CN205686271U - A kind of removable engineering is for electric car - Google Patents
A kind of removable engineering is for electric car Download PDFInfo
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- CN205686271U CN205686271U CN201620653970.6U CN201620653970U CN205686271U CN 205686271 U CN205686271 U CN 205686271U CN 201620653970 U CN201620653970 U CN 201620653970U CN 205686271 U CN205686271 U CN 205686271U
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Abstract
A kind of removable engineering is for electric car, for powering to external electric equipment, especially for power supplies such as the engineering machinery worked in the wild, agricultural machinery.Described one may move engineering and includes for electric car: movably car body, election power generation devices, power-converting device and cable reel installation are installed on car body, power-converting device regulates the electric power that described election power generation devices produces, and it being delivered to external electric equipment by cable reel installation, cable reel installation passes through reel folding and unfolding cable；Signal receives emitter and controller, and signal receives the instruction of transmitter receipt external electric equipment, and controller controls the electric power needed for power-converting device output external electric equipment according to instruction.This utility model can be automatically adjusted cable length makes external electric equipment work in certain stroke range, rotation work ability is good, ambient adaptability is high, especially at some petroleum shortages, or becomes apparent from sound pollution, pollution from exhaust emission exclusive work area advantage.
Description
Technical field
This utility model belongs to engineering mechanical device technical field, relates to engineering machinery technology, communication technology, controls skill
Art.Specifically, be a kind of can be that the engineering mechanical device that works within the specific limits provides the one of electric power to may move work
Journey is for electric car.
Background technology
Present stage determine most of engineering machinery, farm machinery all with fuel engines drive, its advantage is mobility
By force, cross-country ability is high.But it is high to have engine noise simultaneously, exhaust pollution is serious, use cost and the high defect of maintenance cost.With
Country and advocate use clean energy resource, and the development of machinery correlation technique, using electricity as the engineering mechanical device of power source by
Gradually become a kind of development trend.
Having occurred in that the electronic engineering machinery such as electric excavator in the world today, it is without discharge, low noise, low use
The feature of cost is not available for Traditional project machinery.Although it is with the obvious advantage, but it is restricted by condition of power supply, at some
Can not be used widely because being difficult to find that suitable power supply when environment such as field, desert work.The most
There is the one movably generated electricity by fuel electric generator to may move engineering and supply electric car, but its volume is big, has exhaust pollution.Also have and make
For the battery of Emergency Power during disaster for electric car, although non-exhaust emission, but volume is big, and mobility is poor, and cost is high, purposes
Narrow.
Utility model content
This utility model problem of the prior art to be solved, the one visualized may move engineering can be well for electric car
Overcome the problems referred to above, greatly promote the motorized of engineering machinery, and this power supply unit is easily achieved centralization, intelligent pool
Management controls, can more efficiently, reliably and securely fulfil assignment.
For reaching above-mentioned purpose, the technical solution adopted in the utility model is as follows:
A kind of removable engineering is for electric car, and for powering to external electric equipment, described one may move engineering for electric car
Including:
Movably car body, described car body is provided with election power generation devices, power-converting device and cable reel installation,
Described power-converting device regulates the electric power that described election power generation devices produces, and is delivered to outside use by cable reel installation
Electricity equipment, cable reel installation passes through reel automatic deploying and retracting cable, and its automatic deploying and retracting can be realized by wind spring or motor；
Described one may move engineering and also includes for electric car:
Signal receives emitter and controller, and described signal receives the instruction of transmitter receipt external electric equipment, described
Controller controls the electric power needed for power-converting device output external electric equipment according to instruction.
Preferably, described cable reel installation is provided with sensing device, for detecting electricity remaining in cable reel installation
Cable length；Described sensing device is provided with:
Alarm device, is used for when cable length deficiency remaining during sensing device detects cable reel installation, outwards
Portion sends alarm signal；
Emergency braking device, sends for cable length deficiency remaining in sensing device detects cable reel installation
After alarm signal, when continuing stretching cable to restriction length, it is automatically stopped the electric power output of election power generation devices.
Preferably, the cable output end of described cable reel installation is provided with cable tension sensing device, when cable is by the external world
When pulling force exceedes certain value, the cable drum in draw off gear rotates to the direction that cable is released, when external tensile force is less than setting
During value, cable drum rotates to cable shrinkage direction.Meanwhile, cable tension sensing device also makes cable remain unsettled
State.
