Sealing structure of hydraulic piston seat

Abstract

The utility model discloses a sealing structure of a hydraulic piston seat, and relates to a hydraulic oil cylinder. A sealing structure of a hydraulic piston seat comprises a hydraulic cylinder, a cylinder cover is arranged at the upper end of the hydraulic cylinder, the piston seat is arranged in the hydraulic cylinder, a piston rod is arranged at the upper end of the piston seat, a wear-resisting ring is arranged on the surface of the piston seat, and sealing rings are arranged on the portions, located on the upper side and the lower side of the wear-resisting ring, of the surface of the piston seat. A first dustproof semi-ring and a second dustproof semi-ring are arranged at the upper end of the cylinder cover, lapping pieces are arranged at the two ends of the first dustproof semi-ring and the two ends of the second dustproof semi-ring, a mounting groove is formed in the position, located on the edge of the piston rod, of the upper end of the piston seat, a shock pad is arranged in the mounting groove, and a cavity is formed in the shock pad. The sealing performance of the sealing seat can be improved, abrasion to the sealing seat is reduced, the sealing seat is convenient to disassemble, and the service life of equipment can be prolonged.

Description

Technical Field

[0001] The utility model relates to a hydraulic oil cylinder, in particular to a sealing structure of a hydraulic piston seat. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating or swinging motion. The hydraulic piston seat is an important part of the hydraulic cylinder. When working, the hydraulic system pushes the hydraulic piston seat outward through pressure, and its effective working area directly affects the force and movement speed of the hydraulic cylinder. There are many forms of connection between the piston seat and the piston rod, and the commonly used ones are the snap ring type, the sleeve type and the nut type.

[0003] CN211009377U discloses a piston seat, including a piston, a piston rod and a guide rod, wherein the piston rod is fixedly connected to the center position of the upper end surface of the piston, the piston is connected to the lower side of the outer wall of the guide rod, and the piston rod is sleeved on the upper side of the outer wall, the axial centers of the piston, the piston rod and the guide rod are collinear, the piston includes a piston body inside, a cooling chamber is arranged inside the piston body, the piston rod includes a first rod block and a second rod block inside, a water outlet chamber is arranged inside the first rod block, and a water inlet chamber is arranged inside the second rod block. The piston seat of this structure can effectively reduce the working temperature of the piston seat and prevent the piston seat from being deformed by heat, but after long-term use, it is easily affected by various factors, resulting in a decrease in the sealing performance of the hydraulic piston seat, thereby affecting the normal use of the hydraulic oil cylinder and reducing the service life of the hydraulic oil cylinder and the hydraulic piston seat.

[0004] In order to solve the above-mentioned defects in the prior art, a sealing structure of a hydraulic piston seat with a new structure is developed. Utility Model Content

[0005] The utility model aims to provide a sealing structure of a hydraulic piston seat, so as to solve the problem that the sealing performance of the existing hydraulic piston seat is easily degraded, thereby affecting the service life of the hydraulic oil cylinder.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A sealing structure of a hydraulic piston seat comprises a hydraulic cylinder, a cylinder cover is provided at the upper end of the hydraulic cylinder, a piston seat is provided inside the hydraulic cylinder, a piston rod is provided at the upper end of the piston seat, a wear-resistant ring is provided on the surface of the piston seat, sealing rings are provided on the surface of the piston seat on the upper and lower sides of the wear-resistant ring, a dustproof half ring 1 and a dustproof half ring 2 are provided at the upper end of the cylinder cover, and straps are provided at both ends of the dustproof half ring 1 and the dustproof half ring 2, an installation groove is provided at the upper end of the piston seat at the side of the piston rod, a shock-absorbing pad is provided inside the installation groove, and a cavity is provided inside the shock-absorbing pad.

[0008] Furthermore, the hydraulic cylinder is slidably connected to the piston seat, and the sealing ring is made of silicone rubber.

[0009] The inner surface of the cylinder head is provided with a same wear-resistant ring, and the inner surface of the cylinder head is provided with a same sealing ring on the upper side of the wear-resistant ring.

[0010] The first dustproof half ring and the second dustproof half ring are both fitted with the piston rod, and the upper end of the piston rod extends to the outside of the cylinder cover and is slidably connected with the cylinder cover.

[0011] The first dustproof half ring and the second dustproof half ring are adapted to each other, and both the first dustproof half ring and the second dustproof half ring are connected to the cylinder cover by bolts.

