CN111197608A

CN111197608A - Sealed hydraulic oil cylinder

Info

Publication number: CN111197608A
Application number: CN202010100588.3A
Authority: CN
Inventors: 王传忠
Original assignee: Chuzhou Yishen Machinery Manufacturing Co Ltd
Current assignee: Chuzhou Yishen Machinery Manufacturing Co Ltd
Priority date: 2020-02-19
Filing date: 2020-02-19
Publication date: 2020-05-26

Abstract

The invention provides a sealed hydraulic oil cylinder, which relates to the technical field of hydraulic oil cylinders and comprises a cylinder barrel and a piston, wherein the upper end of the piston is connected with a piston rod, the cylinder barrel comprises an upper cylinder barrel and a lower cylinder barrel, the lower end of the upper cylinder barrel is provided with an external threaded barrel, the upper end of the lower cylinder barrel is provided with a fixed groove, the bottom of the fixed groove is provided with a sealing gasket, the side wall of the upper cylinder barrel is provided with a first threaded hole, the side wall of the external threaded barrel is provided with a second threaded hole, fixing bolts are movably arranged in the first threaded hole and the second threaded hole, and a dustproof sealing assembly is arranged at the contact position. According to the invention, the cylinder barrel is designed into the upper cylinder barrel and the lower cylinder barrel which can be separated, so that the interior of the cylinder barrel of the hydraulic cylinder after long-term working can be conveniently cleaned, and the dustproof sealing assembly effectively prevents tiny particles from entering the interior of the cylinder barrel.

Description

Sealed hydraulic oil cylinder

Technical Field

The invention relates to the technical field of hydraulic oil cylinders, in particular to a sealed hydraulic oil cylinder.

Background

The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs 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 hydraulic cylinder is an actuating element in a hydraulic transmission system and is an energy conversion device for converting hydraulic energy into mechanical energy. The hydraulic motor performs a continuous rotary motion, while the hydraulic cylinder performs a reciprocating motion. The hydraulic cylinder has three types, namely a piston cylinder, a plunger cylinder and a swing cylinder, wherein the piston cylinder and the plunger cylinder realize reciprocating linear motion and output speed and thrust, and the swing cylinder realizes reciprocating swing and outputs angular speed and torque. The hydraulic cylinder may be used in combination of two or more or in combination with other mechanisms, in addition to being used singly. To accomplish a particular function.

In long-term use, some tiny particles can damage the sealing effect of the dust ring, enter the protective cover and are attached to the piston rod, so that the piston rod can be galling, excessively worn, deformed and leaked oil under the condition of severe external environment; the positioning and guiding performance of the piston rod is reduced.

Disclosure of Invention

The invention aims to provide a sealed hydraulic oil cylinder to solve the technical problem.

In order to solve the technical problems, the invention adopts the following technical scheme: a sealed hydraulic cylinder comprises a cylinder barrel and a piston, wherein the piston is movably arranged in the cylinder barrel, a piston rod is fixedly connected to the central position of the upper end of the piston, the upper end of the piston rod penetrates through the outer side of the upper end of the cylinder barrel, an oil injection hole is formed in one side of the lower end of the cylinder barrel, the cylinder barrel comprises an upper cylinder barrel and a lower cylinder barrel, an external threaded barrel is arranged at the lower end of the upper cylinder barrel along the circle of a central axis, a fixing groove is formed in the upper end of the lower cylinder barrel along the circle of the central axis, a sealing gasket is arranged at the bottom of the fixing groove, threads matched with the external threaded barrel are arranged on the inner side wall of the fixing groove, a first threaded hole is formed in the side wall of the upper cylinder barrel, a second threaded hole is formed in the side wall of the external threaded barrel, the first threaded hole is aligned with the second threaded, and a dustproof sealing assembly is arranged at the contact position of the upper end of the upper cylinder barrel and the piston rod. But through designing into the last cylinder and the lower cylinder of split with the cylinder, be convenient for clear up the cylinder inside of the pneumatic cylinder after long-term work, prevent to have the small granule wearing and tearing that the seepage entered, through the setting of external screw thread section of thick bamboo and fixed recess, first screw hole, second screw hole and fixing bolt are gone up in the cooperation for go up the cylinder and connect firmly with lower cylinder.

Preferably, the depth of the fixing groove is equal to the height of the external threaded cylinder, and the thickness of the sealing gasket is 0.1-0.2 cm.

Preferably, the upper cylinder and the lower cylinder have the same height.

Preferably, the dustproof sealing assembly comprises a fixed ring, the fixed ring is fixedly mounted at the upper end of the cylinder barrel through screws, the inner side wall of the fixed ring is in contact with the piston rod, an annular groove is horizontally formed in the inner side wall of the fixed ring, four identical circular arc baffles are arranged inside the annular groove, the four circular arc baffles are spliced into a ring, a spring is mounted between the circular arc baffles and the bottom of the annular groove, a dustproof pad is arranged on one side, away from the spring, of each circular arc baffle, a plurality of concave grooves are horizontally formed in the contact surface of the dustproof pad and the piston rod, and a sealing ring is arranged on the inner side wall of the fixed ring on the upper side of the annular groove. Dustproof sealing assembly's setting, can prevent effectively that the tiny granule from entering into inside the cylinder, setting through fixed ring, make whole dustproof sealing assembly installation dismantle conveniently, the setting of circular arc baffle, can promote dustproof pad besieged city round after tight with piston rod surface contact, the spring provides an elastic support power, the setting of a plurality of concave grooves, when making there is the tiny granule seepage to advance dustproof pad, need block layer upon layer through a plurality of concave grooves, prevent effectively that the granule from reacing inside the cylinder.

