ECCENTRIC QUANTITY VARIABLE DEVICE

PURPOSE:To vary continuously the eccentric amt. of a main rotary shaft and crank shaft by independently rotating a subordinate rotary shaft by making the center of the subordinate rotary shaft pivotally supported on the main rotary shaft and the crank shaft center formed on the subordinate rotary shaft end eccentric by the specified amt. against the centers of the main rotary shaft and subordinate rotary shaft. CONSTITUTION:The center O of a main rotary shaft 10 and the center O1 of a subordinate rotary shaft 12 are deviated by a distance (e) and the center O1 of the subordinate rotary shaft and the center O2 of the crank shaft 14 integrally formed on the subordinate rotary shaft 12 are deviated by the same distance (e). At the time when the center O of the main rotary shaft 10 and the crank shaft 14 center O2 are located at the position apart by 2e the crank shaft 14 is rotated with the max. eccentric amt. against the main rotary shaft 10. The subordinate rotary shaft 12 is then rotated by an angle theta if the rotation of a servomotor 72 is controlled and the relative speed of the main rotary shaft 10 and sub-rotary shaft 12 is varied. With the further variation of the relative speed the main rotary shaft 10 center O and the center O2 of the crank shaft 14 coincide with, the eccentric amt. of the main rotary shaft 10 and crank shaft 14 becomes zero and the eccentric amt. can be continuously varied in the max. and min. amt. in the specified range.