CN106678122B - A kind of primary and secondary differential hydro cylinder - Google Patents
A kind of primary and secondary differential hydro cylinder Download PDFInfo
- Publication number
- CN106678122B CN106678122B CN201710089905.4A CN201710089905A CN106678122B CN 106678122 B CN106678122 B CN 106678122B CN 201710089905 A CN201710089905 A CN 201710089905A CN 106678122 B CN106678122 B CN 106678122B
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- small
- big
- piston rod
- cylinder
- cylinder body
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/17—Characterised by the construction of the motor unit of the straight-cylinder type of differential-piston type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention discloses a kind of primary and secondary differential hydro cylinder, including big cylinder body and the big piston rod coordinated with big cylinder body and big piston, small cylinder body and the small piston rod and valve piston that coordinate with small cylinder body；The small cylinder body is plugged in the big piston rod, and the small piston rod with the stroke directions of the big piston rod on the contrary, the small piston rod is fixedly connected with the big cylinder body.Structure of the present invention is relatively simple, and making price is low, and maintenance cost is low, have effectively achieved small flow high thrust, has saved production cost, reduced energy consumption, added economic benefit.
Description
Technical field
The present invention relates to hydraulic cylinder field, relates in particular to a kind of primary and secondary differential hydro cylinder.
Background technology
Hydraulic cylinder, is that hydraulic energy is changed into mechanical energy, does the hydraulic pressure execution of straight reciprocating motion (or oscillating motion)
Element.Its simple in structure, reliable operation.During with it to realize reciprocating motion, deceleration device can be removed from, and without between transmission
Gap, stable movement, therefore be used widely in various mechanical hydraulic systems.
Current era, energy conservation and environmental protection have become the theme of development in science and technology, and Hydraulic Industry is also such.General high thrust hydraulic pressure
Cylinder just needs larger size, so necessarily results in the need for the hydraulic power source of a high-pressure high-flow.Must using this hydraulic power source
High-power motor is so needed, which results in the waste of the energy.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of primary and secondary differential hydro cylinder that can realize small flow high thrust.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that：A kind of primary and secondary differential hydro cylinder, including it is big
Cylinder body and the big piston rod coordinated with big cylinder body and big piston, small cylinder body and the small piston rod coordinated with small cylinder body and small work
Plug；
The small cylinder body is plugged in the big piston rod, and the stroke directions of the small piston rod and the big piston rod
On the contrary, the small piston rod is fixedly connected with the big cylinder body.
Further, the small piston rod is equipped with the first hydraulic pressure for being used for the rodless cavity that hydraulic oil enters the small cylinder body
Oily passage.
Further, the small piston rod is equipped with the second hydraulic pressure for being used for the rod chamber that hydraulic oil enters the small cylinder body
Oily passage.
Further, oil pipe is equipped with the small piston rod, one end of the oil pipe is stretched from the rear end of the small piston rod
Go out, the big cylinder body is stretched out in the front end of the small piston rod, and the front end of the small piston rod is equipped with another with the oil pipe
The first fuel feed hole of connection is held, the first hydraulic oil channel is formed with this.
Further, cavity is equipped with the small piston rod, the big cylinder body, and institute are stretched out in the front end of the small piston rod
The front end for stating small piston rod is equipped with the second fuel feed hole connected with the cavity, and the small piston rod, which is equipped with, connects the cavity
With the oil-through hole of the rod chamber of small cylinder body, the second hydraulic oil channel is formed with this.
Further, the big cylinder body, which is equipped with, is used for the first repairing hole that hydraulic oil enters its rodless cavity.
Further, the big cylinder body, which is equipped with, is used for the second repairing hole that hydraulic oil enters its rod chamber.
Further, the big cylinder body include big cylinder barrel, be connected to big cylinder barrel front end big cylinder sleeve and be connected to big
The big cylinder bottom of the rear end of cylinder barrel.
Further, the small cylinder body include small cylinder barrel, be connected to small cylinder barrel front end small cylinder sleeve and be connected to small
The small cylinder bottom of the rear end of cylinder barrel.
Beneficial effects of the present invention are：
The present invention is at work, on the one hand, hydraulic oil acts on big piston by the rodless cavity of big cylinder body, so as to promote big
Piston rod, on the other hand, hydraulic oil acts on valve piston by the rodless cavity of small cylinder body, since small piston rod is stationarily connected to
On big cylinder body, therefore small cylinder body counter motion will be promoted, and due to the stroke directions of small piston rod and big piston rod on the contrary, because
This small cylinder body is identical with the stroke directions of big piston rod, and small cylinder body is plugged in big piston rod, therefore small cylinder body will
Carry big piston rod movement, that is to say, that there are this hydraulic cylinder two sets of active forces to act on big piston rod, compared to existing hydraulic pressure
Cylinder, it is not necessary to which the hydraulic power source of high-pressure high-flow can be achieved with compared with high thrust.
