CN208251214U - Excavate Electrical Control inverted flux control system - Google Patents
Excavate Electrical Control inverted flux control system Download PDFInfo
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- CN208251214U CN208251214U CN201820839806.3U CN201820839806U CN208251214U CN 208251214 U CN208251214 U CN 208251214U CN 201820839806 U CN201820839806 U CN 201820839806U CN 208251214 U CN208251214 U CN 208251214U
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Abstract
The utility model discloses a kind of excavation Electrical Control inverted flux control systems, belong to technical field of engineering machinery.It solves that structure existing for conventional excavators inverted flux control system in the prior art is more complex, defect of inconvenient maintenance.Its main structure includes main pump assembly, hydraulic oil container, valve body valve rod assembly and executive component, and the oil inlet of the main pump assembly is connected with hydraulic tank, and oil outlet is connect with valve body valve rod assembly；The valve body valve rod assembly is connect with executive component, it further include ECU electronic control unit, solenoid valve block assembly and ratio valve group assembly, the main pump assembly is also connect with solenoid valve block assembly, and the ECU electronic control unit is connect with handle and solenoid valve block assembly respectively；The ratio valve group assembly is connect with solenoid valve block assembly, ECU electronic control unit and executive component respectively.The utility model is mainly used in the engineering machinery such as excavator.
Description
Technical field:
The utility model belongs to technical field of engineering machinery, specifically, more particularly to a kind of excavation Electrical Control minus flow
Control system.
Background technique:
In recent years, the investment with country in terms of the infrastructure such as water conservancy, highway, railway, cities and towns, domestic excavator
Market achieves fast development；Excavator is increasing to the contribution of infrastructure as a kind of engineering machinery, especially people
For operating efficiency pursue it is higher and higher, so excavator play effect it is also increasing, in greatly dig in, minus flow system
Excavator occupies more than half market share.
Multichannel directional control valve (hereinafter referred to as multi-way valve) is the core component of excavator hydraulic system, and multi-way valve controls liquid
Press pump realizes that excavator is various to the assignment of traffic, priority level and composite move of the executive components such as each hydraulic cylinder, hydraulic motor
One action and composite move.
Minus flow system acts on the variable regulating mechanism of pump by the pressure signal before position throttle orifice in acquisition main control valve
On, pumpage is inversely proportional with pressure signal；When normal work, the oil liquid for pumping discharge flows to execution machine by main control valve a part
Structure, a part oil return after center bypass oil duct, minus flow feedback valve.When controlling executing agency's deceleration, executing agency is gone to
Oil liquid is reduced, and is bypassed the oil increasing of oil duct oil return, the pressure rise before minus flow feedback valve throttle orifice, this pressure signal leads to
It crosses FL or FR is acted on pump, reduce corresponding pumpage；Conversely, removing the oil of executing agency when controlling executing agency's acceleration
Liquid increases, and the oil liquid through center bypass oil duct is reduced, and lower pressure signal acts on the regulating mechanism of pump, makes respective pump
Discharge capacity it is big, match to meet the demand of the flow and executing agency of pump to flow.
Traditional minus flow system has the disadvantage that:
1, pilot handle needs to connect many hydraulic hoses, be easy to cause hydraulic fluid leak, pollutes environment；
2, the fluid pressure line of pilot handle is limited by space, and maintenance is inconvenient；
3, it needs to press signal with logic valve block comparison liquid, structure is more complicated；
4, straight line walking realizes that structure is complicated, to castings desire height by each valve rod and the cooperation of valve body oil duct；
5, cannot achieve it is unattended, in screed operation to driver operation require it is relatively high.
Summary of the invention:
It is more complex, inconvenient maintenance in order to solve structure existing for conventional excavators inverted flux control system in the prior art
Disadvantage, the utility model provide a kind of excavation Electrical Control inverted flux control system being different from the prior art, specifically for
The special operation conditions such as relatively hazardous mining area and leveling carry out operation.
To achieve the goals above, the utility model adopts the following technical solutions realization:
A kind of excavation Electrical Control inverted flux control system, including main pump assembly, hydraulic oil container, valve body valve rod assembly and execution
The oil inlet of element, the main pump assembly is connected with hydraulic tank, and oil outlet is connect with valve body valve rod assembly；The valve body valve rod
Assembly is connect with executive component, further includes ECU electronic control unit, solenoid valve block assembly and ratio valve group assembly, the main pump
Assembly is also connect with solenoid valve block assembly, and the ECU electronic control unit is connect with handle and solenoid valve block assembly respectively；It is described
Ratio valve group assembly is connect with solenoid valve block assembly, ECU electronic control unit and executive component respectively.
