Low-abrasion hydraulic piston sealing structure
By designing a hydraulic piston seal structure including bevel gears, screws and limit blocks, the problems of large wear of seal rings and lack of limit fixing structure in the prior art are solved, and the effects of reducing hydraulic cylinder wear, extending service life and simplifying installation and disassembly are achieved.
Patent Information
- Application Number
- CN202420786751.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-04-16
AI Technical Summary
The sealing ring and the inner wall of the existing hydraulic piston sealing structure are very worn, and the piston body lacks a limit fixing structure, which leads to difficulty in installing and disassembling the sealing structure, which easily leads to position deviation, affecting the use of the hydraulic cylinder.
A hydraulic piston sealing structure including a piston body, a piston rod, an adjustment button, a sealing cover, a transmission chamber, a bevel gear, a movable groove, a movable block, a screw rod, a through groove and a limiting block is designed. The limit fixation of the seal ring is achieved through the transmission mechanism of bevel gears and screws, and a smooth enamel layer is used to reduce wear between the seal ring and the inner wall of the hydraulic cylinder.
It reduces the wear of the hydraulic cylinder, extends the service life, simplifies the installation and disassembly of the seal structure, avoids position deviation, and improves the efficiency of the hydraulic cylinder.
Smart Images
Figure CN222668535U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to hydraulic equipment, in particular to a low-wear hydraulic piston sealing structure. Background Art
[0002] The hydraulic cylinder is the actuator in the hydraulic transmission system. It is an energy conversion device that converts hydraulic energy into mechanical energy. The piston cylinder is a structural form of the hydraulic cylinder. The hydraulic piston is an important component of the piston cylinder, and its sealing structure directly affects the operation of the piston cylinder.
[0003] Existing hydraulic piston sealing structures mostly form a seal between the piston and the inner wall of the hydraulic cylinder by installing a sealing ring on the piston surface. The sealing ring and the inner wall of the hydraulic cylinder are subject to considerable wear. At the same time, the piston body and the sealing structure lack a limiting fixing structure, which makes the installation, disassembly and replacement of the sealing structure difficult and easily causes position deviation, thus affecting the use of the hydraulic cylinder.
[0004] In order to solve the above problems existing in the prior art, a new type of low-wear hydraulic piston sealing structure has been developed. Utility Model Content
[0005] The utility model aims to provide a low-wear hydraulic piston sealing structure.
[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:
[0007] A low-wear hydraulic piston sealing structure comprises a piston body, a piston rod is arranged on the inner side of the piston body, an adjusting button is arranged on the lower end of the piston rod, a sealing cover is arranged on the outer side of the adjusting button, a transmission compartment is provided on the inner side of the piston rod, a bevel gear 1 is provided on the inner side of the transmission compartment, a bevel gear 2 is provided on the side of the bevel gear 1, a movable groove is provided on the outer side of the piston rod, a movable block is provided on the inner side of the movable groove, a screw rod is threadedly connected to the inner side of the movable block, a through groove is provided on the surface of the piston body, a limiting block is provided on the inner side of the through groove, a sealing ring is provided on the outer side of the piston body, a hydraulic cylinder is provided on the outer side of the sealing ring, and a smooth glaze layer is provided on the inner side of the hydraulic cylinder.
[0008] Furthermore, the inner side of the upper end of the sealing cover and the outer side of the lower end of the piston rod are threadedly connected, a sealing gasket is provided on the inner side of the sealing cover, the upper end of the sealing gasket and the lower end of the piston rod are tightly fitted, and a shock-absorbing gasket is fixedly installed on the lower end of the sealing cover to achieve sealing protection for the adjusting button.
[0009] The upper end of the adjusting button and the inner side of the piston rod are rotatably connected via a rotating shaft. The upper end of the rotating shaft extends to the inner side of the transmission bin and is fixedly connected to the lower end of bevel gear one. A plurality of bevel gears two are arranged in a ring array and meshingly connected to bevel gear one, thereby realizing the transmission of the adjusting button to multiple bevel gears two.
[0010] The movable grooves are arranged in a ring array in multiple numbers, the movable block is slidably sleeved on the inner side of the movable groove, one end of the screw rod close to the transmission bin is rotatably connected to the inner side of the movable groove, and extends to the inner side of the transmission bin and is fixedly connected to the second bevel gear, so as to facilitate the control of multiple screw rods to rotate simultaneously to transmit the movable block.
