| 摘要 |
<p>A speed reducer, comprising a casing in which a first internal volume part storing a gear mechanism for transmitting a torque at an input part to an output part at a reduced speed and a lubricant is sealed is formed and a second space volume part formed to communicate with the first internal volume part. The second space volume part is disposed in the internal volume part at a position vertically higher than a specified height, and an air vent hole is formed in a part of the second space volume part.</p> |
