| 主权项 |
1. A vehicle electric braking device configured to press a friction member using an electric motor against a rotation member fixed to a wheel of a vehicle, to thereby generate a braking torque for the wheel,
the vehicle electric braking device comprising: a pressing member configured to press the friction member against the rotation member, the pressing member including a first cylindrical part on an inner periphery thereof; a shaft member to be rotationally driven by the electric motor, the shaft member including, on an outer periphery thereof, a second cylindrical part overlapping the first cylindrical part in an axial direction of the shaft member; a screw member configured to convert a rotational motion of the shaft member into a translational motion of the pressing member; a cap member that is brought into slide contact with the first cylindrical part on an outer periphery of the cap member so that the cap member is relatively movable in an axial direction of the pressing member with respect to the pressing member, and is brought into slide contact with the second cylindrical part on an inner periphery of the cap member so that the cap member is relatively movable in the axial direction of the shaft member with respect to the shaft member, wherein the cap member being relatively rotatable about an axis of the shaft member with respect to at least one of the first cylindrical part or the second cylindrical part; and a storage chamber partitioned by the first cylindrical part, the second cylindrical part, and the cap member, connected to one end of the screw member, and filled with a lubricant for lubricating the screw member. |
