| 摘要 |
<p>PURPOSE:To improve holding strength and flexibility by fixing the external circumference of seal plate made of resin film to the opening circumference of a recessed part to accommodate a roller weight formed on the reverse side of a movable pulley half body of a driving pulley, and providing the internal circumference close to a pulley shaft in the structure of a scooter type motorcycle or the like. CONSTITUTION:A driving pulley 31 is formed by a fixed pulley half body 31a fixed to a crank shaft 26 and a movable pulley half body 31b which is movable in the axial direction. A recessed part 31d is formed on the reverse side of the movable half body 31b, an accommodating chamber 36a of a roller weight 36 is formed by the recessed part and a cam plate 35 fixed to the crank shaft 26. An external circumference part 37a of a seal plate 37 made of resin film is fixed to the opening circumference part of the recessed part 31d, and the inner circumference 37b is positioned close to the crank shaft 26, preventing outward splash of lubricating oil in the accommodating chamber 36a.</p> |
