A sewing machine thread trimming drive mechanism

Abstract

The invention provides a thread trimming driving mechanism of a sewing machine. The thread trimming driving mechanism comprises a thread trimming knife disk, a thread loosening crank, a first guide block, a second guide block, a first connecting plate, a second connecting plate, a swing plate, a guide shaft, a thread trimming driver and a driver installation plate. A shell of the sewing machine comprises an upper shell body and a bottom shell body. The thread trimming driver is fixed to the outer wall of the bottom shell body right in front of the thread trimming knife disk through the driver installation plate, a support is installed at the upper end of a shell of the thread trimming driver, the guide shaft is supported by the support, the guide shaft is located above a telescopic shaft of the thread trimming driver and is parallel to the telescopic shaft, and one end of the guide shaft and the outer end of the telescopic shaft are both fixed with the first connecting plate. Both the first guide block and the second guide block are fixed with the guide shaft through fastening pieces. The first guide block is connected with the thread trimming knife disk through the second connecting plate. The second guide block is connected with the thread loosening crank through the swing plate. According to the thread trimming driving mechanism, an oil filter is avoided at the installation position of the sewing machine, so that the sewing machine is convenient to maintain and the thread trimming stability is good.

Description

technical field [0001] The invention relates to the technical field of sewing equipment, in particular to a thread trimmer driving mechanism of a sewing machine. Background technique [0002] With the rapid development of science and technology, the degree of mechanization of clothing manufacturing is getting higher and higher. In the field of clothing manufacturing technology, there are many sewing equipment mainly based on sewing machines, such as lockstitch sewing machines, overlock sewing machines, interlock sewing machines, etc. [0003] The stitches sewn by interlock sewing machines are chain sewing stitches, which are mostly used for rolling collars, piping, hemming, interlock seams, splicing seams and trims of knitted garments, and are necessary sewing for large garment factories equipment. [0004] The thread trimming drive mechanism of the prior art interlock sewing machine has a large volume and takes up a large installation space. When the oil filter of the sew...

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Problems solved by technology

[0004] The thread trimming drive mechanism of the prior art interlock sewing machine has a large volume and takes up a large installation space. When the oil filter of the sewing machine needs to be maintained and replaced, the thread trimming drive mechanism must be removed before proceeding. On the one hand, it is inconvenient for the user to maintain and replace the oil filter. On the other hand, the repeated disassembly and assembly of the thread trimmer drive mechanism It will also cause the subsequent installation position to deviate from the initial installation position, resulting in position changes, which will affect the stability of the thread trimmer

[0005] In addition, the thread trimming drive mechanism of the prior art interlock sewing machine has a large volume and complex structure, and the economic cost of its components is also high, so the configuration cost of the thread trimming drive mechanism is high, and the production cost of the interlock sewing machine is high.

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