CN215830850U

CN215830850U - Swing hydro-cylinder that leakproofness is good

Info

Publication number: CN215830850U
Application number: CN202122291048.0U
Authority: CN
Inventors: 王建玺; 王志生; 阚亚威; 卞则东; 盛伟
Original assignee: ZHENJIANG DALI HYDRAULIC MOTOR CO Ltd
Current assignee: ZHENJIANG DALI HYDRAULIC MOTOR CO Ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-02-15
Anticipated expiration: 2031-09-22

Abstract

The utility model discloses a swing oil cylinder with good sealing performance. This swing hydro-cylinder that leakproofness is good includes the cylinder body, the cylinder body runs through the pivot, the skeleton sealing washer has been cup jointed at the both ends of pivot, the first ring channel of depositing skeleton sealing washer is seted up to the cylinder body, pivot integrated into one piece has at cylinder body inner chamber pivoted blade, first seal assembly has been cup jointed in the outside of blade, first seal assembly's lateral wall is hugged closely in the cylinder body inside wall, the inside wall of cylinder is provided with and blocks blade pivoted stopper, the second seal assembly has been cup jointed in the outside of stopper, second seal assembly's lateral wall is hugged closely in the outer peripheral face of cylinder body inside wall and pivot, the stopper, pivot and blade are cut apart into first cavity and second cavity with the cylinder body inner chamber, first through-hole has been seted up to one side that first cavity is being in turn to the stopper, the second through-hole has been seted up to one side that the stopper in turn to the second cavity. The utility model solves the problems of low total efficiency and short service life of the existing swing hydraulic cylinder.

Description

Swing hydro-cylinder that leakproofness is good

Technical Field

The utility model relates to the field of machinery, in particular to a swing oil cylinder with good sealing performance.

Background

The swing hydraulic cylinder is also called swing hydraulic motor, it is a hydraulic actuator whose output shaft can make reciprocating swing movement, and its outstanding advantage is that it can make load directly obtain reciprocating swing movement without any speed-changing mechanism. However, the existing swing hydraulic cylinder generally has the problems that the moving part is difficult to seal, the moving gap inevitably causes internal leakage between high-pressure and low-pressure cavities, and the internal leakage is greatly increased along with the improvement of working pressure, so that the total efficiency and the service life of the swing hydraulic cylinder are reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a swing oil cylinder which improves the total efficiency and prolongs the service life and has good sealing property aiming at the defects in the prior art.

In order to achieve the purpose, the swing oil cylinder with good sealing performance adopts the technical scheme that:

a swing oil cylinder with good sealing performance comprises a cylinder body, a rotating shaft penetrates through the cylinder body, framework sealing rings are sleeved at two ends of the rotating shaft, a first annular groove for storing the framework sealing rings is formed in the cylinder body, blades rotating in an inner cavity of the cylinder body are integrally formed on the rotating shaft, a first sealing assembly is sleeved on the outer sides of the blades, the outer side wall of the first sealing assembly is tightly attached to the inner side wall of the cylinder body, a limiting block for preventing the blades from rotating is arranged on the inner side wall of the cylinder body, a second sealing assembly is sleeved on the outer side of the limiting block, the outer side wall of the second sealing assembly is tightly attached to the inner side wall of the cylinder body and the outer peripheral surface of the rotating shaft, and the limiting block, the rotating shaft and the blades divide the inner cavity of the cylinder body into a first cavity and a second cavity, the first cavity is close to one side of the limiting block, the second cavity is close to one side of the limiting block, and the first through hole and the second through hole are used for accessing or discharging high-pressure oil.

Preferably, the circumferential surface of the outer side of the limiting block is provided with a first groove and a second groove, the first groove is used for communicating the first through hole with the first cavity, and the second groove is used for communicating the second through hole with the second cavity.

Preferably, the end faces of the two sides of the limiting block are provided with adjusting blocks, the adjusting blocks are fixedly connected to the inner cavity of the cylinder body, and gaps are reserved between the outer side faces of the adjusting blocks and the circumferential face of the inner cavity of the cylinder body.

Preferably, overflow valves are arranged on the outer sides of the first through hole and the second through hole and fixedly connected to the outer side of the cylinder body.

