Abstract: An eccentric oscillating speed reducer includes: first and second external gears, each having shaft penetration holes in respective circumferences thereof; eccentric shafts, having first and second crank portions passing through the shaft penetration holes, with the first and second external gears furnished on the first and second crank portions, respectively; a supporting member inserted through a first shaft penetration hole of the first external gear and a second shaft penetration hole of the second external gear, and being in eccentric contact with inner peripheries of the shaft penetration holes; first and second output portions, each having shaft penetration holes on respective circumferences thereof, with both ends of an axis of each of the eccentric shafts furnished in the shaft penetration holes, and the first and second output portion being connected by the supporting member; and an annular gear engaged with the first and second external gears.

Abstract: An eccentric oscillating speed reducer includes: first and second external gears, each having shaft penetration holes in respective circumferences thereof; eccentric shafts, having first and second crank portions passing through the shaft penetration holes, with the first and second external gears furnished on the first and second crank portions, respectively; a supporting member inserted through a first shaft penetration hole of the first external gear and a second shaft penetration hole of the second external gear, and being in eccentric contact with inner peripheries of the shaft penetration holes; first and second output portions, each having shaft penetration holes on respective circumferences thereof, with both ends of an axis of each of the eccentric shafts furnished in the shaft penetration holes, and the first and second output portion being connected by the supporting member; and an annular gear engaged with the first and second external gears.

Abstract: A rotating device includes a rotating disc and a combined transmission shaft. The rotating disc includes a turret and multiple driven rollers. The combined transmission shaft includes a first roller gear cam and a second roller gear cam. The first roller gear cam includes a first shaft, a combined shaft and a first helical tooth. The combined shaft protrudes outward from a side of the first shaft. The first shaft is surrounded by the first helical tooth and has a first outer surface and a first inner surface. The second roller gear cam includes a second shaft and a second helical tooth. The second shaft has a combination hole. The second shaft is surrounded by the second helical tooth and has a second outer surface and a second inner surface. The combined shaft passes through the combination hole.

Abstract: A rotating device includes a rotating disc and a combined transmission shaft. The rotating disc includes a turret and multiple driven rollers. The combined transmission shaft includes a first roller gear cam and a second roller gear cam. The first roller gear cam includes a first shaft, a combined shaft and a first helical tooth. The combined shaft protrudes outward from a side of the first shaft. The first shaft is surrounded by the first helical tooth and has a first outer surface and a first inner surface. The second roller gear cam includes a second shaft and a second helical tooth. The second shaft has a combination hole. The second shaft is surrounded by the second helical tooth and has a second outer surface and a second inner surface. The combined shaft passes through the combination hole.

Abstract: A two-stage differential cycloidal speed reducer with a high reduction ratio is provided, including: a plurality of supporting crank shafts; an input shaft including a first crank shaft portion and a second crank shaft portion; a first cycloidal gear provided on the first crank shaft portion; a second cycloidal gear provided on the second crank shaft portion and connected with the first cycloidal gear through the supporting crank shafts; a plurality of first ring pins provided around the outer circumference of the first cycloidal gear and in sliding contact with a plurality of teeth on the periphery of the first cycloidal gear; a first annular gear with the plurality of first ring pins; a plurality of second ring pins provided around the outer circumference of the second cycloidal gear and being in sliding contact with a plurality of teeth on the periphery of the second cycloidal gear; and a second annular gear with the plurality of second ring pins.

Abstract: A two-stage differential cycloidal speed reducer with a high reduction ratio is provided, including: a plurality of supporting crank shafts; an input shaft including a first crank shaft portion and a second crank shaft portion; a first cycloidal gear provided on the first crank shaft portion; a second cycloidal gear provided on the second crank shaft portion and connected with the first cycloidal gear through the supporting crank shafts; a plurality of first ring pins provided around the outer circumference of the first cycloidal gear and in sliding contact with a plurality of teeth on the periphery of the first cycloidal gear; a first annular gear with the plurality of first ring pins; a plurality of second ring pins provided around the outer circumference of the second cycloidal gear and being in sliding contact with a plurality of teeth on the periphery of the second cycloidal gear; and a second annular gear with the plurality of second ring pins.