Preferably, the inner side wall of the sealing ring fixing circular ring is detachably mounted.

Preferably, the distance from the bottom of the concave groove to the piston rod is 0.5-0.8 cm.

Preferably, the circular arc baffle is in clearance fit with the annular groove.

The invention has the beneficial effects that:

according to the invention, the cylinder barrel is designed into the upper cylinder barrel and the lower cylinder barrel which can be separated, the interior of the cylinder barrel of the hydraulic cylinder after long-term working is convenient to clean, the abrasion of leaked fine particles is prevented, the upper cylinder barrel and the lower cylinder barrel are stably connected by the arrangement of the external thread barrel and the fixing groove in cooperation with the first threaded hole, the second threaded hole and the fixing bolt, the arrangement of the dustproof sealing assembly can effectively prevent the fine particles from entering the interior of the cylinder barrel, the whole dustproof sealing assembly is convenient to install and disassemble by the arrangement of the fixing ring, the arrangement of the arc baffle can push the dustproof pad to surround a circle and then tightly contact with the surface of the piston rod, the spring provides an elastic supporting force, and the arrangement of the plurality of concave grooves can effectively prevent the fine particles from reaching the interior of the cylinder barrel by blocking the plurality of the concave grooves layer by layer when the fine particles leak into the dustproof pad, the hydraulic oil cylinder sealing device is simple in structure, good in sealing effect, high in practicability and capable of guaranteeing long-term and efficient work of the hydraulic oil cylinder and avoiding damage of dust particles to the whole hydraulic oil cylinder.

Drawings

FIG. 1 is a schematic structural view of a sealed hydraulic cylinder according to the present invention;

FIG. 2 is a schematic perspective view of the upper cylinder barrel of the present invention;

FIG. 3 is a schematic perspective view of the lower cylinder of the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 1 according to the present invention;

FIG. 5 is an enlarged view of portion B of FIG. 1 according to the present invention;

FIG. 6 is a schematic top view of a dust seal assembly according to the present invention.

Reference numerals: 1-a cylinder barrel; 101-an upper cylinder barrel; 102-a lower cylinder; 2-a piston; 3-a piston rod; 4-oil filler hole; 5-external thread cylinder; 6-fixing the groove; 7-a sealing gasket; 8-a first threaded hole; 9-a second threaded hole; 10-fixing the bolt; 11-a stationary ring; 12-an annular groove; 13-arc baffle; 14-a spring; 15-a concave groove; 16-a sealing ring; 17-a screw; 18-dustproof pad.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easily understood, the invention is further described below with reference to the specific embodiments and the attached drawings, but the following embodiments are only the preferred embodiments of the invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention.

Specific embodiments of the present invention are described below with reference to the accompanying drawings.

Example 1

As shown in figures 1-6, a sealed hydraulic cylinder comprises a cylinder barrel 1 and a piston 2, the piston 2 is movably mounted inside the cylinder barrel 1, a piston rod 3 is fixedly connected to the center position of the upper end of the piston 2, the upper end of the piston rod 3 penetrates through the outer side of the upper end of the cylinder barrel 1, an oil injection hole 4 is arranged on one side of the lower end of the cylinder barrel 1, the cylinder barrel 1 comprises an upper cylinder barrel 101 and a lower cylinder barrel 102, an external thread barrel 5 is arranged on the lower end of the upper cylinder barrel 101 along a circle of a central axis, a fixing groove 6 is arranged on the upper end of the lower cylinder barrel 102 along a circle of the central axis, a sealing gasket 7 is arranged at the bottom of the fixing groove 6, a thread matched with the external thread barrel 5 is arranged on the inner side wall of the fixing groove 6, a first threaded hole 8 is arranged on the side wall of the upper cylinder barrel 101, a second threaded hole 9 is arranged on the side wall of the external, and the inner parts of the first threaded hole 8 and the second threaded hole 9 are movably provided with fixing bolts 10, and the contact position of the upper end of the upper cylinder 101 and the piston rod 3 is provided with a dustproof sealing assembly.

Dustproof seal assembly includes fixed ring 11, fixed ring 11 passes through screw 17 fixed mounting in the upper end of cylinder 1, fixed ring 11's inside wall and the contact of piston rod 3, fixed ring 11's inside wall is improved level and is provided with annular groove 12, annular groove 12's inside is provided with four the same circular arc baffle 13, and a ring is pieced together to four circular arc baffle 13, install spring 14 between circular arc baffle 13 and annular groove 12's the bottom, one side that spring 14 was kept away from to circular arc baffle 13 is provided with dustproof pad 18, dustproof pad 18 is provided with a plurality of concave grooves 15 with the contact surface of piston rod 3, be provided with sealing washer 16 on the fixed ring 11 inside wall of annular groove 12's the upside.

