CN215444587U

CN215444587U - Sealing device of piston rod

Info

Publication number: CN215444587U
Application number: CN202121451974.3U
Authority: CN
Inventors: 张同连; 杨文江; 杨德春
Original assignee: Tianjin Jinling Yunzhi Machinery Co ltd
Current assignee: Tianjin Jinling Yunzhi Machinery Co ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-01-07
Anticipated expiration: 2031-06-29

Abstract

The utility model discloses a sealing device of a piston rod, which comprises a piston rod body, wherein a cylinder cover and a sealing cover are respectively sleeved on the outer surface of the piston rod body, the sealing cover is rotatably connected with the inside of the cylinder cover through threads, the sealing cover comprises a first sealing body and a second sealing body which are oppositely arranged, and two first grooves are sequentially formed in the sealing cover. According to the piston rod assembly, the sealing cover is screwed out of the cylinder cover and the bolt is taken down, so that the first sealing body and the second sealing body can be disassembled, the first sealing ring in the sealing cover can be replaced and maintained, the first sealing ring formed by the two sealing half rings is convenient to disassemble, the whole piston rod assembly can be maintained without being disassembled, lubricating oil can be injected into the surface of the piston rod body through the oil storage cavity and the oil outlet hole, the lubricating property of the piston rod is improved, dust adsorbed on the surface of the piston rod can be scraped through the arranged rubber scraper, and the service life is further prolonged.

Description

Sealing device of piston rod

Technical Field

The utility model relates to the technical field of sealing devices, in particular to a sealing device of a piston rod.

Background

The piston rod is a connecting component for supporting the piston to do work, most of the piston rod is applied to an oil cylinder and an air cylinder movement executing component, and the piston rod is a movement component with frequent movement and high technical requirements. Taking a hydraulic oil cylinder as an example, the hydraulic oil cylinder comprises: the cylinder barrel, the piston rod (oil cylinder rod), the piston and the end cover. The quality of the processing quality directly influences the service life and the reliability of the whole product. The piston rod has high processing requirement, the surface roughness requirement of the piston rod is Ra0.4-0.8 mu m, and the requirements on coaxiality and wear resistance are strict;

now relate to a sealing device of piston rod, current piston rod surface lacks the lubrication, and the friction between piston rod and the sealing device is great for sealing device often damages, and needs to be changed, greatly increased use cost, and the sealing device of current piston rod is direct cover on the piston rod mostly, just can pull down whole piston rod when changing the maintenance and maintain, complex operation not only, greatly increased maintenance personal's work burden moreover.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a sealing device of a piston rod.

In order to achieve the purpose, the utility model adopts the following technical scheme: a sealing device of a piston rod comprises a piston rod body, wherein a cylinder cover and a sealing cover are respectively sleeved on the outer surface of the piston rod body, the sealing cover is rotatably connected with the inside of the cylinder cover through threads, the sealing cover comprises a first sealing body and a second sealing body which are oppositely arranged, two first grooves are sequentially formed in the sealing cover, a first sealing ring is embedded in each first groove, oil storage cavities are formed in the first sealing body and the second sealing body, an oil outlet is formed in one side of the bottom of each oil storage cavity, one end of the oil outlet extends between the two first grooves, an oil filling hole is formed in the top end of each oil storage cavity, a second groove is formed in the inner part of the sealing cover and close to the top of the sealing cover, a dust ring is embedded in the second groove, and supporting rods are symmetrically and fixedly connected with the tops of the first sealing body and the second sealing body, the top end of the supporting rod is fixedly connected with a rubber scraper.

Furthermore, the outer surface of the second sealing body is symmetrically provided with openings, bolts penetrate through the openings, and the outer surface of the first sealing body is provided with threaded holes corresponding to the bolts.

Furthermore, the first sealing ring comprises two sealing half rings which are oppositely arranged, and two ends of each sealing half ring are respectively provided with a corresponding clamping block and a corresponding clamping groove.

Further, a third groove is formed in the bottom of the inner portion of the cylinder cover, a second sealing ring is installed in the third groove in an embedded mode, and the bottom end of the sealing cover is in contact with the top of the second sealing ring.

Furthermore, the bottom fixedly connected with connecting pipe of cylinder cap, the surface of connecting pipe is equipped with the external screw thread.

