Vehicle-carrying electric supporting equipment and leveling control system thereof

Abstract

The invention provides vehicle-mounted electric supporting equipment and a leveling control system thereof. The vehicle-mounted electric supporting equipment comprises a supporting leg assembly, the four supporting leg assemblies are installed at the four corners of the vehicle respectively, each supporting leg assembly is connected to the control box through a cable, and a tilt angle sensor is further installed on the vehicle. According to the invention, current change caused by motor load working condition change when the supporting leg extends out to touch the ground and withdraws to be in place is used as a detection signal for supporting leg leveling, and a current signal is fed back through a built-in driver for judgment, so that extension and retraction in-place judgment of the electric supporting equipment is carried out, and supporting and leveling of the whole vehicle are realized; the use of components and interfaces is reduced, and the design cost and the maintenance cost of the system are greatly reduced; and one-key full-automatic supporting and folding are adopted, so that the working intensity of operators is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to a vehicle-carrying electric supporting device and a leveling control system thereof. Background Art

[0002] Most of the existing electric support equipment are external sensors. In system design, the types of components and electrical interfaces increase, which leads to an increase in the number of cables and electrical connectors, and an increase in design costs. In later use, the sensors are exposed to complex environments such as severe cold, mold, high temperature and high humidity for a long time, and need to be regularly inspected and replaced, which has high maintenance costs. The cost of the product and later maintenance are the main factors that determine whether the electric support equipment is competitive in the market. For example, CN115095566A discloses an integrated servo motor pump leveling leg mechanism for vehicles, which uses a servo motor pump leveling leg instead of an electric leg leveling mechanism, so that it can achieve a large load output. However, it uses a hydraulic sensor in the leg as a monitoring period for whether the leg is leveled, so its control system needs to add an additional pressure sensor interface, and the accuracy of the pressure sensor needs to be regularly tested and maintained, which increases its cost. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a vehicle-mounted electric support device and a leveling control system thereof.

[0004] The present invention is achieved through the following technical solutions.

[0005] The present invention provides a vehicle-carrying electric supporting device, comprising a leg assembly; four leg assemblies are respectively installed on the four corners of the vehicle, each leg assembly is respectively connected to a control box via a cable, and an inclination sensor is also installed on the vehicle; the leg assembly comprises a leveling leg, the lower end of the leveling leg is hinged with a hinge support, the telescopic end of the leveling leg is processed with a thread and assembled on the output end of the transmission pair, the input end of the transmission pair is connected to the reducer via a rotating shaft, the reducer is driven by a servo motor, and the input end of the reducer is also provided with a hand-cranked mechanism.

[0006] A leveling control system for vehicle-mounted electric support equipment comprises a control box, wherein a signal input end of the control box is respectively connected to a handheld remote controller and an inclination sensor, and a signal output end of the control box is respectively connected to a servo motor on each leg.

[0007] The control box is also connected to an AC380V power supply, and a power conversion module is also arranged in the control box. The power conversion module converts the AC380V power supply into a DC600V power supply and transmits it to the servo motors respectively.

[0008] The control box includes a PLC controller, a 220V to 28V power module, a first 380V to 600V power module, and a second 380V to 600V power module. The PLC controller communicates with the inclination sensor and the servo motor on each leg through CAN.

[0009] The 220V to 28V power supply module supplies power to the PLC and the inclination sensor.

[0010] The control box is also equipped with a display screen, which can display the operating status of the servo motor and the inclination sensor, fault alarm and other working information.

[0011] The control box is also provided with automatic operation and single-step operation buttons, an emergency stop button and a system indicator light. The operator sends operation instructions to the controller through the panel buttons or the handheld remote control.

[0012] The PLC is provided with a leveling control program, which causes current changes according to changes in the motor load conditions when the legs are extended to touch the ground and retracted into place. The change feeds back current signals to the control box through the built-in driver of the servo motor, and the control box outputs different currents to achieve leveling and support of the entire vehicle.

[0013] The control box communicates with the built-in driver via RS422 communication.

