Lubricating device for sewing machine

Abstract

An oil supply device for a sewing machine capable of adjusting the amount of oil supplied to an oil supply point (rotary hook) regardless of the operating speed of the sewing machine and at the same time uniformly adjusting the amount of oil supplied to the oil supply point. Driven by the oil tank 2 located at the base of the sewing machine, driven by the driving force transmitted by the driving device of the sewing machine, the plunger-type oil pump 4 that can extract lubricating oil from the oil tank 2 and supply it to the rotary hook 9 communicates with the oil tank 2 and the plunger-type oil pump respectively. 4 and the hook part 9 and guide the lubricating oil pumped by the plunger type oil pump 4 to the oil supply pipe 3 of the hook part 9, and return part of the lubricating oil supplied to the hook part 9 from the oil supply pipe 3 to the oil tank 2 oil return pipeline 8 composition. On the oil return line 8, there is an oil quantity regulating member 7 that adjusts the oil quantity supplied to the rotary hook 9 by adjusting the oil quantity flowing through the oil return line 8. On the oil supply pipe 3, it is detachably installed for A filter 5 that removes foreign matter in the fuel supply pipe 3.

Description

technical field [0001] The present invention relates to a sewing machine oil supply device for supplying oil to sliding parts such as a rotary hook of an industrial sewing machine. Background technique [0002] For example, in the hook portion of a sewing machine, lubricating oil is supplied to the mating portion of the inner hook and the outer hook so that the outer hook rotates uniformly with respect to the inner hook. As this oil supply method, there is a method of forcibly supplying oil by installing an oil pump that draws lubricating oil from the oil tank located on the sewing machine base, or by using the capillary phenomenon or surface tension between the oil tank and the oil supply point to supply oil to the hook. Point oil supply, that is, through the connection of the oil core, the lubricating oil is transferred in the oil core, and the oil is supplied from the oil tank to the oil supply point. The power used by these oil supply pumps is generally output from the ...

AI Technical Summary

Problems solved by technology

[0009] However, in the above structure, when the lubricating oil is drawn from the oil tank 102 by the oil pump 104, the foreign matter (impurity) mixed into the oil tank 102 is also drawn out, and it is blocked at the pipe diameter adjustment part, which may cause the pipe diameter to be incorrectly adjusted and supplied to the oil tank. The amount of oil at the oil point (hook part 103) cannot be adjusted well

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