing components can be protected from the external environment. The inner walls of the two first embedding grooves 8 are respectively movably inserted with a sealing ring 9 and a dust-proof ring 10. The dust-proof ring 10 can effectively block the entry of external dust and impurities, thereby reducing the pollution risk of the hydraulic system. The sealing ring 9 is responsible for sealing the gap between the two protective boxes 5 and the piston rod, preventing the entry of liquid or gas, and ensuring the sealing performance of the system. By rotating the two adjusting screws 11, the two mounting plates 17 can be driven to move towards the piston rod, so that the dust scraping ring 21 closely fits the surface of the piston rod, thereby further removing the residual dirt on the piston rod. During this process, the two groups of springs 16 are decompressed and compressed to a certain extent, providing an adaptive pre-tightening force for the dust scraping ring 21. When the dust scraping ring 21 is worn due to long-term use, under the elastic recovery effect of the two groups of springs 16, the dust scraping ring 21 can automatically adjust its position and continue to closely fit the piston rod to ensure that the protection effect is not affected. In addition, by loosening the two groups of fixing bolts 3, the two clamping blocks 6 can be easily slid out from the corresponding clamping grooves 7, realizing the separation of the two protective boxes 5. This design greatly facilitates the replacement and maintenance of the sealing ring 9, the dust-proof ring 10, and the dust scraping ring 21.

[0026] Embodiment 2, as Figures 2-5 shown, a set of second sliding grooves 18 are formed on the inner walls of the two moving frames 13. The inner walls of the two groups of second sliding grooves 18 are both slidably embedded with second sliding blocks 19, and the outer walls of the two mounting plates 17 are fixedly connected to one side of the outer walls of the two groups of second sliding blocks 19. Second embedding grooves 20 are formed on the outer walls of the two mounting plates 17, and a dust scraping ring 21 is movably inserted between the inner walls of the two second embedding grooves 20. A heat conducting plate 22 is fixedly sleeved on the outer wall of the oil cylinder body 1. A spiral condensing pipe 23 is fixedly connected to the outer wall of the heat conducting plate 22. The input end of the spiral condensing pipe 23 is fixedly communicated with a water pump 24. The input end of the water pump 24 is fixedly communicated with a water inlet pipe 25. The output end of the spiral condensing pipe 23 is fixedly communicated with a drain pipe 26. A protective cover 27 is fixedly connected to the outer wall of the spiral condensing pipe 23.

[0027] The effects achieved by the entire Embodiment 2 are as follows. First, connect the water inlet pipe 25 to an external cooling water tank or cooling system such as a cooling pond, a cooling tower, etc. to ensure a stable supply of cooling water source. At the same time, connect the output end of the drain pipe 26 to a drainage system or a recovery tank so as to discharge or recycle the used cooling water. Subsequently, start the water pump 24. The water pump 24 pumps out the cooling water from the outside and pressurizes this water so that it can overcome the flow resistance and smoothly flow into the spiral condensation pipe 23. The design of the spiral condensation pipe 23 enables the water flow to form a spiral flow inside it, thereby increasing the contact area between the water and the surrounding environment and improving the heat exchange efficiency. During this process, the heat conduction plate 22 plays a key role. The heat conduction plate 22 absorbs the heat inside the oil cylinder body 1 through heat conduction. When the oil cylinder body 1 generates heat due to work, this heat will be conducted to the heat conduction plate 22 in contact with it. At the same time, when the cooling water flows in the spiral condensation pipe 23, it will take away the heat absorbed by the heat conduction plate 22, thus realizing the transfer and dissipation of heat. This heat transfer process ensures that the oil cylinder body 1 can be maintained within a relatively low and stable temperature range, preventing performance degradation or damage caused by overheating.

