CN104150406A - Electrical control system for large-tonnage electric forklift lifting and steering action - Google Patents
Electrical control system for large-tonnage electric forklift lifting and steering action Download PDFInfo
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- CN104150406A CN104150406A CN201410367433.0A CN201410367433A CN104150406A CN 104150406 A CN104150406 A CN 104150406A CN 201410367433 A CN201410367433 A CN 201410367433A CN 104150406 A CN104150406 A CN 104150406A
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Abstract
The invention provides an electrical control system for large-tonnage electric forklift lifting and steering action. The electrical control system comprises a storage battery, a multiway valve, pump motor controllers and a steering signal processor, the pump motor controllers and the steering signal processor are parallelly connected between a key switch output end and a storage battery negative electrode, and a tilt microswitch, an accessory microswitch and a hoisting and speed controlling sensor are connected on the multiway valve; two ends of each of the tilt microswitch and the accessory microswitch are connected with the first pump electrical controller, and the speed controlling end of the hoisting and speed controlling sensor is connected with the first pump motor controller and the second pump motor controller respectively; the signal output end of the steering signal processor is connected with the second pump motor controller; hoisting action of a forklift portal is joint operated by two pump motors, and system output power is the sum of operation power of two motors; tilting of the portal, steering of a vehicle and acting of accessories are driven by the individual pump motor, so that the two pump motors can operate at the working point of higher efficiency under different stations, operation efficiency of the whole vehicle is improved, and energy sources are saved.
Description
Technical field
The present invention relates to fork truck technical field, be specifically related to the electric control system of the lifting of a kind of large-tonnage electri forklift and handling maneuver.
Background technology
Generally, the principle of design of the lifting of counterweight motor-driven forklift and the electric control system of turning function has two schemes: the first is to be realized and comprised that door frame hoists by pump motor of a controller control, the derricking motion of inclination and accessory etc., the signal of each derricking motion triggers after obtaining moving request instruction by controller, and Vehicular turn action is carried out by independent motor, by the break-make of the power supply of contactless switch control steer motor, turn sign is triggered by key switch, the line packet generation pressure reduction of the rear contactless switch of the key switch energising then contact adhesive of contactless switch makes steer motor obtain electric rear rotation.This kind of mode has obvious inferior position, and not only cost is higher, and causes the waste of the storage battery energy.The second way be by pump motor of a controller control realize that door frame hoists, the action such as inclination, Vehicular turn and accessory, each actuating signal triggers after obtaining moving request instruction by controller.Lower and the relative energy-saving of this kind of mode cost is the mode that the less tonnage electri forklift of Present Domestic 1-3.5 ton is generally taked.
But in the choosing of the large-tonnage electri forklift lifting more than 4 tons and the electric control project of steering swivel system, if the action such as take the second electric control system to realize lifting by the single pump motor of single controller control and to turn to, because pump motor power large (generally exceeding 20KW) causes turning point, (power is 2KW left and right, rotating speed 500-900rpm) work efficiency on the low side, when long, work can cause that the motor feels hot, causes the serious waste of the storage battery energy; And purchase cost is higher, the topological design of car load is also relatively difficult.
Summary of the invention
The problem that efficiency is low, energy consumption is large, cost is high and layout is difficult that the present invention exists in order to overcome the electric control system of prior art, the electric control system of the lifting of a kind of large-tonnage electri forklift and handling maneuver is provided, realizes and combine the lifting (door frame hoists, inclination, accessory) and the handling maneuver that drive fork truck.
