CN116044860B

CN116044860B - Hydraulic cylinder with dustproof structure

Info

Publication number: CN116044860B
Application number: CN202310200386.XA
Authority: CN
Inventors: 陈志荣; 陈钰; 侯万久
Original assignee: Wuxi Yushen Hydraulic Machinery Co ltd
Current assignee: Wuxi Yushen Hydraulic Machinery Co ltd
Priority date: 2023-03-06
Filing date: 2023-03-06
Publication date: 2023-06-09
Anticipated expiration: 2043-03-06
Also published as: CN116044860A

Abstract

The application provides a pneumatic cylinder with dustproof construction belongs to pneumatic cylinder technical field. The hydraulic cylinder with the dustproof structure comprises a cylinder body, a piston rod and a limiting seat. The end part of the cylinder body is provided with a mounting hole, a guide sleeve is mounted in a groove of the mounting hole, a mounting groove is formed in one side of the guide sleeve, and a sealing dustproof piece is inserted into the groove of the mounting groove; the piston rod is inserted into the sealing dustproof piece in a sliding mode, and the inner wall of the sealing dustproof piece is in sealing fit with the piston rod. This application improves the leakproofness between cylinder body and the piston rod through uide bushing and sealed dust keeper cooperation, can avoid the dust to enter into in the cylinder body between uide bushing and the piston rod, reaches dirt-proof effect, and sealed dust keeper adopts the mode of pegging graft to install to it is spacing to sealed dust keeper to cooperate by fixture block, spacing seat and elastic component, do benefit to and dismantle sealed dust keeper, make the change of sealed dust keeper more convenient.

Description

Hydraulic cylinder with dustproof structure

Technical Field

The application relates to the field of hydraulic cylinders, in particular to a hydraulic cylinder with a dustproof structure.

Background

In general, a hydraulic cylinder is basically composed of a cylinder tube and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device, and other devices are indispensable depending on the specific application.

The piston rod in the pneumatic cylinder can move in the use of pneumatic cylinder, and can set up sealed uide bushing through between piston rod and the cylinder, not only be used for avoiding revealing of hydraulic oil, can also reach dirt-proof effect, but the sealing element in the sealed uide bushing is inconvenient to dismantle, change, and after the pneumatic cylinder uses for a long time, the sealing element appears wearing and tearing easily, does not change, can influence the use of pneumatic cylinder.

Disclosure of Invention

In order to overcome the defects, the application provides the hydraulic cylinder with the dustproof structure, and aims to solve the problem that a sealing element is inconvenient to replace.

The embodiment of the application provides a pneumatic cylinder with dustproof construction, including cylinder body, piston rod and spacing seat. The end part of the cylinder body is provided with a mounting hole, a guide sleeve is mounted in a groove of the mounting hole, a mounting groove is formed in one side of the guide sleeve, and a sealing dustproof piece is inserted into the groove of the mounting groove; the piston rod is inserted into the sealing dustproof piece in a sliding manner, and the inner wall of the sealing dustproof piece is in sealing fit with the piston rod; the limiting seat is in sliding connection in the groove of the mounting hole, an elastic piece is arranged in the limiting seat, a clamping block is fixed on one side of the elastic piece, one end of the clamping block penetrates through the limiting seat in a sliding manner, a clamping groove corresponding to the clamping block is formed in the end portion of the cylinder body, the clamping groove is communicated with the mounting hole, and one end of the clamping block is in sliding connection in the groove of the corresponding clamping groove.

In the realization process, the guide sleeve and the sealing dustproof piece are used for improving the tightness between the cylinder body and the piston rod, when the piston rod moves, dust can be prevented from entering the cylinder body between the guide sleeve and the piston rod, the dustproof effect is achieved, the sealing dustproof piece is installed in an inserting mode, after the clamping block is recycled to the inside of the limiting seat, the limiting seat can be pulled out from the installation hole, and the sealing dustproof piece can be detached, so that the sealing dustproof piece is more convenient to replace.

In a specific embodiment, a piston head is slidably mounted within the cylinder and the end of the piston rod is fixedly connected to the piston head.

In the implementation process, the connecting part of the piston head and the piston rod is integrally formed, so that the connecting strength between the piston head and the piston rod can be improved, and the piston head can drive the piston rod to move when moving in the cylinder body.

In a specific embodiment, the cross-sectional area of the piston head is larger than the bore area of the mounting bore, and the side wall of the piston head sealingly engages the inner wall of the cylinder.

In the implementation process, the piston head can be prevented from sliding out through the mounting hole, and the piston head can move in the cylinder body more conveniently.

In a specific embodiment, the mounting hole is a counter bore, and the lower end surface of the limiting seat is tightly attached to the sealing dust-proof piece.