Preferably, the middle part of pivot sets up the annular boss with blade integrated into one piece, and the self-lubricating copper bearing has been cup jointed to annular boss both sides, and the self-lubricating copper bearing is in skeleton seal's inboard, the second ring channel of depositing self-lubricating copper bearing is seted up to the cylinder body, and the third seal assembly has been cup jointed to the one end that the self-lubricating copper bearing is next to annular boss, and the third ring channel of depositing third seal assembly is seted up to the cylinder body.

Preferably, the outer side of the framework sealing ring is provided with a shaft end cover, and the shaft end cover is fixedly connected to the outer side of the cylinder body to compress the framework sealing ring in the first annular groove.

Preferably, a dustproof ring is arranged on the outer side of the shaft end cover and is sleeved on the outer peripheral surface of the rotating shaft.

Compared with the prior art, the utility model has the following advantages:

1. blade and pivot integrated into one piece can guarantee not having between blade and the pivot and leak, also can guarantee that the pivot output is stable, cup joints in the first sealing member in the blade outside and cup joints in the second sealing member in the stopper outside, reduces the internal leakage volume of high-pressure oil between first cavity and second cavity, and skeleton sealing washer and third seal assembly have reduced the outer leakage volume of pivot tip to the total efficiency and the life of swing hydro-cylinder have been improved.

2. The first groove is communicated with the first through hole and the first cavity, and the second groove is communicated with the second through hole and the second cavity, so that the swing of the blade is stable and reliable.

3. And setting the size of the adjusting block according to requirements so as to determine the swing angle of the blade.

4. And providing an overflow valve for carrying out overload protection on the cylinder body.

5. The self-lubricating copper bearing is provided, so that the rotating shaft can rotate conveniently, and the swing oil cylinder can bear larger radial force.

Drawings

Fig. 1 is a plan view of a swing cylinder of the present invention having good sealability.

Fig. 2 is a sectional view a-a of fig. 1.

Fig. 3 is a sectional view B-B of fig. 1.

Fig. 4 is an enlarged view at C of fig. 3.

Fig. 5 is a schematic structural view of the rotating shaft.

Fig. 6 is a schematic structural diagram of a limiting block.

The device comprises a cylinder body 1, a first annular groove 11, a second annular groove 12, a second annular groove 13, a first cavity 14, a second cavity 15, a first through hole 16, a second through hole 17, a rotating shaft 2, an annular boss 21, blades 22, a first sealing assembly 23, a self-lubricating copper bearing 3, a third sealing assembly 31, a framework sealing ring 4, a shaft end cover 5, a dust ring 6, a limiting block 7, a second sealing assembly 71, a first groove 72, a second groove 73, an adjusting block 8 and an overflow valve 9.

Detailed Description

The present invention is further illustrated by the following description in conjunction with the accompanying drawings, which are to be construed as merely illustrative and not limitative of the remainder of the disclosure, and on reading the disclosure, various equivalent modifications thereof will become apparent to those skilled in the art and fall within the limits of the appended claims.

As shown in figures 1-6, a swing oil cylinder with good sealing performance comprises a cylinder body 1, a rotating shaft 2 penetrates through the cylinder body, an annular boss 21 is arranged in the middle of the rotating shaft, a self-lubricating copper bearing 3 and a framework sealing ring 4 are sequentially sleeved on two sides of the annular boss from inside to outside, the cylinder body is provided with a first annular groove 11 for storing the framework sealing ring and a second annular groove 12 for storing the self-lubricating copper bearing, one end of the self-lubricating copper bearing, which is close to the annular boss, is sleeved with a third sealing assembly 31, the cylinder body is provided with a third annular groove 13 for storing the third sealing assembly, a shaft end cover 5 is arranged on the outer side of the framework sealing ring, the shaft end cover is fixedly connected to the outer side of the cylinder body to tightly press the framework sealing ring in the first annular groove, a dust ring 6 is arranged on the outer side of the shaft end cover, the dust ring is sleeved on the outer peripheral surface of the rotating shaft, the boss is integrally formed on a rotating blade 22 in the inner cavity of the cylinder body, and the outer side of the blade is sleeved with a first sealing assembly 23, the outer side wall of the first sealing component is tightly attached to the inner side wall of the cylinder body, the inner side wall of the cylinder body is fixedly connected with a limiting block 7 for blocking the rotation of the blade, the outer side of the limiting block is sleeved with a second sealing component 71, the outer side wall of the second sealing component is tightly attached to the inner side wall of the cylinder body and the outer peripheral surface of the rotating shaft, the limiting block, a boss and the blade divide the inner cavity of the cylinder body into a first cavity 14 and a second cavity 15, the first cavity and the second cavity are respectively provided with an adjusting block 8, the two adjusting blocks are positioned at two sides of the limiting block, the adjusting blocks are fixedly connected to the inner cavity of the cylinder body, a gap is reserved between the outer side surface of each adjusting block and the peripheral surface of the inner cavity of the cylinder body, the peripheral surface of the outer side of the limiting block is provided with a first groove 72 and a second groove 73, the peripheral surface of the inner cavity of the cylinder body, which is just opposite to the first groove, is provided with a first through hole 16, the first groove is used for communicating the first through hole with the first cavity with the first groove, the peripheral surface of the inner cavity, and the second groove, and overflow valves 9 are arranged on the outer sides of the first through hole and the second through hole and are fixedly connected to the outer side of the cylinder body.

