CN107191421B - A kind of lifter control device - Google Patents
A kind of lifter control device Download PDFInfo
- Publication number
- CN107191421B CN107191421B CN201710541421.9A CN201710541421A CN107191421B CN 107191421 B CN107191421 B CN 107191421B CN 201710541421 A CN201710541421 A CN 201710541421A CN 107191421 B CN107191421 B CN 107191421B
- Authority
- CN
- China
- Prior art keywords
- valve
- hydraulic fluid
- fluid port
- reversal valve
- reversal
- 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.)
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/862—Control during or prevention of abnormal conditions the abnormal condition being electric or electronic failure
- F15B2211/8626—Electronic controller failure, e.g. software, EMV, electromagnetic interference
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/895—Manual override
Abstract
The invention discloses a kind of lifter control devices, including oil absorption filter, gear pump, high-pressure filter, hydraulic pressure output valve group, automatically controlled valve group, oil circuit switching valve, control mechanism and lifting column plug cylinder；Oil circuit switching valve includes the first reversal valve and the second reversal valve, and is mechanical valve；Wherein, oil absorption filter, gear pump, high-pressure filter and hydraulic pressure output valve group, the first reversal valve, automatically controlled valve group and the second reversal valve are sequentially connected；And automatically controlled valve group is connect by another hydraulic fluid port with the second reversal valve.Under first predetermined operating mode, fluid successively enters automatically controlled valve group after hydraulic pressure output valve group export via the first reversal valve, and control mechanism controls automatically controlled valve group by the second reversal valve to liftout plunger oil supply cylinder；Under second predetermined operating mode, fluid is after hydraulic pressure output valve group export through from the second reversal valve to liftout plunger oil supply cylinder.When the automatically controlled mode failures even of lifter, the switching of automatically controlled pattern and manual mode may be implemented.
Description
Technical field
The present invention relates to agricultural machinery technological field, a kind of especially lifter control device.
Background technology
Lifter is the hydraulic device for promotion on tractor, and principle is that the oily liquid pressure generated is leaned on to be promoted.
Automatically controlled lifter is to apply lifter type the most typical at this stage, have manipulation precisely, driver's operation is comfortable, can lead
The advantages that dynamic damping.But some disadvantages are also exposed when practical application, after automatically controlled lifter breaks down, maintenance difficulty is general
Bigger, failure cannot usually exclude in time, and if lifter relies only on automatically controlled scheme control, each electric control structure occurs
It can all cause complete machine that can not carry out normal operation when failure, downtime is long, extremely influences operating efficiency.
Invention content
The object of the present invention is to provide a kind of lifter control devices may be implemented when the automatically controlled mode failures even of lifter
The switching of automatically controlled pattern and manual mode.
Technical solution provided by the invention is as follows：A kind of lifter control device, including oil absorption filter, gear pump, height
Filter pressed oil device, hydraulic pressure output valve group, automatically controlled valve group, oil circuit switching valve, control mechanism and lifting column plug cylinder；The oil circuit conversion
Valve includes the first reversal valve and the second reversal valve, and is mechanical valve；
Wherein, the oil absorption filter, the gear pump, the high-pressure filter and hydraulic pressure output valve group, institute
The first reversal valve, the automatically controlled valve group and second reversal valve is stated to be sequentially connected；And the automatically controlled valve group passes through another
Hydraulic fluid port is connect with second reversal valve；
Under first predetermined operating mode, fluid is after hydraulic pressure output valve group export successively via first reversal valve, institute
Automatically controlled valve group and second reversal valve are stated to the liftout plunger oil supply cylinder；
Under second predetermined operating mode, fluid is after hydraulic pressure output valve group export through from second reversal valve to described
Liftout plunger oil supply cylinder.
The technical program, designs two oil circuits, and an oil circuit passes through automatically controlled valve group, a set of machine of Parallel Design on the oil circuit
Tool control device, without automatically controlled by hydraulic pressure delivery valve is directly connected to by mechanical structure of reversing valve with lifting column plug cylinder
Valve group.So realize the conversion of automatically controlled same armstrong's patent manipulation.Mechanical course can be changed into automatically controlled failure so that
Still loss can be reduced with normal operation during automatically controlled failure, accelerate operating efficiency.
