CN102518619A - Elastic buffering hydraulic cylinder - Google Patents
Elastic buffering hydraulic cylinder Download PDFInfo
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- CN102518619A CN102518619A CN2011104429826A CN201110442982A CN102518619A CN 102518619 A CN102518619 A CN 102518619A CN 2011104429826 A CN2011104429826 A CN 2011104429826A CN 201110442982 A CN201110442982 A CN 201110442982A CN 102518619 A CN102518619 A CN 102518619A
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- piston rod
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- fixed cover
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Abstract
The invention discloses an elastic buffering hydraulic cylinder, which comprises a piston rod, a cylinder body and a piston, wherein the piston rod has a hollow structure, and a gas cavity is formed in the piston rod; an oil cavity is formed in the cylinder body; high-pressure nitrogen is filled in the gas cavity, and hydraulic oil is filled in the oil cavity; the piston is arranged in the piston rod, and the gas cavity and the oil cavity are partitioned through the piston; an O-shaped sealing ring is arranged between the piston and the inner wall of the piston rod, and a connecting device is also arranged between the piston rod and the cylinder body; a fixed cover is arranged on the outer part of the cylinder body, and a cavity is formed in the fixed cover; a movable cover is arranged on the outer part of the piston rod, the movable cover is a metallic corrugated pipe device, a groove is formed in the cavity of the fixed cover, and the movable cover is embedded into the fixed cover through the groove; and a labyrinth passage is formed between the connecting device and the inner wall of the cylinder body, and a plurality of steel balls for separating the hydraulic oil from the gas are arranged in the labyrinth passage. The protective cover is arranged outside the elastic buffering hydraulic cylinder, and an internal medium is safe and leak-free, so that effective elastic buffering is produced in a compression travel.
Description
Technical field
The present invention relates to a kind of elastic buffer hydraulic jack, particularly a kind of hydraulic jack that plays buffer function and have protective equipment through high pressure nitrogen.
Background technique
Single piston hydraulic pressure oil cylinder of the prior art; The one end oil-feed one of piston two ends brings out oil, and conventional hydraulic jack often exists hydraulic oil to reveal being used in heavy hydraulic machinery for example when lifting jack, excavator, bulldozer, fork truck etc.; Safe effect is poor, the characteristics that buffer capacity is not enough.
Simultaneously, because traditional hydraulic jack exposes outside when operation basically, great majority do not possess protective housing; Therefore hydraulic jack especially piston rod construction can not get good protection; Easy collision of assorted dirt in the environment and foreign matter or entering hydraulic jack, thus wearing and tearing and destruction oil cylinder make that leakage is more serious; And reduce working life, increased rate of fault greatly.
Summary of the invention
The object of the invention is exactly for solving technical problems such as above-mentioned; A kind of hydraulic jack is provided, and it can effectively produce elastic buffer in compression stroke through air cavity and oil pocket are set; At the removable flexible protective equipment of piston rod outer installment, cylinder body and piston rod have effectively been protected simultaneously.
The present invention is that the technological scheme that solves the problems of the technologies described above employing is:
A kind of elastic buffer hydraulic jack comprises piston rod, cylinder body, piston, and sell at the bottom of being respectively equipped with preceding pin of oil cylinder and oil cylinder the oil cylinder front and back; Said piston rod is a hollow structure, and its inside is provided with air cavity, and said cylinder interior is provided with oil pocket; Be filled with high pressure nitrogen in the air cavity, be full of hydraulic oil in the oil pocket, piston is arranged on piston rod inside; Piston is separated air cavity and oil pocket in oil cylinder inside, is provided with the O RunddichtringO between piston and the piston rod inwall, also is provided with retaining head and connection set between piston rod and the cylinder body; The outside of said cylinder body is provided with fixed cover, and an end of said fixed cover is fixedly connected with cylinder body through fixed block in the position of corresponding connection set, and the other end of said fixed cover links to each other with pin at the bottom of the oil cylinder through fixing device, the inner cavity that forms of said fixed cover; Said piston rod outside is provided with active cover, and said active cover is a metal bellows, sells before one of which end and the oil cylinder to link to each other, and the other end stretches in the cavity of said fixed cover; Be provided with groove in the cavity of said fixed cover, said active cover connects through the embedding of groove phase in fixed cover;
Be provided with labyrinth channel between said connection set and the inboard wall of cylinder block, be provided with several steel balls in the labyrinth channel to separate hydraulic oil and gas, isolated gas is discharged through gas exhausting device; The outside of said cylinder body also is provided with pressure transducer, to monitor in-oil cylinder pressure.
