Thread shearing mechanism of pattern sewing machine

Abstract

The invention provides a thread shearing mechanism of a pattern sewing machine, belongs to the technical field of sewing devices and aims at solving the technical problem of low accuracy of thread shearing actions and the like of the thread shearing mechanism of an existing pattern sewing machine. The thread shearing mechanism comprises a motor and a mounting base, wherein the motor is fixedly arranged on the mounting base; an eccentric wheel is fixedly arranged on an output shaft of the motor; the mounting base is hinged with a driving rod; the eccentric wheel props against the driving rod and is capable of enabling the driving rod to swing around a hinge point; the driving rod is connected with a connection rod and is capable of driving the connection rod to carry out reciprocal rectilinear motion; one end of the connection rod is hinged with the driving rod; the other end of the connection rod is connected with a shearing structure; the shearing structure comprises a fixed blade and a movable blade; the connection rod is hinged with the movable blade and is capable of driving the movable blade and the fixed blade to do shearing motion; a sensor capable of sending the rotation position of the eccentric wheel is also fixedly arranged on the mounting base. According to the thread shearing mechanism of the pattern sewing machine, the shearing structure and a power structure are partitioned; the connection rod is used for transmitting moment; the layout and the installation of the inner space of the sewing machine are facilitated.

Description

technical field [0001] The invention belongs to the technical field of sewing equipment, and relates to a pattern sewing machine, in particular to a thread trimming mechanism of the pattern sewing machine. Background technique [0002] The electronic pattern machine is the most advanced machine used in the handbag factory, shoe factory, luggage factory, garment factory, leather goods factory and furniture factory. It can realize the traditional manual pattern with high speed and high efficiency, and can also realize The requirements of "multi-level, multi-functional, uniform and perfect" cannot be achieved by hand-made patterns. It is an electromechanical product that embodies a variety of high-tech. The thread trimming mechanism is an important part of the pattern sewing machine, which is used for automatic thread trimming during the sewing process, which can greatly improve the sewing efficiency. [0003] my country's patent (notification number: CN202705688U; announceme...

AI Technical Summary

Problems solved by technology

[0004] The automatic thread trimming device of the sewing machine provided by the above-mentioned patent drives the movable knife to move through the connecting rod, thereby forming a shearing motion together with the fixed knife to complete the thread-cutting action. The connecting rod is driven by the transmission rod and the electromagnet, and its movement process is poor in stability. The driving accuracy of iron is poor, and the timing of electromagnet energization is not easy to control, which may easily cause malfunction or slow response and reduce work efficiency

Images