| 摘要 |
PURPOSE:To obtain a meshed condition close to an ideal very easily by providing a projected part which projects in the radial direction while the top part of which forms the arc of a standard pitch circle. CONSTITUTION:A first gear 12 is installed on the rotary shaft 14 of the first gear and fixed to a wall plate via a bearing 16. A projected part 20 provided on the side of the first gear 12 extends in the radial direction of the rotary shaft 14 with the rotary shaft 14 of the first gear 12 as the reference, and its top side forms the arc of a standard pitch circle 18. On the other hand, a second gear 22 is installed on a rotary shaft 24, and a projected part 38 is also provided on the side of the second gear 22, with its top side forming the arc of a standard pitch circle 36. Accordingly, by bringing these top sides into contact with each other, the standard pitch circles of both gears 12, 22 are brought into contact with each other.
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