| 摘要 |
PURPOSE: A planetary gear reduction apparatus of an internal type is provided to be made small maintaining an improved continuity and accuracy of power transmission. CONSTITUTION: A planetary gear reduction apparatus of an internal type comprises : a body(410) to include an inscribed gear ; an input shaft(110) to form the inserting space connect a power source and the tooth-shaped surface(112) on the outer circumference face of the rear ; several first planetary gear(210) to be connected with the tooth-shaped surface(112) of an input shaft(110) ; several crank shafts(310) to be connected with the first planetary gear(210), to be rotated by rotary motion of the first planetary gear(210), and to include several same axis parts(316) and several eccentric parts(314) ; several second planetary gear(320) to form a gear with the outer circumference face and a central hole piercing an input shaft(110), and to be rotated by rotary motion of a crank shaft(310) ; a plate of preventing precession(510) to form a central hole piercing an input shaft(110), to pierce a same axis part(316) of the rear of a crank shaft(310), and to prevent a generation of precession when to rotate a crank shaft(310) ; an output shaft plate(610) to transmit the rotary power of a crank shaft(310).
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