CN102536957A - Pneumatic/hydraulic cylinder with buffering mechanism - Google Patents
Pneumatic/hydraulic cylinder with buffering mechanism Download PDFInfo
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- CN102536957A CN102536957A CN2012100437160A CN201210043716A CN102536957A CN 102536957 A CN102536957 A CN 102536957A CN 2012100437160 A CN2012100437160 A CN 2012100437160A CN 201210043716 A CN201210043716 A CN 201210043716A CN 102536957 A CN102536957 A CN 102536957A
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- permanent magnet
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- hydraulic cylinder
- pneumatic
- gas
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Abstract
The invention discloses a pneumatic/hydraulic cylinder with a buffering mechanism. The pneumatic/hydraulic cylinder comprises a piston, a cylinder body and an end cover fixed on the cylinder body, wherein a first permanent magnet is fixed on the inner side of the end cover; a second permanent magnet is arranged on a piston end face opposite to the first permanent magnet; and the polarities of opposite ends of the first permanent magnet and the second permanent magnet are same. A repulsive force between the first permanent magnet and the second permanent magnet is quickly increased nonlinearly, so that a buffer braking distance is shortened greatly. Since the axial size of the first permanent magnet is relatively small, compared with a buffering device with a plunger-type throttling buffer cavity, the pneumatic/hydraulic cylinder has the advantage that the axial size of the end cover is reduced remarkably.
Description
Technical field
The present invention relates to a kind of gas, oil hydraulic cylinder, be specifically related to a kind of gas, oil hydraulic cylinder that has damping mechanism.
Background technique
When the piston of the gas of extensive use, oil hydraulic cylinder rapidly moved to the end in the industry, the piston movement speed that all can form mechanical shock, particularly cylinder was very fast, impacted even more serious.This mechanical shock, the noise that not only can impact, and the working life of meeting appreciable impact related elements.When its terminal is arrived in the piston motion of gas, oil hydraulic cylinder; The kinetic energy of piston and pressure can cause the greater impact between piston and the end cap; This problem is difficult to be resolved satisfactorily always, and the buffering research of gas, oil hydraulic cylinder becomes a research focus at present domestic and international this field.Therefore, on cylinder and the oil hydraulic cylinder of speed, all need adopt damping mechanism greater than 0.2m/s.Both at home and abroad gas, the oil hydraulic cylinder of band damping mechanism commonly used all be basically the mode with exhaust throttle and reverse back pressure effect reduce piston movement velocity to reach the purpose that reduces or eliminate impact.
Plain edition single-piston rod double-acting cylinder as shown in Figure 1; Cylinder barrel is with after front and rear cover (being furnished with seal ring) is connected; Inner chamber forms a sealed space; A piston that links to each other with piston rod is arranged in this sealed space, seal ring is housed on the piston, piston is divided into two chambers to this sealed space.The front and rear cover of cylinder is provided with damping device, and damping device is made up of buffer throttling valve, buffer plunger and buffering seal ring etc.When cylinder stroke during, because the effect of damping device, can prevent the piston slap cylinder cap of high-speed motion near the terminal.
Above-mentioned damping device exists following shortcoming: a, cushioning effect poor; The movement velocity of b, piston is difficult for improving; The volume of c, gas, oil hydraulic cylinder is big; D, need add cover gas, a hydraulic pressure circulatory system, the throttling of control back pressure cavity liquid return produces damping and realizes buffer function, and complex structure is used inconvenience.
Summary of the invention
Goal of the invention of the present invention provides a kind of gas, oil hydraulic cylinder that has damping mechanism, and through the improvement of structure, simple in structure, compact, cost is low, and buffer distance is short, good buffer effect.
For reaching the foregoing invention purpose; The technological scheme that the present invention adopts is: a kind of gas, oil hydraulic cylinder that has damping mechanism; Comprise piston, cylinder body and be fixed on the end cap on the cylinder body; The inboard of said end cap is installed with first permanent magnet, and the piston end surface relative with this first permanent magnet is provided with second permanent magnet, and said first permanent magnet is identical with the polarity of the second permanent magnet opposite end.
