Cylinder with double seal structure

Abstract

The utility model discloses a cylinder technical field's cylinder with double sealing structure, including cylinder, one end of cylinder is installed with end cover, the outside wall one side of end cover top and below all installs the locating post, the inside installation of cylinder has piston rod, its structure is reasonable, the utility model discloses the sealing ring B on piston rod is in the sliding mode and is connected in the guide column outer wall place on sealing ring A, and the guide column outer wall is equipped with buffer spring, according to the effect of elastic reaction force of buffer spring, make its piston rod in the gas injection or the deflation process, sealing ring B receives the buffering effect of buffer spring, reduces the wear and tear of the outer wall of sealing ring B and the inner wall of cylinder and produces the situation, and according to the rotating nut C, can adjust the interval between sealing ring B and sealing ring A, guarantee pressure uniform and not deviate, avoid the uneven pressure as far as possible and lead to the wear and tear of the situation that the offset produces that flow loss occurs.

Description

Technical Field

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

[0002] A cylinder is a device used for mechanical motion control, typically consisting of a cylindrical body and a piston. Gas pressure (usually compressed air or other gases) pushes the piston to move linearly within the cylinder, thus converting mechanical energy. Currently, cylinder sealing structures are relatively mature sealing technologies on the market. However, the sealing structure at the piston rod is usually fixed in position. If the sealing rings are not properly arranged, it may lead to excessively large or uneven gaps between the sealing surfaces, causing pressure loss inside the cylinder, affecting equipment efficiency, and also easily causing uneven pressure or misalignment of the sealing rings, accelerating wear, shortening their service life, and leading to frequent replacements and downtime for maintenance. Furthermore, the sealing structure between the cylinder end cap and piston rod is relatively simple. After long-term use, the sealing structure between the piston rod and end cap is prone to damage, making effective replacement difficult, thus reducing the cylinder's sealing and performance, and indirectly affecting its durability.

[0003] Therefore, it is necessary to develop cylinders with a double sealing structure. Utility Model Content

[0004] The purpose of this invention is to provide a cylinder with a double sealing structure to solve the problems of cylinder sealing performance, easy damage and difficulty in replacement mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cylinder with a double sealing structure, comprising a cylinder, an end cap installed at one end of the cylinder, positioning pins installed above and below one side outer wall of the end cap, and a piston rod installed inside the cylinder; The end cap is equipped with a sealing assembly, which includes a mounting ring and an outer ring mounted on one side of the outer wall of the mounting ring.

[0006] Preferably, a nut A is provided on one side of the outer wall of the positioning post, and the interior of the nut A is threadedly connected to the outer wall of the positioning post.

[0007] Preferably, a screw is installed at one end of the piston rod, and a sealing ring A is slidably connected to one side of the outer wall of the screw.

[0008] Preferably, a nut B is threadedly connected to the other side of the outer wall of the screw, and a sealing ring B is slidably connected to one side of the outer wall of the piston rod.

[0009] Preferably, a guide post is installed on one side of the outer wall of the sealing ring A, and the outer wall of the guide post is slidably connected to the inside of the sealing ring B.

[0010] Preferably, a nut C is threaded onto one side of the outer wall of the guide post, and a buffer spring is provided on the other side of the outer wall of the guide post.

[0011] Preferably, the outer wall of the outer ring is slidably connected to the interior of the end cap, an outer sealing ring is installed on the outer wall of the outer ring, and a positioning element is installed on the outer wall of each mounting ring, the interior of the positioning element being slidably connected to the outer wall of the positioning post.

[0012] Preferably, limit rings are installed on both sides of the inner side of the outer ring, and an inner sealing ring is installed between the opposite sides of the two sets of limit rings.

