Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1994-04-11
1996-04-23
Budd, Mark O.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 42, 310 67R, H02K 516
Patent
active
055106617
ABSTRACT:
In a motor having a spindle (5) on which an inner race (8) of a ball bearing is mounted, an outer peripheral surface of an end of the spindle (5) has a knurled portion (16) on which is mounted the inner race (8) which is fixed to the spindle (5) through an adhesive (18) filled in a clearance between an inner surface of the inner race (8) and the knurled portion (16). An annular groove (19), formed in the spindle (5) in an area adjacent to the knurled portion (16), is also filled with the adhesive (18) to further fix the inner race (8) to the spindle (5), which improves the adhesive bond between the inner race (8) and the spindle (5). Even when the ball bearing is a miniature one having a thin-wall inner race (8), there is no fear of deformation of the inner race (8) when the adhesive (18) is cured, which improves the rotational accuracy of the rotor.
REFERENCES:
patent: 4204594 (1980-05-01), Banno
patent: 4741091 (1988-05-01), Settles
patent: 5128571 (1992-07-01), Itsu
patent: 5138209 (1992-08-01), Chuta et al.
patent: 5160866 (1992-11-01), Hishida et al.
patent: 5357160 (1994-10-01), Kaneda et al.
Daikuhara Yutaka
Yoshimura Noriyuki
Budd Mark O.
Minebea Kabushiki-Kaisha
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