Patent ID: 9022896
Filing Date: 2015-05-05
Classification: F16H

Abstract:
1. A planet type gear unit comprising: a circumferential floating ring gear (I); two cloth boards, fixed on a left and a right axial end of the ring gear respectively, each cloth board has a hollow shaft sleeve at a center of the cloth board, a first pair of bearings, one on each of the hollow shaft sleeves, an outer ring of each bearing is fixed on a stationary part of the planet gear unit, thereby the cloth boards are turn-able relative to the stationary part of the planet gear unit; an eccentric wheel, constructed by two spindles, each spindle having concentric axis at both ends of the eccentric wheel, and a multiple of eccentric shafts at the middle of the eccentric wheel, the two spindles extend into the two hollow shaft sleeves and are supported therein by a second group of bearings respectively; a multiple of external gears on the multiple of eccentric shafts are supported through a third group of bearings, each of the multiple of external gears are meshed with the ring gear forming meshed pairs respectively, included angles of each of the multiple of eccentric shafts, in a plane which is vertical to the axis of the eccentric wheel, are equal; an output fixed with the left hollow shaft sleeve has a same axis with the eccentric wheel, which is an input.