[0012] The installation groove and the shock-absorbing pad are both designed in an annular structure, and the cross section of the cavity is designed in a special-shaped structure.

[0013] The sealing ring of the utility model is made of silicone rubber, which has good heat resistance and cold resistance, will not degrade, deform or harden in a high temperature environment, and is acid-resistant, alkali-resistant, oil-resistant and wear-resistant, avoiding the disadvantage of aging of the sealing ring caused by the high temperature environment generated when the hydraulic cylinder is working. At the same time, the wear-resistant ring can effectively prevent the leakage of the mechanical seal, which is conducive to improving the sealing of the piston seat and optimizing the comprehensive performance of the sealing ring; the dustproof half ring one and the dustproof half ring two are both fitted with the piston rod, which is convenient for blocking the dust and impurities scraped off the surface of the piston rod, and after the dustproof half ring one and the dustproof half ring two are worn out after long-term use, they are convenient to disassemble and replace, preventing dust and impurities from entering the interior of the hydraulic cylinder, causing wear of the piston seat and other structural parts, which is conducive to maintaining the sealing performance of the piston seat. During operation, when the piston seat approaches the cylinder head, flexible contact is completed through the shock-absorbing pad, relieving the collision and friction between the piston seat and the cylinder head, and cooperating with optimizing the sealing ring material and setting the dustproof component, it is convenient to improve the sealing structure of the piston seat from multiple directions, which is conducive to extending the service life of the piston seat and the hydraulic cylinder.

[0014] Compared with the prior art, the utility model can improve the sealing performance of the sealing seat, reduce the wear on the sealing seat, facilitate disassembly, and prolong the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 The structure of the utility model is shown in FIG. Figure 1 ;

[0017] Figure 3 The structure of the utility model is shown in FIG. Figure 2 .

[0018] In the figure: 1. hydraulic cylinder; 2. cylinder head; 3. piston seat; 4. piston rod; 5. wear-resistant ring; 6. sealing ring; 7. dustproof half ring 1; 8. dustproof half ring 2; 9. lap; 10. mounting groove; 11. shock-absorbing pad; 12. cavity; 13. bolt. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figure 1-3 The sealing structure of a hydraulic piston seat shown in the figure comprises a hydraulic cylinder 1, a cylinder cover 2 is arranged at the upper end of the hydraulic cylinder 1, a piston seat 3 is arranged inside the hydraulic cylinder 1, a piston rod 4 is arranged at the upper end of the piston seat 3, a wear-resistant ring 5 is arranged on the surface of the piston seat 3, and sealing rings 6 are arranged on the upper and lower sides of the wear-resistant ring 5 on the surface of the piston seat 3, the hydraulic cylinder 1 is slidably connected with the piston seat 3, the sealing ring 6 is made of silicone rubber, the inner surface of the cylinder cover 2 is provided with the same wear-resistant ring 5, and the inner surface of the cylinder cover 2 is provided with the same sealing ring 6 on the upper side of the wear-resistant ring 5. The sealing ring 6 is made of silicone rubber, which has good heat resistance and cold resistance, will not degenerate, deform or harden in a high temperature environment, and is acid-resistant, alkali-resistant, oil-resistant and wear-resistant, so as to avoid the high temperature environment generated when the hydraulic oil cylinder is working, which causes the sealing ring 6 to accelerate aging. At the same time, the wear-resistant ring 5 can be used to effectively prevent the leakage of the mechanical seal, which is beneficial to improve the sealing performance of the piston seat 3 and optimize the comprehensive performance of the sealing ring 6;

[0021] A dustproof half ring 1 7 and a dustproof half ring 2 8 are provided at the upper end of the cylinder cover 2, and both ends of the dustproof half ring 1 7 and the dustproof half ring 2 8 are provided with a strap 9, and the dustproof half ring 1 7 and the dustproof half ring 2 8 are both fitted with the piston rod 4, and the upper end of the piston rod 4 extends to the outside of the cylinder cover 2 and is slidably connected with the cylinder cover 2, and the dustproof half ring 1 7 and the dustproof half ring 2 8 are adapted to each other, and the dustproof half ring 1 7 and the dustproof half ring 2 8 are both connected to the cylinder cover 2 by bolts 13, and the dustproof half ring 1 7 and the dustproof half ring 2 8 are both fitted with the piston rod 4, so as to block the dust and impurities scraped off the surface of the piston rod 4, and after the dustproof half ring 1 7 and the dustproof half ring 2 8 are worn out after long-term use, it is convenient to disassemble and replace them, so as to prevent dust and impurities from entering the interior of the hydraulic cylinder 1 and causing wear of the piston seat 3 and other structural parts, which is conducive to maintaining the sealing performance of the piston seat 3;

[0022] The upper end of the piston seat 3 is located on the side of the piston rod 4 and is provided with an installation groove 10. A shock-absorbing pad 11 is provided inside the installation groove 10. A cavity 12 is provided inside the shock-absorbing pad 11. The installation groove 10 and the shock-absorbing pad 11 are both designed in an annular structure, and the cross-section of the cavity 12 is designed in a special-shaped structure. When the piston seat 3 approaches the cylinder head 2, flexible contact is achieved through the shock-absorbing pad 11 to alleviate the collision and friction between the piston seat 3 and the cylinder head 2. In addition, by optimizing the material of the sealing ring 6 and setting a dust-proof component, it is convenient to improve the sealing structure of the piston seat 3 from multiple directions, which is beneficial to extending the service life of the piston seat 3 and the hydraulic cylinder.

[0023] When working, the sealing ring 6 is made of silicone rubber, which has good heat resistance and cold resistance. It will not degrade, deform or harden in a high temperature environment. At the same time, it is resistant to acid, alkali, oil and wear, so as to avoid the high temperature environment generated when the hydraulic cylinder is working, which will cause the sealing ring 6 to accelerate aging. At the same time, the wear-resistant ring 5 can be used to effectively prevent leakage of the mechanical seal. The dustproof half ring 1 7 and the dustproof half ring 2 8 are both fitted with the piston rod 4 to block dust and impurities scraped off the surface of the piston rod 4. After the dustproof half ring 1 7 and the dustproof half ring 2 8 are worn out after long-term use, they are convenient to disassemble and replace, so as to prevent dust and impurities from entering the interior of the hydraulic cylinder 1 and causing wear of structural parts such as the piston seat 3. When the piston seat 3 is close to the cylinder head 2, flexible contact is completed through the shock-absorbing pad 11, so as to alleviate the collision and friction between the piston seat 3 and the cylinder head 2. In addition, the material of the sealing ring 6 is optimized and the dustproof components are set, so as to improve the sealing structure of the piston seat 3 from multiple directions.

[0024] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A sealing structure of a hydraulic piston seat, comprising a hydraulic cylinder (1), characterized in that: The upper end of the hydraulic cylinder (1) is provided with a cylinder cover (2), the interior of the hydraulic cylinder (1) is provided with a piston seat (3), the upper end of the piston seat (3) is provided with a piston rod (4), the surface of the piston seat (3) is provided with a wear-resistant ring (5), the surface of the piston seat (3) is provided with sealing rings (6) on both upper and lower sides of the wear-resistant ring (5), the upper end of the cylinder cover (2) is provided with a dustproof half ring (7) and a dustproof half ring (8), both ends of the dustproof half ring (7) and the dustproof half ring (8) are provided with straps (9), the upper end of the piston seat (3) is provided with a mounting groove (10) at the edge of the piston rod (4), the interior of the mounting groove (10) is provided with a shock-absorbing pad (11), and the interior of the shock-absorbing pad (11) is provided with a cavity (12).

2. The sealing structure of a hydraulic piston seat according to claim 1, characterized in that: The hydraulic cylinder (1) is slidably connected to the piston seat (3), and the sealing ring (6) is made of silicone rubber.

3. The sealing structure of a hydraulic piston seat according to claim 2, characterized in that: The inner surface of the cylinder head (2) is provided with a same wear-resistant ring (5), and the inner surface of the cylinder head (2) is provided with a same sealing ring (6) on the upper side of the wear-resistant ring (5).

4. The sealing structure of a hydraulic piston seat according to claim 3, characterized in that: The dustproof half ring 1 (7) and the dustproof half ring 2 (8) are both fitted with the piston rod (4), and the upper end of the piston rod (4) extends to the outside of the cylinder head (2) and is slidably connected to the cylinder head (2).

5. The sealing structure of a hydraulic piston seat according to claim 4, characterized in that: The dustproof half ring 1 (7) and the dustproof half ring 2 (8) are adapted to each other, and the dustproof half ring 1 (7) and the dustproof half ring 2 (8) are both connected to the cylinder head (2) via bolts (13).

6. The sealing structure of a hydraulic piston seat according to claim 1, characterized in that: The installation groove (10) and the shock-absorbing pad (11) are both designed as annular structures, and the cross-section of the cavity (12) is designed as a special-shaped structure.

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