CN106704303B - A kind of electro-hydraulic actuator of linear lightweight - Google Patents
A kind of electro-hydraulic actuator of linear lightweight Download PDFInfo
- Publication number
- CN106704303B CN106704303B CN201710042573.4A CN201710042573A CN106704303B CN 106704303 B CN106704303 B CN 106704303B CN 201710042573 A CN201710042573 A CN 201710042573A CN 106704303 B CN106704303 B CN 106704303B
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- Prior art keywords
- piston
- hydraulic cylinder
- rod
- main casing
- electro
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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
- F15B15/18—Combined units comprising both motor and pump
Abstract
The invention discloses a kind of linear electro-hydraulic actuator of lightweight, it includes main casing, bidirectional rotation electromagnetic pump, valve group and single-piston-rod hydraulic cylinder as execution unit, the bidirectional rotation electromagnetic pump is set to main casing tail portion, and its oil inlet and outlet is connected to two oil inlets of the valve group, the single-piston-rod hydraulic cylinder is set to the front end of the main casing, two oil outlets of the valve group are connected separately with hard tube pipeline and hose line, the hard tube pipeline is connected to the rodless cavity of single-piston-rod hydraulic cylinder, the hose line is connected to the rod chamber of single-piston-rod hydraulic cylinder.Electro-hydraulic actuating system is placed in tubular shell by the present invention, and compact-sized, small in size, light-weight, power density is big, easily integrated with other device products, light reliable, and the application especially for robot field provides new approaches.
Description
Technical field
The present invention relates to a kind of actuator, more particularly, to a kind of electro-hydraulic actuator of linear lightweight.
Background technique
Electro-hydraulic actuator is popular electromechanical liquid product studied both at home and abroad at present, usually by motor, two-way quantitative pump, control
Valve, executive component and fuel tank composition processed, are pumped by motor drive two-way quantitative and generate hydraulic power, push directly on executive component work
Make.It is good in fly-by-wire flight control system, vehicle transmission field application effect, but outside driving such as joint of robot and is wearable
Exoskeleton suit etc. is ineffective to the applications that structural compactness, flexibility, flexibility are more demanding, this kind of electro-hydraulic actuator exists
It is had the following deficiencies in specific application process:
1) it is limited by the arrangement of electrohydraulic system oil sources and accumulator, system complex, occupied space is big；
2) it acts inflexible, it is difficult to be suitable for high request occasion；
3) energy consumption is high, all there are certain requirements to power supply offer amount and hydraulic oil demand；
4) potential leakage point is more, and maintenance is difficult.
Summary of the invention
It is in the prior art electro-hydraulic to solve the purpose of the present invention is to provide a kind of linear electro-hydraulic actuator of lightweight
Actuator has that system complex, occupied space are big, energy consumption is high, maintenance is difficult.
To achieve this purpose, the present invention adopts the following technical scheme:
A kind of electro-hydraulic actuator of linear lightweight comprising main casing, bidirectional rotation electromagnetic pump, valve group and as execution
The single-piston-rod hydraulic cylinder of component, wherein the bidirectional rotation electromagnetic pump is set to main casing tail portion, and its oil inlet and outlet and institute
The two oil inlets connection of valve group is stated, the single-piston-rod hydraulic cylinder is set to the front end of the main casing, and the two of the valve group go out
Hydraulic fluid port is connected separately with hard tube pipeline and hose line, and the hard tube pipeline is connected to the rodless cavity of single-piston-rod hydraulic cylinder, institute
Hose line is stated to be connected to the rod chamber of single-piston-rod hydraulic cylinder.
Particularly, the bidirectional rotation electromagnetic pump strikes up partnership the alternation fixed magnetic field and the pump housing that electromagnetism winding is formed,
Its middle pump body is any of gear pump, vane pump, ball pump or plunger pump.
Particularly, the valve group is different according to the operating condition of electro-hydraulic actuator, takes different control valves to combine, for electro-hydraulic
The operating condition that actuator bidirectional-movement is kept, using hydraulic lock control loop；The operating condition kept is acted for electro-hydraulic actuator lifting,
Using pressure oil counterbalance valve control loop；For the operating condition that electro-hydraulic actuator pulling action is kept, controlled back using return oil pressure valve
Road；For the operating condition of electro-hydraulic actuator movement speed control, throttling speed control circuit is taken.The valve group can also take other valves simultaneously
The combination of body structure.
