CN102242746B - Hydraulic push rod device - Google Patents
Hydraulic push rod device Download PDFInfo
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- CN102242746B CN102242746B CN2011101562642A CN201110156264A CN102242746B CN 102242746 B CN102242746 B CN 102242746B CN 2011101562642 A CN2011101562642 A CN 2011101562642A CN 201110156264 A CN201110156264 A CN 201110156264A CN 102242746 B CN102242746 B CN 102242746B
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- oil pocket
- piston rod
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- cylinder body
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Abstract
The invention relates to a hydraulic push rod device. An outer cylinder body, an outer guide sleeve, an outer piston rod, an outer piston and an outer rear end cover form a conventional hydraulic push rod device; the outer piston rod has a hollow structure, an inner rear end cover is arranged at the rear end of the outer piston rod, an inner piston rod is arranged in the outer piston rod, and two ends of the inner piston rod are hermetically connected with the outer piston rod through an inner guide sleeve and an inner piston respectively; an inner front oil cavity is formed among the inner guide sleeve, the inner piston rod, the inner piston and the outer piston rod; an inner rear oil cavity is formed among the inner piston rod, the inner piston, the inner rear end cover and the outer piston rod; and the outer piston rod is provided with an inner front oil cavity hole, the inner front oil cavity hole is communicated with the inner front oil cavity, the outer piston rod is provided with an inner rear oil cavity hole, and the inner rear oil cavity hole is communicated with the inner rear oil cavity. The invention provides the hydraulic push rod device capable of enlarging the stroke of the piston rods in a limited use space.
Description
Technical field
The present invention relates to a kind of hydraulic push rod device.
Background technique
The structure of present employed hydraulic push rod device is: comprise outer cylinder body; The front end of outer cylinder body is connected with fixed plate through outer bush; The rear end of outer cylinder body is connected with outer rear end cover, is provided with the outer piston bar in the outer cylinder body, and the two ends of outer piston bar are tightly connected through outer bush and outer piston and outer cylinder body respectively; Form outer preceding oil pocket between outer bush, outer piston bar, outer piston and the outer cylinder body; Back oil pocket outside forming between outer piston bar, outer piston, outer rear end cover and the outer cylinder body, preceding oil pocket oilhole outside outer cylinder body is provided with, outer preceding oil pocket oilhole is connected with outer preceding oil pocket; Outer rear end cover is provided with outer back oil pocket oilhole, and outer back oil pocket oilhole is connected with outer back oil pocket.
The working principle of present employed hydraulic push rod device is: hydraulic oil is the oil-feed of oil pocket oilhole from the back, makes oil pressure increase in the oil pocket of back, and oil pressure promotes piston and piston rod moves forward, and the hydraulic oil before this moment in the oil pocket is discharged in the oil pocket oilhole in the past; Otherwise, hydraulic oil oil pocket oilhole oil-feed in the past, oil pressure increase in the oil pocket before making, oil pressure promotes piston and piston rod moves backward, and the hydraulic oil in the oil pocket of back is discharged from the oil pocket oilhole of back at this moment.
The shortcoming of present employed hydraulic push rod device is: because the restriction of space, field of employment size; The length of whole hydraulic push rod device is restricted; Thereby limited the length of piston rod, promptly limited the stroke of piston rod, make whole hydraulic push rod device can pusher length obtain restriction.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of in limited usage space, can increase the hydraulic push rod device of the stroke of piston rod.
For addressing the above problem, the technological scheme that the present invention adopts is: the hydraulic push rod device comprises outer cylinder body; The front end of outer cylinder body is connected with fixed plate through outer bush, and the rear end of outer cylinder body is connected with outer rear end cover, is provided with the outer piston bar in the outer cylinder body; The two ends of outer piston bar are tightly connected through outer bush and outer piston and outer cylinder body respectively, form between outer bush, outer piston bar, outer piston and the outer cylinder body outer before oil pocket, form outer back oil pocket between outer piston bar, outer piston, outer rear end cover and the outer cylinder body; Oil pocket oilhole before outside outer cylinder body is provided with, outer preceding oil pocket oilhole is connected with outer preceding oil pocket, and outer rear end cover is provided with outer back oil pocket oilhole; Outer back oil pocket oilhole is connected with outer back oil pocket, and said outer piston bar is a hollow structure, and the rear end of outer piston bar is provided with interior rear end cover; Be provided with inner piston rod in the outer piston bar; The two ends of inner piston rod are connected with the outer piston rod seal with inner carrier through interior guide pin bushing respectively, preceding oil pocket in forming between interior guide pin bushing, inner piston rod, inner carrier and the outer piston bar, back oil pocket in forming between inner piston rod, inner carrier, interior rear end cover and the outer piston bar; Oil pocket oilhole before in the outer piston bar is provided with; In before the oil pocket oilhole with interior before oil pocket be connected, back oil pocket oilhole in having after being provided with on the outer piston bar, interior back oil pocket oilhole with interior after oil pocket be connected.
