A jack with waterproof sealing structure

Abstract

The utility model discloses a kind of jacks with waterproof sealing structure, comprising: oil bottom cylinder and big oil cylinder, the upper surface of oil bottom cylinder is fixedly installed with water drainage sealing mechanism, the outer surface lower end of big oil cylinder is provided with threaded portion, so that big oil cylinder can be installed in water drainage sealing mechanism by the threaded portion of outer surface thread, so that threaded installation big oil cylinder can be communicated with water drainage sealing mechanism. The application is designed by water drainage sealing mechanism and butyronitrile rubber ring, so that it can ensure that the piston rod that slides into big oil cylinder keeps dryness, and then can avoid the corrosion problem of component caused by moisture, thereby prolong the service life of metal component, and the outer ring ring and inner ring ring in outer ring seat are also provided for big oil cylinder to form stepped sealing structure when sliding into, significantly improve the sealing property of entire sealing structure, can effectively prevent hydraulic oil leakage and moisture, dust and other impurities outside enter jack interior.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic jack technology, specifically a jack with a waterproof sealing structure. Background Technology

[0002] Hydraulic jacks are common lifting devices in industrial production, and the sealing performance of their sealing components is crucial to their proper functioning. Lifting and unloading are accomplished by the up-and-down movement of a piston within the cylinder. The seal between the piston and the cylinder is a dynamic seal, requiring high sealing performance from the sealing components.

[0003] For example, the national authorized patent announcement number CN218290265U discloses a hydraulic jack with a sealing structure, including a cylinder body. A piston is slidably connected inside the cylinder body. The inside of the cylinder body is coated with a double-layer chromium layer, and the surface of the piston is coated with a metallic chromium layer. Double-layer dustproof sealing rings are fixedly connected to both sides of the double-layer chromium layer. A placement groove is formed inside the top wall of the cylinder body, and a guide disc is fixedly connected inside the placement groove. A slot is formed on the inner wall of the guide disc, and a rotating rod is movably connected to the two inner walls of the slot via bearing seats. This hydraulic jack with a sealing structure, through the arrangement of the guide disc and guide wheel, ensures that when the piston moves upward, it passes through the double-layer dustproof sealing ring, preventing leakage of maximum working pressure. The guide wheel then guides the piston's movement, preventing it from deviating and reducing wear on the double-layer dustproof sealing rings.

[0004] However, the aforementioned type of hydraulic jack with a sealed structure cannot filter out the water adhering to the outer surface of the piston rod during the process of pulling the piston rod back into the oil cylinder. When this water enters the oil cylinder, it comes into contact with the hydraulic oil. The additives in the hydraulic oil will react chemically with the water, reducing the performance of the hydraulic oil. Furthermore, it cannot drain the water that has seeped into the oil pan. The water entering the oil pan will emulsify the hydraulic oil. The emulsified hydraulic oil has reduced lubrication performance and changes viscosity, causing it to be unable to transmit pressure normally, thus affecting the jack's lifting capacity and working efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a jack with a waterproof sealing structure to solve the problem mentioned in the background art that the water adhering to the outer surface of the piston rod cannot be filtered out during the process of pulling the piston rod back into the oil cylinder, and the water that has seeped into the oil pan cannot be discharged.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A jack with a waterproof sealing structure includes: a base cylinder and a large cylinder. A hydrophobic sealing mechanism is fixedly installed on the upper surface of the base cylinder. A threaded portion is provided at the lower end of the outer surface of the large cylinder, so that the large cylinder can be threadedly installed in the hydrophobic sealing mechanism through the threaded portion on the outer surface. This allows the threaded large cylinder to communicate with the hydrophobic sealing mechanism, and allows the piston rod slidably installed in the large cylinder to be pushed by the hydraulic oil in the base cylinder and the large cylinder.

[0008] Preferably, a ring frame is fixedly installed on the upper surface of the large oil cylinder, and a conical disc is fixedly installed on both the upper and lower surfaces of the ring frame, with the inner ring surfaces of both sets of conical discs sliding against the outer surface of the piston rod.

[0009] Preferably, a nitrile rubber ring is fixedly installed on the inner ring surface of the ring frame, and the nitrile rubber ring also elastically contacts the outer surface of the piston rod.

