CN220566353U - Sealing structure for hydraulic support cylinder - Google Patents

Abstract

The utility model discloses a sealing structure for a hydraulic support cylinder, and relates to the technical field of hydraulic cylinders; the cylinder comprises a cylinder body, wherein a piston rod is arranged at the top end of the cylinder body, symmetrically distributed protection covers are movably sleeved on the outer side of the cylinder body, the top ends of the protection covers are sleeved on the outer side of the piston rod, one sides of the protection covers are mutually hinged, and through grooves are formed in the other sides of the protection covers; through the cooperation between spout, slide rail, protection casing, logical groove, fixed block and the bolt, when the pneumatic cylinder during operation, through the inside injection hydraulic oil of advance oil pipe to the cylinder body, under the effect of hydraulic pressure, promote the piston and upwards remove, prevent that hydraulic oil from crossing the piston and reducing the velocity of motion of piston, promote piston rod and protection casing simultaneously and upwards remove, utilize the protection casing to protect the piston rod section of stretching out, prevent that particulate matters such as tiny dust and sand grain from getting into the inside of cylinder body, further improved the life of pneumatic cylinder.

Description

Sealing structure for hydraulic support cylinder

Technical Field

The utility model relates to the technical field of hydraulic cylinders, in particular to a sealing structure for a hydraulic support cylinder.

Background

The hydraulic cylinder is a hydraulic executive component which converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). The device has simple structure and reliable operation. When it is used to realize reciprocating motion, it can eliminate speed reducer, and has no transmission clearance and smooth motion, so that it can be widely used in hydraulic systems of various machines. The output force of the hydraulic cylinder is in direct proportion to the effective area of the piston and the pressure difference between two sides of the effective area of the piston; the hydraulic cylinder basically consists of a cylinder barrel, a cylinder cover, a piston rod, a sealing device, a buffer device and an exhaust device.

However, the end cover on the existing hydraulic cylinder adopts a dustproof ring to prevent particles such as tiny dust and sand, the particles such as tiny dust and sand can be adhered to the piston rod along with the extension and retraction of the piston rod, and the abrasion of the sealing ring is accelerated by repeated contact with the dustproof ring, so that the sealing effect is reduced, the maintenance is very inconvenient, and the inventor proposes a sealing structure for the hydraulic support cylinder for solving the problems.

Disclosure of Invention

In order to solve the sealing problem of the hydraulic cylinder; the utility model aims to provide a sealing structure for a hydraulic support cylinder.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a seal structure for hydraulic support hydro-cylinder, includes the cylinder body, the top of cylinder body is provided with the piston rod, the outside movable sleeve of cylinder body is equipped with the protection casing of symmetric distribution, the top cover of protection casing is established in the outside of piston rod, articulated each other between one side of protection casing, logical groove has all been seted up to the opposite side of protection casing, the top of protection casing is close to the equal fixedly connected with fixed block in one side of logical groove, through bolt threaded connection between the fixed block, the spout has all been seted up to the inner wall of protection casing, the outside fixedly connected with symmetric distribution's of cylinder body slide rail, spout slip joint is in the outside of slide rail.

Preferably, the inside slip joint of cylinder body has the piston, the mounting groove has been seted up at the top middle part of piston, the bottom fixedly connected with threaded rod of piston rod, the bottom activity of threaded rod runs through mounting groove and threaded connection has the nut, first ring channel has been seted up in the outside of piston, the inside cover of first ring channel has the piston seal, one side fixedly connected with of cylinder body top returns oil pipe, one side of cylinder body bottom just is located and returns oil pipe fixedly connected with oil feed pipe under, the bottom fixedly connected with first packing ring of piston, the bottom fixedly connected with second packing ring of end cover.

Preferably, the cylinder body top threaded connection has the end cover, the through-hole has been seted up at the top middle part of end cover, the top activity of piston rod runs through the through-hole, the second ring channel has been seted up in the outside of end cover, the inside cover of second ring channel is equipped with the end cover sealing washer.

Preferably, the bottom of cylinder body inner wall fixedly connected with blotter, the holding groove has been seted up on the top of blotter.

