Patent ID: 6761660
Filing Date: 2004-07-13
Classification: F16H

Abstract:
A transmission planetary gear structure, comprising:a frame body with an internal gear formed on the frame body; an input shaft provided with an insertion space therein and a toothed gear on an peripheral surface of the input shaft for power source connection; a plurality of first planetary gears operably engaging with the toothed gear of the input shaft; a plurality of crank structures, wherein each crank structure is equipped with both a number of coaxial lines having the identical axis and a number of eccentric components which, located between the coaxial lines, have a predetermined eccentric amount but with phase differences from the central axis to each other, and wherein, an end of the coaxial lines being connected to the first planetary gears, a plurality of the coaxial lines translate and rotate by the rotary movement of the first planetary gears; a plurality of second planetary gears, which is formed along the outer circumferential surface and engages with the internal gears of the body, wherein formed is a central hole that the input shaft penetrates in the center, and the eccentric components of the crank structures pass through a circumferential portion and the second planetary gears conduct translation and rotation to the rotary movement of the crank structures; a precession prevention plate with a central hole penetrated by the input shaft, wherein the coaxial lines at the crank structures of the back end penetrate the circumferential portion so that they are connected, and the generation of the precession is prevented while the crank structures rotate; and an output shaft plate with a central hole penetrated by the input shaft, of which the circumferential portion is combined to the coaxial lines at the front end of the crank structures, and conveys the rotary power of the crank structures.