CN213206534U - Sealing structure for piston rod - Google Patents

Abstract

The utility model discloses a seal structure for piston rod, including piston rod, the connector assembly pole, piston plug, piston one-level sealing washer, piston second grade sealing washer, the piston head import, the gland, first dust ring, the second dust ring, piston rod one end sets up the connector assembly pole, the connector assembly pole bottom sets up the piston plug, the piston rod bottom sets up piston one-level sealing washer, piston one-level sealing washer bottom sets up piston second grade sealing washer, the piston plug surface sets up the piston head, the piston head top sets up the piston head import, the piston rod top sets up the gland, inside the setting of gland is first dust ring. First dust ring bottom sets up the second dust ring, the utility model discloses, the overhead vacuum layer that sets up of piston can make piston rod bottom realize vacuum seal, through the gland that sets up on the piston rod top, can be abundant seal the piston rod top, can avoid being infected with the dust on the piston rod through the dust ring.

Description

Sealing structure for piston rod

Technical Field

The utility model belongs to the hydraulic equipment field especially relates to a seal structure for piston rod.

Background

The hydraulic cylinder realizes the linear motion of the transmission mechanism by increasing or decreasing the hydraulic pressure, so the hydraulic cylinder is also called as a linear actuator, and particularly the hydraulic cylinder is widely applied to a plurality of fields such as industrial machinery or load transportation. One or more piston rods are generally arranged in the hydraulic cylinder, and the guide sleeve on each hydraulic cylinder is connected with the piston rod, but in the existing connecting method, due to the problem of the sealing effect of the connecting part, dust adsorption, air leakage and other conditions are easy to occur, the connecting part is generally subjected to dust prevention through a single dust ring, the dust prevention is poor, and fine dust can enter the hydraulic cylinder along with the gap between the piston rod and the guide sleeve; when a general hydraulic cylinder is used, the surface of a piston rod may lack lubrication, and the abrasion between the piston rod and an oil seal may be large, so that a sealing structure for the piston rod is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a seal structure for piston rod aims at solving the above-mentioned dustproof effect difference that exists, and the gas leakage problem easily appears in the jar.

The utility model discloses a realize like this, a seal structure for piston rod, including the piston rod, piston rod bottom fixed mounting the connector assembly pole, connector assembly pole bottom fixed mounting the piston plug, piston plug surface fixed mounting the piston head, piston rod bottom surface fixed mounting the piston rod one-level sealing washer, it has to open in the middle of the piston rod one-level sealing washer top the piston head import, piston rod top surface fixed mounting the gland, the inside fixed mounting of gland the second dust ring, gland bottom fixed mounting the gland base, gland base bottom fixed mounting the shaft hole sealing washer, shaft hole sealing washer bottom fixed mounting the stand pipe.

Preferably, the piston head inlet is formed in the middle of the top of the piston head, the bottom end of the piston head inlet is fixedly connected with the connecting rod socket, and the bottom end of the connecting rod socket is fixedly connected with the plug socket.

Preferably, the piston head top is fixedly and fixedly installed with the piston rod primary sealing ring, the bottom end of the piston rod primary sealing ring is fixedly installed with the piston rod secondary sealing ring, the bottom end of the piston rod secondary sealing ring is fixedly installed with the piston head top sealing layer, the bottom end of the piston head top sealing layer is fixedly installed with the piston head top vacuum layer, the bottom end of the piston head top vacuum layer is fixedly installed with the piston head bottom sealing layer, and the bottom end of the piston head bottom sealing layer is fixedly installed with the piston head bottom vacuum layer.

Preferably, the outer surface of the top end of the piston rod is fixedly installed on the second dust ring, the outer surface of the second dust ring is fixedly installed on the gland, the bottom end of the gland is fixedly installed on the gland base, the gland base is fixedly installed in the first dust ring, and the piston rod is fixedly installed in the first dust ring.

Preferably, the top of the piston rod is provided with the shaft hole, the outer surface of the shaft hole is fixedly provided with the shaft hole sealing ring, and the shaft hole sealing ring is far away from one end of the shaft hole and fixedly provided with the shaft hole sealing head.

Preferably, the oil seals are fixedly installed on two sides inside the guide pipe, the rubber ring is fixedly installed in the middle inside the guide pipe, the pipe cover is fixedly installed in the middle of the outer surface of the guide pipe, and the pipe cover is fixedly connected with the rubber ring through an oil pipe.

