| 摘要 |
PROBLEM TO BE SOLVED: To provide an eccentric rocking type reducing gear which enlarges a hollow diameter of an eccentric body shaft while securing a high strength in the neighborhood of the tip of a connection pin, in the eccentric rocking type reducing gear of such a structure that the tip of the connection pin is fitted up to the middle in the axial direction of a carrier.SOLUTION: An eccentric rocking type reducing gear includes: an input shaft 12 (eccentric body shaft) having a hollow part; external teeth gears 22, 24 rocked by eccentric bodies 14, 16 disposed on the input shaft; an internal teeth gear 26 with which the external teeth gears, while being rocked, are inscribed and meshes; a pair of first and second carriers which support the input shaft via first and second ball bearings 40, 42; and an internal pin 28 (connection pin) which is connected to the first and second carriers and has the tip thereof fitted up to the middle in the axial direction of the first carrier of one side. Therein, an outer diameter d1 of the first ball bearing arranged on the first carrier is larger than a diameter d3 of the second ball bearing arranged on the second carrier, and the first ball bearing arranged on the first carrier is assembled into the first carrier from the outside in the axial direction and is positioned on a position separated from the tip of the internal pin in the axial direction. |
