Container spreader closed shutter

Abstract

The invention discloses a container spreader closed shutter. The container spreader closed shutter comprises a vertically-placed box body and a box cover; a closed box is internally provided with a pull rod and a gear transmission mechanism; the upper end of the pull rod is arranged outside the closed box after penetrating through a square hole formed in the top end of the closed box, the upper end of the pull rod is provided with a lifting hole, the lower end of the pull rod is a pull rod boss and arranged in the closed box; the gear transmission mechanism comprises a gear, a left slide blockand a right slide block, the left slide block and the right slide block are symmetrically distributed on the left side and the right side of the gear correspondingly and are identical in structure, the gear is fixed to a gear shaft, and left slide block and the right slide block each comprise a rack engaged with the gear. According to the container spreader closed shutter, lifting force of a crane to the pull rod is transmitted to the gear shaft to conduct reversing rotation through the gear transmission mechanism so that it can be achieved that a container spreader is automatically hung on and separated from a container, the reversing stroke is short, low clearance lifting operation limited in height can be met, meanwhile, the container spreader closed shutter is of a closed structure, the influence of dust in a working environment to lubrication of the transmission mechanism in the closed box is reduced, and the service life of the transmission mechanism is prolonged.

Description

technical field [0001] The invention relates to a container spreader, in particular to a spreader for a non-powered container. Background technique [0002] The unpowered container spreader refers to the spreader that has no other power source except the lifting power of the crane to make the spreader carry out the container lifting operation. Unpowered container spreaders can be divided into two categories: unpowered container manual spreaders and unpowered container automatic spreaders. The connection between the unpowered container automatic spreader and the container does not need to be manually carried out, and the automatic removal and hanging of the container can be realized. Such as Image 6 As shown, the non-powered container automatic spreader generally includes a switch 93 , a hanger 94 and four hoisting ropes 91 . The lower end of the switch 93 device is fixed on the hanger 94 and is positioned at the middle position of the hanger 94. The output shafts at the t...

AI Technical Summary

Problems solved by technology

Moreover, the currently used switch requires a relatively large stroke of the crane hook when realizing the reversing action of the output shaft. Generally, the minimum clearance stroke required is 500-1000mm, which cannot meet the low clearance lifting operation with limited lifting height.

Images