Improved electro-hydraulic actuator for brake

An electro-hydraulic actuator for actuating a brake caliper, in particular a disc brake of a vehicle with two or more wheels, comprising:

• an electric motor with a drive shaft;
• a transforming mechanism connected to the drive shaft to transform a rotary motion of the drive shaft into a translational motion of a translatable portion configured to act on a hydraulic master cylinder of said brake;
• a first housing configured to accommodate the transforming mechanism and support a second housing of the electric motor, said transforming mechanism including a reduction gear configured to demultiply the rotary motion of the drive shaft, said reduction gear comprising a crown with inner toothing in one piece and rotationally locked,
• wherein
• said crown with inner toothing comprises a front portion directly shape-coupled to and inserted in the second housing of the electric motor and a connection integral with the first housing of the transforming mechanism so as to achieve a precise centering between the electric motor and the reduction gear with respect to the axis of the drive shaft and with respect to a central axis of the reduction gear.