CN110065912B - Linkage interlocking control system of electric forklift - Google Patents
Linkage interlocking control system of electric forklift Download PDFInfo
- Publication number
- CN110065912B CN110065912B CN201910429658.7A CN201910429658A CN110065912B CN 110065912 B CN110065912 B CN 110065912B CN 201910429658 A CN201910429658 A CN 201910429658A CN 110065912 B CN110065912 B CN 110065912B
- Authority
- CN
- China
- Prior art keywords
- lifting
- motor driver
- alternating current
- way valve
- oil cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Landscapes
- 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)
Abstract
The invention discloses an electric forklift linkage interlocking control system, and belongs to the technical field of intelligent control of special engineering machinery. Comprises an alternating current motor driver, a travelling mechanism, a travelling motor, a lifting hydraulic system and a gear pump; the lifting hydraulic system comprises a lifting multi-way valve, a lifting oil cylinder I and a lifting oil cylinder II; the alternating current motor driver is in control connection with the pump control motor and the walking motor; the pump control motor is connected with the gear pump in a control way, and is connected with a current sensor II; the walking motor is connected with a current sensor I; the lifting oil cylinder I and the lifting oil cylinder II are connected with a pressure sensor; the pressure sensor, the current sensor I and the current sensor II are connected to the alternating current motor driver. The linkage interlocking control system of the electric forklift can furthest protect the storage battery, can avoid safety accidents caused by misoperation, improves the operation efficiency of the electric forklift, reduces the energy consumption and improves the driving comfort.
Description
Technical Field
The invention relates to the technical field of electric forklifts, in particular to an electric forklifts linkage interlocking control system, and belongs to the technical field of intelligent control of special engineering machinery.
Background
At present, the electric fork lift truck is widely applied to agricultural production and industrial construction in the world, and is one of indispensable special engineering machinery, so that the requirements on an electric control system of the electric fork lift truck are higher and higher, and a traditional electric fork lift truck running system and a fork lifting system independently run, namely, the lifting system can be operated at will in the running process of the electric fork lift truck.
However, when the fork is lifted in the full-load running process of the electric forklift, the storage battery is required to release larger current, particularly in the full-load climbing process, the storage battery is easy to discharge beyond 1C, particularly the lead-acid storage battery, and the over-discharge is formed, so that the service efficiency and the service life of the storage battery are seriously influenced, and even the electric forklift is caused to roll over due to misoperation.
Although some electric forklifts require to prohibit lifting of the fork in the walking process, the operation efficiency of the electric forklifts can be seriously affected, the labor intensity of drivers is improved, fatigue is brought to the drivers, and the working efficiency is affected.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a linkage interlocking control system of an electric forklift.
The invention adopts the technical scheme that: the linkage interlocking control system of the electric forklift comprises a traveling motor for providing power for a traveling mechanism and a gear pump for providing power for a lifting hydraulic system; the lifting hydraulic system comprises a lifting multi-way valve, a lifting oil cylinder I and a lifting oil cylinder II;
the walking machine also comprises an alternating current motor driver, wherein the alternating current motor driver is in control connection with the pump control motor and the walking motor; the said
The pump control motor is connected with the gear pump in a control way, and is connected with the current sensor II;
The walking motor is connected with a current sensor I;
The lifting oil cylinder I and the lifting oil cylinder II are connected with a pressure sensor;
the pressure sensor, the current sensor I and the current sensor II are connected to the alternating current motor driver.
It is further: the gear pump is connected with an overflow valve and a one-way valve; the P port of the gear pump is respectively connected with the I port of the overflow valve, the oil inlet of the one-way valve and the F port of the lifting multi-way valve; an oil outlet of the one-way valve is connected with a G port of the lifting multi-way valve; the J port of the overflow valve is connected with the C port of the lifting multi-way valve;
one end of the lifting multi-way valve is connected with an operating rod;
A speed limiting valve is connected between the lifting multi-way valve and the lifting oil cylinder I and between the lifting multi-way valve and the lifting oil cylinder II; the port A of the speed limiting valve is connected with the port D of the lifting multi-way valve, and the port B of the speed limiting valve is connected with rodless cavities of the lifting oil cylinder I and the lifting oil cylinder II respectively.