In the technique scheme, be provided with first magnetic shield between said first permanent magnet and the end cap, be provided with second magnetic shield between said second permanent magnet and the piston.
Pass through said structure; When the piston of gas, oil hydraulic cylinder approaches end cap; Mutual repulsive force between first, second permanent magnet increases sharply, thereby the motion of piston is produced buffer-braking, and the movement velocity that reduces piston is to reach the purpose that reduces or eliminate impact.
Because the technique scheme utilization, the present invention compared with prior art has advantage:
1. the repulsive force between first permanent magnet of the present invention and second permanent magnet is to be non-linear quick increase, has therefore shortened the buffer-braking distance greatly; Simultaneously, the axial dimension of first permanent magnet is less, therefore compares with the damping device that adopts plunger type throttling buffer cavity, and the axial dimension of end cap obviously dwindles, so overall structure of the present invention is simple, volume is little.
2. the present invention is low to the seal request between piston and the cylinder body, and part is prone to processing, and cost is low.
3. the present invention is being equipped with magnetic shield between first permanent magnet and the end cap and between second permanent magnet and the piston, and permanent magnet can not cause magnetization to end cap and piston, can avoid the unnecessary ferrormagnetic substance material of its absorption.
Description of drawings
Fig. 1 is the structural representation of plain edition single-piston rod double-acting cylinder in the background technique;
Fig. 2 is the structural representation of the embodiment of the invention one;
Fig. 3 is the structural representation of the embodiment of the invention two;
Wherein: 1, piston; 2, cylinder body; 3, end cap; 4, first permanent magnet; 5, second permanent magnet; 6, first magnetic shield; 7, second magnetic shield.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Embodiment one: referring to shown in Figure 2, a kind of gas, oil hydraulic cylinder that has damping mechanism comprises piston 1, cylinder body 2 and is fixed on the rear end cover 3 on the cylinder body that the inboard of rear end cover 3 is installed with first magnetic shield 6, is embedded with annular first permanent magnet 4 in it.
Be installed with second magnetic shield 7 on the ear end face of said piston 1, be embedded with annular second permanent magnet 5 in it.
The front end of said first permanent magnet 4 is identical with the rear end polarity of second permanent magnet 5.
Pass through said structure; When the reciprocating motion of the pistons of gas, oil hydraulic cylinder when end face approaches the front-end face of rear end cover thereafter; Mutual repulsive force between first, second permanent magnet increases sharply; Thereby the motion to piston produces buffer-braking, and the movement velocity that reduces piston is to reach the purpose that reduces or eliminate impact.
Embodiment two: present embodiment two is between the front-end face of the front cover of gas, oil hydraulic cylinder and piston, having additional another set of magnetic buffer device on embodiment one the basis, and is as shown in Figure 3.
Claims (2)
1. gas, oil hydraulic cylinder that has damping mechanism; Comprise piston (1), cylinder body (2) and be fixed on the end cap (3) on the cylinder body; It is characterized in that: the inboard of said end cap (3) is installed with first permanent magnet (4); Be provided with second permanent magnet (5) with the relative piston end surface of this first permanent magnet (4), said first permanent magnet (4) is identical with the polarity of second permanent magnet (5) opposite end.