[0010] Preferably, the hydrophobic sealing mechanism includes an outer ring seat, in which a large hydraulic cylinder can be threadedly installed. An outer ring and an inner ring are fixedly installed inside the outer ring seat, with the inner ring being higher than the outer ring, so that when the large hydraulic cylinder is threaded into the outer ring seat, it can simultaneously slide onto the outer surfaces of the outer ring and the inner ring.

[0011] Preferably, a sealing ring is fitted on the outer surface of the inner ring, and multiple sets of hydrophobic grooves are formed on the outer surface of the outer ring seat.

[0012] Preferably, a drain outlet is provided inside the outer ring seat, and the drain outlet is connected to the outer periphery of the outer ring and the drain groove, so that water flowing in through the threaded groove in the oil pan cylinder can be discharged through the drain outlet.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The design incorporates a sump cylinder, a large cylinder, a conical disc, a nitrile rubber ring, and a hydrophobic sealing mechanism. During use, the large cylinder is threaded into the hydrophobic sealing mechanism fixed to the upper surface of the sump cylinder. Then, during the piston rod lifting process, hydraulic oil from the sump cylinder is supplied to the large cylinder to lift the piston rod. During the piston rod's movement, the conical disc and nitrile rubber ring remain in contact with the outer surface of the piston rod, allowing moisture or impurities on the outer surface to be blocked and removed by the conical disc or nitrile rubber ring, thus ensuring smooth operation. The piston rod, retracted into the large hydraulic cylinder, has its outer surface thoroughly dried, thus preventing moisture ingress and corrosion. This extends the service life of the metal components, maintains the jack's lifting capacity and working efficiency, and ensures its overall performance and reliability. The large hydraulic cylinder, threaded into the hydrophobic sealing mechanism, has a sealing effect through its threaded connection. Combined with the design of the hydrophobic sealing mechanism, it effectively prevents hydraulic oil leakage and the infiltration of external moisture and impurities into the hydraulic system. This dual sealing effect helps maintain the stability and reliability of the hydraulic system, ensuring the normal working performance of the jack.

[0015] 2. Through the design of the outer ring seat, drainage groove, inner ring, outer ring, and drainage port, the large hydraulic cylinder is installed into the outer ring seat through the threaded part on the outer surface. During this process, the bottom of the large hydraulic cylinder slides into the outer surfaces of the inner and outer rings. The height difference between the inner and outer rings, being greater than that of the inner ring, creates a stepped sealing structure. The inner ring, being higher, contacts the large hydraulic cylinder first, providing an initial seal and preventing the penetration of hydraulic oil, external moisture, and impurities. The outer ring acts as an auxiliary seal, further enhancing the sealing performance and reducing the risk of leakage. Furthermore, because the inner ring is higher than the outer ring, when moisture enters through the threaded groove, it creates a water accumulation space between the inner and outer rings. Multiple drainage ports on one end of the inner ring wall of the threaded groove drain the infiltrated moisture to the outside, preventing moisture accumulation around the large hydraulic cylinder. This avoids moisture corrosion of the large hydraulic cylinder and oil pan cylinder, extending the service life of the jack. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the jack with a waterproof sealing structure according to this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the conical disc and nitrile rubber ring of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the drainage channel of this utility model;

[0019] Figure 4 This is a schematic diagram of the inner and outer rings of this utility model.

[0020] In the diagram: 1. Oil pan cylinder; 101. Large oil cylinder; 102. Ring frame; 103. Conical disc; 104. Nitrile rubber ring; 105. Threaded part; 2. Hydrophobic sealing mechanism; 201. Outer ring seat; 202. Hydrophobic groove; 203. Inner ring; 204. Outer ring; 205. Hydrophobic outlet. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-4 This embodiment provides the following technical solution:

[0023] like Figures 1-2 As shown, a jack with a waterproof sealing structure includes: a base cylinder 1 and a large cylinder 101. A hydrophobic sealing mechanism 2 is fixedly installed on the upper surface of the base cylinder 1. A threaded portion 105 is provided at the lower end of the outer surface of the large cylinder 101, so that the large cylinder 101 can be threaded into the hydrophobic sealing mechanism 2 through the threaded portion 105 on the outer surface. This allows the threaded large cylinder 101 to communicate with the hydrophobic sealing mechanism 2, and allows the piston rod slidably installed in the large cylinder 101 to be pushed by the hydraulic oil in the base cylinder 1 and the large cylinder 101.

