| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent the sag of hills in dynamic groove regions which are formed at the internal peripheral face of a sintered bearing, and to improve the rigidity of the bearing. <P>SOLUTION: The annular hills 8a6, 8a7 for connecting ends of a plurality of inclined hills 8a3, 8a4 over entire peripheries of the hills are formed at least at one-end sides in axial directions of the dynamic groove regions formed at radial bearing faces A1, A2. By this, there are formed annular recesses 20a6, 20a7 which connect ends of inclined recesses 20a3, 20a4 which form the inclined hills 8a3, 8a4 out of molding metal molds 20a, 20b forming the dynamic groove regions, the ends of the inclined recesses 20a3, 20a4 are not brought into states that they are surrounded at three faces, thereby a material of a sintered body can easily enter the bearing, and thus the inclined hills 8a3, 8a4 can be accurately molded up to their ends. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
