Steering gear apparatus of rack-and-pinion type

摘要

A steering gear apparatus of the rack-and-pinion type including a pinion (11) formed with helical teeth (11a) and a rack member (15) formed with helical teeth (15a) which are brought into meshing engagement with the helical teeth of the pinion in such a manner that a steering effort is applied to the meshed portion of the helical teeth (11a, 15a) of the pinion and rack member at a predetermined angle relative to an axis line of the rack member (15), the rack member being resiliently biased toward the pinion, wherein the helical teeth (11a or 15a) of the pinion (11) or the rack member (15) each are formed with a tip portion (11a1) to be brought into engagement with each root (15a1) of the helical teeth of the rack member or the pinion.