Arm support device and engineering machinery

Abstract

Disclosed is a boom device, comprising at least five sections of boom, each of the booms being hinged to each other successively, the third section of boom (3) being a curved boom; when the boom device is in a folded state, the first three sections of booms are folded into an R shape, with the fourth section of boom (4) being folded in a position above the third section of boom (3), and with the third section of boom (3), the fourth section of boom (4) and the fifth section of boom (5) being folded into an R shape, and the fifth section of boom (5) being folded in the position below the third section of boom (3). The boom device is relatively compact in structure, improving the use efficiency of the space in the vertical direction of the booms, providing enough space for the arrangement of multiple sections of booms, thus more sections of booms can be folded within the same folding space, thereby increasing the overall length of the boom device, and improving the distributing flexibility of the booms. In addition, also disclosed is engineering machinery having the abovementioned boom device.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to an arm support device. The present invention also relates to a construction machine with the above-mentioned boom device. Background technique [0002] Concrete pump truck is a typical construction machinery, which can transport concrete along the pipeline to the required location of the construction project. During the working process, the concrete pump truck needs to transport the concrete to the designated position through the delivery pipe fixed on the boom device, and as the delivery position changes, the boom device needs to drive the delivery pipe to realize unfolding, folding and rotation. The boom device of the concrete pump truck generally includes a multi-section boom, and each section of the boom can be folded. [0003] At present, the folding methods used for the booms of concrete pump trucks mainly include R-type, Z-type and RZ-type overall folding m...

AI Technical Summary

Problems solved by technology

However, increasing the number of axles of the concrete pump truck will affect the performance matching of the whole vehicle, and will lead to a sharp increase in the cost of the whole vehicle, which is not conducive to cost saving

In addition, in the above-mentioned folding method, the folding space of the sixth boom 6' in the vertical direction is relatively small, and it is not convenient to install a turning mechanism, so the turning angle of the sixth boom 6' is relatively small, and generally the turning angle is less than 110 degrees. , leading to poor fabric flexibility

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