CN117722413A - Multistage sealed hydraulic cylinder - Google Patents
Multistage sealed hydraulic cylinder Download PDFInfo
- Publication number
- CN117722413A CN117722413A CN202311610187.2A CN202311610187A CN117722413A CN 117722413 A CN117722413 A CN 117722413A CN 202311610187 A CN202311610187 A CN 202311610187A CN 117722413 A CN117722413 A CN 117722413A
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- China
- Prior art keywords
- shell
- air bag
- air
- hydraulic cylinder
- cylinder body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000000428 dust Substances 0.000 claims abstract description 11
- 238000004891 communication Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 12
- 238000007789 sealing Methods 0.000 abstract description 7
- 238000004804 winding Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 3
- 238000007790 scraping Methods 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
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- Actuator (AREA)
Abstract
The invention discloses a multistage sealing hydraulic cylinder, which belongs to the technical field of hydraulic cylinders and solves the problems of poor dustproof effect, poor sealing performance and unclean running environment in the prior art. According to the invention, the air bag is pressed by the pressing block, so that the piston rod is purged, sundries such as dust are effectively prevented from entering the cylinder body, and the air tightness of the cylinder body is improved.
Description
Technical Field
The invention belongs to the technical field of hydraulic cylinders, and particularly relates to a multistage sealing hydraulic cylinder.
Background
The multistage hydraulic cylinder is a hydraulic cylinder which can be formed by connecting a plurality of sections of hydraulic cylinders in series and is formed by assembling two or more piston type hydraulic cylinders, wherein a piston rod of a front stage piston cylinder is a cylinder barrel of a rear stage piston cylinder, so that a long working stroke is achieved and the hydraulic cylinder is a multistage sleeve type piston rod, and is generally called a telescopic hydraulic cylinder or a primary-secondary hydraulic cylinder. The multistage hydraulic cylinder is widely applied to small and medium-sized hydraulic systems such as engineering hoisting machinery, long-travel walking machinery, automobile tipping bucket and the like with narrow bottom or available space. Because the stroke of the piston rod of the multistage hydraulic cylinder is larger, impurities such as dust are easy to adhere to the outer wall of the piston rod, and the impurities possibly enter the cylinder barrel in the process of recovering the piston rod, so that the tightness of the cylinder barrel is reduced, and even the multistage hydraulic cylinder is damaged.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a multistage sealing hydraulic cylinder with good dustproof effect, good sealing performance and clean running environment.
In order to achieve the technical purpose, the multistage sealing hydraulic cylinder adopts the following technical scheme:
the utility model provides a multistage sealed pneumatic cylinder, includes the cylinder body and wears to establish the piston rod in the cylinder body, the tip of cylinder body is equipped with the dirt-proof ring, the piston rod wears to establish in the dirt-proof ring, be equipped with the cavity in the dirt-proof ring, the top of dirt-proof ring is equipped with a plurality of gas pockets, a plurality of the gas pocket with the cavity intercommunication, a plurality of the gas pocket is in the top of dirt-proof ring is the circumference and arranges, be equipped with the intake pipe on the outer wall of dirt-proof ring, the one end of intake pipe with the cavity intercommunication, the other end and the gas transmission equipment intercommunication of intake pipe, the gas transmission equipment pass through the intake pipe to the gas input in the cavity.
Preferably, the outer diameter of the dustproof ring is smaller than or equal to the outer diameter of the cylinder body, and the inner wall of the dustproof ring is attached to the outer wall of the piston rod.
Preferably, the air delivery device comprises a shell and an air bag, the shell is arranged on the outer wall of the cylinder body in a surrounding mode, the air bag is arranged in the shell in an adaptive mode, the bottom of the air bag is connected with the inner wall of the shell, and the air inlet pipe is communicated with the air bag.
Preferably, the radial cross sections of the shell and the air bag are annular.
Preferably, a pressing block is further arranged in the shell and positioned at the top of the air bag, and the pressing block moves up and down in the shell under the pulling of the pull rope.
Preferably, an air return pipe is arranged at the lower part of the outer side of the shell, the air return pipe is also communicated with the air bag, and a communication point of the air return pipe and the air bag is positioned below a communication point of the air inlet pipe and the air bag;
the air inlet pipe is provided with a first one-way valve, the air return pipe is provided with a second one-way valve, and the assembly directions of the first one-way valve and the second one-way valve are opposite.
Preferably, one end of the air inlet pipe is located at the outer side of the shell and is communicated with the dust-proof ring, the other end of the air inlet pipe penetrates into the shell downwards from the top of the shell and is communicated with the air bag, and the part of the air inlet pipe located in the shell is flexible.
Preferably, the top of piston rod is equipped with the extension board, be equipped with the hangers on the extension board, the one end of stay cord with wind and establish on the hangers, the one end of stay cord passes briquetting, gasbag and casing and extend to the below of casing, the below of cylinder body is equipped with electronic around the roller, the other end of stay cord winds to establish electronic around the roller.