Compared with the prior art, the utility model has the beneficial effects that:

through the cooperation between spout, slide rail, protection casing, logical groove, fixed block and the bolt, when the pneumatic cylinder during operation, through the inside injection hydraulic oil of advance oil pipe to the cylinder body, under the effect of hydraulic pressure, promote the piston and upwards remove, prevent that hydraulic oil from crossing the piston and reducing the velocity of motion of piston, promote piston rod and protection casing simultaneously and upwards remove, utilize the protection casing to protect the piston rod section of stretching out, prevent that particulate matters such as tiny dust and sand grain from getting into the inside of cylinder body, further improved the life of pneumatic cylinder.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is a cross-sectional view of the present utility model.

Fig. 3 is an enlarged view of the present utility model at B in fig. 2.

Fig. 4 is an enlarged view of the utility model at a in fig. 2.

Fig. 5 is a schematic view of the internal structure of the cylinder body according to the present utility model.

Fig. 6 is a partially disassembled structure of the present utility model.

Fig. 7 is a schematic structural view of a protective cover, a through slot, a fixed block and a chute in the utility model.

In the figure: 1. a cylinder; 2. a piston rod; 3. a protective cover; 4. a through groove; 5. a fixed block; 6. a chute; 7. a slide rail; 8. a piston; 9. a mounting groove; 10. a threaded rod; 11. a nut; 12. a first annular groove; 13. a piston seal ring; 14. an end cap; 15. a through hole; 16. a second annular groove; 17. an end cover sealing ring; 18. a cushion pad; 19. a container; 20. an oil return pipe; 21. an oil inlet pipe; 22. a first gasket; 23. and a second gasket.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples: as shown in fig. 1-7, the utility model provides a sealing structure for a hydraulic support cylinder, which comprises a cylinder body 1, wherein a piston rod 2 is arranged at the top end of the cylinder body 1, symmetrically distributed protection covers 3 are movably sleeved on the outer side of the cylinder body 1, the top ends of the protection covers 3 are sleeved on the outer side of the piston rod 2, one sides of the protection covers 3 are hinged with each other, through grooves 4 are formed in the other sides of the protection covers 3, fixed blocks 5 are fixedly connected to one sides, close to the through grooves 4, of the top ends of the protection covers 3, the fixed blocks 5 are connected through bolt threads, sliding grooves 6 are formed in the inner walls of the protection covers 3, symmetrically distributed sliding rails 7 are fixedly connected to the outer side of the cylinder body 1, and the sliding grooves 6 are in sliding clamping connection with the outer sides of the sliding rails 7.

The inside slip joint of cylinder body 1 has piston 8, and mounting groove 9 has been seted up at piston 8's top middle part, and the bottom fixedly connected with threaded rod 10 of piston rod 2, threaded rod 10's bottom activity run through mounting groove 9 and threaded connection have nut 11.

Through adopting above-mentioned technical scheme, through with threaded rod 10 activity run through piston 8 to make the inside of mounting groove 9 be placed to the bottom of piston rod 2, install piston 8 and piston rod 2 through screwing up nut 11.

The top end of the cylinder body 1 is connected with an end cover 14 in a threaded manner, a through hole 15 is formed in the middle of the top end of the end cover 14, and the top end of the piston rod 2 movably penetrates through the through hole 15.

By adopting the technical scheme, the end cover 14 is in threaded connection with the top end of the cylinder body 1, the top end of the piston rod 2 movably penetrates through the through hole 15, and the cylinder body 1 is sealed by the end cover 14.

The outside of piston 8 has seted up first ring channel 12, and the inside cover of first ring channel 12 is equipped with piston seal 13.

By adopting the technical scheme, the piston sealing ring 13 is sleeved in the first annular groove 12, so that hydraulic oil is prevented from crossing the piston.

A second annular groove 16 is formed in the outer side of the end cover 14, and an end cover sealing ring 17 is sleeved in the second annular groove 16.

Through adopting above-mentioned technical scheme, through the cover in the inside cover of second ring channel 16 establish end cover sealing washer 17, be convenient for seal cylinder body 1, prevent that hydraulic oil from leaking through the clearance between cylinder body 1 and the end cover 14.

The bottom of the inner wall of the cylinder body 1 is fixedly connected with a cushion pad 18, and the top end of the cushion pad 18 is provided with a containing groove 19.

Through adopting above-mentioned technical scheme, through setting up blotter 18, when piston rod 2 shrink to contact with blotter 18, cushion piston rod 2, simultaneously through seting up holding groove 19, the threaded rod 10 of being convenient for stretches into.

