Locking mechanism of lifting appliance for metro segments

Abstract

The invention belongs to the technical field of tools for metro segments, and particularly relates to a locking mechanism of a lifting appliance for metro segments. The locking mechanism of the lifting appliance for the metro segments comprises a moving arm and a locking device. The locking device comprises a locking arm and an adjusting nut. A stop block is arranged on the locking arm, and the locking arm is connected with the adjusting nut through an adjusting screw rod. The moving arm comprises a connecting plate, a locking plate and a hooking head. The connecting plate and the locking plate are of an integrated bent structure, the locking plate and the hooking head are of an integrated bent structure, and the locking plate is provided with a locking opening. When the locking arm moves with a pin shaft as the center, the stop block on the locking arm can abut against the locking opening in the locking plate. The locking mechanism has the beneficial effects that the locking mechanism can change along with changing of the thicknesses of products, also can be used for ultra-thick segments, and cannot break the products by clamping when the thicknesses of the segments are not enough or gaps are too large due to abrasion.

Description

technical field [0001] The invention belongs to the technical field of subway segment appliances, in particular to a locking mechanism of a subway segment hanger. Background technique [0002] The position of the locking hole for the general hoisting of the subway segment hoist adopts a fixed locking arm. The size of the fixed locking arm is fixed during production. Due to manufacturing errors, the surface of the segment is not cleaned during production. In place, excessive cleaning will cause the thickness of the segment to change by 3-5mm. If the gap of the fixed locking arm is too small and the segment is too thick, the fixture will not work normally. If the gap of the fixed locking arm is too large Large (or because the gap becomes larger due to wear) will also increase the gap between the movable arm and the fixed arm, and the product will be pinched and broken, and even cause the accident of the segment falling. The breakage rate of the product in actual production has...

AI Technical Summary

Problems solved by technology

[0002] The position of the locking hole for the general hoisting of the subway segment hoist adopts a fixed locking arm. The size of the fixed locking arm is fixed during production. Due to manufacturing errors, the surface of the segment is not cleaned during production. In place, excessive cleaning will cause the thickness of the segment to change by 3-5mm. If the gap of the fixed locking arm is too small and the segment is too thick, the fixture will not work normally. If the gap of the fixed locking arm is too large Large (or because the gap becomes larger due to wear) will also increase the gap between the movable arm and the fixed arm, and the product will be pinched and broken, and even cause the accident of the segment falling. The breakage rate of the product in actual production has reached 20%, this situation not only increases the labor intensity of the workers, but also increases the repair cost, and also has a great impact on the appearance quality of the segments

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