Wave gear unit with input bearings

摘要

A wave gear unit has an input shaft positioned along a center axis by first and second input bearings. A first unit end plate at the first-input-bearing side is a composite member in which a bearing housing member of an iron-based material is integrated with an end plate main body member of a lightweight material. A second unit end plate at the second-input-bearing side is integrated with a rigid internally toothed gear, and is a composite member in which a second member of a lightweight material is integrated with a first member of a lightweight material. The first member has an end plate main body portion of the second unit end plate and a gear main body portion of the rigid internally toothed gear, while the second member has a bearing housing portion of the second unit end plate and a teeth formation portion of the rigid internally toothed gear.

主权项

1. A wave gear unit with input bearings comprising:
an input shaft; a first unit end plate for rotatably supporting a first shaft end of the input shaft via a first input bearing; a second unit end plate for rotatably supporting a second shaft end of the input shaft via a second input bearing; a wave gear mechanism having a wave generator which rotates integrally with the input shaft, a flexible externally toothed gear made to flex into a non-circular shape by the wave generator, and a rigid internally toothed gear partially meshed with the flexible externally toothed gear, the wave gear mechanism being disposed between the first and second unit end plates; the first unit end plate being a first composite member which has a first unit end plate main body member and an annular first bearing housing member for supporting the first input bearing, the first bearing housing member being integrated with the first unit end plate main body member; the second unit end plate being a second composite member which has a second unit end plate main body member and an annular second bearing housing member for supporting the second input bearing, the second bearing housing member being integrated with the second unit end plate main body member; the first bearing housing member and the second bearing housing member being formed from an iron-based material; and the first unit end plate main body member and the second unit end plate main body member being formed from a lightweight material that is lighter than the iron-based material.