A gearbox assembly for an electric power assisted steering system. The gearbox assembly includes a housing, a worm shaft, and a gear wheel, the worm shaft being supported relative to the housing by a main bearing assembly and a tail bearing assembly. The tail bearing assembly at least is free to move relative to the housing, allowing the worm shaft to move radially away from the axis of the gear wheel. The worm shaft is enables to move normal to the worm shaft axis such that it can move in and out of meshing contact with the gear wheel. The assembly further includes a gripping means that acts between the tail bearing assembly and the housing such that torque transmitted through the gear wheel generates a friction force that locks the tail bearing assembly to prevent movement of the worm shaft normal to the worm shaft axis that would otherwise occur.
Gearbox assembly for an electric power steering apparatus
2020-11-03
Patent
Electronic Resource
English
Gearbox assembly for an electric power steering apparatus
European Patent Office | 2023
|GEARBOX ASSEMBLY FOR AN ELECTRIC POWER STEERING APPARATUS
European Patent Office | 2023
|Gearbox assembly for an electric power steering apparatus
European Patent Office | 2023
|