Further, the excavation Electrical Control inverted flux control system further includes pilot oil source, the pilot oil source into
Hydraulic fluid port A0 is connect with main pump assembly, and oil outlet B0 connects solenoid valve block assembly, and oil return inlet T 0 takes back hydraulic oil container.
Further, the executive component includes running motor, bucket cylinder, boom cylinder, rotary motor and dipper oil
Cylinder, each valve in the valve body valve rod assembly respectively with running motor, bucket cylinder, boom cylinder, rotary motor and dipper
Oil cylinder connection.
Further, the solenoid valve block assembly includes five switch electromagnetic valves and two proportioning valves, is respectively to switch
Solenoid valve A1, switch electromagnetic valve A2, switch electromagnetic valve A3, switch electromagnetic valve A4, proportioning valve A5, proportioning valve A6 and switch electromagnetic valve
A7, the switch electromagnetic valve A1 are connect with ratio valve group assembly, the oil outlet B0 of pilot oil source and hydraulic oil container respectively；Switch electricity
Magnet valve A1, switch electromagnetic valve A2, switch electromagnetic valve A3, switch electromagnetic valve A4, proportioning valve A5, proportioning valve A6 and switch electromagnetic valve A7
Each control mouth also connect with ECU electronic control unit, each oil return opening is connected with hydraulic tank；The oil of switch electromagnetic valve A2
Mouth is also connect with valve body valve rod assembly, and the hydraulic fluid port of switch electromagnetic valve A3 is also connect with running motor, the hydraulic fluid port of switch electromagnetic valve A4
It is also connect with rotary motor, the hydraulic fluid port of switch electromagnetic valve A7 is also connect with valve body valve rod assembly.
Further, angular transducer is installed on the bucket cylinder.
Further, the handle is electric control handle.
Compared with prior art, the utility model has the beneficial effects that
1, reduce labor intensity: because handle all uses electric control handle, steering force is greatly reduced compared with pilot handle, effectively
Reduce labor intensity；
2, it realizes that main valve stem is precisely controlled, complete machine is handling to be greatly improved: ratio is controlled by ECU electronic control unit
Valve, the secondary pressure needed, and then control bound bar are displaced, and are controlled compared to pilot handle, and proportioning valve is easy to get ideal
Secondary pressure curve, to realize the exact shift of main valve stem；
3, reduce master control valve body casting difficulty: the utility model eliminates the casting oil duct of straight line walking, main control valve
Casting difficulty reduces, and effectively reduces foundary loss rate；
4, it saves fuel oil: accessing proportioning valve in central by-passing valve control mouth, need to close central by-passing valve according to system, from
And realize Dual-pump flow-converging, operating efficiency is not only increased, the standby power singly pumped is also eliminated, to save fuel consumption；
5, reduce production cost: with the continuous development of electronic control technology, ECU electronic control unit cost is constantly reduced, also
Complicated mechanical pilot handle, treadle valve and section hydraulic pipeline are eliminated, the production cost of electric-control system constantly reduces；
6, in screed operation, by the setting angle sensor on bucket cylinder, the operating angle of scraper bowl is controlled, easily
Realize screed operation；
7, realization is unmanned, guarantees personal safety: the application of proportioning valve, and the automatic control of excavator easy to accomplish is led to
ECU electronic control unit control ratio valve events are crossed, by the way that program is set in advance, realization excavator is unmanned, particularly suitable for
Dangerous mining area operation.
Detailed description of the invention:
Fig. 1 is the principles of the present invention figure；
Fig. 2 is the partial enlarged view in Fig. 1 at K；
Fig. 3 is the partial enlarged view in Fig. 1 at H；
Fig. 4 is the partial enlarged view in Fig. 1 at G；
Fig. 5 A is the partial enlarged view in Fig. 1 at M；
Fig. 5 B is the schematic diagram of ratio valve group assembly in left valve barrel；
Fig. 6 is the axonometric drawing one of main control valve in the utility model；
Fig. 7 is the axonometric drawing two of main control valve in the utility model；
Fig. 8 is the inverted flux control systematic schematic diagram of the prior art；
Fig. 9 is the partial enlarged view in Fig. 8 at N；
Figure 10 is the partial enlarged view in Fig. 8 at Q；
Figure 11 is the schematic diagram of the oil duct removed in valve body valve rod assembly in the utility model.
