US 9,812,914 B2
Rotor component member, rotating axis, rotor, motor, and machine tool
Kenji Kawai, Yamanashi (JP); Shinobu Takano, Yamanashi (JP); and Yohei Arimatsu, Yamanashi (JP)
Assigned to FANUC CORPORATION, Yamanashi (JP)
Filed by FANUC CORPORATION, Yamanashi (JP)
Filed on Nov. 12, 2015, as Appl. No. 14/939,377.
Claims priority of application No. 2014-234734 (JP), filed on Nov. 19, 2014.
Prior Publication US 2016/0141931 A1, May 19, 2016
Int. Cl. H02K 1/27 (2006.01); H02K 1/30 (2006.01); H02K 15/03 (2006.01)
CPC H02K 1/30 (2013.01) [H02K 1/278 (2013.01); H02K 15/03 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A rotor comprising:
a rotating axis rotating about an axial center of the rotating axis and including a tapered surface in an outer circumferential surface of the rotating axis; and
a rotor component member fitted on the rotating axis using the tapered surface of the rotating axis, wherein the rotor component member comprises:
a sleeve which has an inner circumferential surface including a tapered surface to be press-fitted relative to the tapered surface of the outer circumferential surface of the rotating axis; and
a rotor component mounted on an outer circumferential surface of the sleeve,
at least one of the tapered surface of the rotating axis and the tapered surface of the rotor component member has a corrugated surface structure created by chemical oxidation along the tapered surface, the corrugated surface stores a lubricant and the corrugated surface wears away when press-fitting the rotating axis relative to the rotor component member.