Patent ID: 6796922
Filing Date: 2004-09-28
Classification: F16H

Abstract:
A planetary gear comprising an inner gear, a sun gear disposed at an inner side of said inner gear with an axis thereof aligned with that of said inner gear, a planetary gear disposed between and in parallel relation with said inner gear and said sun gear and adapted to transmit rotation between said inner gear and said sun gear, and a carrier relatively rotatably disposed with an axis thereof aligned with that of said inner gear and having a receiving hole for receiving said planetary gear such that said planetary gear can rotate on its own axis, said carrier being provided with two releasing parts extending along the axis of said receiving hole and adapted to intercommunicate an interior part and an exterior part of said receiving hole, one of said two releasing parts being formed at an outer side and the other at an inner side in the radial direction of said carrier, an outer peripheral part of said planetary gear being exposed to the outside of said receiving hole through said two releasing parts, whereina helical gear is used as said planetary gear, and at least one tooth of said planetary gear is capable of contacting an end edge facing said releasing parts at the inner peripheral surface of said receiving hole irrespective of a rotational position of said planetary gear.