Industrial sewing machine with electronic stitch length adjusting mechanism

Abstract

The invention relates to the field of sewing equipment, in particular to an industrial sewing machine with an electronic stitch length adjusting mechanism. The industrial sewing machine is controlled through a stepping motor, the functions of electronic stitch length adjusting, electronic backward stitching and electronic dense sewing are achieved, when the stitch length is adjusted, sewing for the stitch length with several millimeters can be achieved as long as digits are input on an operation panel, the coincidence of forward stitching and backward stitching can be adjusted through the operation panel, fast switching of backward stitching and dense stitching can be achieved, the structure is more simple, and operation is more convenient. The industrial sewing machine with the electronic stitch length adjusting mechanism comprises a machine head and further comprises a stepping motor, a stitch length adjusting crankshaft and a stitch length adjusting connecting rod. The stepping motor is arranged on the right end face of the machine head, the motor shaft of the stepping motor is arranged on a shaft sleeve on the machine head, a crankshaft is fixed to the front end of the motor shaft, the crankshaft and one end of the stitch length adjusting connecting rod are connected through a screw, and the other end of the stitch length adjusting connecting rod is connected with the stitch length adjusting crankshaft.

Description

1. Technical field: [0001] The invention relates to the field of sewing equipment, in particular to an industrial lockstitch sewing machine with an electronic needle distance adjustment mechanism. 2. Background technology: [0002] At present, lockstitch sewing machines mostly use mechanical methods to adjust the stitch length. Different mechanisms are required to realize the change of stitch length, reverse stitching, and dense stitching, and most of the mechanisms are crank-link mechanisms. When the sewing machine is running at high speed, the connecting rod will vibrate slightly and make abnormal noises. When adjusting the stitch length, it is necessary to manually rotate the dial of the stitch distance knob, and the design of the dial is often heavy, requiring a large force to turn the dial, and the design of the dial is light and cannot be locked well. The vibration causes the dial to rotate slightly, and the stitch length becomes unstable. At the same time, the change...

AI Technical Summary

Problems solved by technology

When adjusting the stitch length, it is necessary to manually rotate the dial of the stitch distance knob, and the design of the dial is often heavy, requiring a large force to turn the dial, and the design of the dial is light and cannot be locked well. The vibration causes the dial to rotate slightly, and the stitch length becomes unstable. At the same time, the change of the stitch length is represented by the scale printed on the dial. The difference between the actual stitch length and the displayed scale often increases, which is difficult to control; Manually overturning the sewing wrench or using the electromagnet to drive the needle distance seat to achieve reverse stitching, both of which will have the problem of poor stitch distance coincidence, and it takes a long time to adjust the machine to reduce the coincidence error; the sealing function needs to be reversed. The iron stroke is limited, and it cannot be used with the reverse sewing function at the same time

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