CN213684765U - Sealing device for cylinder - Google Patents

Abstract

The application relates to a sealing device for cylinder is applied to cylinder technical field, and it establishes the seal structure on the cylinder piston rod including the cover, the one end that seal structure is close to the cylinder main part is equipped with the connecting piece, the spread groove has been seted up in the cylinder main part, the connecting piece is pegged graft in the spread groove. This application can realize seal structure detachable purpose through the connecting piece to the operator changes seal structure, has guaranteed the leakproofness of cylinder, and then prolongs the life of cylinder, has reduced manufacturing cost.

Description

Sealing device for cylinder

Technical Field

The application relates to the technical field of cylinders, in particular to a sealing device for a cylinder.

Background

At present, an air cylinder is widely applied to various fields as a driving device, the working principle of the air cylinder is to convert pressure energy of compressed air into mechanical energy, a driving mechanism performs linear reciprocating motion, swinging and rotating motion, and the mechanical energy is generated by the compressed air, so the design quality of an air cylinder sealing structure is an important index for measuring the quality of the air cylinder, and the sealing structure used at present mainly takes a sealing gasket as a main part.

In the using process of the air cylinder, a piston rod of the air cylinder needs to continuously rub with the sealing gasket, so that the sealing gasket is easily abraded, the sealing failure is caused, the service life of the air cylinder is seriously shortened, an operator hardly replaces the sealing gasket, and the production cost is greatly improved.

SUMMERY OF THE UTILITY MODEL

In order to improve the inconvenient problem of operator to sealed pad change, this application provides a sealing device for cylinder.

The application provides a sealing device for cylinder adopts following technical scheme:

the sealing device for the cylinder comprises a sealing structure sleeved on a cylinder piston rod, wherein a connecting piece is arranged at one end, close to a cylinder main body, of the sealing structure, a connecting groove is formed in the cylinder main body, and the connecting piece is inserted into the connecting groove in an inserting mode.

Through adopting the above-mentioned technical scheme, the operator is when installation seal structure, the operator establishes the piston rod of cylinder with the seal structure cover earlier, then the operator aligns connecting piece and spread groove, and peg graft the connecting piece in the spread groove, make the connecting piece fix seal structure, thereby be convenient for the quick convenient installation seal structure of operator, and then increased seal structure's stability, operator's reverse operation can take out the connecting piece from the spread groove, with realize seal structure detachable purpose, thereby be convenient for the operator to change seal structure, and then guaranteed the leakproofness of cylinder, with the life of extension cylinder, and the production cost is reduced.

Optionally, the seal structure includes that the cover locates the location section of thick bamboo on the piston rod, the location section of thick bamboo includes the sleeve pipe, the equal threaded connection in both ends along length direction of sleeve pipe has one to keep off the ring, the sleeve pipe is equipped with between two fender rings and contradicts the sealed pad on the piston rod.

Through adopting above-mentioned technical scheme, the operator is at the sealed in-process of installation, the operator is fixed with the fender ring of a location section of thick bamboo one end earlier, then the operator will seal up to place the intraductal, then the operator keeps off the ring with another and fixes to the sleeve pipe again, in order to reach the effect of fixed seal pad, thereby realize the sealed purpose of installing fast sealed pad, the operator establishes the location cover on the piston rod this moment, and be fixed in cylinder main part with a location section of thick bamboo, it fills up to make sealed the clearance between piston rod and the sleeve pipe full, thereby realize sealed cylinder's purpose, the reverse operator of operator can take off a location section of thick bamboo from the piston rod, it can take out sealed pad from the sleeve pipe to open and keep off the ring, thereby realize the sealed purpose of dismantling fast sealed pad, and then be convenient for.

Optionally, sealed the slip setting of pad in the cover, sealed both ends along length direction of filling up all are equipped with a set of spring, the one end of spring is contradicted on the sealing pad, the other end contradict in keep off and encircle.

Through adopting above-mentioned technical scheme, the piston rod of cylinder is stretching out or the in-process of shrink, the piston rod area produces the friction with sealed the pad, and drive sealed the pad and compress the spring, the spring has elastic restoring force by compression, and the spring is under the effect of spring restoring force, the spring can cushion the energy-absorbing to sealed the pad, and slow release energy, thereby the spring has played the effect of buffering sealed pad, and then reduce the damage that sealed pad brought when the piston rod removes in the twinkling of an eye, with the sealed life who fills up of extension.

