Counterweight synchronous moving mechanism of movable arm type crane

Abstract

The invention discloses a counterweight synchronous moving mechanism of a movable arm type crane and relates to the field of cranes. The counterweight synchronous moving mechanism is small in structure, good in stability and high in safety. The mechanism comprises a cargo boom, a balance arm, a counterweight and a counterweight moving mechanism, wherein the counterweight moving mechanism can drivethe counterweight to move in the length direction of the balance arm. The counterweight moving mechanism comprises a first driving rod, a second driving rod, a third driving rod, a fourth driving rodand a support, wherein the support is connected with the balance arm. The support, the third driving rod, the fourth driving rod and the counterweight are connected to form a crank sliding block mechanism. The first driving rod is hinged to the fixed hinge point, the first driving rod is connected with the cargo boom and can rotate together with the cargo boom, the second driving rod is hinged tothe first driving rod and the third driving rod, and the second driving rod can transmit the rotation of the first driving rod to the third driving rod. According to the counterweight synchronous moving mechanism, all the driving rods are used for converting the rotating motion of the cargo boom into the movement of the counterweight.

Description

technical field [0001] The invention relates to the field of cranes, in particular to a counterweight synchronous movement mechanism of a boom crane. Background technique [0002] Luffing jib tower crane has the structural characteristics of large jib elevation angle change, small tail turning radius and good overall stability; it also has performance characteristics such as large lifting capacity, large lifting height and fast lifting speed. It is the best choice for modern tower construction operations, construction operations in narrow spaces, construction operations in densely populated areas of urban buildings, and super high-rise building construction operations. [0003] However, just because the jib elevation angle changes greatly, its own weight bending moment relative to the tower body also changes greatly; thus, the ratio of the lifting characteristic curve of the tower crane is larger than that of the trolley luffing tower crane. Moreover, most of the boom-type ...

AI Technical Summary

Problems solved by technology

The latter uses wire ropes to pull the counterweight to move. Although the structure is relatively small, the overall stability and reliability are insufficient.

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