"蜗轮减速机" can be translated into English as "worm gear reducer" or "worm reduction gearbox".
"Worm gear reducer" is a commonly used term in mechanical engineering, directly indicating the type of gear (worm gear) and its function (reducer).
"Worm reduction gearbox" emphasizes the gearbox structure while still conveying the reduction purpose, with "worm" specifying the type of gear involved.
Both translations are accurate and widely accepted, depending on the context or preference.