WO2021012476A1

WO2021012476A1 - Method for controlling loading of airport catering truck

Info

Publication number: WO2021012476A1
Application number: PCT/CN2019/116218
Authority: WO
Inventors: 单萍; 马列
Original assignee: 江苏天一机场专用设备股份有限公司
Priority date: 2019-07-23
Filing date: 2019-11-07
Publication date: 2021-01-28
Also published as: CN110356580A

Abstract

A method for controlling loading of an airport catering truck, comprising: when a power battery drives loading work, driven supporting legs to be supported only when the state of the whole truck satisfies the conditions of the normal working mode; the rising operation of a compartment is effective only when the state of the supporting legs satisfies the requirement for stably supporting the airport catering truck; a platform can be effectively operated to extend forwards only when the compartment reaches a rising end position; after the platform is operated by a worker to extend out, determine whether an obstacle affecting the extension of the platform exists or not, if yes, stop the platform extending out, and if not, drive the platform to extend out; when the worker operates the compartment to descend, first retract the platform; after the platform is retracted to the stop position, the worker is allowed to operate the compartment to descend; when the compartment effectively descends, the worker can effectively operate a refrigeration compartment to descend; after the compartment is descended to the descending stop position, the worker is allowed to effectively start supporting leg withdrawing. The safety operation of a loading system can be ensured by arranging a compartment ascending and descending condition, a supporting leg position condition, a platform stretching and retracting condition, and a truck start driving condition.

Description

A method for controlling the upper loading of a catering vehicle

Technical field

The invention belongs to the field of aviation food vehicle control, and particularly relates to a method for controlling the bodywork of the aviation food vehicle.

Background technique

The existing catering vehicle's bodywork control method is mechanical control, and the speed adjustment mainly relies on the gearbox shifting. The speed adjustment inertia is large, the response speed is slow, the vibration noise is large, and the structure to achieve stepless speed change is complicated. If the driver operates the bodywork Mechanism shifting and mechanical hydraulic control make it difficult to grasp the best shifting time, the top load is not smooth enough, and the driver’s labor intensity is increased.

Summary of the invention

In order to solve the aforementioned shortcomings in the loading process of the existing catering vehicle, the present invention provides a control method for the loading of the catering vehicle to realize safe and accurate operation of the loading part and ensure accurate docking between the refrigerated compartment and the aircraft door.

In the normal working mode of the present invention, the high-voltage power battery drives the upper loading oil pump to work, controlling the entire upper loading work, setting the car body ascending and descending conditions, outrigger position conditions, platform expansion and contraction conditions, and vehicle starting conditions to ensure the safe operation of the uploading system .

In the present invention, when the refrigerating compartment is raised/lowered, the outriggers are retracted, the platform is retracted and the platform moves left and right, it is necessary to simultaneously press the specific operation button and the linkage button in the compartment or the ground linkage button. The purpose is to make the linkage button or The ground linkage button triggers the status signal of the bodywork to be connected to the controller so that the controller can detect the working state of the bodywork and realize real-time monitoring of the working state of the bodywork.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of the electric catering vehicle of the present invention;

Figure 2 is the ground operation box of the present invention;

Figure 3 is the box body operation box of the present invention;

Detailed ways

The switches and buttons of the present invention are not limited to traditional mechanical switches and mechanical buttons, and they also include operation options that can be touched on the screen.

The bodywork includes retracting the outriggers, lowering the outriggers, lifting the car body, lowering the car body, moving the platform to the left, moving the platform to the right, extending the platform, and retracting the platform.

The upper loading device of the aviation catering vehicle of the present invention includes an upper loading part 2, a lifter 3, an outrigger 4, a platform that can be extended back and forth and moving left and right, an upper loading refrigeration system, an upper loading oil pump motor, an upper loading oil pump and an upper loading controller; It includes a refrigerated compartment; the chassis 1 is connected with the upper part through a lifter; the upper-mounted refrigeration system controls the temperature of the refrigerated compartment;

The upper oil pump motor drives the upper oil pump. The high-voltage electric drive of the power battery drives the upper oil pump motor to control the upper oil pump to realize various uploading tasks. The upper oil pump is connected with the lifting hydraulic cylinder of the lifter, the outrigger driving hydraulic cylinder and the platform telescopic hydraulic cylinder and the platform left and right moving hydraulic cylinder oil circuit. The upper oil pump is the lifting and lowering of the car body, the retracting and lowering of the legs, and the platform. Extending, moving and retracting the platform left and right provide hydraulic power source.

