Wheel bearing with sensor

摘要

A sensor equipped wheel support bearing assembly having good assemblability with a compact structure and capable of accurately detecting load acting on a bearing of a vehicle wheel is provided. One of an outer member and an inner member that serves as a stationary member has a vehicle body fitting flange to be fitted to a knuckle. One or more load detecting sensor unit is provided on the stationary member and includes a strain generating member having two or more contact fixing segments fixed to the stationary member, and one or more sensors fitted to the strain generating member for detecting a strain occurring in the strain generating member. A circuit fixing stay is provided on a side face of the vehicle body fitting flange and a calculation processing circuit is fitted to this stay for calculating and processing an output signal of the sensor.

主权项

1. A wheel support bearing assembly for rotatably supporting a vehicle wheel relative to an automotive vehicle body, which bearing assembly comprising:
an outer member having an inner periphery formed with a plurality of rows of rolling surfaces; an inner member having an outer periphery formed with rolling surfaces that are held in face to face relation with the rolling surfaces of the outer member, one of the outer member and the inner member being a stationary member; a plurality of rows of rolling elements interposed between the rolling surfaces in the outer and inner members that are held in face to face relation with each other; a vehicle body fitting flange fitted to a knuckle, the vehicle body fitting flange being provided on and extending away from an outer periphery of the one of the outer and inner members that is the stationary member; one or more sensor units for detecting a load provided on an outer diametric surface of the stationary member, each of the load detecting sensor units including a strain generating member, having two or more contact fixing segments that are to be fixed to the stationary member in contact therewith, and also including one or more sensors fitted to the strain generating member for detecting a strain occurring in the strain generating member; a calculation processing circuit for calculating and processing an output signal of the sensor, the calculation processing circuit being fitted to a side face of the vehicle body fitting flange through a circuit fixing stay or fitted directly to the side face of the vehicle body fitting flange, the calculation processing circuit being mounted on an arcuate circuit substrate.