In addition, structure of the present invention is relatively simple, making price is low, and maintenance cost is low, have effectively achieved small flow and pushes away greatly
Power, has saved production cost, reduces energy consumption, adds economic benefit.
Brief description of the drawings
Fig. 1 is the structure diagram of one embodiment of the invention.
In attached drawing the mark of each component for：11 big cylinder barrels, 12 big cylinder sleeves, 121 second repairing holes, 122 second high pressure oil holes,
13 big cylinder bottoms, 131 first repairing holes, 132 first high pressure oil holes, 2 big piston rods, 3 big pistons, 41 small cylinder barrels, 42 small cylinder sleeves, 43
Small cylinder bottom, 431 pits, 432 through holes, 5 small piston rods, 51 first fuel feed holes, 52 second fuel feed holes, 53 cavitys, 54 oil-through holes, 6
Valve piston, 7 oil pipes.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings：It should be noted that in the case where there is no conflict, the application
In embodiment and embodiment in feature can be mutually combined.Describe this in detail below with reference to the accompanying drawings and in conjunction with the embodiments
Invention.
Referring to Fig. 1.
Front-end and back-end as described below, for being the stroke directions with respective piston.
The primary and secondary differential hydro cylinder of one embodiment of the invention, including big cylinder body and the big piston rod 2 with the cooperation of big cylinder body
The small piston rod 5 and valve piston 6 coordinated with big piston 3, small cylinder body and with small cylinder body；
The small cylinder body is plugged in the big piston rod 2, and the stroke of the small piston rod 5 and the big piston rod 2
Direction is on the contrary, the small piston rod 5 is fixedly connected with the big cylinder body.
This hydraulic cylinder is at work, on the one hand, hydraulic oil acts on big piston by the rodless cavity of big cylinder body, so as to promote
Big piston rod, on the other hand, hydraulic oil acts on valve piston by the rodless cavity of small cylinder body, since small piston rod is to be fixedly connected
On big cylinder body, therefore small cylinder body counter motion will be promoted, and due to small piston rod and big piston rod stroke directions on the contrary,
Therefore small cylinder body is identical with the stroke directions of big piston rod, and small cylinder body is plugged in big piston rod, therefore small cylinder body will
Big piston rod movement can be carried, that is to say, that there are this hydraulic cylinder two sets of active forces to act on big piston rod, compared to existing liquid
Cylinder pressure, it is not necessary to which the hydraulic power source of high-pressure high-flow can be achieved with compared with high thrust.
Exemplified with a kind of common structure of big cylinder body in figure, including big cylinder barrel 11, be connected to big cylinder barrel 11 front end it is big
Cylinder sleeve 12 and be connected to big cylinder barrel 11 rear end big cylinder bottom 13.In specific implementation, big cylinder sleeve and big cylinder bottom pass through locking screw
Nail is connected on big cylinder barrel；Big piston is connected to by way of screw thread or welding on big piston rod.
Exemplified with a kind of common structure of small cylinder body in figure, including small cylinder barrel 41, be connected to small cylinder barrel 41 front end it is small
Cylinder sleeve 42 and be connected to small cylinder barrel 41 rear end small cylinder bottom 43.In specific implementation, small cylinder sleeve passes through locking screw with big piston
Nail connection, small cylinder sleeve are connected by screw thread with small cylinder barrel so that small cylinder barrel, small cylinder sleeve, big piston, big piston rod are assembled into whole
Body.Certainly, its medium and small cylinder barrel and small cylinder bottom can also be integrated formed structure parts with big piston rod.
In one embodiment, the small piston rod 5, which is equipped with, is used for the of the rodless cavity that hydraulic oil enters the small cylinder body
One hydraulic oil channel and the second hydraulic oil channel for hydraulic oil into the rod chamber of the small cylinder body, facilitate hydraulic oil to enter
Acted in respective chamber.
In one embodiment, it is equipped with oil pipe 7 in the small piston rod 5, one end of the oil pipe 7 is from the small piston rod 5
Rear end stretch out, the big cylinder body is stretched out in the front end of the small piston rod 5, and the front end of the small piston rod 5 be equipped with it is described
First fuel feed hole 51 of the other end connection of oil pipe 7, the first hydraulic oil channel is formed with this；Sky is equipped with the small piston rod 5
Chamber 53, the front end of the small piston rod 5 are equipped with the second fuel feed hole 52 connected with the cavity 53, are set on the small piston rod 5
There is the oil-through hole 54 for the rod chamber for connecting the cavity 53 and small cylinder body, the second hydraulic oil channel is formed with this.So design, knot
Structure is simple, and design is reasonable, and easily sealing, effect are reliable.
