Crane fly jib hitching and recycling limiting device

Abstract

The invention discloses a crane fly jib hitching and recycling limiting device. The crane fly jib hitching and recycling and limiting device is characterized by comprising a first auxiliary device forlimiting the position II and a second auxiliary device for limiting the position III; the first auxiliary device comprises as spring pin and a limiting plate, the spring pin is welded to the jib headof a main jib, and the limiting plate is welded to a fly jib; at the position II, the spring pin is clamped in a limiting hole in the limiting plate to limit the fly jib, the second auxiliary devicecomprises as spring handle, and the spring handle is welded to the fly jib; and at the position III, the spring handle is bounced into a shaft hole clearance of the main jib and the fly jib to limit the main jib and the fly jib. According to the device, automatic limiting of fly rib hitching and recycling is achieved through two limiting devices.

Description

technical field [0001] The invention belongs to the technical field of crane mechanical equipment, and in particular relates to a recovery limit device for a jib of a crane. Background technique [0002] Explanation of related terms: [0003] Lifting arm: It is generally formed by butt jointing of two steel plates bent into a groove shape. It is composed of multiple sections and adopts an embedded assembly form. It can use the expansion and contraction of the internal oil cylinder to realize the expansion and contraction between the arms through the cable. [0004] Jib: The auxiliary jib of the crane (hereinafter referred to as the jib) is designed to increase the lifting height and range of the crane on the basis of the jib. The structural parts used in special working conditions are generally suspended on the crane. The side of the boom, when in use, rotate horizontally around the boom head to complete the docking. [0005] As the tonnage of the crane increases, the siz...

AI Technical Summary

Problems solved by technology

The scheme of traction control by soft rope is mainly that the auxiliary arm is mainly controlled by soft rope traction, and it is difficult to control the auxiliary arm at the designated position due to the influence of inertia. Usually, multiple attempts to adjust are used, which is time-consuming and laborious and the success rate is not high.

And human traction, increasing the number of operators does not match the goal of single-person operation of the whole machine

[0013] Both of the above existing two solutions have deficiencies. For example, the soft rope traction requires the cooperation of two people, which increases labor costs, and the precision control is difficult. Multiple operations are required, which is time-consuming and laborious, and the success rate is low; tie the traction rope to the fuselage or The positioning accuracy of other positions is poor, and position III needs to be found and fixed on site, which is difficult to achieve

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