| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing for wheel with sensor where a sensor for load detection is compactly installed on a vehicle, various loads on a wheel can be detected with proper sensitivity, its output is utilized effectively for vehicle control of a motor vehicle, and the cost at mass production is low. SOLUTION: A strain sensor 21 is attached to an outer member 1, where rolling-body rolling surfaces of a plurality of rows are formed on an inner circumference of the outer member. The strain sensor 21 comprises a ring-shaped strain generating member 22 which is concentric with the outer member 1 and a plurality of sensor elements 23 attached to the strain generation member 22. The strain generating member 22 includes contact fixing surfaces 22a, 22b at a plurality of spots fixed, with respect to the outer member 1. The first contact fixing surface 22a is fixed to a side surface of a flange 1a, provided to the outer member 1 and attached to a vehicle body, and the second contact fixing surface 22b is fixed to the outer circumferential surface of the outer member 1. An estimation means 31 is provided which estimates the amount of preload of the bearing for wheel or action force between a tire and a road surface by the outputs of the sensor elements 23. COPYRIGHT: (C)2009,JPO&INPIT
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