The working principle is as follows: the dustproof sealing assembly is fixedly arranged at the upper end of the cylinder barrel 1 through a screw 17, the four arc baffles 13 are spliced into a circular structure under the action of the elastic force of a spring 14 and are wrapped on the outer side of the piston rod 3, the dustproof pad 18 on the arc baffles 13 is tightly contacted with the surface of the piston rod 3, the sealing ring 16 is also attached to the surface of the piston rod 3, and in the telescopic process of the piston rod 3, the dustproof sealing assembly is tightly contacted with the surfaces of the dustproof pad 18 and the sealing ring 16, so that tiny dust particles are effectively prevented from entering the cylinder barrel 1;

certainly, under long-term work, micro particles may enter the interior of the dustproof pad 18 through repeated friction, at the moment, the concave groove 15 in the dustproof pad 18 plays a role in collecting the micro particles, all the micro particles entering the dustproof pad 18 pass through the multilayer concave grooves 15, one part of the micro particles is stored in the concave groove 15, a small number of the micro particles are leaked to the lower concave groove 15 and hardly enter the interior of the cylinder barrel 1, the whole dustproof sealing assembly is periodically taken down from the cylinder barrel 1, the abrasion conditions of the dustproof pad 18 and the sealing ring 16 are detected and replaced or cleaned;

if at hydraulic cylinder's work, there is the tiny particle to enter into the inside of cylinder 1, only need take off fixing bolt 10, then will rotate upper cylinder 101, external screw thread section of thick bamboo 5 at fixed recess 6 inside this moment rotates, break away from external screw thread section of thick bamboo 5 from fixed recess 6, alright clear away with the tiny particle of the inside of upper cylinder 101 and lower cylinder 102 respectively, prevent that the piston rod from napping, excessive wearing and tearing, warp, the oil leak, the piston rod location, the emergence of some bad circumstances such as direction performance reduction.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a sealed hydraulic cylinder, includes cylinder (1) and piston (2), its characterized in that:

the piston (2) is movably arranged in the cylinder barrel (1), a piston rod (3) is fixedly connected to the central position of the upper end of the piston (2), the upper end of the piston rod (3) penetrates through the outer side of the upper end of the cylinder barrel (1), an oil filling hole (4) is formed in one side of the lower end of the cylinder barrel (1), the cylinder barrel (1) comprises an upper cylinder barrel (101) and a lower cylinder barrel (102), an external threaded barrel (5) is arranged at the lower end of the upper cylinder barrel (101) along one circle of a central axis, a fixing groove (6) is formed in the upper end of the lower cylinder barrel (102) along one circle of the central axis, a sealing gasket (7) is arranged at the bottom of the fixing groove (6), threads matched with the external threaded barrel (5) are arranged on the inner side wall of the fixing groove (6), a first threaded hole (8) is formed in the side wall of the upper cylinder, first screw hole (8) and second screw hole (9) align after last cylinder (101) and lower cylinder (102) are screwed up, and the inside activity of first screw hole (8) and second screw hole (9) is provided with fixing bolt (10), the upper end of going up cylinder (101) is provided with dustproof seal assembly with piston rod (3) contact position.

2. A sealed hydraulic cylinder according to claim 1, characterized by: the depth of the fixed groove (6) is equal to the height of the external thread cylinder (5), and the thickness of the sealing gasket (7) is 0.1-0.2 cm.

3. A sealed hydraulic cylinder according to claim 1, characterized by: the upper cylinder (101) and the lower cylinder (102) are the same in height.

4. A sealed hydraulic cylinder according to claim 1, characterized by: the dustproof sealing assembly comprises a fixed ring (11), the fixed ring (11) is fixedly arranged at the upper end of the cylinder barrel (1) through a screw (17), the inner side wall of the fixed ring (11) is in contact with the piston rod (3), an annular groove (12) is horizontally arranged on the inner side wall of the fixed ring (11), four identical arc baffles (13) are arranged inside the annular groove (12), and the four arc baffles (13) are spliced into a circular ring, a spring (14) is arranged between the arc baffles (13) and the bottom of the annular groove (12), a dustproof pad (18) is arranged on one side of the arc baffle (13) far away from the spring (14), a plurality of concave grooves (15) are horizontally arranged on the contact surface of the dustproof pad (18) and the piston rod (3), and a sealing ring (16) is arranged on the inner side wall of the fixed circular ring (11) at the upper side of the annular groove (12).

5. A sealed hydraulic cylinder according to claim 4, characterized by: the inner side wall of the sealing ring (16) fixed ring (11) is detachably mounted.

6. A sealed hydraulic cylinder according to claim 4, characterized by: the distance from the bottom of the concave groove (15) to the piston rod (3) is 0.5-0.8 cm.

7. A sealed hydraulic cylinder according to claim 4, characterized by: the arc baffle (13) is in clearance fit with the annular groove (12).