The alternating current motor driver is XCMG to 105;
a storage battery is connected between the BAT+ end and the BAT-end of the alternating current motor driver;
The DI1 end of the alternating current motor driver is connected with a system running switch;
the DI2 end of the alternating current motor driver is connected with a lifting multi-way valve switch;
the DI3 end of the alternating current motor driver is connected with an inclined multi-way valve switch;
the +5V, AI end and the GND end of the alternating current motor driver are connected with the pressure sensor;
the +5V, AI end and the GND end of the alternating current motor driver are connected with the current sensor I;
the +5V, AI end and the GND end of the alternating current motor driver are connected with the current sensor II;
the RXD, TXD and GND ends of the alternating current motor driver are connected with a display screen;
The US, VS and WS ends of the alternating current motor driver are connected with the walking motor;
UM, VM and WM ends of the AC motor driver are connected with the pump control motor.
When the electric forklift is in the running process, the invention can limit the current of the fork lifting system according to the weight of the lifted goods, and can also directly limit the current of the fork lifting system, for example: when the lifting load exceeds 30% of rated load or the current of the electric forklift running system exceeds 200A, the lifting system is limited to be 30% of normal lifting current. The invention can also regulate and limit the current proportion according to the working condition through the display screen, thereby avoiding the over-discharge of the storage battery.
Compared with the prior art, the invention has the beneficial effects that: the linkage interlocking control system of the electric forklift can furthest protect the storage battery, meanwhile, safety accidents caused by misoperation can be avoided, the operation efficiency of the electric forklift is improved, the energy consumption is reduced, and the driving comfort is improved.
Drawings
FIG. 1 is a schematic diagram of the present invention;
In the figure: the device comprises a storage battery 1, a system operation switch 2, a lifting multi-way valve switch 3, an inclined multi-way valve switch 4, a pressure sensor 5, a current sensor I6, a current sensor II 7, a display screen 8, a travelling mechanism 9, a lifting multi-way valve 10, a one-way valve 11, an overflow valve 12, a hydraulic oil tank 13, a gear pump 14, a control rod 15, a speed limiting valve 16, a lifting oil cylinder I17, a lifting oil cylinder II 18, a travelling motor 19, a pump control motor 20 and an alternating current motor driver 21.
Detailed Description
The invention will be further described with reference to specific examples.
As shown in fig. 1, in the linkage and interlocking control system of the electric forklift, a traveling motor 19 is connected with a traveling mechanism 9 to provide power for the traveling mechanism 9. The gear pump 14 is connected in the lifting hydraulic system, provides a power source for the lifting hydraulic system, and the pump control motor 20 is controlled to be connected with the gear pump 14 for driving the gear pump 14 to operate.
The lifting hydraulic system comprises a lifting multi-way valve 10, a lifting oil cylinder I17 and a lifting oil cylinder II 18. The P port of the gear pump 14 is respectively connected with the I port of the overflow valve 12, the oil inlet of the one-way valve 11 and the F port of the lifting multi-way valve 10; the oil outlet of the one-way valve 11 is connected with the G port of the lifting multi-way valve 10; the J port of the overflow valve 12 is connected with the C port of the lifting multi-way valve 10. One end of the lifting multi-way valve 10 is connected with an operating rod 15, and the lifting multi-way valve 10 is controlled by the operating rod 15. The port A of the speed limiting valve 16 is connected with the port D of the lifting multi-way valve 10, and the port B of the speed limiting valve 16 is respectively connected with rodless cavities of the lifting oil cylinder I17 and the lifting oil cylinder II 18.
The pressure sensor 5 is arranged at PT ports of the lifting oil cylinders I17 and II 18 and is used for detecting system pressures of the lifting oil cylinders I17 and II 18 in real time so as to calculate lifting weight of the cargo fork. The traveling motor 19 is connected with a current sensor I6, and the current sensor I6 is used for detecting the running current of the traveling motor. The pump control motor 20 is connected with a current sensor II 7, and the current sensor II 7 is used for detecting the running current of the pump control motor 20.
The ac motor driver 21 is XCMG105,105;
The battery 1 is connected between BAT+ ends and BAT-ends of the alternating current motor driver 21;
The DI1 end of the AC motor driver 21 is connected with a system running switch 2;
the DI2 end of the alternating current motor driver 21 is connected with a lifting multi-way valve switch 3; the DI3 end of the AC motor driver 21 is connected with the inclined multiway valve switch 4; the lifting multi-way valve switch 3 and the inclined multi-way valve switch 4 are used for triggering the pump control motor to start;
the +5V, AI and GND end of the alternating current motor driver 21 are connected with the pressure sensor 5;
The +5V, AI end and the GND end of the alternating current motor driver 21 are connected with a current sensor I6;
the +5V, AI end and the GND end of the alternating current motor driver 21 are connected with a current sensor II 7;
The RXD, TXD and GND ends of the alternating current motor driver 21 are connected with the display screen 8;
the US, VS and WS ends of the alternating current motor driver 21 are connected with the walking motor 19;
the UM, VM and WM terminals of the ac motor driver 21 are connected with a pump motor 20.
