ROTATING DEVICE

摘要

A rotating device comprises: a hub on which magnetic recording disks are to be mounted; a shaft which extends along a rotational axis of the hub; a shaft surrounding member which surrounds one end of the shaft so as to rotatably support the shaft; and a base which fixedly supports the shaft surrounding member. A lubricant agent is interposed between the shaft and the shaft surrounding member. A radial gap between the shaft and the shaft surrounding member includes radial dynamic pressure generating portions which generate a dynamic pressure applied to the lubricant agent in a radial direction when the shaft is rotated with respect to the shaft surrounding member. A hub fixation screw hole is provided to the other end face of the shaft along the rotational axis. The hub is fixed to the shaft by coupling a hub fixation screw with the hub fixation screw hole.

主权项

1. A rotating device comprising:
a hub on which a magnetic recording disk is to be mounted; a shaft configured to extend along a rotational axis of the hub; a shaft surrounding member configured to surround one end side of the shaft, and configured to rotatably support the shaft; and a base configured to fixedly support the shaft surrounding member, wherein a lubricant agent is interposed between the shaft and the shaft surrounding member, and wherein a gap between the shaft and the shaft surrounding member comprises a radial dynamic pressure generating portion configured to generate a dynamic pressure applied to the lubricant agent in a radial direction when the shaft is rotated with respect to the shaft surrounding member, and wherein a fastener hole is provided to the other end face of the shaft along the rotational axis, and wherein the hub is fixed to the shaft by coupling a fastener with the fastener hole.