A boom type construction machine and its boom device

Abstract

The invention discloses a boom device of a boom-type engineering machine, which comprises a first boom, a second boom, a third boom and a fourth boom which are movably connected respectively, and the third boom is a curved boom frame, power components are installed between each adjacent boom frame to drive any boom frame to rotate relative to its adjacent boom frame, and the folding direction of the second boom frame relative to the first boom frame is the same as that of the first boom frame The folding direction of the third arm frame relative to the second arm frame is opposite, and the folding direction of the fourth arm frame relative to the third arm frame is the same as that of the third arm frame relative to the first arm frame. The folding directions of the two booms are the same. In this way, the folding space of the fourth boom is large, so that the boom device is not easy to be super-high when the boom device is in the folded state, the number of booms of the boom device can be further increased, and the transition performance of the concrete pump truck is improved. The invention also discloses a boom-type construction machine comprising the above-mentioned boom device.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to an arm support device. The present invention also relates to a boom-type construction machine comprising the above-mentioned boom device. Background technique [0002] With the rapid development of my country's economic construction, the market demand for boom-type construction machinery, especially concrete pump trucks, is increasing. [0003] During the working process of the concrete pump truck, the concrete needs to be transported to the designated position through the delivery pipe fixed on the arm frame, and as the delivery position changes, the arm frame needs to drive the delivery tube to realize the actions of unfolding, retracting and rotating, so , The boom in the concrete pump truck is generally multi-section, and each section of the boom can be folded. [0004] Please refer to figure 1 , figure 1 It is a schematic structural diagram of a typical boom device i...

AI Technical Summary

Problems solved by technology

[0006] Like this, when above-mentioned boom device is folded, because the 3rd boom, the 4th boom, the 5th boom and the 6th boom are all in the boom space between the first boom and the second boom, accommodate The boom space of other booms is small, and it is easy to cause the superhigh situation of the boom. Therefore, the folding structure of the above boom can easily cause the overall superheight of the concrete pump truck; at the same time, due to the first boom and the second The height of the boom space between the two booms is limited, so that the boom device cannot continue to increase the number of booms, which limits the further increase of the number of booms

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