Feed dog assembly of sewing machine

Abstract

The invention provides a feed dog assembly of a sewing machine, and particularly relates to the technical field of sewing machine manufacturing. The feed dog assembly is provided with an up-down lifting motor and a front-back cloth feeding motor, the up-down lifting motor and the front-back cloth feeding motor apply a non-lateral swing source to feed dogs, the up-down lifting motor and the front-back cloth feeding motor indirectly act on the feed dogs to execute cloth feeding action, the front-back cloth feeding motor drives a rotating disc and then drives a connecting rod, and the connecting rod is movably connected to the eccentric position of the rotating disc. The connecting rod is movably connected with the feed dog connecting frame, and the feed dog assembly is fixedly installed on a table plate of the sewing machine in a modularized mode. The swing source is transmitted to the feed dog assembly through the up-down lifting motor and the front-back cloth feeding motor, the feed dog assembly can be additionally arranged on a bottom thread mechanism and can be manufactured to be modularized to be used on various sewing machines in a matched mode, and high popularization value is achieved.

Description

technical field [0001] The present application provides a feed dog assembly for a sewing machine, and specifically relates to the technical field of sewing machine manufacturing. Background technique [0002] A sewing machine is a sewing equipment for sewing garments, bags, shoes and hats, and quilts. In a traditional sewing machine, the main shaft motor is connected to the upper main shaft, and the main shaft motor drives the upper main shaft to rotate, thereby driving the eccentric rotating wheel, the bevel gear and the needle bar crankshaft fixed to the upper main shaft to run at the same time. In the bottom thread sewing transmission mechanism, the eccentric rotating wheel drives the feed link and the lift link at the same time, the feed link drives the feed shaft through the swing seat assembly, and the lift link drives the lift shaft through the lift crank. Swing; the cloth feed shaft and the tooth-lifting shaft are arranged on both sides of the sewing machine base, a...

AI Technical Summary

Problems solved by technology

[0004] In view of the complex mechanical transmission mechanism of the existing sewing machine feed dog assembly, this application provides a sewing machine feed dog assembly with high transmission efficiency and low manufacturing difficulty. and the front and rear cloth feed motors, the up and down lift motors indirectly act on the feed dog connecting frame and the feed dog assembly, the up and down lift motors indirectly act on the bottom of the feed dog assembly support frame, and the support The frame is in dynamic cooperation with the feed dog connection frame, and the feed dog assembly is fixedly installed on the table of the sewing machine in a modular manner

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