Abstract: A gearbox assembly for an electric power assisted steering assembly comprises a gearbox housing (20), an output shaft (23), a wheel gear assembly (22) comprising a hub (21) which is fixed to the output shaft by a locating means so as to prevent relative rotational and axial movement between the hub and the output shaft and a gear wheel fixed to the hub, at least one support bearing assembly (25,26) which supports the output shaft relative to the gearbox housing (20), a worm gear which engages the wheel gear (22), and a coupling for transmission of torque from the output shaft to an intermediate shaft that is external to the gearbox housing. The coupling includes a fixing part (31) which is fixed to the output shaft (23) through the gear assembly and the support bearing assembly is provided on the opposite side of the gear assembly (22) to the coupling (31) such that the gear assembly (22) is overhung from the portion of the output shaft supported by the bearings (25,26).

Abstract: A gearbox assembly for an electric power assisted steering assembly comprises a gearbox housing (20), an output shaft (23), a wheel gear assembly (22) comprising a hub (21) which is fixed to the output shaft by a locating means so as to prevent relative rotational and axial movement between the hub and the output shaft and a gear wheel fixed to the hub, at least one support bearing assembly (25,26) which supports the output shaft relative to the gearbox housing (20), a worm gear which engages the wheel gear (22), and a coupling for transmission of torque from the output shaft to an intermediate shaft that is external to the gearbox housing. The coupling includes a fixing part (31) which is fixed to the output shaft (23) through the gear assembly and the support bearing assembly is provided on the opposite side of the gear assembly (22) to the coupling (31) such that the gear assembly (22) is overhung from the portion of the output shaft supported by the bearings (25,26).