| 摘要 |
<p>PURPOSE:To aim at simplification of a converting mechanism for transmission torque by causing the length of a clutch spring to expand and contract through the vertical motion of a clutch gear which is made between the No.1 and No.2 positions in the direction of rotation of a clutch disc so that the clutch transmission torque is hereby made convertible. CONSTITUTION:A metallic sleeve 2 is pressed into the boss part 1a of a clutch disc 1, to whose surface a clutch felt 3 is glued, and at the same time, a thrust stopper 4 is pressed into the tip of said boss part 1a. In addition, arc-shaped cam protrusions 21a-21c, having a rising gradient respectively, are provided on the central part of the surface of said metallic sleeve 2 within the range of a swinging movement angle of 120 deg. in the counterclockwise direction, and at the same time, a scored disc 9, on whose circumferential part are provided with two engagement protrusions 9a, 9b, is fitted on the metallic sleeve 2 in such a manner that it may be free to rotate. And further, on the metallic sleeve 2 is fitted a clutch gear 6, on whose under surface are provided cam protrusions which are directed in the opposite direction so as to be engaged with said protrusions 21a-21c, in such a manner that it may be free to rotate and also free to travel in the axial direction, and the clutch gear 6 is energized downwards by means of a clutch spring 5.</p> |
