| 摘要 |
<p>The driving pulley (10) is used in a variable-speed belt drive, which comprises, in particular, two radially converging ramps (50, 52) facing each other and coaxial to a shaft (40), one ramp (50) being rigidly attached to a movable flange (30) and the other ramp (52) being rigidly attached to the shaft (40) in spaced relationship with the movable flange (30). A plurality of sliding flyweights (60) are symmetrically disposed around the shaft (40) and radially movable between the ramps (50, 52). The improvement in the driving pulley (10) is that each ramp (50, 52) comprises a contact surface on which the flyweights (60) are in contact wherein at least one contact surface (56) is curved. Each flyweight (60) also comprises a lateral knob (62) engaged with the curved contact surface (56) for ensuring that the contact point of the sliding flyweights (60) with a curved contact surface (56) does not substantially change as the flyweights (60) slide.</p> |
