| 摘要 |
PURPOSE: To miniaturize and to reduce the weight by fitting an outer ring having a gear part to a free end of a shaft member to be fitted in a canti-lever condition through a roller to limit the dimensions in the axial direction. CONSTITUTION: An outer ring 11 is rotated by each roller 13 to be held by a holder 14 which is rolled between track surfaces 11a, 12a of the outer ring 11 and a shaft member 12. The lubricant to be fed through a lubricant feed hole 12h of the shaft member 12 reaches the roller 13 between the track surfaces 11a, 12a to smooth the rolling of the roller 13, i.e., the rotation of the outer ring 11. The lubricant outflows to a gear part 11c of the outer circumference of the outer ring through a communicating hole 11d formed in the outer ring 11 to reduce the friction between each engaged surface of the gear part 11c and a transmission gear, and smooth the transmission of the torque. When a ball is employed as a roller, the dimensions in the axial direction of the bearing as a whole can be reduced though the load-carrying capacity is inferior to that of the roller 13.
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