Rotor assembly and motor device

The utility model discloses a rotor assembly and a motor device, the motor device comprises the rotor assembly, the rotor assembly comprises a rotor housing, and a mounting cavity is arranged in the rotor housing; the first rotor iron core is located in the mounting cavity, and a first mounting hole and a second mounting hole are formed in the first rotor iron core; the second rotor iron core is nested and mounted in the first mounting hole, a third mounting hole is formed in the second rotor iron core, and the third mounting hole and the second mounting hole are concentrically arranged; and the rotating shaft at least partially penetrates through the second mounting hole and the third mounting hole in the axis direction of the rotor shell. According to the design, the structure installation stability can be improved, and the cost can be reduced. 本实用新型公开一种转子组件及电机装置，电机装置包括上述的转子组件，转子组件包括转子外壳，转子外壳内设有安装腔；第一转子铁芯，第一转子铁芯位于安装腔内，第一转子铁芯开设有第一安装孔和第二安装孔；第二转子铁芯，第二转子铁芯嵌套安装在第一安装孔内，第二转子铁芯开设有第三安装孔，第三安装孔与第二安装孔同心设置；转动轴，转动轴沿着转子外壳