Abstract: A multistage pericyclic gear reducer includes an input shaft, an input external-teeth gear coaxially coupled to and rotatable with the input shaft, a first middle planet ring gear coupled between a first driver ring gear and a first driven wheel. The first driver ring gear meshed with the input external-teeth gear. The multistage pericyclic gear reducer further includes a second middle planet ring gear coupled between the first driven wheel and a second driven wheel, an output external-teeth gear extended through and meshed with both the first middle planet ring gear and the second middle planet ring gear, and a central output shaft coupled to the output external-teeth gear.

Abstract: A pericyclic gear reducer may include a middle planet ring gear coupled between a driver ring gear and a driven wheel utilizing a first prismatic joint on a first side of the middle planet ring gear and a second prismatic joint on a second side of the middle planet ring gear. The pericyclic gear reducer may further include an input shaft rotatably coupled to the driver ring gear and the driver ring gear configured to transfer the rotational movement of the input shaft to the middle planet ring gear. The pericyclic gear reducer may further include an output sun gear coupled to the middle planet ring gear. The output sun gear further rotatably coupled to a central output shaft.

Abstract: A pericyclic gear reducer may include a middle planet ring gear coupled between a driver ring gear and a driven wheel utilizing a first prismatic joint on a first side of the middle planet ring gear and a second prismatic joint on a second side of the middle planet ring gear. The pericyclic gear reducer may further include an input shaft rotatably coupled to the driver ring gear and the driver ring gear configured to transfer the rotational movement of the input shaft to the middle planet ring gear. The pericyclic gear reducer may further include an output sun gear coupled to the middle planet ring gear. The output sun gear further rotatably coupled to a central output shaft.

Abstract: A multistage pericyclic gear reducer includes an input shaft, an input external-teeth gear coaxially coupled to and rotatable with the input shaft, a first middle planet ring gear coupled between a first driver ring gear and a first driven wheel. The first driver ring gear meshed with the input external-teeth gear. The multistage pericyclic gear reducer further includes a second middle planet ring gear coupled between the first driven wheel and a second driven wheel, an output external-teeth gear extended through and meshed with both the first middle planet ring gear and the second middle planet ring gear, and a central output shaft coupled to the output external-teeth gear.