Sealing device for air cylinder
By embedding dust sealing rings between the cylinder pressure plate and the convex ring, and using the elastic force of the extrusion spring to squeeze the sealing ring, the serious wear of dust sealing rings of the existing cylinders is solved, achieving a higher sealing effect and a longer service life, while simplifying the replacement and cleaning process.
Patent Information
- Application Number
- CN202420863416.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-24
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-04-24
AI Technical Summary
The dust-proof sealing ring of existing cylinders is severely worn, resulting in poor sealing effect, requiring frequent replacement and maintenance, and troublesome disassembly and assembly.
A sealing device for cylinders is designed, by inserting a dust-proof sealing ring between the pressure plate and the convex ring, and using the elastic force of the extrusion spring to squeeze the sealing ring, the sealing effect is achieved, while providing convenient replacement and cleaning methods.
Improves sealing effect, extends the service life of dustproof sealing rings, reduces replacement frequency, and simplifies the replacement and cleaning process.
Smart Images
Figure CN222863733U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of cylinders, in particular to a sealing device for a cylinder. Background Art
[0002] The working principle of the cylinder is to control the in and out of the gas to make the piston reciprocate in the cylinder. When the compressed gas enters the cylinder from the air inlet, enters the exhaust port through the solenoid valve, and then enters the bottom of the cylinder from the exhaust port, the airflow pushes the piston to force the piston rod to move. The excess gas in the cylinder flows into the exhaust port along the air pipe, and the gas is discharged from the exhaust port through the solenoid valve. The solenoid valve controls the movement of the middle valve core to reverse the airflow and make the piston move back.
[0003] The existing cylinder is mainly composed of a cylinder body, a piston, a piston rod, an air port, an exhaust port and a seal. Among them, the dustproof seal at the front end of the front cover in the sealing assembly is very important. It mainly sets a special dustproof seal ring structure at the front end of the front cover to prevent dust from being brought into the cylinder during the return stroke of the piston rod. The applicant found that during the use of the existing cylinder dustproof seal ring, the dustproof seal ring is in sliding connection with the piston rod and has large wear and loss. Therefore, the sealing effect will deteriorate with use, and the dustproof seal ring will accumulate more dust. Therefore, it needs to be regularly disassembled, maintained, replaced and cleaned. The replacement frequency is high, and when the above-mentioned dust seal ring is disassembled and assembled, the cylinder needs to be disassembled, which is very troublesome. In order to solve the above-mentioned problems, a sealing device for a cylinder is proposed. Utility Model Content
[0004] The purpose of the utility model is to provide a sealing device for a cylinder in order to solve the above-mentioned problems.
[0005] The technical solution adopted by the utility model is as follows: a sealing device for a cylinder, comprising a cylinder body, a piston rod is arranged inside the cylinder body, a front cover is arranged at the front of the cylinder body, a convex ring is arranged at the front end of the front cover, the piston rod passes through the convex ring, an annular notch 1 is opened at the front end of the inner cavity of the convex ring, a pressure plate is connected to the front end of the convex ring through a raw tape sealing thread, a conical sleeve hole is opened at the center of the pressure plate, an annular notch 2 is clamped on the rear side of the pressure ring, and a dustproof sealing ring is embedded between the annular notch 2 and the annular notch 1;
[0006] An annular groove is formed at the front end of the convex ring, a compression spring is inserted into the annular groove, and an annular push plate is inserted into the outer side of the annular groove.
[0007] In a preferred embodiment, a wrench slot is formed on the outer wall of the convex ring.
[0008] In a preferred embodiment, a second wrench slot is formed on the outer wall of the pressing plate.
[0009] In a preferred embodiment, the dustproof sealing ring is a conical structure.
[0010] In a preferred embodiment, an annular groove is provided on the inner wall of the convex ring, and a V-shaped sealing ring is clamped in the annular groove.
