| 摘要 |
PROBLEM TO BE SOLVED: To reduce the burden of a motor by providing a communicating hole, communicated with an air breather chamber, in a space formed near the mating face of a case by a plurality of supporting walls, thereby exhausting air, becoming high in temperature and pressure, to the outside of the case. SOLUTION: In the case of the temperature around a motor 1 becoming high, a communicating hole 13 communicated with an air breather chamber Ra is provided on the output shaft supporting wall 5h side of a space R formed near the mating face of a motor case 5 and a transmission case 8. Air in the space R is thereby made escape to the outside of the motor case 5 through the air breather chamber Ra, so that high temperature and high pressure in the space R and dewing generated in association with this are reduced, and the burden of the motor 1 easily affected by heat and water can be reduced. |
