Lubrication structure for needle bar sleeve of sewing machine

Abstract

The invention relates to a lubrication structure for a needle bar sleeve of a sewing machine. The sewing machine is provided with a machine head in which a needle bar module is installed, wherein the needle bar module comprises a vertical needle bar connected with a driving part and a needle bar sleeve connected at the lower end of a machine head shell and sleeved outside a needle bar. The lubrication structure comprises a needle bar sleeve main body, wherein a concentric needle bar sleeve with inner diameter reduced is arranged at the lower end of the needle bar sleeve main body; and an oil storage groove is arranged on the inner wall of the needle bar sleeve. The lubrication structure is characterized in that a wick is arranged in the oil storage groove. The lubrication structure has the following beneficial effects: the wick is arranged in the oil storage groove on the inner wall of the needle bar sleeve and most oil is controlled in the wick, so that the oil in a crack between the needle bar and the needle bar sleeve is moderate, is uniformly distributed and is not easy to leak; and oil absorption felts can be arranged at the upper and lower ends of the needle bar sleeve to absorb the redundant oil and prevent dust from entering, so that the whole structure has good lubrication effect and is pollution-free.

Description

technical field [0001] The invention relates to a lubricating structure, in particular to a liquid grease lubricating structure for a needle bar cover in the field of sewing machines. Background technique [0002] When the sewing machine is working, the needle bar at the machine head moves up and down at high frequency, and rubs against the needle bar sleeve on the outside of it, which easily generates high temperature and sintering. Therefore, people add lubricating grease to the gap between the needle bar and the needle bar cover to ensure the long-term safe and smooth work of the needle bar. However, it is usually difficult to control the amount of lubricating grease injected into the liquid state. When the amount of oil is small, the grease is easily unevenly distributed in the crack; when the amount of oil is large, it is easy to overflow from the end of the crack and pollute the sewing material. Contents of the invention [0003] The invention overcomes the disadv...

AI Technical Summary

Problems solved by technology

However, it is usually difficult to control the amount of lubricating grease injected into the liquid state. When the amount of oil is small, the grease is likely to be unevenly distributed in the crack; when the amount of oil is large, it is easy to overflow from the end of the crack and pollute the sewing material.

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