| 摘要 |
PURPOSE:To aim at stepping up absorption capacity in impact torque, by making up a fixed area at the side of both ends of the outer long side of a buffer aperture made in a gear into a circular form centering on the gear's center line as well as an intermediate area of the rest into a linear form. CONSTITUTION:Both short side parts 9c of a buffer aperture 9 of a buffer aperture carrying gear 4 is formed in length almost equal to the outer diameter of a buffer spring 12 while an outer long side part 9a is formed in a circular form centering on the center line of the gear 4 by only an area A corresponding to an actuating angle alpha of the buffer spring 12. And, an intermediate area S of the rest is formed in a linear form parallel with an inner long side part 9b while the actuating angle alpha is made almost equal to an angle theta. With this, absorption capacity in the buffer spring 12 can be brought into full play. |