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

the utility model discloses, can be in the same place piston rod and piston head installation through the piston head import, can fully seal bottom end of the piston rod through piston rod one-level sealing washer and piston rod second grade sealing washer, can fully carry out fully sealed bottom end of the piston rod through sealing layer at the bottom of piston head top sealing layer and the piston head, can dispel the air in the piston head through vacuum layer at the bottom of piston head top and the piston head, reduce the frictional force of piston head, can fully avoid the dust to get into the pneumatic cylinder through first dust ring and second dust ring, can fully seal the connecting axle through shaft hole sealing washer and shaft hole sealing head, avoid appearing the condition emergence such as gas leakage oil leak, can avoid the condition emergence of oil leakage through the oil blanket, can avoid inside fluid to spill through the tube cap.

Drawings

Fig. 1 is a schematic structural view of a bottom end elevation view of a housing of a sealing structure for a piston rod according to the present invention;

fig. 2 is a schematic structural view of a piston head in a sealing structure of a piston rod of the present invention in fig. 1;

fig. 3 is a schematic structural diagram of a top end elevation view of a housing of a sealing structure for a piston rod of the present invention.

In the figure: 1. a piston rod; 2. a plug connecting rod; 3. a piston plug; 4. a primary sealing ring of the piston rod; 5. a piston rod secondary sealing ring; 6. a piston crown seal layer; 7. a piston head top vacuum layer; 8. a piston head bottom sealing layer; 9. a piston head bottom vacuum layer; 10. a piston head; 11. a piston head inlet; 12. a connecting rod socket; 13. a plug and a socket; 14. a gland; 15. a gland base; 16. a second dust ring; 17. a first dust ring; 18. a shaft hole sealing head; 19. a shaft hole sealing ring; 20. a shaft hole; 21. a guide tube; 22. oil sealing; 23. a rubber ring; 24. and (7) covering the tube.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1-3, a sealing structure for a piston rod includes a piston rod 1, the piston rod 1 is fixedly mounted at the bottom end of the plug connecting rod 2, the plug connecting rod 2 is fixedly mounted at the bottom end of the piston plug 3, the piston head 10 is fixedly mounted on the outer surface of the piston plug 3, the piston rod 1 is fixedly mounted at the outer surface of the bottom of the piston rod 4, the piston head inlet 11 is arranged in the middle of the top end of the piston rod 4, the gland 14 is fixedly mounted at the outer surface of the top end of the piston rod 1, the second dust ring 16 is fixedly mounted in the gland 14, the gland base 15 is fixedly mounted at the bottom of the gland 14, the shaft hole sealing ring 19 is fixedly mounted at the bottom of the gland base 15, and the guide tube 21 is fixedly mounted at the.

The utility model discloses in, open in the middle of the piston head 10 top has piston head import 11, 11 bottom fixed connections of piston head import connecting rod socket 12, 12 bottom fixed connections of connecting rod socket 13 can be in the same place piston rod 1 and piston head 10 installation through piston head import 11.

In the utility model, the piston head 10 is fixedly installed on the top of the piston rod primary seal ring 4, the piston rod secondary seal ring 5 is fixedly installed at the bottom end of the piston head top seal layer 6, the piston head top vacuum layer 7 is fixedly installed at the bottom end of the piston head top vacuum layer 7, the piston head bottom seal layer 8 is fixedly installed at the bottom end of the piston head bottom seal layer 8, the piston head bottom vacuum layer 9 can fully seal the bottom end of the piston rod 1 through the piston rod primary seal ring 4 and the piston rod secondary seal ring 5, the bottom end of the piston rod 1 can be fully sealed through the piston head top seal layer 6 and the piston head bottom seal layer 8, and air in the piston head 10 can be removed through the piston head top vacuum layer 7 and the piston head bottom vacuum layer 9, reducing the friction of the piston head 10.

The utility model discloses in, the outer fixed surface installation in 1 top of piston rod the second dust ring 16, the 16 outer fixed surface installations of second dust ring gland 14, 14 bottom fixed mounting of gland 15, the inside fixed mounting of gland base 15 first dust ring 17, the inside fixed mounting of first dust ring 17 the piston rod 1 can fully avoid the dust to get into the pneumatic cylinder through first dust ring 17 and second dust ring 16.

The utility model discloses in, 1 top of piston rod is opened there is shaft hole 20, 20 fixed surface installations in shaft hole 19, shaft hole sealing washer 19 is kept away from the one end fixed mounting in shaft hole 20 shaft hole sealing head 18 can fully seal the connecting axle through shaft hole sealing washer 19 and shaft hole sealing head 18, avoids appearing the condition emergence such as gas leakage oil leak.

