Motor vibration device and eccentric stack of laminations thereof

The utility model provides an eccentric stack of laminations and use the motor vibration device of this off -centre stack of laminations, eccentric stack of laminations includes the eccentric piece of a plurality of superpose, every eccentric piece including be used for the cover establish an axis of rotation connecting portion and with the eccentric portion that connecting portion are connected, connecting portion are equipped with the through -hole and are used for installing the axis of rotation, eccentric is assembled the arch through formation and connects with assembling the mutual gomphosis of recess, off -centre portion roughly is fan -shapedly, sectorial central angle is between 150 to 180. Implement the utility model discloses can show the cost that reduces the motor vibration device. 本实用新型提供种偏心叠片组及使用该偏心叠片组的电机振动装置，所述偏心叠片组包括若干叠置的偏心片，每个偏心片包括用于套设到转动轴的连接部以及与所述连接部连接的偏心部，所述连接部设有通孔用于安装到所述转动轴，所述偏心片通过形成装配凸起和装配凹槽并相互嵌合而连接，所述偏心部大致呈扇形，所述扇形的圆心角在150°至180°之间。实施本实用新型能显著降低电机振动装置的成本。