CN106678122A - Child-mother differential hydraulic cylinder - Google Patents
Child-mother differential hydraulic cylinder Download PDFInfo
- Publication number
- CN106678122A CN106678122A CN201710089905.4A CN201710089905A CN106678122A CN 106678122 A CN106678122 A CN 106678122A CN 201710089905 A CN201710089905 A CN 201710089905A CN 106678122 A CN106678122 A CN 106678122A
- Authority
- CN
- China
- Prior art keywords
- big
- piston rod
- cylinder body
- cylinder
- little
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Abstract
The invention discloses a child-mother differential hydraulic cylinder. The child-mother differential hydraulic cylinder comprises a big cylinder body, as well as a big piston rod and a big piston which are matched with the big cylinder body, and further comprises a small cylinder body, as well as a small piston rod and a small piston which are matched with the small cylinder body, wherein the small cylinder body is connected to the interior of the big piston rod in an inserting manner; the travel direction of the small piston rod is opposite to that of the big piston rod; and the small piston rod is fixedly connected with the big cylinder body. The child-mother differential hydraulic cylinder is simple in structure, low in manufacturing cost and maintenance cost, and effectively realizes small flow rate but large pushing force, the production cost is lowered, the energy consumption is reduced and economical benefits are increased.
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 to be changed into mechanical energy, do the hydraulic pressure execution of straight reciprocating motion (or oscillating motion) hydraulic energy
Element.Its simple structure, reliable operation.When being realized moving back and forth with it, deceleration device can be removed from, and without between transmission
Gap, stable movement, therefore be used widely in the hydraulic system of various machineries.
Current era, energy-conserving and environment-protective have become the theme of development in science and technology, and Hydraulic Industry is also such.General high thrust hydraulic pressure
Cylinder is accomplished by 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, the waste of the energy is which results in.
The content of the invention
The technical problem to be solved is to provide a kind of primary and secondary differential hydro cylinder that can realize low discharge high thrust.
In order to solve above-mentioned technical problem, the present invention is adopted 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, little cylinder body and the small piston rod coordinated with little cylinder body and little work
Plug；
The little cylinder body is plugged in the big piston rod, and the stroke directions of the small piston rod and the big piston rod
Conversely, the small piston rod is fixedly connected with the big cylinder body.
Further, the small piston rod is provided with the first hydraulic pressure of the rodless cavity that the little cylinder body is entered for hydraulic oil
Oily passage.
Further, the small piston rod is provided with the second hydraulic pressure of the rod chamber that the little cylinder body is entered for hydraulic oil
Oily passage.
Further, oil pipe is provided 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 provided with another with the oil pipe
First fuel feed hole of end connection, with this first hydraulic oil channel is formed.
Further, cavity is provided 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 provided with the second fuel feed hole connected with the cavity, and the cavity is communicated with the small piston rod
With the oil-through hole of the rod chamber of little cylinder body, the second hydraulic oil channel is formed with this.
Further, the big cylinder body is provided with the first repairing hole for entering its rodless cavity for hydraulic oil.
Further, the big cylinder body is provided with the second repairing hole for entering its rod chamber for hydraulic oil.
Further, the big cylinder body is including big cylinder barrel, the big cylinder sleeve of the front end for being connected to big cylinder barrel and is connected to big
The big cylinder bottom of the rear end of cylinder barrel.
Further, the little cylinder body is including little cylinder barrel, the little cylinder sleeve of the front end for being connected to little cylinder barrel and is connected to little
The little cylinder bottom of the rear end of cylinder barrel.
Beneficial effects of the present invention are：
The present invention is operationally, on the one hand, hydraulic oil acts on big piston by the rodless cavity of big cylinder body, big so as to promote
Piston rod, on the other hand, hydraulic oil acts on valve piston by the rodless cavity of little cylinder body, because small piston rod is stationarily connected to
On big cylinder body, therefore little cylinder body adverse movement will be promoted, and due to small piston rod and big piston rod stroke directions conversely, because
This little cylinder body is identical with the stroke directions of big piston rod, and little cylinder body is plugged in big piston rod, therefore little 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, present configuration is relatively simple, making price is low, and maintenance cost is low, have effectively achieved low discharge and pushes away greatly
Power, has saved production cost, reduces energy resource consumption, increased economic benefit.
