Sewing machine feeding mechanism

Abstract

The invention belongs to the technical field of sewing machines and particularly relates to a sewing machine feeding mechanism. A feed lifting crank is arranged at the front end of a lower main shaft. Sliding blocks are fixedly arranged on the lower main shaft. Feed lifting sliding blocks are arranged on the feed lifting shaft. Sliding grooves are formed in the left ends and the right ends of a differential motion tooth frame and a main cloth feeding tooth frame. The sliding blocks and the feed lifting sliding blocks are arranged in the sliding grooves in the two ends of the differential motion tooth frame and the two ends of the main cloth feeding tooth frame. Tooth frame blocking plates are arranged on the front sides of the sliding blocks. The tooth frame blocking plates are in contact connection with the differential motion tooth frame. A first differential motion crank fixed on a differential motion shaft is arranged on the front side of the differential motion tooth frame. The feed lifting crank, the tooth frame blocking plate, the first differential motion crank and the feed lifting shaft press and limit the main cloth feeding tooth frame and the differential motion tooth frame. The first differential motion crank is connected with the main cloth feeding tooth frame through a differential motion connecting rod. Differential motion teeth are arranged on the differential motion tooth frame. Cloth feeding teeth are arranged on the main cloth feeding tooth frame. By two-end clamping limiting, the differential motion tooth frame cannot be loosened even after long-time using.

Description

Technical field [0001] The invention belongs to the technical field of sewing machines, and particularly refers to a sewing machine feeding mechanism. Background technique [0002] The interlock sewing machine is suitable for sewing necklines and cuffs of various elastic fabrics such as knitted underwear, sportswear, T-shirts, bras, and waist skirt elastic bands. Desktop interlock sewing machine is the basic type of interlock sewing machine, which can be used for curling sewing, suitable for curling sewing on the neckline and cuff of underwear and sports shirt. In addition, there are many types of desktop interlock sewing machines, which can be installed with a variety of accessories to realize a variety of functions. They are widely used in all kinds of knitted sewing materials, such as underwear, cotton and wool underwear, sweatshirt pants, T-shirts, men's and women's underwear, and are also suitable for sewing. It can produce various styles of knitted fashion, knitted outerwe...

AI Technical Summary

Problems solved by technology

The differential rack of this mechanism has only one baffle plate fixed on the main feeding rack to limit its position, so the differential rack is easy to loosen after a period of use, resulting in unstable feeding, noise and other problems, and The structure of this kind of feeding mechanism is relatively complicated, the assembly difficulty and parts processing are relatively difficult, and the production cost is relatively high.

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