Preferably, the cable output end of described cable reel installation is provided with guider, makes cable reel installation in folding and unfolding
Marshalling during cable.
Preferably, described cable reel installation is provided with brake unit, the automatic deploying and retracting electricity of cable reel installation can be stopped
The action of cable.
Preferably, described cable reel installation lies against the described a kind of removable engineering top for electric car, and cable
In draw off gear, the rotary shaft of reel is perpendicular to a kind of removable engineering for electric car horizontal plane.
Preferably, in described cable reel installation, the height of reel is less than the octuple of cable size.
Preferably, described election power generation devices can be electromotor or accumulator, and during for accumulator, being provided with charger will outward
Portion's electric power is accumulator charging.
Preferably, it is provided with electric quantity monitoring device, for the dump energy of monitoring accumulator in real time and is sent out by signal reception
Emitter is sent to external electric equipment signal.Certainly, except dump energy, also can monitor in real time and send the information such as temperature.
Preferably, the described signal receiving/transmission device supplied on electric car carries out signal and instruction with electrical equipment by radio wave
Mutual transmission.
Preferably, described a kind of removable engineering for electric car be moved through external equipment traction drive.
Preferably, described a kind of removable engineering is independently driven for the electric power being moved through election power generation devices generation of electric car
Dynamic.
The beneficial effects of the utility model are: use cost and maintenance cost are low, and volume is little, and mobility is good, and purposes is wide,
Can be automatically adjusted cable length makes external electric equipment work in certain stroke range, and rotation work ability is good, and environment is fitted
High by property, signal communication can be carried out with front truck, it is ensured that cable secure uses, in particular by accumulator at some oil gas simultaneously
The work area advantage of shortage becomes apparent from, and has noise low when densely populated municipal construction, without the advantage of exhaust pollution.
Accompanying drawing explanation
Fig. 1 is the structural representation that can not independently drive for electric car of the present utility model.
Fig. 2 is the structural representation that can independently drive for electric car of the present utility model.
Fig. 3 is that this utility model is for the radial cross-section of guider in the cable reel installation of electric car.
Fig. 4 is that this utility model is for the axial sectional view of guider in the cable reel installation of electric car.
In figure: 1, car body；2, accumulator；3, power-converting device；4, cable reel installation；4.1, cable；4.2, reel；
4.3, guider；4.4, brake unit；5, signal receives emitter；6, controller；7, charger；8, external power source；9, electricity
Electrical automobile；9.1, motor；9.2, signal receiving/transmission device；9.3, device is controlled.
Detailed description of the invention
Below by detailed description of the invention and accompanying drawing, this utility model is further described.
Embodiment one: as it is shown in figure 1, a kind of removable engineering is for electric car, it is moved through external equipment traction drive, bag
Include: movably car body 1, car body 1 is provided with election power generation devices, power-converting device 3 and cable reel installation 4, this reality
Executing in example, election power generation devices is accumulator 2, simultaneously equipped with charger 7, can be electric power storage with external power source 8 needs when
Charging in pond 2, power-converting device 3 regulates the electric power that accumulator 2 produces, and is delivered to outside electricity consumption by cable reel installation 4
Equipment, cable reel installation 4 is by reel 4.2 automatic deploying and retracting cable 4.1, and cable reel installation 4 lies against a kind of removable work
Journey is for the top of electric car, and in cable reel installation 4, the rotary shaft of reel 4.2 is perpendicular to a kind of removable engineering for electric car water
Plane；Being also equipped with signal in car body 1 and receive emitter 5 and controller 6, signal receives emitter 5 and receives external electric equipment
Instruction, controller 6 according to instruction control power-converting device 3 export the electric power needed for external electric equipment, such as the electricity specified
Power frequency, voltage or electric current.
Wherein, cable reel installation 4 is provided with sensing device, for detecting cable 4.1 remaining in cable reel installation 4
Length；Being additionally provided with alarm device and emergency braking device in sensing device, alarm device is for cable being detected when sensing device
During remaining in draw off gear 4 cable 4.1 curtailment, sending alarm signal to outside, emergency braking device is for when sensing
After device detects that cable 4.1 curtailment remaining in cable reel installation 4 sends alarm signal, continue stretching cable 4.1
To when limiting length, it is automatically stopped the electric power output of accumulator 2.Alarm signal both can be by a kind of removable engineering for electric car
Body sends, it is also possible to receiving emitter 5 by signal and send to external electric equipment, signal includes the form such as sound, light.
