Dustproof sealing device of oil cylinder

Abstract

The utility model relates to the technical field of oil cylinder sealing, in particular to a dustproof sealing device of an oil cylinder. The device comprises a sealing ring body, a scraping ring and a pushing ring, the scraping ring and the pushing ring are arranged on the sealing ring body, the scraping ring is used for abutting against the side wall of a piston rod to scrape hydraulic oil, and the pushing ring is used for abutting against the outer side of the piston rod to scrape dust. When the piston rod extends out, the scraping ring reduces outward leakage of hydraulic oil; when the piston rod retracts, the material pushing ring reduces dust entering hydraulic oil, pollution risks are reduced, abrasion of the sealing ring is reduced, the overall sealing effect is improved, and the service life is prolonged. In addition, the material pushing ring and the sealing ring are detachably connected through an elastic clamping plate and a clamping hook, maintenance and replacement are convenient, and the practicability and reliability of the device are further enhanced.

Description

Technical Field

[0001] This application relates to the field of hydraulic cylinder sealing technology, and in particular to a dustproof sealing device for hydraulic cylinders. Background Technology

[0002] Hydraulic cylinders are key components widely used in modern industry, playing a crucial role, especially in engineering machinery and automobile manufacturing. They convert energy through the reciprocating motion of a piston rod, ensuring the normal operation of mechanical equipment. However, in practical applications, the working environment of hydraulic cylinders is often complex and variable, particularly under extreme conditions such as high temperature, high pressure, and high dust levels, placing higher demands on the sealing performance of the cylinders. Good sealing performance not only ensures the stability of the hydraulic system inside the cylinder but also effectively prevents external impurities from entering, extending the service life of the cylinder and related equipment. Existing cylinder sealing devices are prone to failure in harsh environments such as high temperature, high pressure, and high dust levels, leading to hydraulic oil leakage and the ingress of external dust. This not only affects the normal operation of the cylinder but also accelerates the wear of the seals, shortening their service life. Therefore, there is an urgent need for a more reliable and long-lasting dustproof sealing device to cope with various complex working conditions and ensure the stable operation of the cylinder and its associated equipment. Summary of the Invention

[0003] The purpose of this application is to overcome the above-mentioned technical problems and provide a dustproof sealing device for a hydraulic cylinder.

[0004] A dustproof sealing device for a hydraulic cylinder includes a sealing ring body, with a dustproof sealing assembly located on the outer side of the cylinder body. The dustproof sealing assembly includes a scraper ring and a pusher ring disposed on the sealing ring body. The pusher ring is located outside the scraper ring. The scraper ring abuts against the side wall of the piston rod to scrape down hydraulic oil, while the pusher ring abuts against the outer side of the piston rod to scrape down dust. By adopting this technical solution, during use, when the piston rod extends, the scraper ring scrapes down the hydraulic oil on the piston rod, reducing the amount of hydraulic oil sliding outwards with the piston rod and being exposed to air. When the piston rod retracts inwards, the pusher ring scrapes down the dust on the piston rod, reducing the amount of impurities entering the hydraulic oil with the piston rod, reducing dust and impurities contaminating the hydraulic oil, and simultaneously reducing friction between dust and impurities and the sealing ring body, reducing wear on the sealing ring body, improving the sealing effect of the dustproof sealing device, and extending the service life of the sealing ring. Preferably, the pusher ring is detachably connected to the sealing ring body. By adopting the above technical solution, the pusher ring and the sealing ring are detachably connected during use, facilitating periodic replacement of the pusher ring. Preferably, a slot is provided at the end of the sealing ring body, and two elastic retaining plates are fixedly connected to the end of the pusher ring. The elastic retaining plates are used to engage with the slot. By adopting the above technical solution, the elastic retaining plates are easily inserted into the slot during use, and the tension of the elastic retaining plates presses against the inner wall of the slot, thus fixing the pusher ring and the sealing ring. Preferably, a slot is provided in the slot, and a hook is fixedly connected to the elastic retaining plate located on the outside of the sealing ring body. The hook is used to hook the slot. By adopting the above technical solution, the elastic retaining plate is engaged with the slot during use, and the hook can hook the inner wall of the slot, making the connection between the elastic retaining plate and the slot more stable. Preferably, a sponge ring is provided on the inner wall of the pusher ring. By adopting the above technical solution, the sponge ring can wipe away hydraulic oil or dust during use, ensuring that hydraulic oil does not leak out and reducing dust entering the cylinder. Preferably, the pusher ring has a clamping groove, and the sponge ring is engaged in the clamping groove. By adopting the above technical solution, the user can easily disassemble and install the sponge ring, thus facilitating its periodic replacement. Preferably, the sealing ring body has a Y-shaped sealing port on the side near the inner wall of the cylinder, and a rubber ring 12 is disposed inside the Y-shaped sealing port. By adopting the above technical solution, when the hydraulic cylinder slides outward during use, hydraulic oil enters the Y-shaped sealing port, compressing it and causing deformation. This results in a tighter contact between the two sides of the Y-shaped sealing port and the cylinder body and piston rod, thus improving the sealing effect at the connection between the cylinder body and piston rod. Attached Figure Description

[0005] Figure 1 This is a cross-sectional view of the sealing ring of this application installed on the oil cylinder.