After the self-checking, when the electric fork truck runs, the current of the fork lifting system is limited according to the weight of the lifted goods, the current of the fork lifting system can be directly limited,
In this embodiment:
When the lifting load exceeds 30% of rated load or the current of the electric forklift running system exceeds 200A, the lifting system is limited to be 30% of normal lifting current.
In the scheme of the embodiment, the current proportion can be regulated and limited through the display screen according to working conditions, so that the overdischarge of the storage battery is avoided; meanwhile, the scheme can avoid safety accidents caused by misoperation, improve the operation efficiency of the electric forklift, reduce energy consumption and improve driving comfort.
While the foregoing is directed to the preferred embodiments of the present invention, other and further modifications and changes may be made without departing from the principles of the present invention, such modifications and changes are to be regarded as being within the scope of the invention.
Claims (3)
1. The linkage interlocking control system of the electric forklift comprises a traveling motor (19) for providing power for a traveling mechanism (9) and a gear pump (14) for providing power for a lifting hydraulic system; the lifting hydraulic system comprises a lifting multi-way valve (10), a lifting oil cylinder I (17) and a lifting oil cylinder II (18);
the method is characterized in that:
The walking machine also comprises an alternating current motor driver (21), wherein the alternating current motor driver (21) is in control connection with the pump control motor (20) and the walking motor (19);
the pump control motor (20) is in control connection with the gear pump (14), and the pump control motor (20) is connected with the current sensor II (7);
The walking motor (19) is connected with a current sensor I (6);
The lifting oil cylinder I (17) and the lifting oil cylinder II (18) are connected with a pressure sensor (5);
the pressure sensor (5), the current sensor I (6) and the current sensor II (7) are connected to the alternating current motor driver (21).
2. The electric fork truck interlock control system according to claim 1, wherein: the gear pump (14) is connected with an overflow valve (12) and a one-way valve (11); the P port of the gear pump (14) is respectively connected with the I port of the overflow valve (12), the oil inlet of the one-way valve (11) and the F port of the lifting multi-way valve (10); an oil outlet of the one-way valve (11) is connected with a G port of the lifting multi-way valve (10); the J port of the overflow valve (12) is connected with the C port of the lifting multi-way valve (10);
One end of the lifting multi-way valve (10) is connected with an operating rod (15);
A speed limiting valve (16) is connected between the lifting multi-way valve (10) and the lifting oil cylinder I (17) and between the lifting multi-way valve and the lifting oil cylinder II (18); the A port of the speed limiting valve (16) is connected with the D port of the lifting multi-way valve (10), and the B port of the speed limiting valve (16) is respectively connected with rodless cavities of the lifting oil cylinder I (17) and the lifting oil cylinder II (18).
3. The electric fork truck interlock control system according to claim 1, wherein: the alternating current motor driver (21) is XCMG;
a storage battery (1) is connected between BAT+ ends of the alternating current motor driver (21);
the DI1 end of the alternating current motor driver (21) is connected with a system running switch (2);
The DI2 end of the alternating current motor driver (21) is connected with a lifting multiway valve switch (3);
The DI3 end of the alternating current motor driver (21) is connected with an inclined multiway valve switch (4);
the + V, AI1 and GND end of the alternating current motor driver (21) are connected with the pressure sensor (5);
the +5V, AI end and the GND end of the alternating current motor driver (21) are connected with the current sensor I (6);
the +5V, AI end and the GND end of the alternating current motor driver (21) are connected with the current sensor II (7);
the RXD, TXD and GND ends of the alternating current motor driver (21) are connected with a display screen (8);
the US, VS and WS ends of the alternating current motor driver (21) are connected with the walking motor (19);