In the implementation process, the outer wall of the sealing dustproof piece is in sealing fit with the inner wall of the guide sleeve, so that the sealing effect between the guide sleeve and the piston rod can be improved.

In a specific embodiment, the sealing dust-proof piece comprises a lower sealing ring and an upper sealing ring, the lower sealing ring is slidably inserted into the groove of the mounting groove, the upper sealing ring is fixedly connected with the upper end face of the lower sealing ring, the surface of the upper sealing ring is fixedly sleeved with a limiting ring, the lower end face of the limiting ring is fixedly connected with the lower sealing ring, and the upper end face of the limiting ring is attached to the lower end face of the limiting seat.

In the implementation process, the limiting ring can be made of hard materials and is used for limiting the deformation amplitude of the lower sealing ring and the upper sealing ring, so that the use of the lower sealing ring and the upper sealing ring is facilitated.

In a specific embodiment, one end of the piston rod sequentially slides through the inner parts of the lower sealing ring and the upper sealing ring, and the inner wall of the lower sealing ring and the inner wall of the upper sealing ring are in sealing fit with the piston rod.

In the implementation process, the sealing performance between the piston rod and the guide sleeve can be improved by the lower sealing ring and the upper sealing ring.

In a specific embodiment, the lower sealing ring, the upper sealing ring and the limiting ring are coaxially arranged, and the joint of the lower sealing ring and the upper sealing ring is integrally formed.

In the realization process, the integrated forming design can improve the connection strength between the lower sealing ring and the upper sealing ring, and is more beneficial to the use of the lower sealing ring and the upper sealing ring.

In a specific embodiment, the inner diameter of the lower seal ring is the same as the inner diameter of the upper seal ring, and the outer diameter of the lower seal ring is greater than the outer diameter of the upper seal ring.

In the implementation process, the inner diameters are the same, so that the lower sealing ring and the upper sealing ring are beneficial to sealing the piston rod.

In a specific embodiment, a limiting strip is arranged in the limiting seat, the limiting strips are arranged in a pair of opposite directions, and the clamping blocks are located between the two corresponding clamping blocks.

In the implementation process, the limiting strip is arranged and used for limiting the moving direction of the clamping block, so that the clamping block can move more stably in the limiting seat.

In a specific embodiment, the elastic piece is a spring, and the limiting seat is a circular base with a hollowed upper end surface.

In the implementation process, the upper end face is hollowed out, so that the clamping block is conveniently installed in the limiting seat.

In a specific embodiment, the side wall of the limit seat is provided with a clamping protrusion, the end part of the cylinder body is provided with a slot, the inner wall of the end part of the cylinder body is provided with a sliding groove, the sliding groove is communicated with the slot, and the clamping protrusion is inserted into the groove of the sliding groove in a sliding manner through the slot.

In a specific embodiment, the cylinder body is communicated with two hydraulic oil conveying pipes, the two hydraulic oil conveying pipes are respectively located on two sides of the piston head, a valve core is rotatably installed between the two hydraulic oil conveying pipes, the two valve cores are fixedly connected through a valve rod, a shell is installed on the side wall of the cylinder body, a rotating shaft is installed in the shell, the rotating shaft is rotatably connected with one valve core, a first gear is connected with a rotating shaft key, a second gear is rotatably installed in the cylinder body, a third gear is fixedly sleeved on the lower end portion of the limiting seat, and the first gear and the third gear are in meshed transmission with the second gear.

In the implementation process, after the sealing dustproof piece is inserted into the groove of the mounting groove on the surface of the guide sleeve, the clamping block is stirred, so that the clamping block is recycled into the limiting seat, then the limiting seat and the third gear are inserted into the mounting hole, the clamping projection on the side wall of the limiting seat is inserted into the sliding groove through the slot, the tooth teeth of the third gear are meshed with the second tooth teeth, after the limiting seat is rotated, the clamping projection is rotated into the sliding groove, the clamping block moves to the corresponding clamping groove, after the clamping block is loosened, the clamping block is inserted into the clamping groove under the support of the elastic piece, the limiting seat drives the third gear to rotate, the first gear, the rotating shaft and the valve core are driven to rotate under the transmission of the second gear, so that the flow of the hydraulic oil conveying pipe can be changed, and after the clamping block is inserted into the corresponding clamping groove, the hydraulic oil conveying pipe is opened; when the clamping block moves out of the clamping groove and the clamping protrusion moves to the slot, the valve core closes the hydraulic oil conveying pipe, the limiting seat can limit the movement of the sealing dustproof piece when the limiting seat is fixed in the mounting hole, and the hydraulic oil conveying pipe is opened, so that the hydraulic cylinder with the dustproof structure can be normally used.

In a specific embodiment, two hydraulic oil delivery pipes are arranged in parallel, and both the hydraulic oil delivery pipes are hard pipes.

