Worm and wheel speed reduction gear - has steel balls running in track tubes and grooves between teeth to reduce friction

摘要

The power loss due to friction in a worm and wheel transmission is reduced by arranging steel balls to roll between the meshing surfaces of the drive. The wheel has a number of equally spaced holes near its periphery with their axes parallel to the axis of rotation. C shaped tubes pass through these holes and form tracks for balls. The ends of the tube abut against the bottom of the helical grooves in the worm. The C-tubes and worm grooves thus form a continuous track so that the balls can circulate continuously as the worm and wheel rotate.