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    • 5. 发明专利
    • DE112007000217T5
    • 2008-12-11
    • DE112007000217
    • 2007-01-23
    • NTN TOYO BEARING CO LTD
    • EGAMI MASAKIOYA YOSUKE
    • F16C33/66F16C33/78
    • The present invention provides a rolling bearing, for a tenter clip, which is capable of restraining deterioration of a sealing member even though the sealing member contacts ester oil, and is excellent in reliability and durability at high temperatures. A periphery of an outer ring of the rolling bearing for use in the tenter clip of a film-stretching apparatus is lubricated with the ester oil. In the sealing member which covers openings disposed at both axial ends of an inner ring and the outer ring of the rolling bearing, at least a portion of the sealing member which contacts the ester oil is made of (A) a fluororubber molding of a vulcanizable fluororubber composition which comprises a copolymer containing tetrafluoroethylene (TFE), propylene, and a to-be-crosslinked monomer consisting of unsaturated hydrocarbon, having two to four carbon atoms, in which a part of hydrogen atoms is substituted with fluorine atoms or (B) a fluororubber molding of at least one fluororubber composition selected from a vulcanizable fluororubber composition containing a TFE-propylene binary copolymer and a vulcanizable fluororubber composition containing a vinylidene fluoride-TFE-propylene ternary copolymer.
    • 8. 发明专利
    • DE112007001488T5
    • 2009-05-07
    • DE112007001488
    • 2007-06-29
    • NTN TOYO BEARING CO LTD
    • OYA YOSUKEEGAMI MASAKI
    • F16C33/44F04B39/00F16C33/56
    • An object is to provide a heat-resistant, oil-resistant rolling bearing which prevents release of low molecular weight polymers, additives and colorants that remain in trace amounts in the resin retainer from the resin body, thereby preventing deterioration of lubricating oil, and particularly a rolling bearing for use in a compressor of a refrigerating machine which prevents deterioration of refrigerating machine oil and which does not impair the function of capillary tubes of the refrigerating cycle. A heat-resistant, oil-resistant rolling bearing is proposed which includes a retainer made of at least one crystalline resin selected from a polyamide resin (polyamide 4-6, polyamide 6T or polyamide 9T), polyphenylene sulfide and polyetherketone, and having a melting point of not less than 280° C. Because the retainer is made of a resin having the above predetermined melting point, the retainer withstands high temperatures less than the above predetermined melting point and prevents release of its resin components into liquid outside the bearing. Also, because the retainer is made of a crystalline resin, the retainer absorbs smaller amounts of liquids outside the retainer. This also serves to suppress separation of low molecular weight polymers, additives and colorants from the resin body.
    • 9. 发明专利
    • DE112005003283T5
    • 2007-11-15
    • DE112005003283
    • 2005-12-27
    • NTN TOYO BEARING CO LTD
    • EGAMI MASAKIASAO MITSUNARIGOTO TOMOAKI
    • F16C33/78C08F214/26
    • The present invention provides a reliable and durable rolling bearing incorporated in various industrial machines, vehicles, and the like, having a sealing member which deteriorates to a low extent and maintains preferable sealing performance for a long time. The rolling bearing includes an inner ring; an outer ring; a plurality of rolling elements interposed between the inner ring and the outer ring; and the sealing member provided at an open portion which is disposed at both axial ends of the inner ring and the outer ring. The sealing member comprises a rubber molding that contacts at least water, an alkali solution, grease, or the like. The rubber molding is made of a vulcanizable fluororubber composition which comprises a copolymer containing tetrafluoroethylene; propylene; and a crosslinkable monomer which is an unsaturated hydrocarbon having two to four carbon atoms, in which a part of hydrogen atoms is substituted with fluorine atoms.