CN215634111U

CN215634111U - Sealing device of hydraulic cylinder

Info

Publication number: CN215634111U
Application number: CN202121399837.XU
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: 2021-06-23
Filing date: 2021-06-23
Publication date: 2022-01-25
Anticipated expiration: 2031-06-23

Abstract

The utility model discloses a sealing device of a hydraulic cylinder, which comprises a cylinder body, wherein one end of the cylinder body is provided with a first opening, a piston rod is arranged in the cylinder body, the surface of one end, positioned in the cylinder body, of the piston rod is fixedly sleeved with a piston, a sealing sleeve is arranged on the cylinder body, close to the first opening, the middle part of the sealing sleeve is provided with a second opening, and a first annular clamping block and a second annular clamping block are arranged in the sealing sleeve. According to the utility model, the cylinder body, the sealing sleeve, the first annular clamping block, the second annular clamping block, the first sealing groove, the second sealing groove, the third sealing groove, the dust ring, the first sealing rubber ring and the second sealing rubber ring are arranged, so that the dust ring, the first sealing rubber ring and the second sealing rubber ring can be rapidly installed or disassembled, and after the hydraulic cylinder is used for too long time, the dust ring, the first sealing rubber ring and the second sealing rubber ring can be rapidly replaced, so that the working state of the hydraulic cylinder is always in a good state.

Description

Sealing device of hydraulic cylinder

Technical Field

The utility model relates to the technical field of hydraulic cylinder sealing, in particular to a sealing device of a hydraulic cylinder.

Background

The hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and makes linear reciprocating motion, has simple structure and reliable work, can omit a speed reducer when the hydraulic cylinder is used for realizing the reciprocating motion, has no transmission clearance, and moves stably, thereby being widely applied to hydraulic systems of various machines. The hydraulic cylinder works without opening a hydraulic seal, and the hydraulic seal is a device for preventing working medium from leaking out of the shell along the shaft and preventing external dust from reversely invading into the interior of the machine body.

The sealing device of the existing hydraulic cylinder is characterized in that a clamping groove is formed in the joint of a cylinder body and a piston rod of the hydraulic cylinder, and then a sealing rubber ring is arranged in the clamping groove.

SUMMERY OF THE UTILITY MODEL

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

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a sealing device of pneumatic cylinder, includes the cylinder body, first opening has been seted up to cylinder body one end, the inside piston rod that is equipped with of cylinder body, the one end fixed surface that the piston rod is located the cylinder body overlaps there is the piston, the cylinder body is close to first opening part and is equipped with the seal cover, the second opening has been seted up at the seal cover middle part, inside first annular fixture block and the second annular fixture block of being equipped with of seal cover, the seal cover is close to second opening part and first annular fixture block and is close to second opening one side and has seted up first seal groove jointly, the second seal groove has been seted up jointly to first annular fixture block and second annular fixture block junction inner circle, the third seal groove has been seted up jointly to second annular fixture block and first opening junction.

Furthermore, a clamping groove is formed in the outer side wall of the piston, a Glay ring is arranged inside the clamping groove, and the outer side wall of the Glay ring is tightly attached to the inner side wall of the cylinder body.

Further, a plurality of overlap joint grooves are formed in one end, close to the seal sleeve, of the outer side wall of the cylinder body, a plurality of second threaded holes are formed in the bottom wall in the overlap joint grooves, a plurality of overlap joint plates are fixedly connected to one side, close to the cylinder body, of the seal sleeve, a plurality of first threaded holes are formed in the middle of the overlap joint plates, and screws are jointly arranged in the first threaded holes and the second threaded holes.

Furthermore, the piston rod is kept away from one end of the piston and is respectively in sliding connection with the first opening, the second annular fixture block inner ring, the first annular fixture block inner ring and the second opening, a dust ring is arranged in the first sealing groove, and the inner side wall of the dust ring is tightly attached to the outer surface of the piston rod.

Furthermore, a first sealing rubber ring is arranged in the second sealing groove, and the inner side wall of the first sealing rubber ring is tightly attached to the outer surface of the piston rod.

Furthermore, a second sealing rubber ring is arranged in the third sealing groove, and the inner side wall of the second sealing rubber ring is tightly attached to the outer surface of the piston rod.

