CN101598156B - Floating-type cushion cylinder - Google Patents
Floating-type cushion cylinder Download PDFInfo
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- CN101598156B CN101598156B CN2009100324813A CN200910032481A CN101598156B CN 101598156 B CN101598156 B CN 101598156B CN 2009100324813 A CN2009100324813 A CN 2009100324813A CN 200910032481 A CN200910032481 A CN 200910032481A CN 101598156 B CN101598156 B CN 101598156B
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Abstract
The invention discloses a floating-type cushion cylinder, comprising a cylinder barrel, a cylinder bottom head, a piston rod and a piston; wherein, the piston rod is extended back to front; a back end surface of the piston rod is provided with a cushion plunger which is in integral structure with the piston; the cylinder bottom head is provided with stepped holes which are located on the same axes with the piston rod; the diameter of a small hole of the stepped holes is larger than the external diameter of the piston rod, while a big hole of the stepped holes is internally provided with a cushion collar and an internal circlip which is used for preventing the cushion collar from sliding out in a floating manner; the cushion collar is provided with a cushion hole; a cushion gap is formed between the excircle of the cushion plunger and the cushion hole after the cushion plunger is driven by hydraulic oil to enter into the cushion hole. In the invention, the cushion collar is designed in a floating type, so when entering into the cushion hole, the cushion plunger can be automatically centered to reduce the cushion gap, thus having better cushion effect, effectively preventing striking when the cylinder cushion retracts to the cylinder bottom; and the cylinder has fine initiation. The invention is simple in structure and strong in practicability.
Description
Technical field
The present invention relates to the hydraulic jack field, especially a kind of floating-type cushion cylinder that prevents to produce when oil cylinder piston is withdrawn into cylinder bottom bump.
Background technique
Usually the used buffer structure design of hydraulic jack generally is buffer plunger of processing on piston rod; When piston-retraction arrives cylinder bottom, buffer plunger indentation cushion hole, the gap of cushion hole and buffer plunger is very little; Make the oil return of oil hydraulic cylinder produce throttling action; Produce back pressure, thereby play buffer function, the quality of its cushioning effect is by the gap length decision of buffer plunger and cushion hole.Buffer plunger and cushion hole generally are changeless in the structure in the past, can not automatic centering owing to there is inevitable machining error, the buffer gap can not be designed too little, otherwise be easy to stuck, so cushioning effect is bad; Also have plenty of at unsteady cushion collar of buffer plunger outside increase and play the automatic centering effect, but this cushion collar need nitriding treatment improve surface hardness through quenching perhaps, the process-cycle is long, and cost is high.
Summary of the invention
The technical problem that the present invention will solve is: overcome the deficiency of existing technology, a kind of floating-type cushion cylinder is provided, the floating-type cushion structure that it has can effectively prevent the impingement phenomenon that produces when oil cylinder piston is withdrawn into cylinder bottom, and is simple in structure, good buffer effect.
The technical solution adopted for the present invention to solve the technical problems is: a kind of floating-type cushion cylinder, comprise cylinder barrel, cylinder bottom head, piston rod and piston, and it is the place ahead that the setting piston rod stretches out direction; Otherwise be the rear, described cylinder bottom head is fixed in the cylinder barrel rear end, and piston is fixed in the piston rod rear end; Circle liquid sealing in its cylindrical and the cylinder barrel; Piston is divided into rod chamber and rodless cavity with the inner chamber of cylinder barrel, and cylinder bottom head is provided with and is used for the oil inlet hole that piston rod stretches out, and has the buffer plunger that is structure as a whole with piston rod on the ear end face of piston rod; It is the shoulder hole of same axis that described cylinder bottom head is provided with piston rod; The little bore portion of shoulder hole communicates with oil inlet hole, and the diameter of little bore portion is greater than the external diameter of buffer plunger, and the big bore portion of shoulder hole is positioned at the front end of cylinder bottom head; Can float in the big bore portion and be provided with cushion collar and can prevent that cushion collar from using back-up ring to the hole that the rodless cavity direction skids off; Have cushion hole on the described cushion collar, buffer plunger has between the cylindrical of buffer plunger and the cushion hole and makes hydraulic oil play the buffer gap of meter out effect after the hydraulic oil of rod chamber promotes down the entering cushion hole.
Furtherly; For when oil cylinder starts; The hydraulic oil of oil inlet hole can get into rodless cavity promotion piston rod fast and stretch out, and described cushion collar comprises body and be located at the body cylindrical and the annular arc piece that is uniformly distributed with that the outside diameter that the arc piece constitutes is less than the diameter of the big bore portion of shoulder hole.
Further, described arc number of blocks is six, and with body be the integrative-structure of integral manufacturing.