Preferably, first reversal valve and second reversal valve drive synchronization action by same valve rod, and described first
Reversal valve is equipped at least three hydraulic fluid ports, respectively the first hydraulic fluid port, the second hydraulic fluid port and third hydraulic fluid port, and second reversal valve is equipped with
At least three hydraulic fluid ports, respectively the 4th hydraulic fluid port, the 5th hydraulic fluid port and the 6th hydraulic fluid port；
Wherein, the hydraulic pressure delivery valve includes at least two the first valve block, the second valve block valve blocks, and first valve block is by hand
Handle drive actions；One hydraulic fluid port of first valve block is connect with the first hydraulic fluid port of first reversal valve, first valve block
Another hydraulic fluid port connect with the 4th hydraulic fluid port of second reversal valve, the second oil of the automatically controlled valve group and first reversal valve
5th hydraulic fluid port of mouth and second reversal valve is separately connected, the 6th hydraulic fluid port and the liftout plunger of second reversal valve
Cylinder connects；Third hydraulic fluid port is connect with hydraulic pressure output valve group with oil return；
Under first predetermined state, the first reversal valve described in valve rod action drives commutates valve events with described second, and described the
One hydraulic fluid port is connected with second hydraulic fluid port, and the 5th hydraulic fluid port is connected with the 6th hydraulic fluid port；Act on the handle make fluid from
First valve block enters first hydraulic fluid port；
Under second predetermined state, the first reversal valve described in valve rod action drives commutates valve events with described second, and described the
One hydraulic fluid port is connected with the third hydraulic fluid port, and the 4th hydraulic fluid port is connected with the 6th hydraulic fluid port；Act on the handle make fluid from
First valve block enters the 4th hydraulic fluid port.
The technical program, valve rod adjusts the first reversal valve simultaneously and automatically controlled and Mechanical course is completed in the action of the second reversal valve
Switching, and two hydraulic fluid ports of one valve block of hydraulic pressure delivery valve are corresponded into parallel electrically-controlled oilway and Mechanical course oil circuit respectively and are connected
It connects, adjusting oil outlet by the handle in the valve block makes fluid flow to electrically-controlled oilway or Mechanical course oil circuit.First commutation
The conversion be connected on valve and the second reversal valve on oil circuit should be carried out at the same time, so regulate and control two by a valve rod
Valve body.
Specifically, first valve block is connect by quick-release connector with the 4th interface of second reversal valve.
Specifically, it is its fuel feeding that the hydraulic pressure output valve group, which is circumscribed with several two-way cylinders,.The two-way cylinder can be with
Drive the equipment being attached thereto.
Specifically, first reversal valve and second reversal valve are two-way triple valve.
A kind of lifter control device provided by the invention can bring following at least one advantageous effect：
1, with reference to the parallel principle of oil circuit, retain the electrically-controlled oilway of original lifter, and valve group and plunger case are exported in hydraulic pressure
Between a parallel Mechanical course oil circuit, when automatically controlled failure, switching to Mechanical course oil circuit makes whole device be changed into manually
Mechanical manipulation, it can be achieved that lifter general control operation.
2, the time that user is shut down due to the automatically controlled failure of lifter is reduced.
Description of the drawings
Below by a manner of clearly understandable, preferred embodiment is described with reference to the drawings, to a kind of lifter control of the present invention
Above-mentioned characteristic, technical characteristic, advantage and its realization method of device processed are further described.
Fig. 1 is the systematic schematic diagram of lifter control device.
Drawing reference numeral explanation：1, oil absorption filter, 2, gear pump, 3, high-pressure filter, 4, automatically controlled valve group, 5, hydraulic pressure output
Valve group, 6, quick-release connector, 7, two-way cylinder, 8, lifting system plunger case, 9, oil circuit switching valve, the 91, first reversal valve, 92,
Second reversal valve, 93, valve rod；
B, the first hydraulic fluid port, P, the second hydraulic fluid port, T, third hydraulic fluid port, a, the 4th hydraulic fluid port, P2, the 5th hydraulic fluid port P1, the 6th hydraulic fluid port.
Specific implementation mode
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, control is illustrated below
The specific implementation mode of the present invention.It should be evident that drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing, and obtain other embodiments.
To make simplified form, part related to the present invention is only schematically shown in each figure, their not generations
Its practical structures as product of table.