Furthermore, a top cover connected through threads is arranged inside the top end of the oil filling hole.

Furthermore, the two rubber scrapers are both semicircular in shape.

The utility model has the beneficial effects that:

when the utility model is used, the sealing device of the piston rod combines the first sealing body and the second sealing body into a sealing cover through the bolt, and is connected with the cylinder cover through the screw thread, so that when the sealing component is maintained and replaced, the sealing cover only needs to be screwed out of the cylinder cover through the screw thread, then the bolt is taken down, the first sealing body and the second sealing body can be disassembled, so that the first sealing ring in the first sealing body can be replaced and maintained, the first sealing ring consisting of the two sealing half rings is convenient to disassemble, thereby the whole piston rod assembly can be maintained without being detached, lubricating oil can be injected between the two first sealing rings through the oil storage cavity and the oil outlet hole, thereby increasing the lubricity of the piston rod and prolonging the service life, and the rubber scraper blade can scrape off the dust adsorbed on the surface of the piston rod, thereby further prolonging the service life.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a top view of the seal cap of the present invention;

FIG. 3 is a top view of the first seal ring of the present invention.

Illustration of the drawings:

1. a piston rod body; 2. a cylinder cover; 3. a sealing cover; 4. a first sealing body; 5. a second sealing body; 6. a first groove; 7. a first seal ring; 8. an oil storage chamber; 9. an oil outlet hole; 10. an oil filler hole; 11. a second groove; 12. a dust ring; 13. a support bar; 14. a rubber blade; 15. an opening; 16. a bolt; 17. a threaded hole; 18. a clamping block; 19. a card slot; 20. a third groove; 21. a second seal ring; 22. a connecting pipe; 23. a top cover; 24. and sealing the semi-ring.

Detailed Description

As shown in fig. 1 to 3, a sealing device of a piston rod is provided, which comprises a piston rod body 1, wherein a cylinder cover 2 and a sealing cover 3 are respectively sleeved on the outer surface of the piston rod body 1, the sealing cover 3 is rotatably connected with the inside of the cylinder cover 2 through a thread, the sealing cover 3 comprises a first sealing body 4 and a second sealing body 5 which are oppositely arranged, two first grooves 6 are sequentially arranged inside the sealing cover 3, a first sealing ring 7 is embedded inside the first groove 6, oil storage chambers 8 are respectively arranged inside the first sealing body 4 and the second sealing body 5, an oil outlet 9 is arranged on one side of the bottom of the oil storage chamber 8, one end of the oil outlet 9 extends between the two first grooves 6, an oil filling hole 10 is arranged at the top end of the oil storage chamber 8, a second groove 11 is arranged inside the sealing cover 3 and close to the top, and a dust ring 12 is embedded inside the second groove 11, the top symmetry fixedly connected with bracing piece 13 of first seal 4 and second seal 5, the equal fixedly connected with rubber scraper 14 in top of bracing piece 13.

When the sealing device of the piston rod is used, in the installation, the sealing semi-rings 24 of the two first sealing rings 7 are sleeved on the piston rod body 1 in a matching way, the dust ring 12 is sleeved on the piston rod body 1, then the first sealing body 4 and the second sealing body 5 are clamped with each other, so that the two first sealing rings 7 and the dust ring 12 respectively enter the first groove 6 and the third groove 20, then the bolt 16 is rotated to combine the first sealing body 4 and the second sealing body 5 into the sealing cover 3, further the sealing cover 3 is connected with the inside of the cylinder cover 2 through threads, when maintenance is needed, the sealing cover 3 is rotated to be screwed out of the cylinder cover 2 through the threads, then the bolt 16 is taken down, the first sealing body 4 and the second sealing body 5 can be replaced and maintained, and the first sealing ring 7 in the cylinder cover can be detached conveniently through the first sealing ring 7 formed by the two sealing semi-rings 24, thereby need not pull down whole piston rod assembly and just can maintain, can pour into lubricating oil into between two first sealing rings 7 through oil storage chamber 8 and oil outlet 9 to increase the lubricity of piston rod, thereby increase of service life, when piston rod body 1 removed, can scrape the absorptive dust in piston rod surface through the rubber scraper 14 that sets up, thereby further increase of service life.

