Arm frame device and engineering machine

Abstract

The invention provides an arm frame device which comprises at least four joints of arm frames, wherein all the arm frames are sequentially articulated, the first three joints of the arm frames are folded into the shape of R, the third joint of the arm frame (3) is a bending arm frame, when the arm frame device is in a folded state, the fourth joint of the arm frame (4) is folded below the third joint of the arm frame (3). The arm frame device according to the invention is compact in structure, the utilization rate of the space in the vertical direction of the arm frames is improved, the space is provided for arranging the multiple joints of the arm frames, and more joints of the arm frames can be folded in the same folding space, thereby increasing the total length of the arm frame device and improving the flexibility in material distribution of the arm frames. In addition, the invention further discloses an engineering machine with the arm frame 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

[0008] In addition, in this folding method, the folding space of the sixth section 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 section boom 6' is relatively small, generally less than 110 degrees. , resulting in poor fabric flexibility

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