In the implementation process, the hard pipe fitting is used as the hydraulic oil conveying pipe, so that the hydraulic oil conveying pipe is more beneficial to use, and the hydraulic oil conveying pipe can be connected with a hydraulic oil station through an external pipeline.

In a specific embodiment, the shaft of the valve rod and the shaft of the rotating shaft are sleeved with sealing rings, one side of each sealing ring is fixedly connected with the corresponding hydraulic oil conveying pipe, and the shaft of the valve rod and the shaft of the rotating shaft are respectively in sealing fit with the corresponding inner wall of each sealing ring.

In the implementation process, the sealing ring is arranged, so that the tightness between the valve rod and the rotating shaft and the corresponding hydraulic oil conveying pipe can be improved.

In a specific embodiment, the third gear has a smaller cross-sectional area than the mounting hole and is slidably inserted into the mounting hole.

In the implementation process, the cross-section area of the third gear is limited, so that the third gear can be inserted into the mounting hole, the mounting of the third gear is facilitated, in addition, in the implementation process, the purpose of variable speed driving can be achieved by changing the gear ratio among the first gear, the second gear and the third gear, and the gear ratio among the first gear, the second gear and the third gear is determined according to practical situations.

In a specific embodiment, a cover plate is arranged at the top end of the limiting seat, a bolt is arranged on the surface of the cover plate, a screw sleeve is fixed in the limiting seat, a threaded section of the bolt penetrates through the cover plate in a sliding mode, the threaded section of the bolt is connected with the screw sleeve in a threaded mode, and the lower end face of the cover plate is tightly attached to the upper end face of the clamping block.

In the implementation process, the cover plate is arranged on the surface of the limiting seat in a threaded connection mode through the bolts and the threaded sleeves, so that the cover plate can limit the movement of the clamping block, and the movement of the clamping block is more stable.

In a specific embodiment, the upper end face of the clamping block is provided with a sliding block, the top end of the sliding block penetrates through the cover plate in a sliding mode, the top end of the sliding block is provided with a movable block, one side of the movable block is attached to the rod body of the piston rod, and the rod body of the piston rod is provided with an annular groove corresponding to the movable block.

In the realization process, the movable block is stirred to drive the sliding block and the clamping block to move, the rod body of the piston rod can limit the movement of the movable block, when the rod body of the piston rod, which is not provided with the annular groove, is contacted with the movable block, the piston rod can block the movement of the movable block, the sliding block and the clamping block, and when the piston rod is used, the annular groove on the surface of the piston rod is staggered with the movable block, the clamping block can be more stably inserted into the groove of the clamping groove when the piston rod is used conventionally, the limiting seat can be more stably arranged in the mounting hole, the limiting seat can be used for more stably limiting the movement of the sealing dust-proof piece, the sealing dust-proof piece is more stably arranged, and the possibility of falling off of the sealing dust-proof piece is reduced.

In a specific embodiment, the thickness of the sealing dust-proof piece is larger than the height of the annular groove, and the surface of the cover plate is provided with a through groove corresponding to the sliding block.

In the implementation process, the annular groove is sealed by the sealing dustproof piece.

The beneficial effects are that: the application provides a pneumatic cylinder with dustproof construction, improve the leakproofness between cylinder body and the piston rod by uide bushing and sealed dust keeper cooperation, can avoid the dust to enter into in the cylinder body between uide bushing and the piston rod, reach dirt-proof effect, and sealed dust keeper adopts the mode of pegging graft to install to it is spacing to sealed dust keeper to cooperate by fixture block, spacing seat and elastic component, do benefit to and dismantle sealed dust keeper, make the change of sealed dust keeper more convenient.

When the hydraulic cylinder is used, the hydraulic oil pipe is used for conveying oil in the hydraulic cylinder so as to control the piston to move, and when the sealing structure connected between the cylinder body and the piston of the hydraulic cylinder is disassembled, the hydraulic pipeline cannot be closed, the piston moves, the flow of hydraulic oil is easily caused, and the subsequent use of the hydraulic cylinder is affected.

After the sealing dustproof piece is inserted into the groove of the mounting groove on the surface of the guide sleeve, the clamping block is stirred, the clamping block is recycled into the limiting seat, then the limiting seat and the third gear are inserted into the mounting hole, the clamping projection on the side wall of the limiting seat is inserted into the sliding groove through the slot, the tooth teeth of the third gear are meshed with the second gear tooth teeth, after the limiting seat is rotated, the clamping projection is rotated into the sliding groove, the clamping block moves to the corresponding clamping groove, after the clamping block is loosened, the clamping block is supported by the elastic piece, the clamping block is inserted into the clamping groove, the limiting seat drives the third gear to rotate, the first gear, the rotating shaft and the valve core are driven to rotate under the transmission of the second gear, and then the hydraulic oil conveying pipe is opened.