Technical scheme of the present invention is: the electric control system of the lifting of a kind of large-tonnage electri forklift and handling maneuver, comprise storage battery, multiway valve and be connected in parallel on pump motor controller and the turn sign treater between key switch mouth, battery negative post, on the inclination valve rod of described multiway valve, be connected with on the valve rod that hoists that is connected with accessory micro-switch, multiway valve on the accessory valve rod of inclination micro-switch, multiway valve and be connected with the speed governing sensor that hoists; Described pump motor controller is two the first pump motor controllers in parallel and the second pump motor controller, and described the first pump motor controller and the second pump motor controller are connected with respectively the first pump motor, the second pump motor; The two ends of described inclination micro-switch, accessory micro-switch are all connected with the first pump appliance controller, described in hoist that the both ends of power of speed governing sensor is all connected with the second pump motor controller, speed governing end is connected with the first pump motor controller and the second pump motor controller respectively; The signal output part of described turn sign treater is connected with the second pump motor controller.
The described speed governing sensor that hoists is analogue type displacement pickup, and in the time that the signal that hoists does not arrive, the speed governing end movement variable quantity of sensor is 0; In the time that the signal that hoists arrives, the speed governing end of sensor is inputted speed-regulating signal respectively the mimic imput signal port of the first pump motor controller, the second pump motor controller, along with the increase of the displacement variable of sensor drives the first motor, the second motor from low speed to high-speed operation simultaneously, enter lifting work device and make door frame realize infinite speed variation to hoist thereby drive the first oil pump, the second oil pump to produce high pressure oil.
Further, described inclination micro-switch and accessory micro-switch are switch open in usual: in the time that tilt signals does not arrive, inclination micro-switch disconnects; In the time that tilt signals arrives, the two ends of inclination micro-switch are communicated with the digital input power port of the first pump motor controller respectively with door frame tilt signals input end, drive the first pump motor running to drive the first oil pump to produce high pressure oil and enter lifting work device, and door frame is tilted.Accessory micro-switch disconnects in the time that accessory actuating signal does not arrive, in the time that accessory actuating signal arrives, its two ends are connected the digital input power port of the first pump motor controller and door frame accessory actuating signal input end, drive the first pump motor running, the first pump motor drives the first oil pump to produce high pressure oil and enters lifting work device, makes accessory action.
Described the first pump motor, the second pump motor are three phase squirrel cage AC induction motor.
Further, the high pressure oil that described the first pump motor drives the first oil pump to produce enters lifting work device through multiway valve, and described lifting work device drives respectively the hoisting of forklift door frame, inclination and accessory action; The high pressure oil that described the second pump motor drives the second oil pump to produce is connected with multiway valve, load-transducing deflector respectively through pressure-gradient control valve, described load-transducing deflector drives Vehicular turn action, the high pressure oil that described the second oil pump produces injects multiway valve through the high pressure oil of pressure-gradient control valve and the generation of the first oil pump simultaneously, enters lifting work device and drive hoisting of forklift door frame behind multiway valve interflow.
Further, the chip of described the first pump motor controller, the second pump motor controller is AC2 POWER 450 chips, and the chip of described turn sign treater is AC3 FLASH 650 chips; Described first chip of pump motor controller and the coil tandem of contactless switch, the contact of described contactless switch is serially connected in the power input of described the first pump motor controller, the second pump motor controller.
Further, also comprise the display instrument in parallel with turn sign treater.
Further, the power input of described key switch is connected with the second wire fuse, and the contact input end of described contactless switch is connected with the first wire fuse.
The present invention controls two pump motors with two pump motor controllers in parallel, combine drive that forklift door frame hoists, the action of inclination, accessory and Vehicular turn.
When switching on power, the coil two ends of contactless switch produce voltage difference, the contacting of contactless switch, the first pump motor controller and the energising of the second pump motor controller.When hoisting when valve rod of pull-up multiway valve, along with the change in displacement of the speed governing sensor speed governing end that hoists, two pump motor controllers control respectively two pump motors by low speed to high-speed cruising, forklift door frame is realized infinite speed variation and is hoisted.In the time that inclination micro-switch is connected, first pump motor controller control the first pump motor constant speed drive, makes door frame tilting action.In the time that accessory micro-switch is connected, first pump motor controller control the first pump motor constant speed drive, makes accessory action.In the time triggering turn sign, signal is inputted the second pump motor controller by turn sign treater, the second pump motor constant speed drive, and fork truck is realized turning function.Door frame tilts and the running velocity of accessory can be set by the correlation parameter of the chip of adjusting the first pump motor controller, and motor speed when fork-truck steering can pass through the correlation parameter of the chip that regulates the second pump motor controller and set.
