CN101711221A - Full hydraulic AC electrical forklift - Google Patents
Full hydraulic AC electrical forklift Download PDFInfo
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- CN101711221A CN101711221A CN200880020043A CN200880020043A CN101711221A CN 101711221 A CN101711221 A CN 101711221A CN 200880020043 A CN200880020043 A CN 200880020043A CN 200880020043 A CN200880020043 A CN 200880020043A CN 101711221 A CN101711221 A CN 101711221A
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- 239000012530 fluid Substances 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 8
- 238000012806 monitoring device Methods 0.000 claims description 7
- 239000002828 fuel tank Substances 0.000 claims description 3
- 230000006837 decompression Effects 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000002463 transducing effect Effects 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/24—Electrical devices or systems
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Fluid-Pressure Circuits (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
A kind of full hydraulic AC electrical forklift, comprise hydraulic efficiency pressure system and electric system, the steering hardware and the travel driving unit of the accelerator controlled hydraulic system by electric system, the hoisting of electric system, tilt switch drive the gear type pump of hydraulic efficiency pressure system and further through multiway valve control inclined lift device through alternating-current controller control alternating current dynamo.The continuous speed regulation system that forms by alternating-current controller, alternating current dynamo and accelerator, make running gear from a slow speed to quick running state freely, stable, reliable, and alternating-current controller is designed to realize that the hydraulic moving infinite speed variation can be realized hydraulic lifting again, the control of tilting; With single alternating current dynamo is that core combines electric system and Design of Hydraulic System, to solve that the electric current that fork truck exists in the prior art is big, power consumption is big, temperature is high and technical matters such as connection line complexity.
Description
Full hydraulic AC electrical forklift technical field
The present invention relates to electri forklift, specifically full hydraulic AC electrical forklift.
Background technology
Existing hydraulic electric fork truck（Such as No. 4 Chinese invention patents of ZL01125120. of the applicant, Publication No. CN1405079A) the electrical principle design form of system is operated with DC controller control direct current generator, 200610050420. No. 6 Chinese invention patent applications " full hydraulic electric forklift hydraulic system " of the fork truck of such technical scheme in the applicant（Publication No.：) and 200610050421. No. 0 Chinese invention patent applications " full hydraulic electric forklift electric system " CN101058395A（Publication No.：CN101058396A addressed in), not only transmission efficiency is low for this drive form, noise is big, and carbon brush is easy to wear in motor often to safeguard replacing, and cause complete machine running current big, power consumption is big, and temperature is high, the defect such as fork truck run time is relatively short；And the control of motor is realized by DC controller, this electric control method can not carry out effective speed Control to motor, heat drop control can not be carried out to the temperature rise of motor and heat rises and protected, for example：There is no variable frequency vector speed control, without safety sensing control etc.）.
Content of the invention the technical problem to be solved in the present invention and the technical assignment proposed are that the electric current for overcoming the fork truck of prior art to exist is big, power consumption is big, there is provided a kind of new full hydraulic AC electrical forklift for temperature height and the complicated defect of connection line.Therefore, the present invention uses following technical scheme： .
Full hydraulic AC electrical forklift, including hydraulic system and electrical system, it is characterized in that：
The hydraulic system includes：
Inclined lift device that is main being made up of lift oil tank and dump ram and being controlled by banked direction control valves, the transfer being mainly made up of steering gear and steering cylinder,
Travel driving unit that is being made up of hydraulic motor and the hydraulic motor brake being arranged on hydraulic motor and hydraulic motor flow speed control valve and being controlled by a control valve and a commutation brake valve, and
One gear pump, the hydraulic energy point two-way output that the gear pump is produced：All the way through the transfer and described inclined lift device described in a preferential pottery supply, another Lu Jingyi pressure switching valve leads to the drive device；
Described electrical system includes：
Battery feed, key switch, an alternating current generator with exchange sensing and controlling system, '
Connected using battery feed as the energy by emergency stop switch and high voltage power supply and the output of low-tension supply two-way are divided into by DC-DC transformers：Low-tension supply through the key switch connect exchange sensing and controlling system, the alternating-current controller that is mainly used in controlling the alternating current generator and connect the instrument being connected with the alternating-current controller, temperature sensor,
High voltage power supply connects the alternating-current controller by fuse and main contactor through being controlled by the alternating-current controller connects the alternating current generator, accelerator and raising, tilt switch are connected with the alternating-current controller, and connects load-relay, insulation monitoring device, heat drop control, electronic protection grid, security function switch；
By transfer and travel driving unit described in the Accelerator control, described raising, tilt switch drive gear pump and further through banked direction control valves control inclined lift device through alternating-current controller control alternating current generator.
