Compound movable arm type roof crane

Abstract

The invention belongs to the field of construction machines, and particularly relates to a compound movable arm type roof crane comprising a balance arm, a crane boom, an upper rotary table, a lower rotary table, a rotation mechanism, a hoisting mechanism, a jib lubbing mechanism, a tower body, derrick masts and a horizontal supporting rod. The tower body is perpendicularly installed on the upper rotary table. The balance arm is connected to the rear side of the upper rotary table. The crane boom is connected to the front side of the upper rotary table. The balance arm is formed by sequentially connecting a hoisting mechanism installation platform for the hoisting mechanism, a jib lubbing mechanism installation platform for the jib lubbing mechanism and a balance weight containing platform through pin shafts. The root part of the balance arm is hinged to a lug plate of the upper rotary table through a pin shaft by means of a lug plate of the jib lubbing mechanism installation platform, a safety pin is arranged, and the balance arm is prevented from generating upwarp displacement in the tower body detachment process. The two arranged derrick masts are connected with a first tower top sleeve and a second tower top sleeve correspondingly, wherein the first tower top sleeve and the second tower top sleeve are rotationally installed on the top of the tower body, and the relative included angle between the two derrick masts can be changed within a certain range. The compound movable arm type roof crane can adapt to various types of roof spaces and bearing capacity.

Description

technical field [0001] The invention belongs to the field of construction machinery, in particular to a compound boom type roof crane. Background technique [0002] In the construction of high-rise buildings, internal climbing or external hanging tower cranes are often used. At the end of the main project, roof cranes are required to dismantle the tower cranes, or roof cranes are required for hoisting operations in the later construction of the roof surface. Existing roof cranes mainly have two forms, one is a jib crane without a tower body or a short tower body, and the other is a pure pole crane. These two forms are not universal. A composite boom-type roof crane involved in the present invention has the characteristics of the above two roof cranes, can adapt to various roof hoisting or dismantling operations, and can meet the needs of construction elevators in terms of the outer line size and weight of the structural grouping. transportation requirements. Contents of t...

AI Technical Summary

Problems solved by technology

There are mainly two types of existing roof cranes, one is the jib crane without tower body or short tower body, and the other is pure pole crane, neither of which is universal

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