| 摘要 |
A planet-gear speed reducer includes a rotary carrier having a first end and a second end. The carrier has a plurality of equidistant spacers extending outward from the first end and a wheel gear formed at the second end. The carrier is further formed with a plurality of first radial slots defined in the first end among the spacers. A cap is attached to distal ends of the spacers, and formed with a plurality of second radial slots aligned with the first radial slots of the carrier. Additionally, a plurality of planetary gears is received in spacings between the spacers, with each planetary gear formed with a central spindle rotatable relative thereto. The central spindle has a pair of opposed ends movable along corresponding slots of the carrier and the cap.
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