Nidec Corporation

Tatsuya Tatara

Hitoshi Takaki

Yusuke Iwai

Satoru Kuramoto

Shigeo Hayashi

Atsushi Inoue

Hidehiko Hidaka

Harushige Osawa

Hiroyuki Ichizaki

Kazuya Ichimura

Akihiro Nakagawa

Ryosuke Hayamitsu

Kazuhiro Inouchi

Junya Matsuyama

Hiroaki Inamori

A fan device includes an impeller rotating around a central axis and a motor disposed farther downward than the impeller. The impeller includes a base unit enlarged downward and plural blades disposed on a peripheral surface of the base unit. Upper portions of the blades are positioned at a leading end of a rotating direction with respect to lower portions. In an outer end portion on a front surface of each blade at the leading end of the rotating direction, a radial-direction component of a normal unit vector of an upper end portion of the blade is smaller than that of a lower end portion, assuming that an outer peripheral side of the blade is a positive direction. A thickness of a root of the lower end portion is larger than that of the upper end portion.

Fan device and vacuum cleaner including the same

An axial fan includes a rotor portion, a stator portion arranged radially opposite to the rotor portion, and an impeller hub fixed to the rotor portion, and arranged to be capable of rotating integrally with the rotor portion. The impeller hub includes a hub top plate portion; a hub tubular portion being tubular, and arranged to extend axially downward from an outer edge of the hub top plate portion; a plurality of blades arranged in a circumferential direction; a plurality of wall portions arranged in the circumferential direction radially inside of the hub tubular portion; and a joining portion arranged to join a corresponding one of the wall portions to the hub tubular portion. A radially outer surface of the rotor tubular portion is arranged to be in contact with an inner surface of at least one of the wall portions.

Axial fan

A storage disk drive motorincludes a stator unit, a rotor unit, a shaftarranged in a coaxial relationship with a center axis, a sleeve unitincluding a flange portion, and a base member, having a through-hole, fixed to the sleeve unitby caulking. The flange portionincludes a flange lower surfacemaking contact with an upper surfaceof the base memberand a jutprotruding downwards from a radial inner side of the flange lower surface. The jutincludes a first outer circumferential surfaceopposed to the inner circumferential surfaceof the base member, a second outer circumferential surfacepositioned below the first outer circumferential surface, and a grooveradially inwardly indented from the first outer circumferential surfaceand the second outer circumferential surface

Method for manufacturing a storage disk drive motor, motor for driving a storage disk and storage disk drive apparatus provided with the motor

A motor includes a bearing mechanism, a stationary unit including a stator arranged radially outwards of the bearing mechanism, and a rotary unit supported by the bearing mechanism at the upper side of the stationary unit for rotation about a center axis with respect to the stationary unit. The rotary unit includes a substantially cylindrical closed-top rotor yoke having a cover portion arranged to cover the stator. The bearing mechanism includes a substantially cylindrical closed-bottom bush formed by a press work, a sleeve fixed inside the bush and provided with an upper portion protruding beyond the bush and a shaft inserted into the sleeve. An upper end of the bush is lower than or flush with an upper end of the stator in a direction parallel to the center axis.

Motor and storage disk drive apparatus

A motor includes a stationary unit, a bearing mechanism, a rotary unit, and a chucking device. The rotary unit includes a rotor yoke provided with a cover portion extending around the chucking device and designed to allow the storage disk to be directly or indirectly mounted thereto and a removal-preventing member fixed to the cover portion to prevent removal of the rotary unit from the stationary unit. The removal-preventing member made of metal. The removal-preventing member includes a removal-preventing portion, an upper fixing portion having a plurality of upper protrusions inserted into the through-holes of the cover portion and bent toward the upper surface of the cover portion, and a lower fixing portion making direct or indirect contact with the lower surface of the cover portion and cooperating with the upper fixing portion to fix the position of the removal-preventing portion in a direction parallel to the center axis.

Motor, storage disk drive apparatus and motor manufacturing method

In a motor including a chucking device for detachably holding a disk, the chucking device has a center case to which a central opening of the disk is inserted; resilient members received within the center case; and claw members for holding the disk in place. Each of the claw members has a tip end portion, a disk holding surface positioned axially below the tip end portion for holding the disk in place, and a recessed sliding portion formed substantially at a circumferential center region of the disk holding surface, the sliding portion serving to guide movement of the claw member. Rest portions are formed in the center case in a facing relationship with the respective sliding portions, the rest portions serving to support the respective sliding portions by contacting therewith. Each of the rest portions has an upwardly convex curved surface with which the corresponding sliding portion makes contact.

Motor with a chucking device for detachably holding a disk and disk drive apparatus equipped with the same

In a motor including a chucking device for detachably holding a disk, the chucking device has a center case to which a central opening of the disk is inserted; resilient members received within the center case; and claw members for holding the disk in place. Each of the claw members has a claw portion having a disk holding surface for holding the disk in place and a pair of wing portions extending radially inwardly from the claw portion. Further, each of the wing portions has a spherical contact surface contacting with a underlying part arranged axially below the wing portions.

Motor with a chucking device for detachably holding a disk having a central opening portion and disk drive apparatus equipped with the same

In a motor including a chucking device for detachably holding a disk, the chucking device has a center case to which a central opening of the disk is inserted; resilient members received within the center case; and claw members for holding the disk in place. Each of the claw members has a tip end portion, a disk holding surface positioned axially below the tip end portion for holding the disk in place, and a recessed sliding portion formed substantially at a circumferential center region of the disk holding surface, the sliding portion serving to guide movement of the claw member. Rest portions are formed in the center case to face the respective sliding portions, the rest portions serving to support the respective sliding portions by contacting therewith. The sliding portions are designed to make contact with the respective rest portions when the disk is mounted to the chucking device.

Growing community of inventors

Kyoto, Japan

Tatsuya Tatara