Patent ID: 7481307
Filing Date: 2009-01-27
Classification: B60K,F16D

Abstract:
1. A torque transmission apparatus comprising: a clutch unit configured to receive thrust and transmit torque between rotary members; a differential screw mechanism configured to convert rotational force into the thrust applied to the clutch unit; a rotational actuator configured to produce the rotational force; the differential screw mechanism having a driving screw and a driven screw that arc each rotatably supported, the driving screw being driven by the rotational actuator to rotate; each of the driving screw and the driven screw having a threaded portion; the threaded portions meshing with each other to gear the driven screw to the driving screw so that the driven screw is rotated by the driving screw to rotate; and the threaded portions having different diameters from each other so that one of the driving screw and driven screw axially moves relative to another one of the driving screw and driven screw to convert the rotational force of the actuator into the thrust which is applied by relative axial movement of the driving screw and the driven screw.