Maintenance-free device for spindle of spinning machine

The utility model provides a maintenance-free device for a spindle of a spinning machine, which belongs to the technical field of textile equipment and is characterized by comprising a protective sleeve, a spindle blade is sleeved in the protective sleeve, an adsorption filter is arranged on the spindle blade, a sealing ring is arranged at the top of the adsorption filter, a positioning shaft is arranged at the bottom of the spindle blade, and a spindle sleeve is arranged at the bottom of the positioning shaft. A buffer seat is fixedly arranged at the top of the positioning shaft, a set of buffer springs are arranged in the buffer seat, an oil pumping pipe is arranged between the buffer seat and the adsorption filter, a first oil storage tank is formed in the left side of the oil pumping pipe, a second oil storage tank is formed in the right side of the oil pumping pipe, and electrostatic dust collectors are further arranged on the outer walls of the left side and the right side of the protective sleeve. The