Be respectively equipped with unidirectional gas charging valve and unidirectional liquid-filling valve to prevent high pressure nitrogen and hydraulic fluid leak at air cavity suction port and oil pocket filler opening.
The invention has the beneficial effects as follows: the present invention utilizes the compressible characteristics of gas, in compression stroke, produces elastic buffer, can cushion the ability that various reactions are impacted, and energy output is more stable.The present invention is provided with the Oil-gas Separation passage, guarantees that the gas of oil pocket can access separation timely and effectively, keeps best working state constantly.Hydraulic jack protective equipment of the present invention can prevent dust, and has the elastic buffer effect, and simple in structure, easy for installation, practical application effect is better.
Description of drawings
Fig. 1 is the structural representation of hydraulic jack of the present invention.
Fig. 2 is the enlarged view of the gas oil separation structure among Fig. 1.
Fig. 3 is the side view of Fig. 1.
Fig. 4 is the structural representation of the hydraulic jack of second mode of execution of the present invention.
Among the figure, 1-suction port, 2-piston rod, 3-air cavity, 4-piston, 5-connection set; The 6-cylinder body, 7-oil pocket, 8-filler opening, 9-labyrinth channel, 10 gas exhausting devices, 11-pressure transducer; The 12-steel ball, 13-keeps off head, 14-fixed block, 15-active cover, 16-fixed cover, 17-O RunddichtringO
Embodiment
Below in conjunction with accompanying drawing the present invention is done detailed explanation.
What Fig. 1-3 described is the first embodiment of the present invention.
At first referring to figs. 1 to Fig. 2, Fig. 1 is the structural representation of hydraulic jack of the present invention.Piston rod 2 is installed in the cylinder body 6, and cylinder body 6 inside are provided with oil pocket 7, and piston rod is a hollow structure; In be provided with air cavity 3; Be provided with piston 4 in the air cavity 3, piston 4 separates air cavity 3 and oil pocket 7, is provided with the suction port 1 of pressurized gas in the air cavity 3; Be provided with the filler opening 8 of hydraulic oil in the oil pocket 7, cylinder body is provided with pressure transducer 11 to detect the oil cylinder internal pressure.Realize Oil-gas Separation being provided with O RunddichtringO 17 between piston and the piston rod through piston between the cylinder body, be connected with connection set 5 through keeping off 13 between the inwall of piston rod 2 and cylinder body 6, connection set 5 is provided with labyrinth channel.
Being in the cylinder during original state does not have pressure status, and this moment, piston rod 2 stretched out fully.Earlier air cavity 3 is filled the gas of certain pressure; Block up with the suction port of unidirectional gas charging valve with air cavity 3, the oil pocket in cylinder body 67 is full of hydraulic oil through filler opening 8 then, and charge pressure equates with air pressure; Make piston 4 be in the neutral position, filler opening is blocked with one-way valve.Use unidirectional gas charging valve and unidirectional liquid-filling valve can prevent gas and hydraulic fluid leak.During work, external force P (direction of external force P is the direction from direction to the piston rod of cylinder body, promptly among Fig. 1 from the right side to the left direction; Not shown among Fig. 1) effect under, cylinder body 6 advances inwards, the pressure of oil pocket 7 raises and promotes piston 4 to air cavity 3 motions; Along with dwindling of air cavity 3 volumes; Pressurized gas is made that by constantly compression the pressure in the air cavity 3 constantly increases, thereby produces elastic buffer.Because the volume of air cavity 3 is greater than the volume of oil pocket 7, when oil cylinder is in full reduced state, when promptly hydraulic oil all gets into air cavity 3, can not make the explosion of air cavity inwall because gas compression pressure raises yet.
