Novel barrel type sewing machine

Abstract

The invention relates to the technical field of sewing devices, in particular to a novel barrel type sewing machine. The novel barrel type sewing machine includes a sewing machine body, an oil tan, and a fabric feeding mechanism, a stitch length locking mechanism, a pre-winding device, a dual-clamping machine, and an automatic lubrication system which are arranged on the sewing machine body; the fabric feeding mechanism includes a lower shaft, a tooth lifting cam, a tooth lifting fork, a tooth lifting shaft, a fabric feeding tooth guide rack, a fabric feeding tooth guide rack slide block, a fabric feeding tooth support, a fabric feeding tooth support shaft, a fabric feeding support slide block, and a fabric feeding tooth support positioning plate; the stitch length locking mechanism includes a stitch length button, a locking pin and a locking pin spring; and the pre-winding device includes a base, a winding shuttle core, a shuttle core shaft, a cutter, a shuttle core seat, a winding positioning wheel, a friction wheel, a winding positioning hook, and a limiting adjustment wrench which are fixed on the sewing machine body. The mechanical structure of the conventional sewing machine is changed, the automatic lubrication system is added, the performance of the sewing machine is fully improved, and the novel barrel type sewing machine has good application prospect and economic benefits.

Description

Technical field [0001] The invention relates to the technical field of sewing equipment, in particular to a new type of cylinder sewing machine. Background technique [0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material, so that one or more layers of sewing material are interwoven or stitched together. However, the existing cylindrical sewing machines on the market have the following drawbacks: First, because the cloth feeding mechanism of the existing cylindrical sewing machine uses a high-pair movement lifting cam and a lifting fork structure, and the tubular structure makes the lifting position The space is very small, not only the thickness of the lifting fork is limited, and the stress point of the sewing machine is just at the connection of the high pair, so that the feeding frame of the sewing machine needs to be replaced in two or three months, which increases the production cost. ; Second, the man...

AI Technical Summary

Problems solved by technology

However, the existing cylinder sewing machines on the market have the following defects: First, because the cloth feeding mechanism of the existing cylinder sewing machines uses a high-pair movement tooth-lifting cam and tooth-lifting fork structure, and the cylinder structure makes the tooth-lifting place The space is very small, not only the thickness of the lifting fork is limited, but also the stress point of the sewing machine is just at the joint of the high pair, so that the feed dog of the sewing machine needs to be replaced in two or three months, which increases the production cost ;Secondly, the way of manually injecting lubricating oil every day can not control the amount of refueling stably, which may easily cause insufficient lubrication of all parts that need to be lubricated, resulting in the machine's running speed not increasing, and it is also easy to cause high-speed seizure of running parts; Thirdly, the needle distance dial is fixed by a 60°taper metal pin and the dial teeth. Because the tooth shape of the plastic dial is easy to wear, when sewing thick materials, the needle distance screw is loose and the needle distance is unstable, which affects the sewing quality. ; Its 4th, adopt manual way to pre-wind the bobbin thread for each bobbin, the operation is loaded down with trivial details, time-consuming and laborious; 5th, existing sewing machine generally uses single-knob thread tensioner, because its clamping force is limited, sometimes need to be used when sewing material. The thread clamp is tightened very tightly. If the thread clamp spring is under overload pressure for a long time, it is very easy to cause the tension of the upper thread to be unstable, resulting in unstable sewing stitches and seriously affecting product quality.

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