[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0012] 1. In the utility model, the dustproof sealing ring is arranged in the annular notch 2 of the pressure plate and the annular notch 1 of the convex ring, and the dustproof sealing ring is pressed tightly against the piston rod through the conical sleeve hole of the pressure plate, so as to ensure the sealing effect. At the same time, when the dustproof sealing ring is disassembled and replaced later, the personnel only need to remove the pressure plate to take out the dustproof sealing ring, so as to facilitate replacement and cleaning.
[0013] 2. In the utility model, the elastic force of the extrusion spring is used to extrude the dustproof sealing ring. Therefore, when the dustproof sealing ring is worn, the extrusion structure can be used to squeeze the dustproof sealing ring outward, and then cooperate with the tapered sleeve hole to make the dustproof sealing ring fit the piston rod, thereby improving the sealing effect. When the dustproof sealing ring is worn, the extrusion structure can compensate for the wear of the dustproof sealing ring, thereby increasing the service life of the dustproof sealing ring and reducing the replacement frequency of the dustproof sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the internal structure of the utility model;
[0015] Figure 2 For the utility model Figure 1 A magnified image of point A;
[0016] Figure 3 It is an exploded three-dimensional schematic diagram of the dustproof sealing structure in the utility model.
[0017] Markings in the figure: 1-cylinder body, 2-piston rod, 3-front cover, 4-convex ring, 5-annular notch 1, 6-pressure plate, 7-tapered sleeve hole, 8-annular notch 2, 9-dustproof sealing ring, 10-annular groove, 11-extrusion spring, 12-annular push plate, 13-wrench notch 1, 14-wrench notch 2, 15-annular groove, 16-V-shaped sealing ring. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.
[0019] The following will be combined Figure 1-Figure 3 A sealing device for a cylinder according to an embodiment of the utility model is described in detail.
[0020] Example:
[0021] The utility model provides a sealing device for a cylinder, referring to Figure 1 and Figure 2 As shown, it includes a cylinder body 1, a piston rod 2 is arranged inside the cylinder body 1, a front cover 3 is arranged at the front of the cylinder body 1, a convex ring 4 is arranged at the front end of the front cover 3, an annular groove 15 is opened on the inner wall of the convex ring 4, and a V-shaped sealing ring 16 is clamped in the annular groove 15. In this structure, the V-shaped sealing ring 6 in the convex ring 4 performs a movable seal on the movable connection between the piston rod 2 and the front cover 3, and the V-shaped sealing ring 16 is arranged in the annular groove 15, so as to limit and fix the V-shaped sealing ring 16.
[0022] It should be noted that the above-mentioned cylinder body 1 also includes a rear end cover, a cylinder barrel, a piston rod and other structures. Specifically, an SMC cylinder is adopted, and the structure of the cylinder body 1 has been disclosed in the prior art. This application does not improve the structure inside the cylinder body 1, so it is not elaborated here.
[0023] refer to Figure 1 , Figure 2 and Figure 3 As shown, the piston rod 2 passes through the convex ring 4, and the front end of the inner cavity of the convex ring 4 is provided with an annular notch 1 5. The front end of the convex ring 4 is connected to a pressing plate 6 through a raw tape sealing thread. A conical sleeve hole 7 is provided in the center of the pressing plate 6. The rear side of the pressing plate 6 is provided with an annular notch 2 8. A dustproof sealing ring 9 is embedded between the annular notch 2 8 and the annular notch 1 5. The dustproof sealing ring 9 is a conical structure. In this structure, the dustproof sealing ring 9 between the convex ring 4 and the pressing plate 6 is dustproof to prevent dust on the piston rod 2 from being brought into the cylinder.
[0024] The above-mentioned dustproof sealing ring 9 is arranged in the annular groove 2 8 of the pressure plate 6 and the annular groove 1 5 of the convex ring 4, and the dustproof sealing ring 9 is pressed tightly against the piston rod through the tapered sleeve hole 7 of the pressure plate 6, so as to ensure the sealing effect. At the same time, when the dustproof sealing ring 9 is disassembled and replaced later, the personnel only need to remove the pressure plate 6 to take out the equation sealing ring 9, so as to facilitate replacement and cleaning.
