Eccentric and rotatable lifting method and hoisting crane

Abstract

The invention provides an eccentric and rotatable lifting method and an eccentric and rotatable hoisting crane, wherein a hoist installing bracket is suspended under a small rail car by a hanger rod, and the hoist installing bracket can swing in a rotating way under the small rail car around the central axis of the hanger rod; and a hoist lifting hook is arranged right under one end of the hoist installing bracket and is eccentrically distributed relative to the central axis, and a hoist is eccentrically and rotatablely lifted by swinging the hoist installing bracket. A positioning inserting pin is arranged on the hoist installing bracket, and the hoist installing bracket is positioned and fixed by the positioning inserting pin; the other end of the hoist installing bracket is provided with a tightly-supporting device, and the tightly-supporting device and the hoist are respectively arranged at two sides of the hoist installing bracket which takes the central axis of the hanger rod asthe center; and the tightly-supporting device is connected with a running track of the small rail car by a pulley wheel in a rolling way. The hoist installing bracket is arranged under the small railcar by a hinge pin, so that the hoist installing bracket can rotate around the central axis of the crane, and the rotated hoist installing bracket can be positioned and fixed by the positioning inserting pin.

Description

technical field [0001] The invention relates to a lifting method and equipment, in particular to an eccentrically rotatable lifting method and crane equipment. Background technique [0002] Because of its light structure and convenient hoisting, hoist cranes are very popular in industrial production; in the existing technology of hoist cranes, in order to ensure that the center of gravity is centered, they are all symmetrical structures and the vertical axis of the lifting sprocket is at the center of gravity of the hoist crane. On the same vertical line, in production practice, we found that the hoisting work of existing hoist cranes is inconvenient in a narrow working area. For example, in the wind turbine nacelle, some heavy parts often need to be maintained, repaired, or even replaced , such as yaw motors, radiators, etc., the installation positions of these components are distributed on the outside of the wind turbine chassis, while the components in the wind turbine ca...

AI Technical Summary

Problems solved by technology

[0002] Because of its light structure and convenient hoisting, hoist cranes are very popular in industrial production; in the existing hoist crane technology, in order to ensure that the center of gravity is centered, they are all symmetrical structures and the vertical axis of the lifting sprocket is at the center of gravity of the hoist crane. On the same vertical line, in production practice, we found that the hoisting work of existing hoist cranes is inconvenient in a narrow working area. For example, in the wind turbine nacelle, some heavy parts often need to be maintained, repaired, or even replaced. , such as yaw motors, radiators, etc., the installation positions of these components are distributed on the outside of the wind turbine chassis, while the components in the wind turbine cabin are arranged compactly and the working area is narrow. When using the existing electric hoist for hoisting work, these The position is often outside the working area of ​​the existing electric hoist. In the wind turbine cabin, the existing electric hoist cannot meet the lifting and hoisting requirements, and further improvement is urgently needed

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