Description of the drawings
Fig. 1 is the structural representation of one embodiment of the invention.
In accompanying drawing the labelling of each part for：11 big cylinder barrels, 12 big cylinder sleeves, 121 second repairing holes, 122 second high pressure oilholes,
13 big cylinder bottoms, 131 first repairing holes, 132 first high pressure oilholes, 2 big piston rods, 3 big pistons, 41 little cylinder barrels, 42 little cylinder sleeves, 43
Little 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.
Specific embodiment
Below in conjunction with the accompanying drawings the invention will be further described：It should be noted that in the case where not conflicting, the application
In embodiment and the feature in embodiment can be mutually combined.Below with reference to the accompanying drawings and in conjunction with the embodiments describing this in detail
Invention.
Referring to Fig. 1.
The front-end and back-end of 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 coordinated with big piston 3, little cylinder body and with little cylinder body and valve piston 6；
The little 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
In opposite direction, the small piston rod 5 is fixedly connected with the big cylinder body.
This hydraulic cylinder is operationally, 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 little cylinder body, because small piston rod is to be fixedly connected
On big cylinder body, therefore little cylinder body adverse movement will be promoted, and due to small piston rod and big piston rod stroke directions conversely,
Therefore little cylinder body is identical with the stroke directions of big piston rod, and little cylinder body is plugged in big piston rod, therefore little 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 being embodied as, big cylinder sleeve and big cylinder bottom pass through locking screw
Nail is connected on big cylinder barrel；Big piston is connected on big piston rod by way of screw thread or welding.
Exemplified with a kind of common structure of little cylinder body in figure, including little cylinder barrel 41, be connected to little cylinder barrel 41 front end it is little
Cylinder sleeve 42 and be connected to little cylinder barrel 41 rear end little cylinder bottom 43.In being embodied as, little cylinder sleeve passes through locking screw with big piston
Nail connection, little cylinder sleeve is connected by screw thread with little cylinder barrel so that little cylinder barrel, little cylinder sleeve, big piston, big piston rod are assembled into whole
Body.Certainly, its medium and small cylinder barrel and little cylinder bottom can also be integrated formed structure parts with big piston rod.
In one embodiment, the small piston rod 5 is provided with the of the rodless cavity that the little cylinder body is entered for hydraulic oil
One hydraulic oil channel and for hydraulic oil enter the little cylinder body rod chamber the second hydraulic oil channel, facilitate hydraulic oil to enter
Corresponding intracavity is acted on.
In one embodiment, oil pipe 7 is provided with 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 provided with it is described
First fuel feed hole 51 of the other end connection of oil pipe 7, with this first hydraulic oil channel is formed；Sky is provided with the small piston rod 5
Chamber 53, the front end of the small piston rod 5 is provided with the second fuel feed hole 52 connected with the cavity 53, sets on the small piston rod 5
There is the oil-through hole 54 of the rod chamber for connecting the cavity 53 and little cylinder body, the second hydraulic oil channel is formed with this.So design, knot
Structure is simple, reasonable in design, easily sealing, effect reliability.
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 little cylinder bottom stretch in little cylinder barrel and with little cylinder
Gap is left between the inwall of cylinder, the front end face of little cylinder bottom is provided with a pit 431, and the front end of little cylinder bottom is communicated with the pit
The through hole 432 in the gap between 431 and the front end of little cylinder barrel and little cylinder bottom so that when stroke starts, hydraulic oil enters little cylinder
The rodless cavity of body；The front end of small piston rod is little head, and the first fuel feed hole 51 and the second fuel feed hole 52 are located in little head, little bar
Head is connected by way of welding with the back segment of small piston rod.
In one embodiment, the big cylinder body is provided with the first repairing hole 131 for entering its rodless cavity for hydraulic oil.
In work, suction function is formed because big piston rod is moved, the hydraulic oil in fuel tank will enter Radix Angelicae Dahuricae (Radix Heraclei Scabridi) by the first repairing hole 131
Plug forms to obtain cavity, namely the rodless cavity of big cylinder body with big cylinder bottom.In being embodied as, the first repairing hole 131 can be opened in vat
On bottom.
In one embodiment, the big cylinder body is provided with the second repairing hole 121 for entering its rod chamber for hydraulic oil.