In a further scheme, the outer surface of the second sealing body 5 is symmetrically provided with openings 15, bolts 16 penetrate through the openings 15, the outer surface of the first sealing body 4 is provided with threaded holes 17 corresponding to the bolts 16, and the first sealing body 4 and the second sealing body 5 are combined into the sealing cover 3 through the cooperation of the bolts 16 and the threaded holes 17.

In a further scheme, the first sealing ring 7 comprises two sealing half rings 24 which are oppositely arranged, two ends of each sealing half ring 24 are respectively provided with a clamping block 18 and a clamping groove 19, the two sealing half rings 24 are convenient to mount and dismount the first sealing ring 7, and the two sealing half rings 24 are convenient to connect through the clamping blocks 18 and the clamping grooves 19.

In a further scheme, third recess 20 has been seted up to the inside bottom of cylinder cap 2, the inside embedded mounting of third recess 20 has second sealing ring 21, the bottom of sealed lid 3 contacts with the top of second sealing ring 21, and the second sealing ring 21 through the setting is in order to increase the leakproofness between cylinder cap 2 and the sealed lid 3.

In a further scheme, the bottom fixedly connected with connecting pipe 22 of cylinder cap 2, the surface of connecting pipe 22 is equipped with the external screw thread, and connecting pipe 22 and the external screw thread that sets up are convenient for cylinder cap 2 to be connected with the cylinder.

In a further scheme, a top cover 23 connected through threads is arranged inside the top end of the oil filling hole 10, and dust can be prevented from falling into the oil storage cavity 8 through the top cover 23.

In a further scheme, the two rubber scraping plates 14 are both semicircular in shape, and a circle can be formed by the two semicircular rubber scraping plates 14, so that the outer surface of the piston rod body 1 can be conveniently and comprehensively hung with dust.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A sealing device of a piston rod comprises a piston rod body (1), and is characterized in that: the outer surface of the piston rod body (1) is respectively sleeved with a cylinder cover (2) and a sealing cover (3), the sealing cover (3) is rotatably connected with the inside of the cylinder cover (2) through threads, the sealing cover (3) comprises a first sealing body (4) and a second sealing body (5) which are arranged oppositely, two first grooves (6) are sequentially formed in the sealing cover (3), a first sealing ring (7) is installed in the first groove (6) in an embedded mode, oil storage cavities (8) are formed in the first sealing body (4) and the second sealing body (5), oil outlets (9) are formed in one side of the bottom of each oil storage cavity (8), one ends of the oil outlets (9) extend between the two first grooves (6), oil filling holes (10) are formed in the top ends of the oil storage cavities (8), and a second groove (11) is formed in the sealing cover (3) and close to the top, the dust ring (12) is installed in the inside embedding of second recess (11), the top symmetry fixedly connected with bracing piece (13) of first seal (4) and second seal (5), the equal fixedly connected with rubber scraper (14) in top of bracing piece (13).

2. A piston rod seal assembly according to claim 1, wherein: the outer surface of the second sealing body (5) is symmetrically provided with an opening (15), a bolt (16) penetrates through the opening (15), and the outer surface of the first sealing body (4) is provided with a threaded hole (17) corresponding to the bolt (16).

3. A piston rod seal assembly according to claim 1, wherein: the first sealing ring (7) comprises two sealing half rings (24) which are oppositely arranged, and two ends of each sealing half ring (24) are respectively provided with a clamping block (18) and a clamping groove (19) which correspond to each other.

4. A piston rod seal assembly according to claim 1, wherein: third recess (20) have been seted up to the inside bottom of cylinder cap (2), the inside embedded mounting of third recess (20) has second sealing ring (21), the bottom of sealed lid (3) contacts with the top of second sealing ring (21).

5. A piston rod seal assembly according to claim 1, wherein: the bottom fixedly connected with connecting pipe (22) of cylinder cap (2), the surface of connecting pipe (22) is equipped with the external screw thread.

6. A piston rod seal assembly according to claim 1, wherein: and a top cover (23) connected through threads is arranged inside the top end of the oil filling hole (10).

7. A piston rod seal assembly according to claim 1, wherein: the two rubber scrapers (14) are both semicircular in shape.