会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 42. 发明公开
    • TAPERED ROLLER BEARING
    • EP3981994A1
    • 2022-04-13
    • EP21211496.1
    • 2018-03-27
    • NTN Corporation
    • KAWAI, TakashiMATSUSHITA, Tomoki
    • F16C19/36F16C33/36F16C33/46F16C33/58F16C33/64F16C33/66
    • A suitable tapered roller bearing which is less in torque loss and heat generation caused by friction and shorter in running-in period is provided. The tapered roller bearing comprises an outer ring including an outer-ring raceway surface around an inner circumferential surface; an inner ring arranged on a radially inner side relative to the outer ring. The inner ring includes an inner-ring raceway surface around an outer circumferential surface and a larger flange surface arranged on a larger diameter side relative to the inner-ring raceway surface. A plurality of tapered rollers is disposed between the outer-ring raceway surface and the inner-ring raceway surface. The tapered roller includes a rolling surface in contact with the outer-ring raceway surface and the inner-ring raceway surface and a larger end face in contact with the larger flange surface. The rolling surface of the tapered roller is provided with a crowning profile. A chamfered portion is provided between the larger end face and the crowning profile. A recess is provided in a central portion of the larger end face. A projection is provided in an outer circumferential portion of the larger end face, the projection having an inner circumferential end of projection connected to the recess and an outer circumferential end connected to a chamfered portion, in a cross section along a rolling axis of the tapered roller. The large end face includes points C1 and C4 connecting the outer circumferential end of the projection and the chamfered portion, points C2 and C3 connecting the inner circumferential end of the projection and the recess, an intermediate point P5 between the point C1 and the point C2 on the large end face, and an intermediate point P6 between the point C3 and the point C4 on the large end face. A value of R/RBASE is not smaller than 0.75 and not greater than 0.87, with R representing a reference radius of curvature of a single arc which passes through the point C1, the intermediate point P5, the intermediate point P6, and the point C4 in the cross section and RBASE representing a distance from an apex of a cone angle of the tapered roller to the larger flange surface of the inner ring.