REDUCTION GEAR, ROBOT HAND, ROBOT, MOVABLE BODY, GEARED MOTOR AND ELECTRONIC COMPONENT CONVEYING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a reduction gear having a configuration in which a lubrication oil is held between a through-hole and a through pin and in which torque loss caused by the through-hole and the through pin sliding with each other is suppressed.SOLUTION: A reduction gear includes: a ring gear in which first gear teeth are formed on an inner periphery; a second revolution gear 8 in which gear teeth 8a engaging with the first gear teeth are formed; a circular cam which is provided at a center position of the second revolution gear 8 in a rotatable manner; a rotary shaft which is provided at the circular cam, which makes the circular cam rotate around a central axis and which makes the second revolution gear 8 revolve around the central axis; a through pin 13 which is inserted in a second through-hole 8c formed at the second revolution gear 8; and a support part which has a connection hole in which the through pin 13 is inserted and connected, and which outputs rotation by the rotation of the second revolution gear 8 by supporting the through pin 13. On an outer peripheral surface 13g of the through pin 13, liquid reservoir parts 31d are provided for storing a lubrication oil 31. The liquid reservoir parts 13d are provided on an inside surface 13e facing a central axis 5 of the ring gear and on an outside surface 13f facing the opposite side of the central axis 5.