This example discloses a kind of lifter control device, including oil absorption filter 1, gear pump 2, high-pressure filter 3, liquid
Pressure output valve group 5, automatically controlled valve group 4 and oil circuit switching valve 9 and lifting column plug cylinder 8；
Oil circuit switching valve 9 includes the first reversal valve 91 and the second reversal valve 92, is two-way triple valve, the first reversal valve 91
Including the first hydraulic fluid port b, the second hydraulic fluid port P and third hydraulic fluid port T, the second reversal valve 92 is equipped at least three hydraulic fluid ports, and the respectively the 4th
Hydraulic fluid port a, the 5th hydraulic fluid port P2 and the 6th hydraulic fluid port P1.It includes three valve blocks 5a, 5b, 5c that hydraulic pressure, which exports valve group, is that three tunnels six are logical
Valve.First reversal valve 91 and the second reversal valve 92 are controlled by a valve rod 93, and action synchronizes.Illustratively, the first reversal valve
91 and second reversal valve 92 be preferably ball valve.
Automatically controlled valve group 4 is connect with the second hydraulic fluid port P and the 5th hydraulic fluid port P2, and the 6th hydraulic fluid port P1 is connect with lifting column plug cylinder 8.
The high-voltage oil liquid that fluid is produced by oil absorption filter 1, gear pump 2 enters hydraulic pressure by high-pressure filter 3 and exports
The intermediate hydraulic fluid port of valve group 9, the 5a valve blocks of hydraulic pressure output valve group 9 is connect with the first hydraulic fluid port b, and another hydraulic fluid port B3 passes through quick-release connector 6
It is connect with the 4th hydraulic fluid port a.
When oil circuit switching valve 9, which is in, illustrates right position, the first hydraulic fluid port b is connected with the second hydraulic fluid port P, the 5th hydraulic fluid port P2 and the 6th
Hydraulic fluid port P1 conductings.The valve group 5 of hydraulic pressure output at this time is in position in diagram, and via valve block 5a, 5b, 5c, manipulation is automatically controlled to be carried high-voltage oil liquid
Rise device control mechanism, first hydraulic fluid port b and second hydraulic fluid port P of the high-voltage oil liquid from intermediate the first reversal valve of hydraulic fluid port approach 91 of 5a valve blocks
Into automatically controlled valve group 4, at this time by control mechanism can make high-voltage oil liquid from automatically controlled valve group 4 the second reversal valve of approach 92 the 5th
Hydraulic fluid port P2 and the 6th hydraulic fluid port P1, pressure oil or oil return lifting column plug cylinder 8, realize the promotion or decline of lifter.Lifter at this time
Control device is in automatically controlled pattern.
And when oil circuit conversion 9 is in left position, the first hydraulic fluid port b is connected with third hydraulic fluid port T, the 4th hydraulic fluid port a and the 6th hydraulic fluid port
P1 is connected.High-voltage oil liquid exports position approach the first hydraulic fluid port b and third hydraulic fluid port T oil returns in valve group 5, hydraulic pressure output via hydraulic pressure at this time
Valve group 5 is neutral oil return state.The double acting of 5a valve blocks is changed to single-acting, the second reversal valve is connected to by quick-release connector 6
The handle of 92 the 4th hydraulic fluid port a, manipulation 5a valve blocks convert 5a valve blocks state as left position or right position, can make high-voltage oil liquid approach 5a valves
The B3 mouths of block flow through the 4th hydraulic fluid port a and the 6th hydraulic fluid port P1 of the second reversal valve 92, pressure oil or oil return lifting column plug cylinder 8, and realization carries
Rise the promotion or decline of device.Fluid is not flow through automatically controlled valve group 4 under this state, and lifter control device is in manual mode.
The technical concept essence for studying carefully this embodiment, is to keep original oil circuit of the automatically controlled pattern of lifter constant, and by liquid
Pressure output oil inlet and one oil circuit of parallel connection at plunger cylinder, by oil circuit switching valve converting parallel oil circuit, and make electricity
The oil circuit of control pattern is different and fails.By manual operation, the working condition of hydraulic pressure delivery valve will be changed, one hydraulic fluid port is turned
It is connected to another oil circuit of oil circuit switching valve and then is connected to plunger cylinder, realize that manual operation lifter is promoted.Oil circuit switching valve
Can type selecting Electromagnetic Control, by automatically controlled button carry out oil circuit conversion, it is handling good, it is of high cost.Oil circuit switching valve can be with electrically-controlled valve
Or hydraulic pressure output valve group is integrated, i.e., automatically controlled valve group or hydraulic pressure output valve group carry oil circuit conversion function, compact-sized, pipeline letter
Single, handling good, automatically controlled valve group or hydraulic pressure output valve block structure need to be researched and developed again.So it should be noted that the above is only
It is the preferred embodiment of the present invention, the connection type of parallel oil circuit and the type selecting of oil circuit switching valve are not limited to this implementation
Example.
