CN108584829B - Forklift work safety control system - Google Patents
Forklift work safety control system Download PDFInfo
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- CN108584829B CN108584829B CN201810343323.9A CN201810343323A CN108584829B CN 108584829 B CN108584829 B CN 108584829B CN 201810343323 A CN201810343323 A CN 201810343323A CN 108584829 B CN108584829 B CN 108584829B
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- control module
- inclination angle
- electromagnetic valve
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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
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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
- B66F9/07504—Accessories, e.g. for towing, charging, locking
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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
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention provides a forklift work safety control system, which comprises: the detection module is used for acquiring the height data or the inclination angle data of the portal and transmitting the height data or the inclination angle data to the control module; the hydraulic subsystem is used for receiving the instruction of the control module to drive the lifting of the portal frame or adjust the inclination angle of the portal frame; the first input module is used for providing a forklift leveling adjustment signal or a conventional operation mode signal; when the first input module gives a signal for adjusting the leveling of the forklift, the control module adjusts the work of the hydraulic subsystem according to the height data or the inclination angle data of the portal, which are acquired by the detection module, so as to drive the lifting of the portal or adjust the inclination angle of the portal. The invention overcomes the defects that goods are extruded and fall-damaged easily when the pallet fork of the existing forklift is not in a horizontal position or goods fall off and safety accidents are caused when the gantry of the forklift is in a forward tilting state.
Description
Technical Field
The invention relates to the field of industrial vehicles, in particular to a forklift work safety control system.
Background
Fork trucks are industrial handling vehicles, and refer to various wheeled handling vehicles that perform handling, stacking, and short-distance transport operations on piece pallet goods. It is commonly used for transportation of large warehouse goods, and is usually driven by an oil-burning engine or a battery.
The prior patent publication CN104943497 discloses a forward forklift, which is characterized in that during operation, the actual angle of a mast is difficult to be accurately determined due to the visual angle obstruction of a driver, when goods are stacked, the goods are easily extruded and fall and damaged due to the fact that the forks are not in the horizontal position, and when the mast of the forklift is in a forward tilting state, the goods fall and safety accidents are caused due to the fact that the goods fall off due to the lifting operation.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a forklift work safety control system, which overcomes the defects that goods are extruded and fall damaged easily when the pallet fork of the existing forklift is not in a horizontal position or the goods fall off and safety accidents are caused when the portal frame of the forklift is in a forward tilting state due to lifting operation.
The invention further aims to provide a forklift work safety control system, which overcomes the defect that the stability and the operation safety of the whole forklift are seriously influenced by forcibly lifting the rotating speed of an engine when the angle of a gantry cannot be determined by the conventional forklift.
(II) technical scheme
In order to solve the technical problem, the invention discloses a forklift work safety control system which is arranged in a forklift control room and used for controlling the inclination angle data of a forklift gantry to adjust the work of a hydraulic subsystem, and the forklift work safety control system comprises: the control module is respectively connected with the detection module, the hydraulic subsystem and the first input module; the detection module is used for acquiring portal height data or portal inclination angle data and transmitting the portal height data or the portal inclination angle data to the control module; the hydraulic subsystem is used for receiving the instruction of the control module to drive the lifting of the portal or adjust the inclination angle of the portal; the first input module is used for providing a signal for adjusting the leveling of the forklift or a signal for adjusting a conventional operation mode; when the first input module gives a signal for adjusting the leveling of the forklift, the control module adjusts the work of the hydraulic subsystem according to the height data or the inclination angle data of the portal, which are acquired by the detection module, so as to drive the lifting of the portal or adjust the inclination angle of the portal.
The invention uses the first input module to output signals to the control module to adjust the working mode of the forklift, and the control module adjusts the work of the hydraulic subsystem according to the portal height data or portal inclination angle data acquired by the detection module under different modes, thereby ensuring that when different operations are carried out, the invention limits the action of part of the hydraulic system when the working device is in an unstable state, such as lifting when the forward inclination angle is larger, and limits the operations of continuously improving the lifting height and increasing the forward inclination angle, thereby playing a role in protecting the safety of operating personnel and goods, and solving the defects that goods fall and safety accidents are caused by the lifting operation when the existing forklift fork is not in a horizontal position and is easy to cause goods extrusion and fall damage or the portal of the forklift is in the forward inclination state. The working modes in the invention include a normal operation mode and a fork leveling mode; wherein the fork leveling mode refers specifically to an operating condition that adjusts the angle of the forks (i.e., the mast inclination angle). Preferably, the control module in the invention adopts a main controller.