Preferably, the pull rope is fixedly connected with the pressing block, a pair of bearings are arranged on the electric winding roller, and the bearings are connected with the cylinder body through the bracket.
Preferably, the pull rope is in a vertical state.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, in the process that the piston rod stretches out, the pressing block can be pulled upwards through the pull rope, so that the air bag is in an expansion state, and when the piston rod starts to retract, the pull rope is synchronously wound by the electric winding roller, so that the pressing block can squeeze the air bag, gas in the air bag is pressed into the dustproof ring through the air inlet pipe and then blown out through the air hole at the top of the dustproof ring, the blowing effect on the piston rod is realized, sundries such as dust are effectively prevented from entering the cylinder body, the cleanness of the running environment of the cylinder body is ensured, and the problem of reduced tightness of the cylinder body caused by the entry of the impurities is avoided.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a cross-sectional view showing the inner structure of the dust ring and the air inlet pipe in the present invention;
FIG. 3 is a cross-sectional view showing the internal structure of the gas cell and the briquette according to the present invention.
In the figure: 1. a cylinder; 2. a piston rod; 21. an extension plate; 22. hanging lugs; 3. a dust-proof ring; 31. a cavity; 32. air holes; 4. an air inlet pipe; 40. a first one-way valve; 5. a housing; 51. an air bag; 52. briquetting; 53. a pull rope; 6. an air return pipe; 60. a second one-way valve; 7. an electric winding roller; 71. a bearing; 72. and (3) a bracket.
Detailed Description
The invention is further described below with reference to the drawings and detailed description:
as shown in fig. 1-3, the multistage sealing hydraulic cylinder comprises a cylinder body 1 and a piston rod 2 penetrating through the cylinder body 1, wherein a dustproof ring 3 is arranged at the end part of the cylinder body 1, and the piston rod 2 penetrates through the dustproof ring 3; a cavity 31 is arranged in the dustproof ring 3, a plurality of air holes 32 are formed in the top of the dustproof ring 3, the air holes 32 are communicated with the cavity 31, and the air holes 32 are circumferentially distributed on the top of the dustproof ring 3; the outer wall of the dustproof ring 3 is provided with an air inlet pipe 4, one end of the air inlet pipe 4 is communicated with the cavity 31, the other end of the air inlet pipe 4 is communicated with air conveying equipment, and the air conveying equipment inputs air into the cavity 31 through the air inlet pipe 4.
The dust ring 3 sets up the top at cylinder body 1, can play the effect that prevents that the raise dust from entering into cylinder body 1, simultaneously, when gas-supply equipment is to intake pipe 4 air feed, gas enters into in the cavity 31, the rethread is discharged with the gas pocket 32 of cavity 31 intercommunication, because gas pocket 32 sets up at the top of dust ring 3, all have the gas blowout back in a plurality of gas pockets 32, can form an air curtain in the outside of piston rod 2, thereby effectively prevent the dust adhesion on piston rod 2, simultaneously, at the in-process that piston rod 2 retracted, the outer wall of piston rod 2 can be swept to the air curtain, thereby realize cleaning the outer wall of piston rod 2, effectively prevent that the dust from entering into cylinder body 1, ensure that cylinder body 1 has sufficient leakproofness.
The outer diameter of the dustproof ring 3 is smaller than or equal to the outer diameter of the cylinder body 1, and the inner wall of the dustproof ring 3 is attached to the outer wall of the piston rod 2.
The external diameter of the dustproof ring 3 is smaller, interference between an external object and the dustproof ring 3 can be prevented to the greatest extent, the dustproof ring 3 is ensured to be reliably fixed at the top of the cylinder body 1, and the inner wall of the dustproof ring 3 is attached to the outer wall of the piston rod 2, so that the dustproof ring 3 can realize the scraping effect on the piston rod 2 and plays a role in scraping dust.
The gas transmission equipment comprises a shell 5 and an air bag 51, wherein the shell 5 is arranged on the outer wall of the cylinder body 1 in a surrounding mode, the air bag 51 is arranged in the shell 5 in an adaptive mode, the bottom of the air bag 51 is connected with the inner wall of the shell 5, and the gas inlet pipe 4 is communicated with the air bag 51. By supplying air to the air inlet pipe 4 through the air bag 51, reliable supply of air to the cavity 31 can be achieved, ensuring continuous formation of an air curtain.
