Needle bar mechanism of overedger

Abstract

The invention provides a needle bar mechanism of an overedger. The needle bar mechanism comprises a driven shaft; the driven shaft is driven by a driving system to rotating back and forth about an axis; a needle bar crank fixedly sleeves the driven shaft; a crank pin is mounted on one end, far away from the driven shaft, of the needle bar crank; the crank pin is inserted in the guide groove of a needle bar retainer and slides in the guide groove; the needle bar retainer is fixedly connected with a needle bar; the axis of the needle bar is perpendicular to that of the driven shaft; at least one needle bar sleeve sleeves the needle bar; the needle bar slides in the needle bar sleeve along the axis; the needle bar sleeve is fixedly connected with a housing. The needle bar mechanism of the overedger has the advantages that a novel slider needle bar mechanism is adopted so that the stroke of the needle bar is more accurate, the machining requirement on each part of the needle bar mechanism is low so that the cost of the whole needle bar mechanism is reduced under the premise of guaranteeing the accuracy of the travel bar stroke, and meanwhile, the structure of two needle bar sleeves is adopted so that the abrasion of the needle bar caused by the high-speed running of the machine is reduced and the machining precision of the needle bar is reduced.

Description

technical field [0001] The invention relates to a needle bar mechanism of an overlock sewing machine. Background technique [0002] Overlock sewing machine is one of the main sewing equipment of garment enterprises. It is used to trim and sew the edges of fabrics in garment processing, and wrap the edges of fabrics with specific stitches to prevent the yarns of the fabric from falling apart. If the speed of the overlock sewing machine is too high during use, it is easy to cause the needle bar to be stuck. Therefore, the needle bar mechanism of the overlock sewing machine requires high precision in the manufacturing process of the overlock sewing machine. [0003] The needle bar mechanism of existing overlock sewing machine has two kinds, slide bar type and sliding sleeve type. There are two types of slider type. One type of needle bar mechanism is a slider type structure. In the entire needle bar mechanism, there is only one needle bar sleeve. Due to the short distance of t...

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a needle bar mechanism o

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