A control system and control method for an extended tool of a hydraulic excavator

Abstract

The present invention discloses a control system for an extended tool of a hydraulic excavator, comprising: a whole machine controller, an extended tool control box, a control handle, a display, a GPS module, a solenoid valve and a tool. The extended tool control box is electrically connected to the whole machine controller, the control handle and the solenoid valve. The solenoid valve controls the operation of the tool. The whole machine controller is interconnected with the display, the GPS module and the extended tool control box through a CAN bus for data sharing, so as to realize the real-time monitoring and control of the working state of the tool expansion system and the protection of the system. The whole machine controller is connected to the hydraulic system of the hydraulic excavator, realizing the convenience and quickness of tool installation, improving the safety and stability of system operation, establishing a fault detection mechanism, realizing the safe operation of the system, realizing the automatic adaptation of the tool, with adjustable control parameters, making the control of the tool more accurate and smooth.

Description

Technical Field

[0001] The present invention relates to the field of construction machinery, and particularly to a control system and a control method for a hydraulic excavator expansion tool. Background Art

[0002] As an important construction machinery, excavators are widely used in various working places. Due to their excellent expandability, they have received more and more attention. Generally, the modification of excavators on the market directly takes power from the battery and connects with flying wires, resulting in messy wire harness routing. The flow rate and pressure need to be manually calibrated, and the pressure and flow rate control are inaccurate, which affects the controllability and fuel economy. At the same time, it causes the tool to work unstably and there are certain safety hazards. There have been many cases on the market where vehicles caught fire due to unauthorized installation, causing significant property losses. Therefore, the stability and safety of the excavator expansion tool need to be further improved. Summary of the Invention

[0003] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a control system and a control method for a hydraulic excavator expansion tool. By the automatic adaptation and standardized installation of the expansion tool, the safety and stability of the system are improved. When installing a tool, only need to connect the control tool solenoid valve to the expansion tool control box, and the expansion tool control box is connected to the whole machine controller through the bus. The expansion tool control box can forward the working state of the tool to the whole machine controller through the bus, and the whole machine controller forwards it to the display to realize the visualization of the working state of the installed tool. When a fault occurs during the operation of the tool, an alarm prompt is issued, and the display shows the fault signal, which can help the driver quickly judge the fault point and upload the fault information to the management system through GPS.

[0004] To achieve the above object, the technical solution adopted by the present invention is: A control system for a hydraulic excavator expansion tool, comprising: a whole machine controller, an expansion tool control box, a control handle, a display, a GPS module, a solenoid valve, and a tool. The expansion tool control box is electrically connected to the whole machine controller, the control handle, and the solenoid valve. The solenoid valve controls the action of the tool. The whole machine controller is connected to the display, the GPS module, and the expansion tool control box through the CAN bus to share data with each other, so as to realize the real-time monitoring and protection of the working state of the tool expansion system. The whole machine controller is connected to the hydraulic system of the hydraulic excavator.

[0005] Further, the expansion tool control box receives the signal of the control handle, identifies the action type, outputs a control signal to the solenoid valve, and controls the action of the tool; the expansion tool control box is internally provided with a monitoring circuit to monitor the output signal, realize the monitoring of faults, and upload the working state of the tool in real time through the CAN bus to realize the visualization of the tool operation, greatly improving the working efficiency of the driver.

[0006] Further, the signals of the control handle are connected to the extension tool control box to output action signals. The extension tool control box controls the actions of the tools according to the signals of the control handle. In actual operation, the entire handle of the control handle can be replaced. However, for the convenience of operation, only the handle head of the original hydraulic pilot handle can be replaced to achieve the control function.

[0007] Further, the solenoid valves include: a hydraulic main oil circuit control solenoid valve and a single-action control solenoid valve. The hydraulic main oil circuit control solenoid valve controls the oil supply of the entire extension tool system. The single-action control solenoid valve controls the single actions of the tools to control the specific actions of the tools. Only after the hydraulic main oil circuit control solenoid valve receives a signal and opens can the single-action control solenoid valve control the actions of the tools.

[0008] Further, the feedback signals of the control ends of the solenoid valves are connected to the extension tool control box to monitor the working states of the solenoid valves.

[0009] Further, the whole machine controller outputs signals according to the set types of tools to adjust the pressure and flow rate of the hydraulic system of the hydraulic excavator, precisely control the actions, improve the working stability and controllability of the system, and to a certain extent improve the fuel economy. The whole machine controller sends the working states of the tools collected through the bus to the display.

[0010] Further, the display shows the working states of the tools, sets indicator lights to monitor the working states of each action of the tools, selects the types of tools on the display, and the whole machine controller makes corresponding adjustments according to the types of tools.

[0011] Further, the GPS module transmits the working states and faults of the extension tool system back to the background management system to remotely monitor the working states of the current machine in real time.

[0012] A control method for a control system of a hydraulic excavator extension tool, the control method comprising:

[0013] The driver selects the corresponding tool type through the display. After the whole machine controller receives the signal from the display, the whole machine controller makes corresponding adjustments to the flow rate and pressure of the hydraulic system. The whole machine controller can make adaptive adjustments according to the feedback pressure and flow rate to make the system operate stably. When the control button of the control handle is pressed, the extension tool control box receives the signal, the control box outputs the corresponding control signal, the hydraulic main oil circuit control solenoid valve is powered on to supply oil to the extension tool, and the single-action control solenoid valve corresponding to the action of the control handle button is powered on, and the tool acts according to the signal. When the control button does not output a signal, the tool immediately stops acting;

[0014] After the display selects the corresponding tool, the display automatically jumps to the working state display interface of the tool, and the working state of the extended tool will be displayed on the interface. When the system is working properly, the working state indicator light of the system is green and always on. When each action is working, the corresponding working state will also be displayed on the interface. When the system fails, the fault indicator light is red and always on, and the fault type is scrolled and displayed on the display. Each action has a corresponding indicator light;

[0015] When the extended tool control box outputs a control signal, the solenoid valve is energized, the tool works normally, and the feedback signal is transmitted to the whole machine controller, and the system is normal; when the control end does not output a control signal, the solenoid valve is not energized, the tool does not work, and no feedback signal is transmitted to the whole machine controller, and the system is normal; when the extended tool control box does not output a control signal, the solenoid valve is energized, the feedback signal is transmitted to the whole machine controller, and the system fails; when the control end of the extended tool control box outputs a control signal, the solenoid valve is not energized, the tool does not work properly, and the feedback signal is transmitted to the whole machine controller, and the system fails.

[0016] The extended tool controller reserves input and output ports, which can meet the control requirements of various tools. There is no need to break the wire for installation on site, which increases safety and applicability.

[0017] The beneficial effects of the present invention are:

[0018] (1) The extended tool control box has the functions of fault detection and operation monitoring, forwards the monitored working state of the tool to the controller, and the controller forwards it to the instrument, realizing the visualization of the operation state and faults of the tool, helping the driver to more accurately understand the working state of the vehicle, and the driver can adjust the working parameters of the tool through the instrument to realize the personalization of tool control;

[0019] (2) The extended tool control system realizes the convenient and fast installation of the tool, improves the safety and stability of the system operation, establishes a fault detection mechanism, and realizes the safe operation of the system;

[0020] (3) The extended tool control method realizes the automatic adaptation of the tool, the control parameters are adjustable, and the control of the tool is more accurate and smooth. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the control system of the present invention;

[0022] Figure 2 It is a working flow chart of the present invention;

[0023] In the figure: 1. Whole machine controller; 2. Extended tool control box; 3. Control handle; 4. Display; 5. GPS module; 6. Hydraulic main oil circuit control solenoid valve; 7. Single action control solenoid valve; 8. Tool. Embodiment

[0024] To make the objectives, technical solutions and advantages of the present invention more comprehensible, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood, however, that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the scope of the present invention.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention.

[0026] As Figure 1 shown, a control system for a hydraulic excavator expansion tool includes: a whole machine controller 1, an expansion tool control box 2, a control handle 3, a display 4, a GPS module 5, a solenoid valve, and a tool 8. The expansion tool control box 2 is electrically connected to the whole machine controller 1, the control handle 3, and the solenoid valve. The solenoid valve controls the operation of the tool 8. The whole machine controller 1 is interconnected with the display 4, the GPS module 5, and the expansion tool control box 2 through a CAN bus for data sharing to achieve real-time monitoring and protection of the working state of the tool 8 expansion system. The whole machine controller is connected to the hydraulic system of the hydraulic excavator; the expansion tool control box 2 receives the signal of the control handle 3, identifies the action type, and outputs a control signal to the solenoid valve to control the operation of the tool 8; the expansion tool control box 2 has a monitoring circuit inside to monitor the output signal, realize the monitoring of faults, and upload the working state of the tool 8 in real time through the CAN bus to achieve the visualization of the operation of the tool 8, greatly improving the working efficiency of the driver.

[0027] The signal of the control handle 3 is connected to the expansion tool control box 2 to output an action signal. The expansion tool control box 2 controls the operation of the tool 8 according to the signal of the control handle 3. In actual operation, the entire control handle 3 can be replaced, but for the convenience of operation, only the handle head of the original hydraulic pilot handle can be replaced to achieve the control function.

[0028] The solenoid valves include a hydraulic main oil circuit control solenoid valve 6 and a single-action control solenoid valve 7. The hydraulic main oil circuit control solenoid valve 6 controls the oil supply of the entire extended implement 8 system. The single-action control solenoid valve 7 controls the single actions of the implement 8 and the body actions of the implement 8. Only after the hydraulic main oil circuit control solenoid valve 6 receives a signal and opens can the single-action control solenoid valve 7 control the actions of the implement 8. The feedback signal of the control end of the solenoid valve is connected to the extended implement control box 2 to monitor the working state of the solenoid valve. The whole machine controller outputs signals according to the set type of the implement 8 to adjust the pressure and flow of the hydraulic system of the hydraulic excavator, precisely control the actions, improve the working stability and controllability of the system, and to a certain extent improve the fuel economy. The whole machine controller sends the working state of the implement 8 collected through the bus to the display 4.

[0029] The display 4 shows the working state of the implement 8, sets indicator lights, and monitors the working state of each action of the implement 8. The type of the implement 8 is selected on the display 4, and the whole machine controller makes corresponding adjustments according to the type of the implement 8. The GPS module 5 transmits the working state and faults of the extended implement 8 system back to the background management system to remotely monitor the working state of the current machine in real time.

[0030] A control method for a control system of a hydraulic excavator extended implement 8 includes:

[0031] The driver selects the corresponding type of the implement 8 through the display 4. After the whole machine controller 1 receives the signal from the display 4, the whole machine controller 1 makes corresponding adjustments to the flow and pressure of the hydraulic system. The whole machine controller 1 can make adaptive adjustments according to the feedback pressure and flow to make the system operate stably. When the control button of the control handle 3 is pressed, the extended implement control box 2 receives the signal, the extended implement control box 2 outputs the corresponding control signal, the hydraulic main oil circuit control solenoid valve 6 is powered on to supply oil to the extended implement 8, and the single-action control solenoid valve 7 corresponding to the button action of the control handle 3 is powered on, and the implement 8 operates according to the signal. When the control button does not output a signal, the implement 8 immediately stops operating;

[0032] After the display 4 selects the corresponding implement 8, the display 4 automatically jumps to the working state display interface of the implement 8, and the working state of the extended implement 8 will be displayed on the interface. When the system is working properly, the working state indicator light of the system is green and always on. When each action is working, the corresponding working state of the display will also be displayed on the interface. When the system fails, the fault indicator light is red and always on, and the fault type is scrolled and displayed on the display 4. Each action has a corresponding indicator light, which greatly improves the efficiency of the driver in handling faults;

[0033] When the extension tool control box 2 outputs a control signal, the solenoid valve is energized, the tool 8 works normally, and the feedback signal is transmitted to the whole machine controller 1, and the system is normal; when the control end does not output a control signal, the solenoid valve is not energized, the tool 8 does not work, and no feedback signal is transmitted to the whole machine controller 1, and the system is normal; when the extension tool control box 2 does not output a control signal, the solenoid valve is energized, the feedback signal is transmitted to the whole machine controller 1, and the system fails; when the control end of the extension tool control box 2 outputs a control signal, the solenoid valve is not energized, the tool 8 does not work normally, and the feedback signal is transmitted to the whole machine controller 1, and the system fails.

[0034] The ordinary handle on the existing hydraulic excavator can be changed into a multi-functional handle by replacing the handle head, eliminating the process of handle disassembly; the controller of the extension tool 8 reserves input and output ports, which can meet the control requirements of various tools 8, without on-site wire-breaking installation, increasing safety and applicability.

[0035] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, or improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A control system for an extended tool of a hydraulic excavator, characterized in that, Comprising: An overall machine controller, an extended implement control box, a control handle, a display, a GPS module, a solenoid valve, and an implement. The extended implement control box is electrically connected to the overall machine controller, the control handle, and the solenoid valve. The solenoid valve controls the operation of the implement. The overall machine controller is interconnected with the display, the GPS module, and the extended implement control box through a CAN bus for data sharing to achieve real-time monitoring and protection of the working state of the implement expansion system. The overall machine controller is connected to the hydraulic system of the hydraulic excavator; The extended implement control box receives the signal from the control handle, identifies the action type, and outputs a control signal to the solenoid valve to control the operation of the implement; the extended implement control box has a monitoring circuit inside to monitor the output signal, realize the monitoring of faults, and upload the working state of the implement in real time through the CAN bus; The solenoid valve includes: a hydraulic main oil circuit control solenoid valve and a single-action control solenoid valve. The hydraulic main oil circuit control solenoid valve controls the oil supply of the entire extended implement system. The single-action control solenoid valve controls the single action of the implement to control the specific action of the implement. Only after the hydraulic main oil circuit control solenoid valve receives a signal and opens can the single-action control solenoid valve control the operation of the implement.

2. The control system of a hydraulic excavator expansion tool according to claim 1, characterized in that, The signal of the control handle is connected to the extended implement control box to output an action signal, and the extended implement control box controls the operation of the implement according to the signal of the control handle.

3. The control system of a hydraulic excavator expansion tool according to claim 1, characterized in that The feedback signal of the control end of the solenoid valve is connected to the extended implement control box to monitor the working state of the solenoid valve.

4. The control system of a hydraulic excavator expansion tool according to claim 1, characterized in that The overall machine controller outputs a signal according to the set type of the implement to adjust the pressure and flow rate of the hydraulic system of the hydraulic excavator for precise control of the action. The overall machine controller sends the collected working state of the implement to the display through the bus.

5. The control system of a hydraulic excavator expansion tool according to claim 1, characterized in that The display shows the working state of the implement, sets indicator lights to monitor the working state of each action of the implement, selects the type of the implement on the display, and the overall machine controller makes corresponding adjustments according to the implement type.

6. The control system of a hydraulic excavator expansion tool according to claim 1, characterized in that, The GPS module transmits the working state and faults of the extended implement system back to the background management system to remotely monitor the working state of the current machine in real time.

7. The control method of the control system of a hydraulic excavator expansion tool according to claim 1, characterized in that The control method includes: The driver selects the corresponding implement type through the display. After the overall machine controller receives the signal from the display, the overall machine controller makes corresponding adjustments to the flow rate and pressure of the hydraulic system. The overall machine controller can make adaptive adjustments according to the feedback pressure and flow rate to make the system operate stably. When the control button of the control handle is pressed, the extended implement control box receives the signal, the control box outputs a corresponding control signal, the hydraulic main oil circuit control solenoid valve is powered on to supply oil to the extended implement, and the single-action control solenoid valve corresponding to the action of the control handle button is powered on, and the implement operates according to the signal. When the control button does not output a signal, the implement immediately stops operating; After the display selects the corresponding tool, the display automatically jumps to the working state display interface of the tool, and the working state of the extended tool will be displayed on the interface. When the system is working properly, the working state indicator light of the system is green and always on. When each action is working, the corresponding working state will also be displayed on the interface. When the system fails, the fault indicator light is red and always on, and the fault type is scrolled on the display. There is a corresponding indicator light for the fault of each action; When the extended tool control box outputs a control signal, the solenoid valve is energized, the tool works normally, and the feedback signal is transmitted to the whole machine controller, and the system is normal; when the control end does not output a control signal, the solenoid valve is not energized, the tool does not work, and no feedback signal is transmitted to the whole machine controller, and the system is normal; when the extended tool control box does not output a control signal, the solenoid valve is energized, the feedback signal is transmitted to the whole machine controller, and the system fails; when the control end of the extended tool control box outputs a control signal, the solenoid valve is not energized, the tool does not work properly, and the feedback signal is transmitted to the whole machine controller, and the system fails.

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