During work, battery feed is through DC-DC transformers to key switch, and when key switch disconnecting circuit, electrical system and hydraulic system are stopped.When key switch connects circuit, high voltage power supply connects alternating-current controller, main contactor adhesive：If now connecting accelerator, alternating current generator is connected by alternating-current controller output, at this moment alternating current generator is in the fork truck idling mode set by alternating-current controller, with the acceleration of accelerator（Pedal plate type accelerator is such as trampled with pin）, the rotating speed of alternating current generator is by low speed to high-speed cruising, and the operating of drive gear pump works for transfer, travel driving unit；If now making accelerator in a state of nature（Accelerator disconnecting circuit）, fork truck is in idling mode within the time that alternating-current controller is set, until setting time is finished, system power supply is closed；If now connecting raising, tilt switch, alternating current generator operation is controlled to drive gear pump operating to be worked for inclined lift device by alternating-current controller.
It is an advantage of the invention that：
1st, the continuous speed regulation system formed by alternating-current controller, alternating current generator and accelerator, make running gear from a slow speed to quick running status freely, stably, reliably, and alternating-current controller is designed to realize that hydraulic moving stepless speed regulation can realize hydraulic lifting, inclination control again（Hydraulic moving stepless speed regulation is realized by accelerator connection alternating-current controller controlled motor drive gear pump operating, then raising, the inclination control that alternating-current controller controlled motor drives gear pump operating realization to fork truck are connected by raising, tilt switch）.
2nd, system is only at idling mode upon actuation（A minimum speed is set in alternating-current controller program, is worked at the low rotational speed by alternating-current controller controlled motor）, make the transfer of hydraulic system ensures energy resource supply within a certain period of time, time-delay closing when not working, and system capacity, energy consumption reduction are not wasted so.
3rd, due to being single motor stepless speed regulation work, in addition motor should possess the characteristic that pump motor characteristic possesses movable motor again, so the form of motor is exchange, and its work schedule is designed as 60 minutes, such motor meets the condition of hydraulic moving and hydraulic lifting.
4th, system possesses the automatic diagnostic function of failure, shows failure code by instrument, facilitates technological service.
5th, startability is good, because alternating current generator is the characteristic such as non-maintaining, high efficiency, low current, low noise, thus without the infringement for causing motor and energy consumption is small.
In a word, it is this to combine electrical system with the design of hydraulic system using single alternating current generator as core, machine system is improved efficiency, reduce energy consumption, the security for reducing maintaining, adding complete machine, and simple in construction, manoeuvrable, function strengthen.
Brief description of the drawings
Fig. 1 is hydraulic system principle figure of the invention.
Fig. 2 is electrical schematic diagram of the invention, wherein（a)、 （b)、 （C) be respectively the present invention electrical schematic diagram can connect together successively three parts electrical schematic diagram.
In figure：1 one transfers, 2-control Fujian, 3-multichannel Fujian, 4 one inclined lift devices, 5-travel driving unit, 6-commutation braking Fujian, 7-pressure switching valve, 8-gear pump, 9 one alternating current generators, 10 1 fuel tanks, 11 1 lift oil tanks, 12-dump ram, 13-steering gear, 14 1 steering cylinders, 15-inclined valve, 16-play lift valve, 17-walking off-load Fujian, 18-pressure-regulating speed-changing valve, 19 1 walking reversal valves, 20 1 brake valves, 21-double speed hydraulic motor, 22-Hydraulic Adjustable Speed valve, 23-liquid braking device, 24-second voltage regulation valve, 25-counterbalance valve, 26-pressure-reducing valve, 27-overflow valve, 28-overflow valve, 29-overflow valve, 30-preferential Fujian；
201-battery feed, 202-emergency stop switch, 203-key switch, 204-main contactor, 205 1 temperature sensors, 206-insulation monitoring device, 207-overload relay, 209-alternating-current controller, 210 1 instrument, 211-fuse, 212-raising tilt switch, 213-DC-DC transformers, 214-accelerator switch, 215-heat drop controls sensor, 216-electronic protection grid, 217-system security function switch.
