CN212717471U

CN212717471U - Hydraulic cylinder with air-tight sealing structure

Info

Publication number: CN212717471U
Application number: CN202021309180.9U
Authority: CN
Inventors: 罗义龙; 马战平; 罗宇光
Original assignee: Qingling Motors Group Co Ltd; Chongqing Qingling Forging Co Ltd
Current assignee: Qingling Motors Group Co Ltd; Chongqing Qingling Forging Co Ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2021-03-16
Anticipated expiration: 2030-07-07

Abstract

The utility model belongs to pneumatic cylinder equipment field especially relates to a pneumatic cylinder with airtight structure. Including cylinder, piston rod, cylinder cap and air-tight seal structure, the piston rod is connected with the cylinder, the front end at the cylinder is installed to the cylinder cap, the cylinder cap is stretched out to the front end of piston rod to with the sealed cooperation of cylinder cap, the dust ring of laminating with the piston rod outer wall is installed to the front end of cylinder cap, air-tight seal structure is located the cylinder cap front end, be equipped with the air jet on the air-tight seal structure, and the air jet stretches out direction blowout air current along the piston rod. The utility model has the advantages that: through setting up the gas flow of airtight structure exhaust not only can prevent dust and dust ring contact, protect the dust ring, can also play the cooling effect, prolong the life of piston rod, dust ring.

Description

Hydraulic cylinder with air-tight sealing structure

Technical Field

The utility model belongs to pneumatic cylinder equipment field especially relates to a pneumatic cylinder with airtight structure.

Background

Under forging and pressing high temperature and stereoplasm dust environment, pneumatic cylinder end cover dust ring is very easily scalded, and stereoplasm dust can aggravate the wearing and tearing of dust ring and piston rod simultaneously, is unfavorable for the normal use of pneumatic cylinder, has increased the use maintenance cost of hydro-cylinder, has reduced the life of hydro-cylinder.

SUMMERY OF THE UTILITY MODEL

In view of the above shortcomings in the prior art, an object of the present invention is to provide a hydraulic cylinder with an airtight structure, which is used for solving the problem of easy damage of the piston rod and the dust ring in the prior art.

For realize above-mentioned purpose and other relevant mesh, the utility model provides a pneumatic cylinder with airtight structure, including cylinder, piston rod, cylinder cap and airtight structure, the piston rod is connected with the cylinder, the front end at the cylinder is installed to the cylinder cap, the cylinder cap is stretched out to the front end of piston rod to with the sealed cooperation of cylinder cap, the dust ring with the laminating of piston rod outer wall is installed to the front end of cylinder cap, airtight structure is located the cylinder cap front end, the last air jet that is equipped with of airtight structure, and the air jet stretches out direction blowout air current along the piston rod.

The utility model has the advantages that: through setting up the gas flow of airtight structure exhaust not only can prevent dust and dust ring contact, protect the dust ring, can also play the cooling effect, prolong the life of piston rod, dust ring.

Optionally, the air-tight sealing structure comprises a cylinder body, end cover plates are arranged at two ends of the cylinder body, through holes for the piston rod to stretch and move are formed in the end cover plates at the two ends, and the through holes far away from the cylinder cover are the air nozzles.

Optionally, the air injection port is a tapered hole, and the diameter of the tapered hole gradually increases from the end close to the cylinder head to the end far away from the cylinder head.

Optionally, an included angle formed by the conical surface of the air nozzle and the axial line of the piston rod is 15-25 degrees.

Optionally, the through-hole on the end cover plate of the cylinder body near one end of the cylinder cover is a tapered hole, the diameter of the tapered hole is gradually reduced from one end near the cylinder cover to one end far away from the cylinder cover, and one end, protruding out of the cylinder cover, of the dust ring extends into the tapered hole and a gap is reserved between the dust ring and the wall of the tapered hole.

Optionally, the minimum diameter of the through holes in the end covers at the two ends of the cylinder is 3-5 mm larger than the diameter of the piston rod.

Optionally, the minimum diameter of the through holes on the end covers at the two ends of the cylinder body is smaller than the inner diameter of the cylinder body.

Optionally, a support lug is arranged on the side wall of the barrel body, and a mounting hole is formed in the support lug.

Optionally, the mounting hole of the support lug is connected with the cylinder cover through a bolt.

