A container reach crane engine speed control device and control method

Abstract

The present invention discloses a container front crane engine speed control device, including: a vehicle controller for controlling the vehicle, the input of the vehicle controller is connected with a throttle selection mode switch, an electronic throttle pedal, and an operating handle, and the output end of the vehicle controller is connected with a boom proportional solenoid valve and a spreader solenoid valve; a throttle mode selection switch and an electronic throttle pedal for selecting a throttle mode and controlling the throttle size; an operating handle for human-computer interaction, receiving an operation signal and controlling the action of the boom proportional solenoid valve; a boom proportional solenoid valve, the output end of which is connected to the front crane boom for controlling the action of the front crane boom; and a spreader solenoid valve, which is connected to the spreader for controlling the action of the spreader. The engine speed of the present application has good followability and is not easy to stall, and the operating efficiency of the vehicle is improved and the energy consumption is reduced. At the same time, the operating comfort of the driver is improved.

Description

Technical Field

[0001] The invention relates to a reach crane engine speed control technology, and in particular to a container reach crane engine speed control device and a control method. Background Art

[0002] Reach stacker is the abbreviation of container reach crane. It is a mobile crane used to load and unload containers. It is a kind of lifting equipment and can also be said to be a mobile machine. The working device of the reach stacker mainly consists of a telescopic and variable-length boom and a sling installed at the front end of the boom. The boom can be raised, lowered, extended and retracted, and the sling can be extended, side-shifted, rotated and locked. With the movement of the boom, it can realize the lifting and stacking of containers of different standards. The above actions of the boom and the sling are to operate the electric control handle to give a signal to the vehicle controller, and the vehicle controller outputs an electrical signal to the solenoid valve to make it move. Then, by stepping on the electronic accelerator pedal, the engine drives the hydraulic pump to input the hydraulic oil into each action cylinder through the solenoid valve to make the boom and the sling move. In this process, the driver needs to operate the electric control handle and step on the electronic accelerator pedal, which is labor-intensive. Moreover, when the driver is working with heavy loads, if he first operates the handle to open the solenoid valve and then steps on the electronic accelerator to accelerate the engine, the engine will stall due to the sudden increase in load; if he steps on the electronic accelerator first and then operates the handle, the engine energy consumption will increase.

[0003] In order to solve the above problems, load control of engine speed was used, that is, the engine speed was increased as the load increased. However, this control method resulted in poor engine speed follow-up and easy stalling. Moreover, when the load was small, it was still necessary to step on the electronic accelerator pedal to speed up the operation. Summary of the invention

[0004] The object of the present invention is to provide a container reach crane engine speed control device and control method to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A container reach crane engine speed control device, comprising:

[0007] A vehicle controller, used to control the vehicle, wherein the input of the vehicle controller is connected to a throttle selection mode switch, an electronic throttle pedal, and an operating handle, and the output of the vehicle controller is connected to a boom proportional solenoid valve and a hoisting device solenoid valve;

[0008] Throttle mode selection switch and electronic throttle pedal, used to select throttle mode and control throttle size;

[0009] The operating handle is used for human-machine interaction, receiving operating signals and controlling the action of the proportional solenoid valve of the boom;

[0010] A boom proportional solenoid valve, the output end of which is connected to the boom of the reach crane and is used to control the movement of the boom of the reach crane;

[0011] A spreader solenoid valve is connected to the spreader and is used to control the movement of the spreader.

[0012] As a further solution of the present invention: the boom proportional solenoid valve includes a boom lifting solenoid valve, a boom lowering solenoid valve, a boom extending solenoid valve, and a boom retracting solenoid valve.

[0013] As a further solution of the present invention: the sling solenoid valve includes a sling extension solenoid valve, a sling retraction solenoid valve, a sling rotation solenoid valve, a sling side shift solenoid valve, and a sling locking and unlocking solenoid valve.

[0014] As a further solution of the present invention: the operating handle includes analog outputs in four directions of the X and Y axes, which respectively control the extension, contraction and lifting and lowering proportional solenoid valve actions of the boom, and the speed of the action is linearly related to the angle of the operating handle in the X and Y directions.

