Telescopic door frame of platform vehicle

Abstract

The invention discloses a stretchable portal frame for a platform truck, and the stretchable portal frame is mounted on a chassis of the platform truck. The stretchable portal frame comprises two stretching parts which are respectively arranged on the left and right sides of the chassis. Each of the stretching parts comprises a first support base, a second support base, a first rotating arm, a second rotating arm, a first mounting base, a second mounting base, a hoisting arm and a thruster, wherein one ends of the first support base and the second support base are respectively connected to the front and back sides of the chassis; one ends of the first rotating arm and the second rotating arm are respectively hinged with the other ends of the first support base and the second support base; one ends of the first mounting base and the second mounting base are hinged with the other ends of the first rotating arm and the second rotating arm; the hoisting arm is connected between the first mounting base and the second mounting base; and the thruster is used for pushing the first rotating arm and the second rotating arm. The stretchable portal frame for the platform truck provided by the invention can be used for realizing the synchronous stretching in the horizontal and vertical positions.

Description

Technical field [0001] The invention relates to a platform vehicle, in particular to a telescopic mast of the platform vehicle. Background technique [0002] Transport platform vehicles have been used in loading and unloading and transporting goods. For example, Chinese Patent CN2384864 discloses an aviation loading and unloading transport platform vehicle. The loading and unloading platform vehicle 1 includes a self-driving chassis 11 and a transmission platform supported by a lifting device. 12. A pair of main beams 14, a cab 18 and four leg devices 130 for keeping the car body stable. The lifting device of the loading and unloading transport platform vehicle 1 adopts a combined form of a half-fork frame device 15 and a bending frame device 17. Wherein, the half-fork device 15 is located at the head end of the transport platform vehicle, and it includes a first arm 151 connected between the transport platform 12 and the chassis 11; and the upper end is connected with the first...

AI Technical Summary

Problems solved by technology

However, the telescopic mast can only expand and contract in the horizontal position, and the longitudinal position remains unchanged. In this way, when the goods need to be hoisted, the boom device needs to stretch out the telescopic mast for a certain distance to reach the goods. It is time-consuming and labor-intensive, and the convenience is poor. In addition, because the boom device needs to extend a long distance to lift the goods, the center of gravity is too large, which will also affect the stability of the platform truck to a certain extent.

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