PLANETARY GEAR REDUCER HAVING VIBRATION PREVENTION PLANETARY GEAR

摘要

A planetary gear reduction mechanism having vibration prevention planetary gear is provided to offset the vibration due to the rotation of the planetary gear by rotating the vibration prevention planetary gear which is positioned symmetrical with the planetary gear. A planetary external gear(12) goes in gear with a vibration prevention external gear(16). A internal gear(21) is installed in a planetary gear case(20) in order to rotate a planetary gear(10) and a vibration prevention planetary gear(15). A vibration prevention cam(33) is formed in the input shaft in order to rotate the vibration prevention planetary gear. A vibration prevention gear bearing(17) is inserted between the vibration prevention cam and vibration prevention planetary gear. The vibration prevention external gear is formed at the vibration prevention planetary gear.