When the sealing dustproof piece is dismounted, the clamping block is stirred, the clamping block is moved away from the groove of the clamping groove, then the limiting seat is rotated, the clamping protrusion on the side wall of the limiting seat is moved to the slot, the first gear, the rotating shaft and the valve core are driven to rotate under the matched transmission of the third gear and the second gear, the valve core can close the hydraulic oil conveying pipe, and then when the sealing dustproof piece is dismounted and replaced, the hydraulic oil in the cylinder body can be prevented from being discharged through the hydraulic oil conveying pipe, so that the possibility that the subsequent use of the hydraulic cylinder with the dustproof structure is influenced due to the flow of the hydraulic oil can be reduced.

When the sealing element in the hydraulic cylinder is installed in a detachable mode, the piston rod can easily drive the sealing element to move when moving, so that the sealing element falls off to influence the use of the sealing element.

The cover plate is arranged on the surface of the limit seat in a threaded connection mode through the bolts and the threaded sleeves, so that the cover plate can limit the movement of the clamping block, the movement of the clamping block is more stable, the clamping block can be more stably inserted into the groove of the clamping groove, and the fixing of the limit seat is facilitated;

the movable block can be driven to move by stirring the movable block, the rod body of the piston rod can limit the movement of the movable block, when the rod body of the piston rod, which is not provided with the annular groove, is contacted with the movable block, the piston rod can block the movement of the movable block, the annular groove on the surface of the piston rod is staggered with the movable block to limit the movement of the clamping block, the clamping block can be stably inserted into the groove of the clamping groove when the piston rod is used conventionally, the limiting seat can be stably installed in the installation hole, the limiting seat can stably limit the movement of the sealing dust-proof piece, the sealing dust-proof piece is stably installed, and the falling possibility of the sealing dust-proof piece is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present application and therefore should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a hydraulic cylinder with a dust-proof structure according to an embodiment of the present application;

fig. 2 is a schematic diagram of a cylinder structure according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a guide sleeve according to an embodiment of the present application;

FIG. 4 is a schematic view of a seal dust seal provided in an embodiment of the present application;

fig. 5 is a schematic view of a piston rod structure according to an embodiment of the present application;

fig. 6 is a schematic diagram of a connection structure between a limiting seat and a housing according to an embodiment of the present application;

fig. 7 is a schematic diagram of an internal structure of a limiting seat according to an embodiment of the present application;

fig. 8 is a schematic view of an internal structure of a housing according to an embodiment of the present application;

fig. 9 is a schematic view of a connection structure of an elastic member and a clamping block according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a cover plate according to an embodiment of the present application.

In the figure: 100-cylinder body; 110-mounting holes; 120-guiding sleeve; 130-mounting slots; 140-sealing the dust guard; 141-a lower seal ring; 142-upper sealing ring; 143-a limiting ring; 150-clamping grooves; 160-slots; 170-a chute; 200-a piston rod; 210-piston head; 220-annular groove; 300-limiting seats; 310-an elastic member; 320-clamping blocks; 321-a slider; 322-movable block; 330-limiting strips; 340-clamping convex; 350-a third gear; 360-screw sleeve; 400-hydraulic oil conveying pipe; 410-valve core; 420-valve stem; 430-a seal ring; 500-a housing; 510-a rotation axis; 520-a first gear; 530-a second gear; 600-cover plate; 610-bolts.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

Referring to fig. 1-10, the present application provides a hydraulic cylinder with a dustproof structure, which includes a cylinder body 100, a piston rod 200, and a limiting seat 300.

The piston rod 200 is slidably connected to the cylinder 100, and the limiting seat 300 is mounted at an end of the cylinder 100.

The end of the cylinder body 100 is provided with a mounting hole 110, a guide sleeve 120 is mounted in a groove of the mounting hole 110, a mounting groove 130 is formed in one side of the guide sleeve 120, and a sealing dust-proof piece 140 is inserted in the groove of the mounting groove 130;

the piston rod 200 is slidably inserted into the sealing dust-proof member 140, and the inner wall of the sealing dust-proof member 140 is in sealing fit with the piston rod 200;

the limiting seat 300 is slidably inserted into the groove of the mounting hole 110, an elastic piece 310 is mounted in the limiting seat 300, a clamping block 320 is fixed on one side of the elastic piece 310, one end of the clamping block 320 slidably penetrates through the limiting seat 300, a clamping groove 150 corresponding to the clamping block 320 is formed in the end of the cylinder body 100, the clamping groove 150 is communicated with the mounting hole 110, and one end of the clamping block 320 is slidably inserted into the groove of the corresponding clamping groove 150.

