Anti-back-tipping structure of movable-arm tower crane

Abstract

The invention discloses an anti-back-tipping structure of a movable-arm tower crane. The anti-back-tipping structure comprises a spherical buffer (1), an inner guide rod (2), an outer guide rod (4), a spring (3), an operation rod (6), a stroke limiter (10) and a stroke limiter base (9), wherein the spherical buffer is installed on the end part of one end of the inner guide rod; the other end of the inner guide rod is inserted in the outer guide rod and capable of moving back and forth in the outer guide rod; the spring sleeves the cylindrical surface of the inner guide rod and capable of compressing or returning along with the movement of the inner guide rod; the operation rod is installed at the outer sides of the inner guide rod and the outer guide rod and capable of moving back and forth along with the inner guide rod; the stroke limiter is installed on the stroke limiter base, and the trigger part of the stroke limiter is arranged by being corresponding to the operation rod. The anti-back-tipping structure disclosed by the invention is capable of preventing a boom from tipping back in a luffing process, thus solving the problem of a rigid impact between the boom and a tower top; meanwhile, the back-tipping angle of the boom is easier to control, thus being safer.

Description

technical field [0001] The invention relates to an auxiliary structure for a boom tower crane, in particular to an anti-tilt structure for a boom tower crane, and belongs to the technical field of boom tower cranes. Background technique [0002] The jib of a luffing jib tower crane can be luffed from a horizontal position to a nearly vertical position, the amplitude is greatest when the jib is in the horizontal position, and the least when the jib is luffed close to the vertical position . During work, due to the effects of inertial load and wind load, the jib may have a relatively rigid impact with the tower top, or may tip over backwards during the luffing process. At present, in order to prevent the boom from tipping backward during the luffing process, and to solve the problem of rigid impact between the boom and the top of the tower, an anti-tilt structure is generally installed in the jib tower crane. [0003] The existing anti-backward structure of the boom tower cr...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the above-mentioned prior art, the present invention provides an anti-tilt structure for a boom tower crane, which can not only prevent the boom from tipping backward during the luffing process, but also solve the problem of the gap between the boom and the top of the tower. Rigid impact problem, and its back tilt angle control is accurate, high reliability

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