[0024] A ring frame 102 is fixedly installed on the upper surface of the large oil cylinder 101. Conical discs 103 are fixedly installed on both the upper and lower surfaces of the ring frame 102. The inner ring surfaces of the two sets of conical discs 103 slide against the outer surface of the piston rod. A nitrile rubber ring 104 is fixedly installed on the inner ring surface of the ring frame 102. The nitrile rubber ring 104 also elastically contacts the outer surface of the piston rod.

[0025] Through the design of the oil pan cylinder 1, large oil cylinder 101, conical disc 103, nitrile rubber ring 104, and hydrophobic sealing mechanism 2, in use, the large oil cylinder 101 can be threaded into the hydrophobic sealing mechanism 2 fixedly installed on the upper surface of the oil pan cylinder 1 via the threaded portion 105 on its outer surface. Subsequently, during the lifting of the piston rod, the hydraulic oil in the oil pan cylinder 1 can be delivered into the large oil cylinder 101 to lift the piston rod. During the lifting and lowering of the piston rod, the conical disc 103 and nitrile rubber ring 104 will always be in contact with the outer surface of the piston rod, thereby allowing moisture or impurities on the outer surface to be removed by the conical disc 103 or nitrile rubber ring 104 while the piston rod is lifting and lowering. 4. The blocking and wiping process allows the outer surface of the piston rod, which slides into the large hydraulic cylinder 101, to be fully dried, thus preventing corrosion caused by moisture ingress. This extends the service life of metal components, maintains the lifting capacity and working efficiency of the jack, and ensures its overall performance and reliability. The large hydraulic cylinder 101, which is threaded into the hydrophobic sealing mechanism 2, has a certain sealing effect through the threaded connection itself. Combined with the design of the hydrophobic sealing mechanism 2, it can effectively prevent hydraulic oil leakage and the infiltration of external moisture and impurities into the hydraulic system. This double sealing effect helps maintain the stability and reliability of the hydraulic system and ensures the normal working performance of the jack.

[0026] like Figures 3-4 As shown, the hydrophobic sealing mechanism 2 includes an outer ring seat 201. The large oil cylinder 101 is threadedly installed inside the outer ring seat 201 through the threaded part 105. An outer ring 204 and an inner ring 203 are fixedly installed inside the outer ring seat 201. The inner ring 203 is higher than the outer ring 204, so that when the large oil cylinder 101 is threaded into the outer ring seat 201, it can slide into the outer surfaces of the outer ring 204 and the inner ring 203 at the same time. A sealing ring is fitted on the outer surface of the inner ring 203. Multiple sets of hydrophobic grooves 202 are opened on the outer surface of the outer ring seat 201. A hydrophobic port 205 is opened inside the outer ring seat 201. The hydrophobic port 205 is connected to the periphery of the outer ring 204 and the hydrophobic grooves 202, so that water flowing in through the threaded grooves in the oil pan cylinder 1 can be discharged through the hydrophobic port 205.

[0027] Through the design of the outer ring seat 201, the drainage groove 202, the inner ring 203, the outer ring 204, and the drainage port 205, during the process of the large hydraulic cylinder 101 being threaded into the outer ring seat 201 through the threaded part 105 on its outer surface, the bottom of the large hydraulic cylinder 101 slides into the outer surfaces of the inner ring 203 and the outer ring 204. Because the inner ring 203 is higher than the outer ring 204, this height difference forms a stepped sealing structure. The inner ring 203, being higher, can contact the large hydraulic cylinder 101 first, providing an initial seal and blocking hydraulic oil. The outer ring 204 acts as an auxiliary seal to prevent the penetration of external moisture and impurities, further enhancing the sealing performance and reducing the risk of leakage. Since the inner ring 203 is higher than the outer ring 204, when moisture enters through the threaded groove, it will form a water accumulation space between the inner ring 203 and the outer ring 204. The multiple sets of drainage ports 205 provided at one end of the inner ring wall of the threaded groove can drain the infiltrated moisture to the outside, preventing moisture from accumulating around the large oil cylinder 101. This avoids moisture from corroding the large oil cylinder 101 and the oil pan cylinder 1, and extends the service life of the jack.

