Cloth feeding mechanism for sewing machine

Abstract

The invention provides a cloth feeding mechanism for a sewing machine, and belongs to the technical field of sewing machines. The problems of complexity in an upward-downward comprehensive cloth feeding structure and high manufacturing cost of the prior art are solved. The cloth feeding mechanism for the sewing machine comprises a main shaft, a needle bar, a pressure bar and a cloth feeding tooth driving shaft for driving a cloth feeding tooth to move, wherein an outer presser foot is fixedly connected to the lower end of the pressure bar. The cloth feeding mechanism also comprises an inner presser foot and a presser foot connecting rod, wherein the inner presser foot is fixedly connected to the lower end of the presser foot connecting rod; the needle bar is connected to the presser foot connecting rod, and can slide up and down on the presser foot connecting rod; the needle bar is radially fixed relative to the presser foot connecting rod; a forward-backward swinging mechanism capable of driving the presser foot connecting rod to swing forwards and backwards when the main shaft rotates is arranged between the presser foot connecting rod and the main shaft; an upward-downward movement mechanism capable of driving the presser foot connecting rod to move upwards and downwards when the main shaft rotates is also arranged between the presser foot connecting rod and the main shaft. The cloth feeding mechanism has the advantages of simple structure, low manufacturing cost and the like.

Description

technical field [0001] The invention belongs to the technical field of sewing machines, and relates to a cloth feeding mechanism of a sewing machine. Background technique [0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material to interweave or sew one or more layers of sewing material. [0003] Thick material sewing machine is a kind of sewing machine that is widely used. It is mainly suitable for sewing various container bags, slings, seat belts, tents, leather and other extremely heavy materials. At present, the feeding methods of heavy-weight sewing machines are divided into two types: upper and lower composite feeding and upper and lower composite feeding. , presser foot, and cloth feeding dog feed cloth together, that is, three synchronizations. Two different cloth feeding methods are suitable for different sewing materials. The upper and lower compound feeding methods are mainly suitable for two-...

AI Technical Summary

Problems solved by technology

Even if the sewing machine with two feeding methods can be produced at the same time, due to the large structural difference between the traditional comprehensive feeding thick material machine and th...

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