High-speed nut rotating feeding lead screw device

A high-speed nut rotation feed ball screw device, comprising:

• a ball screw;
• a ball screw nut;
• a bearing unit;
• and
• a driving unit, wherein
• the ball screw is fixed on a machine tool via a ball screw seat,
• the bearing unit includes an inner bearing fixing sleeve, an outer bearing fixing sleeve, and a bearing assembly, the outer bearing fixing sleeve is sleeved on the inner bearing fixing sleeve, a bearing installation space is formed between the outer bearing fixing sleeve and the inner bearing fixing sleeve, the bearing assembly is installed in the bearing installation space, one end of the inner bearing fixing sleeve is a ball screw nut connection end for fixedly connecting to one end of the ball screw nut, and another end of the inner bearing fixing sleeve is a driving unit connection end for fixedly connecting to the driving unit,
• the ball screw nut is arranged on the ball screw, and one end of the ball screw nut is fixedly connected to the ball screw nut connection end of the inner bearing fixing sleeve, and
• the driving unit includes a first pulley, a second pulley, a synchronous belt, and a driving motor, the first pulley is connected to the driving motor, the second pulley is sleeved on the ball screw and is fixedly connected to the driving unit connection end of the inner bearing fixing sleeve, and the first pulley and the second pulley are connected via the synchronous belt;
• wherein an oil injection channel communicating with the bearing seal ring is provided on the outer bearing fixing sleeve.