Embodiment
The full hydraulic AC electrical forklift of the present invention, including hydraulic system and electrical system, wherein：Hydraulic system is as shown in figure 1, it includes：
Power set are constituted by the connected single alternating current generator 9 of transmission and gear pump 8;
Inclined lift device 4 is constituted by lift oil tank 11 and dump ram 12;
Transfer 1 is constituted by the steering gear 13 and steering cylinder 14 that are connected with pressure-gradient control valve 30;
Travel driving unit 5 is constituted by double speed hydraulic motor 21, the liquid braking device being arranged on motor 23 and Hydraulic Adjustable Speed valve 22;
Liquid braking device 23 is controlled by the walking relief brake valve 17 of control valve 2；
Banked direction control valves 3 is made up of inclined valve 15, raising wealthy 16 etc.：System pressure of the wealthy working connection of the oil-feed of banked direction control valves 3 provided with the control inclined lift of overflow valve 27 device 4, working connection is communicated with the cavity of inclined valve 15 and a lift valve 16, lift valve 16 is wherein played provided with the wealthy 28 control raising pressure of an overflow, inclined valve 15 connects dump ram 12, plays the connection lift oil tank 11 of lift valve 16;
Control valve 2 is made up of walking unloading valve 17, pressure-regulating speed-changing valve 18 etc.：The oil-feed valve block working connection of control valve 2 is connected provided with a control pressure of pressure-reducing valve 26,18-hydraulic fluid port of pressure-regulating speed-changing valve with second voltage regulation wealthy 24, and the speed governing Fujian 22 of another hydraulic fluid port and hydraulic motor is connected；17-hydraulic fluid port of unloading valve walk through the oil return box 10 of counterbalance valve 25, another hydraulic fluid port is connected with hydraulic motor brake 23；
Commutation braking wealthy 6 is by group ^ such as walking commutation Fujian 19, brake valves 20:The oil inlet of brake valve 6 commutate provided with a control pressure of overflow valve 29；The walking middle position oil return box of reversal valve 19, another two hydraulic fluid ports are connected with the forward and reverse hydraulic fluid port of hydraulic motor 21 respectively；Brake valve 20 is connected between walking reversal valve 19 and hydraulic motor 21；
Pressure switching valve 7 is made up of second voltage regulation Fujian 24 and counterbalance valve 25 etc.：Second voltage regulation wealthy 24 is connected with control valve 2 with the oil-out of gear pump 8, and counterbalance valve 25 is connected between oil return line and fuel tank 10；
The loop being made up of control valve 2, gear pump 8, double speed hydraulic motor 21, commutation brake valve 6, pressure switching valve is as hydraulic speed regulation loop.
Electrical system is as shown in Fig. 2 it includes battery feed 201, emergency stop switch 202, key switch 203, an alternating current generator 9 and exchanges sensing and controlling system：
Power supply is divided into high voltage power supply by DC-DC transformers 213 as the energy for battery feed 201 and low-tension supply two-way is exported：Low-tension supply connects exchange sensing and controlling system, an accelerated device through key switch 203 and switchs 214 alternating-current controllers 209 for being mainly used in controlling alternating current generator 9 connected;High voltage power supply connects alternating-current controller 209 and the main contactor 204 through being controlled by alternating-current controller 209 connects alternating current generator 9, and accelerator 214 and raising tilt switch 212 are connected with alternating-current controller 209;
And：The work of alternating current generator 9 is made as 60 minutes, and instrument 210 is connected with alternating-current controller 209, and low-tension supply controls electricity by alternating-current controller 209 through each functional switch, accurate electricity is shown by instrument 210；And failure is shown by instrument 210 to the system failure by the alternating-current controller 209 with automatic diagnostic function.
Exchange sensing and controlling system includes：Alternating-current controller 209, overload relay 207, temperature sensor 205, insulation monitoring device 206, heat drop control sensor 215, electronic protection grid 216 etc..
