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    ROLLING BEARING
    2.
    发明公开
    ROLLING BEARING 审中-公开
    滚动轴承

    公开(公告)号：EP2554864A1

    公开(公告)日：2013-02-06

    申请号：EP11762604.4

    申请日：2011-03-18

    申请人： NTN Corporation

    发明人： OKADA Takahiro ,  MINENO Katsunori

    IPC分类号： F16C33/62 ,  F16C33/32 ,  F16C33/34

    CPC分类号： F16C33/32 ,  F16C19/06 ,  F16C33/62 ,  F16C33/64 ,  F16C2204/70 ,  F16C2361/61

    摘要： A rolling bearing is disclosed of which the lifespan is increased by reducing brittle flaking and impression-induced flaking on the raceways of inner and outer races and the rolling elements. Steel containing 1.80-1.89% by weight of chrome (brittle flaking-resistant steel) is subjected to carbonitriding and then to hardening and tempering. The chrome reduces generation of white layers which are aggregates of carbon, thus reducing brittle flaking on e.g. the raceways (1a, 4a) due to the white layers. A residual austenite region (5) that forms when the steel is hardened and tempered increases toughness of the steel surface, thus reducing impression-induced flaking due to foreign matter such as wear dust. By reducing both brittle flaking and impression-induced flaking, it is possible to extend the lifespan of the bearing, and reduce maintenance cost such as the cost for changing lubricating oil.

    摘要翻译： 公开了一种滚动轴承，其通过减少内圈和外圈以及滚动元件的滚道上的脆性剥落和压痕引起的剥落来增加使用寿命。 含有1.80-1.89％（重量）铬（脆性耐剥落钢）的钢进行碳氮共渗，然后进行硬化和回火。 铬减少了作为碳的聚集体的白色层的产生，从而减少了例如脆性剥落。 由于白色层，滚道（1a，4a）。 当钢硬化和回火时形成的残余奥氏体区域（5）增加了钢表面的韧性，因此减少了由于诸如磨损粉尘的异物引起的印痕引起的剥落。 通过减少脆性剥落和印痕引起的剥落，可以延长轴承的使用寿命，并降低维护成本，例如改变润滑油的成本。

    RETAINER FOR BALL BEARING, AND BALL BEARING
    3.
    发明公开
    RETAINER FOR BALL BEARING, AND BALL BEARING 有权
    HALTERFÜREIN KUGELLAGER UND KUGELLAGER

    公开(公告)号：EP2708767A1

    公开(公告)日：2014-03-19

    申请号：EP12785462.8

    申请日：2012-04-24

    申请人： NTN Corporation

    发明人： FUKAMA Shohei ,  KATAYAMA Yasuyuki ,  OKADA Takahiro ,  SASAKI Katsuaki

    IPC分类号： F16C33/38 ,  F16C19/06 ,  F16C33/66 ,  F16C33/78

    CPC分类号： F16C33/3862 ,  F16C19/06 ,  F16C33/3806 ,  F16C33/3875 ,  F16C33/3887 ,  F16C33/6651 ,  F16C33/7823 ,  F16C33/7893 ,  F16C2208/36 ,  F16C2208/52 ,  F16C2208/60 ,  F16C2226/74 ,  F16C2326/01 ,  F16C2361/61

    摘要： Provided are a retainer for a ball bearing and a ball bearing, which are capable of reducing torque. The retainer for a ball bearing comprises two annular members that face each other in an axial direction thereof. The two annular members have opposed surfaces each comprising hemispherical pockets that are formed at a plurality of positions in a circumferential direction of each of the two annular members and configured to receive balls. The opposed surfaces are snap-fitted to each other so as to couple the two annular members to each other. The hemispherical pockets each have an inner peripheral surface provided with a ball contact surface and a ball non-contact surface. The ball contact surface is formed at a central portion in a pocket circumferential direction of the inner peripheral surface and at least at a central portion in a pocket axial direction of the inner peripheral surface. The ball non-contact surface comprises a recess that is recessed to an opposite side to corresponding one of the balls across the ball contact surface. The recess is opened in at least one of pocket axial ends.

    摘要翻译： 提供能够减小扭矩的用于球轴承和滚珠轴承的保持器。 用于球轴承的保持器包括在其轴向方向上彼此面对的两个环形构件。 两个环形构件具有相对的表面，每个表面都包括半球形凹穴，该半球形凹穴形成在两个环形构件中的每一个的圆周方向上的多个位置并且构造成接收球。 相对的表面彼此卡扣配合，以将两个环形构件彼此连接。 半球形凹穴各自具有设置有球接触表面和球非接触表面的内周表面。 球接触面形成在内周面的凹部周向的中央部，并且至少在内周面的凹部轴向的中心部。 球非接触表面包括凹槽，该凹槽与穿过球接触表面的相应球之间的相对侧凹入。 凹槽在口袋轴向端部中的至少一个中敞开。