CN107215829B - Electric fork truck operation control system - Google Patents
Electric fork truck operation control system Download PDFInfo
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- CN107215829B CN107215829B CN201710510443.9A CN201710510443A CN107215829B CN 107215829 B CN107215829 B CN 107215829B CN 201710510443 A CN201710510443 A CN 201710510443A CN 107215829 B CN107215829 B CN 107215829B
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- switch
- relay
- motor controller
- lifting
- converter
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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
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
- B66F17/003—Safety devices, e.g. for limiting or indicating lifting force for fork-lift trucks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
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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
- B66F9/24—Electrical devices or systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Power Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention relates to an electric forklift operation control system, which comprises a power supply, a pump motor controller, a walking motor controller and a DC-DC converter, wherein the positive electrode of the power supply is connected with the input end of the DC-DC converter through an emergency stop switch and is respectively connected with positive electrode terminals of the pump motor controller and the walking motor controller through contacts of a main contactor S3, a coil of the main contactor S3 is connected with the walking motor controller, and the grounding ends of the DC-DC converter and the walking motor controller are connected with the negative electrode end of the power supply; the output end of the emergency stop switch is connected with the control end of the DC-DC converter through a key switch, and the lifting and tilting valve control switch is connected with the forward and backward switches through a switching circuit and the negative electrode of the power supply. The invention can simultaneously and effectively control the lifting, tilting and valve control functions and the walking functions, can also meet the independent operation of the lifting, tilting and valve control functions or the walking functions, and improves the safety of forklift operation.
Description
Technical Field
The invention belongs to the technical field of forklift electrical control systems, and particularly relates to an electric forklift operation control system.
Background
The balanced fork truck is applied to places with dense goods, limited space, such as warehouses, wharfs, indoor goods and the like, and has the characteristics of frequent lifting, tilting, walking and the like. The existing balancing weight electric fork-lift truck has the advantages that the running function, lifting, tilting and other valve control functions exist simultaneously, do not interfere with each other, can work simultaneously, and cannot meet the requirement when one function runs during operation, and the other function is automatically forbidden; so that many operators can easily perform valve control functions such as lifting, tilting and the like by misoperation while walking; or the traveling function is misoperated when valve control operations such as lifting, tilting and the like are performed, so that a very dangerous working environment is formed.
Disclosure of Invention
The invention aims to provide an operation control system of an electric forklift, which can enable lifting, tilting and valve control functions and walking functions to be effective simultaneously, can also meet the independent operation of any functions such as lifting, tilting and valve control functions or walking and the like, and improves the safety of forklift operation.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the electric forklift operation control system comprises a power supply, a pump motor controller, a walking motor controller and a DC-DC converter connected with a load, wherein the pump motor controller is connected with a lifting and tilting valve control switch, the walking motor controller is connected with a forward switch, a backward switch and a pedal switch, the positive electrode of the power supply is connected with the input end of the DC-DC converter through a sudden stop switch and is respectively connected with the positive electrode wiring ends of the pump motor controller and the walking motor controller through contacts of a main contactor S3, a coil of the main contactor S3 is connected with the walking motor controller, and the grounding ends of the DC-DC converter and the walking motor controller are connected with the negative electrode end of the power supply; the output end of the emergency stop switch is connected with the control end of the DC-DC converter through a key switch, the lifting and tilting valve control switch is connected with the advancing and retreating switch through a switching circuit, and the switching circuit is used for switching the lifting and tilting valve control function or the walking function according to the current closing states of the lifting and tilting valve control switch, the advancing and retreating switch.
Further, the switching circuit comprises a relay S1 and a relay S2, wherein a coil of the relay S1 is connected in series between a power negative electrode and an output end of a lifting and tilting valve control switch, a coil of the relay S2 is connected in series between the power negative electrode and an output end of a pedal switch, an input end of the lifting and tilting valve control switch is connected with a control end of a DC-DC converter through a contact of the relay S2, and an input end of a forward and backward switch is connected with an input end of the pedal switch and a control end of the DC-DC converter through a contact of the relay S1.
Further, a main switch KG is connected in series between the coil of the relay S1, the coil of the relay S2 and the negative electrode of the power supply.
