Mechanical Variable Speed Drives

WORKING PRINCIPLE :
Sectional drawing illustrates the constructional details of speed variator. It works on principle of friction drive through conical rollers having metal to metal contact with driving and driven elements through an extremely thin elastohydrodynamic film of lubricant between contact surfaces effecting smooth transmission of power.

The double conical rollers effect power transmission by its rolling action. Conical rollers are freely mounted in needle bearings in the roller carrier.

The to-and-fro motion of carrier through a rack and pinion arrangement makes different diameters of the cones to come in contact with the driving and driven component resulting in infinite speed variation. These two different positions explains how speed variation is achieved.

All moving parts including bearings are continuously splashed/forced lubricated.