Sewing machine and thread take-up and needle driving mechanism thereof

Abstract

The invention relates to the technical field of sewing machines, in particular to a thread take-up and needle driving mechanism of a sewing machine and the sewing machine comprising the thread take-upand needle driving mechanism. The thread take-up and needle driving mechanism comprises a thread take-up assembly, a thread take-up drive part, a needle driving assembly and a needle driving drive part, wherein the thread take-up drive part is connected with the thread take-up assembly and drives the thread take-up assembly to execute a thread take-up action; and the needle driving drive part isconnected with the needle driving assembly and drives the needle driving assembly to execute a needle driving action. The thread take-up assembly and the needle driving assembly are independently driven by the thread take-up drive part and the needle driving drive part respectively, and mechanical structures such as a synchronous wheel, a synchronous belt and a tensioning wheel assembly can be omitted, so that the structure of the thread take-up and needle driving mechanism is simplified; and moreover, precise adjustment of a phase relationship between the thread take-up assembly and the needle driving assembly can be achieved through independent adjustment of the thread take-up drive part and the needle driving drive part, so that the phase difference between the thread take-up assembly and the needle driving assembly meets different sewing requirements, and accurate linkage of the thread take-up assembly and the needle driving assembly is guaranteed.

Description

technical field [0001] The invention relates to the technical field of sewing machines, in particular to a thread take-up and stabbing mechanism of a sewing machine and a sewing machine comprising the thread-taking and stabbing mechanism. Background technique [0002] In the sewing machine, the thread take-up and pricking mechanism is a mechanism that drives the thread take-up assembly to move the thread take-up lever reciprocatingly to realize thread supply and take-up, and drives the pricking cloth assembly to move the needle bar up and down to realize pricking. [0003] In the prior art, the thread take-up assembly and the barbed cloth assembly are respectively connected to a shaft, and the two shafts are connected through a synchronous wheel, a synchronous belt and a tensioning wheel assembly, and a motor is set to drive one of the shafts to rotate, and the synchronous wheel And the synchronous belt drives another shaft to rotate, so that a motor drives the thread take-u...

AI Technical Summary

Problems solved by technology

In this structure, the synchronous relationship between the thread take-up assembly and the barbed cloth assembly, that is, the synchronous relationship between the thread take-up lever and the needle bar, is realized by adjusting the locking screw on the synchronous wheel. Not only does it need to disassemble the relevant structure, but also the accuracy after debugging is relatively poor, and it is difficult to ensure the accurate phase difference between the thread take-up rod and the needle rod

For different sewing occasions, such as thick and thin materials, cotton thread and silk light, etc., the take-up of the thread take-up lever will be different sooner or later due to the requirements of different fabrics and sutures, so it is necessary to change the thread take-up lever according to the different fabrics and sutures. Due to the phase difference with the needle bar, the above-mentioned existing structure cannot achieve accurate and convenient debugging, and cannot adapt to the sewing requirements of different fabrics and sutures

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