[0015] As a further solution of the present invention: the vehicle controller is connected to a transmission controller and an engine controller through a bus, the transmission controller is provided with a transmission direction handle for controlling the transmission gear and forward or reverse gear, the transmission controller is provided with a pressure disengagement switch and a hand brake switch for controlling the transmission disengagement, and the output ends of the gear direction handle, the pressure disengagement switch and the hand brake switch are all connected to the input end of the transmission controller.

[0016] A method for controlling the engine speed of a container reach crane comprises the following steps:

[0017] Step 1: Check whether the throttle mode selection switch is closed. If it is closed, go to step 2; otherwise, go to step 6.

[0018] Step 2: judge the bus information from the gearbox controller. If the gear position value of the gear direction handle is not 0, it means that the bus communication between the vehicle controller and the gearbox controller is normal, then execute step 3, otherwise execute step 6;

[0019] Step 3, reading the gear direction information actually output to the gearbox by the gearbox controller, if the gear direction output to the gearbox is neutral, execute step 4, otherwise execute step 6;

[0020] Step 4, read the information of the operating handle that controls the boom and the spreader. If the operating handle sends the boom or spreader operation control information, transmit the information to the vehicle controller and execute step 5, otherwise execute step 6;

[0021] Step 5: The vehicle controller controls the action of the boom or the spreader according to the control signal received from the operating handle, and outputs an engine speed control signal at the same time, and compares the engine speed control signal output by the electronic accelerator pedal with the engine speed control information output by the vehicle controller, selects the larger engine speed information and transmits it to the engine controller to control the engine operation;

[0022] Step 6: The electronic accelerator pedal outputs an engine speed control signal.

[0023] As a further solution of the present invention: when the operating handle moves along the X or Y axis, the analog signal of the operating handle is input into the vehicle controller, and the vehicle controller outputs an electrical signal of corresponding magnitude to the boom proportional solenoid valve according to the magnitude of the analog quantity of the operating handle, so that the boom proportional solenoid valve is actuated, thereby actuating the boom. At the same time, the vehicle controller transmits a digital signal of corresponding magnitude to the engine controller through the bus according to the magnitude of the analog quantity of the operating handle to control the engine speed.

[0024] As a further solution of the present invention: the switch signal of the operating handle controlling the action of the spreader is input into the vehicle controller, and the vehicle controller adjusts different engine speeds according to different action speed requirements of the spreader.

[0025] As a further solution of the present invention: when the vehicle controller simultaneously receives the electronic accelerator pedal signal, the boom action signal issued by the operating handle, and the hoisting device action signal, it calculates three engine speed parameters according to the three control signals and compares their sizes, and takes the maximum value as the final value of the engine speed control.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. This application uses a control handle to control the movement of the boom or the spreader and sends out engine speed control information according to the movement of the control handle. By comparing the operation control signal with the engine control signal sent by the accelerator pedal speed, the highest engine speed signal is selected as the instruction of the real-time speed information of the generator, thereby effectively coping with various working conditions and effectively avoiding the occurrence of engine stalling due to sudden increase in load, so that the engine speed has good followability and is not easy to stall, and the vehicle's operating efficiency is improved and energy consumption is reduced. At the same time, the driver's operating comfort is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1This is a schematic diagram of the structure of the device of this embodiment;

[0029] Figure 2 This is a block diagram of the control device of this embodiment;

[0030] Figure 3 This is a flow chart of the control method of this embodiment.

[0031] In the figure: 1- spreader, 2- spreader solenoid valve, 3- electric control handle, 4- throttle mode selection switch, 5- transmission controller, 6- electronic throttle pedal, 7- engine controller, 8- boom proportional solenoid valve, 9- vehicle controller. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-2 In an embodiment of the present invention, a container reach crane engine speed control device includes:

[0034] The vehicle controller 9 is used to control the vehicle. The input of the vehicle controller 9 is connected to the throttle selection mode switch 4, the electronic throttle pedal 6, and the operating handle 3. The output of the vehicle controller 9 is connected to the boom proportional solenoid valve 8 and the hoisting device solenoid valve 2.

[0035] The throttle mode selection switch 4 and the electronic throttle pedal 6 are used to select the throttle mode and control the throttle size.