[0014] The handheld remote controller is provided with an ascending, descending and emergency stop button. When the handheld remote controller issues an ascending or descending command, the control box automatically adjusts to the specified height and levels through a one-key leveling program. When an emergency stop command is issued, the servo motor stops running immediately.

[0015] The beneficial effects of the present invention are as follows: according to the change in current caused by the change in the motor load condition when the outriggers are extended to touch the ground and retracted into place, the change is used as a detection signal for outrigger leveling, and the built-in driver feedback current signal is used to judge whether the electric support equipment is extended or retracted into place, so as to achieve support and leveling of the whole vehicle. Since no external sensors are required, the use of components and interfaces is reduced, which greatly reduces the system design cost and maintenance cost; one-button fully automatic support and retraction is adopted, which reduces the workload of operators and improves work efficiency; the use of electric cylinders + controllers + handheld remote controls and other equipment is used, which is not only used for support and leveling during vehicle assembly, commissioning and maintenance, and mission testing, but also can replace hardware according to different usage scenarios to be suitable for a wider market. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the control system principle of the present invention;

[0017] Figure 2 It is a schematic diagram of the communication principle of the control box of the present invention;

[0018] Figure 3 It is a schematic diagram of the support leg structure of the present invention;

[0019] Figure 4 It is a schematic diagram of the leveling structure of the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the control box control panel of the present invention;

[0021] Figure 6 The figure is a schematic diagram of the key structure of the handheld remote controller of the present invention.

[0022] In the figure: 1-transmission pair, 2-hand crank mechanism, 3-reducer, 4-servo motor, 5-leveling leg, 6-hinge support, 7-control box, 8-tilt sensor, 9-cable, 10-leg assembly. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0024] A vehicle-mounted electric support device includes a leg assembly 10; four leg assemblies 10 are respectively installed on the four corners of the vehicle, each leg assembly 10 is connected to a control box 7 via a cable 9, and an inclination sensor 8 is also installed on the vehicle; the leg assembly 10 includes a leveling leg 5, the lower end of the leveling leg 5 is hinged with a hinge support 6, the telescopic end of the leveling leg 5 is processed with a thread and assembled on the output end of a transmission pair 1, the input end of the transmission pair 1 is connected to a reducer 3 via a rotating shaft, the reducer 3 is driven by a servo motor 4, and the input end of the reducer 3 is also provided with a hand-cranked mechanism 2.

[0025] The drive system completes the extension and retraction of the legs according to the control instructions issued by the controller. When extended and retracted to the correct position, the motor changes from no-load to load, the current changes, and the driver feeds back the current change signal to the controller to complete the extension and retraction of the electric support equipment.

[0026] The control system mainly includes PLC controller, display screen, motor drive system, integrated servo motor, electric push rod, inclination sensor, etc. The PLC controller is the controller of the entire control system, responsible for receiving and issuing control instructions to drive the motor, completing the driver and inclination sensor signal acquisition and sending it to the display screen; the system has self-test and online status monitoring functions, fault detection and diagnosis functions, fault location to independent components, and the display screen can display the operating status of the servo motor and inclination sensor, fault alarm and other working information. The system has two types: fully automatic one-key control mode and emergency working mode. Fully automatic one-button control: one-button support and withdrawal of the whole vehicle, the support equipment control box issues support or withdrawal instructions, and automatically completes the vehicle leveling and vehicle withdrawal actions. Emergency working mode: manual operation can be performed in an emergency state to achieve emergency withdrawal.

[0027] The operating interface of the support equipment control box is equipped with a power button, emergency stop button and fault alarm indicator light. The operator can send operating instructions through the buttons on the support equipment control box panel, including automatic operation, single-step operation and emergency stop; the system can display the execution process of each action, the detection data of the inclination sensor, and show the final status. When the system is debugged, the vehicle adjustment parameters are displayed, and the system fault detection information is provided, and the motor working status and the actuator are in place are displayed.