In the above-mentioned realization process, uide bushing 120 and sealed dust keeper 140 are used for improving the leakproofness between cylinder body 100 and the piston rod 200, when the piston rod 200 removes, can avoid the dust to enter into in cylinder body 100 through between uide bushing 120 and the piston rod 200, reach dirt-proof effect, and sealed dust keeper 140 adopts the mode of pegging graft to install, retrieve to spacing seat 300 inside at fixture block 320, can take spacing seat 300 out in follow mounting hole 110, alright dismantle sealed dust keeper 140, make the change of sealed dust keeper 140 more convenient.

In a specific embodiment, the interior of the cylinder 100 has a piston head 210 slidably mounted therein, and the end of the piston rod 200 is fixedly connected to the piston head 210.

In the above implementation process, the connection portion between the piston head 210 and the piston rod 200 is integrally formed, so that the connection strength between the piston head 210 and the piston rod 200 can be improved, and the piston head 210 can drive the piston rod 200 to move when moving in the cylinder 100.

In a specific embodiment, the cross-sectional area of the piston head 210 is larger than the bore area of the mounting bore 110, and the side wall of the piston head 210 sealingly engages the inner wall of the cylinder 100.

In the above implementation, the piston head 210 is prevented from sliding out through the mounting hole 110, which is more beneficial for the piston head 210 to move inside the cylinder 100.

In one particular embodiment, the mounting hole 110 is a counterbore and the lower end surface of the stop block 300 is in close proximity to the seal dust 140.

In the above implementation process, the outer wall of the sealing dust-proof member 140 is in sealing fit with the inner wall of the guide sleeve 120, so that the sealing effect between the guide sleeve 120 and the piston rod 200 can be improved.

In a specific embodiment, the sealing dust-proof member 140 includes a lower sealing ring 141 and an upper sealing ring 142, the lower sealing ring 141 is slidably inserted into the groove of the mounting groove 130, the upper sealing ring 142 is fixedly connected to the upper end surface of the lower sealing ring 141, and the surface of the upper sealing ring 142 is tightly sleeved with a limiting ring 143, the lower end surface of the limiting ring 143 is fixedly connected with the lower sealing ring 141, and the upper end surface of the limiting ring 143 is attached to the lower end surface of the limiting seat 300.

In the above implementation process, the limiting ring 143 may be made of a hard material, and the limiting ring 143 is used to limit the deformation amplitude of the lower sealing ring 141 and the upper sealing ring 142, which is more beneficial to the use of the lower sealing ring 141 and the upper sealing ring 142.

In a specific embodiment, one end of the piston rod 200 sequentially slides through the insides of the lower and upper sealing rings 141 and 142, and both the inner wall of the lower sealing ring 141 and the inner wall of the upper sealing ring 142 are in sealing engagement with the piston rod 200.

In the above implementation, both the lower sealing ring 141 and the upper sealing ring 142 may improve the sealability between the piston rod 200 and the guide sleeve 120.

In a specific embodiment, the lower sealing ring 141, the upper sealing ring 142 and the limiting ring 143 are coaxially arranged, and the connection part of the lower sealing ring 141 and the upper sealing ring 142 is integrally formed.

In the above implementation process, the integrated design can improve the connection strength between the lower sealing ring 141 and the upper sealing ring 142, and is more beneficial to the use of the lower sealing ring 141 and the upper sealing ring 142.

In a specific embodiment, the inner diameter of the lower seal ring 141 is the same as the inner diameter of the upper seal ring 142, and the outer diameter of the lower seal ring 141 is greater than the outer diameter of the upper seal ring 142.

In the above implementation process, the inner diameters are the same, so that the lower sealing ring 141 and the upper sealing ring 142 are beneficial to seal the piston rod 200.

In a specific embodiment, the limiting seat 300 is provided with a limiting strip 330 inside, and the limiting strips 330 are disposed in two pairs, and the clamping blocks 320 are located between the two corresponding clamping blocks 320.

In the above implementation process, the limiting bar 330 is configured to limit the moving direction of the clamping block 320, so that the clamping block 320 can move more stably in the limiting seat 300.

In a specific embodiment, the elastic member 310 is a spring, and the limiting seat 300 is a circular base with a hollowed upper end surface.

In the above implementation process, the upper end surface is hollowed out, which is favorable for installing the clamping block 320 in the limiting seat 300.

In a specific embodiment, the side wall of the limiting seat 300 is provided with a clamping protrusion 340, the end of the cylinder body 100 is provided with a slot 160, the inner wall of the end of the cylinder body 100 is provided with a sliding groove 170, the sliding groove 170 is communicated with the slot 160, and the clamping protrusion 340 is slidably inserted into the groove of the sliding groove 170 through the slot 160.

