Electromagnetic dog clutch

An electromagnetic dog clutch, comprising a movable gear sleeve and a fixed toothed sleeve that are engaged to transmit power, the movable gear sleeve is provided with contrate transmission teeth, and the fixed toothed sleeve is correspondingly provided with contrate tooth spaces, wherein

• the contrate transmission teeth have a uniform thickness in a direction of tooth length, the contrate tooth spaces that engage with the contrate transmission teeth have a sector-shape in a direction of tooth space length, and the width of two sides of the contrate tooth spaces gradually increases outwardly along the radial direction of the fixed toothed sleeve and gradually decreases inwardly along the radial direction of the fixed toothed sleeve;
• the movable gear sleeve has a center hole, a power output shaft cross the center hole, so the movable gear sleeve is nested on the power output shaft, the movable gear sleeve transmit power to the output shaft through a spline group, and the movable gear sleeve reciprocating moves on the spline group in an axis direction of the power output shaft;
• at two ends of the spline group, a centering sleeve is provided between the movable gear sleeve and the power output shaft;
• the centering sleeve is made of copper alloy material, has a rectangular cross-section, is positioned with respect to the movable gear sleeve with an interference fit, is clearance fitted with the power output shaft, and supports the movable gear sleeve to slide on the power output shaft.