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A blade pitch controlling apparatus and an application thereof are described. The blade pitch controlling apparatus includes a centrifugal device and a blade pitch variable device, and the blade pitch variable device is arranged under the centrifugal device. The blade pitch variable device has a dow

A blade pitch controlling apparatus and an application thereof are described. The blade pitch controlling apparatus includes a centrifugal device and a blade pitch variable device, and the blade pitch variable device is arranged under the centrifugal device. The blade pitch variable device has a downward stroke that is variable by the centrifugal device according to a centrifugal force induced thereon so as to drive the blade pitch variable device to change the setting angle of the blades of the wind power generator.

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1. A blade pitch controlling apparatus, comprising: a centrifugal device; anda blade pitch variable device, which comprises:a control disk, which comprises a plurality of lifting elements and a plurality of constraining elements, which alternate each other;a setting disk, which is arranged under the

1. A blade pitch controlling apparatus, comprising: a centrifugal device; anda blade pitch variable device, which comprises:a control disk, which comprises a plurality of lifting elements and a plurality of constraining elements, which alternate each other;a setting disk, which is arranged under the control disk, the setting disk comprising a plurality of setting sections to respectively receive a plurality of blade shafts, each setting section being arranged between adjacent lifting element and constraining element, the setting disk forming a plurality of through holes for respectively receiving extension of the lifting elements and the constraining elements in a movable manner, each of the blade shafts comprising a pin having opposite first and second ends;a first spring, which is arranged between the control disk and the setting disk, the centrifugal device and the first spring being respectively positioned against opposite surfaces of the control disk;a plurality of second springs, each of which has a first end coupled to the setting disk and a second end coupled to the first end of each of the pins; anda plurality of adjustment elements, each of which is set below and in contact engagement with the first end of each of the pins, whereby when the control disk is raised to a first predetermined height, the lifting elements respectively raise the first ends of the pins, and when the control disk is lowered down to a second predetermined height, the constraining elements respectively depress downward the second ends of the pins. 2. The blade pitch controlling apparatus according to claim 1, wherein the centrifugal device comprises: a centrifugal disk, which defines a plurality of tracks; anda plurality of rollers, which are respectively and movably received in the tracks, whereby the roller are movable along the respective tracks. 3. The blade pitch controlling apparatus according to claim 1, wherein each of the lifting elements comprises a C-shape, which receives the first end of the respective pin therein. 4. The blade pitch controlling apparatus according to claim 1, wherein each of the constraining elements comprises an inverted L-shape. 5. The blade pitch controlling apparatus according to claim 1, wherein each of the setting sections has two opposite sides in which the through holes are defined. 6. The blade pitch controlling apparatus according to claim 1, wherein each of the adjustment elements comprises a threaded bar. 7. The blade pitch controlling apparatus according to claim 1, wherein the adjustment elements are respectively encompassed by the second springs. 8. The blade pitch controlling apparatus according to claim 1 further comprising a support axle extending through the centrifugal device, the control disk, the first spring, and the setting disk. 9. A wind power generator comprising: a plurality of blades, each of which comprises a shaft, each shaft comprising a pin that has opposite first and second ends; anda blade pitch controlling apparatus, comprising:a centrifugal device; anda blade pitch variable device, which comprises:a control disk, which comprises a plurality of lifting elements and a plurality of constraining elements, which alternate each other;a setting disk, which is arranged under the control disk, the setting disk comprising a plurality of setting sections, the shafts being respectively and rotatably received in the setting sections, each setting section being arranged between adjacent lifting element and constraining element, the setting disk forming a plurality of through holes for respectively receiving extension of the lifting elements and the constraining elements in a movable manner;a first spring, which is arranged between the control disk and the setting disk, the centrifugal device and the first spring being respectively positioned against opposite surfaces of the control disk;a plurality of second springs, each of which has a first end coupled to the setting disk and a second end coupled to the first end of each of the pins; anda plurality of adjustment elements, each of which is set below and in contact engagement with the first end of each of the pins, whereby when the control disk is raised to a first predetermined height, the lifting elements respectively raise the first ends of the pins, and when the control disk is lowered down to a second predetermined height, the constraining elements respectively depress downward the second ends of the pins. 10. The wind power generator according to claim 9, wherein the centrifugal device comprises: a centrifugal disk, which defines a plurality of tracks; anda plurality of rollers, which are respectively and movably received in the tracks, whereby the roller are movable along the respective tracks. 11. The wind power generator according to claim 9, wherein each of the lifting elements comprises a C-shape, which receives the first end of the respective pin therein. 12. The wind power generator according to claim 9, wherein each of the constraining elements comprises an inverted L-shape. 13. The wind power generator according to claim 9, wherein each of the setting sections has two opposite sides in which the through holes are defined. 14. The wind power generator according to claim 9, wherein each of the adjustment elements comprises a threaded bar. 15. The wind power generator according to claim 9, wherein the adjustment elements are respectively encompassed by the second springs. 16. The wind power generator according to claim 9 further comprising a support axle extending through the centrifugal device, the control disk, the first spring, and the setting disk.