In a specific embodiment, the cylinder 100 is communicated with two hydraulic oil delivery pipes 400, the two hydraulic oil delivery pipes 400 are respectively located at two sides of the piston head 210, the two hydraulic oil delivery pipes 400 are rotatably provided with valve cores 410, the two valve cores 410 are fixedly connected through valve rods 420, the side wall of the cylinder 100 is provided with a shell 500, the interior of the shell 500 is provided with a rotating shaft 510, the rotating shaft 510 is rotatably connected with one of the valve cores 410, the rotating shaft 510 is in key connection with a first gear 520, the interior of the cylinder 100 is rotatably provided with a second gear 530, the lower end part of the limiting seat 300 is fixedly sleeved with a third gear 350, and the first gear 520 and the third gear 350 are meshed with the second gear 530 for transmission.

It can be appreciated that the connection between the second gear 530 and the cylinder 100 is provided with a damping shaft, so that the second gear 530 cannot easily rotate when the second gear 530 is not subjected to external force, which is more beneficial to the use of the second gear 530.

In the above implementation process, after the sealing dust-proof member 140 is inserted into the groove of the mounting groove 130 on the surface of the guide sleeve 120, the clamping block 320 is pulled, so that the clamping block 320 is recovered into the limit seat 300, then the limit seat 300 and the third gear 350 are inserted into the mounting hole 110, the clamping projection 340 on the side wall of the limit seat 300 is inserted into the chute 170 through the slot 160, the teeth of the third gear 350 are engaged with the teeth of the second gear 530, after the limit seat 300 is rotated, the clamping projection 340 is rotated into the chute 170, the clamping block 320 is moved to the corresponding clamping groove 150, after the clamping block 320 is released, the clamping block 320 is inserted into the clamping groove 150 under the support of the elastic member 310, the limit seat 300 drives the third gear 350 to rotate, and the first gear 520, the rotating shaft 510 and the valve core 410 are driven to rotate under the transmission of the second gear 530, so that the hydraulic oil conveying pipe 400 is opened, and the hydraulic cylinder with the dust-proof structure can be normally used;

when the sealing dustproof member 140 is dismounted, the clamping block 320 is stirred, the clamping block 320 is moved away from the groove of the clamping groove 150, then the limiting seat 300 is rotated, the clamping protrusion 340 on the side wall of the limiting seat 300 is moved to the position of the slot 160, the first gear 520, the rotating shaft 510 and the valve core 410 are driven to rotate under the matched transmission of the third gear 350 and the second gear 530, the valve core 410 can close the hydraulic oil conveying pipe 400, and when the sealing dustproof member 140 is dismounted and replaced, the hydraulic oil in the cylinder body 100 can be prevented from being discharged through the hydraulic oil conveying pipe 400, so that the possibility of influencing the subsequent use of the hydraulic cylinder with the dustproof structure due to the flow of the hydraulic oil can be reduced.

In a specific embodiment, two hydraulic oil delivery pipes 400 are arranged in parallel, and both hydraulic oil delivery pipes 400 are hard pipes.

In the implementation process, a hard pipe fitting is adopted as the hydraulic oil conveying pipe 400, so that the hydraulic oil conveying pipe 400 is more beneficial to use, and the hydraulic oil conveying pipe 400 can be connected with a hydraulic oil station through an external pipeline.

In a specific embodiment, the shaft of the valve rod 420 and the shaft of the rotating shaft 510 are both sleeved with a sealing ring 430, one side of the sealing ring 430 is fixedly connected with the corresponding hydraulic oil delivery pipe 400, and the shaft of the valve rod 420 and the shaft of the rotating shaft 510 are respectively in sealing fit with the inner wall of the corresponding sealing ring 430.

In the above-described implementation, the sealing rings 430 are provided, so that the sealability between the valve stem 420 and the rotary shaft 510 and the corresponding hydraulic oil delivery pipe 400 can be improved.

In a specific embodiment, the cross-sectional area of the third gear 350 is smaller than the hole area of the mounting hole 110, and the third gear 350 is slidably inserted into the hole of the mounting hole 110.

In the above implementation, limiting the cross-sectional area of the third gear 350 ensures that the third gear 350 is inserted into the mounting hole 110, facilitating the mounting of the third gear 350, and in addition, in the implementation, the purpose of variable speed driving may be achieved by changing the gear ratios between the first gear 520, the second gear 530 and the third gear 350, where the gear ratios between the first gear 520, the second gear 530 and the third gear 350 are determined according to practical situations.

In a specific embodiment, the top end of the limit seat 300 is provided with a cover plate 600, the surface of the cover plate 600 is provided with a bolt 610, a threaded sleeve 360 is fixed inside the limit seat 300, a threaded section of the bolt 610 penetrates through the cover plate 600 in a sliding manner, the threaded section of the bolt 610 is connected to the threaded sleeve 360 in a threaded manner, and the lower end face of the cover plate 600 is tightly attached to the upper end face of the clamping block 320.

