An automatic shearing and separating device for a sewing machine cutter

Abstract

The invention provides an automatic shearing and separating device for a cutter of a sewing machine and belongs to the technical field of sewing machine manufacturing. The device solves the problems of an existing sewing machine cutter clutch mechanism that switching is complicated and efficiency is low. The sewing machine comprises a machine head and the cutter, wherein a panel is fixedly connected to the front end face of the machine head, a cutter shaft is arranged in the machine head, and the cutter is located on the bottom of the cutter shaft. The automatic shearing and separating device comprises an embedding cylinder and a separating cylinder, wherein a reset spanner is fixedly connected to a piston rod of the separating cylinder. A shifting rod and a first spring are arranged in the machine head, a guiding frame is fixedly connected to the outer side of the cutter shaft, an embedding groove is formed in the guiding frame, the cutter shaft is sleeved with a second spring, one end of the second spring abuts against the guiding frame, and the other end of the second spring abuts against the bottom of the machine head. When the embedding cylinder enables the cutter shaft to move downwards, the shifting rod can be embedded into the embedding groove under the elastic force of the first spring, and the separating cylinder can make the shifting rod leave the embedding groove through the reset spanner. The automatic shearing and separating device has the advantage of being high in automation degree.

Description

technical field [0001] The invention belongs to the technical field of sewing machine manufacturing, and relates to an automatic cutting and separating device for a sewing machine cutter. 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 to interweave or sew one or more layers of sewing material. The sewing machine includes a side cutter lockstitch sewing machine, which is characterized in that the selvedge is also trimmed neatly by the cutter while sewing. [0003] Existing sewing machines, for example, Chinese patent literature discloses a side cutter lockstitch sewing machine [application number: 201420553767.2; authorization announcement number: CN204125714U] with a cutter clutch mechanism, which includes a machine head, and the operating end of the machine head forms a machine head cavity. Cavity, the end face of the operating end of the machine head is connected to the p...

AI Technical Summary

Problems solved by technology

[0004] The side cutter lockstitch sewing machine with a cutter clutch mechanism of this kind of structure realizes the material cutting work of the cutter and the return of the cutter to the original position by manually pulling the falling knife wrench and the knife lifting wrench, which requires manual operation by the operator. , the switch is cumbersome, the operation is slow, and the efficiency is low; and the side cutter lockstitch sewing machine with a cutter clutch mechanism of this structure is installed in the cavity of the machine head in order to achieve the purpose of trimming through the falling knife wrench and the lifting knife wrench. A large number of transmission and connecting parts, complex structure and low adaptability

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