| 摘要 |
<p>In a coupling structure for coupling a middle shaft (12) that may function as a first rotary member to an input shaft (13) that may function as a second rotary member such that torque is transmittable therebetween, a snap ring (26) is engaged with both a first engagement groove (24) of a cylindrical member (18) and a second engagement groove (25) of a shaft portion (21) to restrict axial movement of the input shaft (13) relative to the middle shaft (12). The first and second engagement grooves (24, 25) are formed such that the snap ring (26) is disengaged from the first engagement groove (24) when a load higher than or equal to a predetermined load is applied to the middle shaft (12) and the input shaft (13) in the separating direction. There is provided a separation nut (42) that is fitted to a threaded portion formed on the shaft portion (21) and that rotates and moves toward middle shaft (12) to push the middle shaft (12).</p> |
