| 摘要 |
A speed reducer comprising at least one first reduction stage and one second reduction stage (3, 4), in which the second stage (4) has cylindrical gears (5, 6) with drive input and output shafts (8, 7) having parallel axes, and in which the drive input shaft (8) of the second stage (4) is hollow and houses coaxially a drive input shaft (17) of the first stage (3), the first reduction stage (3) being disposed at an end of the hollow shaft (8) axially remote from the position in which a motor (15) is mounted.
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