CN211449261U

CN211449261U - Hydraulic oil cylinder

Info

Publication number: CN211449261U
Application number: CN201922300422.1U
Authority: CN
Inventors: 万小强; 林张荣; 费成亮
Original assignee: Jiangsu Lixueda Hydraulic Co ltd
Current assignee: Jiangsu Lixueda Hydraulic Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-09-08
Anticipated expiration: 2029-12-19

Abstract

The utility model relates to a hydraulic equipment, in particular to hydraulic cylinder. A hydraulic cylinder comprises a gland, a cylinder body and a piston rod, wherein a group of lip-shaped sealing rings with lips opposite to each other are arranged on the gland; the side wall of the oil cylinder body is provided with a first oil port, and the bottom of the oil cylinder body is provided with a second oil port; the top end of the piston rod is further fixed with a top cover, the outer side of the gland is further fixed with a middle cover, and the middle cover is further provided with a rotation prevention portion and a dust prevention portion which are parallel to the axis of the oil cylinder body on one side of the oil cylinder body. The utility model discloses the portion of preventing changeing has prevented that the piston rod from having guaranteed the safety of part for the relative rotation of hydro-cylinder body, has prevented equipment trouble. The piston rod is completely isolated from the external environment by the dustproof portion, so that dust is prevented from entering the hydraulic cylinder, the dustproof effect is excellent, and the service life of the hydraulic cylinder is prolonged. The dust cover can be detached, is convenient to replace and is easy to clean.

Description

Hydraulic oil cylinder

Technical Field

The utility model relates to a hydraulic equipment, in particular to hydraulic cylinder.

Background

The hydraulic oil cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and makes linear reciprocating motion (or swinging motion). It has simple structure and reliable operation. When it is used to implement reciprocating motion, it can omit speed-reducing device, and has no transmission gap, and its motion is stable, so that it can be extensively used in various mechanical hydraulic systems. The output force of the hydraulic oil cylinder is in direct proportion to the effective area of the piston and the pressure difference between the two sides of the piston; the hydraulic oil cylinder basically comprises a cylinder barrel, a cylinder cover, a piston rod, a sealing device, a buffering device and an exhaust device. However, since the cylinder barrel and the piston rod of the oil cylinder are both circular, the piston rod may rotate relative to the cylinder body during the movement, and the rotation may damage some parts on the oil cylinder, causing equipment failure. The hydraulic oil cylinder plays a dustproof role by a sealing ring. The sealing ring is tightly combined with the piston rod through self elasticity, and when the piston rod reciprocates, the sealing ring can scrape off dust, water stains and the like attached to the surface of the piston rod, so that dirt such as dust is blocked outside. However, under the conditions of severe external environment and more dust and impurities, when the piston rod is used for a long time, the oil seal and the sealing ring can be damaged by fine dust particles, so that the piston rod is worn, and the piston rod is damaged more seriously.

Disclosure of Invention

The utility model aims at overcoming the defect that prior art exists, providing one kind and preventing the piston rod from rotating, and keep apart the piston rod with external environment is complete, prevented the entering of dust, dustproof splendid hydraulic cylinder of effect.

Realize the utility model discloses the technical scheme of purpose is:

a hydraulic cylinder comprises a gland, a cylinder body and a piston rod, wherein a group of lip-shaped sealing rings with lips opposite to each other are arranged on the gland; the side wall of the oil cylinder body is provided with a first oil port, and the bottom of the oil cylinder body is provided with a second oil port; the top end of the piston rod is further fixed with a top cover, the outer side of the gland is further fixed with a middle cover, and the middle cover is further provided with an anti-rotation part parallel to the axis of the oil cylinder body on one side of the oil cylinder body. The anti-rotation part comprises an anti-rotation rod, a bottom sliding block, an anti-rotation rod outer cover and an anti-rotation rod dustproof cover; prevent that bull stick one end fixed connection is in on the top cap to pass the via hole of well lid, prevent that bull stick dustcoat suit welds well lid is close to hydro-cylinder body one side, the bottom slider is fixed prevent the bull stick bottom, prevent that bull stick shield detachably installs prevent the bull stick bottom.