2. gas, the oil hydraulic cylinder that has damping mechanism according to claim 1; It is characterized in that: be provided with first magnetic shield (6) between said first permanent magnet (4) and the end cap (3), be provided with second magnetic shield (7) between said second permanent magnet (5) and the piston (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100437160A CN102536957A (en) | 2012-02-24 | 2012-02-24 | Pneumatic/hydraulic cylinder with buffering mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100437160A CN102536957A (en) | 2012-02-24 | 2012-02-24 | Pneumatic/hydraulic cylinder with buffering mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102536957A true CN102536957A (en) | 2012-07-04 |
Family
ID=46344683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100437160A Pending CN102536957A (en) | 2012-02-24 | 2012-02-24 | Pneumatic/hydraulic cylinder with buffering mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102536957A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597272A (en) * | 2014-12-22 | 2015-05-06 | 苏州欣航微电子有限公司 | Liquid column instrument panel |
| CN105864146A (en) * | 2016-04-26 | 2016-08-17 | 苏州普来可瑞机电技术有限公司 | Single-acting cylinder with in-cylinder return reset gas spring |
| CN108706519A (en) * | 2018-07-11 | 2018-10-26 | 厦门理工学院 | Buffer structure, control system and fork truck using the buffer structure |
| CN113618610A (en) * | 2021-08-17 | 2021-11-09 | 杭州职业技术学院 | Turning device is used in automobile wheel hub processing |
| CN115143359A (en) * | 2022-07-19 | 2022-10-04 | 大庆飞海石油科技有限公司 | Instrument sensor mounting device capable of reducing vibration |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4322255A1 (en) * | 1993-07-05 | 1995-01-19 | Festo Kg | Damping device |
| CN201521511U (en) * | 2009-11-13 | 2010-07-07 | 南京理工大学 | Oil cylinder with semi-driving controllable buffer at tail end |
| DE102009034790A1 (en) * | 2009-07-25 | 2011-01-27 | Robert Bosch Gmbh | Cylinder i.e. pneumatic cylinder, has permanent magnet arranged at piston, and electromagnet arranged at housing, where end position damping is provided by repulsive reciprocal effect obtained between permanent magnet and electromagnet |
| CN102235395A (en) * | 2011-06-09 | 2011-11-09 | 宁波亚德客自动化工业有限公司 | Magnetic coupling triaxial cylinder with adjustable buffer mechanism |
| CN202441669U (en) * | 2012-02-24 | 2012-09-19 | 苏州大学 | Pneumatic/hydraulic cylinder with buffering mechanism |
-
2012
- 2012-02-24 CN CN2012100437160A patent/CN102536957A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4322255A1 (en) * | 1993-07-05 | 1995-01-19 | Festo Kg | Damping device |
| DE102009034790A1 (en) * | 2009-07-25 | 2011-01-27 | Robert Bosch Gmbh | Cylinder i.e. pneumatic cylinder, has permanent magnet arranged at piston, and electromagnet arranged at housing, where end position damping is provided by repulsive reciprocal effect obtained between permanent magnet and electromagnet |
| CN201521511U (en) * | 2009-11-13 | 2010-07-07 | 南京理工大学 | Oil cylinder with semi-driving controllable buffer at tail end |
| CN102235395A (en) * | 2011-06-09 | 2011-11-09 | 宁波亚德客自动化工业有限公司 | Magnetic coupling triaxial cylinder with adjustable buffer mechanism |
| CN202441669U (en) * | 2012-02-24 | 2012-09-19 | 苏州大学 | Pneumatic/hydraulic cylinder with buffering mechanism |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597272A (en) * | 2014-12-22 | 2015-05-06 | 苏州欣航微电子有限公司 | Liquid column instrument panel |
| CN105864146A (en) * | 2016-04-26 | 2016-08-17 | 苏州普来可瑞机电技术有限公司 | Single-acting cylinder with in-cylinder return reset gas spring |
| CN108706519A (en) * | 2018-07-11 | 2018-10-26 | 厦门理工学院 | Buffer structure, control system and fork truck using the buffer structure |
| CN113618610A (en) * | 2021-08-17 | 2021-11-09 | 杭州职业技术学院 | Turning device is used in automobile wheel hub processing |
| CN115143359A (en) * | 2022-07-19 | 2022-10-04 | 大庆飞海石油科技有限公司 | Instrument sensor mounting device capable of reducing vibration |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120704 |