The utility model discloses in, the inside both sides fixed mounting of stand pipe 21 oil blanket 22, fixed mounting in the middle of the stand pipe 21 is inside rubber circle 23, fixed mounting in the middle of the 21 surface of stand pipe 24, pipe cap 24 passes through oil pipe fixed connection rubber circle 23, the condition that can avoid the oil impregnate through oil blanket 22 takes place, can avoid inside fluid to spill through pipe cap 24.

The utility model discloses a theory of operation is:

firstly, a piston plug 3 is inserted into a piston head inlet 11 to a plug socket 13, a plug connecting rod 2 enters a connecting rod socket 12, the bottom end of a piston rod 1 enters the piston head inlet 11, then a guide pipe 21 is installed at the top of the piston rod 1, an oil seal 22 and a rubber ring 23 are installed in advance in the guide pipe 21, then a pipe cover 24 is connected to the surface of the rubber ring 23 through an inserted oil pipe, then a shaft hole sealing ring 19 is installed on the outer surface of a shaft hole 20, a shaft hole sealing head 18 is installed outside the shaft hole sealing ring 19, then a first dust ring 17 and a second dust ring 16 are installed at the top end of the piston rod 1, then a gland base 15 is installed on the first dust ring 17, a gland 14 is also installed on the second dust ring 16, then a connecting shaft is inserted into the shaft hole 20, then the piston rod 1 is installed in a hydraulic cylinder, and air in a piston head top vacuum layer 7 and a piston head bottom vacuum layer 9 are utilized to exhaust, meanwhile, the bottom of the piston rod 1 is fully sealed by utilizing the piston rod primary sealing ring 4 and the piston rod secondary sealing ring 5.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (6)

1. The utility model provides a seal structure for piston rod, includes piston rod (1), its characterized in that: piston rod (1) bottom fixed mounting plug connector rod (2), plug connector rod (2) bottom fixed mounting piston plug (3), piston plug (3) surface fixed mounting piston head (10), piston rod (1) bottom surface fixed mounting piston rod one-level sealing washer (4), it has piston head import (11) to open in the middle of piston rod one-level sealing washer (4) top, piston rod (1) top surface fixed mounting gland (14), gland (14) inside fixed mounting second dust ring (16), gland (14) bottom fixed mounting gland base (15), gland base (15) bottom fixed mounting shaft hole sealing washer (19), shaft hole sealing washer (19) bottom fixed mounting stand pipe (21).

2. A seal structure for a piston rod according to claim 1, wherein: the piston head is characterized in that a piston head inlet (11) is formed in the middle of the top of the piston head (10), the bottom end of the piston head inlet (11) is fixedly connected with a connecting rod socket (12), and the bottom end of the connecting rod socket (12) is fixedly connected with a plug socket (13).

3. A seal structure for a piston rod according to claim 1, wherein: piston head (10) top solid fixed mounting piston rod one-level sealing washer (4), piston rod one-level sealing washer (4) bottom fixed mounting piston rod second grade sealing washer (5), piston rod second grade sealing washer (5) bottom fixed mounting piston head top sealing layer (6), piston head top sealing layer (6) bottom fixed mounting piston head top vacuum layer (7), piston head top vacuum layer (7) bottom fixed mounting piston head bottom sealing layer (8), piston head bottom sealing layer (8) bottom fixed mounting piston head bottom vacuum layer (9).

4. A seal structure for a piston rod according to claim 1, wherein: piston rod (1) top surface fixed mounting second dust ring (16), second dust ring (16) surface fixed mounting gland (14), gland (14) bottom fixed mounting gland base (15), first dust ring (17) of the inside fixed mounting of gland base (15), first dust ring (17) inside fixed mounting piston rod (1).

5. A seal structure for a piston rod according to claim 1, wherein: the piston rod (1) top is opened has shaft hole (20), shaft hole (20) surface fixed mounting shaft hole sealing washer (19), shaft hole sealing washer (19) keep away from one end fixed mounting shaft hole sealing head (18) in shaft hole (20).

6. A seal structure for a piston rod according to claim 1, wherein: the oil seal is fixedly installed on two sides inside the guide pipe (21), the rubber ring (23) is fixedly installed in the middle of the inside of the guide pipe (21), the pipe cover (24) is fixedly installed in the middle of the outer surface of the guide pipe (21), and the pipe cover (24) is fixedly connected with the rubber ring (23) through the oil pipe.

Images