It should be noted that above-described embodiment can be freely combined as needed.It should be pointed out that for the art
For those of ordinary skill, various improvements and modifications may be made without departing from the principle of the present invention, these improvement
Protection scope of the present invention is also should be regarded as with retouching.
Claims (6)
1. a kind of lifter control device, which is characterized in that including oil absorption filter, gear pump, high-pressure filter, hydraulic pressure output
Valve group, automatically controlled valve group, oil circuit switching valve, control mechanism and lifting column plug cylinder；The oil circuit switching valve includes the first reversal valve
And it is mechanical valve with the second reversal valve；
Wherein, the oil absorption filter, the gear pump, the high-pressure filter and hydraulic pressure output valve group, described the
One reversal valve, the automatically controlled valve group and second reversal valve are sequentially connected；And the automatically controlled valve group passes through another hydraulic fluid port
It is connect with second reversal valve；
Under first predetermined operating mode, fluid is after hydraulic pressure output valve group export successively via described in first reversal valve entrance
Automatically controlled valve group, the control mechanism control the automatically controlled valve group by second reversal valve to the liftout plunger oil supply cylinder；
Under second predetermined operating mode, fluid is after hydraulic pressure output valve group export through from second reversal valve to the lifting column
Plug cylinder fuel feeding.
2. lifter control device according to claim 1, which is characterized in that first reversal valve is changed with described second
Synchronization action, first reversal valve is driven to be equipped at least three hydraulic fluid ports, respectively the first hydraulic fluid port, second by same valve rod to valve
Hydraulic fluid port and third hydraulic fluid port, second reversal valve are equipped at least three hydraulic fluid ports, respectively the 4th hydraulic fluid port, the 5th hydraulic fluid port and the
Six hydraulic fluid ports；
Wherein, the hydraulic pressure delivery valve includes at least two the first valve block, the second valve block valve blocks, and first valve block is driven by handle
Action；One hydraulic fluid port of first valve block is connect with the first hydraulic fluid port of first reversal valve, first valve block it is another
One hydraulic fluid port is connect with the 4th hydraulic fluid port of second reversal valve, the second hydraulic fluid port of the automatically controlled valve group and first reversal valve with
And the 5th hydraulic fluid port of second reversal valve is separately connected, the 6th hydraulic fluid port and the lifting column plug cylinder of second reversal valve connect
It connects；Third hydraulic fluid port is connect with hydraulic pressure output valve group with oil return；
Under first predetermined state, the first reversal valve described in valve rod action drives and the second commutation valve events, first oil
Mouth is connected with second hydraulic fluid port, and the 5th hydraulic fluid port is connected with the 6th hydraulic fluid port；Acting on the handle makes fluid from described
First valve block enters first hydraulic fluid port；
Under second predetermined state, the first reversal valve described in valve rod action drives and the second commutation valve events, first oil
Mouth is connected with the third hydraulic fluid port, and the 4th hydraulic fluid port is connected with the 6th hydraulic fluid port；Acting on the handle makes fluid from described
First valve block enters the 4th hydraulic fluid port.
3. lifter control device according to claim 2, it is characterised in that：First valve block by quick-release connector with
4th interface of second reversal valve connects.
4. lifter control device according to claim 1, it is characterised in that：The hydraulic pressure output valve group is circumscribed with several
Two-way cylinder is its fuel feeding.
5. lifter control device according to claim 1, it is characterised in that：First reversal valve is changed with described second
It is two-way triple valve to valve.
