A rear tug wheel device for a sewing machine

Abstract

The invention provides a rear puller device for sewing machines, belongs to the technical field of sewing machines and solves the problem that after a puller on an existing sewing machine is mounted, the angle is not adjustable. The rear puller device for sewing machines is characterized in that a guide sleeve is fixedly connected to a nose, a vertical shaft is disposed inside the guide sleeve, an upper support is connected to the lower end of the vertical shaft, an upper puller is connected to the upper support, a lower puller is connected to a bench, the vertical shaft is sleeved with a spring, a first adjusting mechanism is disposed between the upper support and the upper puller, a second adjusting mechanism is disposed between the lower puller and the bench, a spindle is further connected inside the nose, a transverse shaft is rotatably connected to the guide sleeve, a link mechanism is disposed between one end of the transverse shaft and the spindle, and a second link mechanism is disposed between the other end of the transverse shaft and the upper puller. The rear puller device for sewing machines can produce large cloth-feeding force, and the angle of the upper puller can be adjusted.

Description

technical field [0001] The invention belongs to the technical field of sewing machines, and relates to a rear tug wheel device of a 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 to interweave or sew one or more layers of sewing material. The sewing machine can sew fabrics such as cotton, fiber crops, silk, wool, and artificial fibers, and products such as leather, plastics, and paper. The categories of sewing machines can be divided into household sewing machines, industrial sewing machines and service industry sewing machines in between according to the purpose of sewing machines. Most of the industrial sewing machines are general-purpose sewing machines, including lockstitch sewing machines and chain sewing machines. , quilting machine, overlock sewing machine and interlock sewing machine, etc. [0003] The feeding method of the traditional sewing machin...

AI Technical Summary

Problems solved by technology

[0003] The feeding method of the traditional sewing machine is the feeding dog, and partly the needle and the presser foot participate in the feeding together with the feeding dog. The feeding force of this feeding method is limited, especially for sewing materials with special materials, the feeding is more difficult. Appears as stitches that are too small

Based on the above problems, the traditional method is to add an external mop wheel device. The external mop wheel has a large structure, and the effect of the whole machine is not beautiful after assembly. At the same time, the bottom plate of the external mop wheel cannot be equipped with a lower mop wheel, resulting in a relatively low cloth feeding force. Small, and the angle cannot be adjusted after the upper mop wheel is installed, it is easy to bend the sewing material when feeding the cloth

Images