| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve operability in assembling and prevent a foreign matter from intruding into a reduction gear by assembling the reduction gear in a housing as a single unit. SOLUTION: A reduction gear 21 is previously sub-assembled into a single unit, and this sub-assembled reduction gear 21 is inserted into a reduction gear case 3 of a housing 1. Then, an opening 3D of the reduction gear case 3 is blocked by a motor easing 17 of an electric motor 16. Combination of each components of the reduction gear 21 into the reduction gear case 3 does not require divided plural processes as a prior art, contamination management for each process can be eliminated, and operability in assembling can be improved.</p> |