Preferably, the hydraulic subsystem comprises a hydraulic oil cylinder, and the hydraulic oil cylinder is used for controlling the inclination of the gantry; the gantry inclination angle sensor is fixedly connected with a hydraulic oil cylinder through a link mechanism.
Preferably, the first input module is a fork leveling switch;
when the fork leveling switch is turned off, the control module sets the forklift to be in a conventional operation mode;
when the fork leveling mechanism is closed, the control module sets the forklift to be in a fork leveling mode. Preferably, the fork leveling switch is a normally open contact type push button switch.
Preferably, the detection module comprises a gantry height switch and a gantry inclination angle sensor. The device comprises a portal frame, and is characterized in that an auxiliary amplitude amplification detection device is arranged at the fixed end of the portal frame and comprises a cylindrical barrel, the top end of the barrel is flush with the height of the portal frame, a metal wire rope is fixed at the top end of the barrel, a gravity cone is arranged at the tail end of the metal wire rope, an annular strip-shaped gas storage bag is fixed at the upper part of the gravity cone, and the maximum outer diameter of the gas storage bag is 3 times that of the gravity cone; helium is filled in the gas storage bag, and an opening is formed in the bottom of the cylinder body and communicated with the outside;
an air discharging pipe is arranged at the bottom end of the center in the gravity cone, a laser pen is fixed at the center of the air discharging pipe, and a gap is formed between the laser pen and the air discharging pipe to form a channel for discharging air; the top end of the gas release pipe is provided with a pair of gas inlet pipes for communicating a gas storage bag, the gas inlet pipes are also provided with electronic gas flow control valves, an annular battery bin is arranged in the gravity cone, uniformly configured batteries are arranged in the annular battery bin, and the batteries are electrically connected with the electronic gas flow and the laser pen;
the bottom of the cylinder body below the gravity cone is also provided with a semitransparent indicating film, the size of the indicating film is printed on the indicating film, an installation cavity is formed between the indicating film and the bottom wall of the cylinder body, the installation cavity is provided with a transmission device, a camera and a fixed power supply, and the fixed power supply is electrically connected with the camera and the transmission device; the transmission device is electrically connected with the camera and used for transmitting the image information of the camera to the mobile phone terminal of the driver. In the actual operation process, when the vibration amplitude of the portal frame is small, partial detection is not easy, but the damage to parts or unstable loading risk can still be brought, the auxiliary amplitude amplification detection device is arranged, the cylinder with the length equal to the height of the portal frame is arranged by utilizing the large height of the portal frame, the vibration amplitude or the shaking amplitude of the portal frame is greatly amplified by arranging the metal pull rope and the gravity cone inside, a driver can observe the vibration influence of the gravity cone through a mobile phone terminal to judge the micro vibration of the portal frame, so that the driver can selectively turn on a portal frame height switch according to the vibration information and gradually adjust the starting rotating speed or the lifting speed, and the falling of goods is avoided; the size of great gas storage bag plays the cushioning effect when the portal rocks greatly, prevents the damage of high accuracy gravity cone. The helium bag is used for reducing the downward application force of the gravity cone, and the back-flushing force generated by the helium sprayed out through the air release pipe further reduces the downward application force of the gravity cone. When the forklift moves, vibration noise is caused, the vibration amplitude of the gravity cone can be reduced by increasing gravity (more precisely, downward force application), and the noise caused by the vibration of the forklift is eliminated; conversely, the vibration amplitude of the gravity cone is increased by reducing the gravity of the gravity cone, so that the amplitude amplification sensitivity is enhanced.
Preferably, the door frame comprises an inner door frame component and an outer door frame component, the door frame height switch is a Hall type non-contact switch and is installed on the outer door frame component, and a metal induction strip matched with the door frame height switch is installed on the inner door frame component.
Preferably, the forklift is provided with an engine, the engine is electrically connected with the control module, and the control module is used for adjusting the rotating speed of the engine.
Preferably, the forklift work safety control system further comprises a second input module, the second input module is electrically connected with the control module, and the second input module is used for outputting signals to the control module to adjust the inclination angle of the pallet fork. The second input module of the present invention employs a backward tilt action switch.
Preferably, the forklift work safety control system further comprises a third input module, the third input module is electrically connected with the control module, and the third input module is used for outputting a signal to the control module to adjust the ascending or descending of the pallet fork. The third input module of the invention adopts a lifting action switch.
