Seat understructure for motor vehicle, has crossbeam extending between slides along transversal direction, motor carried by crossbeam, and transmission chains rotationally driving screw, where crossbeam is directly fixed to case

摘要

The understructure (5) has slides (6) comprising a mobile profile (7) and a fixed profile (8) slidingly mounted with respect to each other along a longitudinal direction (X). An adjusting mechanism has a screw rotatively mounted on a case. A crossbeam (70) extends between the slides along a transversal direction (Y) that is perpendicular to the longitudinal direction. A motor (60) is carried by the crossbeam, and transmission chains rotationally drive the screw. The crossbeam is directly fixed to the case.