[0028] The power distribution system of the supporting equipment control box is mainly composed of two AC220V to DC28V power modules and one AC380V to DC600V power module. The system is powered by the mains. After the system is powered on, the DC28V power module mainly supplies power to the controller, tilt sensor and circuit breaker, and the two DC600V power modules supply power to the left front and right front outriggers and the left rear and right rear outrigger motors respectively.

[0029] When the support equipment control box is used for control, power on the electric control system. After the support equipment control box is powered on and self-checked, the display screen shows the normal state. The panel sends the automatic support or withdrawal command to the controller, and the controller sends the command to the drive system through the CAN bus. The drive system controls the electric cylinder to extend or withdraw, and realizes the support leveling and withdrawal of the electric support equipment. In addition, the button command in the single-step operation area can also be used to realize the single-step support and withdrawal control of each leg.

[0030] When using a handheld remote control, the handheld remote control is powered on. After the handheld remote control completes the power-on self-test, the display screen shows the normal state. The handheld remote control panel sends an automatic support or withdrawal command to the controller, and the controller sends the command to the drive system through RS422 communication to achieve support leveling and withdrawal of the electric support equipment.

[0031] Emergency working mode: When the control box or handheld remote controller of the supporting equipment fails, emergency evacuation can be achieved through manual operation. Figure 2 As shown, the rotating mechanism supports and retracts the legs. At this time, the limit protection of the electric cylinder only relies on the mechanical limit of the worm gear itself.

Claims

1. A vehicle-carrying electric support device, comprising a leg assembly (10), characterized in that: Four leg assemblies (10) are respectively installed on the four corners of the vehicle, and each leg assembly (10) is connected to a control box (7) via a cable (9). The vehicle is also equipped with an inclination sensor (8); the leg assembly (10) includes a leveling leg (5), the lower end of the leveling leg (5) is hinged with a hinge support (6), the telescopic end of the leveling leg (5) is threaded and assembled on the output end of the transmission pair (1), the input end of the transmission pair (1) is connected to a reducer (3) via a rotating shaft, the reducer (3) is driven by a servo motor (4), and the input end of the reducer (3) is also provided with a hand-cranking mechanism (2).

2. A leveling control system for controlling the vehicle electric support device according to claim 1, characterized in that: It comprises a control box, wherein the signal input end of the control box is respectively connected to the handheld remote control and the inclination sensor, and the signal output end of the control box is respectively connected to the servo motor on each leg.

3. The leveling control system according to claim 2, characterized in that: The control box is also connected to an AC380V power supply. A power conversion module is provided in the control box. The power conversion module converts the AC380V power supply into a DC600V power supply and transmits the power to the servo motors respectively.

4. The leveling control system according to claim 2, wherein: The control box includes a PLC controller, a 220V to 28V power supply module, a first 380V to 600V power supply module, and a second 380V to 600V power supply module. The PLC controller communicates with the inclination sensor and the servo motor on each leg through CAN.

5. The leveling control system according to claim 4, characterized in that: The 220V to 28V power supply module supplies power to the PLC and the tilt sensor.

6. The leveling control system according to claim 2, wherein: The control box is also equipped with a display screen which can display the operating status of the servo motor and the inclination sensor, fault alarm and other working information.

7. The leveling control system according to claim 2, wherein: The control box is also provided with automatic operation and single-step operation buttons, an emergency stop button and a system indicator light. The operator sends operating instructions to the controller through the panel buttons or the handheld remote control.

8. The leveling control system according to claim 4, characterized in that: The PLC is provided with a leveling control program, which causes current changes according to changes in the motor load conditions when the legs are extended to touch the ground and retracted into place. The change feeds back the current signal to the control box through the built-in driver of the servo motor, and the control box outputs different currents to achieve leveling and support of the entire vehicle.

9. The leveling control system according to claim 8, characterized in that: The control box communicates with the built-in driver via RS422 communication.

10. The leveling control system according to claim 2, wherein: The handheld remote controller is provided with an ascending, descending and emergency stop button. When the handheld remote controller issues an ascending or descending command, the control box automatically adjusts to the specified height and levels it through a one-button leveling program. When an emergency stop command is issued, the servo motor stops running immediately.

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