ELECTROMECHANICAL STRUT WITH MOTOR-GEARBOX ASSEMBLY HAVING DUAL STAGE PLANETARY GEARBOX

摘要

An electromechanical strut is provided for moving a pivotal closure member between an open position and a closed position relative to a motor vehicle body. The electromechanical strut includes a drive mechanism having a motor-gearbox assembly that is operable to drive a rotatable power screw. The drive mechanism converts rotary motion of the power screw into linear motion of an extensible member to move the extensible member between a retracted position corresponding to the closed position of the closure member and an extended position corresponding to the open position of the closure member. The motor-gearbox assembly includes a gearbox unit equipped with a dual-stage planetary geartrain that is operably disposed between a motor output and the power screw. The dual-stage planetary geartrain includes a first stage gearset and a second stage gearset sharing a common ring gear.

主权项

1. An electromechanical strut for moving a pivotal closure member between an open position and a closed position relative to a motor vehicle body, the electromechanical strut comprising:
a housing connected to one of the closure member and the motor vehicle body; an extensible member slideably moveable relative to the housing and connected to the other one of the closure member and the motor vehicle body; and a drive mechanism operable for converting rotary motion of a drive member into linear motion of the extensible member for moving the extensible member between a retracted position relative to the housing which corresponds to the closed position of the closure member and an extended position relative to the housing which corresponds to the open position of the closure member, the drive mechanism including a motor-gearbox assembly having an electric motor unit and a gearbox unit, the electric motor unit having a rotary output member, the gearbox unit having a dual-stage planetary geartrain with an input component coupled to the output member of the electric motor unit and an output component coupled to the drive member, wherein the dual-stage planetary geartrain includes a first stage gearset having a plurality of first planet gears and a second stage gearset having a plurality of second planet gears, wherein said first and second planet gears are meshed with a common ring gear.