[0013] Compared with the prior art, the beneficial effects of this utility model are: By sliding the sealing ring B on the piston rod to the outer wall of the guide post on the sealing ring A, and installing a buffer spring on the outer wall of the guide post, the sealing ring B is buffered by the buffer spring during the injection or release of air, reducing the wear between the outer wall of the sealing ring B and the inner wall of the cylinder. Furthermore, by rotating the nut C, the distance between the sealing ring B and the sealing ring A can be adjusted to ensure uniform pressure and prevent deviation, thus minimizing the risk of pressure loss and wear due to deviation caused by uneven pressure. By sliding the outer ring on the mounting ring sequentially onto the inside of the end cap and the outer wall of the positioning column, and then fitting an outer sealing ring onto the outer wall of the outer ring and an inner sealing ring onto the inside of the outer ring, the outer sealing ring ensures the seal between the outer ring and the end cap, while the inner sealing ring ensures the seal between the piston rod and the inside of the outer ring. Together with the inner sealing rings A and B, a double sealing effect is formed. At the same time, the mounting ring and the end cap are detachable, which facilitates the replacement of the inner and outer sealing rings later. The operation is simple and convenient, minimizing the possibility of difficulty in replacement affecting the sealing performance. This effectively improves the sealing and performance of the cylinder, and indirectly improves the durability of the cylinder. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of this utility model; Figure 2 This is a partial internal structural diagram of the present invention; Figure 3 This is a partial enlarged structural schematic diagram of the present invention; Figure 4 This is a partial exploded view of the structure provided for this utility model.

[0015] In the diagram: 1. Cylinder; 2. End cap; 201. Positioning pin; 202. Nut A; 3. Piston rod; 301. Screw; 302. Sealing ring A; 303. Nut B; 304. Sealing ring B; 305. Guide pin; 306. Nut C; 307. Buffer spring; 4. Mounting ring; 401. Outer ring; 402. Outer sealing ring; 403. Positioning element; 404. Limiting ring; 405. Inner sealing ring. Detailed Implementation

[0016] 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.

[0017] This utility model provides the following technical solution: a cylinder with a double-sealing structure, please refer to... Figures 1-4 The system includes a cylinder 1, with an end cap 2 mounted on one end. Positioning pins 201 are mounted on both the upper and lower sides of one outer wall of the end cap 2. A nut A202 is provided on one side of the outer wall of the positioning pin 201, and the interior of the nut A202 is threadedly connected to the outer wall of the positioning pin 201. A piston rod 3 is installed inside the cylinder 1, with a screw 301 mounted on one end of the piston rod 3. A sealing ring A302 is slidably connected to one side of the outer wall of the screw 301, and a nut B303 is threadedly connected to the other side of the outer wall of the screw 301. A sealing ring B304 is slidably connected to one side of the outer wall of the piston rod 3. Guide pins 305 are mounted on one side of the outer wall of the sealing ring A302. The outer wall of guide post 305 is slidably connected to the inside of sealing ring B304. A nut C306 is threadedly connected to one side of the outer wall of guide post 305, and a buffer spring 307 is provided on the other side of the outer wall of guide post 305. The sealing ring B304 on piston rod 3 is slidably connected to the outer wall of guide post 305 on sealing ring A302, and the buffer spring 307 is fitted on the outer wall of guide post 305. According to the elastic reaction force of buffer spring 307, the sealing ring B304 is buffered by the buffer spring during the injection or release of air of piston rod 3, thereby reducing the wear between the outer wall of sealing ring B304 and the inner wall of cylinder 1. A sealing assembly is installed inside the end cap 2. The sealing assembly includes a mounting ring 4. An outer ring 401 is installed on one outer wall of the mounting ring 4. The outer wall of the outer ring 401 is slidably connected to the interior of the end cap 2. An outer sealing ring 402 is installed on the outer wall of the outer ring 401. A positioning element 403 is installed on the outer wall of the mounting ring 4. The interior of the positioning element 403 is slidably connected to the outer wall of the positioning post 201. Limiting rings 404 are installed on both sides of the interior of the outer ring 401. An inner sealing ring is installed between the opposite sides of the two sets of limiting rings 404. The sealing ring 405 is used to slide the outer ring 401 on the mounting ring 4 onto the inside of the end cover 2 and the outer wall of the positioning post 201. An outer sealing ring 402 is fitted onto the outer wall of the outer ring 401, and an inner sealing ring 405 is fitted inside the outer ring 401. The outer sealing ring 402 is used to ensure the seal between the outer ring 401 and the end cover 2, and the inner sealing ring 405 ensures the seal between the piston rod 3 and the inside of the outer ring 401. Together with the inner sealing rings A302 and B304, a double sealing effect is formed.

