| 摘要 |
PROBLEM TO BE SOLVED: To increase force for preventing coming-off of a shaft when an impact or the like is applied, reduce the dimension in the axial direction and achieve miniaturization. SOLUTION: The bearing unit includes the shaft 31, a radial bearing 33 configured to support the shaft 31 in a circumferential direction, a thrust bearing 34 configured to support one end of the shaft 31 in a thrust direction, a housing 37 having the radial bearing 33 and the thrust bearing 34 disposed therein and having a closed structure except a shaft insertion hole into which the shaft 31 is fitted, a coming-off preventive member 46 provided on one end side of the radial bearing 33 where the thrust bearing 34 is arranged and configured to prevent the shaft 31 from coming off from the radial bearing 33, and viscous fluid 38 filled in the housing 37. The coming-off preventive member 46 is made of a resin material having a Young's modulus as much as 3.4 GPa or higher. COPYRIGHT: (C)2009,JPO&INPIT
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