JP2006211795A5 - - Google Patents

Claims (9)

A shaft that rotates the hub integrally inserted into the bearing hole of the bearing sleeve, a spindle motor for filling the lubricating fluid between the inner peripheral surface of the bearing hole and the outer peripheral surface of the shaft, on the inner bottom surface of the hub a spindle motor to open along the hub circumferential direction, characterized in that a recess for holding the lubricating fluid scattered from the bearing hole was formed in the radially outward position than the bearing hole. A shaft that rotates the hub integrally inserted into the bearing hole of the bearing sleeve, a spindle motor for filling the lubricating fluid between the inner peripheral surface of the bearing hole and the outer peripheral surface of said shaft, said an inner surface of the hub forming an inner wall surrounding an outer periphery of the bearing sleeve, open along the hub axis to the inner wall of the hub, a recess for holding the lubricating fluid scattered from the bearing hole, radially outward position than the bearing hole A spindle motor characterized by that. A spindle motor in which a shaft is inserted into a bearing hole of a bearing sleeve that rotates integrally with a hub, and a lubricating fluid is filled between an outer peripheral surface of the shaft and an inner peripheral surface of the bearing hole, and the inner bottom surface of the hub A spindle motor characterized in that a recess that opens along the circumferential direction of the hub and holds the lubricating fluid scattered from the bearing hole is formed at a position radially outward from the bearing hole . A spindle motor in which a shaft is inserted into a bearing hole of a bearing sleeve that rotates integrally with a hub, and a lubricating fluid is filled between an outer peripheral surface of the shaft and an inner peripheral surface of the bearing hole. An inner wall that surrounds the outer periphery of the bearing sleeve is formed, and a recess is formed on the inner wall of the hub along the axial direction of the hub so as to hold the lubricating fluid scattered from the bearing hole at a position radially outward from the bearing hole. A spindle motor characterized by that . 5. The recess according to claim 1, wherein the recess opens with an intersection line between the inner bottom surface of the hub and the wall surface of the inner wall as an opening edge or includes the intersection line. Spindle motor as described in 6. The spindle motor according to claim 1, wherein the concave portion has a shape that gradually narrows from the opening side to the back end side . The spindle motor according to claim 6 , wherein a holding space for the lubricating fluid scattered from the bearing hole is further formed at the back end of the recess . The spindle motor according to claim 6, wherein the back end of the recess is formed in an arc shape. The inner wall of the hub surrounds the outer periphery of the open end of the bearing sleeve, the inner bottom surface of the hub faces the open end of the bearing sleeve, and a gap between the wall surface of the inner wall of the hub and the outer peripheral surface of the bearing sleeve The spindle motor according to any one of claims 1 to 2 and 5 to 8, wherein a seal structure is formed by forming a bottleneck.