Vehicle electronic mechanical brake actuator

The utility model discloses a vehicle electronic mechanical brake actuator, passing through fastening screw including the motor housing body with harmonic speed reducer ware circular spline and support and being connected, the support passes through lock nut and stopper pincers body fixed connection, the power of motor passes through the motor shaft and transmits the ware for harmonic speed reducer, and the flexbile gear teeth of a cogwheel of major axis both ends department insert harmonic speed reducer ware circular spline gear inslot, flexbile gear and ball's screw nut passes through fastening screw hookup transmission moment of torsion, and the last recess that is equipped with of screw nut, support have clearance fit in protruding this recess of embedding, have the feather key between ball and the support, the support contacts with ball's left end, and ball connects gradually sharp ejector pad, drag friction piece, brake disc, brakeing the sassafras piece that rubs and installing in the draw-in groove of the stopper pincers body, the brake disc is fixed with the hub for vehicle wheel, and sharp ejector pad is installed in the stopper clamps the cavity of the body. Simple structure is compact, has good brake performance.