Auxiliary arm system and crawler crane

Abstract

The invention relates to an auxiliary arm system and a crawler crane. The auxiliary arm system comprises an auxiliary arm rear pull plate, an auxiliary arm support, an auxiliary arm, an auxiliary arm front pull plate and a main cargo boom. The auxiliary arm support is composed of a top section arm and a bottom section arm. The bottom end of the auxiliary arm, the bottom section arm of the auxiliary arm support and the top end of the main cargo boom are connected together. The two ends of the auxiliary arm rear pull plate are respectively connected to the bottom end of the main cargo boom and the top section arm of the auxiliary arm support. The two ends of the auxiliary arm front pull plate are respectively connected to the top section arm of the auxiliary arm support and the top end of the auxiliary arm. According to the auxiliary arm system, as torque on a hinge point of the auxiliary arm support from the auxiliary arm rear pull plate is small, the backward overturning torque of a boom system is reduced, the backward overturning possibility of the boom system is reduced, and the whole crane can be stable. Components of the auxiliary arm system are some components of a tower-type auxiliary arm system, and therefore the cost does not need to be increased, and the utilization rate of the crane structure is increased.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to an auxiliary arm system and a crawler crane including the auxiliary arm system. Background technique [0002] In order to meet the hoisting demand for super-large equipment in domestic petroleum, petrochemical, nuclear power, wind power, steel and other large-scale engineering projects, cranes are becoming more and more super-large, with higher lifting height, larger working range and stronger lifting capacity. Among various types of cranes, crawler cranes have become an indispensable tool in the installation of large equipment due to the precision of their hoisting movements. [0003] A crawler crane refers to a boom system crane that uses a crawler chassis. The boom system refers to the structural components used in the crane for hoisting. As an important part of the crawler crane, the boom system plays an important role in the lifting operation of the crawler crane. In t...

AI Technical Summary

Problems solved by technology

[0013] The standard tower jib system and the super-lift tower jib system have a larger lifting capacity than the fixed jib system, a higher lifting height, and a larger variable compensation angle. The disadvantages are: the rear bracket of the tower jib The length is longer and the assembly is more difficult. The rear pull plate of the tower jib causes a larger rear tilting moment, which increases the possibility of the jib system turning back; the weight of the rear bracket of the tower jib is heavy, and it is difficult to hoist. Difficult to raise the arm and limited arm length, resulting in limited lifting height; installation is very difficult, more time-consuming and inconvenient

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