Optionally, an air inlet is arranged on the air sealing structure, and the air inlet is connected with an air supply pipe.

The beneficial effect of adopting the above optional scheme is: simple structure, simple to operate have guaranteed the effect of jet outlet discharge compressed air, and the dust is difficult for getting into, and is dustproof effectual.

Drawings

Fig. 1 is a schematic structural diagram of a hydraulic cylinder with an airtight structure according to the present invention;

FIG. 2 is an enlarged schematic view of detail A of FIG. 1;

fig. 3 is a cross-sectional view of the air-tight structure of the hydraulic cylinder with the air-tight structure according to the present invention;

fig. 4 is a schematic structural diagram of the air-tight structure of the hydraulic cylinder with the air-tight structure according to the present invention.

Description of reference numerals

1, a cylinder barrel;

2, a cylinder cover;

3 a piston rod;

4, an air sealing structure;

41 an air inlet;

42 through holes;

43 through holes;

44, a lug;

441 installation holes;

5 dust ring.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the terms "upper", "lower", "left", "right", "middle" and "one" used herein are for clarity of description, and are not intended to limit the scope of the invention, but rather the scope of the invention.

As shown in fig. 1 to 4, the hydraulic cylinder with an airtight structure of the present invention comprises a cylinder barrel 1, a piston rod 3, a cylinder cover 2 and an airtight structure 4, wherein the piston rod 3 is connected with the cylinder barrel 1, the cylinder cover 2 is installed at the front end of the cylinder barrel 1, the front end of the piston rod 3 extends out of the cylinder cover 2 and is in sealing fit with the cylinder cover 2, a sealing ring is arranged between the inner wall of the cylinder cover 2 and the outer wall of the piston rod 3, a dust ring 5 attached to the outer wall of the piston rod 3 is installed at the front end of the cylinder cover 2, the end of the dust ring 5 protrudes out of the front end of the cylinder cover 2, the airtight structure 4 is located at the front end of the cylinder cover 2, an air jet is arranged on the airtight structure 4, and sprays airflow along the extending direction of the piston rod 3, dust falls to the piston rod from the front side of the piston rod 3, the, the air current direction is opposite with the dust direction that drops, prevents dust and 5 contact wear dust ring and piston rod of dust ring, prolongs the life of hydraulic stem.

As shown in fig. 1 to 4, in an exemplary embodiment, the airtight structure 4 includes a cylinder body, end cover plates are disposed at two ends of the cylinder body, through holes for the piston rod 3 to extend and retract are disposed on the end cover plates at two ends, and the through hole 42 far away from the cylinder head 2 is an air injection port. Wherein, the air jet is the bell mouth, and the diameter of this bell mouth is crescent to the one end of keeping away from cylinder cap 2 by the one end that is close to cylinder cap 2 to make the air current spout smoothly along the air jet, the contained angle alpha that the conical surface of air jet and 3 axial leads of piston rod formed can be 15 ~ 25, for example in this embodiment, contained angle alpha is 20, and the air current is effluvized, dustproof effect. The barrel is close to through-hole 43 on the end cover plate of 2 one ends of cylinder cap for the bell mouth, and the diameter of this bell mouth is reduced gradually to the one end of keeping away from cylinder cap 2 by the one end that is close to cylinder cap 2, this structural design has the dust ring 5 of doing benefit to dodging, the one end that 5 protrusions of dust ring cylinder cap 2 stretches into in this bell mouth, and leave the clearance between this bell mouth pore wall, avoid dust ring 5 and through-hole 43 to produce the interference, the conical surface of through-hole 43 can set up according to the demand with the contained angle beta that 3 axial leads of piston rod formed, as long as can dodge dust ring 5 can. Through-hole 42 minimum diameter d1, through-hole 43 minimum diameter d2 on the end cover at barrel both ends all are 3mm ~ 5mm more than the diameter of piston rod 3, in this embodiment, are 4mm more than the diameter of piston rod 3, adopt suitable diameter poor can avoid the diameter poor too big and let the dust fall into inside, are favorable to compressed air to discharge again, have guaranteed the result of use. Through-hole 42 minimum diameter D1, through-hole 43 minimum diameter D2 on the end cover at barrel both ends all are less than the internal diameter D of barrel, adopt this structural design to make the inside cavity that can form of barrel for gas can be accumulated in the cavity, is covered with the cavity, forms to hinder to flow and prevents that the dust from getting into, and can also play the cooling effect through the air current in the cavity.