Beneficial effect of the present invention has:
1, forklift door frame hoists when action, by two pump motor associated working, system horsepower output be double-motor running power and; And door frame inclination and handling maneuver and accessory action drive by single pump motor.The reasonable distribution respectively performing an action, is all operated on the operation point of greater efficiency two pump motors (hoist, the action of inclination, accessory, turn to) under different operating modes, has improved the work efficiency of car load, has saved the energy.
2, the present invention adopts the associating of two pump motors or drives separately operation of oil pump, and the little and small volume of the power of its single pump motor, makes the car load layout of fork truck easier.
3, because the power of two pump motors is less, can use the ripe pump motor of little tonnage (3 tons are following), purchase cost is lower, quality and dependable performance.
4, the door frame that the present invention is formed by two pump motor controllers, two pump motors and the speed governing sensor that the hoists continuous speed regulation system that hoists, door frame is hoisted, and action is stable from low speed to fast speed running state, reliable, registration.
5, system possesses automatic fault diagnosis function, shows failure code by fault display instrument table, has facilitated technical service.
Brief description of the drawings
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Fig. 1 is principle of work structural representation of the present invention,
Fig. 2 is electric control system circuit diagram of the present invention,
In figure: 1-storage battery, 2-1 the first pump motor controller, 2-2 the second pump motor controller, 3-1 the first pump motor, 3-2 the second pump motor, 4-1 the first oil pump, 4-2 the second oil pump, 5-accessory micro-switch, 6-inclination micro-switch, the 7-speed governing sensor that hoists, 8-turn sign treater, 9-pressure-gradient control valve, the deflector of 10-load-transducing, 11-multiway valve, 12-lifting work device, 13-urgent power-off switch, 14-key switch, 15-contactless switch, 15-1 contact, 15-2 coil, 16-1 the first wire fuse, 16-2 the second wire fuse, 17-display instrument.
Detailed description of the invention
As shown in Figure 1, the electric control system of the lifting of a kind of large-tonnage electri forklift and handling maneuver, comprise 80 overhead accumulators 1 that system is powered, multiway valve 11 and be connected in parallel on the first pump motor controller 2-1, the second pump motor controller 2-2 and the turn sign treater 8 between key switch mouth, storage battery 1 negative pole; On the inclination valve rod of described multiway valve 11, be connected with on the valve rod that hoists that is connected with accessory micro-switch 5, multiway valve 11 on the accessory valve rod of inclination micro-switch 6, multiway valve 11 and be connected with the speed governing sensor 7 that hoists; Inclination micro-switch 6, accessory micro-switch 5 are connected with the first pump appliance controller 2-1, and the speed governing end of the speed governing sensor 7 that hoists is connected with the first pump motor controller 2-1 and the second pump motor controller 2-2 respectively; The signal output part of turn sign treater 8 is connected with the second pump motor control 2-2; The mouth of described the first pump motor controller 2-1 is connected with the first oil pump 4-1 by the first pump motor 3-1, the mouth of the first oil pump 4-1 is connected with lifting work device 12 by multiway valve 11, and lifting work device 12 drives inclination and the accessory action of forklift door frame; The mouth of the second pump motor controller 2-2 is connected with the second oil pump 4-2 by the second pump motor 3-2, the oil outlet end of the second oil pump 4-2 is connected with multiway valve 11, load-transducing deflector 10 respectively by pressure-gradient control valve 9, and load-transducing deflector 10 drives fork-truck steering action; The high pressure oil that the second oil pump 4-2 produces injects multiway valve 11 through the high pressure oil of pressure-gradient control valve 9 and the first oil pump 4-1 generation simultaneously, behind multiway valve 11 interflow, enters lifting work device 12, and lifting work device 12 drives hoisting of forklift door frame.