Preferably, a dustproof part is arranged outside the exposed part of the piston rod; the dustproof part comprises a corrugated pipe, an air passage, a dustproof cover, a corrugated air pipe and an air pipe outer cover; the bellows both ends respectively with top cap and well lid seal fixed connection, well lid is equipped with a plurality of connections the bellows inside with the tracheal air flue of ripple, the trachea other end is sealed, ripple trachea overcoat is equipped with the trachea dustcoat, trachea dustcoat one end with well lid fixed connection, other end class are installed and are dismantled the shield.

Preferably, one side of the gland, which is in contact with the middle cover, is also provided with a ring of O-shaped sealing ring.

Preferably, the top cover and the middle cover are respectively fixed on the corresponding parts through bolts.

After the technical scheme is adopted, the utility model discloses following positive effect has:

(1) the utility model discloses the portion of preventing changeing has prevented that the piston rod from having guaranteed the safety of part for the relative rotation of hydro-cylinder body, has prevented equipment trouble.

(2) The utility model discloses the dust guard is with piston rod and external environment complete isolation, has prevented the entering of dust, and dustproof effect is splendid, has prolonged hydraulic cylinder's life.

(3) The utility model discloses the shield can be dismantled, and convenient the change is easily cleared up.

(4) The utility model discloses a bellows can also play certain guard action to the piston rod, also has certain anti-rotation function, can also play the effect of buffering, prevents the direct rigid contact of top cap and well lid.

(5) The utility model discloses simple structure, the assembly is easy.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which

FIG. 1 is a cross-sectional view of the present invention;

the reference numbers in the drawings are as follows:

1-pressing a cover; 2-the oil cylinder body; 3-a piston rod; 4-lip-shaped sealing ring; 5-a dust-proof part; 501-a corrugated pipe; 502-airway; 503-dust cover; 5604 bellows trachea; 505-an endotracheal cover; 6-O type sealing ring; 7-a first oil port; 8-a second oil port; 9-rotation prevention part; 901-anti-rotation rod; 902-bottom slider; 903-an anti-rotation rod outer cover; 904-anti-rotation rod dust cap.

Detailed Description

(example 1)

As shown in fig. 1, the utility model comprises a gland 1, an oil cylinder body 2 and a piston rod 3, wherein a group of lip-shaped sealing rings 4 with opposite lips are arranged on the gland 1, the piston rod 3 is arranged on the oil cylinder body 2, and the gland 1 is fixedly connected with the oil cylinder body 2 in a sealing way; a first oil port 7 is formed in the side wall of the oil cylinder body 2, and a second oil port 8 is formed in the bottom of the oil cylinder body; the top end of the piston rod 3 is further fixed with a top cover 10, the outer side of the gland 1 is further fixed with a middle cover 11, and the top cover 10 and the middle cover 11 are respectively fixed on corresponding parts through bolts. The middle cover 11 is also provided with an anti-rotation part 9 parallel to the axis of the oil cylinder body 2 at one side of the oil cylinder body 2. The rotation preventing part 9 comprises a rotation preventing rod 901, a bottom sliding block 902, a rotation preventing rod outer cover 903 and a rotation preventing rod dust cover 904; one end of the anti-rotation rod 901 is fixedly connected to the top cover 10 and penetrates through a through hole of the middle cover 11, the anti-rotation rod outer cover 903 is welded to one side, close to the oil cylinder body 2, of the middle cover 11 in a sleeved mode, the bottom sliding block 902 is fixed to the bottom of the anti-rotation rod 901, and the anti-rotation rod dust cover 904 is installed at the bottom of the anti-rotation rod 901. A dust-proof part 5 is arranged outside the exposed part of the piston rod 3; the dust-proof part 5 comprises a corrugated pipe 501, an air passage 502, a dust-proof cover 503, a corrugated air pipe 504 and an air pipe outer cover 505; bellows 501 both ends respectively with top cap 10 and well lid 11 sealed fixed connection, well lid 11 is equipped with a plurality of connections bellows 501 inside with the air flue 502 of bellows 504, the bellows 504 other end is sealed, the bellows overcoat is equipped with trachea dustcoat 505, trachea dustcoat one end with well lid 11 fixed connection, the other end is installed shield 503. And one surface of the gland 1, which is contacted with the middle cover 11, is also provided with a circle of O-shaped sealing ring 6.

