| 摘要 |
PROBLEM TO BE SOLVED: To provide a wheel bearing with a sensor allowing its load sensor to be compactly installed in a vehicle to accurately detect a load exerted on the wheel. SOLUTION: The wheel bearing 10 with the sensor includes a fixed wheel 1 with a double-row rolling face 4 formed thereon, a turning wheel 2 with a rolling face 5 formed opposite to the rolling face 4 of the fixed wheel 1, and double-row rolling element 3 interposed between the opposite-standing rolling faces 4 and 5. The fixed wheel 1 has a vehicle-body mounting flange 1a. This mounting flange 1a is provided with a plurality of bolt holes 9 with bolts screwed thereinto for mounting the fixed wheel 1 on a vehicle body while the wheel is rotatably supported on the vehicle body. An ultrasonic sensor 15 is installed on the fixed wheel 1 so as to front onto thread faces of a bolt 1 put through the bolt hole 9, the ultrasonic sensor 15 comprising at least one transmission part 16 and a reception part 17 for receiving an ultrasonic wave transmitted from the transmission part 16. Further, an estimation means 18 is provided for estimating an acting force acting between a tire and a road surface from the size or arrival time of the ultrasonic wave detected by the reception part 17 of the ultrasonic sensor 15. COPYRIGHT: (C)2008,JPO&INPIT
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