| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a gear drive transmission device reducing rotational unevenness and vibromotive force in a translational direction, and an image formation device.SOLUTION: A gear drive system includes: a drive gear that is formed on a peripheral surface on one end side of a drive shaft of a drive motor and in which the relation between the position of a bearing performing rotational support on a peripheral surface on the other end side of the drive shaft and the position of a tooth surface is a cantilevered manner; and a driven gear that is rotatably driven by the drive gear. In an attenuation area of a vibration characteristic curve indicating the relation between the frequency and the transmission characteristic of exciting force in the tooth width central part of the drive gear, an engagement frequency acquired by the product of the rotational speed of the drive gear and the tooth number of the drive gear is set.</p> |
