Patent ID: 9391482
Filing Date: 2016-07-12
CPC Classification: F16H,F16J,H02K

Claim Text:
1. A grease leakage preventing structure for a gear reducer of a dynamoelectric machine with the gear reducer, in which gear teeth are provided in a leading edge portion of an output shaft of a dynamoelectric machine, the leading edge portion of the dynamoelectric machine output shaft is introduced into a case of a gear reducer via an input port of the gear reducer, and the dynamoelectric machine output shaft with the gear teeth is engaged with a gear arranged inside the case of the gear reducer, the grease leakage preventing structure comprising: a grease blocking member provided on a terminal end of an engagement portion of the dynamoelectric machine output shaft and configured to inhibit inflow of grease into the dynamoelectric machine, wherein the grease blocking member is provided with a wall surface portion formed in a direction perpendicular to the gear teeth provided in the leading edge portion of the dynamoelectric machine output shaft, wherein a plurality of protrusions is provided on a surface of a cylindrical portion of the grease blocking member formed in a direction perpendicular to the gear teeth provided in the leading edge portion of the dynamoelectric machine output shaft as the wall surface portion of the grease blocking member, and wherein helically cut gear teeth are provided as the gear teeth provided in the leading edge portion of the dynamoelectric machine output shaft.