[0028] Working principle: During the operation of the oil cylinder body 1, the primary function of the two protective boxes 5 at its top is to provide a basic protective barrier against dust, impurities, and other potential pollution sources in the external environment. The design of the two groups of first embedded grooves 8 allows for the flexible installation of the sealing ring 9 and the dust-proof ring 10. The dust-proof ring 10 effectively blocks the entry of external dust, significantly reducing the risk of internal pollution of the oil cylinder. The sealing ring 9 ensures the sealing between the two protective boxes 5 and the oil cylinder body 1, preventing liquid or gas leakage. By rotating the two adjusting screws 11, since the inner walls of the two protective boxes 5 are threadedly connected to the outer walls of the two adjusting screws 11, rotating the two adjusting screws 11 causes the two moving frames 13 to move towards each other, thereby making the dust scraping ring 21 closely adhere to the surface of the piston rod. Moreover, the movement of the two moving frames 13 will respectively compress the two groups of springs 16. This design ensures that when the dust-proof ring 10 may lose some of its protective effectiveness due to wear, the dust scraping ring 21 can serve as a supplement to effectively remove the residues on the piston rod and keep it clean. Even if the dust scraping ring 21 wears out, the elastic restoring force of the two groups of springs 16 can ensure the continuity of the dust-proof effect and maintain a clean environment inside the oil cylinder. When the oil cylinder body 1 overheats due to the working load, at this time, the staff first connects the water inlet pipe 25 to an external cooling water source, and the drain pipe 26 is responsible for discharging the used cooling water to a suitable treatment or recycling system. The heat conduction plate 22 uses the principle of heat conduction to efficiently transfer the heat inside the oil cylinder body 1 to the spiral condensation pipe 23, which is made of a high thermal conductivity copper material to maximize the heat exchange efficiency. The water pump 24 is based on the principle of fluid dynamics. By rotating the impeller to generate negative pressure to suck in external cooling water and using the pressure boosting mechanism inside the pump body, the cooling water is pressurized and sent into the spiral condensation pipe 23. Inside the spiral condensation pipe 23, the cooling water exchanges heat with the heat conduction plate 22, taking away the absorbed heat, and then is discharged through the drain pipe 26, thereby realizing the effective cooling of the oil cylinder body 1, ensuring its stable operation and extending its service life.

[0029] The above description is only a preferred embodiment of the present invention and is not a limitation to the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A tie rod type hydraulic cylinder, comprising a cylinder body (1), characterized in that: The top of the oil cylinder body (1) is provided with two groups of threaded grooves (2), the inner surfaces of the two groups of threaded grooves (2) are both threadedly connected with fixing bolts (3), the outer surfaces of the two groups of fixing bolts (3) are both movably sleeved with fixing plates (4), a protection box (5) is fixedly connected between the outer walls of the two groups of fixing plates (4), one side of the outer wall of one of the two protection boxes (5) is fixedly connected with two clamping blocks (6), one side of the outer wall of the other of the two protection boxes (5) is provided with two clamping grooves (7), one side of the outer wall of the two protection boxes (5) is provided with a group of first embedding grooves (8), a sealing ring (9) is movably inserted between the inner surfaces of one of the two groups of the first embedding grooves (8), and the inner surface of the other of the two groups of the first embedding grooves (8) is provided with a sealing ring (9). A dust ring (10) is movably inserted between the walls, the inner walls of the two protective boxes (5) are threadedly connected with an adjusting screw (11), the outer walls of the two adjusting screws (11) are fixedly sleeved with a bearing (12), the outer walls of the two bearings (12) are fixedly sleeved with a moving frame (13), the inner walls of the two protective boxes (5) are provided with a group of first sliding grooves (14), the inner walls of the two groups of the first sliding grooves (14) are slidably embedded with a first sliding block (15), and the outer walls of the two moving frames (13) are fixedly connected to one side of the outer wall of the two groups of the first sliding blocks (15), the outer walls of the two moving frames (13) are fixedly connected to one side of the outer wall, and a mounting plate (17) is fixedly connected between the outer walls of the two groups of the springs (16).

2. A tie rod type hydraulic cylinder according to claim 1, characterized in that: A group of second slide grooves (18) are provided on the inner surface walls of the two movable frames (13), and second sliders (19) are slidably embedded in the inner surface walls of the two groups of the second slide grooves (18), and the outer surface walls of the two mounting plates (17) are fixedly connected to one side of the outer wall of the two groups of the second sliders (19), and the outer surface walls of the two mounting plates (17) are provided with second embedding grooves (20), and a dust scraping ring (21) is movably inserted between the inner surface walls of the two second embedding grooves (20).

3. A tie rod type hydraulic cylinder according to claim 2, characterized in that: A heat conducting plate (22) is fixedly sleeved on the outer wall of the oil cylinder body (1), and a spiral condensing tube (23) is fixedly connected to the outer wall of the heat conducting plate (22).

4. A tie rod type hydraulic cylinder according to claim 3, characterized in that: The input end of the spiral condenser tube (23) is fixedly connected to a water pump (24).

5. A tie rod type hydraulic cylinder according to claim 4, characterized in that: The input end of the water pump (24) is fixedly connected to a water inlet pipe (25).

6. A tie rod type hydraulic cylinder according to claim 5, characterized in that: The output end of the spiral condenser tube (23) is fixedly connected to the drain pipe (26).

7. A tie rod type hydraulic cylinder according to claim 6, characterized in that: A protective cover (27) is fixedly connected to the outer wall of the spiral condenser tube (23).

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