UM, VM and WM ends of the AC motor driver (21) are connected with the pump control motor (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910429658.7A CN110065912B (en) | 2019-05-22 | 2019-05-22 | Linkage interlocking control system of electric forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910429658.7A CN110065912B (en) | 2019-05-22 | 2019-05-22 | Linkage interlocking control system of electric forklift |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110065912A CN110065912A (en) | 2019-07-30 |
| CN110065912B true CN110065912B (en) | 2024-05-28 |
Family
ID=67371311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910429658.7A Active CN110065912B (en) | 2019-05-22 | 2019-05-22 | Linkage interlocking control system of electric forklift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110065912B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19951706A1 (en) * | 1999-10-27 | 2001-05-10 | Henry Tunger | Electrical energy resource for electric fork lift truck has hydraulic fluid used for driving current generator during lowering of lifting forks for energy recovery |
| CN101711221A (en) * | 2008-02-04 | 2010-05-19 | 浙江佳力科技股份有限公司 | Full hydraulic AC electrical forklift |
| JP2015163022A (en) * | 2014-02-28 | 2015-09-07 | 日立建機株式会社 | work vehicle |
| JP2016108761A (en) * | 2014-12-03 | 2016-06-20 | 日立建機株式会社 | Work machine |
| CN107673282A (en) * | 2017-10-13 | 2018-02-09 | 安徽全柴集团有限公司 | Control system of electric forklift based on switched reluctance machines driving |
| CN108298474A (en) * | 2017-12-26 | 2018-07-20 | 浙江大学 | A kind of fork truck energy saving system with speed-regulating function |
| CN209906300U (en) * | 2019-05-22 | 2020-01-07 | 徐州徐工特种工程机械有限公司 | Electric fork-lift linkage interlocking control system |
-
2019
- 2019-05-22 CN CN201910429658.7A patent/CN110065912B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19951706A1 (en) * | 1999-10-27 | 2001-05-10 | Henry Tunger | Electrical energy resource for electric fork lift truck has hydraulic fluid used for driving current generator during lowering of lifting forks for energy recovery |
| CN101711221A (en) * | 2008-02-04 | 2010-05-19 | 浙江佳力科技股份有限公司 | Full hydraulic AC electrical forklift |
| JP2015163022A (en) * | 2014-02-28 | 2015-09-07 | 日立建機株式会社 | work vehicle |
| JP2016108761A (en) * | 2014-12-03 | 2016-06-20 | 日立建機株式会社 | Work machine |
| CN107673282A (en) * | 2017-10-13 | 2018-02-09 | 安徽全柴集团有限公司 | Control system of electric forklift based on switched reluctance machines driving |
| CN108298474A (en) * | 2017-12-26 | 2018-07-20 | 浙江大学 | A kind of fork truck energy saving system with speed-regulating function |
| CN209906300U (en) * | 2019-05-22 | 2020-01-07 | 徐州徐工特种工程机械有限公司 | Electric fork-lift linkage interlocking control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110065912A (en) | 2019-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105197840B (en) | A kind of Electro-hydraulic drive system for industrial vehicle | |
| RU2603811C2 (en) | Recuperative generator system for electric loader | |
| CN101711221B (en) | A full hydraulic AC electrical forklift | |
| CN102616705B (en) | Energy-saving forklift hydraulic system with energy recovery function | |
| CN101011942B (en) | Industrial vehicle with hybrid power | |
| CN108408617B (en) | Hydraulic wringing mill | |
| CN103950870A (en) | Forklift hydraulic system with energy recovery and double-pump oil supply functions | |
| CN202575822U (en) | Engineering machinery and winch hydraulic control system thereof | |
| CN201660015U (en) | Energy-saving hydraulic system for storage battery forklifts | |
| CN112594240B (en) | Hydraulic system of working device, control method and electric loader | |
| CN116062620A (en) | Auxiliary control hydraulic system of diesel monorail crane locomotive | |
| CN112357772B (en) | Upper limiting method for lifting hook | |
| CN110065912B (en) | Linkage interlocking control system of electric forklift | |
| CN110282581B (en) | Anti-tipping control system for electric forklift | |
| CN209906300U (en) | Electric fork-lift linkage interlocking control system | |
| CN200978188Y (en) | Engine negative torsional moment controlling device in enclosed hydraulic circuit crane | |
| CN202542790U (en) | Energy-saving forklift hydraulic system with energy recycling | |
| CN105114392A (en) | Oil cylinder, totally-closed hydraulic system with oil cylinders and control method | |
| CN113135223B (en) | Steering drive control system and engineering machinery | |
| CN112390158B (en) | Control method of emergency circuit electric control system | |
| CN203890013U (en) | Double-pump oil supply and energy recovery type forklift hydraulic system | |
| CN210366880U (en) | Goods rollover prevention control system of electric forklift | |
| CN201473244U (en) | Hydraulic system of pipelayer | |
| CN101993013B (en) | Hydraulic system for sideboom | |
| CN201009756Y (en) | Industry vehicle with hybrid drive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |