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    • 2. 发明专利
    • ELECTRICAL INSULATING BEARING
    • JPH04357327A
    • 1992-12-10
    • JP6511091
    • 1991-03-28
    • RAILWAY TECHNICAL RES INSTBANDO CHEMICAL IND
    • WATANABE ASAKIFUSE YOSHIYAHATA KATSUHIKO
    • F16C33/58F16C35/077
    • PURPOSE:To satisfy the requirements on heat-resistance, corrosion-resistance and durability, etc., of an electrical insulating bearing, and enable the evaluation of the electrical insulating property of the bearing before its assembly to a housing. CONSTITUTION:An insulating layer 12 made of electrical insulating resin composition and a conductive layer 13 made of conductive resin composition or conductive metal are piled on a conductive outer wheel main frame 11 in order, and are unified to form an outer wheel 3 of a bearing 1. Insulating property of the bearing 1 is evaluated by measuring the electric resistance between the outer wheel main frame 11 and the conducive layer 13 before the assembly to a housing 2. In the case that the conductive layer 13 and the insulating layer 12 are made of the resin composition, the corrosion resistance is obtained. By using the resin composition having a high heat resistance temperature, the heat resistance is obtained. By using the resin composition contaminated with filler having a small coefficient of linear expansion, difference in the thermal expansion between the insulating layer 12 and the conductive layer 13 made of metal or the outer wheel main frame 11 made of metal is reduced so as to prevent peeling of each layer.
    • 3. 发明专利
    • ROLLING BEARING AND MANUFACTURE THEREOF
    • JPH03181618A
    • 1991-08-07
    • JP32176689
    • 1989-12-12
    • NIPPON SEIKO KKRAILWAY TECHNICAL RES INSTBANDO CHEMICAL IND
    • TSUJIMOTO YASUTOSHIWATANABE ASAKIKINOSHITA KOJIFUSE YOSHIYA
    • F16F15/04B29C45/14F16C33/58F16C33/64
    • PURPOSE:To obtain a rolling bearing having highly reliable electrical insulation and vibration isolating function by covering the outer circumferential face and the end faces of an outer ring main body with a coating layer of elastic material turning its terminal ends into circumferential grooves, and further jointing in one body a thin metallic ring body on the outer circumferential face without step difference against the coating layer. CONSTITUTION:The outer circumferential face 9 and the end faces 10 of an outer ring main body 8 are covered with a coating layer 11 of elastic material, and its end parts are formed to turn in circumferential grooves 14. Further, a thin metallic ring body 15 is jointed in one body on the outer circumferential face of the coating layer 11 covering the outer circumferential face 9 of the outer ring main body 8. In this way, the coating layer 11 covering the outer circumferential face of a bearing 1 is prevented to separate off by turning the terminal ends into the circumferential grooves 14, and an important range as a fitting surface is protected with the thin metallic ring body 15. The boundary between the thin metallic ring body 15 and the coating material is flush with each other, hereby, mass production of a rolling bearing having highly reliable electrical insulation and vibration isolating function can be easily performed.