Disk spindle motor

Details Disk spindle motor Disk spindle motor

H - Electricity

02

K

H02K 7/09 (2006.01) F16C 17/26 (2006.01) F16C 33/10 (2006.01) G11B 19/20 (2006.01) G11B 25/04 (2006.01) H02K 5/167 (2006.01)

Patent

CA 2124348

A disk spindle motor (200) having a permanent magnet central shaft (202). A pair of annular, non-magnetic combination thrust and journal bearings (204A, 204B) having truncated-conical outer surfaces (204') are spaced apart on the shaft (202). The bearings coact with complementary surfaces (210, 211) on the hub (209) of a motor rotor (208). Shaft end caps (206A, 206B) connect the shaft to base means (218) and have radially extending shoulders (206") which define annular gaps (225', 225") with the rotor and function as ferrofluidic seals.

Moteur (200) d'axe de disque, ayant un arbre central fixe (202) constitué d'un aimant permanent. Une paire de paliers annulaires lisses de butée non magnétiques espacés (204A, 204B) à surfaces extérieures coniques tronquées (204') est montée sur l'arbre (202). Les paliers interagissent avec les surfaces complémentaires (210, 211) du moyeu (209) du rotor (208) de moteur. Des flasques (206A, 206B) assurent le raccordement de l'arbre à la base (218), ont un épaulement radial (206") qui définit l'entrefer annulaire (225', 225") et servent de joints de ferrofluide.

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