In one embodiment, small piston rod and oil pipe are welded into entirety, and the front end of small piston rod is connected by screw
On big cylinder bottom, the rear end of small piston rod is connected by screw thread with valve piston；The front end of small cylinder bottom stretch into small cylinder barrel and with small cylinder
Gap is left between the inner wall of cylinder, the front end face of small cylinder bottom is provided with a pit 431, and the front end of small cylinder bottom, which is equipped with, connects the pit
The through hole 432 in the gap between 431 and the front end of small cylinder barrel and small cylinder bottom so that when stroke starts, hydraulic oil enters small cylinder
The rodless cavity of body；The front end of small piston rod is small head, and the first fuel feed hole 51 and the second fuel feed hole 52 are arranged in small head, small bar
Head is connected with the back segment of small piston rod by welding.
In one embodiment, the big cylinder body, which is equipped with, is used for the first repairing hole 131 that hydraulic oil enters its rodless cavity.
In work, suction function is formed because big piston rod is mobile, the hydraulic oil in fuel tank will enter big living by the first repairing hole 131
Plug forms to obtain cavity, namely the rodless cavity of big cylinder body with big cylinder bottom.In specific implementation, the first repairing hole 131 can be opened in large cylinder
On bottom.
In one embodiment, the big cylinder body, which is equipped with, is used for the second repairing hole 121 that hydraulic oil enters its rod chamber.
During big piston rod backhaul, suction function is formed because big piston rod is mobile, the hydraulic oil in fuel tank will pass through the second repairing hole 121
Cavity, namely the rod chamber of big cylinder body are formed to obtain into big piston and big cylinder sleeve.In specific implementation, the second repairing hole 121 can
Large cylinder is opened in put on.
In one embodiment, the big cylinder body, which is equipped with, is used for the first high pressure oil hole 132 that pressure oil enters its rodless cavity.
In specific implementation, the first high pressure oil hole 132 can be opened on big cylinder bottom.
In one embodiment, the big cylinder body, which is equipped with, is used for the second high pressure oil hole 122 that pressure oil enters its rod chamber.
In specific implementation, the second high pressure oil hole 122 can be opened in large cylinder and put on.
This hydraulic cylinder at work, when loading relatively low, pressure oil from the first fuel feed hole enter valve piston and small cylinder bottom it
Between gap, namely the rodless cavity of small cylinder body promotes big piston rod, at the same time due to suction function, the hydraulic pressure in fuel tank
Oil will be entered big piston by the first repairing hole and form to obtain cavity, namely the rodless cavity of big cylinder body with big cylinder bottom.When need compared with
During big pressure, pressure oil just enters big piston and big cylinder bottom by the first high pressure oil hole and forms to obtain cavity, thus with small cylinder barrel
Interior high pressure oil promotes big piston rod together；
During big piston rod backhaul, when loading relatively low, pressure oil enters the rod chamber of small cylinder body from the second fuel feed hole, will be big
Piston rod back promotes, and at the same time due to suction function, the hydraulic oil in fuel tank will enter big piston by the second repairing hole
Cavity is formed to obtain with big cylinder sleeve.When needing larger pulling force, pressure oil just by the second high pressure oil hole enter big piston with it is big
Cylinder sleeve forms to obtain cavity, so as to promote big piston rod backhaul together with the high pressure oil in small cylinder barrel.
In the present invention, have at each component contact position equipped with seal, except weldment.
It should be understood that example as described herein and embodiment are not intended to limit the invention, this area only for explanation
Technical staff can make various modifications or change according to it, within the spirit and principles of the invention, any modification for being made,
Equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (6)
- A kind of 1. primary and secondary differential hydro cylinder, it is characterised in that：Including big cylinder body and with big cylinder body coordinate big piston rod (2) and Big piston (3), small cylinder body and the small piston rod (5) and valve piston (6) that coordinate with small cylinder body；The small cylinder body is plugged in the big piston rod (2), and the small piston rod (5) and the row of the big piston rod (2) Cheng Fangxiang is on the contrary, the small piston rod (5) is fixedly connected with the big cylinder body；The small cylinder body includes small cylinder barrel (41) and is connected to the small cylinder bottom (43) of the rear end of small cylinder barrel (41)；The front end of the small cylinder bottom (43) is stretched into small cylinder barrel (41) and leaves gap between the inner wall of small cylinder barrel (41), described The front end face of small cylinder bottom (43) is provided with a pit (431), the front end of the small cylinder bottom (43) be additionally provided with connect the pit (431) and The through hole (432) in the gap between the front end of small cylinder barrel (41) and small cylinder bottom (43), the small piston rod (5) is interior to be equipped with oil pipe (7), one end of the oil pipe (7) is stretched out from the rear end of the small piston rod (5), when stroke starts, one end of the oil pipe (7) Stretch into pit (431).