[0018] Working principle: When using this utility model, the sealing ring B304 on the piston rod 3 is slidably connected to the outer wall of the guide post 305 on the sealing ring A302, and a buffer spring 307 is fitted on the outer wall of the guide post 305. Due to the elastic reaction force of the buffer spring 307, the sealing ring B304 is buffered during the injection or release of air, reducing wear between the outer wall of the sealing ring B304 and the inner wall of the cylinder 1. Furthermore, by rotating the nut C306, the distance between the sealing ring B304 and the sealing ring A302 can be adjusted to ensure uniform pressure and prevent deviation, minimizing pressure unevenness that could lead to leakage and wear. The outer ring 4 on the mounting ring 4... 01 is slidably connected to the inside of the end cover 2 and the outer wall of the positioning post 201. An outer sealing ring 402 is fitted onto the outer wall of the outer ring 401, and an inner sealing ring 405 is fitted inside the outer ring 401. The outer sealing ring 402 ensures the seal between the outer ring 401 and the end cover 2, while the inner sealing ring 405 ensures the seal between the piston rod 3 and the inside of the outer ring 401. Together with the inner sealing rings A302 and B304, a double sealing effect is formed. At the same time, the mounting ring 4 is detachable from the end cover 2, which facilitates the replacement of the inner and outer sealing rings in the future. The operation is simple and convenient, avoiding the situation where the sealing performance is affected by the difficulty of replacement. This effectively improves the sealing and performance of the cylinder, and also indirectly improves the durability of the cylinder.

[0019] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A cylinder with a double-sealed structure, comprising a cylinder (1), wherein an end cap (2) is mounted on one end of the cylinder (1), characterized in that: Positioning pins (201) are installed on the upper and lower sides of one side outer wall of the end cap (2), and a piston rod (3) is installed inside the cylinder (1). The end cap (2) is equipped with a sealing assembly, which includes a mounting ring (4) and an outer ring (401) is installed on one side of the outer wall of the mounting ring (4).

2. The cylinder with a double sealing structure according to claim 1, characterized in that: The positioning post (201) has a nut A (202) on one side of its outer wall, and the inside of the nut A (202) is threadedly connected to the outer wall of the positioning post (201).

3. The cylinder with a double sealing structure according to claim 1, characterized in that: A screw (301) is installed at one end of the piston rod (3), and a sealing ring A (302) is slidably connected to one side of the outer wall of the screw (301).

4. The cylinder with a double sealing structure according to claim 3, characterized in that: A nut B (303) is threadedly connected to the other side of the outer wall of the screw (301), and a sealing ring B (304) is slidably connected to one side of the outer wall of the piston rod (3).

5. The cylinder with a double sealing structure according to claim 4, characterized in that: Guide posts (305) are installed on one side of the outer wall of the sealing ring A (302), and the outer wall of the guide post (305) is slidably connected to the inside of the sealing ring B (304).

6. The cylinder with a double sealing structure according to claim 5, characterized in that: A nut C (306) is threaded onto one side of the outer wall of the guide post (305), and a buffer spring (307) is provided on the other side of the outer wall of the guide post (305).

7. The cylinder with a double sealing structure according to claim 1, characterized in that: The outer wall of the outer ring (401) is slidably connected to the inside of the end cap (2). An outer sealing ring (402) is installed on the outer wall of the outer ring (401). A positioning element (403) is installed on the outer wall of the mounting ring (4). The inside of the positioning element (403) is slidably connected to the outer wall of the positioning column (201).

8. The cylinder with a double sealing structure according to claim 7, characterized in that: Limiting rings (404) are installed on both sides of the inner side of the outer ring (401), and an inner sealing ring (405) is installed between the two sets of limiting rings (404) on opposite sides.

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