[0025] refer to Figure 2 and Figure 3 As shown, an annular groove 10 is provided at the front end of the convex ring 4, and an extrusion spring 11 is inserted into the annular groove 10, and an annular push plate 12 is inserted into the outer side of the annular groove 10. This structure utilizes the elastic force of the extrusion spring 11 to extrude the annular push plate 12, and the annular push plate 12 squeezes the dustproof sealing ring 9. Therefore, when the dustproof sealing ring 9 is pressed, the extrusion structure can be used to squeeze the dustproof sealing ring 9 outward, and then cooperate with the conical sleeve hole 7 to make the dustproof sealing ring 9 fit the piston rod, thereby improving the sealing effect, and when the dustproof sealing ring 9 is worn, the extrusion structure can compensate for the wear of the dustproof sealing ring 9, thereby increasing the service life of the dustproof sealing ring 9 and reducing the replacement frequency of the dustproof sealing ring 9.
[0026] refer to Figure 3 As shown, the outer wall of the convex ring 4 is provided with a wrench slot 13, and the outer wall of the pressure plate 6 is provided with a wrench slot 2 14. In this structure, the wrench slot 13 cooperates with the wrench slot 2 14, so that it is convenient for personnel to disassemble and assemble the pressure plate 6 using a wrench.
[0027] The implementation principle of a cylinder sealing device of the embodiment of the present application is as follows: the dustproof sealing ring 9 is arranged in the annular notch 2 8 of the pressure plate 6 and the annular notch 1 5 of the convex ring 4, and the dustproof sealing ring 9 is pressed tightly against the piston rod through the conical sleeve hole 7 of the pressure plate 6, so as to ensure the sealing effect. At the same time, when the dustproof sealing ring 9 is disassembled and replaced later, the personnel only need to disassemble the pressure plate 6 to take out the equation sealing ring 9, so as to facilitate replacement;
[0028] When the dustproof sealing ring 9 is in use, the elastic force of the extrusion spring 11 is used to squeeze the annular push plate 12, and the annular push plate 12 squeezes the dustproof sealing ring 9. Therefore, when the dustproof sealing ring 9 is pressed, the extrusion structure can be used to squeeze the dustproof sealing ring 9 outward, and then cooperate with the tapered sleeve hole 7 to make the dustproof sealing ring 9 fit the piston rod, thereby improving the sealing effect, and when the dustproof sealing ring 9 is worn, the extrusion structure can compensate for the wear of the dustproof sealing ring 9, thereby increasing the service life of the dustproof sealing ring 9 and reducing the replacement frequency of the dustproof sealing ring 9.
[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A sealing device for a cylinder, comprising a cylinder body (1), characterized in that: A piston rod (2) is arranged inside the cylinder body (1), a front cover (3) is arranged at the front of the cylinder body (1), a convex ring (4) is arranged at the front end of the front cover (3), the piston rod (2) passes through the convex ring (4), an annular notch (5) is arranged at the front end of the inner cavity of the convex ring (4), a pressing plate (6) is connected to the front end of the convex ring (4) by a raw tape sealing thread, a conical sleeve hole (7) is arranged at the center of the pressing plate (6), a second annular notch (8) is arranged at the rear side of the pressing plate (6), and a dustproof sealing ring (9) is embedded between the second annular notch (8) and the first annular notch (5); The front end of the convex ring (4) is provided with an annular groove (10), a pressing spring (11) is inserted into the annular groove (10), and an annular push plate (12) is inserted into the outer side of the annular groove (10).
2. A cylinder sealing device as claimed in claim 1, characterized in that: The outer wall of the convex ring (4) is provided with a spanner notch (13).
3. A cylinder sealing device as claimed in claim 1, characterized in that: The outer wall of the pressing plate (6) is provided with a second wrench slot (14).
4. A cylinder sealing device as claimed in claim 1, characterized in that: The dustproof sealing ring (9) is of a conical structure.
5. A cylinder sealing device as claimed in claim 1, characterized in that: An annular clamping groove (15) is provided on the inner wall of the convex ring (4), and a V-shaped sealing ring (16) is clamped in the annular clamping groove (15).