The bodywork also includes an electric emergency pump. When the power battery fails or the power is insufficient, the electric emergency pump is driven by the low-voltage electricity of the on-board battery to complete the retraction of the platform, the lowering of the car body, and the retraction of the outriggers. Optionally, electric emergency The pump work can also realize the left and right movement of the platform; the electric emergency pump is connected with the lifting hydraulic cylinder of the hoist, the outrigger driving hydraulic cylinder and the driving device oil circuit of the platform, and the electric emergency pump is the lifting hydraulic of the hoist Cylinders, outriggers drive hydraulic cylinders and platform expansion and contraction to provide hydraulic power source.

The bodywork also includes a manual emergency pump. The staff can lower the car body and retract the outriggers by shaking the manual emergency pump, so that the food truck can quickly evacuate. The manual emergency pump is connected with the oil circuit of the lifting hydraulic cylinder of the lifter and the outrigger driving hydraulic cylinder. The manual emergency pump provides the power source for the lifting hydraulic cylinder of the lifter and the outrigger driving hydraulic cylinder.

The top-mounted controller and the top-mounted oil pump motor, electric emergency pump, car body up solenoid valve, car body down solenoid valve, outrigger retract solenoid valve, outrigger release solenoid valve, platform left solenoid valve and platform right solenoid valve, and platform The extension solenoid valve is electrically connected with the platform retracting solenoid valve, which controls the start and stop of the upper oil pump motor and the electric emergency pump, and controls the car body lifting solenoid valve, the car body lowering solenoid valve, the leg retracting solenoid valve, the leg release solenoid valve, and the platform left Move the solenoid valve and the platform to the right, and the platform extension solenoid valve and platform retract solenoid valve on and off.

Figure 2 shows the ground operation box. The ground operation box is located outside the refrigerated compartment, which is convenient for people on the ground to operate. The ground operation box is equipped with outrigger retract buttons, outrigger lower buttons, car body up buttons, car body down buttons and the ground Linkage button; the ground operation box also includes the first leg in place indicator light, the car body not lowered in place indicator light, the emergency electric pump button and the release protection switch.

Figure 3 shows the compartment operation box. The compartment operation box is located in the refrigerated compartment, which is convenient for the personnel in the refrigerated compartment. The compartment operation box is equipped with a platform forward button, a platform retract button, and a platform left button. Platform move right button, car body up button, car body down button and car body linkage button; the car body operation box also includes the second leg in place indicator light and emergency electric pump.

Press the ground linkage button or the car body linkage button to realize the bodywork controller to detect the status of the bodywork.

Working conditions for uploading in normal working mode:

When the vehicle controller judges that the vehicle is in a parked state, the uploading work conditions are satisfied, and the uploading work can be allowed to start, so that the uploading work cannot be started during the operation of the whole vehicle, and the safety of the uploading work is guaranteed.

The criterion for judging that the vehicle is in the parking state is to simultaneously satisfy the parking brake working, the parking gear and the driving motor speed at zero.

Specifically, the switch signal of the handbrake, the gear signal of the vehicle, and the speed signal of the drive motor are connected to the VCU and sent to the VCU. The VCU detects that the vehicle is not in the aforementioned parking state, then the VCU will not send the upload to the upload controller. Work instruction: The VCU detects that the vehicle is in the aforementioned parking state, and then sends an upload work instruction or a car body lowering instruction to the bodywork controller, and the bodywork controller allows the bodywork oil pump to be driven to start the uploading work.

Normal working mode:

(1) When the VCU judges that the vehicle status meets the aforementioned bodywork working conditions and simultaneously presses the ground linkage button and the outrigger lowering button, the ground linkage signal and the outrigger lowering signal send out a request for lowering the outrigger to the upper load controller;

(2) After the bodywork controller receives the outrigger release request operation, it controls the bodywork oil pump motor switch to turn on and the outrigger discharge solenoid valve to be energized to open, and the outrigger discharge solenoid valve to be energized to open the outrigger to drive the hydraulic cylinder oil circuit and the bodywork oil pump. The oil path between the two is connected, and the upper oil pump drives the outrigger to support;

(3) Real-time monitoring of the status of the outriggers, optionally, the outrigger position sensor signals are sent to the bodywork controller and/or VCU in real time; optionally, the first outrigger is in place and the second outrigger is in place to display The lights show the status of the outriggers.

(4) Only when the state of the outriggers meets the requirements for stably supporting the food truck, the next uploading operation is allowed, otherwise the next uploading operation is stopped;

Specifically, if the position of the outriggers is not in place, that is, when the position of the outriggers is not enough to support the food truck, the VCU will feed back to the bodywork controller to stop the next uploading operation. If the position of the outriggers is in place, that is, the position of the outriggers is stable. When supporting the food truck, the VCU will feed back to the bodywork controller to continue the next bodywork operation.