Further, described inclination micro-switch 6 and accessory micro-switch 5 are switch open in usual: in the time that tilt signals does not arrive, all disconnect, in the time that tilt signals arrives, to the first pump motor controller input signal, drive the first pump motor running to drive the first oil pump to produce high pressure oil and enter lifting work device, make door frame realize tilting action or accessory action.
Further, the first pump motor 3-1, the second pump motor 3-2 are three phase squirrel cage AC induction motor.The chip of the first pump motor controller 2-1, the second pump motor controller 2-2 is AC2 POWER 450 chips, and the chip of described turn sign treater 8 is AC3 FLASH 650 chips; Described the first chip of pump motor controller 2-1 and the coil 15-2 of contactless switch 15 are connected in series, and the contact 15-1 of described contactless switch 15 is serially connected in the power input of the power cell of described the first pump motor controller 2-1, the second pump motor controller 2-2.
As shown in Figure 2, the electric control system of the lifting of a kind of large-tonnage electri forklift and handling maneuver comprises urgent power-off switch 13, the second wire fuse 16-2 and the key switch 14 of connecting with 80 overhead accumulators 1, is connected in parallel on the first pump motor controller 2-1, the second pump motor controller 2-2, turn sign treater 8 and display instrument 17 between key switch 14 mouths, storage battery 1 negative pole; The mouth of urgent power-off switch 13 is connected with the input end of the contact 15-1 of contactless switch 15 by the first wire fuse 16-1, and the mouth of contact 15-1 is connected with the power positive supply connection terminal BP1 of the first pump motor controller 2-1, the power positive supply connection terminal BP2 of the second pump motor controller 2-2 respectively; Between control port NMC, the PMC of the AC2 POWER 450 chip U1 of the first pump motor controller 2-1, be connected in series and between coil 15-2, the digital input port CCM of contactless switch 15 and tilt signals input end DIG1, be connected in series connection terminal U1, the V1, the W1 that between inclination micro-switch 6, digital input port CCM and accessory signal input part DIG2, are connected in series the power cell of accessory micro-switch 5, the first pump motor controller 2-1 and be connected with the field lead wire of the first pump motor 3-1 respectively.Power port PPOT, the NPOT of the AC2 POWER 450 chip U2 of the second pump motor controller 2-2 are connected with the both ends of power of the speed governing sensor 7 that hoists respectively, and the speed governing end of the speed governing sensor 7 that hoists is connected with the signal port CPOT1 of chip U1, the signal port CPOT2 of chip U2 respectively; The signal input port DIG3 of chip U2 is connected with the signal output port DIGO of the AC3 FLASH of turn sign treater 8 650 chip U3, connection terminal U2, the V2 of the power cell of the second pump motor controller 2-2, W2 are connected with the field lead wire of the second pump motor 3-2 respectively.The speed sensor SR1 of the first pump motor 3-1 respectively with the chip U1 of the first pump motor controller 2-1+12V, GND, PHA1, PHB1 signal port be connected, the temperature sensor ST1 of the first pump motor 3-1 is connected with PT1, the NT1 signal port of the chip U1 of the first pump motor controller 2-1 respectively; The speed sensor SR2 of the second pump motor 3-2 respectively with the chip U2 of the second pump motor controller 2-2+12V, GND, PHA2, PHB2 signal port be connected, the temperature sensor ST2 of the second pump motor 3-2 is connected with PT2, the NT2 signal port of the chip U2 of the second pump motor controller 2-2 respectively, and the breakdown signal of system is presented on display instrument by CANBUS bus.
Storage battery 1 is as power supply, when after urgent power-off switch 13 and key switch 14 connections, through the second wire fuse 16-2, the first pump motor controller 2-1, the second pump motor controller 2-2, turn sign treater 8 and display instrument 17 logical circuits are powered on, after System self-test, the coil 15-2 of contactless switch 15 obtains electric, contact 15-1 adhesive, main circuit power is connected to power supply on the first pump motor controller 2-1 and the second pump motor controller 2-2 power cell through urgent power-off switch 13, the first wire fuse 16-1, contact 15-1.