Particularly, when the piston rod of the single-piston-rod hydraulic cylinder stretches out, for the hose line in flat shape is inhaled, the list is living
When the piston rod of stopper rod hydraulic cylinder retracts, the hose line swells.Single-piston rod is made up by the convergent-divergent of hose line
The oil mass difference of hydraulic cylinder rod chamber and rodless cavity, hose line plays the role of accumulator repairing pressure maintaining, while the hose can
To be substituted with accumulator.
Particularly, positioning cover plate is provided between the bidirectional rotation electromagnetic pump and main casing.
Particularly, end caps, the other end are provided between the tailpiece of the piston rod and main casing of the single-piston-rod hydraulic cylinder
Holding screw by being mounted on main casing barrel presses.
Particularly, the hose line is set around in the shape of a spiral except the cylinder body of the single-piston-rod hydraulic cylinder.
Compared with prior art, the invention has the benefit that
1) system simplifies, and is convenient to mount and dismount, maintainability is good；
2) masterly in face of various working, the application especially for robot field provides solution；
3) space occupancy volume is small, compact-sized, light-weight, and low energy consumption；
4) strong and reliable integral structure, eliminates potential leakage point, and maintenance requires to be greatly reduced.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the electro-hydraulic actuator of linear lightweight that the specific embodiment of the invention 1 provides；
Fig. 2 is the exterior figure for the electro-hydraulic actuator of linear lightweight that the specific embodiment of the invention 1 provides；
Fig. 3 is the hydraulic lock control of the valve group for the electro-hydraulic actuator of linear lightweight that the specific embodiment of the invention 1 provides
Circuit processed；
Fig. 4 is the throttle grverning of the valve group for the electro-hydraulic actuator of linear lightweight that the specific embodiment of the invention 1 provides
Circuit；
Fig. 5 is the pressure oil back pressure of the valve group for the electro-hydraulic actuator of linear lightweight that the specific embodiment of the invention 1 provides
Valve control loop；
Fig. 6 is the return oil pressure of the valve group for the electro-hydraulic actuator of linear lightweight that the specific embodiment of the invention 1 provides
Valve control loop.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
It please refers to shown in Fig. 1 and Fig. 2, in the present embodiment, a kind of linear electro-hydraulic actuator of lightweight comprising main casing
1, bidirectional rotation electromagnetic pump 2, valve group 3 and the single-piston-rod hydraulic cylinder 4 as execution unit, wherein the bidirectional rotation electromagnetism
Pump 2 is set to 1 tail portion of main casing, is positioned between the two by positioning cover plate 5, the oil inlet and outlet of the bidirectional rotation electromagnetic pump 2
It is connected to two oil inlets of the valve group 3, the single-piston-rod hydraulic cylinder 4 is set to the front end of main casing 1, the single-piston rod
It is provided with end caps 6 between the tailpiece of the piston rod and main casing 1 of hydraulic cylinder 4, the other end is by being mounted on the tightening of 1 barrel of main casing
Screw 7 presses, and 3 liang of oil outlets of the valve group are connected separately with hard tube pipeline 8 and hose line 9, and the hard tube pipeline 8 is lived with single
The rodless cavity of stopper rod hydraulic cylinder 4 is connected to, and the hose line 9 is connected to the rod chamber of single-piston-rod hydraulic cylinder 4, and the hose
Pipeline 9 is set around in the shape of a spiral except the cylinder body of the single-piston-rod hydraulic cylinder 4.
When bidirectional rotation electromagnetic pump 2 rotates in the forward direction, pressure oil flows through 3 one side runner of valve group, hard tube pipeline 8 to single-piston rod
4 rodless cavity of hydraulic cylinder pushes 4 piston rod of single-piston-rod hydraulic cylinder to stretch out, while 4 rod chamber oil liquid of single-piston-rod hydraulic cylinder returns
Stream, hose line 9 is gradually in the flat shape of suction.When bidirectional rotation electromagnetic pump 2 reversely rotates, oil liquid commutation, it is another that pressure oil flows through valve group 3
One side runner, hose line 9 to 4 rod chamber of single-piston-rod hydraulic cylinder push 4 piston rod of single-piston-rod hydraulic cylinder to retract, simultaneously
The reflux of 4 rodless cavity oil liquid of single-piston-rod hydraulic cylinder, as oil liquid constantly flows back, hose line 9 slightly swells.