The invention has the beneficial effects as follows: above-mentioned hydraulic push rod device, simple in structure, easy to use.But its inside and outside piston rod linkage is single movement also; And cooperation through inside and outside piston rod; Can make the hydraulic push rod device in limited usage space; The stroke of piston rod increases to original twice, make whole hydraulic push rod device can pusher length get a promotion, enlarged the employable scope of hydraulic push rod device.
Description of drawings
Fig. 1 is the sectional structure schematic representation of hydraulic push rod device of the present invention;
Fig. 2 is the structure for amplifying schematic representation of A portion among Fig. 1;
Among the figure: 1, outer cylinder body, 2, outer bush, 3, fixed plate, 4, outer rear end cover, 5, the outer piston bar; 6, outer piston, 7, outer before oil pocket, 8, outer back oil pocket, 9, outer before the oil pocket oilhole, 10, outer back oil pocket oilhole; 11, interior rear end cover, 12, inner piston rod, 13, interior guide pin bushing, 14, inner carrier; 15, oil pocket before interior, 16, interior back oil pocket, 17, interior before the oil pocket oilhole, 18, interior back oil pocket oilhole.
Embodiment
Through specific embodiment hydraulic push rod device of the present invention is done further to describe in detail below.
Like Fig. 1, shown in Figure 2, the hydraulic push rod device comprises outer cylinder body 1; The front end of outer cylinder body 1 is connected with fixed plate 3 through outer bush 2, and the rear end of outer cylinder body 1 is connected with outer rear end cover 4, is provided with outer piston bar 5 in the outer cylinder body 1; The two ends of outer piston bar 5 are tightly connected through outer bush 2 and outer piston 6 and outer cylinder body 1 respectively, form outer preceding oil pocket 7 between outer bush 2, outer piston bar 5, outer piston 6 and the outer cylinder body 1, form outer back oil pocket 8 between outer piston bar 5, outer piston 6, outer rear end cover 4 and the outer cylinder body 1; Outer cylinder body 1 is provided with outer preceding oil pocket oilhole 9; Before outer oil pocket oilhole 9 with outer before oil pocket 7 be connected, outer rear end cover 4 is provided with outer back oil pocket oilhole 10, outer back oil pocket oilhole 10 with outward after oil pocket 8 be connected; Said outer piston bar 5 is a hollow structure; The rear end of outer piston bar 5 is provided with interior rear end cover 11, is provided with inner piston rod 12 in the outer piston bar 5, and the two ends of inner piston rod 12 are tightly connected through interior guide pin bushing 13 and inner carrier 14 and outer piston bar 5 respectively; Oil pocket 15 before in forming between interior guide pin bushing 13, inner piston rod 12, inner carrier 14 and the outer piston bar 5; The interior back of formation oil pocket 16 between inner piston rod 12, inner carrier 14, interior rear end cover 11 and the outer piston bar 5, preceding oil pocket oilhole 17 in outer piston bar 5 is provided with, interior preceding oil pocket oilhole 17 is connected with interior preceding oil pocket 15; Back oil pocket oilhole 18 in having after being provided with on the outer piston bar 5, interior back oil pocket oilhole 18 is connected with interior back oil pocket 16.
Working principle of the present invention is: but its inner piston rod 12 and outer piston bar 5 linkages also single movement.Wherein during outer piston bar 5 action: hydraulic oil is from oil pocket oilhole 10 oil-feeds of outer back, makes that oil pressure increases in the oil pocket 8 of outer back, and oil pressure promotes outer piston 6 and outer piston bar 5 move forward, the discharge from outer preceding oil pocket oilhole 9 of the hydraulic oil before this moment is outer in the oil pocket 7; Otherwise, hydraulic oil from outside before 9 oil-feeds of oil pocket oilhole, make outer before in the oil pocket 7 oil pressure increase, oil pressure promotes outer piston 6 and outer piston bar 5 move backward, the hydraulic oil discharge from the oil pocket oilhole 10 of outer back in this moment outer back oil pocket 8.