Further, the contacts of the relay S1 and the contacts of the relay S2 are normally closed contacts.
Further, the output end of the contact of the main contactor S3 and the output end of the key switch are respectively connected in series with a first fuse and a second fuse.
Further, the first fuse adopts a resistor R1, and the second fuse adopts a resistor R2.
According to the technical scheme, the electric forklift operation control system is simple in circuit, realizes simultaneous effective valve control and walking functions of lifting, tilting and the like of the whole forklift, can prevent the operation of another function when any function such as lifting, tilting or walking is operated, does not damage the performance of the original forklift, does not change the original mechanical design, is low in improvement cost, is high in modification efficiency and ensures the safety of forklift operation. When the main switch KG is disconnected, the walking and lifting and tilting functions exist simultaneously, namely the walking can lift and tilt during walking, the walking can be performed during lifting and tilting, whether the functions exist or not can be determined according to environmental factors and working conditions, and the working efficiency can be improved and the safe working conditions can be guaranteed. After the main switch KG is closed, an operation function is realized, or the main switch KG walks or is lifted and inclined, so that reliable and safe work guarantee is provided for safety managers in narrow spaces and crowded places.
Drawings
Fig. 1 is an electrical schematic of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1, the electric forklift operation control system of the present embodiment includes a storage battery 1, a pump motor controller 2 for controlling a motor M1, a walking motor controller 3 for controlling a walking motor M2, and a DC-DC converter 5 connected to a load 4, wherein the pump motor controller 2 is connected with a lifting and tilting valve control switch 6, the walking motor controller 3 is connected with a forward and backward switch 7 and a pedal switch 11, the positive electrode of the storage battery 1 is connected with the input end of the DC-DC converter 5 through a scram switch 10, and is connected with the pump motor controller 2 and the positive electrode terminal of the walking motor controller 3 through contacts 91 of a main contactor S3, the coils 92 of the main contactor S3 are connected with the walking motor controller 3, and the output ends of the DC-DC converter 5 and the walking motor controller 3 are connected with the negative electrode end of the storage battery 1; the output end of the emergency stop switch 10 is connected with the control end of the DC-DC converter 5 through a key switch 12 and a second fuse 15, the lifting and tilting valve control switch 6 is connected with the cathode of the storage battery 1 through a switching circuit, and the switching circuit is used for switching the lifting and tilting valve control switch 6 or the conduction of the advancing and tilting switch 7 and the storage battery 1 according to the current closing states of the lifting and tilting valve control switch 6 and the advancing and tilting switch 7, so that the independent operation of switching the lifting and tilting valve control function or the walking function is realized.
The switching circuit of this embodiment adopts relay S1 and relay S2, the coil 81 of this relay S1 is connected in series between the negative electrode of the storage battery 1 and the output end of the lifting and tilting valve controlled switch 6, the coil 83 of the relay S2 is connected in series between the negative electrode of the storage battery 1 and the output end of the pedal switch 11, the input end of the lifting and tilting valve controlled switch 6 is connected with the control end of the DC-DC converter 5 through the contact 84 of the relay S2, and the input ends of the forward and backward switches 7 are connected with the control ends of the pedal switch 11 and the DC-DC converter 5 through the contact 82 of the relay S1. The coil 81 of the relay S1 and the coil 83 of the relay S2 are connected to the output terminals of the pump motor controller 2, the traveling motor controller 3, and the DC-DC converter 5 at the same time. The contact 82 of the relay S1 and the contact 84 of the relay S2 are normally closed contacts.
Further, a main switch KG is connected in series between the coil 81 of the relay S1, the coil 83 of the relay S2, and the negative electrode of the battery 1. When the main switch KG is disconnected, the traveling and lifting and tilting valve control functions exist at the same time, namely, traveling can be performed during traveling, traveling can be performed during lifting and tilting, whether the functions exist or not can be determined according to environmental factors and working conditions, and the working efficiency can be improved and the safe working conditions can be guaranteed. After the main switch KG is closed, an operation function is realized, or the main switch KG walks or is lifted and inclined, so that reliable and safe work guarantee is provided for safety managers in narrow spaces and crowded places.