On the inclination valve rod of fork truck oil circuit multiway valve 11, be connected with on the valve rod that hoists that is connected with accessory micro-switch 5, multiway valve 11 on the accessory valve rod of inclination micro-switch 6, multiway valve 11 and be connected with the speed governing sensor 7 that hoists.
When pulling while hoisting valve rod, be arranged on the speed governing sensor 7 that hoists on multiway valve 11 and obtain the signal that hoists, the signal that hoists is sent to the first pump motor controller 2-1 and the second pump motor controller 2-2, the first pump motor controller 2-1 and the second pump motor controller 2-2 regulate and are added in the first pump motor 3-1 and the upper voltage of the second pump motor 3-2 according to instruction, make two pump motors export corresponding rotating speed and moment of torsion, drive the first oil pump 4-1 and the second oil pump 4-2 rotation to produce high pressure oil, the high pressure oil that the second oil pump 4-2 produces injects multiway valve 11 through the high pressure oil of pressure-gradient control valve 9 and the first oil pump 4-1 generation simultaneously, behind multiway valve 11 interflow, enter lifting work device 12, along with the stroke adjustment of the speed governing sensor 7 that hoists, the first pump motor controller 2-1 and the second pump motor controller 2-2 control respectively the first pump motor 3-1 and the second pump motor 3-2 changed speed operation, make forklift door frame realize infinite speed variation.Hoist in process at door frame, the first pump motor 3-1 and the second pump motor 3-2 work simultaneously.
In the time pulling inclination valve rod, the inclination micro-switch 6 being arranged on multiway valve 11 is connected, tilting action request signal is inputted the first pump motor controller 2-1 and is driven the first pump motor 3-1 constant speed rotation speed operation (its rotating speed is set by the chip U1 of the first pump motor controller 2-1, can change), the first pump motor 3-1 drives the first oil pump 4-1 to produce high pressure oil, after multiway valve 11, enter lifting work device 12, door frame is tilted.
In the time pulling accessory valve rod, the accessory micro-switch 5 being arranged on multiway valve 11 is connected, accessory action request signal is inputted the first pump motor controller 2-1 and is driven the first pump motor 3-1 constant speed rotation speed operation, the first pump motor 3-1 drives the first oil pump 4-1 to produce high pressure oil, after multiway valve 11, enter high pressure oil lifting work device 12, make accessory action.
In the time of car load walking or braking, turn sign treater 8 sends steering order, turn sign is inputted the second pump motor controller 2-2 and is driven the second pump motor 3-2 constant speed rotation speed operation (rotating speed is set by the chip U2 of the second pump motor controller 2-2, can change), the second pump motor 3-2 drives the second oil pump 4-2 to produce high pressure oil, flow into load-transducing deflector 10 through pressure-gradient control valve 9, realize turning to preferential shunting fuel feeding, thereby realize the work that turns to of system.
Above embodiment is not limited only to protection scope of the present invention, all modify based on basic thought of the present invention or change all belong to protection scope of the present invention.
Claims (6)
1. the electric control system of large-tonnage electri forklift lifting and handling maneuver, comprise storage battery (1), multiway valve (11) and be connected in parallel on pump motor controller and the turn sign treater (8) between key switch (14) mouth, storage battery (1) negative pole, it is characterized in that: on the inclination valve rod of described multiway valve (11), be connected with on the valve rod that hoists that is connected with accessory micro-switch (5), multiway valve (11) on the accessory valve rod of inclination micro-switch (6), multiway valve (11) and be connected with the speed governing sensor (7) that hoists; Described pump motor controller is two the first pump motor controllers (2-1) in parallel and the second pump motor controller (2-2), and described the first pump motor controller (2-1) and the second pump motor controller (2-2) are connected with respectively the first pump motor (3-1), the second pump motor (3-2); The two ends of described inclination micro-switch (6), accessory micro-switch (5) are all connected with the first pump appliance controller (2-1), described in hoist that the both ends of power of speed governing sensor (7) is all connected with the second pump motor controller (2-2), speed governing end is connected with the first pump motor controller (2-1) and the second pump motor controller (2-2) respectively; The signal output part of described turn sign treater (8) is connected with the second pump motor controller (2-2).