[0006] Figure 2 This is a cross-sectional view of an embodiment of this application.

[0007] Figure 3 yes Figure 2 Enlarged view of part A.

[0008] Reference numerals: 1. Sealing ring body; 11. Y-shaped sealing port; 12. Rubber ring; 13. Scraper ring; 14. Pusher ring; 141. Elastic clamping plate; 142. Hook; 143. Clamping groove; 15. Slot; 151. Slot; 16. Sponge ring; 2. Cylinder body; 3. Piston rod. Detailed Implementation

[0009] The following will be combined with the appendix Figure 1-3 The technical solutions in the embodiments of the present invention are clearly and completely described. The described embodiments are only possible technical implementations of the present invention and not all possible implementations. Those skilled in the art can obtain other embodiments in combination with the embodiments of the present invention without creative effort, and these embodiments are also within the protection scope of the present invention. The embodiments of this application provide a dustproof sealing device for a hydraulic cylinder, including a sealing ring body 1. A dustproof sealing component is provided on the outer side of the sealing ring body 1 located on the cylinder body 2. The dustproof sealing component includes a scraping ring 13 and a pushing ring 14 disposed on the sealing ring body 1. The pushing ring 14 is located outside the scraping ring 13. The scraping ring 13 is used to abut against the side wall of the piston rod 3 to scrape off hydraulic oil, and the pushing ring 14 abuts against the outer side of the piston rod 3 to scrape off dust. When the piston rod 3 extends, the scraper ring 13 scrapes off the hydraulic oil on the piston rod 3, reducing the amount of hydraulic oil that slides out with the piston rod 3 and is exposed to the air. When the piston rod 3 retracts inward, the pusher ring 14 scrapes off the dust on the piston rod 3, reducing the amount of impurities that enter the hydraulic oil with the piston rod 3, reducing the contamination of the hydraulic oil by dust and impurities, and at the same time reducing the friction between dust and impurities and the sealing ring body 1, reducing the wear of the sealing ring body 1, improving the sealing effect of the dustproof sealing device, and extending the service life of the sealing ring.

[0010] Specifically, the sealing ring body 1 can be made of high-temperature and high-pressure resistant rubber materials, such as fluororubber or silicone rubber. These materials have excellent heat resistance and chemical corrosion resistance, making them suitable for extreme working conditions. The scraper ring 13 and pusher ring 14 can be made of stainless steel or aluminum alloy. Both of these materials have high hardness and wear resistance, and can maintain good performance during long-term use.

[0011] The scraper ring 13 is circular in shape, and its inner and outer diameters can be adjusted according to the diameter of the piston rod 3 to ensure maximum contact area with the piston rod 3. The edge of the scraper ring 13 can be designed as a bevel, so that when the piston rod 3 extends, the scraper ring 13 can more easily fit against the piston rod 3, reducing hydraulic oil residue.

[0012] The pusher ring 14 is also annular, and its inner and outer diameters are matched to the diameter of the piston rod 3. The pusher ring 14 is connected to the sealing ring body 1 via a snap-fit ​​structure. A slot 15 is provided at the end of the sealing ring body 1, and two elastic retaining plates 141 are fixedly connected to the end of the pusher ring 14. The elastic retaining plates 141 are used to snap into the slot 15. The design of the elastic retaining plates 141 allows the pusher ring 14 to be easily inserted into the slot 15 of the sealing ring body 1 without the need for complex tools. The tension of the elastic retaining plates 141 will cause them to press tightly against the inner wall of the slot 15, thereby firmly fixing the pusher ring 14 to the sealing ring body 1. This design is both simple and reliable, allowing even non-professionals to easily complete the installation and disassembly operations.

[0013] Furthermore, a slot 151 is provided within the slot 15, and a hook 142 is fixedly connected to the elastic plate 141 located on the outside of the sealing ring body. The hook 142 is used to hook the slot 151. This design increases the connection strength between the push ring 14 and the sealing ring body 1, ensuring that it will not loosen or fall off even under high-intensity working environments. The shape and size of the hook 142 can be adjusted according to actual needs to achieve the best fixing effect.