6. lifter control device according to claim 1, it is characterised in that：First reversal valve is changed with described second
It is ball valve to valve.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710541421.9A CN107191421B (en) | 2017-07-05 | 2017-07-05 | A kind of lifter control device |
| PCT/CN2018/091891 WO2019007208A1 (en) | 2017-07-05 | 2018-06-19 | Lifter control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710541421.9A CN107191421B (en) | 2017-07-05 | 2017-07-05 | A kind of lifter control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107191421A CN107191421A (en) | 2017-09-22 |
| CN107191421B true CN107191421B (en) | 2018-10-30 |
Family
ID=59881290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710541421.9A Active CN107191421B (en) | 2017-07-05 | 2017-07-05 | A kind of lifter control device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107191421B (en) |
| WO (1) | WO2019007208A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191421B (en) * | 2017-07-05 | 2018-10-30 | 江苏常发农业装备股份有限公司 | A kind of lifter control device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201176982Y (en) * | 2008-03-04 | 2009-01-07 | 福田雷沃国际重工股份有限公司 | Device for implementing single and double acting conversion of tractor lifting cylinder |
| CN103256334A (en) * | 2013-04-28 | 2013-08-21 | 潍坊威度电子科技有限公司 | Double-action hydraulic oil cylinder tractor suspension hydraulic system based on electromagnetic digital valve |
| CN104196803A (en) * | 2014-09-11 | 2014-12-10 | 中国农业大学 | Multifunctional thread insertion valve used for heavy tractor electro-hydraulic lifter |
| CN105422530A (en) * | 2014-10-30 | 2016-03-23 | 徐州重型机械有限公司 | Pilot integrated multi-way valve group and crane |
| CN106168237A (en) * | 2016-09-14 | 2016-11-30 | 河南瑞创通用机械制造有限公司 | A kind of tractor hydraulic system assembly |
| CN206889377U (en) * | 2017-07-05 | 2018-01-16 | 江苏常发农业装备股份有限公司 | A kind of lifter control device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6000315A (en) * | 1998-05-04 | 1999-12-14 | Deere & Company | Lift control for implement frame |
| JP3833911B2 (en) * | 2001-08-07 | 2006-10-18 | 新キャタピラー三菱株式会社 | Hydraulic circuit for construction machinery |
| CN201420716Y (en) * | 2009-04-07 | 2010-03-10 | 金城集团有限公司 | Lifting device for remote-control hydraulic control pedal |
| CN102926359A (en) * | 2011-08-08 | 2013-02-13 | 扬州蓝翔机电工程有限公司 | Manual and electric dual-purpose integrated hydraulic hoist |
| CN205383127U (en) * | 2014-10-19 | 2016-07-13 | 温州市维东润滑设备制造有限公司 | Automatic two powered hydraulic pressure pump stations of switching mode |
| CN205136183U (en) * | 2015-10-27 | 2016-04-06 | 中国矿业大学 | Energy -conserving high -efficient hydraulic lifting system of multi -cylinder synchronization |
| CN105179343B (en) * | 2015-10-27 | 2017-03-22 | 中国矿业大学 | Multi-cylinder synchronous energy-saving efficient hydraulic lifting system and method |
| CN107191421B (en) * | 2017-07-05 | 2018-10-30 | 江苏常发农业装备股份有限公司 | A kind of lifter control device |
-
2017
- 2017-07-05 CN CN201710541421.9A patent/CN107191421B/en active Active
-
2018
- 2018-06-19 WO PCT/CN2018/091891 patent/WO2019007208A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201176982Y (en) * | 2008-03-04 | 2009-01-07 | 福田雷沃国际重工股份有限公司 | Device for implementing single and double acting conversion of tractor lifting cylinder |
| CN103256334A (en) * | 2013-04-28 | 2013-08-21 | 潍坊威度电子科技有限公司 | Double-action hydraulic oil cylinder tractor suspension hydraulic system based on electromagnetic digital valve |
| CN104196803A (en) * | 2014-09-11 | 2014-12-10 | 中国农业大学 | Multifunctional thread insertion valve used for heavy tractor electro-hydraulic lifter |
| CN105422530A (en) * | 2014-10-30 | 2016-03-23 | 徐州重型机械有限公司 | Pilot integrated multi-way valve group and crane |
| CN106168237A (en) * | 2016-09-14 | 2016-11-30 | 河南瑞创通用机械制造有限公司 | A kind of tractor hydraulic system assembly |
| CN206889377U (en) * | 2017-07-05 | 2018-01-16 | 江苏常发农业装备股份有限公司 | A kind of lifter control device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019007208A1 (en) | 2019-01-10 |
| CN107191421A (en) | 2017-09-22 |
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