Oil-proof device for needle bar of sewing machine

Abstract

The invention belongs to the technical field of sewing machines, and particularly relates to an oil-proof device for a sewing machine needle bar. The oil-proof device comprises the needle bar, a return oil storing device capable of collecting lubricating oil leaking between the needle bar and a needle bar lower bush is arranged on the needle bar, a return oil pipe is arranged at one side of the needle bar, the oil sucking end of the return oil pipe is located above the return oil storing device, and the return oil pipe is connected with the return oil device; in the vertical motion process, the needle bar drives the return oil storing device to move vertically, the return oil storing device moves to make contact with the oil sucking end of the return oil pipe, and the return oil pipe adsorbs lubricating oil in the return oil storing device through the return oil device and returns the oil. By means of oil return of the return oil pipe, the problem of leaked oil on the needle bar contaminates a sewing material is solved fundamentally, and the technical problem that fabric is contaminated due to lubricating oil leakage is avoided.

Description

Technical field: [0001] The invention belongs to the technical field of sewing machines, in particular to an oil-proof device for needle bars of sewing machines. Background technique: [0002] During the use of the sewing machine, the needle bar needs to move at high speed, and the gap between the needle bar and the lower bush of the needle bar is easy to wear. In order to reduce wear, oil lubrication is required for high-speed moving parts. Since there is a gap between the needle bar of the sewing machine and the lower bushing of the needle bar, oil will inevitably seep out of the gap during use. In order to prevent the leaked oil from polluting the sewing material, it is necessary to carry out deal with. [0003] The notification number is that the patent document CN 204875131 U discloses a needle bar oil return device for an overlock sewing machine, such as figure 1 , figure 2 Shown: [0004] It includes a needle bar body 1 and an oil return groove 2 arranged at the...

AI Technical Summary

Problems solved by technology

[0008] During the use of this solution, there will inevitably be continuous friction between the oil return scraper 3 and the oil felt 4, and the oil resistance of the oil return scraper 3 and the oil felt 4 will continue to weaken during the friction process, and the amount of oil seepage will increase with the sewing machine. The increase in use time increases, so the life and reliability of the solution cannot be guaranteed

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