107 results about "Hypocycloid" patented technology

The invention belongs to the technical field of spaceflight servo mechanisms and particularly discloses a cycloidal pin wheel speed reducer. The cycloidal pin wheel speed reducer comprises an input support, an output support, an input shaft and an output shaft, wherein the input support and the output support are fixedly connected, wherein the input shaft is an eccentric shaft, a non-outer-ring needle bearing is arranged outside the input shaft, an epicycloidal wheel is arranged outside the needle bearing, needle teeth are arranged outside the epicycloidal wheel in a meshing mode, an output shaft supporting bearing is arranged outside the shaft end of the output shaft, and the output support is located outside the output shaft supporting bearing. A retainer and a connection bolt are structurally omitted, and a W output mechanism is omitted, so that the axial size of the reducer is short, and a structure is more compact. The needle teeth are designed to be of eccentric structures, the epicycloidal wheel is eccentrically arranged relative to a hypocycloid wheel, the needle teeth eccentrically rotate while the positions of the rotary centers are fixed, and the rotary centers of the needle teeth are distributed on a concentric circle coincident with the rotary center of the hypocycloid wheel. The structural form is favorable for increasing the tooth number of the needle teeth meshed with the cycloid gears at the same time, and bearing capacity for transmission is improved.