To provide a bearing unit with a wireless sensor, capable of easily attaching and detaching a sensor onto a bearing without being disturbed by wiring, because of the synergistic effect between a detachable sensor unit attaching means and turning wireless.
This bearing unit is provided with the bearing 1 having a fixed side wheel 3 and a rotation-side wheel 2, the sensor unit 9, and the sensor unit attaching means for attaching detachably the sensor unit 9 onto the fixed side wheel 3 of the bearing 1. The sensor unit 9 is integrated with a sensor part 26 for detecting a detection object, a signal transmission circuit 29b and a transmission antenna 29a. The sensor unit 9 has an electric power source 27, requiring no wiring to an outside, for example, an electric power receiving part 28 for receiving electric power in a wireless manner, a battery or a power generation means.
OKADA KOICHI
MIZUTANI MASATOSHI
Shuji Sugimoto
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