Sewing machine

Abstract

The invention belongs to the technical field of sewing equipment, and particularly relates to a sewing machine. An oil pump shaft which is driven to rotate by a vertical shaft is arranged in an oil pump body; the oil pump body comprises a plunger pump body and a blade pump body; a first eccentric portion and a second eccentric portion are arranged on the oil pump shaft; the first eccentric portionis positioned in the plunger pump body; the second eccentric portion is positioned in the blade pump body; a first plunger acts on the first eccentric portion; the second plunger acts on the second eccentric portion; an impeller is arranged at the lower end of the oil pump shaft and is positioned in an impeller cavity of the blade pump body; a supporting plate and an oil pump cover are successively arranged at the lower end of the blade pump body; an oil suction opening is formed in the oil pump cover; a first oil supply hole is formed in the plunger pump body; and a second oil supply hole and an oil return hole for returning oil of a machine head are formed in the blade pump body. The effect of the sewing machine is equivalent to simultaneous oil supply of a plunger pump and a blade pump, requirements for high-speed and low-speed oil supply can be met simultaneously; and under the conditions of low rotating speed or intermittent movement, it can be ensured that jamming of the sewingmachine due to the fact of oil is not supplied is avoided.

Description

Technical field: [0001] The invention belongs to the technical field of sewing equipment, in particular to a sewing machine which can meet the oil supply demand of the machine under the condition of low speed or intermittent movement. Background technique: [0002] At present, during the use of the lockstitch sewing machine, there will be a process of sewing short pieces. At this time, the sewing machine is in a working state where the single sewing time is short and the number of operations per unit time is large. A state of intermittent oil supply. In addition, some sewing processes will cause the sewing machine to work at a low speed for a long time, and the sewing machine will also be in a state of low speed oil supply at this time. [0003] At present, the oil pump used in sewing machines is generally a vane pump. Due to the sealing structure between the vane and the oil pump cover and the supporting plate, when the oil pump stops working, the lubrication will flow out...

AI Technical Summary

Problems solved by technology

Therefore, the amount of oil supply can meet the requirements of use during normal sewing, but when the sewing machine performs individual sewing processes, it may cause the sewing machine to be in intermittent oil supply, low-speed oil supply or some other oil supply conditions, resulting in oil pump supply. Insufficient oil keeps the machine in an oil-free state for a long time, causing the machine to wear out and get stuck, affecting product quality and life

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