(5) Press the ground linkage button and the car body up button at the same time, or press the car body linkage button and the car body up button at the same time, the high-voltage power output from the power battery controls the upper oil pump motor switch to open and the car body up solenoid valve to open. , The body lifting solenoid valve is energized and opened to realize the oil passage between the lifting hydraulic cylinder oil circuit and the upper oil pump, and the upper oil pump drives the refrigerating body to rise;

(6) After the refrigerating compartment reaches the rising end position, press the compartment linkage button and the platform forward button at the same time, use the photoelectric position sensor to sense whether there is an obstacle that affects the platform extension, and stop the platform extension if any. If not, the bodywork controller realizes that the switch of the bodywork oil pump motor is turned on and the platform extension solenoid valve is energized and opened, and the bodywork oil pump drives the platform to extend.

Specifically, pressing the car body linkage button and the platform extension button at the same time, the platform extension button signal and the car body linkage button signal are sent to the bodywork controller, and the photoelectric sensor feeds back the signal to the bodywork controller and/or VCU. If the VCU determines that there is an obstacle that affects the extension of the platform, the bodywork controller will receive feedback from the VCU and stop the platform extension; if the VCU determines that there is no obstacle that affects the extension of the platform, the bodywork controller will receive the VCU Continue to operate the feedback, the bodywork controller drives the bodywork oil pump to extend the platform.

(7) When the VCU judges that the vehicle status meets the aforementioned uploading working conditions, and pressing the linkage button in the compartment and the platform retracting button at the same time, the uploading controller sends a platform retracting request; the uploading controller realizes that the oil pump motor switch is turned on and The platform shrinking solenoid valve is energized to open, and the upper oil pump drives the platform to shrink.

(8) The platform is retracted to the end position to make the refrigerating compartment lowering operation effective, that is, allowing the refrigerating compartment to descend.

Specifically, the platform position sensor feeds back the signal to the bodywork controller, and the bodywork controller sends the platform position status information to the VCU. If the platform is not retracted, the VCU feeds back to the bodywork controller to prevent the car from lowering; if the platform is retracted When it is in place, the VCU feeds back to the bodywork controller to allow the car to descend.

When the platform can move left and right, the platform is retracted to the end position and the platform has moved left and right to coincide with the center line of the compartment, and the lowering operation of the refrigerated compartment can be made effective.

(9) When the car body lowering operation is valid, operate the car body linkage button and the car body down button at the same time, the car body linkage signal and the car body descending signal are sent to the bodywork controller, and the bodywork controller realizes the upper oil pump motor switch is turned on and the body body is lowered. The solenoid valve is energized and opened, and the upper oil pump drives the refrigerating compartment to descend.

(10) Only when the refrigerating compartment is lowered to the lowering end position, can the operation of retracting legs be started.

Optionally, set the indicator that the car body is not lowered in place.

Specifically, the refrigerating compartment position signal is sent to the bodywork controller, and the bodywork controller sends a message to the VCU about the status information of the lowering position of the refrigerating compartment body. If the refrigerating body body does not descend to the lowering end position, the VCU feeds back The bodywork controller prevents the start of the leg operation; if the refrigerating compartment drops to a designated position, the VCU feeds back to the bodywork controller to allow the start of the leg operation.

(11) When the VCU judges that it is allowed to start the retracting leg operation, and pressing the ground linkage button and the outrigger retract button at the same time, the ground linkage signal and the outrigger retracting signal send a request for retracting legs to the upper loading controller, and the upper loading controller drives the station. The oil pump is installed to retract the support legs.

(12) Monitor the status of the outriggers in real time. If the outriggers are in position, the VCU sends a command to stop the work of the bodywork oil pump to the bodywork controller. The bodywork controller controls the switch of the bodywork oil pump motor to turn off and the motor speed of the bodywork oil pump becomes zero.

Optionally, the outrigger position sensor signal is sent to the bodywork controller and/or VCU in real time.

(13) The vehicle can start driving only when the switch of the upper oil pump motor is turned off, the vehicle is in the parking position, and the speed of the drive motor is zero.

Electric emergency mode:

After the catering truck has served the aircraft, if the power battery fails to work or the loading oil pump is damaged, the platform cannot be retracted, the car body is lowered and the outriggers are retracted in the normal working mode, and the vehicle cannot be evacuated from the work site. The emergency mode uses the on-board battery to drive an electric emergency pump to achieve platform retraction, car body lowering and outrigger retraction.