When getting into the cushion hole on the cushion collar for the assurance buffer plunger, automatic centering better reduces the buffer gap, and the rearward end of described buffer plunger is a cone, and the front end of cushion hole has the female cone hole that matches with cone.
The invention has the beneficial effects as follows: the present invention is designed to relocatable form with cushion collar; When buffer plunger gets into cushion hole, can automatic centering to reduce the buffer gap, have cushioning effect preferably; Can effectively prevent the impingement phenomenon that produces when oil cylinder piston is withdrawn into cylinder bottom; And the startability of oil cylinder is good, and is simple in structure, practical.
Description of drawings
Below in conjunction with accompanying drawing and mode of execution the present invention is further specified.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the working state schematic representation that the present invention gets into buffering.
Fig. 3 is the partial enlarged drawing at the place of A shown in Fig. 2.
Fig. 4 is the working state schematic representation of the present invention when starting.
Fig. 5 is the partial enlarged drawing at the place of B shown in Fig. 4.
Fig. 6 is the structural representation of the said cushion collar of invention.
Back-up ring is used in 1. cylinder barrels, 11. rod chambers, 12. rodless cavities, 2. cylinder bottom heads, 21. oil inlet holes, 22. shoulder holes, 221. aperture parts, 222. big bore portion 3. piston rods 31. buffer plungers 4. pistons 5. cushion collars 51. cushion holes 52. bodies 53. arc pieces, 6. holes among the figure
Embodiment
Combine accompanying drawing and preferred implementation that the present invention is further described now.These accompanying drawings are the schematic representation of simplification, basic structure of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
Concrete structure like a kind of floating-type cushion cylinder of Fig. 1～shown in Figure 6; Comprise cylinder barrel 1, cylinder bottom head 2, piston rod 3 and piston 4, it is the place ahead that setting piston rod 3 stretches out direction, otherwise is the rear; Described cylinder bottom head 2 is fixed in cylinder barrel 1 rear end; Piston 4 is fixed in piston rod 3 rear ends, circle liquid sealing in the cylindrical of piston 4 and the cylinder barrel 1, and piston 4 is divided into rod chamber 11 and rodless cavity 12 with the inner chamber of cylinder barrel 1; Cylinder bottom head 2 is provided with and is used for the oil inlet hole 21 that piston rod 3 stretches out; Have the buffer plunger 31 that is structure as a whole with piston rod 3 on the ear end face of piston rod 3, have on the described cylinder bottom head 2 with piston rod 3 and be the shoulder hole 22 of same axis, the aperture part 221 of shoulder hole 22 communicates with oil inlet hole 21; And the diameter of aperture part 221 is greater than the external diameter of buffer plunger 31; The big bore portion 222 of shoulder hole 22 is positioned at the front end of cylinder bottom head 2, in big bore portion 222, can float be provided with cushion collar 5 and can prevent cushion collar 5 to hole that rodless cavity 12 directions skid off with back-up ring 6, have cushion hole 51 on the described cushion collar 5; Buffer plunger 31 has between the cylindrical of buffer plunger 31 and the cushion hole 51 and makes hydraulic oil play the buffer gap of meter out effect after the hydraulic oil of rod chamber 11 promotes down entering cushion hole 51.
As shown in Figure 6; Described cushion collar 5 comprises body 52 and is located at body 52 cylindricals and the arc piece 53 that is uniformly distributed with of annular, and arc piece 53 quantity are six, and with body 52 be the integrative-structure of integral manufacturing; Cushion hole 51 is positioned at body 52 central positions; The outside diameter that described arc piece 53 constitutes is less than the diameter of the big bore portion 222 of shoulder hole 22, and also has the gap between big bore portion 222 inner side surfaces of cushion collar 5 and shoulder hole 22, and cushion collar 5 floating grounds are placed in the big bore portion 222 of shoulder hole 22; Space between the arc piece 53 can be when oil cylinder starts; The hydraulic oil of guaranteeing oil inlet hole 21 can get into rodless cavity 12 fast and act on the piston 4, stretches out thereby promote piston rod 3, makes oil cylinder have startability faster.
The rearward end of described buffer plunger 31 is a conical structure; Front end at cushion hole 51 has the female cone hole structure that matches with cone, like this when buffer plunger 31 gets into the cushion hole 51 on the cushion collars 5, and automatic centering better; Reduce the buffer gap, improve cushioning effect.
