| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a decelerating device that has an increased lifespan as a result of increasing the length of rollers without increasing the axial length of a cage. <P>SOLUTION: An input axle 7 and an output axle 11 are coaxially arranged and opposed to each other, and a housing 1 covers the axial ends of both axles and supports an internal gear 3. Eccentric disks 9 are rotatably provided at the axial end of the input axle 7 in the internal gear 3. A cage 13 is provided at the axial end of the output axle 11, between the internal gear 3 and bearings 10 which are pressure fitted to the outer surfaces of the eccentric disks 9. Rollers 19 that can roll along the outer diameter surfaces of outer rings of the bearings 10 are housed in a plurality of pockets 18 in the cage 13. The rotation of the input axle 7 is reduced in accordance with the number of the internal teeth 4 and is transmitted to the output axle 11. A ring-shaped recess 21 is formed at an intersection between a closed-end surface 14 and an inner surface 20 of the cage 13 to make it possible for the axial length of the pockets 18 to be increased and therefore make it possible for the rollers 19, which have large axial length, to be used. Surface pressures of roller contacts can be reduced to thereby achieve an increase in the lifespan of the decelerating device. <P>COPYRIGHT: (C)2012,JPO&INPIT |
