Patent ID: 8070238

Claim:
An electro mechanical brake apparatus comprising: a carrier, a caliper supported by the carrier, and having an external brake pad and an inner brake pad respectively pressable toward an external braking surface and an inner braking surface of a disc rotor rotating together with a wheel, a motor for generating a rotation torque, and a conversion mechanism for pressing the brake pads of the external side and inner side to the disc rotor based on the rotation torque, and a control circuit portion fixed to the caliper and provided with a metallic case on the one side thereof, a resinous interface module on another side thereof adjacent the caliper in which through-holes are arranged and sized to provide passage of air for pressure adjustment relative to ambient pressure while preventing water infiltration into the metallic case, and a resinous inner case disposed between the metallic case and the resinous interface module, wherein the metallic case has a concavity, and the resinous interface module is configured to cover the metallic case concavity to define a space in which a control board with a control circuit for controlling rotation torque of the motor and a power module having an inverter element are fitted to the inner case so as to be shielded from heat generated upon actuation of the caliper, and the power module is disposed in the concavity adjacent the metallic case, the metallic case has a stationary heat-dissipation surface disposed opposite an inner face of the metallic case to dissipate heat generated by the power module, the control board is disposed in the concavity adjacent the resinous interface module, a wiring arrangement for connecting the control board and the power module is buried in the resinous interface module, the power module is controlled by a control signal outputted from the circuit of the control board for controlling the motor rotation torque and, based on rotation torque generated by the motor and the conversion mechanism, the external and inner side brake pads being are operative to press against the respective braking surface of the disc rotor.