The radial cross sections of the shell 5 and the air bag 51 are annular. A pressing block 52 is further provided in the housing 5 and located at the top of the airbag 51, and the pressing block 52 moves up and down in the housing 5 under the pulling of a pull rope 53. In the process that the piston rod 2 stretches out, the pull rope 53 can pull the pressing block 52 upwards, so that the air bag 51 can be in an inflated state, in the process that the piston rod 2 stretches back inwards, the pull rope 53 can pull the pressing block 52 downwards, so that gas in the air bag 51 is pressed into the air inlet pipe 4 and then enters the cavity 31 from the air inlet pipe 4, and the air supply effect on the cavity 31 is achieved.
An air return pipe 6 is arranged at the lower part of the outer side of the shell 5, the air return pipe 6 is also communicated with the air bag 51, and the communication point of the air return pipe 6 and the air bag 51 is positioned below the communication point of the air inlet pipe 4 and the air bag 51; the air inlet pipe 4 is provided with a first one-way valve 40, the air return pipe 6 is provided with a second one-way valve 60, and the assembly directions of the first one-way valve 40 and the second one-way valve 60 are opposite. The air can enter the cavity 31 from the air bag 51 through the first one-way valve 40, and can enter the air bag 51 from the outside through the second one-way valve 60, so that when the pull rope 53 pulls the pressing block 52 to move upwards, the volume of the air bag 51 is increased, the external air can enter the air bag 51 through the air return pipe 6, the air in the air bag 51 is complemented, when the pull rope 53 pulls the pressing block 52 to move downwards, the volume of the air bag 51 is decreased, and the air in the air bag 51 can enter the cavity 31 through the air inlet pipe 4.
One end of the air inlet pipe 4 is located on the outer side of the shell 5 and is communicated with the dust-proof ring 3, the other end of the air inlet pipe 4 penetrates into the shell 5 downwards from the top of the shell 5 and is communicated with the air bag 51, and the part of the air inlet pipe 4 located in the shell 5 is flexible. Since the air bag 51 will change in volume under the action of the pressing block 52, and the air inlet pipe 4 has elasticity, the air bag 51 can be extended or retracted along with the change in volume of the air bag 51, so that the air in the air bag 51 can be ensured to reliably enter the cavity 31.
An extension plate 21 is arranged at the top of the piston rod 2, a hanging lug 22 is arranged on the extension plate 21, one end of a pull rope 53 is wound on the hanging lug 22, and one end of the pull rope 53 penetrates through the pressing block 52, the air bag 51 and the shell 5 and extends to the lower part of the shell 5; an electric winding roller 7 is arranged below the cylinder body 1, and the other end of the pull rope 53 is wound on the electric winding roller 7. Through the setting of extension board 21 and hangers 22 for piston rod 2 can drive briquetting 52 and upwards remove after stretching out, and then realize the tonifying qi effect to gasbag 51, and through the effect of winding up of electronic winding roller 7 to stay cord 53, can realize the drop-down effect to briquetting 52, and then realize the extrusion effect to gasbag 51, just also realized the air feed effect to cavity 31, ensure that the gas can be by a plurality of gas pockets 32 blowout and form the air curtain, and then play the sweeping effect to piston rod 2.
The stay cord 53 with fixed connection between the briquetting 52, the stay cord 53 is in vertical state, be equipped with a pair of bearing 71 on the electronic around roller 7, a pair of bearing 71 all pass through support 72 with cylinder body 1 is connected. Through the cooperation of support 72 and bearing 71, ensured that electronic around roller 7 can be in reliable operating condition, the electronic around roller 7 can reliably carry out the winding of stay cord 53 and wind and leave, ensures that stay cord 53 can drive briquetting 52 and reciprocate.
In summary, the present invention is not limited to the preferred embodiments, but includes all equivalent changes and modifications in shape, construction, characteristics and spirit according to the scope of the claims.
Claims (9)
1. The utility model provides a multistage sealed pneumatic cylinder, includes the cylinder body and wears to establish the piston rod in the cylinder body, the tip of cylinder body is equipped with the dirt-proof ring, the piston rod wears to establish in the dirt-proof ring, be equipped with the cavity in the dirt-proof ring, the top of dirt-proof ring is equipped with a plurality of gas pockets, a plurality of the gas pocket with the cavity intercommunication, a plurality of the gas pocket is in the top of dirt-proof ring is the circumference and arranges, be equipped with the intake pipe on the outer wall of dirt-proof ring, the one end of intake pipe with the cavity intercommunication, the other end and the gas transmission equipment intercommunication of intake pipe, the gas transmission equipment pass through the intake pipe to the gas input in the cavity.
2. The multi-stage sealed hydraulic cylinder of claim 1, wherein: the outer diameter of the dustproof ring is smaller than or equal to the outer diameter of the cylinder body, and the inner wall of the dustproof ring is attached to the outer wall of the piston rod.
3. The multi-stage sealed hydraulic cylinder of claim 1, wherein: the air conveying equipment comprises a shell and an air bag, the shell is arranged on the outer wall of the cylinder body in a surrounding mode, the air bag is arranged in the shell in an adaptive mode, the bottom of the air bag is connected with the inner wall of the shell, and the air inlet pipe is communicated with the air bag.
