Bearing boxes for rotary shafts subjected to twisting moments

摘要

An improvement in bearing boxes adapted to mount on rotary shafts objects subjected to twisting moments. Such objects are conventionally mounted by means of a pair of oppositely disposed conical roller bearings, and the improvement comprises a third conical roller bearing disposed adjacent to the sides of the objects opposite to the sides subjected to the twisting moments. The invention is particularly adapted to, and is illustrated in the context of, agricultural earth- working implements such as harrows.