The utility model has the beneficial effects that:

when the hydraulic cylinder is used, the dust ring, the first sealing rubber ring and the second sealing rubber ring are fixed through the first annular fixture block and the second annular fixture block, so that the dust ring, the first sealing rubber ring and the second sealing rubber ring are tightly attached to the piston rod, the sealing performance between the cylinder body and the piston rod is improved, the sealing sleeve is convenient to detach from one end of the cylinder body, the dust ring, the first sealing rubber ring and the second sealing rubber ring inside the cylinder body are taken out to replace, and the sealing effect of the hydraulic cylinder is guaranteed all the time.

Drawings

FIG. 1 is a perspective view of the cylinder of the present invention;

FIG. 2 is a main sectional view of the present invention;

figure 3 is a perspective view of the sealing sleeve of the present invention;

FIG. 4 is a perspective view of a first annular cartridge of the present invention;

fig. 5 is a perspective view of a second annular latch of the present invention.

Illustration of the drawings:

1. a cylinder body; 2. a first opening; 3. a piston rod; 4. a piston; 5. a card slot; 6. a Glare circle; 7. sealing sleeves; 8. a second opening; 9. a first annular fixture block; 10. a second annular fixture block; 11. a lap joint groove; 12. a lap plate; 13. a first threaded hole; 14. a second threaded hole; 15. a screw; 16. a first seal groove; 17. a second seal groove; 18. a third seal groove; 19. a dust ring; 20. a first sealing rubber ring; 21. and a second sealing rubber ring.

Detailed Description

Fig. 1 to 5 show, a sealing device for a hydraulic cylinder is related to, including cylinder body 1, first opening 2 has been seted up to 1 one end of cylinder body, 1 inside piston rod 3 that is equipped with of cylinder body, the one end fixed surface that piston rod 3 is located cylinder body 1 overlaps has piston 4, cylinder body 1 is close to first opening 2 department and is equipped with seal cover 7, second opening 8 has been seted up at the middle part of seal cover 7, inside first annular fixture block 9 and the second annular fixture block 10 of being equipped with of seal cover 7, seal cover 7 is close to second opening 8 department and first annular fixture block 9 and is close to second opening 8 one side and has seted up first seal groove 16 jointly, second seal groove 17 has been seted up jointly to first annular fixture block 9 and second annular fixture block 10 junction inner circle, third seal groove 18 has been seted up jointly to second annular fixture block 10 and first opening 2 junction.

When the sealing device of the hydraulic cylinder is used, firstly, a dust ring 19 is clamped in a first sealing groove 16 at the position of a second opening 8, then a first annular fixture block 9 is placed in a sealing sleeve 7, then a first sealing rubber ring 20 is clamped in a second sealing groove 17 at the inner ring of the first annular fixture block 9, then a second annular fixture block 10 is placed in the sealing sleeve 7, then a second sealing rubber ring 21 is clamped in a third sealing groove 18 at the inner ring of the second annular fixture block 10, finally the sealing sleeve 7 provided with the first annular fixture block 9 and the second annular fixture block 10 is installed on the cylinder body 1, so that a lap joint plate 12 is clamped with a lap joint groove 11, the sealing sleeve 7 and the cylinder body 1 are fixedly connected together by screwing a screw 15, at the moment, the dust ring 19, the first sealing rubber ring 20 and the second sealing rubber ring 21 are tightly attached to the surface of the piston rod 3, when the cylinder body 1 works, the piston rod 3 can continuously enter and exit from the cylinder body 1, and dust ring 19, first rubber seal ring 20 and second rubber seal ring 21 then can play sealed effect, and when this pneumatic cylinder live time overlength, can dismantle seal cover 7, then take out first annular fixture block 9 and second annular fixture block 10 to it can to change dust ring 19, first rubber seal ring 20 and second rubber seal ring 21.

In the further scheme, the outer side wall of the piston 4 is provided with a clamping groove 5, the clamping groove 5 is internally provided with a Glae ring 6, the outer side wall of the Glae ring 6 is tightly attached to the inner side wall of the cylinder body 1, and the sealing performance between the piston 4 and the inner side wall of the cylinder body 1 is improved.

