Vehicle wheel driving apparatus and electric motor

In a rolling bearing 21, a plurality of balls (rolling elements) 124 are arranged in an annular fashion, the balls 124 so arranged are held by inner and outer bearing rings 121, 122, some of the plurality of balls 124 are arranged along a pitch circle having a primary pitch circle diameter D1 so as...

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Bibliographische Detailangaben
1. Verfasser:	KOMATSU MICHIHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES AUXILIARY DRIVES FOR VEHICLES CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DYNAMO-ELECTRIC MACHINES ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ELECTRICITY ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GENERATION INSTRUMENTATION OR DASHBOARDS FOR VEHICLES MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES PERFORMING OPERATIONS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	In a rolling bearing 21, a plurality of balls (rolling elements) 124 are arranged in an annular fashion, the balls 124 so arranged are held by inner and outer bearing rings 121, 122, some of the plurality of balls 124 are arranged along a pitch circle having a primary pitch circle diameter D1 so as to form a primary ball row 127, while the remaining of the plurality of balls are arranged along a pitch circle having a secondary pitch circle diameter D2 so as to form a secondary ball row 128, and the secondary pitch circle diameter D2 is made larger than the primary pitch circle diameter D1. The secondary ball row 128 is disposed radially outwards of the primary ball row 127 in such a manner as to overlap thereabove.