An Electric Commercial Vehicle Power Steering System With A Globoidal Wormgearing

Abstract: An electric commercial vehicle power steering system (100) includes an input shaft (110), an electric motor (120), and a planetary gear set (130), a drive coupling(140), and an output shaft (150). A first one of a sun gear (132), a planet carrier (136), and a ring gear (138) of the planetary gear set (130) is connected to and rotatable with a rotor (122) of the electric motor (120), and a second one of the sun gear (132), the planet carrier (136), and the ring gear (138) of the planetary gear set (130) is connected to and rotatable with a first gear (142) of the drive coupling (140). A second gear (144) of the drive coupling (140) is connected to and rotatable with the input shaft (110). A globoidal worm drive (160) is arranged between the input shaft (110) and the output shaft (150). The globoidal worm drive (160) couples the input shaft (110) to the output shaft (150) such that the output shaft (150) is rotatable with the input shaft (110) via the globoidal worm drive (160).

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