2. the electric control system of a kind of large-tonnage electri forklift according to claim 1 lifting and handling maneuver, is characterized in that: described inclination micro-switch (6) and accessory micro-switch (5) are switch open in usual; Described the first pump motor (3-1), the second pump motor (3-2) are three phase squirrel cage AC induction motor.
3. the electric control system of a kind of large-tonnage electri forklift according to claim 1 lifting and handling maneuver, it is characterized in that: the high pressure oil that described the first pump motor (3-1) drives the first oil pump (4-1) to produce enters lifting work device (12) through multiway valve (11), described lifting work device (12) drives respectively inclination and the accessory action of forklift door frame; The high pressure oil that described the second pump motor (3-2) drives the second oil pump (4-2) to produce is connected with multiway valve (11), load-transducing deflector (10) respectively through pressure-gradient control valve (9), described load-transducing deflector (10) drives Vehicular turn action, the high pressure oil that described the second oil pump (4-2) produces injects multiway valve (11) through the high pressure oil of pressure-gradient control valve (9) and the first oil pump (4-1) generation simultaneously, and described lifting work device (12) drives hoisting of forklift door frame.
4. the electric control system of a kind of large-tonnage electri forklift according to claim 1 lifting and handling maneuver, it is characterized in that: the chip of described the first pump motor controller (2-1), the second pump motor controller (2-2) is AC2 POWER 450 chips, and the chip of described turn sign treater (8) is AC3 FLASH 650 chips; The chip of described the first pump motor controller (2-1) is connected in series with the coil (15-2) of contactless switch (15), and the contact (15-1) of described contactless switch (15) is serially connected in the power input of the power cell of described the first pump motor controller (2-1), the second pump motor controller (2-2).
5. the electric control system of a kind of large-tonnage electri forklift according to claim 1 lifting and handling maneuver, is characterized in that: also comprise the display instrument (17) in parallel with turn sign treater (8).
6. the electric control system of a kind of large-tonnage electri forklift according to claim 1 lifting and handling maneuver, it is characterized in that: the power input of described key switch (14) is connected with the second wire fuse (16-2), the input end of the contact (15-1) of described contactless switch (15) is connected with the first wire fuse (16-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410367433.0A CN104150406B (en) | 2014-07-30 | 2014-07-30 | A kind of large-tonnage electric forklift lifting and the electric control system of go to action |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410367433.0A CN104150406B (en) | 2014-07-30 | 2014-07-30 | A kind of large-tonnage electric forklift lifting and the electric control system of go to action |
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| CN104150406A true CN104150406A (en) | 2014-11-19 |
| CN104150406B CN104150406B (en) | 2016-08-17 |
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| CN104817044A (en) * | 2015-05-15 | 2015-08-05 | 安徽合力股份有限公司 | Lifting drive power control system for large-tonnage electric forklift portal |
| CN109437060A (en) * | 2018-12-25 | 2019-03-08 | 安徽合力股份有限公司 | A kind of control device of electri forklift pallet fork Automatic Levelling |
| CN110552919A (en) * | 2018-06-01 | 2019-12-10 | 西安博贤机电设备有限公司 | Double-pump confluence automatic hydraulic speed regulation system with basic speed |
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| CN110552919A (en) * | 2018-06-01 | 2019-12-10 | 西安博贤机电设备有限公司 | Double-pump confluence automatic hydraulic speed regulation system with basic speed |
| CN109437060A (en) * | 2018-12-25 | 2019-03-08 | 安徽合力股份有限公司 | A kind of control device of electri forklift pallet fork Automatic Levelling |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104150406B (en) | 2016-08-17 |
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