As shown in fig. 1 to 4, in an exemplary embodiment, a support lug 44 is disposed on a side wall of the cylinder, a mounting hole 441 is disposed on the support lug 44, the mounting hole 441 of the support lug 44 may be connected to the cylinder head 2 by a bolt, and the connection operation is simple and convenient, or the support lug may be connected and fixed to an external frame, and the mounting position may be selected according to requirements. The outer diameter of the air sealing structure 4 can be selected according to the size of the cylinder cover 2, the air sealing structure 4 is simple in structure, can be made of steel, and is simple and convenient to produce and process and low in cost. Be equipped with air inlet 41 on the airtight structure 4, air inlet 41 sets up on the lateral wall of barrel, and it is convenient to admit air, and air inlet 41 is connected with the air supply pipe, through the stable input compressed air of air supply pipe to airtight structure 4.

The pneumatic cylinder with the air sealing structure can prevent high-temperature hard dust from directly contacting with the dustproof ring by arranging the air sealing structure with a simple structure, and avoids the high-temperature hard dust from damaging the surface of the dustproof ring, the sealing ring and the piston rod, thereby ensuring the normal use of the pneumatic cylinder; the piston rod and the cylinder cover can be cooled, the aging of parts such as a dust ring, a sealing ring and the piston rod is delayed, and the service life of the hydraulic cylinder is prolonged.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A hydraulic cylinder with an air sealing structure is characterized in that: including cylinder, piston rod, cylinder cap and air-tight seal structure, the piston rod is connected with the cylinder, the front end at the cylinder is installed to the cylinder cap, the cylinder cap is stretched out to the front end of piston rod to with the sealed cooperation of cylinder cap, the dust ring of laminating with the piston rod outer wall is installed to the front end of cylinder cap, air-tight seal structure is located the cylinder cap front end, be equipped with the air jet on the air-tight seal structure, and the air jet stretches out direction blowout air current along the piston rod.

2. The hydraulic cylinder with a hermetic seal structure according to claim 1, wherein: the air sealing structure comprises a cylinder body, end cover plates are arranged at two ends of the cylinder body, through holes for the piston rod to stretch and move are formed in the end cover plates at the two ends, and the through holes far away from the cylinder cover are air nozzles.

3. The hydraulic cylinder with a hermetic seal structure according to claim 2, wherein: the air jet is a tapered hole, and the diameter of the tapered hole is gradually increased from one end close to the cylinder cover to one end far away from the cylinder cover.

4. The hydraulic cylinder with a hermetic seal structure according to claim 3, wherein: the included angle formed by the conical surface of the air nozzle and the axial lead of the piston rod is 15-25 degrees.

5. The hydraulic cylinder with a hermetic seal structure according to claim 2, wherein: the through-hole on the end cover plate that the barrel is close to cylinder cap one end is the bell mouth, and the diameter of this bell mouth reduces gradually to the one end of keeping away from the cylinder cap by the one end that is close to the cylinder cap, the one end of dust ring protrusion cylinder cap stretches into in this bell mouth to and leave the clearance between this bell mouth pore wall.

6. The hydraulic cylinder with a hermetic seal structure according to claim 2, wherein: the minimum diameter of the through holes on the end covers at the two ends of the cylinder body is 3-5 mm larger than the diameter of the piston rod.

7. The hydraulic cylinder with a hermetic seal structure according to claim 2, wherein: the minimum diameter of the through holes in the end covers at the two ends of the cylinder body is smaller than the inner diameter of the cylinder body.

8. The hydraulic cylinder with a hermetic seal structure according to claim 2, wherein: the side wall of the barrel is provided with a support lug, and the support lug is provided with a mounting hole.

9. The hydraulic cylinder with a hermetic seal structure according to claim 8, wherein: the mounting hole of the support lug is connected with the cylinder cover through a bolt.

10. The hydraulic cylinder with a hermetic seal structure according to claim 1, wherein: the air sealing structure is provided with an air inlet, and the air inlet is connected with an air supply pipe.