Optionally, the baffle ring is close to the lateral wall of piston rod and has seted up the annular along the peripheral direction, the embedded sealing ring that is equipped with and offsets with the piston rod of annular.

Through adopting above-mentioned technical scheme, set up the sealing ring and can fill up the clearance between fender ring and the piston rod to further increased the leakproofness between a location section of thick bamboo and the piston rod, and then promoted the gas tightness of cylinder, when wearing and tearing appear as the sealing ring simultaneously, the sealing ring can reach automatic compensation's effect, makes the sealing ring laminate on the piston rod all the time, in order to reduce the possibility that a location section of thick bamboo appears leaking gas.

Optionally, a rubber pad is embedded on the baffle ring close to the cylinder body, the rubber pad is arranged on one side of the baffle ring close to the cylinder body, and the rubber pad is abutted to the cylinder body.

Through adopting above-mentioned technical scheme, when a location section of thick bamboo fastening was in cylinder main body, the rubber pad can be filled up the clearance between a location section of thick bamboo and the cylinder main body to further increase the leakproofness between a location section of thick bamboo and the cylinder main body, with the possibility that reduces to appear leaking gas between cylinder main body and the location section of thick bamboo.

Optionally, the connecting piece includes a positioning block fixed on the sealing structure, a positioning rod is inserted into the positioning block, one end of the positioning rod is inserted into the connecting groove, and a locking block is connected to the positioning rod through a thread on one side of the positioning block away from the connecting groove; the positioning rod is symmetrically provided with two abutting plates along the peripheral direction, one side of each abutting plate close to the positioning rod is hinged with a connecting rod inclined towards the bottom wall of the connecting groove, and one end, far away from the abutting plates, of each connecting rod is hinged to the positioning rod.

Through adopting above-mentioned technical scheme, the operator is at fixed seal structure's in-process, the operator is earlier with the locating lever with support tight piece together peg graft in the spread groove, the operator rotates the latch segment after that, latch segment drive locating lever this moment is to keeping away from one side removal of spread groove diapire, and the locating lever passes through the connecting rod and promotes to support tight piece and be close to the lateral wall of spread groove, until supporting tight board and support tightly on the lateral wall of spread groove, thereby realize fixed seal structure's purpose, the operator continues to rotate the latch segment, the latch segment can promote seal structure through the locating piece and support tightly on cylinder main part, with the leakproofness between increase seal structure and the cylinder.

Optionally, the open end of the connecting groove is provided with an inwardly extending limiting ring along the circumferential direction.

Through adopting above-mentioned technical scheme, when supporting tight board and supporting tightly on the inner wall of spread groove, support the one end that tight board kept away from the spread groove diapire and contradict on the spacing ring, the spacing ring is spacing to supporting the piece this moment to increase the firm in connection nature of supporting tight piece and spread groove, and then reduce and support the condition emergence that tight board breaks away from in the spread groove.

Optionally, a tension spring is arranged between the abutting plate and the positioning rod, one end of the tension spring is fixed on the abutting plate, and the other end of the tension spring is fixed on the positioning rod.

Through adopting above-mentioned technical scheme, support tight board when being close to the spread groove lateral wall, support tight board and stretch the extension spring, the extension spring is stretched and is had elastic shrinkage power, when the operator need dismantle seal structure, the operator reverse rotation locking piece, the extension spring is under the effect of elastic shrinkage power this moment, the extension spring pulling is supported tight board and is close to the locating lever, thereby reduce and support between tight board and the locating lever apart from, and then the operator of being convenient for takes out the locating lever from the spread groove, so that the operator dismantles seal structure.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the purpose of detachable sealing structure can be realized through the connecting piece, so that an operator can conveniently replace the sealing structure, the sealing property of the air cylinder is ensured, the service life of the air cylinder is further prolonged, and the production cost is reduced;

2. the sealing gasket is buffered by the spring, so that damage to the sealing gasket caused by instant movement of the piston rod can be reduced, and the service life of the sealing gasket is prolonged;

