Optimal stress angle adjusting device for automobile crane jib

Abstract

The invention discloses an optimal stress angle adjusting device for an automobile crane jib, and belongs to the technical field of lifting devices. The adjusting device is characterized in that the non-lifting end of the jib is hinged and fixed on a rotating chassis, a counterweight is fixedly installed at the tail end, the rotating chassis is fixed on the side of a main chassis, a rotating tableis installed at the bottom of the middle of the main chassis, a cab is installed at the top of the main chassis, and an optimizing adjusting device comprises a sliding plate with upper end surface hinged with the bottom end of a supporting oil cylinder, and is fixed on a sliding chassis on the main chassis; a sliding groove matched with the sliding plate is formed in the sliding chassis, the sliding plate is embedded in the sliding groove of the sliding chassis and slides, and the sliding groove and the jib are always kept in the same vertical plane. By adjusting the optimal angle of stress between the jib and the supporting oil cylinder, the size of the lifting variable angle is closest to reasonable angle size, the lifting load at the limit position is increased, and the influence of variable amplitude stress on the jib is reduced.

Description

technical field [0001] The invention belongs to the technical field of hoisting devices, and in particular relates to a device for adjusting an optimal force-bearing angle of a boom of an automobile crane. Background technique [0002] As a kind of high-efficiency lifting machinery, truck crane is a kind of common equipment for infrastructure builders. Truck crane has the advantages of good trafficability, flexible maneuverability, high driving speed and fast transfer. The boom is used as a force-bearing The key parts are directly related to the maximum lifting weight and service life of the truck crane. Now the lifting structure of the crane generally includes the boom and the supporting cylinder, and the two ends of the lifting cylinder are fixedly connected, and only the angular rotation occurs, so that the angle between the boom and the supporting cylinder or the supporting cylinder during the lifting process The angle with the horizontal plane is constantly changing, a...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is to provide a device for adjusting the optimal force-bearing angle of the boom of a truck crane, so as to avoid unnecessary changes in the angle between the support cylinder and the horizontal plane or the optimal angle of the load-bearing force between the boom and the support cylinder. It also solves the problem that the optimal bearing angle of 70-90° between the extreme support position point support cylinder and the horizontal plane cannot be maintained all the time

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