It please refers to shown in Fig. 3 to Fig. 6, the valve group 3 is different according to the operating condition of electro-hydraulic actuator, takes different control valves
Combination.For the operating condition that electro-hydraulic actuator bidirectional-movement is kept, using hydraulic lock control loop shown in Fig. 3；For electro-hydraulic work
The operating condition of dynamic device movement speed control, using throttling speed control circuit shown in Fig. 4；It is kept for electro-hydraulic actuator lifting movement
Operating condition, using pressure oil counterbalance valve control loop shown in fig. 5；For the operating condition that electro-hydraulic actuator pulling action is kept, using Fig. 6
Shown in return oil pressure valve control loop.
The above embodiments only describe the basic principles and characteristics of the invention, and the invention is not restricted by the above cases,
Without departing from the spirit and scope, the invention also has various changes and changes, and these changes and changes are both fallen within
In scope of the claimed invention.The scope of the present invention is defined by the appended claims and its equivalents.
Claims (3)
1. a kind of electro-hydraulic actuator of linear lightweight comprising main casing, bidirectional rotation electromagnetic pump, valve group and as enforcement division
The single-piston-rod hydraulic cylinder of part, which is characterized in that the bidirectional rotation electromagnetic pump is set to main casing tail portion, and its oil inlet and outlet
It is connected to two oil inlets of the valve group, the single-piston-rod hydraulic cylinder is set to the front end of the main casing, the valve group
Two oil outlets are connected separately with hard tube pipeline and hose line, the rodless cavity company of the hard tube pipeline and single-piston-rod hydraulic cylinder
Logical, the hose line is connected to the rod chamber of single-piston-rod hydraulic cylinder；
The hose line is set around in the shape of a spiral except the cylinder body of the single-piston-rod hydraulic cylinder, the single-piston-rod hydraulic cylinder
Piston rod when stretching out, the hose line is in inhaling flat shape, when the piston rod of the single-piston-rod hydraulic cylinder retracts, the hose
Pipeline swells；
Positioning cover plate, the tailpiece of the piston rod of the single-piston-rod hydraulic cylinder are provided between the bidirectional rotation electromagnetic pump and main casing
End caps are provided between main casing, the other end is pressed by the holding screw for being mounted on main casing barrel.
2. the electro-hydraulic actuator of linear lightweight according to claim 1, which is characterized in that the bidirectional rotation electromagnetic pump
Alternation fixed magnetic field and the pump housing that electromagnetism winding is formed are struck up partnership, middle pump body is gear pump, vane pump, ball pump or column
Plug pumps any.
3. the electro-hydraulic actuator of linear lightweight according to claim 1, which is characterized in that the valve group is adopted according to operating condition
With hydraulic lock control loop, throttling speed control circuit, pressure oil counterbalance valve control loop, return oil pressure valve control loop any or
Several combinations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710042573.4A CN106704303B (en) | 2017-01-20 | 2017-01-20 | A kind of electro-hydraulic actuator of linear lightweight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710042573.4A CN106704303B (en) | 2017-01-20 | 2017-01-20 | A kind of electro-hydraulic actuator of linear lightweight |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106704303A CN106704303A (en) | 2017-05-24 |
| CN106704303B true CN106704303B (en) | 2019-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710042573.4A Active CN106704303B (en) | 2017-01-20 | 2017-01-20 | A kind of electro-hydraulic actuator of linear lightweight |
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| Country | Link |
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| CN (1) | CN106704303B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3905591B2 (en) * | 1997-02-04 | 2007-04-18 | 株式会社ショーワ | Tilt / trim device for marine propulsion device and method for assembling tilt / trim device |
| CN2577023Y (en) * | 2002-11-03 | 2003-10-01 | 张洪庆 | Electrohydraulic actuator |
| CN102384124A (en) * | 2011-09-15 | 2012-03-21 | 上海当世流体动力控制设备有限公司 | Integral type minisize electrohydraulic actuator |
| CN202971412U (en) * | 2012-12-17 | 2013-06-05 | 上海当世流体动力控制设备有限公司 | Integrated miniature electro-hydraulic actuator |
| CN206468618U (en) * | 2017-01-20 | 2017-09-05 | 华中科技大学无锡研究院 | A kind of electro-hydraulic actuator of linear lightweight |
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2017
- 2017-01-20 CN CN201710042573.4A patent/CN106704303B/en active Active
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| Publication number | Publication date |
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| CN106704303A (en) | 2017-05-24 |
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