In figure: 1, running motor；2, valve body valve rod assembly；3, inverted flux control valve；4, central by-passing valve；5, scraper bowl oil
Cylinder；6, boom cylinder；7, ECU electronic control unit；8, handle；9, solenoid valve block assembly；10, pilot oil source；11, main pump is total
At；12, engine assembly；13, hydraulic oil container；14, rotary motor；15, bucket arm cylinder；16, left end cap；17, ratio valve group is total
At；18, collaborate oil duct；19, right end cap；20, sebific duct；21, pedal pilot valve；22, right pilot valve；23, left pilot valve；24, it patrols
Collect valve block；25, electromagnetism valve block；26, linear rows walk oil duct；27, center bypass oil duct；28, central by-passing valve I；31, dipper one
Valve；32, multifunctional combination valve；33, revolution connection valve；34, one valve of swing arm；35, one valve of walking；36, straight line walking connection valve；37,
Walking bigeminy valve；38, swing arm bigeminy valve；39, scraper bowl joins valve；40, dipper bigeminy valve；51, the first proportioning valve；52, the second ratio
Valve；53, third proportioning valve；54, the 4th proportioning valve；55, the 5th proportioning valve；56, the 6th proportioning valve；57, the 7th proportioning valve；58,
8th proportioning valve；59, the 9th proportioning valve；60, the tenth proportioning valve；61, the 11st proportioning valve；62, the 12nd proportioning valve；63,
13 proportioning valves；64, the 14th proportioning valve；65, the 15th proportioning valve；66, the 16th proportioning valve；67, the 17th proportioning valve；
68, the 18th proportioning valve；69, the 19th proportioning valve；70, the 20th proportioning valve.
Specific embodiment:
Below by specific embodiment and in conjunction with attached drawing, the utility model is described in further detail.
Embodiment 1:
As shown in Figs 1-4, a kind of excavation Electrical Control inverted flux control system, including main pump assembly 11, hydraulic oil container 13, valve
The oil inlet of body valve rod assembly 2 and executive component, the main pump assembly 11 is connect with hydraulic oil container 13, oil outlet and valve body valve rod
Assembly 2 connects；The valve body valve rod assembly 2 is connect with executive component, further includes ECU electronic control unit 7, solenoid valve block assembly
9 and ratio valve group assembly 17, the main pump assembly 11 also connect with solenoid valve block assembly 9, the ECU electronic control unit 7 divides
It is not connect with handle 8 and solenoid valve block assembly 9；The ratio valve group assembly 17 respectively with solenoid valve block assembly 9, ECU electronics control
Unit 7 processed is connected with executive component.
Embodiment 2:
As shown in fig. 6-7, the valve body valve rod assembly 2 includes left valve barrel and right valve barrel, the both ends of left valve barrel and right valve barrel
Right end cap 19 at left end cap 16 and two is respectively fitted at two, the ratio valve group assembly 17 shares 20 proportioning valves, and every five
A proportioning valve is inserted into respectively on left end cap 16 and right end cap 19.The excavation Electrical Control inverted flux control system further includes guide
The oil inlet A0 of oil sources 10, the pilot oil source 10 is connect with main pump assembly 11, and oil outlet B0 connects solenoid valve block assembly 9, oil return
Mouth T0 takes back hydraulic oil container 13.
The valve body valve rod assembly 2 includes inverted flux control valve 3, central by-passing valve 4 and Ge Lian valve, and each valve that joins successively includes
One valve 31 of dipper, multifunctional combination valve 32, revolution connection valve 33, one valve 34 of swing arm, walking one valve 35, dipper bigeminy valve 40,
Scraper bowl joins valve 39, swing arm bigeminy valve 38, walking bigeminy valve 37 and straight line walking connection valve 36；Left valve barrel side and right valve barrel side are equal
Equipped with inverted flux control valve 3 and central by-passing valve 4, by taking right valve barrel as an example, the oil inlet and valve body valve rod of the center by-passing valve 4
Dipper bigeminy valve 40 in assembly 2 connects, and oil outlet is connect with inverted flux control valve 3, and the control mouth of central by-passing valve 4 passes through glue
Pipe 20 is connect with the proportioning valve A6 in solenoid valve block assembly 9.