When the electrical system works, battery feed 201 arrives key switch 203 through emergency stop switch 202, when key switch 203 is connected, and through DC- DC transformers, 213 points are that two-way power supply is exported：
It is high pressure such as 70V power on alternating-current controller 209 all the way, then the adhesive of main contactor 204 and electricity and working condition is shown by instrument 210；When accelerator switch 214 is connected, alternating current generator 9 is connected by the output of alternating-current controller 209, at this moment alternating current generator 9 is in the idling mode set by alternating-current controller 209, with the displacement of accelerator 214（Pedal plate type）, the rotating speed of alternating current generator 9 is by low speed to high-speed cruising, and the operating of drive gear pump works for transfer, travel driving unit;When accelerator switch 214' in a state of nature when（Disconnecting circuit）, alternating current generator 9 still makes system be in idling work state within the time that alternating-current controller 209 is set, until setting time is finished, and system power supply is closed；When raising, tilt switch 212 are connected, then the operation of alternating current generator 9 is controlled to drive the operating of gear pump 8 to be worked for inclined lift device 4 by alternating-current controller 209.
Another road is such as 24 volts of low pressure, when key switch 203 is opened, it connects alternating-current controller 209 by insulation monitoring device 206, because insulation monitoring device 206 connects circuitry, complete machine is controlled not work (for example by alternating-current controller 209 when circuitry insulation values occurs up to the not setting value of road insulation monitoring device 206：When the insulaion resistance of battery 201 is less than standard）；During power on, working power is connected by overload relay 207 with alternating-current controller 209, when operating current is excessive, and overload relay 207 disconnects the power supply signal of alternating-current controller 209, machine system is stopped；When system temperature is too high, send transducing signal to alternating-current controller 209 and by the operating load of its reduction machine system to reach the purpose of control system temperature rise by heat drop temperature sensor 215；When system temperature exceedes setting mark Quasi, temperature sensor 5 sends transducing signal to alternating-current controller 209 and makes machine system be stopped by it, when temperature falls below established standardses, complete machine auto restore facility；System security function switch 217 and accelerator are opened passes 214 and are connected by electronic protection grid 216 with alternating-current controller 209, when there is abnormal working position in functional switch, electronic protection grid 216 will play cut-off protective action, and alternating-current controller 209 will not work.
The work of fork truck of the present invention is described in detail below in conjunction with hydraulic system and electrical system：
Using battery 201 as the energy, when key switch 203 is opened, by DC- DC transformers 213 by 70V and 24V power on, the at this moment adhesive of main contactor 204, electrical system is powered.
When foot-operated accelerator switch 214 is opened（Starting switch is arranged in accelerator, and once accelerator pedal starting switch is to open to pin point), the single motor 9 of the at this moment control of alternating-current controller 209 exchange directly drives the idle running of gear pump 8（Idling speed is by the ginseng speed setting of alternating-current controller program）, flow leads to hydraulic system, so as to meet the discharge capacity demand of steering gear 13, reaches the function of realizing fork truck pivot stud.
Moving forward and backward and controlling the rotating speed of alternating current generator 9 to control the discharge capacity of gear pump 8 to lead to liquid by alternating-current controller 209 by the stroke of pedal accelerator 214 for fork truck is converted by manipulating walking reversal valve 19
Pressure motor 21 controls the speed of travel of fork truck；When release accelerator 214 depresses brake valve 20, A, B oil duct of throttling closing hydraulic motor 21 realize braking.
Manipulate the speed reversal valve 18 in control valve 2 and by the second voltage regulation valve 24 in pressure switching valve 7 realize high pressure, low pressure and by the Hydraulic Adjustable Speed valve 22 in hydraulic motor 21 so as to reaching the climbing walking function and high speed walking function of fork truck；Convert the function of walking work and system unloaded by relief brake valve 17 of being walked in control valve 2, and the liquid braking device 23 led to by the braking shelves in wealthy in hydraulic motor 21 realize it is hand braking.
A micro limit switch 212 is respectively filled on raising Fujian 16 and inclined valve 15 in banked direction control valves 3, the travel switch closure that it is installed additional when having manipulated lift valve 16 connects the control alternating current generator 9 of alternating-current controller 209 and drives the full-speed operation of gear pump 8 fork truck is reached landing function；When manipulating inclined valve 15, same principle makes fork truck reach tilt function.