In the further scheme, a plurality of overlap joint grooves 11 have been seted up to 1 lateral wall of cylinder body near 7 one end of seal cover, and second screw hole 14 has all been seted up to the diapire in a plurality of overlap joint grooves 11, and a plurality of overlap joint boards 12 of one side fixedly connected with that seal cover 7 is close to cylinder body 1, and first screw hole 13 has all been seted up at a plurality of overlap joint board 12 middle parts, and first screw hole 13 is equipped with screw 15 with second screw hole 14 is inside jointly, is convenient for install seal cover 7 on cylinder body 1 fast.

In the further scheme, the end of the piston rod 3, which is far away from the piston 4, is respectively in sliding connection with the first opening 2, the inner ring of the second annular fixture block 10, the inner ring of the first annular fixture block 9 and the second opening 8, the dust ring 19 is arranged inside the first sealing groove 16, the inner side wall of the dust ring 19 is tightly attached to the outer surface of the piston rod 3, the sealing performance is improved, and dust outside the cylinder body 1 is prevented from entering the cylinder body 1.

In the further scheme, a first sealing rubber ring 20 is arranged in the second sealing groove 17, the inner side wall of the first sealing rubber ring 20 is tightly attached to the outer surface of the piston rod 3, and the sealing performance between the piston rod 3 and the sealing sleeve 7 is further improved.

In the further scheme, third seal groove 18 is inside to be equipped with second rubber seal 21, and the inseparable laminating of second rubber seal 21 inside wall and piston rod 3 surface increases the leakproofness, prevents that the inside oily medium of cylinder body 1 from revealing.

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. The utility model provides a sealing device of pneumatic cylinder, includes cylinder body (1), its characterized in that: one end of the cylinder body (1) is provided with a first opening (2), a piston rod (3) is arranged in the cylinder body (1), a piston (4) is fixedly sleeved on the surface of one end of the piston rod (3) positioned in the cylinder body (1), a sealing sleeve (7) is arranged on the cylinder body (1) near the first opening (2), a second opening (8) is formed in the middle of the sealing sleeve (7), a first annular clamping block (9) and a second annular clamping block (10) are arranged inside the sealing sleeve (7), a first sealing groove (16) is formed at the position of the sealing sleeve (7) close to the second opening (8) and at one side of the first annular clamping block (9) close to the second opening (8), a second sealing groove (17) is formed in the inner ring of the joint of the first annular clamping block (9) and the second annular clamping block (10), and a third sealing groove (18) is formed at the joint of the second annular fixture block (10) and the first opening (2).

2. The sealing device for a hydraulic cylinder according to claim 1, wherein: the outer side wall of the piston (4) is provided with a clamping groove (5), a GRILET ring (6) is arranged inside the clamping groove (5), and the outer side wall of the GRILET ring (6) is tightly attached to the inner side wall of the cylinder body (1).

3. The sealing device for a hydraulic cylinder according to claim 1, wherein: cylinder body (1) lateral wall is close to seal cover (7) one end and has seted up a plurality of overlap joint grooves (11), and is a plurality of second screw hole (14) have all been seted up to diapire in overlap joint groove (11), one side fixedly connected with a plurality of overlap joint boards (12) that seal cover (7) are close to cylinder body (1), and is a plurality of first screw hole (13) have all been seted up at overlap joint board (12) middle part, first screw hole (13) are equipped with screw (15) with second screw hole (14) inside jointly.

4. The sealing device for a hydraulic cylinder according to claim 1, wherein: piston (4) was kept away from in piston rod (3) one end respectively with first opening (2), second annular fixture block (10) inner circle, first annular fixture block (9) inner circle and second opening (8) sliding connection, first seal groove (16) inside is equipped with dust ring (19), dust ring (19) inside wall closely laminates with piston rod (3) surface.

5. The sealing device for a hydraulic cylinder according to claim 1, wherein: second seal groove (17) inside is equipped with first seal rubber ring (20), first seal rubber ring (20) inside wall is closely laminated with piston rod (3) surface.

6. The sealing device for a hydraulic cylinder according to claim 1, wherein: the third seal groove (18) is internally provided with a second seal rubber ring (21), and the inner side wall of the second seal rubber ring (21) is tightly attached to the outer surface of the piston rod (3).