A concrete working process and principle of a swing oil cylinder with good sealing performance are as follows: high-pressure oil enters the first cavity from the first through hole, the blade rotates towards the second cavity, the high-pressure oil in the second cavity is discharged from the second through hole until the blade props against the adjusting block in the second cavity, the high-pressure oil enters from the second through hole at the moment, the blade is pushed to turn to the first cavity, the high-pressure oil in the first cavity is discharged from the first through hole until the blade props against the adjusting block in the first cavity, and therefore the swinging of the rotating shaft is achieved repeatedly. The utility model improves the total efficiency and the service life of the swing oil cylinder, and the swing oil cylinder can bear larger radial force.

Claims

1. The utility model provides a swing hydro-cylinder that leakproofness is good which characterized in that: including the cylinder body, the cylinder body runs through the pivot, the skeleton seal circle has been cup jointed at the both ends of pivot, the first ring channel of depositing the skeleton seal circle is seted up to the cylinder body, pivot integrated into one piece has at cylinder body inner chamber pivoted blade, first seal assembly has been cup jointed in the outside of blade, first seal assembly's lateral wall is hugged closely in the cylinder body inside wall, the cylinder body inside wall is provided with and blocks blade pivoted stopper, second seal assembly has been cup jointed in the outside of stopper, second seal assembly's lateral wall is hugged closely in the outer peripheral face of cylinder body inside wall and pivot, the stopper, pivot and blade are cut apart into first cavity and second cavity with the cylinder body inner chamber, first through-hole has been seted up to one side that the stopper is being followed to first cavity, the second through-hole has been seted up to one side that the stopper is followed to the second cavity, first through-hole and second through-hole are used for inserting or discharging high pressure oil.

2. The swing cylinder with good sealing performance as claimed in claim 1, wherein: the peripheral face of the outer side of the limiting block is provided with a first groove and a second groove, the first groove is used for communicating the first through hole with the first cavity, and the second groove is used for communicating the second through hole with the second cavity.

3. The swing cylinder with good sealing performance as claimed in claim 2, characterized in that: the end faces of two sides of the limiting block are provided with adjusting blocks which are fixedly connected with the inner cavity of the cylinder body, and gaps are reserved between the outer side faces of the adjusting blocks and the circumferential face of the inner cavity of the cylinder body.

4. The swing cylinder with good sealing performance as claimed in claim 2, characterized in that: and overflow valves are arranged on the outer sides of the first through hole and the second through hole and fixedly connected to the outer side of the cylinder body.

5. The swing cylinder with good sealing performance as claimed in claim 1, wherein: the middle part of pivot sets up the annular boss with blade integrated into one piece, and the self-lubricating copper bearing has been cup jointed to annular boss both sides, and the self-lubricating copper bearing is in skeleton seal's inboard, the second ring channel of depositing self-lubricating copper bearing is seted up to the cylinder body, and the third seal assembly has been cup jointed to the one end that the self-lubricating copper bearing is next to annular boss, and the third ring channel of depositing third seal assembly is seted up to the cylinder body.

6. The swing cylinder with good sealing performance as claimed in claim 5, wherein: the skeleton sealing washer outside is provided with the axle head cover, and the axle head cover rigid coupling compresses tightly the skeleton sealing washer in first ring channel in the cylinder body outside.

7. The swing cylinder with good sealing performance as claimed in claim 6, characterized in that: and a dustproof ring is arranged on the outer side of the shaft end cover and is sleeved on the outer side of the rotating shaft.