A rotary shifter for an automatic transmission is disclosed. The rotary shifter has two rack-and-pinion assemblies in the same axle, which is rotatable by a knob. The rack-and-pinion assemblies are aligned to move the same gear cable, but the teeth positions are different on both assemblies. The dual rack-and-pinion assembly having the same actuating direction ensures that the rotary shifter action remains free from slack movement. A pressing member for exerting a force between the pinion and the rack may be used to further improve the action. The pressing member improves the contact between the rack and the pinion. Having different teeth positions on the aligned racks ensures that the pinion teeth, while configured to interact with the respective racks, are in contact with rack teeth with alternate positions on the respective racks.
ROTARY SHIFTER
18.02.2021
Patent
Elektronische Ressource
Englisch