(Axial Tension Compression,shear) (3)键块联接Keyed connection)(④销轴联接Pinned connectio) 齿轮(gear) 键(key) 轴(shaft)m 轴(shaft) 键(key) 齿轮(gear) (3) 键块联接(Keyed connection) (4) 销轴联接(Pinned connection) (Axial Tension & Compression，shear) F F A B t d t1 t1