Patent ID: 9689466
Date: 2017-06-27
CPC Classifications: F16H,H02K

Claim:
1. A gear motor comprising a reduction mechanism, said reduction mechanism comprising: a planetary gear mechanism which comprises a sun gear and an internal gear, a first planetary two-stage gear arrayed so as to be positioned between the sun gear and the internal gear, said first planetary two-stage gear comprising a small gear and a large gear, a second planetary two-stage gear comprising a small and a large gear, wherein the small gear or the large gear of the first planetary two-stage gear meshes together with the large gear or the small gear of the second planetary two-stage gear, and a ratio of the number of teeth of the large gear to the number of teeth of the small gear of the first planetary two-stage gear is an integral multiple, and both end portions of the first planetary two-stage gear are supported by ball bearings and a ratio of the number of teeth of the large gear to the number of teeth of the small gear of the second planetary two-stage gear is not an integral multiple.