Preferably, when fork truck is conventional operation mode, control module is set up in order to receive behind detection module's portal height data and the portal inclination angle data, judges:
and if the height data of the door frame is smaller than the preset safety height and the inclination angle of the door frame is smaller than 90 degrees, the control module controls the rotating speed of the engine to be increased when the third input module does not output signals to the control module.
When the load of the working device is large, the lifting speed of the working device is very low under the condition that the rotating speed of the engine is not lifted through an accelerator pedal, and the engine is likely to be flamed out due to the fact that the external load is larger than the output power of the engine, so that the stability and the operation safety of the whole forklift are seriously influenced if the rotating speed of the engine is forcibly lifted when the angle of the gantry cannot be determined. According to the invention, when the pallet fork of the forklift is in a low position and is not in a forward tilting state for lifting, the rotating speed of the engine is actively lifted, the lifting efficiency is improved, and the engine is prevented from flameout. Preferably, when the lifting action switch is closed, the master controller sends out a TSC1 control command, and the rotating speed of the engine is increased from a low idle speed (generally 750 n/min) to a high idle speed (1500 n/min) in a speed control mode.
Preferably, the hydraulic subsystem further comprises a main oil path, a descending loop and a multi-way valve assembly, wherein the multi-way valve assembly comprises a main oil path unloading electromagnetic valve and a descending oil path unloading electromagnetic valve;
the main oil way unloading electromagnetic valve is arranged on the main oil way to provide power for all operations of the multi-way valve except descending; the descending oil way unloading electromagnetic valve is arranged on the descending loop to provide power for controlling the manual descending operation of the multi-way valve; the main oil way unloading electromagnetic valve and the descending oil way unloading electromagnetic valve are both electrically connected with a control module, and the control module is used for controlling the opening or closing of the main oil way unloading electromagnetic valve or the descending oil way unloading electromagnetic valve. Preferably, the multi-way valve assembly is a direct-acting multi-way valve with high-pressure unloading, lifting self-locking and manual descending functions, the two electromagnetic valves are used for controlling a hydraulic system to work, the main oil way unloading electromagnetic valve is used for controlling hydraulic oil way input of the multi-way valve and providing power for all actions of the multi-way valve except descending actions, and the descending oil way unloading electromagnetic valve is used for controlling oil way output of a descending loop of the multi-way valve, namely controlling the manual descending function of the multi-way valve.
Preferably, when fork truck is conventional operation mode, control module is set up in order to receive behind detection module's portal height data and the portal inclination angle data, judges:
if the height data of the door frame is larger than the preset safety height and the inclination angle of the door frame is smaller than 90 degrees, the main oil way unloading electromagnetic valve and the descending oil way unloading electromagnetic valve are kept open;
if the height data of the door frame is larger than the preset safety height and the inclination angle of the door frame is larger than or equal to 90 degrees, the main oil way unloading electromagnetic valve is kept closed and the descending oil way unloading electromagnetic valve is opened; or when the second input module outputs a signal to the control module to adjust the inclination angle of the fork and the third control module part does not output a signal, the control module keeps the main oil way unloading electromagnetic valve and the descending oil way unloading electromagnetic valve both open.
Preferably, when fork truck was fork leveling mode, control module is set up with can receive detection module and portal inclination angle data after, judges:
if the inclination angle of the gantry is less than 90 degrees, the main oil way unloading electromagnetic valve and the descending oil way unloading electromagnetic valve are both kept open;
if the inclination angle of the gantry is larger than or equal to 90 degrees, the main oil way unloading electromagnetic valve is closed, and the descending oil way unloading electromagnetic valve is opened; or when the second input module outputs a signal to the control module to adjust the inclination angle of the fork and the third control module part does not output a signal, the main oil way unloading electromagnetic valve and the descending oil way unloading electromagnetic valve are both opened.
(III) advantageous effects
The invention provides a forklift work safety control system, which has the following advantages:
1. the invention uses the first input module to output signals to the control module to adjust the working mode of the forklift, and the control module adjusts the work of the hydraulic subsystem according to the portal height data or portal inclination angle data acquired by the detection module under different modes, thereby ensuring that when different operations are carried out, the invention limits the action of part of the hydraulic system when the working device is in an unstable state, such as lifting when the forward inclination angle is larger, and limits the operations of continuously improving the lifting height and increasing the forward inclination angle, thereby playing a role in protecting the safety of operating personnel and goods, and solving the defects that goods fall and safety accidents are caused by the lifting operation when the existing forklift fork is not in a horizontal position and is easy to cause goods extrusion and fall damage or the portal of the forklift is in the forward inclination state.