3. the tight plate is tightly abutted on the side wall of the connecting groove, so that the purpose of fixing the sealing structure can be realized.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a schematic structural diagram for embodying the connecting member according to the embodiment of the present application.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

Description of reference numerals: 1. a cylinder main body; 11. a piston rod; 12. a front end cover; 121. connecting grooves; 122. a limiting ring; 13. a cylinder body; 14. a rear end cap; 2. a sealing structure; 21. a positioning cylinder; 22. a sleeve; 23. a baffle ring; 231. a ring groove; 24. a gasket; 25. a spring; 26. a seal ring; 27. a rubber pad; 3. a connecting member; 31. positioning blocks; 32. positioning a rod; 33. a locking block; 34. a propping plate; 35. a connecting rod; 36. a tension spring.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses sealing device for cylinder. Referring to fig. 1, the sealing device includes a sealing structure 2 provided on a cylinder body 1 and a connecting member 3 fixed to the sealing structure 2. The cylinder body 1 comprises a cylinder body 13, a piston rod 11, a front end cover 12 and a rear end cover 14, wherein the piston rod 11 is arranged in the cylinder body 13 in a sliding mode, and the rear end cover 14 is arranged at one end of the cylinder body 13 in the length direction. The front end cover 12 is arranged at one end of the cylinder 13 far away from the rear end cover 14, and the piston rod 11 is arranged on the front end cover 12 in a penetrating way. The sealing structure 2 is sleeved on the piston rod 11, and one end of the sealing structure close to the front end cover 12 abuts against the front end cover 12. Two connecting grooves 121 are symmetrically formed in the front end cover 12 along the circumferential direction of the piston rod 11, two connecting pieces 3 are symmetrically arranged along the circumferential direction of the sealing structure 2, and the connecting pieces 3 are inserted into the connecting grooves 121.

Referring to fig. 1 and 2, the operator is at the in-process of installation seal structure 2, and the operator establishes piston rod 11 with seal structure 2 cover earlier, and the operator promotes seal structure 2 and is close to front end cover 12 afterwards to peg graft connecting piece 3 in connecting groove 121, make connecting piece 3 fix seal structure 2, thereby make seal structure 2 reach sealed cylinder's effect, and then connecting piece 3 is convenient for quick convenient installation seal structure 2 of operator. Operator's reverse operation can take out connecting piece 3 from connecting groove 121 to the operator takes off seal structure 2 from piston rod 11 fast convenient, thereby realizes quick assembly disassembly seal structure 2's purpose, and then the operator of being convenient for changes seal structure 2, with the life of extension cylinder.

Referring to fig. 2 and 3, the sealing structure 2 includes a positioning tube 21 sleeved on the piston rod 11, the positioning tube 21 includes a sleeve 22 sleeved on the piston rod 11, both ends of the sleeve 22 along the length direction are both connected with a retaining ring 23 by screw threads, and the sleeve 22 and the two retaining rings 23 are both sleeved on the piston rod 11. The sleeve 22 is provided with a sealing gasket 24 between the two retaining rings 23, and the sealing gasket 24 is sleeved on the piston rod 11. The gasket 24 is made of rubber, and the rubber itself is soft and elastic and is easily deformed. When the operator sleeves the sleeve 22 on the piston rod 11, the sealing pad 24 may seal the gap between the sleeve 22 and the piston rod 11. At the same time, the operator removes the sleeve 22 and removes the gasket 24 from the connection tube to facilitate replacement of the gasket 24 by the operator.

Referring to fig. 2 and 3, the sealing gasket 24 is slidably disposed in the sleeve 22, a set of springs 25 is disposed at both ends of the sleeve 22 along the length direction of the sealing gasket 24, and a plurality of springs are uniformly distributed on the same set of springs 25 along the circumferential direction of the sleeve 22. And one end of the spring 25 is fixed to the stopper ring 23 and the other end abuts against the packing 24. When the retainer 23 is secured to the sleeve 22, the spring 25 is in a partially compressed state. In the process that the piston rod 11 moves in the twinkling of an eye, produce friction between piston rod 11 and the sealed pad 24 to drive sealed pad 24 and continue to compress spring 25, spring 25 is compressed and has elastic restoring force, and spring 25 is under the effect of elastic restoring force, and spring 25 cushions the energy-absorbing to sealed pad 24, in order to reduce the damage that the in-process that spring 25 moved in the twinkling of an eye brought sealed pad 24, thereby prolonged sealed pad 24's life.