Among them, the power battery cannot work including the power battery is too low. specific

The electric emergency mode process is as follows:

(1) Turn on the main power switch of the electric emergency pump.

(2) Turn the release protection switch to the ON position on the ground operation box.

(3) In the compartment, press the emergency electric pump switch and the platform retract button on the compartment operation box at the same time, and install the controller to realize the electric emergency pump work and drive the platform to retract.

(4) In the car body, press the emergency electric pump switch and the car body down button on the car body operation box at the same time, and install the controller to realize the electric emergency pump work and drive the car body down.

(5) On the ground, press the emergency electric pump switch and the outrigger retract button on the ground operation box at the same time, and install the controller to realize the electric emergency pump work and drive the outrigger to retract.

(6) Use the front or rear towing device, and use the airport towing equipment to evacuate the food truck from the scene.

Manual emergency mode:

After the food truck has finished serving the aircraft, when it is found that the vehicle has no electricity, the power battery and storage battery are below the set value at this time, and the manual emergency mode is used.

The manual emergency mode workflow includes:

(1) Move the handle of the manual reversing valve to the lowering position of the car body, and shake the manual emergency pump up and down to emergency lower the car body.

(2) Move the handle of the manual reversing valve to the outrigger retracted position, and shake the manual pump up and down for emergency to retract the outriggers.

(3) Reset the manual reversing valve.

(4) Use the front or rear towing device and use the airport towing equipment to evacuate the food truck from the scene.

Claims

A method for controlling the bodywork of an aviation food vehicle, which is characterized in that:

When the power battery drives the bodywork:

When the vehicle state meets the aforementioned normal working mode conditions, the outrigger can be driven to support;

When the state of the outriggers meets the requirement of stably supporting the food truck, the lifting operation of the car body is effective;

When the car body reaches the ascending end position, the platform can be effectively extended;

After the staff operates the platform to extend, judge whether there is an obstacle that affects the extension of the platform, if there is, stop the extension of the platform, if not, drive the extension of the platform;

When the staff is operating the lowering of the car body, first contract the platform;

After the platform is retracted to the end position, the staff is allowed to operate the car to descend;

When the lowering operation of the compartment is effective, the staff can effectively operate the lowering of the refrigerated compartment;

Only when the car body descends to the descending termination position, the staff is allowed to effectively initiate the retraction of the outriggers.
The method according to claim 1, characterized in that: when the platform can move left and right, the platform retracts to the end position and the platform has moved left and right to coincide with the center line of the compartment, then the refrigerated compartment can be lowered. effective.
The method according to claim 1, characterized in that: turning on the main switch of the electric emergency pump power supply and operating the release protection switch, the uploading work is switched from the power battery drive to the on-board battery drive, and the on-board battery-driven uploading work includes platform shrinking. Back, the car body descends and the outriggers retract.
The method according to claim 3, characterized in that the work content of the vehicle-mounted battery-driven bodywork also includes moving the platform to the left and right.
The method according to claim 1, characterized in that: the manual reversing valve handle is switched to manual to complete the uploading work, and the worker can shake the manual emergency pump to lower the car body and retract the outriggers.
The method according to any one of claims 1 to 5, wherein the status of the outriggers is monitored in real time, and if the outriggers are retracted in place, the upper oil pump is stopped.
The method according to any one of claims 1 to 5, characterized in that: when the vehicle controller determines that the vehicle is in a parked state, the power battery drive bodywork working condition is satisfied.
The method according to any one of claims 1 to 5, wherein the criterion for determining that the vehicle is in a parked state is that the parking brake is in operation, the parking gear is in a parking position, and the rotation speed of the drive motor is zero.
The method according to any one of claims 1 to 5, characterized in that: the power battery drives the upper oil pump motor to work to realize the upper installation work, when the upper oil pump motor stops working, the vehicle is in the parking position, and the rotation speed of the drive motor is At zero hour, the vehicle can start driving.
The method according to any one of claims 1 to 5, characterized in that:

The catering vehicle is provided with a plurality of top loading operation buttons corresponding to different top loading operation contents;

The bodywork operations include retracting the outriggers, lowering the outriggers, raising the car body, lowering the car body, moving the platform to the left, moving the platform to the right, extending the platform and retracting the platform;

The catering vehicle is also provided with a linkage button, and the linkage button triggers the controller to detect the working state of the bodywork;

The uploading operation button and the linkage button are pressed simultaneously to effectively issue an uploading operation instruction.