| 摘要 |
PURPOSE:To enable gears to mesh with each other always in a pitch circle and to avoid troubles such as uneven feed, abrasion of gears due to slippage of engagement by providing cylinders having pitches circle diameters on the side surfaces of a second gear and a third gear. CONSTITUTION:A first gear 1 is rotated in the direction of an arrow (k), and a second gear 2 is moved in the direction of the arrow (n) by the action of a disc spring 11 to be meshed with a third gear 3. At this time, a cylinder 2-b having a pitch circle diameter solidly formed on the side of the second gear 2 and a cylinder 3-b having a pitch circle diameter solidly formed on the side of the third gear 3 are rotated in collided contact, whereby the tooth form portion of the second gear 2 and the tooth form portion of the gear 3 are meshed with each other properly in the second pitch circle 9 and the third pitch circle 10, and when the second gear 2 is rotated in the direction of an arrow (l), the third gear 3 is rotated in the direction of an arrow (m). Then, the gears 2, 3 are meshed with each other in pitch circles 9, 10 so as to avoid troubles such as uneven feed, abrasion and so on due to slippage of engagement. |