Although be provided with the O RunddichtringO between piston rod and the piston; But still inevitably can bring gas that comes and a spot of gas that in compression process, produces in the process into because the leakage of pressurized gas and hydraulic oil are charging in above-mentioned working procedure; If the untimely discharge of this part gas; Will certainly cause hydraulic fluid pressure to reduce, working end pressure descends and causes working efficiency to reduce.Therefore; The present invention is provided with labyrinth channel between connection set 5 and inboard wall of cylinder block; With reference to figure 3, be provided with several steel balls in the labyrinth channel, the purpose that steel ball is set be stop hydraulic oil through in gas separation is gone out; Through after several labyrinth channels, gas is discharged through gas exhausting device 10.Special, gas exhausting device 10 is discharged one-way valve for air.
With reference to figure 1 and Fig. 3; Further described the concrete structure of the safety cover of piston rod and cylinder body, cylinder body 6, piston rod 2, fixed cover 16, the parallel mutually connection of active cover 15, wherein; Fixed cover 16 is mainly used in protection cylinder body 6, and active cover 15 is mainly used in protection piston rod 2.Link to each other through fixing bolt between fixed cover 16 and the fixed block 14, be fastenedly connected with cylinder body 6, fixed cover 16 inside are cavity; The side that fixed cover 16 links to each other with fixed block 14 is coated on the cylinder body 6 fully, in fixed cover 16 cavitys trench structure is arranged, and sells before an end of active cover 15 and the oil cylinder to link to each other; With with piston rod 2 associated movements; The other end stretches in the cavity of fixed cover 16, embeds the groove in fixed cover 16 cavitys, stablizes its motion state with this.Fixed cover of the present invention and active cover all adopt metal material.
With reference to figure 4, it is the second embodiment of the present invention, and what they were different with first embodiment is, it uses hydraulic jack for hoist, and pressurized gas is a high pressure nitrogen, and high pressure nitrogen stability is better, and its elastic buffer ability in compression process is stronger; Simultaneously, in order to adapt to the elastic buffer effect of high pressure nitrogen, active cover 15 adopts the wavy metal pipe arrangement.Himself possesses deformability, can in fixed cover, shrink simultaneously.
Though the above-mentioned accompanying drawing specific embodiments of the invention that combines is described; But be not restriction to protection domain of the present invention; One of ordinary skill in the art should be understood that; On the basis of technological scheme of the present invention, those skilled in the art need not pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (2)
1. an elastic buffer hydraulic jack comprises piston rod, cylinder body, piston, and sell at the bottom of being respectively equipped with preceding pin of oil cylinder and oil cylinder the oil cylinder front and back; Said piston rod is a hollow structure, and its inside is provided with air cavity, and said cylinder interior is provided with oil pocket; Be filled with high pressure nitrogen in the air cavity; Be full of hydraulic oil in the oil pocket, piston is arranged on piston rod inside, and piston is separated air cavity and oil pocket in oil cylinder inside; Be provided with the O RunddichtringO between piston and the piston rod inwall, also be provided with retaining head and connection set between piston rod and the cylinder body; The outside of said cylinder body is provided with fixed cover, and an end of said fixed cover is fixedly connected with cylinder body through fixed block in the position of corresponding connection set, and the other end of said fixed cover links to each other with pin at the bottom of the oil cylinder through fixing device, the inner cavity that forms of said fixed cover; Said piston rod outside is provided with active cover, and said active cover is a metal bellows, sells before one of which end and the oil cylinder to link to each other, and the other end stretches in the cavity of said fixed cover; Be provided with groove in the cavity of said fixed cover, said active cover connects through the embedding of groove phase in fixed cover.