Wherein, cable reel installation 4 has cable tension sensing device, when cable 4.1 is exceeded certain value by external tensile force
Time, the reel 4.2 in cable reel installation 4 rotates to the direction that cable 4.1 is released, when external tensile force is less than setting value, and volume
Cylinder 4.2 rotates to cable 4.1 shrinkage direction.And cable 4.1 outfan of cable reel installation 4 is provided with guider 4.3, makes
Cable reel installation 4 is marshalling when folding and unfolding cable 4.1.
Additionally, cable reel installation 4 is provided with brake unit 4.4, cable reel installation 4 can be stopped needing when
The action of automatic deploying and retracting cable 4.1, especially can prevent cable 4.1 fast when cable 4.1 outfan departs from external electric equipment
Speed is drawn back and is caused a hidden trouble.
Stablizing when moving for a kind of removable engineering of guarantee for electric car and work, reel 4.2 in cable reel installation 4
Highly less than the octuple of cable 4.1 diameter.
It is also equipped with electric quantity monitoring device at moveable car body 1, is used for the dump energy of monitoring accumulator 2 in real time and leads to
Cross signal reception 5 signals of emitter and be sent to external electric equipment, allow an operator to notice at any time charge condition.
When outside electromechanical, time as to be started working in the manipulator on excavator, need first for the cable on electric car
4.1 receiving ends receiving excavator, then open for the control switch on electric car, make to be in holding state for electric car.Then return
In the driver's cabin of excavator, accept discharger by the signal of excavator end and receive emitter 5 to the signal for electric car end
Send electric power output order.Such as, excavator is 3 phase asynchronous generators, it is possible to require that regulation is for the electric power of electric car
Converting means 3, it is common that converter, it is provided that required power frequency, and determine the motor speed on excavator, make excavator
Can the most arbitrarily regulate his operating rate.
Often converter is placed in electrical equipment on general electric machinery, and provides standard from external power source 8
Electric power.But due to the working environment very severe of engineering machinery, general converter is difficult to meet the requirement of this working environment, institute
With, high performance electronic engineering machinery reality is extremely difficult.And this patent is put into a kind of removable engineering converter
For, on electric car, being easily controlled than on excavator for the environment on electric car, it is possible to provide the arbitrary form required for excavator,
The electric power of arbitrary size, and make the power performance of excavator more preferable.
After excavator manipulator starts working, machinery to be operated forward-reverse frequently, or left rotation and right rotation, cable 4.1
Also can be pulled out therewith a little while be decontroled a little while, for preventing cable 4.1 from being trampled by machinery in the work process of excavator, or
Person is wrapped on the barrier of centre, will be according to the duty of excavator for the cable reel installation 4 on electric car, handle in time
Cable 4.1 is regained or is released.A kind of typical folding and unfolding mode is with scroll spring band movable reel 4.2, around cable on reel 4.2
4.1.When excavator is in time moving away from the direction for electric car, and the motive force of excavator is far longer than the spring of turbine spring
Power, cable 4.1 will be drawn out；When excavator moves to the direction close for electric car, cable 4.1 is the most released, and spring is just
Cable 4.1 can be automatically retracted.
In order to make cable 4.1 not contact or contact less ground as far as possible, and reduce cable 4.1 by the abrasion in movement,
It is optimum position that twisted and released of the cable line apparatus 4 is placed on the top for electric car.If the rotary shaft allowing cable reel installation 4 is placed on confession
The parallel direction of electric car is also possible, but the most all compares slightly because of the cable 4.1 for engineering machinery work, and this is accomplished by
Reel 4.2 has bigger diameter, so will result in the center of gravity for electric trolley body 1 too high, and affects the mobility for electric car.