Referring to fig. 2 and 3, the stopper ring 23 has a ring groove 231 formed on an inner wall thereof adjacent to the piston rod 11, and the ring groove 231 is formed along a circumferential direction of the stopper ring 23. The ring groove 231 is embedded with a sealing ring 26 which is in contact with the piston rod 11, the sealing ring 26 is a hollow ring body, and the cross section of the sealing ring 26 is oval. Meanwhile, a rubber pad 27 is embedded in the side of the baffle ring 23 close to the front end cover 12 and away from the sleeve 22, and the rubber pad 27 is arranged along the circumferential direction of the piston rod 11. The sealing ring 26 and the rubber pad 27 are both made of rubber, the sealing ring 26 can further seal the gap between the positioning cylinder 21 and the piston rod 11, and when the sealing ring 26 is worn, the sealing ring 26 can automatically compensate to ensure the sealing performance between the positioning cylinder 21 and the piston rod 11. Meanwhile, the rubber pad 27 can fill up the gap between the positioning cylinder 21 and the front end cover 12, so that the sealing performance between the positioning cylinder 21 and the front end cover 12 is increased, and the possibility of air leakage of the cylinder is reduced.

Referring to fig. 1 and 2, the connecting member 3 includes a positioning block 31 fixed on the sleeve 22, the positioning block 31 is disposed at one end of the sleeve 22 close to the front end cover 12, a positioning rod 32 is disposed on the positioning block 31, and an axis of the positioning rod 32 is parallel to an axis of the piston rod 11. The one end that the locating lever 32 is close to front end housing 12 is pegged graft in connecting groove 121 to the one end that the locating lever 32 is located connecting groove 121 is equipped with two along the circumferencial direction symmetry and supports tight board 34, supports the articulated connecting rod 35 to the slope of connecting groove 121 bottom wall in one side that tight board 34 is close to the locating lever 32, and the one end that tight board 34 was kept away from to connecting rod 35 articulates on locating lever 32. Meanwhile, a tension spring 36 is fixedly connected to one side of the tightening plate 34, which is far away from one end of the bottom wall of the connecting groove 121 and is close to the positioning rod 32, and one end of the tension spring 36, which is far away from the tightening plate 34, is fixed to the positioning rod 32. The positioning rod 32 is screwed with a locking block 33 on the side of the positioning block 31 away from the front end cover 12.

Referring to fig. 1 and 2, when the operator fixes the sleeve 22, the operator inserts the positioning rod 32 and the abutting plate 34 together into the coupling groove 121. The operator then rotates the locking block 33 so that the locking block 33 drives the positioning rod 32 to move to the side away from the bottom wall of the connecting groove 121. At this time, the positioning rod 32 pushes the abutting plate 34 to gradually approach the side wall of the connecting groove 121 through the connecting rod 35 until the abutting plate 34 abuts against the side wall of the connecting groove 121, so as to achieve the effect of fixing the positioning block 31, thereby achieving the purpose of fixing the sleeve 22. Meanwhile, in the process that the abutting plate 34 approaches the side wall of the connecting groove 121, the abutting plate 34 stretches the tension spring 36, and the tension spring 36 is stretched to have elastic contraction force. When the operator needs to disassemble the positioning cylinder 21, the operator reversely rotates the locking block 33. At this time, under the action of the elastic contraction force of the tension spring 36, the tension spring 36 pulls the abutting plate 34 to approach the positioning rod 32 quickly, so that the abutting plate 34 is reset quickly.

Referring to fig. 1 and 2, the connecting groove 121 is provided with an inwardly extending limiting ring 122 at an end away from the bottom wall, and the limiting ring 122 is disposed along the circumferential direction of the positioning groove. When the tightening plate 34 is tightened on the side wall of the connecting groove 121, the tightening plate 34 is tightened against the limiting ring 122, and the limiting ring 122 limits the tightening plate 34 at this time, so as to increase the connection stability between the tightening plate 34 and the connecting groove 121, and further reduce the occurrence of the situation that the tightening plate 34 is separated from the connecting groove 121. Meanwhile, when the operator continues to rotate the locking block 33, the locking block 33 pushes the positioning cylinder 21 to abut against the front end cover 12 through the positioning block 31, and the sealing performance between the positioning cylinder 21 and the front end cover 12 is further improved.