During inner piston rod 12 actions: hydraulic oil makes oil pressure increase in the oil pocket 16 of interior back from oil pocket oilhole 18 oil-feeds of interior back, and oil pressure promotes inner carrier 14 and inner piston rod 12 moves forward, and the hydraulic oil before this moment is interior in the oil pocket 15 is discharged from interior preceding oil pocket oilhole 17; Otherwise, hydraulic oil oil pocket oilhole 17 oil-feeds before interior, in making before in the oil pocket 15 oil pressure increase, oil pressure promotes inner carrier 14 and inner piston rod 12 move backward, the discharge from the oil pocket oilhole 18 of interior back of the hydraulic oil in this moment in the oil pocket 16 of back.
The above embodiments are the principle and the effect thereof of illustrative the invention only, and the embodiment of part utilization, but not is used to limit the present invention; Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the invention design, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (1)
1. the hydraulic push rod device comprises outer cylinder body, and the front end of outer cylinder body is connected with fixed plate through outer bush; The rear end of outer cylinder body is connected with outer rear end cover, is provided with the outer piston bar in the outer cylinder body, and the two ends of outer piston bar are tightly connected through outer bush and outer piston and outer cylinder body respectively; Form outer preceding oil pocket between outer bush, outer piston bar, outer piston and the outer cylinder body, form outer back oil pocket between outer piston bar, outer piston, outer rear end cover and the outer cylinder body, outer cylinder body is provided with outer preceding oil pocket oilhole; Before outer the oil pocket oilhole with outer before oil pocket be connected, outer rear end cover is provided with outer back oil pocket oilhole, outer back oil pocket oilhole with outward after oil pocket be connected; It is characterized in that: said outer piston bar is a hollow structure; The rear end of outer piston bar is provided with interior rear end cover, is provided with inner piston rod in the outer piston bar, and the two ends of inner piston rod are connected with the outer piston rod seal with inner carrier through interior guide pin bushing respectively; Oil pocket before in forming between interior guide pin bushing, inner piston rod, inner carrier and the outer piston bar; The interior back of formation oil pocket between inner piston rod, inner carrier, interior rear end cover and the outer piston bar, preceding oil pocket oilhole in the outer piston bar is provided with, interior preceding oil pocket oilhole is connected with interior preceding oil pocket; Back oil pocket oilhole in the outer piston bar is provided with, interior back oil pocket oilhole is connected with interior back oil pocket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101562642A CN102242746B (en) | 2011-06-12 | 2011-06-12 | Hydraulic push rod device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101562642A CN102242746B (en) | 2011-06-12 | 2011-06-12 | Hydraulic push rod device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102242746A CN102242746A (en) | 2011-11-16 |
| CN102242746B true CN102242746B (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101562642A Active CN102242746B (en) | 2011-06-12 | 2011-06-12 | Hydraulic push rod device |
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| CN (1) | CN102242746B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485086A (en) * | 2016-01-14 | 2016-04-13 | 徐州奥博机械科技有限公司 | Multi-cavity fast hydraulic oil cylinder |
| CN107745064A (en) * | 2017-11-08 | 2018-03-02 | 南通合强液压科技有限公司 | A kind of oil cylinder of New Ring-like Type hot forging punching |
| CN111536187B (en) * | 2020-05-11 | 2022-04-08 | 中航飞机起落架有限责任公司 | Valve body assembly and damping valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2301580Y (en) * | 1997-05-19 | 1998-12-23 | 王绍裘 | Electric hydraulic push rod |
| JP3796639B2 (en) * | 1997-09-19 | 2006-07-12 | Ｓｍｃ株式会社 | Fluid pressure cylinder |
| CN101900149A (en) * | 2010-07-30 | 2010-12-01 | 贾广生 | Novel hydraulic cylinder and manufacturing method thereof |
| CN202158029U (en) * | 2011-06-12 | 2012-03-07 | 江苏维达机械有限公司 | Hydraulic push rod device |
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| CN102242746A (en) | 2011-11-16 |
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