[0014] The inner wall of the pusher ring 14 is equipped with a sponge ring 16, which can be made of open-cell polyurethane foam. This material has excellent water absorption and adsorption properties, effectively absorbing and capturing liquids and solid particles on the piston rod 3. A clamping groove 143 is formed inside the pusher ring 14, and the sponge ring 16 is snapped into the groove 143. This design allows the sponge ring 16 to be easily disassembled and installed, facilitating periodic replacement. The width and depth of the clamping groove 143 can be adjusted according to the actual size of the sponge ring 16 to ensure a tight fit. The choice of sponge ring 16 is also important. In addition to the aforementioned polyurethane foam, microfiber materials with good hydrophilicity can also be considered, as these materials have stronger liquid absorption capacity and a longer service life.

[0015] The scraper ring 13, pusher ring 14, and sponge ring 16 together constitute the core of the dustproof sealing assembly. When the piston rod 3 extends, the scraper ring 13 first contacts the surface of the piston rod 3, scraping off the hydraulic oil. Then, the pusher ring 14 follows closely, scraping off the remaining trace amounts of hydraulic oil and dust. Finally, the sponge ring 16 assists in cleaning, ensuring that the surface of the piston rod 3 is clean and free of dirt. This multi-layered cleaning mechanism greatly improves the overall efficiency of the dustproof sealing device, reduces the impact of external contaminants on the inside of the cylinder, and also reduces the burden on the sealing ring body 1, extending its service life.

[0016] A Y-shaped sealing port 11 is provided on the side of the sealing ring body 1 near the inner wall of the cylinder 2, and a rubber ring 12 is provided inside the Y-shaped sealing port 11. This design makes full use of the special geometry of the Y-shaped sealing port 11, and automatically adjusts the sealing effect through pressure changes, which greatly improves the sealing performance of the sealing ring body 1.

[0017] The implementation principle of this embodiment is as follows: through reasonable structural design and material selection, effective cleaning of the piston rod 3 is achieved, avoiding the mixing of hydraulic oil and dust, thereby significantly improving the dustproof sealing effect of the cylinder. In particular, the double-layer cleaning mechanism of the scraper ring 13 and the pusher ring 14, coupled with the auxiliary role of the sponge ring 16, enables the entire dustproof sealing device to maintain stable performance even under extreme working conditions, greatly reducing the equipment failure rate caused by seal failure and improving production efficiency and safety.

[0018] By introducing the Y-shaped sealing port 11 and the rubber ring 12, the dynamic sealing effect is automatically adjusted, maintaining good sealing performance whether the cylinder is stationary or in motion. This design not only solves the failure problem of traditional sealing rings under extreme working conditions, but also greatly extends the service life of the sealing rings and improves the reliability and stability of the hydraulic cylinder.

[0019] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dustproof sealing device for a hydraulic cylinder, characterized in that: The system includes a sealing ring body (1), which is located on the outside of the cylinder body (2) and is equipped with a dustproof sealing assembly. The dustproof sealing assembly includes a scraper ring (13) and a pusher ring (14) disposed on the sealing ring body (1). The pusher ring (14) is located outside the scraper ring (13). The scraper ring (13) is used to abut against the side wall of the piston rod (3) to scrape off the hydraulic oil, and the pusher ring (14) abuts against the outside of the piston rod (3) to scrape off the dust.

2. The dustproof sealing device for a hydraulic cylinder according to claim 1, characterized in that: The pusher ring (14) is detachably connected to the sealing ring body (1).

3. The dustproof sealing device for a hydraulic cylinder according to claim 2, characterized in that: The sealing ring body (1) has a slot (15) at its end, and the pusher ring (14) has two elastic plates (141) fixedly connected to its end. The elastic plates (141) are used to engage in the slot (15).

4. The dustproof sealing device for a hydraulic cylinder according to claim 3, characterized in that: A slot (151) is provided in the slot (15), and a hook (142) is fixedly connected to the elastic plate (141) located outside the sealing ring body (1). The hook (142) is used to hook the slot (151).

5. The dustproof sealing device for a hydraulic cylinder according to claim 1, characterized in that: The inner wall of the pusher ring (14) is provided with a sponge ring (16).

6. The dustproof sealing device for a hydraulic cylinder according to claim 1, characterized in that: The pusher ring (14) has a clamping groove (143) inside, and the sponge ring (16) is engaged in the clamping groove (143).

7. The dustproof sealing device for a hydraulic cylinder according to claim 1, characterized in that: The sealing ring body (1) has a Y-shaped sealing port (11) on the side near the inner wall of the cylinder (2), and a rubber ring (12) is provided inside the Y-shaped sealing port (11).

Images