MANUFACTURING DEVICE FOR HYDRODYNAMICAL GROOVED BEARING

摘要

PURPOSE:To manufacture a hydrodynamical grooved bearing at low cost simply by arranging a solid ball by holding it freely rollingly with a calking means on the annular groove of the outer diameter part of a guide pin concentrically arranged at the inner diameter part of a bearing bush. CONSTITUTION:A solid guide pin 10 is concentrically arranged at the inner diameter part of a bearing bush 2. The annular groove 10a of a semi-circular bottom part is formed at the outer diameter part of this guide pin 10. A solid ball 4 in the diameter equal to or slightly smaller than the groove width is arranged at plural places in the circumferential direction on this annular groove 10a. This ball 4 is moreover held freely rollingly and in the circumferential and radial directions by the calking part 10b of the annular groove 10a. This guide pin 10 is fed at feeding speed V in the axial direction with rotating it at a rotating speed W for the bearing bush 2 by a driving means (figure omitted). A fluid groove 2a is thus spirally subjected to plastic working at the bearing bush inner diameter part by the respective rolling ball 4 to obtain a hydrodynamical grooved bearing.