Patent ID: 9242658
Filing Date: 2016-01-26
CPC Classification: B60T,B61H,F16D

Claim Text:
1. A brake device configured to impart a frictional force to a disc configured to rotate together with a wheel to thereby brake the wheel, the brake device comprising: a braking element configured to come into contact with the disc and impart a frictional force thereto; a pressing piston configured to advance and retract in a direction of pressing the braking element against the disc so as to be able to press the disc with the braking element; a pressing part configured to press the pressing piston toward the braking element; a driving shaft which has a driving side screw part threadably engaged with a piston side screw part formed in the pressing piston, and which is capable, by rotating about an axis thereof, of moving the pressing piston to a side to which the pressing piston is configured to retract from the braking element; an electric motor which is connected to the driving shaft and is capable of rotating the driving shaft about an axis thereof; a releasing mechanism configured to rotate the driving shaft to the side to which the pressing piston is configured to retract from the braking element; a switching mechanism which is capable of switching between a connected state in which the releasing mechanism and the driving shaft are connected and a separated state in which the releasing mechanism and the driving shaft are separated; and a stopper mechanism which, in the connected state, is configured to prevent rotation of the driving shaft to a side to which the pressing piston is configured to advance toward the braking element, wherein the releasing mechanism is provided with: