GEAR MOTOR, IN PARTICULAR FOR DRIVING THE ARMS OF A MOTOR-VEHICLE WINDSCREEN WIPER

The invention relates to a motor-reducer for driving wiper arms of a motor vehicle, comprising: - a driving shaft (14), - a driven shaft (17), - a gear transmission between the driving shaft (14) and the driven shaft (17), comprising: o a first worm gear (14a) integral with the driving shaft (14), o a first intermediate pinion (20) having a first and a second toothing (20a, 20b), the first toothing (20a) of the first intermediate pinion (20) meshing with the first worm gear (14a), o a driven wheel (40) integral with the driven shaft (17) having an output toothing (41), meshing with the second toothing (20b) of the first intermediate pinion (20), characterized in that the output toothing (41) of the driven wheel (40) and the second toothing (20b) of the first intermediate pinion (20) are shaped such that two opposite flanks (42a, 42b) of a tooth (43) of the output toothing (41) of the driven wheel (40) meshing with the second toothing (20b) of the first intermediate pinion (20) are in contact with the second toothing (20b) of the first intermediate pinion (20).