The implementation principle of the embodiment of the application is as follows: when the operator installs the seal structure 2, the operator first places the seal gasket 24 in the sleeve 22, and then fixes the seal gasket 24 by the retainer ring 23. Then, the operator sleeves the positioning cylinder 21 on the piston rod 11, and simultaneously inserts the positioning rod 32 and the abutting plate 34 into the connecting groove 121. At this moment, the operator rotates the locking block 33, the locking block 33 drives the positioning rod 32 to move towards one side far away from the connecting groove 121 until the abutting plate 34 abuts against the side wall of the connecting groove 121, so as to achieve the effect of fixing and positioning the barrel 21, so that the positioning barrel 21 abuts against the front end cover 12, and the operator can install the positioning barrel 21 quickly and conveniently, and the operator can seal the cylinder conveniently. When an operator needs to disassemble the positioning cylinder 21, the operator can take the abutting plate 34 out of the connecting groove 121 by reversely rotating the locking block 33, so that the operator can disassemble the positioning cylinder 21 conveniently, and the operator can replace the sealing gasket 24 conveniently.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (7)

1. A sealing device for a cylinder is characterized in that: comprises a sealing structure (2) sleeved on a cylinder piston rod (11), a connecting piece (3) is arranged at one end of the sealing structure (2) close to a cylinder main body (1), the cylinder main body (1) is provided with a connecting groove (121), the connecting piece (3) is inserted in the connecting groove (121),

seal structure (2) are including locating a location section of thick bamboo (21) on piston rod (11) are located to the cover, a location section of thick bamboo (21) are including sleeve pipe (22), sleeve pipe (22) have one to keep off ring (23) along length direction's the equal threaded connection in both ends, sleeve pipe (22) are equipped with between two fender rings (23) and contradict sealed pad (24) on piston rod (11).

2. The sealing device for a cylinder according to claim 1, characterized in that: sealed pad (24) slide to set up in sleeve pipe (22), sealed pad (24) all are equipped with a set of spring (25) along length direction's both ends, the one end of spring (25) is contradicted on sealed pad (24), the other end contradict in keep off on ring (23).

3. The sealing device for a cylinder according to claim 1, characterized in that: keep off ring (23) and be close to the lateral wall of piston rod (11) and seted up annular (231) along the peripheral direction, annular (231) embedded be equipped with piston rod (11) inconsistent sealing ring (26).

4. The sealing device for a cylinder according to claim 1, characterized in that: be close to inlay on the fender ring (23) of cylinder main part (1) and be equipped with rubber pad (27), rubber pad (27) set up and are being close to one side of cylinder main part (1) in fender ring (23), rubber pad (27) are contradicted on cylinder main part (1).

5. The sealing device for a cylinder according to claim 1, characterized in that: the connecting piece (3) comprises a positioning block (31) fixed on the sealing structure (2), a positioning rod (32) penetrates through the positioning block (31), one end of the positioning rod (32) is inserted into the connecting groove (121), and a locking block (33) is in threaded connection with one side, far away from the connecting groove (121), of the positioning rod (32) on the positioning block (31);

the positioning rod (32) is symmetrically provided with two abutting plates (34) along the peripheral direction, one side, close to the positioning rod (32), of each abutting plate (34) is hinged to a connecting rod (35) inclined towards the bottom wall of each connecting groove (121), and one end, far away from each abutting plate (34), of each connecting rod (35) is hinged to the corresponding positioning rod (32).

6. The sealing device for a cylinder according to claim 5, wherein: the open end of the connecting groove (121) is provided with a limiting ring (122) extending inwards along the peripheral direction.

7. The sealing device for a cylinder according to claim 5, wherein: a tension spring (36) is arranged between the abutting plate (34) and the positioning rod (32), one end of the tension spring (36) is fixed on the abutting plate (34), and the other end of the tension spring is fixed on the positioning rod (32).

Images