Motor driven semitrailer supporting device

Abstract

The invention relates to a motor driven semitrailer supporting device which comprises outer supporting legs, middle supporting legs and inner supporting legs. The outer supporting legs, the middle supporting legs and the inner supporting legs are sequentially connected in a sliding mode, the outer supporting legs are provided with lead screws, the lower ends of the lead screws are sleeved with nuts, the nuts are fixedly connected with the upper ends of the inner supporting legs, limiting pins are arranged on the middle supporting legs, limiting grooves are correspondingly formed in the side walls of the outer supporting legs, limiting pins are clamped in the limiting grooves and can vertically move, the upper ends of the lead screws are connected with a gear transmission mechanism, an input shaft of the gear transmission mechanism is connected with a speed-reducing gear mechanism, and an input shaft of the speed-reducing gear mechanism is connected with a driving motor. The motor driven semitrailer supporting device is simple in structure and large in extensible space, the labor intensity of an operator is reduced by adopting a motor to drive lifting of the supporting device, and the working efficiency is improved.

Description

technical field [0001] The invention relates to a motor-driven semi-trailer supporting device. Background technique [0002] A semi-trailer is a very widely used means of transportation in the modern transportation industry. When the semi-trailer is driving, its front end can be connected with the tractor to be supported and dragged by it. When not driving, the front end of the semi-trailer can be connected to the tractor Detachment, in order to support the front end of the semi-trailer after detachment, the bottom near the front end of the semi-trailer is often provided with a semi-trailer support device. To disengage the tractor and the semi-trailer, the traction surface of the semi-trailer needs to be raised and separated from the tractor before the tractor can be driven away. The supporting legs of the traditional semi-trailer supporting device are composed of two inner and outer supporting legs, the expansion space is small, and the effective length of the screw rod is...

AI Technical Summary

Problems solved by technology

The supporting legs of the traditional semi-trailer supporting device are composed of two inner and outer supporting legs, the expansion space is small, and the effective length of the screw rod is not fully utilized; usually, the operator needs to shake the handle by hand to raise the supporting legs during the supporting process. After the tractor is connected to the semi-trailer, the operator also needs to use the hand crank to put down the supporting legs. The whole process takes a long time and the work efficiency is low.

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