Under the single idling work state of motor 9 of the control exchange of alternating-current controller 209, energy can be made to meet the demand of steering, underload, few energy consumption can be played a part of again, in normal operation, the pressure-gradient control valve 30 configured due to steering gear 13, make fork-truck steering sensitive, and ensure in any action, fork truck has the action preferentially turned to all the time.
When accelerator switch 214 in a state of nature when（Disconnecting circuit）, alternating-current controller 209 still make within the time of setting system be in idling work state, one to setting time system power supply close（Delay time is set in alternating-current controller program）, this ensure that within the certain time not operated, still ensuring that turning function.
When system failure or operating mistake by the automatic diagnostic function in alternating-current controller 209, failure is shown with English and digital form in instrument 210, technological service is facilitated.
Controlled using AC frequency conversion vector velocity, the characteristics of its flexibility, accuracy height and rubbing are driven makes fork truck have the superperformance that transmission efficiency, temperature are low, running current is small；Due to there is no carbon brush and commutator using alternating current generator, so alternating current generator is non-maintaining.
When complete machine works; electrical system by alternating-current controller 209 can be easily to hydraulic running system working condition set and adjusted, and the load overcurrent of electrical system can be protected by the regulation of pressure switching valve 7 and walking drain charge brake valve 17.
Claims (1)
- Claims1st, full hydraulic AC electrical forklift, including hydraulic system and electrical system, it is characterized in that：The hydraulic system includes：Mainly by lift oil tank（And dump ram 11)（12) composition and by banked direction control valves（The inclined lift device of 3 controls（4),Mainly by steering gear（And steering cylinder 13)（14) transfer of composition（1),By hydraulic motor（21) and it is arranged on hydraulic motor（21) hydraulic motor brake on（23) with hydraulic motor flow speed control valve（22) composition and by a control valve（2) with a commutation brake valve（6) travel driving unit of control（5), andOne gear pump（8), the gear pump（8) the hydraulic energy point two-way output produced：All the way through a pressure-gradient control valve（30) described transfer is supplied（1) with described inclined lift device（4), another Lu Jingyi pressure switching Fujian (7) leads to described travel driving unit（5);Described electrical system includes：Battery feed（201), key switch（203) a, alternating current generator（9) with exchange sensing and controlling system,With battery feed（201) emergency stop switch is passed through as the energy（202) connect and by DC- DC transformers（213) it is divided into high voltage power supply and the output of low-tension supply two-way：Low-tension supply is through the key switch（203) exchange sensing and controlling system, the alternating-current controller that is mainly used in controlling the alternating current generator are connected（209) and connect with the alternating-current controller（209) instrument of connection（210), temperature sensor（205), high voltage power supply passes through fuse（211) alternating-current controller is connected（209) and through being controlled by the alternating-current controller（209) main contactor（204) alternating current generator is connected（9), in the alternating-current controller（209) accelerator is connected with（214) with raising, tilt switch（212), and load-relay is connected（207), insulation monitoring device（206), heat drop is controlled（215), electronic protection grid（216), security function is switched（217); 'Pass through the accelerator（214) transfer is controlled（And travel driving unit 1)（5), described raising, tilt switch（212) through the alternating-current controller（209) alternating current generator is controlled（9) gear pump is driven（8) and further through banked direction control valves（3) inclined lift device is controlled（4).2nd, all-hydraulic electronic exchange forklift hydraulic system according to claim 1, it is characterized in that described banked direction control valves（3) include controlling lift oil tank respectively（And dump ram 11)（12) served as lift valve by three six-way valves（And inclined valve 16)（15), in the banked direction control valves（3) working connection