[0028] Based on the above technical solution, the working steps of this solution are summarized as follows: In use, the large hydraulic cylinder 101 is threaded into the threaded groove of the outer ring seat 201 fixed on the upper surface of the oil pan cylinder 1 via the threaded portion 105 on its outer surface. During the process of threading the large hydraulic cylinder 101 into the outer ring seat 201, the bottom of the large hydraulic cylinder 101 slides into the outer surfaces of the inner ring 203 and outer ring 204 installed in the outer ring seat 201. Because the inner ring 203 is higher than the outer ring 204, this height difference forms a stepped sealing structure. The inner ring 203, being higher, contacts the large hydraulic cylinder 101 first, providing an initial seal and preventing the penetration of hydraulic oil and external moisture and impurities. The outer ring 204 serves as an auxiliary seal, further enhancing the sealing. The sealing performance reduces the risk of leakage. When moisture enters through the threaded groove, it creates a water accumulation space between the threaded groove and the outer ring 204. Multiple sets of drainage ports 205 at one end of the inner ring wall of the threaded groove can drain the infiltrated moisture to the outside, preventing moisture from accumulating around the large oil cylinder 101 and thus avoiding moisture from corroding the large oil cylinder 101 and oil pan cylinder 1. Subsequently, during the lifting and lowering of the piston rod, the cone plate 103 and nitrile rubber ring 104 mounted on the upper surface of the large oil cylinder 101 will always be in contact with the outer surface of the piston rod. This allows the moisture or impurities on the outer surface to be blocked and wiped away by the cone plate 103 or nitrile rubber ring 104 while the piston rod is lifting and lowering, thus allowing the outer surface of the piston rod that has slid into the large oil cylinder 101 to dry thoroughly.

[0029] In summary, this jack ensures that the piston rod, which slides into the large hydraulic cylinder 101, remains dry, thus preventing corrosion caused by moisture and extending the service life of metal components. Furthermore, the outer ring 204 and inner ring 203 within the outer ring seat 201, forming a stepped sealing structure for the large hydraulic cylinder 101 to slide into, significantly improve the overall sealing performance and effectively prevent hydraulic oil leakage and the entry of external moisture, dust, and other impurities into the jack.

[0030] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model 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 this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A jack with a waterproof sealing structure, characterized in that, include: The oil pan cylinder (1) and the large oil cylinder (101) are provided. A hydrophobic sealing mechanism (2) is fixedly installed on the upper surface of the oil pan cylinder (1). A threaded part (105) is provided at the lower end of the outer surface of the large oil cylinder (101). This allows the large oil cylinder (101) to be threaded into the hydrophobic sealing mechanism (2) through the threaded part (105) on the outer surface. This allows the threaded large oil cylinder (101) to be connected to the hydrophobic sealing mechanism (2), and allows the piston rod that is slidably installed in the large oil cylinder (101) to be pushed by the hydraulic oil in the oil pan cylinder (1) and the large oil cylinder (101).

2. The jack with a waterproof sealing structure according to claim 1, characterized in that: A ring frame (102) is fixedly installed on the upper surface of the large oil cylinder (101). A conical disc (103) is fixedly installed on both the upper and lower surfaces of the ring frame (102). The inner ring surfaces of the two sets of conical discs (103) slide against the outer surface of the piston rod.

3. A jack with a waterproof sealing structure according to claim 2, characterized in that: A nitrile rubber ring (104) is fixedly installed on the inner ring surface of the ring frame (102), and the nitrile rubber ring (104) is elastically and plastically contacting the outer surface of the piston rod.

4. A jack with a waterproof sealing structure according to claim 1, characterized in that: The hydrophobic sealing mechanism (2) includes an outer ring seat (201), in which a large hydraulic cylinder (101) can be threadedly installed via a threaded portion (105). An outer ring (204) and an inner ring (203) are fixedly installed inside the outer ring seat (201). The inner ring (203) is higher than the outer ring (204), so that when the large hydraulic cylinder (101) is threadedly installed into the outer ring seat (201), it can simultaneously slide onto the outer surfaces of the outer ring (204) and the inner ring (203).

5. A jack with a waterproof sealing structure according to claim 4, characterized in that: The outer surface of the inner ring (203) is fitted with a sealing ring, and the outer surface of the outer ring seat (201) is provided with multiple sets of drainage grooves (202).

6. A jack with a waterproof sealing structure according to claim 4, characterized in that: The outer ring seat (201) is provided with a drain port (205), which is connected to the outer periphery of the outer ring (204) and the drain groove (202) so that water flowing in through the threaded groove in the oil pan cylinder (1) can be discharged through the drain port (205).

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