Steering device
AssigneeKnorr-Bremse Commercial Vehicle Systems Japan Ltd.
InventorsHiroki Saito, Shinji Nakamura
Life of this patent
Estimating the term…
Abstract
A steering device includes: a steering shaft; a transmitting mechanism configured to transmit the rotation of the steering shaft to a steered wheel; a power cylinder; a rotary valve configured to selectively supply a hydraulic fluid to the pair of the fluid chambers in accordance with the rotation of the steering shaft; and an electric motor configured to provide a rotation force through a speed reduction device to the steering shaft, the steering shaft including a first shaft connected to the steering wheel, and a second shaft connected to the first shaft, and configured to output the rotation force inputted from the first shaft, to the transmitting mechanism side, and the electric motor being connected through the speed reduction device to the second shaft.
Claims13
A steering device comprising:
- a steering shaft configured to receive a rotation force from a steering wheel;
- a transmitting mechanism configured to transmit the rotation of the steering shaft to a steered wheel;
- a power cylinder which includes a piston provided in the transmitting mechanism, and a pair of fluid chambers defined by the piston, and which is configured to provide a steering force for turning the steered wheel;
- a rotary valve configured to selectively supply a hydraulic fluid to the pair of the fluid chambers in accordance with the rotation of the steering shaft;
- an electric motor configured to provide a rotation force through a speed reduction device to the steering shaft;
- and
- the speed reduction device including a worm shaft and a worm wheel,
- the steering shaft including a first shaft connected to the steering wheel, and a second shaft connected to the first shaft, and configured to output the rotation force inputted from the first shaft, to the transmitting mechanism side,
- the worm wheel being fastened to the second shaft, and
- the second shaft constituting the rotary valve.
Dependencies are inferred from the claim text.