Small-diameter cylinder sewing machine

Abstract

The invention discloses a small-diameter cylinder sewing machine. The machine comprises a rack, a head arranged on the rack and a cylinder located below the head, wherein an eccentric mounting throughhole located above the axis of the cylinder is formed in the cylinder, a moving cutter shaft barrel is mounted in the eccentric mounting through hole, and a rotating hook shaft is mounted in the moving cutter shaft barrel; the moving cutter shaft barrel and the rotating hook shaft share one drive motor as power; the motor is connected with a drive shaft, and a cam seat and a drive assembly are connected onto the drive shaft; the cam seat is linked with a crank connecting rod assembly linked with the moving cutter shaft barrel; the drive assembly is linked with the rotating hook shaft; a clutch control assembly is used for controlling separation and combination of the crank connecting rod assembly and the cam seat to realize intermittent thread trimming. Thus, structural design of the cylinder, the moving cutter shaft barrel and the rotating hook shaft is used, the moving cutter shaft barrel and the rotating hook shaft share one drive motor as power, so that the design space is effectively saved, miniaturization design of the cylinder is facilitated, and the thread trimming demand of small object or small area processing is met.

Description

technical field [0001] The invention relates to the technology in the field of sewing machines, in particular to a small-diameter cylinder sewing machine. Background technique [0002] The cylindrical sewing machine in the prior art has a poorly designed thread trimming device, which leads to a large design space occupied by the thread trimming device, which is not conducive to the miniaturization design of the cylindrical sewing machine; therefore, if a small-sized cylindrical sewing machine is designed, It is difficult to achieve automatic thread trimming, which makes it difficult for existing sewing machines to perform automatic arc sewing and thread trimming on small objects and small-sized processing areas, or to automatically sew and thread trimming on cylindrical sewing workpieces with small diameters ;For small items, such as baby and children's clothing, after sewing, if the thread is trimmed manually, the work efficiency is very low, and if a larger cylinder sewing...

AI Technical Summary

Problems solved by technology

[0002] The cylindrical sewing machine in the prior art has a poorly designed thread trimming device, which leads to a large design space occupied by the thread trimming device, which is not conducive to the miniaturization design of the cylindrical sewing machine; therefore, if a small-sized cylindrical sewing machine is designed, It is difficult to achieve automatic thread trimming, which makes it difficult for existing sewing machines to perform automatic arc sewing and thread trimming on small objects and small-sized processing areas, or to automatically sew and thread trimming on cylindrical sewing workpieces with small diameters ;For small items, such as baby and children's clothing, after sewing, if the thread is trimmed manually, the work efficiency is very low, and if a larger cylinder sewing machine is used for processing, the length of the remaining thread is longer, and manual trimming is time-consuming and laborious. It is not conducive to the improvement of sewing processing quality

[0003] In addition, most of the existing thread trimming devices have the disadvantages of complex structure, high manufacturing cost, poor stability of thread trimming control, etc.

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