[0011] The movable block extends to the outside of the movable groove at one end away from the transmission bin and is slidably connected to the inner side of the through groove. The limit block is slidably sleeved with the inner side of the through groove at one end close to the piston rod and fits with the movable block to push the limit block.
[0012] The sealing ring is interference connected with the outer side of the piston body, and a limiting groove is provided on the inner side of the sealing ring. A plurality of limiting grooves are arranged in a ring array. The limiting block extends to the outer side of the through groove at one end away from the movable block and fits tightly with the inner side of the limiting groove to achieve limiting fixation of the sealing ring.
[0013] The upper end of the hydraulic cylinder is detachably connected to a cylinder cover, the smooth glaze layer is fixedly connected to the inner side of the hydraulic cylinder, and the sealing ring and the inner side of the smooth glaze layer are adapted to each other, effectively reducing the wear between the sealing ring and the inner wall of the hydraulic cylinder.
[0014] When in use, the rotating shaft drives the bevel gear 1 to rotate by turning the adjusting knob, thereby driving multiple bevel gears 2 to rotate at the same time, so that the screw rod drives multiple movable blocks to slide outward along the movable groove at the same time, enter the inner side of the through groove, and push the limit block to slide along the slide groove to the limit groove until it is tightly fitted with the inner side of the limit groove, thereby achieving the limit fixation of the sealing ring. Subsequently, the movable block is reset by rotating the adjusting knob in the opposite direction, and the limit of the limit block is released, so that it can be forced to break away from the limit groove and slide along the slide groove, and the sealing ring can be removed and replaced; the sealing cover is threadedly connected to the lower end of the piston rod, so that the sealing gasket is tightly fitted with the piston rod, thereby achieving sealing protection at the adjusting button, and at the same time, the shock-absorbing gasket cushions the collision between the piston body and the cylinder bottom during operation; the smooth glaze layer is used to ensure the wear resistance and corrosion resistance of the inner wall of the hydraulic cylinder, and at the same time, the wear between the sealing ring and the inner wall of the hydraulic cylinder is effectively reduced.
[0015] The utility model solves the problem that the hydraulic piston sealing structure mostly forms a seal between the piston and the inner wall of the hydraulic cylinder by installing a sealing ring on the surface of the piston, the sealing ring and the inner wall of the hydraulic cylinder produce great wear, and at the same time, the piston body and the sealing structure lack a limiting fixing structure, which makes the installation, disassembly and replacement of the sealing structure difficult, and easily causes position deviation, thereby affecting the use of the hydraulic cylinder.
[0016] Compared with the prior art, the utility model can reduce the wear on the hydraulic cylinder, prolong the service life of the hydraulic cylinder, and is convenient to install and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the piston body, piston rod and sealing ring of the utility model;
[0019] Figure 3 It is a front view half-section structure schematic diagram of the utility model.
[0020] In the figure: 1. Piston body; 2. Piston rod; 3. Adjusting button; 31. Rotating shaft; 4. Sealing cover; 41. Sealing gasket; 42. Shock-absorbing gasket; 5. Transmission compartment; 6. Bevel gear one; 7. Bevel gear two; 8. Movable groove; 9. Movable block; 10. Screw rod; 11. Through groove; 111. Slide groove; 12. Limit block; 13. Sealing ring; 131. Limit groove; 14. Hydraulic cylinder; 141. Cylinder head; 15. Smooth enamel layer. DETAILED DESCRIPTION
[0021] 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.
