TEMPERATURE DETECTOR

PROBLEM TO BE SOLVED: To provide a temperature detector capable of highly accurately and speedily detecting temperature rises in a lubricant at a rotating part in a rotation drive mechanism. SOLUTION: The temperature detector is constituted in such a way that a rotating shaft 1 may be rotatably supported at a bearing 2 with the external circumferential surface 11 of the rotating shaft 1 sliding and in contact with the internal circumferential surface 21 of the bearing 2. A lubricating oil 8 is filled in a slide contact surface between the external circumferential surface 11 of the rotating shaft 1 and the internal circumferential surface 21 of the bearing 2. A temperature detector 6 is arranged in a recession part 22 formed in the internal circumferential surface 21 of the bearing 2. The temperature detector 6 is provided with a sensor chip 61; a soft material 32 in which a communication path for temperature detection and for making part of the lubricating oil 8 flowing in the rotating direction A of the rotating shaft 1 flow to the downstream side of the sensor chip 61 from the upstream side of the sensor chip 61 via the sensor chip 61 is formed; and an operation part 10 for inputting the temperature of the lubricating oil 8 detected by the sensor chip 61 and determining whether abnormalities have occurred in the rotating shaft 1 or in the bearing 2 or not on the basis of the temperature. COPYRIGHT: (C)2005,JPO&NCIPI