| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a wheel bearing with an electric power transmission device capable of supplying electric power in a non-contact state between a rotating side and a fixed side, supplying electric power when rotation is stopped, and using the electric power supplied to the rotating side as various power sources for sensors. <P>SOLUTION: Double row rolling elements 5 are interposed between an outer member 1 being a fixed ring and an inner member 2 being a rotating ring. An electric power transmission device 21 for transmitting electric power in a non-contact state between the outer member 1 and the inner member 2 is provided. Connectors 31, 32 connected to the electric power transmission device 21 is provided to at least one of the fixed ring and the rotating ring. The electric power transmission device 21 includes, for example, a primary coil 22 installed in the fixed ring, and a secondary coil 24 installed in the rotating ring, and transmits electric power by electromagnetic induction by applying AC currents. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
