Load detecting device for roller bearing and roller bearing apparatus

摘要

A load detecting device for a roller bearing (10) includes: a strain gauge (32) that is provided in a roller (14A) arranged rollably between a first bearing ring (13) and a second bearing ring (14) and that detects a load applied to the roller; a position detecting sensor (33) that detects a rotation position of the roller in a revolution direction of the roller; and a data logger (36) that is provided for the roller and that records and stores a detection signal from the strain gauge.