Parallel axis gear power transmission device

摘要

A power transmission device is provided which can fit into a main machine such as conveyors at low costs and can readily meet low-noise requirements as well. A parallel axis gear power transmission device accommodates, in a casing, a speed reduction section for reducing the rotational speed of an input shaft. The speed reduction section comprises a parallel axis gear mechanism. The casing is configured such that at least two flat surfaces are in contact with a virtual circle which can be drawn about an axial center of the output shaft, and the two flat surfaces are flared respectively toward the side on which the input shaft is present.