Double-cross-beam type crown block lifting appliance

Abstract

The invention discloses a double-cross-beam type crown block lifting appliance. The double-cross-beam type crown block lifting appliance comprises cross beams and a lifting appliance body, wherein the cross beams comprise an upper cross beam and a lower cross beam capable of horizontally rotating around the center of the upper cross beam, the lifting appliance body comprises clamping arms which are located on the left side and the right side of the lower cross beam and can move towards the center of the lower cross beam at the same time or move towards the left end and the right end of the lower cross beam at the same time in the axis direction of the lower cross beam, and a clamping arm driving device for driving the two clamping arms to move is arranged on the lower cross beam. According to the double-cross-beam type crown block lifting appliance, the horizontal stability of the lifting appliance body is ensured through the design that the double cross beams match with double lifting points, the design of the double cross beams and a rotating shaft meets the requirement for different falling directions of a cab, the requirement for stable positioning after the lower cross beam rotates is met through a collision bead structure and a collision bead support structure, the lifting appliance body is automatically positioned through space, opening and closing actions of a lifting hook is electrically controlled, rotary positioning is mechanically assisted and two-gear closing stroke automatic control design is adopted, and lifting requirement of lifting of different vehicles models is met.

Description

technical field [0001] The invention relates to the technical field of transmission equipment, in particular to a double beam type crane spreader. Background technique [0002] In the existing technology, the cab hoisting is completed by single-girder crane + spreader, in which the single-girder crane’s cart and hoist complete the horizontal positioning, the single-hook hoist completes the vertical positioning, and the manually dragged hook is separated from the cab projection In the area, the hook is aligned with the door opening to hang the door frame to complete the lifting of the cab, and the process of lowering and lowering is the reverse operation. The objective disadvantages of the existing technology are: 1. The crane carries the spreader to complete the rough positioning of the cab, and the efficiency is low; 2. The single-point connection balance between the spreader and the hoist is poor, and it collides with the top of the cab; 3. The hook opens and closes Manua...

AI Technical Summary

Problems solved by technology

The objective disadvantages of the existing technology are: 1. The crane carries the spreader to complete the rough positioning of the cab, and the efficiency is low; 2. The single-point connection balance between the spreader and the hoist is poor, and it collides with the top of the cab; 3. The hook opens and closes Manual towing, colliding with the side roof; 4. Two people are required to cooperate in picking and hooking each lifting process, which takes about 30% of the total time, and the labor load is not enough

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