The executive component includes running motor 1, bucket cylinder 5, boom cylinder 6, rotary motor 14 and bucket arm cylinder 15,
Each valve of the valve body valve rod assembly 2 respectively with running motor 1, bucket cylinder 5, boom cylinder 6, rotary motor 14 and dipper
Oil cylinder 15 connects.Bucket arm cylinder 15 is connect with one valve 31 of dipper and dipper bigeminy valve 40 respectively, and rotary motor 14 and revolution join
Valve 33 connects, and boom cylinder 6 connect with one valve 34 of swing arm and swing arm bigeminy valve 38 respectively, running motor 1 respectively with walk one
Join valve 35 and walking bigeminy valve 37 connects, bucket cylinder 5 is connect with scraper bowl connection valve 39, straight line walking connection valve 36 and main pump assembly 11
P2 variable pump oil outlet connection.
As shown in figure 3, solenoid valve block assembly 9 is an independent valve block, the solenoid valve block assembly 9 includes five switches
Solenoid valve and two proportioning valves are respectively switch electromagnetic valve A1, switch electromagnetic valve A2, switch electromagnetic valve A3, switch electromagnetic valve
A4, proportioning valve A5, proportioning valve A6 and switch electromagnetic valve A7, the switch electromagnetic valve A1 respectively with ratio valve group assembly 17, guide
The oil outlet B0 and hydraulic oil container 13 of oil sources 10 are connected；Switch electromagnetic valve A1, switch electromagnetic valve A2, switch electromagnetic valve A3, switch
Solenoid valve A4, proportioning valve A5, proportioning valve A6 and switch electromagnetic valve A7 each control mouth also connect with ECU electronic control unit 7,
Each oil return opening is connect with hydraulic oil container 13；The hydraulic fluid port of switch electromagnetic valve A2 is also connect with valve body valve rod assembly 2, switch electromagnetic valve
The hydraulic fluid port of A3 is also connect with running motor 1, and the hydraulic fluid port of switch electromagnetic valve A4 is also connect with rotary motor 14, switch electromagnetic valve A7's
Hydraulic fluid port is also connect with valve body valve rod assembly 2.
Main pump assembly 11 includes P1 variable pump, P2 variable pump and guide's gear pump；It is installed on the bucket cylinder 5
Angled sensor；The handle 8 is electric control handle；The main pump assembly 11 is connect with engine assembly 12.
As shown in figures 5a and 5b, ratio valve group assembly 17 includes 20 proportioning valves (51-70), first proportioning valve 51
Outlet A connect with central by-passing valve I 28；The outlet A of second proportioning valve 52 is connect with one end of the valve rod of dipper bigeminy valve 40,
The outlet A of third proportioning valve 53 is connect with the other end of the valve rod of dipper bigeminy valve 40；The outlet A and scraper bowl of 4th proportioning valve 54
Join one end connection of the valve rod of valve 39, the outlet A of the 5th proportioning valve 55 is connect with the other end of the valve rod of scraper bowl connection valve 39；6th
The outlet A of proportioning valve 56 is connect with one end of the valve rod of swing arm bigeminy valve 38, the outlet A and swing arm bigeminy valve of the 7th proportioning valve 57
The other end of 38 valve rod connects；The outlet A of 8th proportioning valve 58 is connect with one end of the valve rod of walking bigeminy valve 37, the 9th ratio
The outlet A of example valve 59 is connect with the other end of the valve rod of walking bigeminy valve 37；Outlet A and the straight line walking of tenth proportioning valve 60 join
One end of the valve rod of valve 36 connects；The outlet A of 11st proportioning valve 61 is connect with one end of the valve rod of one valve 35 of walking, and the tenth
The outlet A of two proportioning valves 62 is connect with the other end of the valve rod of one valve 35 of walking；The outlet A and swing arm of 13rd proportioning valve 63
One end of the valve rod of one valve 34 connects, and the other end of the valve rod of the outlet A and one valve 34 of swing arm of the 14th proportioning valve 64 connects
It connects；The outlet A of 15th proportioning valve 65 connect with one end of valve rod of revolution connection valve 33, the outlet A of the 16th proportioning valve 66 and
The other end connection of the valve rod of revolution connection valve 33；One end of the valve rod of the outlet A and multifunctional combination valve 32 of 17th proportioning valve 67
Connection, the outlet A of the 18th proportioning valve 68 are connect with the other end of the valve rod of multifunctional combination valve 32；19th proportioning valve 69 goes out
Mouth A is connect with one end of the valve rod of one valve 31 of dipper, the valve rod of the outlet A and one valve 31 of dipper of the 20th proportioning valve 70
Other end connection.The oil return inlet T of described one to 20 proportioning valves (51-70), which is connected in parallel, is followed by hydraulic oil container 13；Described one to
The oil inlet P of 20 proportioning valves (51-70) is connected in parallel to be connect with the switch electromagnetic valve A1 in solenoid valve block assembly 9 afterwards；Pass through
One to 20 proportioning valve (51-70) sends pressure signal to each valve.Other parts are same as Example 1.