- 2. primary and secondary differential hydro cylinder as claimed in claim 1, it is characterised in that：The small piston rod (5), which is equipped with, is used for liquid Pressure oil enters the first hydraulic oil channel of the rodless cavity of the small cylinder body.
- 3. primary and secondary differential hydro cylinder as claimed in claim 1 or 2, it is characterised in that：The small piston rod (5), which is equipped with, to be used for Hydraulic oil enters the second hydraulic oil channel of the rod chamber of the small cylinder body.
- 4. primary and secondary differential hydro cylinder as claimed in claim 1 or 2, it is characterised in that：The big cylinder body, which is equipped with, is used for hydraulic pressure Oil enters the first repairing hole (131) of its rodless cavity.
- 5. primary and secondary differential hydro cylinder as claimed in claim 1 or 2, it is characterised in that：The big cylinder body, which is equipped with, is used for hydraulic pressure Oil enters the second repairing hole (121) of its rod chamber.
- 6. primary and secondary differential hydro cylinder as claimed in claim 1 or 2, it is characterised in that：The big cylinder body include big cylinder barrel (11), The big cylinder sleeve (12) for being connected to the front end of big cylinder barrel (11) and the big cylinder bottom (13) for the rear end for being connected to big cylinder barrel (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710089905.4A CN106678122B (en) | 2017-02-20 | 2017-02-20 | A kind of primary and secondary differential hydro cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710089905.4A CN106678122B (en) | 2017-02-20 | 2017-02-20 | A kind of primary and secondary differential hydro cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106678122A CN106678122A (en) | 2017-05-17 |
| CN106678122B true CN106678122B (en) | 2018-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710089905.4A Active CN106678122B (en) | 2017-02-20 | 2017-02-20 | A kind of primary and secondary differential hydro cylinder |
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| CN (1) | CN106678122B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641271B (en) * | 2015-10-28 | 2018-08-07 | 南京凯盛国际工程有限公司 | The movable sealing structure of multiple degrees of freedom slide bar |
| CN107939773A (en) * | 2017-12-07 | 2018-04-20 | 中煤张家口煤矿机械有限责任公司 | A kind of high thrust is compound singly to stretch hydraulic cylinder |
| CN108637153B (en) * | 2018-05-29 | 2019-08-30 | 华中科技大学 | A kind of free-forging hydraulic and its control method |
| CN108425911B (en) * | 2018-05-29 | 2019-09-06 | 华中科技大学 | A kind of cylinder moving type composite hydraulic cylinder |
| CN115321409A (en) * | 2022-09-12 | 2022-11-11 | 江苏海力达机电制造有限公司 | Pump body that hydraulic jack lifted fast |
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| CN2545173Y (en) * | 2002-04-26 | 2003-04-16 | 扬州凯思特液压阀门自控设备制造有限公司 | Pulley guide device for shaft type lifting container |
| CN1584349A (en) * | 2004-06-04 | 2005-02-23 | 浙江大学 | Rough symmetric double actuating surfaces hydraulic cylinder with single rod |
| CN101929486A (en) * | 2010-08-12 | 2010-12-29 | 湖州机床厂有限公司 | Composite oil cylinder |
| CN103256275A (en) * | 2013-02-01 | 2013-08-21 | 福建省龙岩盛通液压有限公司 | Quick double-acting hydraulic cylinder |
| CN104791325A (en) * | 2015-04-30 | 2015-07-22 | 合肥长源液压股份有限公司 | Pressurization prevention multistage oil cylinder |
| CN206458665U (en) * | 2017-02-20 | 2017-09-01 | 合肥长源液压股份有限公司 | A kind of primary and secondary differential hydro cylinder |
-
2017
- 2017-02-20 CN CN201710089905.4A patent/CN106678122B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2545173Y (en) * | 2002-04-26 | 2003-04-16 | 扬州凯思特液压阀门自控设备制造有限公司 | Pulley guide device for shaft type lifting container |
| CN1584349A (en) * | 2004-06-04 | 2005-02-23 | 浙江大学 | Rough symmetric double actuating surfaces hydraulic cylinder with single rod |
| CN101929486A (en) * | 2010-08-12 | 2010-12-29 | 湖州机床厂有限公司 | Composite oil cylinder |
| CN103256275A (en) * | 2013-02-01 | 2013-08-21 | 福建省龙岩盛通液压有限公司 | Quick double-acting hydraulic cylinder |
| CN104791325A (en) * | 2015-04-30 | 2015-07-22 | 合肥长源液压股份有限公司 | Pressurization prevention multistage oil cylinder |
| CN206458665U (en) * | 2017-02-20 | 2017-09-01 | 合肥长源液压股份有限公司 | A kind of primary and secondary differential hydro cylinder |
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| CN106678122A (en) | 2017-05-17 |
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