The present invention provides a rolling bearing unit for supporting wheel that is able to suppress increase in the dimension in the axial direction due to the installation of a generator and a wireless communication apparatus to a minimum, supply sufficient electric power to a sensor attached to a wheel, and wirelessly transmit output signals of the sensor to an electronic apparatus on the vehicle body. The hub 17 comprises an inner recessed portion 29 on the inner diameter side of the inside portion in the axial direction which has a cylindrical fitting surface section 30 on the inner peripheral surface and is coaxial with the center axis of the hub 17, and a supporting member 67 is supported by and fastened to the inside of the inner recessed portion in a state where the hollow cylindrical supporting member 67 fits the cylindrical guide surface section 70 that is provided in the outer peripheral surface to the fitting surface section 30. A rotor 6 which is an armature is fixed to the inside portion in the axial direction of the supporting member 67 to be coaxial with the supporting member 67, and the wireless communication apparatus 12 is placed inside in the radial direction of the supporting member 67. A through-hole 34 where a wiring 57 is placed opens in the bottom surface 31 of the inner recessed portion 29.
ROLLING BEARING UNIT FOR SUPPORTING VEHICLE WHEEL
2020-03-05
Patent
Elektronische Ressource
Englisch