So, cable reel installation 4 is made flat pattern, allows rotary shaft be perpendicular to the ground level for electric car, be cable reel installation 4
Optimum position.When reel 4.2 is horizontal, the excessive height of reel 4.2 should not be allowed, otherwise due to cable 4.1 self gravity and
Cause cable 4.1 to be wrapped in reel 4.2 phenomenon below too much, and be not easy cable 4.1 to be neatly wound around.Can not neatly twine
Around, cable reel installation 4 is just not easy stable work, and therefore the Breadth Maximum of reel 4.2 is less than 8 times of cable 4.1 diameter.
In real work, excavator cannot limit, in order to be able to make cable 4.1 in office with the relative position for electric car
During orientation, the circle that cable 4.1 can be neat, on reel 4.2, arranges in cable 4.1 exit of cable reel installation 4 and leads
To device 4.3, no matter its effect is to make excavator in any orientation for electric car, can be maintained at when cable 4.1 enters rotating disk
In same angle, thus can guarantee that cable 4.1 can neat being wrapped on reel 4.2.As shown in Figure 3 and Figure 4, it is to guide dress
Putting a kind of typical structure of 4.3, it is made up of two groups of rolling wheel supports of front and back, and each rolling wheel support is made up of 4 rollers, makes cable
4.1 enter guider 4.3 the most in any direction, with guider 4.3 all in Structure deformation, and do not produce friction；This
Leaving a certain distance L between two groups of rollers, this distance L is typically no less than 1.0 times of cable 4.1 diameter D.This guides dress
Put 4.3 and ensure that cable 4.1 is always at metastable angle when entering cable reel installation 4, and ensure cable 4.1
Neat winding.
When manipulator is operated in driver's cabin, often cannot notice the position for electric car, when excavator walks too
Far, and beyond for electric car available cable 4.1 length time, cable 4.1 sensing device for electric car will send alarm signal
Number, and the manipulator alerting excavator notes working range, or a kind of removable engineering is for the position of electric car.But cable at this moment
4.1 remaining lengths also have certain surplus, can allow and excavate the work that tractor driver completes to be carrying out.This length is to have
Limit, if excavator works on and exceedes this limit, will the opening of force disconnect electric power output apparatus for electric car
Close, and cut off the power of excavator, it can not be moved on, be not pulled off for the cable 4.1 of electric car with protection.Realize this
The simplest method of function of sensing device is to install two travel switches, says when the two travel switch pushed down by cable 4.1
Bright cable 4.1 also has surplus, when cable 4.1 is gradually released and disengaged first travel switch, illustrates that the residual of cable 4.1 is opened
Begin deficiency, i.e. sends out warning；When second travel switch is disengaged, electric power output apparatus is just automatically cut off.
Different from electrical network for available electric power on electric car, there is certain limit, it is impossible to infinitely use.Reduce for electric car
Electric quantity consumption, extending for time of electric car is also one of key of excavator portable high workload efficiency.Real-time for electric car
Ground can help manipulator to adjust operational approach in time to accumulator 2 residual excavated in tractor driver reports for electric car, it is contemplated that can work
Make the time.A kind of attainable method is exactly by controller 6 and letter accumulator 2 voltage of power-converting device 3 input
Number reception emitter sends out 5 to excavator.
When excavator end-of-job, or when supplying the electricity of electric car to be finished, it is necessary to cable 4.1 is escaped from excavator
Come, then cable 4.1 is recovered in cable reel installation 4, is then drawn charging.But as it was previously stated, reel 4.2 is probably
Useful scroll spring is power, and because cable 4.1 is the thickest but also long, the contractility of spring is the biggest.So, when cable
4.1 free when coming from excavator, and cable 4.1 can lose suddenly pulling force, and wind spring can be with at full speed the receiving to cable of cable 4.1
Put in device 4 and regain.The withdrawal that the thickest cable 4.1 is at full speed, it is easy to be thrown on people or the article of surrounding, and cause not
Necessary damage.For solving this problem, cable 4.1 is being received electrical equipment, or cable 4.1 is being freed from electrical equipment
When coming, need a brake unit 4.4 is installed.One feasible mode is to install one on cable reel installation 4 to be similar to
The device of latch, need not allow volume, and 4.2 just plug latch when rotating, and when allowing that it rotates, just latch are extracted, this
The plug of individual latch can be with manually, it is also possible to uses magnet control.