4. A multi-stage sealed hydraulic cylinder according to claim 3, wherein: the radial sections of the shell and the air bag are annular.
5. A multi-stage sealed hydraulic cylinder according to claim 3, wherein: a pressing block is further arranged in the shell and positioned at the top of the air bag, and the pressing block moves up and down in the shell under the pulling of the pull rope.
6. The multi-stage sealed hydraulic cylinder of claim 5, wherein: the air return pipe is also communicated with the air bag, the communication point of the air return pipe and the air bag is positioned below the communication point of the air inlet pipe and the air bag, a first one-way valve is arranged on the air inlet pipe, a second one-way valve is arranged on the air return pipe, and the assembly directions of the first one-way valve and the second one-way valve are opposite.
7. The multi-stage sealed hydraulic cylinder of claim 6, wherein: one end of the air inlet pipe is positioned at the outer side of the shell and is communicated with the dust ring, the other end of the air inlet pipe penetrates into the shell downwards from the top of the shell and is communicated with the air bag, and the part of the air inlet pipe positioned in the shell is flexible.
8. The multi-stage sealed hydraulic cylinder of claim 6, wherein: the top of piston rod is equipped with the extension board, is equipped with the hangers on the extension board, the one end of stay cord with wind and establish on the hangers, the one end of stay cord passes briquetting, gasbag and casing and extend to the below of casing, the below of cylinder body is equipped with electronic around the roller, the other end of stay cord winds and establishes on electronic around the roller.
9. The multi-stage sealed hydraulic cylinder of claim 8, wherein: the stay cord with fixed connection between the briquetting, be equipped with a pair of bearing on the electronic around the roller, a pair of the bearing all through the support with the cylinder body is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311610187.2A CN117722413A (en) | 2023-11-29 | 2023-11-29 | Multistage sealed hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311610187.2A CN117722413A (en) | 2023-11-29 | 2023-11-29 | Multistage sealed hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117722413A true CN117722413A (en) | 2024-03-19 |
Family
ID=90207858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311610187.2A Pending CN117722413A (en) | 2023-11-29 | 2023-11-29 | Multistage sealed hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117722413A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19626177C1 (en) * | 1996-06-29 | 1997-10-16 | Wandres Micro Cleaning | Setting device for plate cleaning device, workpiece, tool, or platform |
| JP2020131096A (en) * | 2019-02-18 | 2020-08-31 | ユーエスウラサキ株式会社 | Dust collection filter cleaning device and dust collector |
| CN111609197A (en) * | 2020-04-27 | 2020-09-01 | 铜陵兴荣阀门管件有限公司 | Combined type exhaust valve |
| CN212622495U (en) * | 2020-07-17 | 2021-02-26 | 杭州世驰科技有限公司 | Continuous environmental monitoring system of TVOC |
| CN212985668U (en) * | 2020-09-12 | 2021-04-16 | 江苏正峰液压科技有限公司 | Can blow clean flexible hydro-cylinder that becomes width of cloth |
| CN217026007U (en) * | 2021-12-31 | 2022-07-22 | 马鞍山市雨山冶金新材料有限公司 | Air cooling hydraulic cylinder for oversize converter sliding plate slag-stopping and tapping device |
| CN219865697U (en) * | 2023-04-18 | 2023-10-20 | 庆铃(临沂)新能源汽车科技有限公司 | Leakage-proof device for hydraulic cylinder |
-
2023
- 2023-11-29 CN CN202311610187.2A patent/CN117722413A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19626177C1 (en) * | 1996-06-29 | 1997-10-16 | Wandres Micro Cleaning | Setting device for plate cleaning device, workpiece, tool, or platform |
| JP2020131096A (en) * | 2019-02-18 | 2020-08-31 | ユーエスウラサキ株式会社 | Dust collection filter cleaning device and dust collector |
| CN111609197A (en) * | 2020-04-27 | 2020-09-01 | 铜陵兴荣阀门管件有限公司 | Combined type exhaust valve |
| CN212622495U (en) * | 2020-07-17 | 2021-02-26 | 杭州世驰科技有限公司 | Continuous environmental monitoring system of TVOC |
| CN212985668U (en) * | 2020-09-12 | 2021-04-16 | 江苏正峰液压科技有限公司 | Can blow clean flexible hydro-cylinder that becomes width of cloth |
| CN217026007U (en) * | 2021-12-31 | 2022-07-22 | 马鞍山市雨山冶金新材料有限公司 | Air cooling hydraulic cylinder for oversize converter sliding plate slag-stopping and tapping device |
| CN219865697U (en) * | 2023-04-18 | 2023-10-20 | 庆铃(临沂)新能源汽车科技有限公司 | Leakage-proof device for hydraulic cylinder |
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