Working principle of the present invention is following: like Fig. 2, shown in Figure 3, when the hydraulic oil in the rod chamber 11 of cylinder barrel 1 promotes piston 4 withdrawal cylinder bottom heads 2, drive piston rod 3 and withdraw synchronously; The cushion hole 51 that buffer plunger 31 on the piston rod 3 gets on the cushion collar 5 owing to have the gap between buffer plunger 31 and the cushion hole 51, makes the hydraulic oil of backflow produce meter out; Thereby in rodless cavity 12, produce back pressure; Arrow among Fig. 3 is represented the flow direction of hydraulic oil, and at this moment, piston rod 3 reductions of speed slowly get into; Withdrawal to piston 4 plays buffer function thus; Avoid piston 4 and cylinder bottom head 2 to clash into, this moment, big bore portion 222 inner side surfaces of cushion collar 5 trailing flanks and shoulder hole 22 were close to; Like Fig. 4, shown in Figure 5; When oil cylinder restarts; The hydraulic oil that oil inlet hole 21 gets into promotes big bore portion 222 inner side surfaces of cushion collar 5 disengaging shoulder holes 22 and is blocked with back-up ring 6 by the hole, and hydraulic oil flows to through the space between the arc piece 53 of cushion collar 5 and promotes pistons 4 in the rodless cavity 12, and the arrow among Fig. 5 is represented the flow direction of hydraulic oil; Make piston rod 3 stretch out cylinder barrel 1, thereby start oil cylinder fast.
Key of the present invention is cushion collar 5 is designed to floating structure, when buffer plunger 31 gets into cushion holes 51, and can automatic centering; Reduce the buffer gap, when oil cylinder starts, through moving axially of cushion collar 5; Hydraulic oil acts on rapidly on the piston 4, and the startability of oil cylinder is good.Unsteady buffering form of the present invention; Also can play the effect of one-way valve; Can cancel oil cylinder during actual the use and start used one-way valve, the buffering of oil cylinder fore-end when this unsteady buffer structure can also be used for piston rod 3 and stretches out is to avoid that the oil cylinder front end is produced bump.
With above-mentioned be enlightenment according to the working of an invention mode, through above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from technological thought of the present invention.Technical scope of the present invention is not limited to the content on the specification, must confirm its technical scope according to the claim scope.
Claims (4)
1. floating-type cushion cylinder; Comprise cylinder barrel (1), cylinder bottom head (2), piston rod (3) and piston (4), it is the place ahead that setting piston rod (3) stretches out direction, otherwise is the rear; Cylinder bottom head (2) is fixed in cylinder barrel (1) rear end; Piston (4) is fixed in piston rod (3) rear end, circle liquid sealing in its cylindrical and the cylinder barrel (1), and piston (4) is divided into rod chamber (11) and rodless cavity (12) with the inner chamber of cylinder barrel (1); Cylinder bottom head (2) is provided with and is used for the oil inlet hole (21) that piston rod (3) stretches out; Have the buffer plunger (31) that is structure as a whole with piston rod (3) on the ear end face of piston rod (3), it is characterized in that: described cylinder bottom head (2) is provided with piston rod (3) and is the shoulder hole of same axis (22), and the little bore portion (221) of shoulder hole (22) communicates with oil inlet hole (21); And the diameter of little bore portion (221) is greater than the external diameter of buffer plunger (31); The big bore portion (222) of shoulder hole (22) is positioned at the front end of cylinder bottom head (2), can float in the big bore portion (222) be provided with cushion collar (5) and can prevent cushion collar (5) to hole that rodless cavity (12) direction skids off with back-up ring (6), have cushion hole (51) on the cushion collar (5); Buffer plunger (31) has between the cylindrical of buffer plunger (31) and the cushion hole (51) and makes hydraulic oil play the buffer gap of meter out effect after the hydraulic oil of rod chamber (11) promotes down entering cushion hole (51).
2. floating-type cushion cylinder according to claim 1; It is characterized in that: described cushion collar (5) comprises body (52) and is located at body (52) cylindrical and the annular arc piece (53) that is uniformly distributed with that the outside diameter that arc piece (53) constitutes is less than the diameter of the big bore portion (222) of shoulder hole (22).
3. floating-type cushion cylinder according to claim 2 is characterized in that: described arc piece (53) quantity is six, and with body (52) be the integrative-structure of integral manufacturing.
