| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power transmission device in which a hub and an elastic member are integrally formed, making a gate mark left after the integral formation so that distortion is hardly concentrated. <P>SOLUTION: In a pulley 1 driven by a belt, a resin-made pulley side projecting and recessed part 1a formed at a pocket 1b of the pulley 1 and a resin-made hub side projecting and recessed part 2a formed at an iron-made outer ring 2b of a hub 2 are engaged with each other at the pocket 1bd, thereby transmitting power from the pulley 1 to a rotary shaft 3. The hub side projecting and recessed part 2a constituting the hub 2, an outer ring 2b, an iron-made inner hub 2c fixed to the rotary shaft 3, and a resin-made cylindrical part 2b are integrally formed so that the gate mark 2f for injecting resin is formed in the vicinity of the outer ring 2b or on the outer periphery from the outer ring. <P>COPYRIGHT: (C)2008,JPO&INPIT |
