| 摘要 |
PROBLEM TO BE SOLVED: To provide a hub for a power transmission device, in which an elastic member is filled in a hub side engagement part with sufficient pressure in insert molding and sufficient strength is given to the hub side engagement part, and to provide its manufacturing method. SOLUTION: The hub 57 for a power transmission device comprises: an inner hub 59 made of a rigid body; a cylinder part 61 comprising an elastic body annularly formed to an outer peripheral side of the inner hub 59; an outer ring 63 made of a rigid body fixed to an outer circumferential side of the cylinder part 61 and formed projected to an axially rear side; a hub side recess/projection part 65 formed to an outer circumferential face on the axially rear side of the outer ring 63 and made of an elastic body engaged with a pulley side engagement part. In the hub 57 for a power transmission device, a communication part 81 made of an elastic body and connecting a front side end part of the outer ring 63 and the hub side recess/projection part 65 is formed on a front side in which the hub side recess/projection part 65 is not formed in the outer circumference of the outer ring 63. COPYRIGHT: (C)2009,JPO&INPIT
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