Cantilever support device and engineering machinery

Abstract

The invention relates to a cantilever support device and engineering machinery. The cantilever support device comprises a plurality of sections of cantilever supports which are sequentially hinged endto end; and in the cantilever support device in a folded state, the first section of cantilever support to the N section of cantilever support are sequentially folded into an R shape in a first direction, and the (N+1) section of cantilever support is reversely folded relative to the N section of cantilever support in a second direction, the (N+2) section of cantilever support orthe (N+2) section of cantilever support to the last section of cantilever support are sequentially folded into an R shape in the first direction, so that the folding form of the cantilever supportdevice is an RZR shape, hinge points of the multiple sections of cantilever supports are all located behind a cab, wherein N is larger than 3 and smaller than n, and n is the total section number ofthe cantilever support device. The folding mode of the whole cantilever support device is RZR shape, the number of sections of the cantilever support constructed into the R shape is large, the effective length of the whole cantilever support device is increased, the whole cantilever support device is more compact in the folded state, the length of the folded outer contour is shorter, the reversely-folded cantilever support can achieve large-angle rotation, the flexibility of cloth is improved, and interference with the cab is avoided.

Description

technical field [0001] The present disclosure relates to the technical field of construction machinery, and in particular, relates to a boom device and construction machinery. Background technique [0002] The boom device includes a multi-section boom. Driven by the driving device, the multi-section boom can realize actions such as unfolding, retracting, rotating, and folding. The concrete is delivered to the designated location. When it is not working, the boom device can be folded to minimize the space occupied by the concrete pump truck. However, in the existing 6RZR boom device, in order to meet the length requirement of the boom, one of the booms is usually very long, which makes the manufacturing process more difficult and prone to deformation, and the hinge point of the boom will extend to the cab above, resulting in strict restrictions on the deployment sequence of the boom device; the folding method of the 7R boom device has many deployment procedures, complicated ...

AI Technical Summary

Problems solved by technology

[0003] The first object of the present disclosure is to provide a boom device, which can solve the problems of the existing boom devices, such as complex deployment procedure, long deployment time, inflexible fabric, and interference with the cab.

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