Patent ID: 7066709

Claim:
A wind driven power generating system of single-rotor type in which a horizontal and vertical shafts are combined, the wind driven power generator comprising: a) an aerodynamic unit rotatably mounted at the top of a tower having a certain height; b) a plurality of rudders for aligning the aerodynamic unit with the direction of wind, the rudders being radially formed on the outer surface of the aerodynamic unit; c) a horizontal shaft rotatably and horizontally mounted in the aerodynamic unit, wherein one end of the horizontal shaft is projected outwardly from a back end of the aerodynamic unit and the other end of the horizontal shaft remains inside of the aerodynamic unit and is provided with a first bevel gear; d) a blade attached to rear end of the horizontal shaft, wherein the blade is rotated by the wind and thus rotates the horizontal shaft; e) blade variation means disposed at rear portion of the aerodynamic unit for slanting the blade backwards and forwards, depending on the wind pressure; f) a power generator installed inside the tower; and g) a vertical shaft for transmitting the rotating power of the horizontal shaft to the power generator, wherein one end of the vertical shaft is provided with a second bevel gear, which is engaged with the first bevel gear, and the other end thereof is connected to a rotor shaft of the power generator, wherein the blade variation means comprises; i) a hub mounted on the horizontal shaft, the hub rotating with the horizontal shaft; ii) a plurality of first link bars provided to the outer peripheral surface of the hub, wherein one end of each link bar is connected to the root of the blade, and the other end of each link bar is pivotably connected to the hub such that the fist link bars and the blades can be rotated about the horizontal shaft while being slanted backwards and forwards; iii) a sliding sleeve slidably mounted on the horizontal shaft, the sliding sleeve being positioned backwards relative to the hub in such a manner as to be spaced apart from the hub; iv) a spring fit around the horizontal shaft between the sliding sleeve and a spring stopper provided at the rear end of the horizontal shaft, for providing a restoring force; and v) a plurality of second link bars for connecting the first link bars to the sliding sleeve in such a manner that one end of each second link bars is pivotably connected to an associated one of the first link bars and the other end thereof is pivotably connected to the sliding sleeve.