In the above implementation process, the cover plate 600 is mounted on the surface of the limit seat 300 in a threaded connection manner through the bolt 610 and the screw sleeve 360, so that the cover plate 600 can limit the movement of the clamping block 320, and the movement of the clamping block 320 is more stable.

In a specific embodiment, the upper end surface of the clamping block 320 is provided with a sliding block 321, the top end of the sliding block 321 penetrates through the cover plate 600 in a sliding manner, the top end of the sliding block 321 is provided with a movable block 322, one side of the movable block 322 is attached to the rod body of the piston rod 200, and the rod body of the piston rod 200 is provided with an annular groove 220 corresponding to the movable block 322.

In the above implementation process, the sliding block 321 and the clamping block 320 are driven to move by pulling the movable block 322, the rod body of the piston rod 200 can limit the movement of the movable block 322, when the rod body of the piston rod 200, which is not provided with the annular groove 220, is in contact with the movable block 322, the piston rod 200 can block the movement of the movable block 322, the sliding block 321 and the clamping block 320, and when the piston rod 200 is used, the annular groove 220 on the surface of the piston rod 200 is only required to be staggered with the movable block 322, so that the clamping block 320 can be limited to move, when the piston rod 200 is used normally, the clamping block 320 can be inserted into the groove of the clamping groove 150 more stably, the limiting seat 300 can be installed in the installation hole 110 more stably, the movement of the sealing dust-proof piece 140 can be limited more stably, the installation of the sealing dust-proof piece 140 is more stable, and the possibility that the sealing dust-proof piece 140 falls off is reduced.

In a specific embodiment, the sealing dust-proof member 140 has a thickness greater than the height of the annular groove 220, and the surface of the cover plate 600 is provided with a through groove corresponding to the slider 321.

In the above implementation, sealing dust seal 140 is facilitated to seal annular groove 220.

This pneumatic cylinder with dustproof construction when using, insert sealed dust guard 140 in mounting groove 130 on uide bushing 120 surface, then stir fixture block 320, retrieve fixture block 320 to spacing seat 300 in, alright insert fixture block 320 in mounting hole 110 of cylinder body 100 tip, after unclamping fixture block 320, under the support of elastic component 310, fixture block 320 can insert in the draw-in groove 150 of cylinder body 100 inside, then spacing seat 300 alright restriction sealed dust guard 140's removal, uide bushing 120 and sealed dust guard 140 alright improve the leakproofness between cylinder body 100 and piston rod 200, when piston rod 200 moves, can avoid the dust to enter into cylinder body 100 through between uide bushing 120 and the piston rod 200, reach dustproof effect, and install fixture block 320 and spacing seat 300 with the joint mode of slip grafting, conveniently take out spacing seat 300 from mounting hole 110, alright dismantle sealed dust guard 140, make sealed dust guard 140's change more convenient.

The foregoing is merely exemplary embodiments of the present application and is not intended to limit the scope of the present application, and various modifications and variations may be suggested to one skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

Claims

1. A hydraulic cylinder with dustproof structure is characterized by comprising

The cylinder body (100), the tip of cylinder body (100) is provided with mounting hole (110), and install uide bushing (120) in the groove of mounting hole (110), mounting groove (130) have been seted up to one side of uide bushing (120), peg graft in the inslot of mounting groove (130) have sealed dust keeper (140);

the piston rod (200) is in sliding insertion connection with the inside of the sealing dustproof piece (140), and the inner wall of the sealing dustproof piece (140) is in sealing fit with the piston rod (200);

the limiting seat (300), limiting seat (300) sliding grafting is in the inslot of mounting hole (110), just the internally mounted of limiting seat (300) has elastic component (310), one side of elastic component (310) is fixed with fixture block (320), the one end of fixture block (320) sliding runs through limiting seat (300), draw-in groove (150) corresponding with fixture block (320) are seted up to the tip of cylinder body (100), just draw-in groove (150) with mounting hole (110) intercommunication, the one end of fixture block (320) sliding grafting is in the inslot of corresponding draw-in groove (150);

a piston head (210) is slidably arranged in the cylinder body (100), and the end part of the piston rod (200) is fixedly connected with the piston head (210);

the side wall of the limit seat (300) is provided with a clamping protrusion (340), the end part of the cylinder body (100) is provided with a slot (160), the inner wall of the end part of the cylinder body (100) is provided with a chute (170), the chute (170) is communicated with the slot (160), and the clamping protrusion (340) is slidably inserted into the slot of the chute (170) through the slot (160);

