Needle distance adjustment structure of platform type interlock sewing machine

Abstract

The invention provides a needle pitch adjusting mechanism of a platform type flat seaming machine. The needle pitch adjusting mechanism comprises a lower shaft on which a lifting bell sliding block, a cloth adjuster and an adjuster sleeve are sequentially sleeved on the lower shaft in an axial direction, wherein the adjuster sleeve is fixedly connected with the lower shaft, and the cloth feeding adjuster is provided with an adjuster limit device capable of limiting the cloth feeding adjuster to rotate; the cloth feeding adjuster is sleeved with an eccentric bearing sleeve on which a needle bearing is sleeved, a differential cloth feeding frame is sleeved on the needle bearing, and the adjuster sleeve is fixedly connected with the eccentric bearing sleeve; one end of the differential cloth feeding frame which is far away from the lower shaft is provided with a cloth feeding sliding block rail in which a cloth feeding sliding block is arranged; the cloth feeding sliding block is hinged to the feed dog frame, one end of the feed dog frame nearby the lower shaft is provided with a lifting bell sliding block rail in which the lifting bell sliding block slides in the lifting bell sliding block rail. According to the needle pitch adjusting mechanism of the platform type flat seaming machine provided by the invention, the needle pitch adjusting scope can be improved and is 3.0-7.5mm, the sewing scope of a flat seaming machine is wider, and an aim that the needle pitch adjusting mechanism is available to small and big needle pitches can be achieved.

Description

technical field [0001] The invention relates to a needle distance adjustment structure of a platform type interlock sewing machine. Background technique [0002] Interlock sewing machine is also called special sewing machine. The stitches it sew are chain sewing stitches, which are mostly used for rolling collars, piping, hemming, flat seams, splicing seams and trims of knitted garments. [0003] At present, the needle pitch adjustment range of platform interlock sewing machine has two types: 1.0-4.5mm and 4.5-7.5mm. If the user uses a machine with a large stitch length, he will no longer be able to sew fabrics with a small stitch length. Therefore, it is designed according to customer needs. An interlock sewing machine that combines large stitch length and small stitch length, realizing the common use of large stitch length and small stitch length. Contents of the invention [0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present ...

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Problems solved by technology

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a platform-type interlock sewing machine needle pitch adjustment structure, which is used to solve the problem that the interlock sewing machine needle pitch adjustment range in the prior art is small and cannot fully meet customer needs. The problem

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