Development of New Type of Variable Speed Power Transmission using V-belt

We have successfully developed a light-loading no-stage variable speed power transmission using V-belt for agricultual and general industrial machines enabling easier manipulation and faster transmission than conventional V-belt transmissions. This paper describes the fundamental operation principle of the transmission, and reports the results of the experimentl studies.

The V-belt no-stage transmission is a power transmission which allows the ratio of the revolutions on the input axis to that on the output axis to be controlled with no stage by changeing the winding pitch diameter of a single V-belt put on a variable width (variable speed) pulley.

The new transmission we have developed (called VSW-type transmission) is characterized by the linkage of the open/close of driving and driven pulleys with the fundament al principle to reduce operation load during ratio change. In addition, the structure of this transmission is simplified to add the functions described above as well as to keep the features of conventional variable speed power transmissions using V-belt.