2. According to the invention, when the pallet fork of the forklift is in a low position and is not in a forward tilting state for lifting, the rotating speed of the engine is actively lifted, the lifting efficiency is improved, and the engine is prevented from flameout.
3. In the actual operation process, when the vibration amplitude of the portal frame is small, partial detection is not easy, but the damage to parts or unstable loading risk can still be brought, the auxiliary amplitude amplification detection device is arranged, the cylinder with the length equal to the height of the portal frame is arranged by utilizing the large height of the portal frame, the vibration amplitude or the shaking amplitude of the portal frame is greatly amplified by arranging the metal pull rope and the gravity cone inside, a driver can observe the vibration influence of the gravity cone through a mobile phone terminal to judge the micro vibration of the portal frame, so that the driver can selectively turn on a portal frame height switch according to the vibration information and gradually adjust the starting rotating speed or the lifting speed, and the falling of goods is avoided; the size of great gas storage bag plays the cushioning effect when the portal rocks greatly, prevents the damage of high accuracy gravity cone. The helium bag is used for reducing the application force of the gravity cone, and the downward application force of the gravity cone is further reduced by the recoil force generated by the helium sprayed out through the gas release pipe. When the forklift moves, vibration noise is caused, the vibration amplitude of the gravity cone can be reduced by increasing downward force, and the noise caused by the vibration of the forklift is eliminated; conversely, increasing the vibration amplitude of the gravity cone by reducing the downward force applied by the gravity cone increases the amplitude amplification sensitivity.
Drawings
Fig. 1 is a side view schematically showing the forklift according to embodiment 2 of the present invention;
fig. 2 is a schematic top view of a forklift according to embodiment 2 of the present invention;
fig. 3 is a control module flow diagram of a forklift work safety control system according to embodiment 2 of the invention;
fig. 4 is a schematic view of a fork leveling switch mounting structure of a forklift work safety control system according to embodiment 2 of the present invention;
fig. 5 is a partial enlarged structural schematic view of a mast of the forklift work safety control system according to embodiment 2 of the present invention;
fig. 6 is a partial enlarged structural schematic diagram of a hydraulic oil cylinder of the forklift work safety control system according to embodiment 2 of the invention;
fig. 7 is a partially enlarged structural schematic view of a multi-way valve assembly of a forklift operation safety control system according to embodiment 2 of the present invention.
Fig. 8 is a schematic structural view of an auxiliary amplitude amplification detection device of a forklift operation safety control system according to embodiment 2 of the present invention;
fig. 9 is a schematic structural diagram of a battery compartment of an auxiliary amplitude amplification detection device of a forklift operation safety control system according to embodiment 2 of the present invention;
fig. 10 is an enlarged cross-sectional view of a gravity cone of an auxiliary amplitude enlargement detection device of a forklift operation safety control system according to embodiment 2 of the present invention;
fig. 11 is a schematic view of a translucent film structure of an auxiliary amplitude amplification detection device of a forklift operation safety control system according to embodiment 2 of the present invention.
1. A detection module; 2. a first input module; 3. a control module; 4. a hydraulic subsystem;
2-1, inclining an operating handle; 2-2, a fork leveling switch; 3-1, an inner gantry component; 3-2, an outer gantry component; 3-3, a gantry height switch; 3-4, metal induction strips; 4-1, a hydraulic oil cylinder; 4-2, a link mechanism; 4-3, a gantry inclination angle sensor; 5-1, a joystick; 5-2, a lifting action switch; 5-3, a multi-way valve assembly; 6. a main oil way unloading electromagnetic valve; 7. a descending oil way unloading electromagnetic valve; 8. an engine; 9. a second input module; 10. a third input module; 11. an auxiliary amplitude amplification detection device; 12. a barrel; 13. a wire rope; 14. a gravity cone 15, a gas storage bag; 16. an opening; 17. discharging the air pipe; 18. a laser pen; 19. a channel; 20. an electronic gas flow control valve; 21. a battery compartment; 22. a battery; 23. an indicator film; 24. a transmission device; 25. a camera; 26. a fixed power supply; 27. an air inlet pipe; 100. a gantry; 200. a fork.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1: the invention provides a forklift work safety control system which is arranged in a forklift control room and used for controlling the work of a forklift gantry inclination angle data adjusting hydraulic subsystem, and the forklift work safety control system comprises: the device comprises a detection module 1, a hydraulic subsystem 4, a control module 3 and a first input module 2, wherein the control module is respectively connected with the detection module, the hydraulic subsystem and the first input module; the detection module is used for acquiring portal height data or portal inclination angle data and transmitting the portal height data or the portal inclination angle data to the control module; the hydraulic subsystem is used for receiving the instruction of the control module to drive the lifting of the gantry 100 or adjust the inclination angle of the gantry; the first input module is used for providing a signal for adjusting the leveling of the forklift or a signal for adjusting a conventional operation mode; when the first input module gives a signal for adjusting the leveling of the forklift, the control module adjusts the work of the hydraulic subsystem according to the height data or the inclination angle data of the portal, which are acquired by the detection module, so as to drive the lifting of the portal or adjust the inclination angle of the portal.
The working modes in the invention include a normal operation mode and a fork leveling mode; wherein the fork leveling mode is specifically directed to an operating condition that adjusts the angle of the forks 200 (i.e., mast inclination angle). The control module in the invention adopts a main controller.
Example 2: as shown in fig. 1, 2, 3, 4 and 5, the present invention provides a forklift work safety control system, disposed in a forklift control room, for controlling the work of a forklift mast inclination angle data adjusting hydraulic subsystem, including: the system comprises a detection module 1, a hydraulic subsystem 4, a control module 3 and a first input module 2. The detection module is used for acquiring portal height data or portal inclination angle data and transmitting the portal height data or the portal inclination angle data to the control module; the detection module comprises a gantry height switch 3-3 and a gantry inclination angle sensor 4-3. The hydraulic subsystem is used for receiving the instruction of the control module to drive the lifting of the portal frame or adjust the inclination angle of the portal frame; the hydraulic subsystem further comprises a main oil way, a descending loop and a multi-way valve assembly 5-3, wherein the multi-way valve assembly comprises a main oil way unloading electromagnetic valve 6 and a descending oil way unloading electromagnetic valve 7; the hydraulic subsystem comprises a hydraulic oil cylinder 4-1, and the hydraulic oil cylinder is used for controlling the inclination of the gantry; the gantry inclination angle sensor is fixedly connected with a hydraulic oil cylinder through a link mechanism 4-2.
The main oil way unloading electromagnetic valve is arranged on the main oil way to provide power for all operations of the multi-way valve except descending; the descending oil way unloading electromagnetic valve is arranged on the descending loop to provide power for controlling the manual descending operation of the multi-way valve; the main oil way unloading electromagnetic valve and the descending oil way unloading electromagnetic valve are both electrically connected with a control module, and the control module is used for controlling the opening or closing of the main oil way unloading electromagnetic valve or the descending oil way unloading electromagnetic valve. The multi-way valve assembly is a direct-acting multi-way valve with high-pressure unloading, lifting self-locking and manual descending functions, a hydraulic system is controlled to work through two electromagnetic valves, a main oil way unloading electromagnetic valve controls hydraulic oil way input of the multi-way valve and provides power for all actions of the multi-way valve except descending actions, and a descending oil way unloading electromagnetic valve controls oil way output of a descending loop of the multi-way valve, namely controls the manual descending function of the multi-way valve.
The control module is electrically connected with the detection module and the hydraulic subsystem; the first input module is electrically connected with the control module; the forklift is provided with an engine 8, the engine is electrically connected with a control module, and the control module is used for adjusting the rotating speed of the engine. The speed regulation of the engine in the invention is realized by an engine controller on the engine.
The forklift work safety control system further comprises a second input module 9, the second input module is electrically connected with the control module, and the second input module is used for outputting signals to the control module to adjust the inclination angle of the pallet fork. The second input module adopts a backward tilting action switch.
The forklift work safety control system further comprises a third input module 10, the third input module is electrically connected with the control module, and the third input module is used for outputting signals to the control module to adjust the lifting or descending of the pallet fork. The third input module of the invention adopts a lifting action switch 5-2.
The first input module is used for providing a forklift leveling adjustment signal or a normal operation mode signal; when the first input module gives a signal for adjusting the leveling of the forklift, the control module adjusts the work of the hydraulic subsystem according to the height data or the inclination angle data of the portal, which are acquired by the detection module, so as to drive the lifting of the portal or adjust the inclination angle of the portal. The control module in the invention adopts a main controller. The first input module is a fork leveling switch 2-2; when the fork leveling switch is turned off, the control module sets the forklift to be in a conventional operation mode; when the fork leveling mechanism is closed, the control module sets the forklift to be in a fork leveling mode. The fork leveling switch adopts a normally open contact type button switch.