It is characterized in that, be provided with labyrinth channel between said connection set and the inboard wall of cylinder block, be provided with several steel balls in the labyrinth channel to separate hydraulic oil and gas, isolated gas is discharged through gas exhausting device; The outside of said cylinder body also is provided with pressure transducer, to monitor in-oil cylinder pressure.
2. elastic buffer hydraulic jack according to claim 1 is characterized in that, is respectively equipped with unidirectional gas charging valve and unidirectional liquid-filling valve to prevent high pressure nitrogen and hydraulic fluid leak at air cavity suction port and oil pocket filler opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104429826A CN102518619A (en) | 2011-12-27 | 2011-12-27 | Elastic buffering hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104429826A CN102518619A (en) | 2011-12-27 | 2011-12-27 | Elastic buffering hydraulic cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN102518619A true CN102518619A (en) | 2012-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104429826A Pending CN102518619A (en) | 2011-12-27 | 2011-12-27 | Elastic buffering hydraulic cylinder |
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| Country | Link |
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| CN (1) | CN102518619A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075383A (en) * | 2013-02-04 | 2013-05-01 | 龚炳新 | Novel cylinder and transmission mechanism thereof |
| CN104196817A (en) * | 2014-09-02 | 2014-12-10 | 徐州徐工液压件有限公司 | Oil-gas two-medium damping hydraulic cylinder |
| WO2016127777A1 (en) * | 2015-02-13 | 2016-08-18 | 樊硕 | Nitrogen energy storage hydraulic cylinder |
| CN107676331A (en) * | 2017-10-31 | 2018-02-09 | 重庆维庆液压机械有限公司 | A kind of hydraulic jack for being used to discharge |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2564627Y (en) * | 2002-08-21 | 2003-08-06 | 王和 | Protective cover for oil tank |
| CN1834528A (en) * | 2006-03-27 | 2006-09-20 | 博奥生物有限公司 | Flow structure of controlling liquid continuously flowing in micro-pipeline |
| CN2835699Y (en) * | 2004-10-22 | 2006-11-08 | 大连万春聚氨酯护舷科技发展有限公司 | Hydro-pneumatic buffer |
| CN201916410U (en) * | 2011-01-07 | 2011-08-03 | 常州气弹簧有限公司 | Lockable-casing gas spring |
-
2011
- 2011-12-27 CN CN2011104429826A patent/CN102518619A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2564627Y (en) * | 2002-08-21 | 2003-08-06 | 王和 | Protective cover for oil tank |
| CN2835699Y (en) * | 2004-10-22 | 2006-11-08 | 大连万春聚氨酯护舷科技发展有限公司 | Hydro-pneumatic buffer |
| CN1834528A (en) * | 2006-03-27 | 2006-09-20 | 博奥生物有限公司 | Flow structure of controlling liquid continuously flowing in micro-pipeline |
| CN201916410U (en) * | 2011-01-07 | 2011-08-03 | 常州气弹簧有限公司 | Lockable-casing gas spring |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075383A (en) * | 2013-02-04 | 2013-05-01 | 龚炳新 | Novel cylinder and transmission mechanism thereof |
| CN104196817A (en) * | 2014-09-02 | 2014-12-10 | 徐州徐工液压件有限公司 | Oil-gas two-medium damping hydraulic cylinder |
| WO2016127777A1 (en) * | 2015-02-13 | 2016-08-18 | 樊硕 | Nitrogen energy storage hydraulic cylinder |
| CN107676331A (en) * | 2017-10-31 | 2018-02-09 | 重庆维庆液压机械有限公司 | A kind of hydraulic jack for being used to discharge |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120627 |