In this study, a new mechanism was designed and presented as an
alternative to the worm gear mechanism without its disadvantages. This novel
mechanism is referred to as a “ball worm gear mechanism”. The force of the worm
gear mechanism is transmitted by a sliding movement, which leads to high
operating temperature and low efficiency as well as wear on the bronze worm
wheel. Therefore, a new mechanism was designed with balls placed into the
helical grooves on the worm shaft which move by rolling on the worm wheel. The worm wheel of the newly designed
mechanism is made of case-hardened steel, which is less expensive than bronze.
Thus, it is anticipated that not only the cost of the worm wheel will be
reduced, but also its life will be extended. Greater efficiency and elimination
of the high operating temperature are expected to result from the power
transmission achieved by the rolling motion of the new mechanism. Modeling of
the design was carried out with SolidWorks software and the feasibility of the
mechanism was confirmed.
Worm gear mechanism, ball-screw mechanism, CAD, Efficiency