The door frame comprises an inner door frame component 3-1 and an outer door frame component 3-2, the door frame height switch is a Hall type non-contact switch and is installed on the outer door frame component, and a metal induction strip 3-4 matched with the door frame height switch is installed on the inner door frame component. When the Hall type non-contact switch detects the metal induction strip, the gantry height switch is disconnected; otherwise, the height switch of the door frame is in a closed state.
As shown in fig. 8, 9, 10 and 11, an auxiliary amplitude amplification detection device 11 is mounted on the fixed end of the gantry, the auxiliary amplitude amplification detection device includes a cylindrical barrel 12, the top end of the barrel is flush with the height of the gantry, a metal wire rope 13 is fixed on the top end of the barrel, a gravity cone 14 is arranged at the tail end of the metal wire rope, an annular and long-strip-shaped gas storage bag 15 is fixed on the upper portion of the gravity cone, and the maximum outer diameter of the gas storage bag is 3 times that of the gravity cone; helium is filled in the gas storage bag, and an opening 16 is formed in the bottom of the cylinder body and communicated with the outside;
an air discharging pipe 17 is arranged at the bottom end of the center in the gravity cone, a laser pen 18 is fixed at the center of the air discharging pipe, and a gap is formed between the laser pen and the air discharging pipe to form a channel 19 for discharging air; the top end of the gas release pipe is provided with a pair of gas inlet pipes 27 for communicating a gas storage bag, the gas inlet pipes are also provided with electronic gas flow control valves 20, an annular battery bin 21 is arranged in the gravity cone, batteries 22 which are uniformly arranged are arranged in the annular battery bin, and the batteries are electrically connected with electronic gas flow and a laser pen;
a semitransparent indicating film 23 is further arranged at the bottom of the cylinder body below the gravity cone, the size is printed on the indicating film, an installation cavity is formed between the indicating film and the bottom wall of the cylinder body, the installation cavity is provided with a transmission device 24, a camera 25 and a fixed power supply 26, and the fixed power supply is electrically connected with the camera and the transmission device; the transmission device is electrically connected with the camera and used for transmitting the image information of the camera to the mobile phone terminal of the driver. The transmission device in this embodiment may be a data line. The auxiliary amplitude amplification detection device of the embodiment is installed on the outer gantry. The electronic gas flow control valve can be detached from the gravity cone to be manually adjusted, and can also be externally connected by a connecting wire and adjusted by a programmable logic controller.
When fork truck was conventional operation mode, control module is set up in order to receive behind detection module's the portal height data and the portal inclination angle data, judges:
and if the height data of the door frame is smaller than the preset safety height and the inclination angle of the door frame is smaller than 90 degrees, the control module controls the rotating speed of the engine to be increased when the third input module does not output signals to the control module. In the embodiment, when the lifting action switch is closed, the master controller sends out a TSC1 control command, and the rotating speed of the engine is increased from a low idle speed (generally 750 n/min) to a high idle speed (1500 n/min) in a speed control mode.
When fork truck was conventional operation mode, control module is set up in order to receive behind detection module's the portal height data and the portal inclination angle data, judges:
if the height data of the door frame is larger than the preset safety height and the inclination angle of the door frame is smaller than 90 degrees, the main oil way unloading electromagnetic valve and the descending oil way unloading electromagnetic valve are kept open;
if the height data of the door frame is larger than the preset safety height and the inclination angle of the door frame is larger than or equal to 90 degrees, the main oil way unloading electromagnetic valve is kept closed and the descending oil way unloading electromagnetic valve is opened; or when the second input module outputs a signal to the control module to adjust the inclination angle of the fork and the third control module part does not output a signal, the control module keeps the main oil way unloading electromagnetic valve and the descending oil way unloading electromagnetic valve both open.
When fork truck was fork leveling mode, control module is set up in order to receive detection module and portal inclination angle data after, judges:
if the inclination angle of the gantry is less than 90 degrees, the main oil way unloading electromagnetic valve and the descending oil way unloading electromagnetic valve are both kept open;
if the inclination angle of the gantry is larger than or equal to 90 degrees, the main oil way unloading electromagnetic valve is closed, and the descending oil way unloading electromagnetic valve is opened; or when the second input module outputs a signal to the control module to adjust the inclination angle of the fork and the third control module part does not output a signal, the main oil way unloading electromagnetic valve and the descending oil way unloading electromagnetic valve are both opened.
When this embodiment is implemented, when fork truck just started, can be through adjusting the gas that emits that comes of electronic control valve, make the downward applied force (gravity after slowing down) of gravity awl reduce, the vibration range of gravity awl has been increased, the camera passes through image information transmission to driver's cell-phone on transmission device, the driver judges the vibration range of gravity awl through the image signal of the laser pen of observing the gravity awl on instructing the film, adjust the speed that engine speed or portal take off and land step by step, avoided the goods to drop because of sudden start.
