Cloth feed dog frame for sewing machine

Abstract

The invention relates to the sewing machinery field, in particular to a cloth feed dog frame for a sewing machine. The cloth feed dog frame for the sewing machine comprises a frame body and a feed dog installed on the frame body, and further comprises a rocking arm mechanism which is connected with the frame body and enables the frame body to move left and right, and a dog lifting mechanism which moves the feed dog up and down, wherein a slide chute is formed in the front side of the middle of the frame body, a slide block is matched in the slide chute, the feed dog is fixed on the slide block through a second locking bolt, an adjustment groove matched with the second locking bolt is formed in the feed dog, one side of the feed dog is attached to the frame body, a cushion plate is further arranged between the other side of the feed dog and the frame body, and the cushion plate is fixed on the frame body through a fixing bolt. The cloth feed dog frame for the sewing machine can adjust the height of the feed dog so as to meet different demands, and simultaneously can further reduce abrasion rate of the feed dog, and prolongs use life of the feed dog.

Description

technical field [0001] The invention relates to the field of sewing machines, in particular to a cloth feeding tooth frame for sewing machines. Background technique [0002] With the development of science and technology and the progress of the times, sewing machinery is also moving towards mechanization and automation at a high speed. However, to get the approval of customers, not only mechanization and automation are enough, but also durable and effective. The main factor to be recognized by customers. [0003] The feed dog frame is an indispensable part of the sewing machine. The old-fashioned tooth frame device includes a frame body, a cloth feed dog, a cloth feed crank and a tooth lifting crank. The cloth feeding dog is set on the top of the tooth frame. It is connected with the two ends of the tooth frame and the tooth-lifting crank is located at the lower end of the connection between the tooth-lifting crank and the frame body. When the tooth-lifting crank is driven ...

AI Technical Summary

Problems solved by technology

[0003] The feed dog frame is an indispensable part of the sewing machine. The old-fashioned tooth frame device includes a frame body, a cloth feed dog, a cloth feed crank and a tooth lifting crank. The cloth feeding dog is set on the top of the tooth frame. It is connected with the two ends of the tooth frame and the tooth-lifting crank is located at the lower end of the connection between the tooth-lifting crank and the frame body. When the tooth-lifting crank is driven by the lower shaft to make a circular motion, the upper plane of the feeding dog's movement track is an inclined plane, resulting in The feeding stability of the cloth dog is not high, and it is easy to cause broken needles or broken threads. Most of the tooth frames now use a whole piece of frame body, and the cloth feeding dog is embedded in the frame body, and the height of the feeding dog is adjusted by bolts. This can improve the stability of cloth feeding, but the cloth feeding dog embedded in the frame body is easy to wear, and will swing after wearing, which seriously affects the effect of cloth feeding, which will lead to uneven stitch length and affect the quality of sewing. It needs to be replaced frequently, usually in about 2 months.

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