The control process of the utility model is as follows:
As shown in Figure 1, it is assumed that complete machine is activated and in standby mode at this time, and each proportioning valve (51-70) is failure to actuate, starting
The flow that moment main pump assembly 11 exports all passes through sebific duct 20, central by-passing valve 4 in valve body valve rod assembly 2, reaches negative stream
Control valve 3, minus flow pressure signal FR and FL pressure increase rapidly from zero, and feed back the control mouth for arriving main pump assembly 11, this
When main pump swash plate pivot angle from being up to minimum, and maintain minimum swash angle always.
When executive component (running motor 1, bucket cylinder 5, boom cylinder 6, rotary motor 14 or bucket arm cylinder 15) needs
When quick acting, handle 8 (or footrest) is pulled to maximum angle, this electric signal is transmitted in ECU electronic control unit 7, passes through
CPU (central processing unit) judgement, ECU electronic control unit 7 export biggish electric current (or voltage) signal, this electric signal passes
The proportioning valve of needs movement is passed, to export higher secondary pressure, this pressure passes to main valve stem, pushes main valve stem movement
(completely in place), the oil liquid to come at this time from main pump assembly 11 all arrive at executive component, and center bypass oil duct 27 is without oil
Liquid, pressure signal is zero at inverted flux control valve 3, and the discharge capacity of P1 variable pump and P2 variable pump maximum is (assuming that pump power is not at this time
In the case where overload).
When executive component needs slow motion, handle 8 (or footrest) is pulled to a low-angle, this electric signal is transmitted to
In ECU electronic control unit 7, judged by CPU (central processing unit), ECU electronic control unit 7 exports a lower electric current
(or voltage) signal, this electric signal pass to the proportioning valve of needs movement, so that lower secondary pressure is exported, the transmitting of this pressure
To main valve stem, main valve stem movement (half-open semi-closure), the oil liquid to come at this time from main pump assembly 11 are pushed, a part reaches and executes member
Part, a part reach inverted flux control valve 3, pressure increases at inverted flux control valve 3, pressure by center bypass oil duct 27
Value depends on the opening size of main valve stem；At this point, the discharge capacity of P1 variable pump and P2 variable pump reduces.
As seen in figs. 8-10, when carrying out one action operation (such as single dipper motion), original P2 pump in the prior art is normal
Work, former P1 pump would be at low pressure standby mode, and former P1 pump can consume Partial Power.And automatically controlled minus flow shown in Fig. 1
In system, signal is issued by ECU electronic control unit 7, the central by-passing valve 4 in left valve barrel is controlled, bleed off circuit is turned off,
P1 variable pump has larger flow output at this time, by collaborating oil duct 18, enters scraper bowl connection valve 39, such P1 variable pump and P2 become
Amount pump interflow enters bucket cylinder 5, not only increases operating efficiency, also reduces fuel consumption.
Such as the inverted flux control systematic schematic diagram that Fig. 8-10 is the prior art, the utility model that compares does not use pedal
Pilot valve 21, right pilot valve 22, left pilot valve 23 and logic valve block 24, and electromagnetism valve block 25 is changed to solenoid valve block assembly 9,
As shown in figure 11, linear rows are eliminated and walk oil duct 26 (black intensification line portion), effectively reduce foundary loss rate and reduction
Master control valve body casts difficulty.
Main control valve includes valve body valve rod assembly 2, left end cap 16, right end cap 19, proportioning valve (51-70) and proportioning valve in text
Group assembly 17.