When the Hall type non-contact switch detects the metal induction strip, the gantry height switch is disconnected; otherwise, the height switch of the door frame is in a closed state.
When the fork leveling switch is switched off, the fork leveling switch is in a conventional operation mode, the gantry height switch is switched on, namely when the working height of the working device is low, the two paths of electromagnetic valves in the multi-way valve assembly are normally powered, and at the moment, all functions of controlling actions can be realized. When the fork height switch is switched off, the main controller can judge the current inclination angle of the gantry according to the input signal of the gantry angle sensor, and if the inclination angle is smaller than 90 degrees, the main controller can perform inclination and lifting operation; when the forward tilting angle is more than or equal to 90 degrees, the power supply of the main oil way unloading electromagnetic valve on the multi-way valve assembly is cut off, the working device only supports two operations at the moment, namely, the descending control function and the backward tilting operation, and when the backward tilting action switch is closed and the lifting action switch is disconnected, the power supply of the main oil way unloading electromagnetic valve is recovered.
When the fork leveling switch is switched off, only when the portal height switch is switched on, namely the working height of the working device is low, the inclination angle fed back by the portal angle sensor is smaller than 90 degrees, and when the lifting action switch is switched off, the main controller sends out a control instruction to lift the rotating speed of the engine from low idle speed to high idle speed in a speed control mode.
When the fork leveling switch is closed, the fork leveling operation mode is entered, the main controller can judge the current inclination angle of the gantry according to the input signal of the gantry angle sensor, if the inclination angle is smaller than 90 degrees, the leveling can be carried out through the inclination control handle of the direct-acting type multi-way valve, and before the fork does not reach the horizontal position, the main oil way unloading electromagnetic valve and the descending oil way unloading electromagnetic valve normally supply power; when the pallet fork reaches the horizontal position or the current inclination angle is larger than 90 degrees, the power supply of the main oil way unloading electromagnetic valve is cut off, only descending operation and backward tilting operation can be carried out, when the backward tilting action switch is closed and the lifting action switch is disconnected, the power supply of the main oil way unloading electromagnetic valve is recovered, and in the process, the pallet fork moves from the position larger than 90 degrees to the horizontal position and does not cut off the power supply of the main oil way unloading electromagnetic valve.
The above embodiments are only used for illustrating the present invention, and the structure, connection mode and the like of each component can be changed, and all equivalent changes and improvements made on the basis of the technical scheme of the present invention should not be excluded from the protection scope of the present invention.
Claims (6)
1. The utility model provides a fork truck work safety control system, sets up in the fork truck control room for the work of control fork truck portal inclination angle data adjustment hydraulic subsystem, its characterized in that includes:
the control module is respectively connected with the detection module, the hydraulic subsystem and the first input module;
the detection module is used for acquiring portal height data or portal inclination angle data and transmitting the portal height data or the portal inclination angle data to the control module;
the hydraulic subsystem is used for receiving the instruction of the control module to drive the lifting of the portal or adjust the inclination angle of the portal;
the first input module is used for providing a signal for adjusting the leveling of the forklift or a signal for adjusting a conventional operation mode;
when the first input module gives a signal for adjusting the leveling of the forklift, the control module adjusts the work of the hydraulic subsystem according to the height data or the inclination angle data of the gantry, which are acquired by the detection module, so as to drive the lifting of the gantry or adjust the inclination angle of the gantry;
the first input module is a fork leveling switch;
when the fork leveling switch is turned off, the control module sets the forklift to be in a conventional operation mode;
when the fork leveling machine is closed, the control module sets the forklift to be in a fork leveling mode;
the second input module is electrically connected with the control module and is used for outputting a signal to the control module so as to adjust the inclination angle of the fork;
the fork lifting device comprises a fork lifting mechanism, a control module and a third input module, wherein the fork lifting mechanism is used for lifting a fork, and the third input module is electrically connected with the control module and is used for outputting a signal to the control module to adjust the lifting or descending of the fork;
the hydraulic subsystem further comprises a main oil way, a descending loop and a multi-way valve assembly, wherein the multi-way valve assembly comprises a main oil way unloading electromagnetic valve and a descending oil way unloading electromagnetic valve;
the main oil way unloading electromagnetic valve is arranged on the main oil way to provide power for all operations of the multi-way valve except descending; the descending oil way unloading electromagnetic valve is arranged on the descending loop to provide power for controlling the manual descending operation of the multi-way valve; the main oil way unloading electromagnetic valve and the descending oil way unloading electromagnetic valve are both electrically connected with a control module, and the control module is used for controlling the opening or closing of the main oil way unloading electromagnetic valve or the descending oil way unloading electromagnetic valve.
