Patent ID: 8710693

Claim:
A power generating apparatus of renewable energy type, comprising: a rotor which comprises a hub and a main shaft, the hub having at least one blade mounted thereon, the main shaft being coupled to the hub and being configured to be rotatable together with the hub; a fastening bolt for fastening the main shaft with the hub; a generator which is configured to generate power by torque inputted from the rotor; a hydraulic transmission which is configured to transmit the torque from the rotor to the generator; a brake disc which is fixed to the rotor by the fastening bolt so that the brake disk is fastened to the hub and the main shaft; and a brake caliper which is disposed around the main shaft and which is configured to force a brake pad against the brake disc to apply a braking force to the rotor, wherein the main shaft includes an outward flange which is fastened to the hub with the brake disc, the outward flange being disposed on one end of the main shaft, wherein the main shaft extends axially opposite to the hub from a first position where the outward flange on the one end of the main shaft is fastened to both of the brake disc and the hub, toward the other end of the main shaft, wherein the brake disc is disposed around the main shaft to spread outward in a radial direction of the main shaft and extend axially opposite to the hub, from the first position to a second position where the brake caliper is provided around the main shaft, the second position being located between an axial position of the one end of the main shaft and an axial position of the other end of the main shaft, and wherein the main shaft includes an outer surface whose region between the first position and the second position in an axial direction of the main shaft is covered by the brake disc.