Lubricating structure of rotating shuttle of sewing machine

Abstract

The invention provides a lubricating structure of a rotating shuttle of a sewing machine, and belongs to the technical field of sewing machines. The problem that lubricating oil is easy to accumulate and leak after the rotating shuttle of an existing sewing machine stops working is solved. The sewing machine comprises the rotating shuttle, a rotating shuttle shaft and a shaft sleeve, the rotating shuttle and the shaft sleeve are arranged on the rotating shuttle shaft in a sleeving mode, and an oil inlet is formed in the shaft sleeve; the lubricating structure comprises an oilcan, a first oil line and a second oil line, the inner end of the first oil line is connected with an oil outlet of the oilcan, and the inner end of the second oil line is connected to the oil inlet of the shaft sleeve; the outer end of the second oil line is connected with an oil cut-off base, and the lubricating structure further comprises a driving part connected with the oil cut-off base; the driving part can drive the oil cut-off base to move in a reciprocating mode and make the outer end of the second oil line and the outer end of the first oil line in contact with or separated from each other. According to the structure, the oil cut-off base is arranged, and the phenomenon of oil seepage or oil leakage caused by excessive flowing of lubricating oil at the rotating shuttle can be effectively prevented when the sewing machine stops working.

Description

technical field [0001] The invention belongs to the technical field of sewing equipment, and relates to a lubricating structure for a rotary hook 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 rotary hook is an important part of the sewing machine. It hooks the thread loop with its hook tip, expands the thread loop at the same time, and guides the thread loop around the bobbin to form a lock stitch. Since the hook is always running at high frequency, it is very important to keep it lubricated. [0003] Chinese patent (notification number: CN201180213, publication date: 2009-01-14) discloses a non-polluting lubrication system for sewing machines, which includes a rotary hook and a needle bar. Hook shaft, high-speed rotary hook mechanism, the internal cavity of the hollow rotary hook shaft i...

AI Technical Summary

Problems solved by technology

[0004] The lubricating system in the above-mentioned patent documents uses the oil suction line to absorb oil from the oil storage tank to supply oil to the rotary hook to achieve the lubrication effect. The oil suction line is always connected. When the sewing machine is not in use, the oil-absorbing thread has been supplying oil through the capillary phenomenon. After a long period of accumulation, the amount of oil in the rotary hook part will exceed the standard, and oil leakage will occur.

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