the cylinder body (100) is communicated with two hydraulic oil conveying pipes (400), the two hydraulic oil conveying pipes (400) are respectively located at two sides of the piston head (210), valve cores (410) are rotatably installed between the two hydraulic oil conveying pipes (400), the two valve cores (410) are fixedly connected through valve rods (420), a shell (500) is installed on the side wall of the cylinder body (100), a rotating shaft (510) is installed in the shell (500), the rotating shaft (510) is rotatably connected with one of the valve cores (410), a first gear (520) is connected with the rotating shaft (510) in a key manner, a second gear (530) is rotatably installed in the cylinder body (100), a third gear (350) is fixedly sleeved at the lower end part of the limiting seat (300), and the first gear (520) and the third gear (350) are in meshed transmission with the second gear (530);

after the sealing dustproof piece (140) is inserted into the groove of the mounting groove (130) on the surface of the guide sleeve (120), the clamping block (320) is stirred, so that the clamping block (320) is recovered into the limiting seat (300), then the limiting seat (300) and the third gear (350) are inserted into the mounting hole (110), the clamping protrusion (340) on the side wall of the limiting seat (300) is inserted into the sliding groove (170) through the slot (160), teeth of the third gear (350) are meshed with teeth of the second gear (530), after the limiting seat (300) is rotated, the clamping protrusion (340) is rotated into the sliding groove (170), the clamping block (320) is moved to the corresponding clamping groove (150), after the clamping block (320) is loosened, the clamping block (320) is inserted into the clamping groove (150) under the support of the elastic piece (310), the third gear (350) drives the rotating cylinder (510) to rotate, and the second gear (300) drives the rotating cylinder (510) to rotate;

when the sealing dustproof piece (140) is dismounted, the clamping block (320) is stirred, the clamping block (320) is moved away from the groove of the clamping groove (150), then the limiting seat (300) is rotated, the clamping protrusion (340) on the side wall of the limiting seat (300) is moved to the position of the slot (160), the first gear (520), the rotating shaft (510) and the valve core (410) are driven to rotate under the matched transmission of the third gear (350) and the second gear (530), the valve core (410) can close the hydraulic oil conveying pipe (400), and when the sealing dustproof piece (140) is dismounted and replaced, the hydraulic oil in the cylinder body (100) can be prevented from being discharged through the hydraulic oil conveying pipe (400), so that the possibility that the subsequent use of the hydraulic cylinder with the dustproof structure is influenced by the flow of the hydraulic oil can be reduced.

2. A hydraulic cylinder with dust-proof structure according to claim 1, characterized in that the cross-sectional area of the piston head (210) is larger than the hole area of the mounting hole (110), and the side wall of the piston head (210) is in sealing engagement with the inner wall of the cylinder body (100).

3. The hydraulic cylinder with the dustproof structure according to claim 1, wherein the mounting hole (110) is a counter bore, and the lower end surface of the limit seat (300) is tightly attached to the sealing dustproof member (140).

4. The hydraulic cylinder with the dustproof structure according to claim 1, wherein the sealing dustproof member (140) comprises a lower sealing ring (141) and an upper sealing ring (142), the lower sealing ring (141) is slidably inserted into the groove of the mounting groove (130), the upper sealing ring (142) is fixedly connected to the upper end surface of the lower sealing ring (141), a limiting ring (143) is fixedly sleeved on the surface fastening of the upper sealing ring (142), the lower end surface of the limiting ring (143) is fixedly connected with the lower sealing ring (141), and the upper end surface of the limiting ring (143) is attached to the lower end surface of the limiting seat (300).

5. The hydraulic cylinder with the dustproof structure according to claim 4, wherein one end of the piston rod (200) sequentially slides through the insides of the lower sealing ring (141) and the upper sealing ring (142), and the inner wall of the lower sealing ring (141) and the inner wall of the upper sealing ring (142) are in sealing fit with the piston rod (200).

6. The hydraulic cylinder with the dustproof structure according to claim 4, wherein the lower sealing ring (141), the upper sealing ring (142) and the limiting ring (143) are coaxially arranged, and the joint of the lower sealing ring (141) and the upper sealing ring (142) is integrally formed.

7. The hydraulic cylinder with the dustproof structure according to claim 4, characterized in that the inner diameter of the lower seal ring (141) and the inner diameter of the upper seal ring (142) are the same, and the outer diameter of the lower seal ring (141) is larger than the outer diameter of the upper seal ring (142).

8. The hydraulic cylinder with the dustproof structure according to claim 1, wherein a limiting strip (330) is arranged inside the limiting seat (300), the limiting strips (330) are arranged in a pair of opposite directions, and the clamping blocks (320) are located between the two corresponding clamping blocks (320).

9. The hydraulic cylinder with the dustproof structure according to claim 1, wherein the elastic piece (310) is a spring, and the limiting seat (300) is a circular base with a hollowed upper end surface.