Patent ID: 9506555
Filing Date: 2016-11-29
CPC Classification: F16H

Claim Text:
1. A hollow-type planet speed reducer comprising: a body; a tubular member passing through the body, the tubular member having a theoretical axial line passing therethrough and an accommodating space within to receive wires; at least one driving gear driven by a power input source and connected to a transmission gear, the transmission gear connected to a first gear, the at least one driving gear having no direct connection with the first gear, the at least one driving gear having less teeth than the transmission gear; a second gear disposed coaxial with the first gear within the body, the second gear having teeth formed on an interior circumference thereof; a sun gear fixedly secured to the first gear via a connecting member and coaxial with the first gear, the second gear encircling the sun gear, the tubular member passing through the sun gear; and a plurality of planet gears disposed around the tubular member and attached to pivot on a rotatable output member, each planet gear connected to the sun gear and the second gear, the sun gear having no direct connection with the second gear, the planet gears thereby driven by a cooperation between the second gear and the sun gear to move around the sun gear so as to rotate the output member, wherein the tubular member passes through the first gear, and the at least one driving gear and the transmission gear are disposed in the body and radially displaced from the axial line of the tubular member.