| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing device suitable particularly for a high-rotating-speed bearing, having simple construction for supplying a required amount of oil to a required lubrication portion to reduce oil consumption while preventing the fly of oil mist to the outside, and preventing environmental pollution due to the oil mist. SOLUTION: In the bearing device, an oil hole 10 is formed in an outer ring 2 to open toward the vicinity of a contact portion with rolling elements 3, an oil passage 8 is provided in communication with the oil hole 10 of the outer ring 2 for supplying oil to the oil hole 10, and an orifice member 5 having an oil jet 5a whose diameter is smaller than those of each of the oil hole 10 of the outer ring 2 and the oil passage 8 is fixed through the oil passage 8. The oil passage 8, the oil jet 5a and the oil hole 10 of the outer ring 2 are arranged on the same axial line. A relationship between the diameter of the oil jet 5a and that of the oil hole 10 of the outer ring 2 is set so that the oil introduced into the oil passage 8 is supplied from the oil jet 5a of the orifice member 5 through the oil hole 10 of the outer ring 2 to the vicinity of the contact portion. COPYRIGHT: (C)2008,JPO&INPIT
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