Super-lifting device for improving lifting performance of crane and crane

Abstract

The invention discloses a super-lifting device for lifting the lifting performance of a crane and a crane. The super-lifting device comprises a support frame, a driving part, an arm head pulley and a winch, wherein the bottom end of the support frame is connected with the upper side of a crane boom, so that the support frame can swing within a vertical plane opposite to the crane boom, and a pulley part is arranged at the top end of the support frame; the driving part is connected to the support frame and is used for driving the support frame to swing on the crane boom; the arm head pulley is arranged at the arm head part of the crane boom; the winch extends along the crane boom through a steel wire rope extending out of the winch; the steel wire rope is connected with the pulley part and the arm head pulley in a winding manner in sequence to lift a heavy object; and the winch is used controlling the steel wire rope to stretch and contract, thereby realizing the lifting or the descending of the heavy object. The super-lifting device of the crane and the crane improve the stress condition of the crane boom with a simple structure, so that the lifting performance of the crane is improved.

Description

technical field [0001] The invention relates to lifting engineering machinery, in particular to a super-lifting device and a crane for improving the hoisting performance of the crane. Background technique [0002] Crane is a common lifting engineering machinery. In order to make the crane have a larger lifting height, its lifting main arm is generally designed to be longer. The component force in the tangential direction is also large, which makes the deflection of the main boom on the luffing plane and the slewing plane large, which also limits the lifting weight and carrying capacity of the crane. In order to solve the above problems, a super-lifting crane is designed. device to improve the stress state of the boom. [0003] At present, the common super-lifting devices have two structural forms: door type and Y-type. The jib is equivalent to applying a force at the end of the boom that is conducive to the operation of the boom, reducing the deflection of the boom, thereb...

AI Technical Summary

Problems solved by technology

[0005] However, as mentioned above, the existing super-lifting devices have a complex structure and require more accessories, and are mainly used in crawler cranes and all-terrain cranes with a large tonnage (above 400 tons), and the application range is relatively narrow.

Images