The utility model discloses a theory of operation does:

when the hydraulic oil cylinder works, the top cover 10 on the piston rod 3 drives the corrugated pipe 501 and the anti-rotation rod 901 to move, the anti-rotation rod 901 penetrates through a via hole of the middle cover 11, the bottom of the anti-rotation rod 901 is provided with a bottom sliding block 902 which slides in the anti-rotation rod outer cover 903, the effect of preventing the piston rod 3 from rotating relative to the oil cylinder body 2 is achieved, and the bottom of the anti-rotation rod outer cover 903 is further provided with a detachable anti-rotation rod dustproof cover 904. The corrugated pipe 501 is communicated with 3 corrugated gas pipes 504 arranged on the corrugated pipe 501 through 3 uniformly distributed gas passages 502, and a proper amount of gas is filled into the corrugated pipe to form a completely sealed space which is completely isolated from the external environment, so that the cleanness of a piston rod is ensured, and the service life of the hydraulic oil cylinder is prolonged.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A hydraulic oil cylinder comprises a gland (1), an oil cylinder body (2) and a piston rod (3), wherein a group of lip-shaped sealing rings (4) with opposite lips are arranged on the gland (1), the piston rod (3) is arranged on the oil cylinder body (2), and the gland (1) is fixedly connected with the oil cylinder body (2) in a sealing manner; a first oil port (7) is formed in the side wall of the oil cylinder body (2), and a second oil port (8) is formed in the bottom of the oil cylinder body; the method is characterized in that: the piston rod (3) top still is fixed with top cap (10), gland (1) outside still is fixed with well lid (11), well lid (11) still install the portion of preventing changeing (9) parallel with hydro-cylinder body (2) axis in hydro-cylinder body (2) one side.

2. A hydraulic ram according to claim 1 wherein: the anti-rotation part (9) comprises an anti-rotation rod (901), a bottom sliding block (902), an anti-rotation rod outer cover (903) and an anti-rotation rod dustproof cover (904); one end of the anti-rotation rod (901) is fixedly connected to the top cover (10) and penetrates through a through hole of the middle cover (11), an anti-rotation rod outer cover (903) is welded to one side, close to the oil cylinder body (2), of the middle cover (11) in a sleeved mode, the bottom sliding block (902) is fixed to the bottom of the anti-rotation rod (901), and the anti-rotation rod dustproof cover (904) is detachably mounted to the bottom of the anti-rotation rod (901).

3. A hydraulic ram according to claim 1 wherein: a dustproof part (5) is arranged outside the exposed part of the piston rod (3); the dustproof part (5) comprises a corrugated pipe (501), an air passage (502), a dustproof cover (503), a corrugated air pipe (504) and an air pipe outer cover (505); bellows (501) both ends respectively with top cap (10) and well lid (11) sealed fixed connection, well lid (11) are equipped with a plurality of connections bellows (501) inside with air flue (502) of bellows trachea (504), bellows trachea (504) other end is sealed, the bellows overcoat is equipped with trachea dustcoat (505), trachea dustcoat one end with well lid (11) fixed connection, detachable is installed to the other end shield (503).

4. A hydraulic ram according to any one of claims 1 to 3, wherein: and one surface of the gland (1) contacted with the middle cover (11) is also provided with a circle of O-shaped sealing ring (6).

5. A hydraulic ram according to claim 1 wherein: the top cover (10) and the middle cover (11) are respectively fixed on corresponding parts through bolts.