An oil return pipe 20 is fixedly connected to one side of the top end of the cylinder body 1, and an oil inlet pipe 21 is fixedly connected to one side of the bottom end of the cylinder body 1 and located right below the oil return pipe 20.

By adopting the above technical scheme, through setting up oil return pipe 20 and oil feed pipe 21, be convenient for pour into hydraulic oil into the inside of cylinder body 1.

The bottom end of the piston 8 is fixedly connected with a first gasket 22, and the bottom end of the end cover 14 is fixedly connected with a second gasket 23.

By adopting the technical scheme, through setting up first packing ring 22 and second packing ring 23, when piston 8 contacted with first packing ring 22 and second packing ring 23 respectively, can both form the clearance between piston 8 and end cover 14 and the piston 8 to the hydraulic oil's entering of being convenient for.

Working principle: during the use, correspond the position of spout 6 and slide rail 7, then establish the outside at cylinder body 1 with two protection casing 3 cover, and make the top cover of protection casing 3 establish in the outside of piston rod 2, return oil pipe 20 and oil feed pipe 21 are located the inside of logical groove 4 this moment, fix two fixed blocks 5 through the bolt, thereby slide joint and piston rod 2 fixed connection with protection casing 3 and cylinder body 1, during the pneumatic cylinder work, pour into hydraulic oil into the inside of cylinder body 1 through oil feed pipe 21, under the hydraulic pressure effect, promote piston 8 upwards to remove, prevent that hydraulic oil from crossing the piston and reduce the velocity of movement of piston, promote piston rod 2 and protection casing 3 upwards simultaneously, utilize protection casing 3 to protect the section that stretches out of piston rod 2, prevent particulate matters such as tiny dust and sand grain get into the inside of cylinder body 1.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (8)

1. The utility model provides a seal structure for hydraulic support hydro-cylinder, includes cylinder body (1), its characterized in that: the top of cylinder body (1) is provided with piston rod (2), the outside movable sleeve of cylinder body (1) is equipped with protection casing (3) of symmetric distribution, the outside at piston rod (2) is established to the top cover of protection casing (3), articulated each other between one side of protection casing (3), logical groove (4) have all been seted up to the opposite side of protection casing (3), the top of protection casing (3) is close to one side of logical groove (4) and is equal fixedly connected with fixed block (5), through bolt threaded connection between fixed block (5), spout (6) have all been seted up to the inner wall of protection casing (3), the outside fixedly connected with symmetric distribution's of cylinder body (1) slide rail (7), spout (6) slip joint is in the outside of slide rail (7).

2. The sealing structure for the hydraulic support cylinder according to claim 1, wherein a piston (8) is slidably clamped in the cylinder body (1), a mounting groove (9) is formed in the middle of the top end of the piston (8), a threaded rod (10) is fixedly connected to the bottom end of the piston rod (2), and the bottom end of the threaded rod (10) movably penetrates through the mounting groove (9) and is in threaded connection with a nut (11).

3. The sealing structure for the hydraulic support cylinder according to claim 2, wherein the top end of the cylinder body (1) is in threaded connection with an end cover (14), a through hole (15) is formed in the middle of the top end of the end cover (14), and the top end of the piston rod (2) movably penetrates through the through hole (15).

4. A sealing structure for a hydraulic support cylinder according to claim 2, characterized in that the outer side of the piston (8) is provided with a first annular groove (12), and the interior of the first annular groove (12) is sleeved with a piston sealing ring (13).

5. A sealing structure for a hydraulic support cylinder as claimed in claim 3, characterized in that the outer side of the end cap (14) is provided with a second annular groove (16), and the interior of the second annular groove (16) is sleeved with an end cap sealing ring (17).

6. The sealing structure for the hydraulic support cylinder according to claim 1, wherein a buffer pad (18) is fixedly connected to the bottom of the inner wall of the cylinder body (1), and a containing groove (19) is formed in the top end of the buffer pad (18).

7. The sealing structure for the hydraulic support cylinder according to claim 1, wherein an oil return pipe (20) is fixedly connected to one side of the top end of the cylinder body (1), and an oil inlet pipe (21) is fixedly connected to one side of the bottom end of the cylinder body (1) and located right below the oil return pipe (20).

8. A sealing structure for a hydraulic support cylinder according to claim 3, wherein the bottom end of the piston (8) is fixedly connected with a first gasket (22), and the bottom end of the end cap (14) is fixedly connected with a second gasket (23).