Rack and pinion window regulator

摘要

A door for an automotive vehicle has an inner metal stamping and an outer metal stamping that are secured together along a perimeter to form a shell that includes an upper window frame and a lower hollow body and a window regulator that is part of a window module that is assembled to the shell. The window module includes a structural belt beam, a drive assembly, a rack, a window pane and a window guide channel. The window guide channel has a front run, a header and a rear run, the window guide channel being attached to structural belt beam so that the front run is attached to a forward end of the belt beam and the rear run is attached to a rearward end of the belt beam. The window pane has a front edge that travels in the front run and a rear edge that travels in the rear run. The rack is disposed in the rear run and attached to the rear edge of the window pane. The drive assembly is mounted in a rearward end portion of the structural belt beam by a bracket that supports a reversible electric motor. A pinion gear that is secured to an output shaft of the reversible electric motor meshes with the rack so that the window pane is raised and lowered by the reversible electric motor. The rack is made of a glass reinforced plastic and the pinion gear is made of a plastic coated powered metal to reduce noise and friction.