[0036] The operating handle 3 is used for human-computer interaction, receives the operating signal and controls the action of the boom proportional solenoid valve 8. The operating handle 3 includes analog outputs in four directions of the X and Y axes, which respectively control the extension, contraction and lifting and lowering proportional solenoid valve actions of the boom. The speed of the action is linearly related to the angle of the operating handle in the X and Y directions, that is, the greater the angle of the handle in one direction, the faster the corresponding control action in that direction.

[0037] The boom proportional solenoid valve 8, the output end of the boom proportional solenoid valve 8 is connected to the boom of the reach crane, and is used to control the movement of the boom of the reach crane. The boom proportional solenoid valve 8 includes a boom lifting solenoid valve, a boom lowering solenoid valve, a boom extending solenoid valve, and a boom retracting solenoid valve, which control the flow rate of the hydraulic oil and thus control the speed of the boom rising, lowering, extending, and retracting.

[0038] The sling solenoid valve 2 is connected to the sling 1 and is used to control the movement of the sling 1. The sling solenoid valve 2 includes a sling extension solenoid valve, a sling retraction solenoid valve, a sling rotation solenoid valve, a sling side shift solenoid valve, and a sling locking and unlocking solenoid valve.

[0039] The vehicle controller 9 is connected to the transmission controller 5 and the engine controller 7 through a bus. The transmission controller 5 is provided with a transmission direction handle for controlling the transmission gear and forward or reverse gear. The transmission controller 5 is provided with a pressure disengagement switch and a hand brake switch for controlling the transmission disengagement. The output ends of the gear direction handle, the pressure disengagement switch and the hand brake switch are all connected to the input end of the transmission controller 5.

[0040] See also Figure 3 , a method for controlling the engine speed of a container reach crane comprises the following steps:

[0041] Step 1, check whether the throttle mode selection switch 4 is closed, if closed, go to step 2, otherwise go to step 6;

[0042] Step 2, judging the bus information from the gearbox controller 5, if the gear position value of the gear direction handle is not 0, it means that the bus communication between the vehicle controller and the gearbox controller is normal, then executing step 3, otherwise executing step 6;

[0043] Step 3, reading the gear direction information actually output to the gearbox by the gearbox controller, if the gear direction output to the gearbox is neutral, execute step 4, otherwise execute step 6;

[0044] Step 4, reading the information of the operating handle 3 controlling the boom and the spreader, if the operating handle 3 sends the boom or spreader operation control information, the information is transmitted to the vehicle controller 9 and step 5 is executed, otherwise step 6 is executed;

[0045] When the operating handle 3 moves along the X or Y axis, the analog signal of the operating handle 3 is input to the vehicle controller 9. The vehicle controller 9 outputs an electrical signal of corresponding magnitude to the boom proportional solenoid valve 8 according to the magnitude of the analog value of the operating handle 3, so that the boom proportional solenoid valve 8 is actuated, thereby actuating the boom. At the same time, the vehicle controller 9 transmits a digital signal of corresponding magnitude to the engine controller 7 through the bus to control the engine speed according to the magnitude of the analog value of the operating handle 3. The switch signal of the operating handle 3 controlling the action of the spreader is input to the vehicle controller 9, and the vehicle controller 9 sets different engine speeds according to the different speed requirements of each action of the spreader.

[0046] Step 5, the vehicle controller 9 controls the action of the boom or the spreader according to the control signal received from the operating handle 3, and outputs the engine speed control signal through the action of the operating handle 3, and compares the engine speed control signal output by the electronic accelerator pedal with the engine speed control information output by the vehicle controller 9, selects the larger engine speed information to be transmitted to the engine controller 7 and controls the engine operation. When the vehicle controller 9 simultaneously receives the electronic accelerator pedal 6 signal, the boom action signal and the spreader action signal from the operating handle 3, it calculates the three engine speed parameters according to the three control signals and compares the sizes, and takes the maximum value as the final value of the engine speed control;

[0047] Step 6: The electronic accelerator pedal outputs an engine speed control signal.

[0048] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0049] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for controlling the engine speed of a container reach crane, characterized in that: include: A vehicle controller (9) is used to control the vehicle, wherein the input of the vehicle controller (9) is connected to a throttle selection mode switch (4), an electronic throttle pedal (6), and an operating handle (3), and the output of the vehicle controller (9) is connected to a boom proportional solenoid valve (8) and a sling solenoid valve (2); A throttle mode selection switch (4) and an electronic throttle pedal (6) are used to select a throttle mode and control the throttle level; An operating handle (3) is used for human-machine interaction, receives an operating signal and controls the action of a large arm proportional solenoid valve (8); A boom proportional solenoid valve (8), the output end of which is connected to the boom of the reach crane and is used to control the movement of the boom of the reach crane; A sling solenoid valve (2), the sling solenoid valve (2) being connected to the sling (1) and used for controlling the movement of the sling (1); When the vehicle controller (9) simultaneously receives the electronic accelerator pedal (6) signal, the boom motion signal and the spreader motion signal sent by the operating handle (3), it calculates three engine speed parameters according to the three control signals and compares their values, and takes the maximum value as the final value of the engine speed control; The control method comprises the following steps: Step 1, check whether the throttle mode selection switch (4) is closed, if closed, go to step 2, otherwise go to step 6; Step 2, judging the bus information from the gearbox controller (5), if the gear position value of the gear direction handle read is not 0, it means that the bus communication between the vehicle controller and the gearbox controller is normal, then executing step 3, otherwise executing step 6; Step 3, reading the gear direction information actually output to the gearbox by the gearbox controller, if the gear direction output to the gearbox is neutral, execute step 4, otherwise execute step 6; Step 4, reading information of the operating handle (3) for controlling the boom and the spreader, if it is read that the operating handle (3) sends boom or spreader operation control information, the information is transmitted to the vehicle controller (9) and step 5 is executed, otherwise step 6 is executed; Step 5, the vehicle controller (9) controls the movement of the boom or the spreader according to the control signal received from the operating handle (3), and outputs an engine speed control signal at the same time, and compares the engine speed control signal output by the electronic accelerator pedal with the engine speed control information output by the vehicle controller (9), selects the larger engine speed information and transmits it to the engine controller (7) to control the engine operation; Step 6: The electronic accelerator pedal outputs an engine speed control signal.

2. A container reach crane engine speed control method according to claim 1, characterized in that: The boom proportional solenoid valve (8) comprises a boom lifting solenoid valve, a boom lowering solenoid valve, a boom extending solenoid valve, and a boom retracting solenoid valve.

3. A container reach crane engine speed control method according to claim 1, characterized in that: The sling solenoid valve (2) comprises a sling extension solenoid valve, a sling retraction solenoid valve, a sling rotation solenoid valve, a sling lateral shift solenoid valve, and a sling locking and unlocking solenoid valve.

4. A container reach crane engine speed control method according to claim 1, characterized in that: The operating handle (3) comprises analog outputs in four directions of the X and Y axes, respectively controlling the extension, retraction and lifting and lowering proportional solenoid valve actions of the boom, and the speed of the action is linearly related to the angle of the operating handle in the X and Y directions.

5. The method for controlling the engine speed of a container reach crane according to claim 1, characterized in that: The vehicle controller (9) is connected to a transmission controller (5) and an engine controller (7) via a bus; the transmission controller (5) is provided with a transmission direction handle for controlling the transmission gear and forward or reverse gear; the transmission controller (5) is provided with a pressure disengagement switch and a hand brake switch for controlling the transmission disengagement; and the output ends of the gear direction handle, the pressure disengagement switch and the hand brake switch are all connected to the input end of the transmission controller (5).

6. A container reach crane engine speed control method according to claim 1, characterized in that: When the operating handle (3) moves along the X or Y axis, an analog signal of the operating handle (3) is input to the vehicle controller (9). The vehicle controller (9) outputs an electrical signal of a corresponding magnitude to the boom proportional solenoid valve (8) according to the magnitude of the analog value of the operating handle (3), so that the boom proportional solenoid valve (8) is actuated, thereby actuating the boom. At the same time, the vehicle controller (9) transmits a digital signal of a corresponding magnitude to the engine controller (7) through a bus according to the magnitude of the analog value of the operating handle (3) to control the engine speed.

7. The method for controlling the engine speed of a container reach crane according to claim 1, characterized in that: The switch signal of the operating handle (3) for controlling the action of the lifting device is input into the vehicle controller (9), and the vehicle controller (9) adjusts different engine speeds according to different action speed requirements of the lifting device.

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