Segmented balance arm and tower crane

Abstract

A segmented balance arm comprises a first arm segment comprising a first main rod, a second arm segment comprising a second main rod, and a connection structure connecting the first arm segment and the second arm segment; the connection structure comprises a connection joint and a protection apparatus; the connection joint is disposed at the upper part of the connection structure and comprises a first ear plate and a second ear plate; the protection apparatus is disposed at the lower part of the connection structure and comprises an insertion plate and two wing plates; the first ear plate and the insertion plate are disposed at the first main rod of the first arm segment, and the insertion plate does not protrude downward from the bottom surface of the first main rod; the second ear plate and the two wing plates are arranged at the second main rod of the second arm segment, and the two wing plates do not protrude downward from the bottom surface of the second main rod; the first ear plate and the second ear plate are in fixed connection via a first fixing component; the mutual interval of the two wing plates forms an insertion groove, and the insertion plate is inserted into the insertion groove; and the insertion plate are fixedly connected with the two wing plates via second fixing components.

Description

technical field [0001] The invention relates to the technical field of tower cranes, in particular to a segmented balance arm and a tower crane using the same. Background technique [0002] In recent years, with the in-depth development of the construction industry, tower cranes (also referred to as "tower cranes") have been widely used. The popularization and use of tower cranes has gradually changed the vertical and horizontal transportation methods of construction, created safe working conditions for operators, and improved work efficiency at the same time. The balance arm is a more important part of the tower crane, and the structure of the balance arm has a single-section type and a sub-section type. Generally speaking, the segmented balance arm is convenient to use with the variable arm length of the boom, and its transportation is also very convenient, so it is widely used. [0003] figure 1 Shown is an existing segmented balance arm (the balance arm pull rod and o...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the embodiment of the present invention provides a segmented balance arm to solve the unreasonable stress on the joint of the connection structure of the segmented balance arm in the prior art, and the downward protrusion of the connecting lug beyond the The underside of the main string makes the balance arm difficult to place and easily damaged

Images