Telescopic support leg for travel machine and concrete pump truck with the same

Abstract

The invention relates to a flexible supporting leg used in walking mechanics and relative concrete pump, which comprises a supporting box connecting the base and rotating the rotational axle; a sheath tube extending inside the supporting box; and a supporting leg sheathing on the front end of sheath tube and vertically extending. Wherein, said supporting box and sheath tube have a hydraulic cylinder with bidirectional function; two ends of said hydraulic cylinder are individually mounted on the fixing point at the end of supporting box and the farthest fixing point of sheath tube; and the rotational axle is between two ends of supporting box and de-center from the extension axle of hydraulic cylinder. The concrete pump can use said flexible supporting leg. The invention has tight structure, better forcing property, and shorter distance from the supporting leg rotational axle to the rotational device. And the concrete pump can better stability and wider application.

Description

technical field [0001] The invention mainly relates to the field of walking machinery, in particular to a telescopic outrigger for the walking machinery and a concrete pump truck with the outrigger. Background technique [0002] In the prior art, most of the chassis of construction walking machines are provided with outriggers that extend sideways forward and sideways. These outriggers can swing or expand relative to the axis of the chassis, and there are vertical oil cylinders at the ends of the outriggers for supporting , so that the construction mobile machinery can obtain a stable working state during operation. Taking the concrete pump truck as an example, the structure form of the front outrigger widely used at present is the multi-stage rear swing type, and the structure form of the rear outrigger is the straight swing type. In some pump trucks with short booms, the outriggers use X-shaped structure or H-shaped structure. [0003] The front outriggers of the German ...

AI Technical Summary

Problems solved by technology

The existing technology mainly has the following disadvantages: 1. Due to structural limitations, the segmented cantilever shaft structure must be adopted, which requires a larger shaft diameter to meet the force requirements; 2. Due to the cantilever shaft structure, the deformation of the support arm is large, and the force Poor; 3. Since the shaft position is far away from the rotary mechanism, the support rigidity and stability are poor

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