SENSOR-EQUIPPED BEARING FOR WHEEL

摘要

A sensor-equipped bearing for a wheel for sensing the load on a wheel with high accuracy without being influenced by hysteresis.The bearing for a wheel comprises an outer member (1) where two rolling contact surfaces (3) are formed on the inner circumference, an inner member (2) where two rolling contact surfaces (4) opposed to the rolling contact surfaces (3) are formed, and double-row rolling elements (5) interposed between the opposed rolling contact surfaces (3, 4) of both members. On the outer diametrical surface of the fixing member out of the inner and outer members (2, 1), a sensor unit (19) is provided. The sensor unit (19) has a strain generating member (20) composed of two contact fixed parts (20a, 20b) in contact with the outer diametrical surface of the fixing member and fixed and a sensor (21) attached to the strain generating member and adapted for sensing the strain of the strain generating member. The two contact fixed parts (20a, 20b) are disposed in the positions of the same phase in the circumferential direction of the fixing member.