Planetary gear reducer

摘要

A planetary gear reducer has a planetary carrier supported by an input-side main bearing and an output-side main bearing. An angular contact ball bearing or a deep groove ball bearing which requires less installation space and is inexpensive is used for the input-side main bearing. A tapered roller bearing having a large capacity is used for the output-side main bearing. A compact, flat and inexpensive planetary gear reducer can be realized in comparison with a case in which the both main bearings are tapered roller bearings.

主权项

1. A planetary gear reducer comprising:
a tubular housing a planetary gear; a planetary carrier for supporting the planetary gear in the tubular housing; and a pair of main bearings for supporting the planetary carrier on an inner peripheral surface of the housing; wherein the pair of the main bearings are either one of the following combinations of:
a deep groove ball bearing and an angular contact ball bearing;a deep groove ball bearing and a tapered roller bearing; andan angular contact ball bearing and a tapered roller bearing.