Further, fuses 14 and 15 are connected in series to the output end of the contact 91 of the main contactor S3 and the output end of the key switch 12, respectively; the fuses 14 and 15 of the present embodiment employ resistors R1 and R2, respectively.
In the embodiment, the pump motor controller adopts a direct current pump motor controller with the model number of 1253-4804 to control the function of the pump motor M1 of the vehicle; the walking motor controller 3 adopts a walking motor controller with the model of 1236-5401 to control the function of the walking motor M2; wherein the voltage level of the DC-DC converter 5 is 48V-12V.
When the key switch 12 is closed, the storage battery 1 supplies control voltage to the walking controller 3 and the pump controller 2 through the resistor R2, the DC-DC converter 5 works, and the external circuit load 4 works under the control of the external circuit switch. The coil 92 of the main contactor S3 connected to the walking controller 3 is electrified at the same time of electrifying, the contact 91 of the main contactor S3 of the main road is closed, the forklift storage battery 1 outputs 48V voltage to directly supply power to the two controllers, and the controllers are electrified.
After the key switch 12 is closed, the main switch KG is opened, the relay S1 and the relay S2 do not work, the contact 82 of the relay S1 and the contact 84 of the relay S2 do not work, the closed state is kept, the lifting, tilting and walking functions are normal, and the relay S1 and the relay S2 do not interfere with each other and can work simultaneously; when the key switch 12 is closed and the main switch KG is closed, the lifting and tilting valve control switch 6 is operated, the coil 81 of the relay S1 and the cathode of the power supply 1 form a closed loop, the coil 81 of the relay S1 is electrified, so that the normally closed contact 82 of the relay S1 is disconnected, and the forward and backward switch 7 is closed at the moment, namely the whole vehicle cannot act no matter the forward or backward gear is opened or the pedal switch 11 is stepped on. After the lifting or tilting switch 7 is loosened, the coil 81 of the relay S1 is powered off, so that the normally closed contact 82 of the corresponding relay S1 is reset, a connection state is continuously formed between the normally closed contact 82 and the forward and backward switches 7, the forward and backward switches 7 are turned on, the pedal switch 11 is stepped on, and the whole vehicle is restored to the walking function; when the key switch 12 is closed and the main switch KG is closed, the forward or backward switch 7 is operated, the pedal switch 11 is trampled to travel in the whole vehicle, at this time, the output end of the pedal switch 11 has a high level, so that the coil 83 of the relay S2 and the negative electrode of the power supply 1 form a closed loop, the coil 83 of the relay S2 is electrified, the normally closed contact 84 of the relay S2 corresponding to the coil 83 is switched from the closed state to the open state, at this time, no matter the lifting or tilting switch 6 is operated, the pump controller 2 has no effect on the motor M1, namely, the lifting and tilting functions are limited. After the pedal switch 11 is released, the coil 83 of the relay S2 is de-energized, so that the normally closed contact 84 of the relay S2 corresponding to the coil is reset, and the coil and the lifting tilt switch 6 are continuously connected, and the lifting and tilting functions are restored.
The invention adopts a mode of adding a transition wire harness between a wire harness of a vehicle body and an electric component, and utilizes a relay and a contact control method, but is not limited to the design of a control scheme utilizing elements such as a relay, a contact and the like, such as a proximity switch, a light sensor, mechanical position limitation and the like. The walking and valve functions are independently operated; the lifting, tilting and walking functions are effective at the same time, the operation of the other function can be prevented when any functions such as lifting, tilting or walking are operated, and the safety performance of the forklift is greatly improved on the basis of not damaging the mechanical system and the original electrical system of the whole forklift.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (6)
1. The utility model provides an electric fork-lift truck operation control system, includes power (1), pump motor controller (2), walking motor controller (3) and DC-DC converter (5) that link to each other with load (4), be connected with on pump motor controller (2) and rise, tilt valve accuse switch (6), be connected with on walking motor controller (3) forward, back switch (7) and footboard switch (11), its characterized in that: the positive electrode of the power supply (1) is connected with the input end of the DC-DC converter (5) through the emergency stop switch (10), and is respectively connected with the positive electrode terminals of the pump motor controller (2) and the walking motor controller (3) through the contact (91) of the main contactor S3, the coil (92) of the main contactor S3 is connected with the walking motor controller (3), and the grounding ends of the DC-DC converter (5) and the walking motor controller (3) are connected with the negative electrode end of the power supply (1); the output end of the emergency stop switch (10) is connected with the control end of the DC-DC converter (5) through a key switch (12), the lifting and tilting valve control switch (6) is connected with the negative electrode of the power supply (1) through a switching circuit, and the switching circuit is used for switching the lifting and tilting valve control function or the walking function according to the current closing states of the lifting and tilting valve control switch (6) and the lifting and tilting valve control switch (7).
