Spindle-cleaning oiling machine

The utility model relates to a spindle-cleaning oiling machine, which comprises a cleaning oil injector, a negative pressure source, a filter device and an oil tank. The cleaning oil injector is provided with a sleeve and a piston. An oil inlet hole and an oil return hole are formed in the middle of the sleeve. A countersink is formed in the lower end of the piston. A first circular groove and a second circular groove are formed on the outer side of the piston and communicated with the countersink. An oil injecting tube is communicated with the first circular groove. The lower end of the piston is coupled with a connector. A check gasket is arranged between the connector and the piston. A sealing ring is installed at the lower end opening of the connector. The filter device is provided with a box body. An oil inlet tube is arranged on the box cover covering the upper end opening of the box body in a penetrating manner. A dividing member close to the upper opening is arranged in the box body and is provided wi