A heavy lifting device

Abstract

The invention discloses a heavy load hoisting device. The heavy load hoisting device comprises a base frame, a first pull plate, a second pull plate, a first curved boom, a middle beam, a first connecting rod, a first ejector plate support, a second curved boom, a middle beam, a second connecting rod and a second ejector plate support. The first curved boom, the middle beam, the first connecting rod and the first ejector plate support are sequentially connected to form one parallel four-link mechanism, and the second curved boom, the middle beam, the second connecting rod and the second ejector plate support are sequentially connected to form another parallel four-link mechanism. The lower end of the base frame is connected with a spindle, one end of the first pull plate and one end of the second pull plate are movably connected with the spindle, a hydraulic cylinder is fixed to a first pull plate shaft, and the hydraulic cylinder is connected with a second pull plate shaft through a piston. A first ejector plate is arranged on the first ejector plate support, a second ejector plate is arranged on the second ejector plate support, and the first ejector plate and the second ejector plate are oppositely arranged. According to the heavy load hoisting device, hydraulic opening and closing are used in cooperation with rotation of a crown block hook, the hoisting position of a workpiece is accurately found, and the process requirements such as stable hoisting, overturning and material erecting are met.

Description

technical field [0001] The invention relates to the field of mechanical lifting equipment, in particular to a heavy-duty lifting device. Background technique [0002] At present, domestic ultra-heavy castings and forgings need three pieces of equipment to complete the transportation, vertical material, vertical lifting and turning over of forgings, namely, heavy-duty clamps, giant turning machines, and heavy-duty vertical lifting spreaders. The investment is more than three times that of a single multifunctional spreader, and the process is complicated. When traditional tooling equipment is working, due to structural reasons, it actually belongs to single-point lifting, and the force on the left and right of the lifting middle beam is uneven. Therefore, during use, the middle beam is often tilted, which increases the hoisting force. In the next use, it needs to be lifted. Adjustments that affect synchronicity. Contents of the invention [0003] The purpose of the present...

AI Technical Summary

Problems solved by technology

The investment is more than three times that of a single multi-functional spreader, and the process is complicated

When traditional tooling equipment is working, due to structural reasons, it actually belongs to single-point lifting, and the force on the left and right of the lifting middle beam is uneven. Therefore, during use, the middle beam is often tilted, which increases the hoisting force. In the next use, it needs to be lifted. adjustments that affect the synchronicity

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