2. The electric forklift operation control system according to claim 1, wherein: the switching circuit comprises a relay S1 and a relay S2, wherein a coil (81) of the relay S1 is connected in series between the negative electrode of a power supply (1) and the output end of a lifting and tilting valve control switch (6), a coil (83) of the relay S2 is connected in series between the negative electrode of the power supply (1) and the output end of a pedal switch (11), the input end of the lifting and tilting valve control switch (6) is connected with the control end of a DC-DC converter (5) through a contact (84) of the relay S2, and the input ends of a forward switch (7) and a backward switch (7) are connected with the input end of the pedal switch (11) and the control end of the DC-DC converter (5) through a contact (82) of the relay S1.
3. The electric forklift operation control system according to claim 2, wherein: a main switch KG is connected in series between the coil (81) of the relay S1, the coil (83) of the relay S2 and the negative electrode of the power supply (1).
4. The electric forklift operation control system according to claim 2, wherein: the contact (82) of the relay S1 and the contact (84) of the relay S2 are normally closed contacts.
5. The electric forklift operation control system according to claim 1, wherein: the output end of the contact (91) of the main contactor S3 and the output end of the key switch (12) are respectively connected with a first fuse (14) and a second fuse (15) in series.
6. The electric forklift operation control system according to claim 5, wherein: the first fuse (14) adopts a resistor R1, and the second fuse (15) adopts a resistor R2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710510443.9A CN107215829B (en) | 2017-06-28 | 2017-06-28 | Electric fork truck operation control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710510443.9A CN107215829B (en) | 2017-06-28 | 2017-06-28 | Electric fork truck operation control system |
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| Publication Number | Publication Date |
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| CN107215829A CN107215829A (en) | 2017-09-29 |
| CN107215829B true CN107215829B (en) | 2023-05-02 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108455491A (en) * | 2018-03-14 | 2018-08-28 | 安徽合力股份有限公司 | A kind of electri forklift electric-control system with password startup function |
| CN108483335B (en) * | 2018-05-25 | 2023-11-17 | 美通重工有限公司 | Electric self-driven scissor lifting device and control method thereof |
| CN108974117A (en) * | 2018-09-28 | 2018-12-11 | 杭叉集团股份有限公司 | A kind of battery truck |
| CN112174035A (en) * | 2020-09-25 | 2021-01-05 | 深圳市欧铠智能机器人股份有限公司 | Intelligent automatic control system of laser forklift |
| CN114890343B (en) * | 2022-03-31 | 2023-05-16 | 徐州徐工特种工程机械有限公司 | Intelligent control unit and electric forklift |
| CN117302077B (en) * | 2023-11-29 | 2024-02-20 | 杭叉集团股份有限公司 | Safety control method, system and device for picking vehicle |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1272933A (en) * | 1968-07-26 | 1972-05-03 | Clark Stacatruc Ltd | Pulse control systems for electric motors |
| WO2009100578A1 (en) * | 2008-02-04 | 2009-08-20 | Zhejiang Jiali Technology Co., Ltd. | A full hydraulic ac electrical forklift |
| JP5140863B2 (en) * | 2010-08-31 | 2013-02-13 | 株式会社小松製作所 | Forklift engine control device |
| WO2013082802A1 (en) * | 2011-12-09 | 2013-06-13 | Zhang Yongsheng | Automatic control system for hydraulic fork lifter |
| CN203545600U (en) * | 2013-08-07 | 2014-04-16 | 宁波如意股份有限公司 | Electric forklift |
| CN207078983U (en) * | 2017-06-28 | 2018-03-09 | 安徽合力股份有限公司 | A kind of electri forklift operation control system |
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