4. floating-type cushion cylinder according to claim 1 is characterized in that: the rearward end of described buffer plunger (31) has conical structure, and the front end of cushion hole (51) has the female cone hole that matches with cone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100324813A CN101598156B (en) | 2009-06-17 | 2009-06-17 | Floating-type cushion cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100324813A CN101598156B (en) | 2009-06-17 | 2009-06-17 | Floating-type cushion cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101598156A CN101598156A (en) | 2009-12-09 |
| CN101598156B true CN101598156B (en) | 2012-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100324813A Active CN101598156B (en) | 2009-06-17 | 2009-06-17 | Floating-type cushion cylinder |
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| Country | Link |
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| CN (1) | CN101598156B (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720727A (en) * | 2012-06-15 | 2012-10-10 | 常州液压成套设备厂有限公司 | Furnace cover oil cylinder with back buffer function |
| CN102900727A (en) * | 2012-11-14 | 2013-01-30 | 徐州中矿大贝克福尔科技有限公司 | Device and method for buffering main oil cylinder of paste filling pump in coal mine |
| CN103438050B (en) * | 2013-09-02 | 2015-11-25 | 山西北方机械制造有限责任公司 | The cylinder apparatus cushioned after a kind of off-load |
| CN103644168A (en) * | 2013-11-27 | 2014-03-19 | 合肥海源机械有限公司 | Improved structure of buffering oil cylinder device |
| JP6159938B2 (en) * | 2014-04-14 | 2017-07-12 | Smc株式会社 | Fluid pressure cylinder |
| CN105545869B (en) * | 2016-02-22 | 2018-07-17 | 武汉科技大学 | A kind of oil cylinder of buffer structure |
| CN106594151B (en) * | 2016-12-05 | 2019-02-22 | 一重集团大连设计研究院有限公司 | A kind of blanking cushion dashpot based on damping principle |
| CN106930997A (en) * | 2017-04-28 | 2017-07-07 | 合肥长源液压股份有限公司 | A kind of hydraulic cylinder with valve block |
| CN108412836A (en) * | 2018-05-14 | 2018-08-17 | 阀安格水处理***(太仓)有限公司 | A kind of adjustable hydraulic cylinder of buffer length |
| CN108799227B (en) * | 2018-06-23 | 2020-12-11 | 江苏创良智能数控科技有限公司 | Oil cylinder buffer valve and speed reduction oil cylinder for numerical control machine tool |
| CN109987474A (en) * | 2019-04-15 | 2019-07-09 | 上海青浦电梯配件有限公司 | A kind of floating valve plate-type buffer |
| CN110242639B (en) * | 2019-04-26 | 2020-11-06 | 平高集团有限公司 | Hydraulic device working cylinder and plug thereof |
| CN110242640B (en) * | 2019-04-26 | 2020-11-06 | 平高集团有限公司 | Buffer sleeve, working cylinder of hydraulic device and hydraulic operating mechanism |
| CN111594509B (en) * | 2020-06-19 | 2024-06-25 | 韶关液压件厂有限公司 | Hydraulic cylinder capable of automatically adjusting piston clearance |
| CN112648258B (en) * | 2020-12-29 | 2024-04-26 | 江苏恒立液压股份有限公司 | Buffer cylinder before and after oil-gas mixing |
| CN216642638U (en) * | 2021-12-20 | 2022-05-31 | 娄底市中兴液压件有限公司 | Hydraulic cylinder, hydraulic system and working machine |
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| US4166612A (en) * | 1976-04-30 | 1979-09-04 | Stabilus Gmbh | Gas spring with means for impeding piston movement away from one terminal position |
| CN1721726A (en) * | 2004-07-14 | 2006-01-18 | 本田技研工业株式会社 | Air damper |
| CN101235837A (en) * | 2008-03-07 | 2008-08-06 | 汪立平 | Constant throttle -type amortization structure high pressure oil cylinder |
| CN201170229Y (en) * | 2008-03-07 | 2008-12-24 | 汪立平 | Buffering high pressure oil cylinder |
| CN201412408Y (en) * | 2009-06-17 | 2010-02-24 | 江苏恒立高压油缸有限公司 | Floating type buffering hydro cylinder |
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2009
- 2009-06-17 CN CN2009100324813A patent/CN101598156B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4166612A (en) * | 1976-04-30 | 1979-09-04 | Stabilus Gmbh | Gas spring with means for impeding piston movement away from one terminal position |
| CN1721726A (en) * | 2004-07-14 | 2006-01-18 | 本田技研工业株式会社 | Air damper |
| CN101235837A (en) * | 2008-03-07 | 2008-08-06 | 汪立平 | Constant throttle -type amortization structure high pressure oil cylinder |
| CN201170229Y (en) * | 2008-03-07 | 2008-12-24 | 汪立平 | Buffering high pressure oil cylinder |
| CN201412408Y (en) * | 2009-06-17 | 2010-02-24 | 江苏恒立高压油缸有限公司 | Floating type buffering hydro cylinder |
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| Publication number | Publication date |
|---|---|
| CN101598156A (en) | 2009-12-09 |
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Address after: 213169, Jiangsu, Changzhou province Wujin District snow weir industrial concentration area Patentee after: JIANGSU HENGLI HYDRAULIC CO., LTD. Address before: 213169, Jiangsu, Changzhou province Wujin District snow weir industrial concentration area Patentee before: Jiangsu Hengli High Pressure Oil Cylinder Co., Ltd. |