公开(公告)号：US20140064649A1

公开(公告)日：2014-03-06

申请号：US14114588

申请日：2012-04-24

申请人： Shohei Fukama ,  Yasuyuki Katayama ,  Takahiro Okada ,  Katsuaki Sasaki

发明人： Shohei Fukama ,  Yasuyuki Katayama ,  Takahiro Okada ,  Katsuaki Sasaki

IPC分类号： F16C33/38 ,  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： A retainer for a ball bearing includes two annular members that face each other in an axial direction thereof. The two annular members include opposed surfaces each having hemispherical pockets that are formed at 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 to couple together the two annular members. The hemispherical pockets each have an inner peripheral surface provided with ball contact and ball non-contact surfaces. The ball contact surface is formed at a central portion in a pocket circumferential direction and at least at a central portion in a pocket axial direction of the inner peripheral surface. The ball non-contact surface includes a recess recessed to an opposite side to a corresponding ball across the ball contact surface and is opened in at least one of pocket axial ends.

摘要翻译： 用于球轴承的保持器包括在其轴向上彼此面对的两个环形构件。 两个环形构件包括相对的表面，每个表面均具有形成在两个环形构件中的每一个的圆周方向上的位置并且构造成接收球的半球形凹穴。 相对的表面彼此卡扣配合以将两个环形构件连接在一起。 半球形凹穴各自具有设置有球接触和球非接触表面的内周表面。 球接触面形成在凹部周向的中央部，至少在内周面的凹部轴向的中央部。 球非接触表面包括凹入到与球接触表面相对的相对侧的凹部的凹部，并且在凹部轴向端部中的至少一个中敞开。

公开(公告)号：US20130051718A1

公开(公告)日：2013-02-28

申请号：US13696087

申请日：2011-04-19

申请人： Yasuyuki Katayama

发明人： Yasuyuki Katayama

IPC分类号： F16C33/76

CPC分类号： F16C33/7823 ,  F16C19/06 ,  F16C33/726 ,  F16C33/7856 ,  F16C33/805 ,  F16C35/067 ,  F16C2226/30 ,  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).