Oil-cooled rotor assembly and oil-cooled motor

The utility model relates to the technical field of motors, and discloses an oil-cooled rotor assembly and an oil-cooled motor, cooling oil in an axial oil duct enters a first lightening hole through a first oil throwing hole and a first oil duct, and the cooling oil flows in the first lightening hole to cool a rotor core; meanwhile, the lubricating oil in the first lightening holes flows to the two axial ends of the rotor core and enters the cooling oil cavities respectively, and then the lubricating oil in the cooling oil cavities enters the magnetic steel grooves in the rotor core to cool the magnetic steel in the magnetic steel grooves, so that the rotor core and the magnetic steel are directly cooled by using the cooling oil, and the service life of the rotor core is prolonged. The contact area between the cooling oil and the magnetic steel and the rotor core is large, the cooling effect on the rotor core and the magnetic steel is good, the attenuation probability of the motor torque and the demagnetizat