2. The forklift operational safety control system of claim 1, wherein the detection module comprises a mast height switch and a mast inclination angle sensor; the device comprises a portal frame, and is characterized in that an auxiliary amplitude amplification detection device is arranged at the fixed end of the portal frame and comprises a cylindrical barrel, the top end of the barrel is flush with the height of the portal frame, a metal wire rope is fixed at the top end of the barrel, a gravity cone is arranged at the tail end of the metal wire rope, an annular strip-shaped gas storage bag is fixed at the upper part of the gravity cone, and the maximum outer diameter of the gas storage bag is 3 times that of the gravity cone; helium is filled in the gas storage bag, and an opening is formed in the bottom of the cylinder body and communicated with the outside;
an air discharging pipe is arranged at the bottom end of the center in the gravity cone, a laser pen is fixed at the center of the air discharging pipe, and a gap is formed between the laser pen and the air discharging pipe to form a channel for discharging air; the top end of the gas release pipe is provided with a pair of gas inlet pipes for communicating a gas storage bag, the gas inlet pipes are also provided with electronic gas flow control valves, an annular battery bin is arranged in the gravity cone, uniformly configured batteries are arranged in the annular battery bin, and the batteries are electrically connected with the electronic gas flow and the laser pen;
the bottom of the cylinder body below the gravity cone is also provided with a semitransparent indicating film, the size of the indicating film is printed on the indicating film, an installation cavity is formed between the indicating film and the bottom wall of the cylinder body, the installation cavity is provided with a transmission device, a camera and a fixed power supply, and the fixed power supply is electrically connected with the camera and the transmission device; the transmission device is electrically connected with the camera and used for transmitting the image information of the camera to the mobile phone terminal of the driver.
3. The forklift operation safety control system according to claim 1 or 2, wherein the forklift is provided with an engine, the engine is electrically connected with a control module, and the control module is used for adjusting the rotating speed of the engine.
4. The system of claim 1, wherein the control module is configured to receive the mast height data and mast tilt angle data from the detection module and determine, when the truck is in the normal operating mode:
and if the height data of the door frame is smaller than the preset safety height and the inclination angle of the door frame is smaller than 90 degrees, the control module controls the rotating speed of the engine to be increased when the third input module does not output signals to the control module.
5. The system of claim 4, wherein the control module is configured to receive the mast height data and mast tilt angle data from the detection module and determine, when the truck is in the normal operating mode:
if the height data of the door frame is larger than the preset safety height and the inclination angle of the door frame is smaller than 90 degrees, the main oil way unloading electromagnetic valve and the descending oil way unloading electromagnetic valve are kept open;
if the height data of the door frame is larger than the preset safety height and the inclination angle of the door frame is larger than or equal to 90 degrees, the main oil way unloading electromagnetic valve is kept closed and the descending oil way unloading electromagnetic valve is opened; or when the second input module outputs a signal to the control module to adjust the inclination angle of the fork and the third control module part does not output a signal, the control module keeps the main oil way unloading electromagnetic valve and the descending oil way unloading electromagnetic valve both open.
6. The system of claim 4, wherein the control module is configured to receive the data from the detection module and the mast tilt angle and determine, when the truck is in the fork leveling mode:
if the inclination angle of the gantry is less than 90 degrees, the main oil way unloading electromagnetic valve and the descending oil way unloading electromagnetic valve are both kept open;
if the inclination angle of the gantry is larger than or equal to 90 degrees, the main oil way unloading electromagnetic valve is closed, and the descending oil way unloading electromagnetic valve is opened; or when the second input module outputs a signal to the control module to adjust the inclination angle of the fork and the third control module part does not output a signal, the main oil way unloading electromagnetic valve and the descending oil way unloading electromagnetic valve are both opened.
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| CN201810343323.9A CN108584829B (en) | 2018-04-17 | 2018-04-17 | Forklift work safety control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109307605B (en) * | 2018-11-05 | 2024-03-29 | 安徽合力股份有限公司 | Integral type portal frame test device for simulating angle of inclined cylinder of forklift |
| 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 |
| CN110028022A (en) * | 2019-05-13 | 2019-07-19 | 浙江加力仓储设备股份有限公司 | A kind of hydraulic valve bank control system and the intelligent carrier-and-stacker with it |
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