Method and device for controlling electric supporting frame for trailer

Abstract

The invention discloses a method and device for controlling an electric supporting frame for a trailer. The electric supporting frame comprises a motor, a speed adjusting device, a control unit, a limiting device, a driving device, a conveying device and a supporting frame body. The control unit receives an electric supporting frame ascending or descending starting signal, the motor is controlledto rotate forwards or backwards, and the limiting device gives an initial position signal and starts initial position recording. After the motor rotates and the speed is regulated through the speed regulating device, the driving device is driven to move, then the motion of the driving device drives the conveying device to move, and therefore the electric supporting frame is controlled to ascend ordescend. When the position record in the limiting device reaches the end point, a signal indicating reaching of the highest position or lowest position is sent, and after the control unit receives the position signal, the motor is controlled to be shut down. The speed regulating device, the driving device and the transmitting device operate in a gear engagement manner. The motor drives the supporting frame body to ascend or descend, all-day work of the supporting frame body is achieved, and the safety of supporting frame operation is guaranteed.

Description

technical field [0001] The invention relates to the technical field of a trailer support frame, in particular to a control method and device for an electric support frame for a trailer. Background technique [0002] At present, trailers or semi-trailers, for example, need to use support frames when connecting or unloading trailers or semi-trailers. The current electric support mostly adopts electro-hydraulic control mode, and the support is raised or lowered through the hydraulic system. Although Hydraulic transmission has many advantages, but its disadvantages cannot be ignored. Disadvantage 1. Hydraulic transmission uses liquid as the working medium, and leakage cannot be avoided during the relative movement of hydraulic components. Coupled with the compressibility of liquid, it is difficult to achieve a strict transmission ratio; Disadvantage 2 1. Liquid viscosity is closely related to temperature. When viscosity changes with temperature, it will directly affect leakage, ...

AI Technical Summary

Problems solved by technology

[0002] At present, trailers or semi-trailers, for example, need to use support frames when connecting or unloading trailers or semi-trailers. The current electric support mostly adopts electro-hydraulic control mode, and the support is raised or lowered through the hydraulic system. Although Hydraulic transmission has many advantages, but its disadvantages cannot be ignored. Disadvantage 1. Hydraulic transmission uses liquid as the working medium, and leakage cannot be avoided during the relative movement of hydraulic components. Coupled with the compressibility of liquid, it is difficult to achieve a strict transmission ratio; Disadvantage 2 1. Liquid viscosity is closely related to temperature. When viscosity changes with temperature, it will directly affect leakage, pressure loss and flow through components. Hydraulic system should not work at very high and low temperatures; Disadvantage 3. Energy in hydraulic system After two conversions, the transmission efficiency is low, and the reliability of work is not as good as that of electric and mechanical transmission; the fourth disadvantage is that the manufacturing precision of hydraulic components is high, and the use and maintenance require certain professional knowledge and high technical level. Difficult to determine

[0003] Based on the shortcomings of the hydraulic system itself, the application environment and service life of the trailer support frame are limited

Images