TRANSMISSION

摘要

A transmission 18/20 includes a housing 16 and a gear assembly 21 supported by the housing. The gear assembly includes a shaft 23 carried by the housing, a bull gear 24 attached to the shaft, and a helical gear shaft 25 carried by the housing. The helical gear shaft incorporates a helical gear 26 operatively connected to the bull gear. The transmission can be either a single-speed transmission or a variable-speed transmission. The single speed transmission employs a pulley 130 attached to the helical gear shaft, and a belt 140 wrapped around the pulley. The variable-speed transmission employs a driven pulley 230 supported by the helical gear shaft, an idler pulley 270 pivotably attached to the housing, and a belt 240 wrapped around the driven pulley and the idler pulley.