ELECTRIC VEHICLE BRAKING DEVICE

摘要

The electric braking device is provided with: a pressing member, which has a thread portion with either an internal thread or an external thread and which applies a pressing force on a frictional member; a shaft member, which is rotated by an electric motor and is threadedly engaged with the thread portion; a first spherical surface member, which is separated from the shaft member, being capable of rotating relative to the shaft member around the axis of rotation of the shaft member, and the end surface of which is a spherical surface; and a second spherical surface member, which is in sliding contact with the spherical surface of the first spherical surface member, receives the reaction force of the pressing force, and is restrained from rotating with respect to the axis of rotation of the shaft member.

主权项

1. An electric vehicle braking device that presses a frictional member onto a rotational member fixed to a wheel of a vehicle by means of an electric motor to generate a braking torque on the wheel, the electric vehicle braking device comprising:
a pressing member that has a thread portion, which is either a nut-corresponding portion or a bolt-corresponding portion, and applies a pressing force to the frictional member; a shaft member that is rotated by the electric motor, and is threadedly engaged with the thread portion; a first spherical surface member that is separated from the shaft member and relatively rotatable around an axis of rotation of the shaft member with respect to the shaft member, and has a spherical surface, and a second spherical surface member that is in sliding contact with the spherical surface of the first spherical surface member, and receives a reaction force of the pressing force, being restrained from rotating around the axis of rotation of the shaft member.