[0022] like Figure 1-3A low-wear hydraulic piston sealing structure shown in the figure comprises a piston body 1, a piston rod 2 is arranged on the inner side of the piston body 1, an adjusting button 3 is arranged at the lower end of the piston rod 2, a sealing cover 4 is arranged on the outer side of the adjusting button 3, the inner side of the upper end of the sealing cover 4 and the outer side of the lower end of the piston rod 2 are threadedly connected, a sealing gasket 41 is arranged on the inner side of the sealing cover 4, the upper end of the sealing gasket 41 and the lower end of the piston rod 2 are tightly fitted, and a shock-absorbing gasket 42 is fixedly installed on the lower end of the sealing cover 4, wherein the assembly of the piston body 1 and the piston rod 2 is the prior art, and the sealing gasket 41 and the piston rod 2 are tightly fitted by threading the sealing cover 4 and the lower end of the piston rod 2, so as to realize the sealing protection at the adjusting button 3, and at the same time, the shock-absorbing gasket 42 buffers the collision between the piston body 1 and the cylinder bottom during the working process;
[0023] A transmission chamber 5 is provided on the inner side of the piston rod 2, a bevel gear 1 6 is provided on the inner side of the transmission chamber 5, a bevel gear 2 7 is provided on the side of the bevel gear 1 6, the upper end of the adjusting button 3 and the inner side of the piston rod 2 are rotatably connected through a rotating shaft 31, the upper end of the rotating shaft 31 extends to the inner side of the transmission chamber 5, and is fixedly connected to the lower end of the bevel gear 1 6, a plurality of bevel gears 2 7 are provided in a ring array, and are meshed with the bevel gear 1 6, a movable groove 8 is provided on the outer side of the piston rod 2, and an movable groove 8 is provided on the inner side of the movable groove 8. The movable block 9 is provided with a screw rod 10 on the inner side of the movable block 9, and a plurality of movable grooves 8 are arranged in a ring array. The movable block 9 is slidably sleeved on the inner side of the movable groove 8. The end of the screw rod 10 close to the transmission chamber 5 is rotatably connected to the inner side of the movable groove 8, and extends to the inner side of the transmission chamber 5 and is fixedly connected to the bevel gear 27. A through groove 11 is provided on the surface of the piston body 1. The end of the movable block 9 away from the transmission chamber 5 extends to the outer side of the movable groove 8, and is slidably connected to the inner side of the through groove 11. The inner side of the through groove 11 is provided with A limit block 12 is provided, and one end of the limit block 12 close to the piston rod 2 is slidably sleeved with the inner side of the through groove 11 through the slide groove 111, and is fitted with the movable block 9. A sealing ring 13 is provided on the outer side of the piston body 1. The sealing ring 13 is interference-connected with the outer side of the piston body 1. A limit groove 131 is provided on the inner side of the sealing ring 13. A plurality of limit grooves 131 are provided in an annular array. The end of the limit block 12 away from the movable block 9 extends to the outer side of the through groove 11, and is tightly fitted with the inner side of the limit groove 131. After assembling the piston body 1 on the lower end of the piston rod 2, the sealing ring 13 is sleeved on the outer side of the piston body 1, and the rotating shaft 31 drives the bevel gear 1 6 to rotate by turning the adjusting knob 3, thereby driving the multiple bevel gears 2 7 to rotate at the same time, so that the screw rod 10 drives the multiple movable blocks 9 to slide outward along the movable groove 8 at the same time, enter the inner side of the through groove 11, and push the limit block 12 to slide along the slide groove 111 to the limit groove 131 until it is tightly fitted with the inner side of the limit groove 131, thereby realizing the limit fixation of the sealing ring 13;
[0024] A hydraulic cylinder 14 is arranged on the outer side of the sealing ring 13, and a smooth glaze layer 15 is arranged on the inner side of the hydraulic cylinder 14. A cylinder cover 141 is detachably connected to the upper end of the hydraulic cylinder 14. The smooth glaze layer 15 is fixedly connected to the inner side of the hydraulic cylinder 14. The inner sides of the sealing ring 13 and the smooth glaze layer 15 are adapted to each other. After the sealing ring 13 is assembled, the piston body 1 is placed into the inner side of the hydraulic cylinder 14, and the cylinder cover 141 is closed. At this time, the sealing ring 13 and the smooth glaze layer 15 are fitted to each other, and the smooth glaze layer 15 is used to ensure the wear resistance and corrosion resistance of the inner wall of the hydraulic cylinder 14, while effectively reducing the wear between the sealing ring 13 and the inner wall of the hydraulic cylinder 14.
[0025] During use, after the piston body 1 is assembled on the lower end of the piston rod 2, the sealing ring 13 is sleeved on the outer side of the piston body 1, and the rotating shaft 31 drives the bevel gear 1 6 to rotate by turning the adjusting knob 3, thereby driving multiple bevel gears 2 7 to rotate at the same time, so that the screw rod 10 drives multiple movable blocks 9 to slide outward along the movable groove 8 at the same time, enter the inner side of the through groove 11, and push the limit block 12 to slide along the slide groove 111 to the limit groove 131 until it is tightly fitted with the inner side of the limit groove 131, thereby realizing the limit fixation of the sealing ring 13, and by threading the sealing cover 4 with the lower end of the piston rod 2, the sealing gasket 41 is tightly fitted with the piston rod 2, thereby realizing the sealing protection at the adjusting knob 3, and reducing The shock washer 42 cushions the collision between the piston body 1 and the cylinder bottom during operation. When the sealing ring 13 needs to be disassembled and replaced later, the movable block 9 is reset by rotating the adjusting knob 3 in the opposite direction to release the limit block 12, so that it can be forced to break away from the limit groove 131 and slide along the slide groove 111, and the sealing ring 13 can be removed and replaced. After the sealing ring 13 is assembled, the piston body 1 is placed inside the hydraulic cylinder 14 and the cylinder cover 141 is closed. At this time, the sealing ring 13 and the smooth glaze layer 15 fit each other, and the smooth glaze layer 15 is used to ensure the wear resistance and corrosion resistance of the inner wall of the hydraulic cylinder 14, while effectively reducing the wear between the sealing ring 13 and the inner wall of the hydraulic cylinder 14.
[0026] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.
[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A low-wear hydraulic piston sealing structure, comprising a piston body (1), characterized in that: A piston rod (2) is arranged on the inner side of the piston body (1), an adjusting button (3) is arranged on the lower end of the piston rod (2), a sealing cover (4) is arranged on the outer side of the adjusting button (3), a transmission chamber (5) is arranged on the inner side of the piston rod (2), a bevel gear 1 (6) is arranged on the inner side of the transmission chamber (5), a bevel gear 2 (7) is arranged on the side of the bevel gear 1 (6), a movable groove (8) is arranged on the outer side of the piston rod (2), a movable block (9) is arranged on the inner side of the movable groove (8), a screw rod (10) is threadedly connected to the inner side of the movable block (9), a through groove (11) is arranged on the surface of the piston body (1), a limit block (12) is arranged on the inner side of the through groove (11), a sealing ring (13) is arranged on the outer side of the piston body (1), a hydraulic cylinder (14) is arranged on the outer side of the sealing ring (13), and a smooth glaze layer (15) is arranged on the inner side of the hydraulic cylinder (14).
2. A low-wear hydraulic piston sealing structure according to claim 1, characterized in that: The inner side of the upper end of the sealing cover (4) and the outer side of the lower end of the piston rod (2) are threadedly connected, a sealing gasket (41) is provided on the inner side of the sealing cover (4), the upper end of the sealing gasket (41) and the lower end of the piston rod (2) are tightly fitted, and a shock-absorbing gasket (42) is fixedly mounted on the lower end of the sealing cover (4).
3. A low-wear hydraulic piston sealing structure according to claim 1, characterized in that: The upper end of the regulating button (3) and the inner side of the piston rod (2) are rotatably connected via a rotating shaft (31); the upper end of the rotating shaft (31) extends to the inner side of the transmission chamber (5) and is fixedly connected to the lower end of the bevel gear 1 (6); a plurality of bevel gears 2 (7) are arranged in a ring array and meshingly connected to the bevel gear 1 (6).
4. A low-wear hydraulic piston sealing structure according to claim 1, characterized in that: The movable grooves (8) are arranged in a plurality in an annular array, the movable blocks (9) are slidably sleeved with the inner side of the movable grooves (8), one end of the screw rod (10) close to the transmission bin (5) is rotatably connected to the inner side of the movable groove (8), and extends to the inner side of the transmission bin (5) and is fixedly connected to the second bevel gear (7).
5. A low-wear hydraulic piston sealing structure according to claim 1, characterized in that: One end of the movable block (9) away from the transmission chamber (5) extends to the outside of the movable groove (8) and is slidably connected to the inside of the through groove (11); one end of the limit block (12) close to the piston rod (2) is slidably sleeved to the inside of the through groove (11) via a slide groove (111) and fits the movable block (9) to each other.
6. A low-wear hydraulic piston sealing structure according to claim 1, characterized in that: The sealing ring (13) is interference-connected with the outer side of the piston body (1); a limiting groove (131) is provided on the inner side of the sealing ring (13); a plurality of limiting grooves (131) are arranged in a ring array; an end of the limiting block (12) away from the movable block (9) extends to the outer side of the through groove (11) and fits tightly with the inner side of the limiting groove (131).
7. A low-wear hydraulic piston sealing structure according to claim 1, characterized in that: The upper end of the hydraulic cylinder (14) is detachably connected to a cylinder cover (141), the smooth glaze layer (15) and the inner side of the hydraulic cylinder (14) are fixedly connected, and the sealing ring (13) and the inner side of the smooth glaze layer (15) are mutually adapted.