Fluid dynamic pressure bearing for small flat motor, small flat motor, fan motor, and forced air feed type air cell
OwnerHisafumi Yasudainventor
Life of this patent
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Abstract
This invention has a stator 10 having a coil 10a wound on a core 10b, a rotor 11 having a yoke 11b that holds a magnet 11a facing the core 10a, in which an impeller 12 is attached to the rotor 10 that is supported by a hydraulic bearing 13 having a fluid sump 13f that communicates with the thrust receiver 13a of a bearing housing 13b and a fluid receiver groove 13c, and that is formed around the outer periphery of a hydraulic sleeve 13d fitted within the inner cylinder of the bearing housing 13b.
Claims10
A hydraulic bearing for a small, flat motor that has a cylindrical bearing housing with a thrust receiver inside at the bottom;
- a dynamic pressure sleeve that has a bearing hole that supports the rotor shaft of the motor and that is fitted and fixed within the bearing housing;
- and a fluid receiver groove in the inner surface of the bearing hole accommodates fluid that flows around the rotor shaft from the thrust receiver of the bearing housing,
- in which a number of partition walls that contact the inner surface of the bearing hole, separating cutout spaces that extend downward from the top surface that covers the openings between adjoining partition walls, form a fluid sump around the outer surface of the dynamic pressure sleeve that is fitted inside the cylinder of the bearing housing, such that the dynamic pressure sleeve is fitted and fixed inside the cylinder of the bearing housing with a gap maintained between the thrust receiver of the bearing housing and the lower and inward portions of the cutout spaces.
A small, flat motor of this invention that has a stator with a coil wound on a core, and a rotor with a magnet that faces the core held by a yoke,
- in which the core has an insulating coating applied by resin molding that covers both sides of the reel for winding the coil, and the stator is assembled with the coil wound on the reel of the core with the insulating material intervening between the coil and core.
A small, flat motor with a stator having a coil wound on a core, a rotor having a yoke that holds a magnet facing the core, and a circuit board that makes a continuous circuit with the coil of the rotor and that has certain electronic components mounted on its back,
- in which there are openings in the mounting substrate corresponding to the positions where the electronic components are mounted, which openings accommodate the electronic components mounted on the back of the circuit board, and in which an adhesive resin is packed into the openings of the mounting substrate for resin molding of the electronic components.
A fan motor that has a stator having a coil wound on a core, a rotor having a yoke that holds a magnet facing the core, and an impeller,
- in which there is a cylindrical bearing housing with a thrust receiver inside at the bottom, a dynamic pressure sleeve that has a bearing hole that supports the rotor shaft of the motor and that is fitted and fixed within the bearing housing, and a fluid receiver groove in the inner surface of the bearing hole accommodates fluid that flows around the rotor shaft from the thrust receiver of the bearing housing, with a number of partition walls that contact the inner surface of the bearing hole that separate cutout spaces that extend downward from the top surface that covers the openings between adjoining partition walls, and form a fluid sump around the outer surface of the dynamic pressure sleeve that is fitted inside the cylinder of the bearing housing, such that the dynamic pressure sleeve is fitted and fixed inside the cylinder of the bearing housing with a gap maintained between the thrust receiver of the bearing housing and the lower and inward portions of the cutout spaces.
Dependencies are inferred from the claim text.