After cable 4.1 is reclaimed by cable reel installation 4, just it is returned to the state that can move freely for electric car, because it
Self is with charger 7, charger 7 can external power source 8 as grid power become and can charge to accumulator 2
High direct voltage electric power, charging current can also arbitrarily adjust.So moving to any place having power supply for electric car, can
Charge for it.Additionally, the power supply etc. such as solar energy or wind power generation can also use.
Charge complete after, may be at the most again holding state for electric car, for any motor that there is a need to power reguirements
Tool provides electric power.
Embodiment two: as in figure 2 it is shown, be with the difference of embodiment one, a kind of removable engineering is led to for the movement of electric car
The electric power crossing the generation of election power generation devices i.e. accumulator 2 independently drives, and specifically, a kind of removable engineering is for the car body of electric car
1 is electric automobile 9, and the electric power of its motor 9.1 comes from for the power-converting device 3 on electric car, and operating electric vehicle 9 moves
Time, controlling device 9.3 can send instruction by the signal receiving/transmission device 9.2 on electric automobile 9, and the signal for electric car receives transmitting
After device 5 receives, allow the power-converting device 3 for electric car provide the electric power of frequency required for electric automobile 9, and drive electric automobile
9 move.But electric automobile 9 is powered and is powered can not carry out to external electric equipment in systems, and electric automobile 9 is enjoyed simultaneously
Have more higher priority control than external equipment.
Embodiment three: do not emphasize the signal connected mode for electric car Yu electric car in embodiment one and embodiment two,
Wired connection can be used, it is also possible to connect with wireless telecommunications.But it practice, because need with cable reel installation 4 between two cars
Carry out folding and unfolding cable 4.1, so, if the most additional signal transmssion line, cable 4.1 folding and unfolding will be extremely difficult.Feasible side
Method has two kinds, and one is to add one group of holding wire in the middle of cable 4.1 line of transmission electric power, both sides is needed the signal of transmission become several
Word train of signal, alternating transmission, after passing to the other side, then this digital string signal is decomposed into the instruction controlling distinct device.Ratio
As, the speed-regulating signal of manipulator on excavator, after being transferred to supply on electric car, just it is fed to converter, and changes converter
The setting value of output frequency.For the cable 4.1 curtailment alarm signal on electric car, by time on conduction excavator, will be sent
On Mel device, and Mel device is allowed to give a warning.
Another kind is to transmit with wireless communication mode, i.e. needs a plurality of signals spread out of to line up train of signal both sides, logical
Cross radio wave and pass to the other side, and accept the signal that the other side is transmitted.Then the same with aforementioned wire transmission, the train of signal being subject to
Disassemble and control relevant device.The most both can realize the mutual Control function of height, the most not affect both mutual fortune
Dynamic.
Implement row four: the cable reel installation 4 in above-described embodiment is for the example being used as power with scroll spring, it is also possible to
Make the driving power of reel 4.2 of motor, and by the moment of torsion suffered by perception motor judge motor be should take-up or
Unwrapping wire.Certainly the retractable cable of motor also can be determined by the control of people.
Embodiment five: combine shown in Fig. 1, the difference with embodiment two is, for electric car oneself not Tape movement power, but car
Front portion have one can trailed device.So can be led by the machinery of any driving power having driving power for electric car
Draw.Such as automobile, truck, it is also possible to be with the traction of electromechanical itself.Such as excavator can also be as hitching machinery, in tow
Walk back and forth in power supply for electric car.So there is no need to there is special actuating unit for electric car, and reduce the manufacture for electric car
Cost.
Except accumulator 2 structure among above-mentioned several embodiments, election power generation devices of the present utility model can also be
Electromotor, such as fuel electric generator, this kind of structure avoids the need for charger 7 and external power source 8, accordingly, power-converting device 3
By control be electromotor power control output electric power, electric quantity monitoring device can also change oil mass monitoring device into.
The foregoing is only specific embodiment of the utility model, but architectural feature of the present utility model is not limited to
This, this utility model may be used on the product that is similar to, any those skilled in the art in field of the present utility model, institute
Change or the modification made all are contained among the scope of the claims of the present utility model.
