PROBLEM TO BE SOLVED: To provide a vehicle steering unit which can be easily mounted in a vehicle and can continue assistance in steering even in an abnormal state.SOLUTION: A transmission-ratio varying device 14 includes: a speed change gear mechanism 34 including a motor for relatively rotating first and second members 30, 32; a first coupling part 40 for putting an input shaft 20 and the first member 30 into a coupled state or decoupled state; a second coupling part 42 for putting the first input shaft and an output shaft 30 into a coupled state or decoupled state; a third coupling part 44 for putting the first member 30 and a vehicular body 45 into a coupled state or decoupled state. In a normal state, the input shaft 20 and first member 30 are put into a coupled state by the first coupling part 40, and the transmission-ratio varying device 14 makes a transmission ratio of the input shaft 20 and output shaft 22 variable. In an abnormal state, the input shaft 20 and output shaft 22 are put into a coupled state by the second coupling part 42, and the first member 30 and vehicular body 45 are put into a coupled state by the third coupling part 44, and a motor provides steering torque.
【課題】車両に容易に搭載でき、異常状態においても操舵のアシストを継続可能な車両操舵装置を提供する。【解決手段】伝達比可変装置14は、第1部材30および第2部材32を相対的に回転させるモータを含む変速ギヤ機構34と、入力軸20および第1部材30を連結状態または連結解除状態にする第1連結部40と、入力軸20および出力軸22を連結状態または連結解除状態にする第2連結部42と、第1部材30および車体45を連結状態または連結解除状態にする第3連結部44と、を有する。通常状態において、第1連結部40により入力軸20と第1部材30とを連結状態にし、伝達比可変装置14は、入力軸20と出力軸22の伝達比を可変にし、異常状態において、第2連結部42により入力軸20および出力軸22を連結状態にして第3連結部44により第1部材30および車体45を連結状態にし、モータで転舵トルクを付与する。【選択図】図3
VEHICLE STEERING UNIT
車両操舵装置
2015-06-04
Patent
Elektronische Ressource
Japanisch
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |