High-speed high-precision main shaft mechanism for machining center machine

A high-speed high-precision main shaft mechanism for a machining center machine comprises a main shaft, a built-in motor, an eccentric compensation assembly and a spiral cooling sleeve. A front bearing set and a rear bearing set are arranged on the outer circle of the front end and the outer circle of the rear end of the main shaft respectively, and the built-in motor is installed between the front bearing set and the rear bearing set. The built-in motor is an asynchronous motor and is composed of a rotor, a stator and a machine shell from inside to outside, and the rotor is assembled on the main shaft in a hot pressing mode. The high-speed and high-precision main shaft mechanism for the machining center machine is reasonable in structural design, the eccentricity of the main shaft is recognized and compensated through the eccentricity compensation assembly, the rotation precision of the main shaft is prevented from being affected by eccentricity, and the rotation precision of the main shaft is improved by ar