Claims (10)
1. removable engineering is for an electric car, for powering to external electric equipment, it is characterised in that described one may move work
Journey includes for electric car:
Movably car body, described car body is provided with election power generation devices, power-converting device and cable reel installation, described
Power-converting device regulate described election power generation devices produce electric power, and by cable reel installation be delivered to outside electricity consumption set
Standby, cable reel installation passes through reel automatic deploying and retracting cable；
Described one may move engineering and also includes for electric car:
Signal receives emitter and controller, and described signal receives the instruction of transmitter receipt external electric equipment, described control
Device controls the electric power needed for power-converting device output external electric equipment according to instruction.
One the most according to claim 1 may move engineering for electric car, it is characterised in that: described cable reel installation sets
There is sensing device, for detecting cable length remaining in cable reel installation；
Described sensing device is provided with:
Alarm device, for, during when cable length deficiency remaining during sensing device detects cable reel installation, sending out to outside
Go out alarm signal；
Emergency braking device, sends warning for cable length deficiency remaining in sensing device detects cable reel installation
After signal, when continuing stretching cable to restriction length, it is automatically stopped the electric power output of election power generation devices.
One the most according to claim 1 may move engineering for electric car, it is characterised in that: the electricity of described cable reel installation
Cable outfan is provided with cable tension sensing device, the coil of cable when cable is exceeded certain value by external tensile force, in draw off gear
Cylinder rotates to the direction that cable is released, and when external tensile force is less than setting value, cable drum rotates to cable shrinkage direction.
One the most according to claim 1 may move engineering for electric car, it is characterised in that: the electricity of described cable reel installation
Cable outfan is provided with guider, makes cable reel installation marshalling when folding and unfolding cable.
One the most according to claim 4 may move engineering for electric car, it is characterised in that: described cable reel installation sets
There is brake unit, the action of the automatic deploying and retracting cable of cable reel installation can be stopped.
One the most according to claim 1 may move engineering for electric car, it is characterised in that: described cable reel installation keeps flat
In described a kind of removable engineering for the top of electric car, and in cable reel installation, the rotary shaft of reel is perpendicular to one and can move
Journey of starting building is less than the octuple of cable size for the height of reel in electric car horizontal plane, and described cable reel installation.
7. may move engineering for electric car according to the one described in any one of claim 1-6, it is characterised in that: described electric power occurs
Device can be accumulator, and to be provided with charger and be transformed into by outer power voltage can be the voltage of accumulator charging.
One the most according to claim 7 may move engineering for electric car, it is characterised in that: it is provided with electric quantity monitoring device, uses
In the dump energy of monitoring accumulator in real time and by signal reception emitter, signal is sent to external electric equipment.
One the most according to claim 1 may move engineering for electric car, it is characterised in that: described for the signal receipts on electric car
Transmitting apparatus and electrical equipment carry out the mutual transmission of signal and instruction by radio wave.
One the most according to claim 7 may move engineering for electric car, it is characterised in that: described one may move engineering
The electric power being moved through election power generation devices generation for electric car independently drives.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620653970.6U CN205686271U (en) | 2016-06-28 | 2016-06-28 | A kind of removable engineering is for electric car |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620653970.6U CN205686271U (en) | 2016-06-28 | 2016-06-28 | A kind of removable engineering is for electric car |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106004618A (en) * | 2016-06-28 | 2016-10-12 | 杭州蓝力电动科技有限公司 | Engineering power supply vehicle |
| CN107465152A (en) * | 2017-09-22 | 2017-12-12 | 国网河南省电力公司新乡供电公司 | A kind of drafting tool of power cable layer application |
| CN109546700A (en) * | 2018-09-14 | 2019-03-29 | 威视纳股份有限公司 | A kind of display cart and its power supply system and method for supplying power to |
-
2016
- 2016-06-28 CN CN201620653970.6U patent/CN205686271U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106004618A (en) * | 2016-06-28 | 2016-10-12 | 杭州蓝力电动科技有限公司 | Engineering power supply vehicle |
| CN107465152A (en) * | 2017-09-22 | 2017-12-12 | 国网河南省电力公司新乡供电公司 | A kind of drafting tool of power cable layer application |
| CN109546700A (en) * | 2018-09-14 | 2019-03-29 | 威视纳股份有限公司 | A kind of display cart and its power supply system and method for supplying power to |
| CN109546700B (en) * | 2018-09-14 | 2021-12-21 | 深圳市云谷时代网络技术有限公司 | Display cart and power supply system and power supply method thereof |
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