In text signified proportioning valve refer to one to 20 proportioning valve (51-70) or in which one of.
Claims (6)
1. a kind of excavation Electrical Control inverted flux control system, including main pump assembly (11), hydraulic oil container (13), valve body valve rod assembly
(2) it is connect with executive component, the oil inlet of the main pump assembly (11) with hydraulic oil container (13), oil outlet and valve body valve rod assembly
(2) it connects；The valve body valve rod assembly (2) connect with executive component, it is characterised in that: further includes ECU electronic control unit
(7), solenoid valve block assembly (9) and ratio valve group assembly (17), the main pump assembly (11) also connect with solenoid valve block assembly (9)
It connects, the ECU electronic control unit (7) connect with handle (8) and solenoid valve block assembly (9) respectively；The ratio valve group assembly
(17) it is connect respectively with solenoid valve block assembly (9), ECU electronic control unit (7) and executive component.
2. excavation Electrical Control inverted flux control system according to claim 1, it is characterised in that: the excavation Electrical Control is negative
Flow control system further includes pilot oil source (10), and the oil inlet A0 of the pilot oil source (10) is connect with main pump assembly (11),
Oil outlet B0 connects solenoid valve block assembly (9), and oil return inlet T 0 takes back hydraulic oil container (13).
3. excavation Electrical Control inverted flux control system according to claim 2, it is characterised in that: the executive component includes
Running motor (1), bucket cylinder (5), boom cylinder (6), rotary motor (14) and bucket arm cylinder (15), the valve body valve rod are total
It is oily with running motor (1), bucket cylinder (5), boom cylinder (6), rotary motor (14) and dipper respectively at each valve in (2)
Cylinder (15) connection.
4. excavation Electrical Control inverted flux control system according to claim 3, it is characterised in that: the solenoid valve block assembly
(9) include five switch electromagnetic valves and two proportioning valves, be respectively switch electromagnetic valve A1, switch electromagnetic valve A2, switch electromagnetism
Valve A3, switch electromagnetic valve A4, proportioning valve A5, proportioning valve A6 and switch electromagnetic valve A7, the switch electromagnetic valve A1 respectively with ratio
Valve group assembly (17), the oil outlet B0 of pilot oil source (10) and hydraulic oil container (13) connection；Switch electromagnetic valve A1, switch electromagnetic valve
A2, switch electromagnetic valve A3, switch electromagnetic valve A4, proportioning valve A5, proportioning valve A6 and switch electromagnetic valve A7 each control mouth also with
ECU electronic control unit (7) connection, each oil return opening are connect with hydraulic oil container (13)；The hydraulic fluid port of switch electromagnetic valve A2 also with valve
Body valve rod assembly (2) connection, the hydraulic fluid port of switch electromagnetic valve A3 are also connect with running motor (1), and the hydraulic fluid port of switch electromagnetic valve A4 is also
It is connect with rotary motor (14), the hydraulic fluid port of switch electromagnetic valve A7 is also connect with valve body valve rod assembly (2).
5. excavation Electrical Control inverted flux control system according to claim 4, it is characterised in that: in the bucket cylinder
(5) angular transducer is installed on.
6. excavation Electrical Control inverted flux control system according to claim 5, it is characterised in that: the handle (8) is electricity
Control handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820839806.3U CN208251214U (en) | 2018-05-31 | 2018-05-31 | Excavate Electrical Control inverted flux control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820839806.3U CN208251214U (en) | 2018-05-31 | 2018-05-31 | Excavate Electrical Control inverted flux control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208251214U true CN208251214U (en) | 2018-12-18 |
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ID=64652256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201820839806.3U Active CN208251214U (en) | 2018-05-31 | 2018-05-31 | Excavate Electrical Control inverted flux control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108589822A (en) * | 2018-05-31 | 2018-09-28 | 山东临工工程机械有限公司 | Excavate Electrical Control inverted flux control system |
-
2018
- 2018-05-31 CN CN201820839806.3U patent/CN208251214U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108589822A (en) * | 2018-05-31 | 2018-09-28 | 山东临工工程机械有限公司 | Excavate Electrical Control inverted flux control system |
| CN108589822B (en) * | 2018-05-31 | 2023-09-22 | 山东临工工程机械有限公司 | Electric control negative flow control system of excavator |
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