During big piston rod backhaul, suction function is formed because big piston rod is moved, the hydraulic oil in fuel tank will be by 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 being embodied as, the second repairing hole 121 can
It is opened in vat to put.
In one embodiment, the big cylinder body is provided with the first high pressure oilhole 132 for entering its rodless cavity for pressure oil.
In being embodied as, the first high pressure oilhole 132 can be opened on big cylinder bottom.
In one embodiment, the big cylinder body is provided with the second high pressure oilhole 122 for entering its rod chamber for pressure oil.
In being embodied as, the second high pressure oilhole 122 can be opened in vat and put.
This hydraulic cylinder operationally, when load it is relatively low when, pressure oil from the first fuel feed hole enter valve piston and little cylinder bottom it
Between space, namely the rodless cavity of little cylinder body promotes in big piston rod, the hydraulic pressure at the same time due to suction function, in fuel tank
Oil will form to obtain cavity, namely the rodless cavity of big cylinder body by the first repairing hole into big piston and big cylinder bottom.When need compared with
During big pressure, pressure oil just forms to obtain cavity by the first high pressure oilhole into big piston and big cylinder bottom, so as to little cylinder barrel
Interior hydraulic oil promotes together big piston rod；
During big piston rod backhaul, when loading relatively low, pressure oil enters the rod chamber of little cylinder body from the second fuel feed hole, will be big
Piston rod is back promoted, 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 need larger pulling force when, pressure oil just by the second high pressure oilhole enter big piston with it is big
Cylinder sleeve forms to obtain cavity, so as to promote big piston rod backhaul together with the hydraulic oil in little cylinder barrel.
In the present invention, have equipped with sealing member, except weldment at each component contact position.
It should be understood that example as herein described and embodiment are not limited to the present invention, this area only for explanation
Technical staff can make various modifications or change according to it, all any modifications within the spirit and principles in the present invention, made,
Equivalent, improvement etc., should be included within the scope of the present invention.
Claims (7)
1. a kind of 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), little cylinder body and the small piston rod (5) coordinated with little cylinder body and valve piston (6)；
The little cylinder body is plugged in the big piston rod (2), and the row of the small piston rod (5) and the big piston rod (2)
Journey is in opposite direction, and the small piston rod (5) is fixedly connected with the big cylinder body.
2. primary and secondary differential hydro cylinder as claimed in claim 1, it is characterised in that：The small piston rod (5) is provided with for liquid
First hydraulic oil channel of the force feed into the rodless cavity of the little 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) be provided with for
Hydraulic oil enters the second hydraulic oil channel of the rod chamber of the little 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 is provided with for hydraulic pressure
First repairing hole (131) of the oil into 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 is provided with for hydraulic pressure
Second repairing hole (121) of the oil into 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) of the rear end for being connected to big cylinder barrel (11).
7. primary and secondary differential hydro cylinder as claimed in claim 1 or 2, it is characterised in that：The little cylinder body include little cylinder barrel (41),
The little cylinder sleeve (42) for being connected to the front end of little cylinder barrel (41) and the little cylinder bottom (43) of the rear end for being connected to little cylinder barrel (41).
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 true CN106678122A (en) | 2017-05-17 |
| CN106678122B CN106678122B (en) | 2018-05-04 |
Family
ID=58861127
Family Applications (1)
| 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106678122B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641271A (en) * | 2015-10-28 | 2017-05-10 | 南京凯盛国际工程有限公司 | Dynamic sealing structure for multi-freedom-degree slide rods |
| 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 |
| CN108425911A (en) * | 2018-05-29 | 2018-08-21 | 华中科技大学 | A kind of cylinder moving type composite hydraulic cylinder |
| CN108637153A (en) * | 2018-05-29 | 2018-10-12 | 华中科技大学 | A kind of free-forging hydraulic and its control method |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641271A (en) * | 2015-10-28 | 2017-05-10 | 南京凯盛国际工程有限公司 | Dynamic sealing structure for multi-freedom-degree slide rods |
| 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 |
| CN108425911A (en) * | 2018-05-29 | 2018-08-21 | 华中科技大学 | A kind of cylinder moving type composite hydraulic cylinder |
| CN108637153A (en) * | 2018-05-29 | 2018-10-12 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106678122B (en) | 2018-05-04 |
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