Patent ID: 9145919
Filing Date: 2015-09-29
Classification: F16C,F16H

Abstract:
1. A speed-reduction transmission bearing, comprising: a first outer race comprising a first outer race wall, a first inner race wall, a second inner race wall, a first annular roller groove extending around said first inner race wall, and a plurality of first inner teeth located at said second inner race wall, the diameter of said first inner race wall being larger than the diameter of said second inner race wall; a second outer race rotatably mounted within said first inner race wall of said first outer race, said second outer race comprising a second outer race wall, a third inner race wall, a second annular roller groove located at said second outer race wall, and a plurality of second inner teeth located at said third inner race wall, said second inner teeth and said first inner teeth defining a tooth number difference; a plurality of first rolling elements arranged between said first annular roller groove of said first outer race and said second annular roller groove of said second outer race; an inner race rotatably mounted within said first outer race and said second outer race, said inner race comprising a third outer race wall, a fourth inner race wall and a plurality of outer teeth located at said third outer race wall; and a wave generator rotatably mounted within said inner race and supported on said fourth inner race wall of said inner race to force the outer teeth at at least one segment of said inner race into engagement with said first inner teeth and said second inner teeth, wherein said wave generator comprises a cam and a plurality of third rolling elements, said cam comprising a plurality of pivot axles at the periphery thereof, said third rolling elements being respectively mounted around said pivot axles and stopped against said fourth inner race wall of said inner race.