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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
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。
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公开(公告)号：EP2708767B1
公开(公告)日：2018-08-22
申请号：EP12785462.8
申请日：2012-04-24
申请人： NTN Corporation
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.
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公开(公告)号：EP2570687A1
公开(公告)日：2013-03-20
申请号：EP11780474.0
申请日：2011-04-19
申请人： NTN Corporation
发明人： KATAYAMA Yasuyuki
CPC分类号： F16C33/7823 , F16C19/06 , F16C33/726 , F16C33/7856 , F16C33/805 , F16C35/067 , F16C2240/42 , F16C2361/63 , F16H55/36 , F16J15/164 , F16J15/3456
摘要： A ball bearing with seals on both sides is provided which is configured such that the pressure in the bearing interior is less likely to drop when a belt guide ring cools after it has been formed by resin molding, thus preventing the inwardly extending lip of each rubber seal from being pressed against the inner side surface of the seal groove. The belt guide ring (21) is formed on the radially outer surface of an outer race (2) of the bearing. Seal fitting grooves (8) are formed on the radially inner surface of the outer race (2) at its respective end portions. A rubber seal (10) has its radially outer portion fitted in each seal fitting groove (8). The rubber seal (10) has an inwardly extending lip (12) formed at its radially inner portion and having its tip elastically kept in contact with an inner side surface of one of two seal grooves (9) formed on the radially inner surface of an inner race (3) of the bearing, thereby sealing the bearing interior, and having an inwardly extending lip (12) having a tip which is kept in elastic contact with an inner side surface (9a) of the corresponding seal groove (9), thereby sealing the bearing interior. The contact surface of the inwardly extending seal lip (12) which is in elastic contact with the inner side surface (9a) of the seal groove (9) is formed with a recess (18) extending a limited circumferential range of the contact surface and defining a minute gap in cooperation with the inner side surface (9a) of the seal groove (9). With this arrangement, when the temperature and thus the pressure in the bearing interior rises when the belt guide ring (21) is formed by resin molding, the pressure is released to the exterior of the bearing through the gap defined by the recess (18). The pressure in the bearing interior is thus kept constant when the guide ring cools down after resin molding. This prevents the inwardly extending lip (12) from being pressed hard against the inner side surface (9a) of the seal groove (9) of the inner race (3).
摘要翻译： 提供一种具有两侧密封件的滚珠轴承，其构造成使得当带式导向环在通过树脂模制形成之后，轴承内部的压力不太可能下降，从而防止每个橡胶的向内延伸的唇缘 密封件被压靠在密封槽的内侧表面上。 带导向环（21）形成在轴承的外圈（2）的径向外表面上。 密封配合槽（8）在其各个端部形成在外座圈（2）的径向内表面上。 橡胶密封件（10）的径向外部装配在每个密封配合槽（8）中。 橡胶密封件（10）具有形成在其径向内部部分处的向内延伸的唇部（12），并且其顶端弹性地保持与形成在第二密封件的径向内表面上的两个密封槽（9）中的一个的内侧表面接触 轴承的内圈（3），从而密封轴承内部，并具有向内延伸的唇部（12），其具有与相应的密封槽（9）的内侧表面（9a）弹性接触的尖端， 从而密封轴承内部。 与密封槽（9）的内侧表面（9a）弹性接触的向内延伸的密封唇（12）的接触表面形成有在接触表面的有限的周向范围内延伸的凹部（18） 与所述密封槽（9）的内侧表面（9a）配合形成微小间隙。 利用这种布置，当通过树脂模制形成带引导环（21）时，当轴承内部的温度和压力升高时，通过由凹部（18）限定的间隙将压力释放到轴承的外部， 。 因此，在树脂成形后导向环冷却时，轴承内部的压力保持恒定。 这防止向内延伸的唇缘（12）被硬压靠在内座圈（3）的密封槽（9）的内侧表面（9a）上。
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