An anti-loosening sewing machine needle bar fixing structure

Abstract

An anti-loosening sewing machine needle bar fixing structure relates to the field of sewing machines. The invention solves the problem of machine needle loosening. The needle bar fixing structure of the anti-loosening sewing machine includes a needle bar, a sealing sleeve, a piston rod and a piston; the inside of the needle bar is designed as a cylindrical counterbore structure, and the needle bar is slidably assembled on the transmission shaft of the sewing machine; The sealing sleeve is designed to be cylindrical, and the inside of the sealing sleeve is designed as a conical counterbore structure, and the sealing sleeve is fixedly installed in the cylindrical counterbore of the needle bar; the piston is slidably fitted on the needle bar In the cylindrical counterbore; the piston rod is fixedly connected with the piston; using the principle of the syringe, by changing the size and position of the air pressure, the fixed state of the needle is controlled, and the needle is fixed more firmly through the anti-reverse sliding track , is not affected by external factors, and uses a simple structure to achieve the purpose of relaxation and movement.

Description

technical field [0001] The invention relates to the field of sewing machines, in particular to a sewing machine needle bar fixing structure. Background technique [0002] Machine needles, also known as sewing needles and car needles, are important components of sewing machines. During the sewing process, the machine needles penetrate the fabric thousands of times per minute. Needle contacts are subject to various loads, especially when used on thick or hard fabrics. [0003] The traditional method is to fix the sewing machine needle with the needle clamp screw. When the sewing machine is working, the needle clamp screw will loosen due to the vibration of the needle movement due to the continuous up and down movement of the sewing machine needle, causing the needle to move up and down and affecting the sewing machine. Sewing effect, and even cause damage to machine needles and sewing machine hardware, so there are defects. Contents of the invention [0004] In order to so...

AI Technical Summary

Problems solved by technology

[0003] The traditional method is to fix the sewing machine needle with the needle clamp screw. When the sewing machine is working, the needle clamp screw will loosen due to the vibration of the needle movement due to the continuous up and down movement of the sewing machine needle, causing the needle to move up and down and affecting the sewing machine. Sewing effect, even lead to damage to the needle, sewing machine hardware, so there are defects

Images