is wealthy (27) provided with an inclined lift overflow, in control lift oil tank（11) three six-way valves rise provided with one Rise Pressure relief valve（28).3rd, all-hydraulic electronic exchange truck hydraulic according to claim 1 or 2 ' system, the pressure switching valve described in its feature（7) include second voltage regulation wealthy (24) and back pressure is wealthy（25);Described control valve(2) walking unloading valve is included（17) with pressure-regulating speed-changing valve（18), control valve（2) working connection is provided with decompression Fujian (26), the pressure-regulating speed-changing valve（18) a hydraulic fluid port and the second voltage regulation valve（24) connect, another hydraulic fluid port and hydraulic motor flow speed control valve（22) connect, the walking unloading valve（17) a hydraulic fluid port is through counterbalance valve（25) oil return box, another hydraulic fluid port and hydraulic motor brake（23) connect.4th, all-hydraulic electronic exchange forklift hydraulic system according to claim 3, it is characterized in that described commutation brake valve（6) walking reversal valve is included（And brake valve 19)（20);Described commutation brake valve (19) is three guiding valves, and its oil inlet is provided with an overflow valve（29), its middle position is connected with fuel tank, another two hydraulic fluid ports respectively with hydraulic motor（21) forward and reverse hydraulic fluid port connection；Described brake valve（20) it is connected to walking reversal valve（And hydraulic motor 19)（21) between. '
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2008/000316 WO2009100578A1 (en) | 2008-02-04 | 2008-02-04 | A full hydraulic ac electrical forklift |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101711221A true CN101711221A (en) | 2010-05-19 |
| CN101711221B CN101711221B (en) | 2011-10-19 |
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ID=40956613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008800200439A Expired - Fee Related CN101711221B (en) | 2008-02-04 | 2008-02-04 | A full hydraulic AC electrical forklift |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN101711221B (en) |
| DE (1) | DE112008003677T5 (en) |
| GB (1) | GB2471217B (en) |
| WO (1) | WO2009100578A1 (en) |
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| CN102900715A (en) * | 2012-10-08 | 2013-01-30 | 北京索普液压机电有限公司 | Hydraulic control system for forklift, and forklift |
| CN107215829A (en) * | 2017-06-28 | 2017-09-29 | 安徽合力股份有限公司 | A kind of electri forklift operation control system |
| CN109654075A (en) * | 2018-12-07 | 2019-04-19 | 贵州航天特种车有限责任公司 | A kind of walking fluid power system on chassis |
| CN110065912A (en) * | 2019-05-22 | 2019-07-30 | 徐州徐工特种工程机械有限公司 | The linkage interlocked control system of electri forklift |
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-
2008
- 2008-02-04 DE DE112008003677T patent/DE112008003677T5/en not_active Ceased
- 2008-02-04 WO PCT/CN2008/000316 patent/WO2009100578A1/en active Application Filing
- 2008-02-04 GB GB1014327.9A patent/GB2471217B/en not_active Expired - Fee Related
- 2008-02-04 CN CN2008800200439A patent/CN101711221B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900715A (en) * | 2012-10-08 | 2013-01-30 | 北京索普液压机电有限公司 | Hydraulic control system for forklift, and forklift |
| CN102900715B (en) * | 2012-10-08 | 2015-06-24 | 北京索普液压机电有限公司 | Hydraulic control system for forklift, and forklift |
| CN107215829A (en) * | 2017-06-28 | 2017-09-29 | 安徽合力股份有限公司 | A kind of electri forklift operation control system |
| CN109654075A (en) * | 2018-12-07 | 2019-04-19 | 贵州航天特种车有限责任公司 | A kind of walking fluid power system on chassis |
| CN110065912A (en) * | 2019-05-22 | 2019-07-30 | 徐州徐工特种工程机械有限公司 | The linkage interlocked control system of electri forklift |
| CN110065912B (en) * | 2019-05-22 | 2024-05-28 | 徐州徐工特种工程机械有限公司 | Linkage interlocking control system of electric forklift |
| CN110282581A (en) * | 2019-07-25 | 2019-09-27 | 徐州徐工特种工程机械有限公司 | The anti-cargo rollover control system of electri forklift |
| CN110282581B (en) * | 2019-07-25 | 2024-05-28 | 徐州徐工特种工程机械有限公司 | Anti-tipping control system for electric forklift |
| CN112249981A (en) * | 2020-09-30 | 2021-01-22 | 安徽合力股份有限公司 | Forklift traveling system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101711221B (en) | 2011-10-19 |
| GB2471217A (en) | 2010-12-22 |
| DE112008003677T5 (en) | 2011-04-07 |
| GB2471217B (en) | 2012-04-25 |
| GB201014327D0 (en) | 2010-10-13 |
| WO2009100578A1 (en) | 2009-08-20 |
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