Disk-rotating motor and disk-driving device
View Patent ↗A disk-rotating motor includes a rotor section including a rotor magnet attached to a rotor frame and a shaft fixed to a center of the rotor frame, and a stator section including a shaft-bearing which bears the shaft, wherein the stator section includes the shaft-bearing, a shaft-bearing housing which holds the shaft-bearing, a thrust plate which bears the shaft in an axis direction, a stator core which is arranged to face the rotor magnet and provided with wire-winding, a core holder which holds the stator core, and a bracket which holds the shaft-bearing housing. The bracket has a projecting part which fixes the shaft-bearing at a central part thereof, an inner diameter part of the shaft-bearing is press-fitted to be tightened to the projecting part, and an outer diameter part of the shaft-bearing housing is adhered to be tightened to an inner diameter part of the core holder.
1. A disk-rotating motor comprising:
a rotor section including a rotor magnet attached to a rotor frame and a shaft fixed to a center of the rotor frame; and
a stator section including a shaft-bearing which bears the shaft,
wherein the stator section includes the shaft-bearing, a shaft-bearing housing which holds the shaft-bearing, a thrust plate which bears the shaft in an axis direction, a stator core which is arranged to face the rotor magnet and provided with wire-winding, a core holder which holds the stator core, and a bracket which holds the shaft-bearing housing, and
wherein the bracket is formed with a projecting part which fixes the shaft-bearing at a central part thereof, an inner diameter part of the shaft-bearing is press-fitted to be tightened to the projecting part, and an outer diameter part of the shaft-bearing housing is adhered to be tightened to an inner diameter part of the core holder.
2. The disk-rotating motor according to claim 1 ,
wherein a notch is formed at an outer periphery of the projecting part formed at the central part of the bracket.
3. The disk-rotating motor according to claim 1 ,
wherein a bracket contact surface of the shaft-bearing is formed with a groove.
4. The disk-rotating motor according to claim 1 ,
wherein a bracket-side end part of the shaft-bearing housing has a substantial L-shaped axial cross-section, and
wherein a width of a gap formed between an inner diameter part of an L-shaped part having the L shape and an outer diameter part of the shaft-bearing is smaller than a width of a gap formed between a bracket-side end face of the L-shaped part and a shaft-bearing side face of the bracket facing thereto.
5. A disk-driving device including the disk-rotating motor according to claim 1 mounted thereto.