| 摘要 |
PURPOSE:To absorb the vibration enough which occurs in an inner rotor-type DC brushless motor by a rotor itself. CONSTITUTION:In a rotor of an inner rotor-type DC brushless motor, a cushioning material 3 having an uneven outer shape and an uneven inner shape which correspond to an uneven inner shape of an external core 1 and an uneven outer shape of an internal core respectively is located between the external core 1 and the internal core 2. In the cushioning material 3, at least one space 3A is provided so that a part of the cushioning material 3 may not be tightly adhered to the external core 1 or the internal core 2. Or, the cushioning material 3 is so installed between the external core 1 and the internal core 2 that almost all the parts of the cushioning material 3 may be tightly adhered to the external core 1 and the internal core 2 and at least one space is provided in the cushioning material 3 so that a part of the cushioning material 3 may not be tightly attached to both the external core 1 and the internal core 2. |
