| 摘要 |
<p>A centrifugal clutch includes a rotatable drum having a circularly cylindrical inside surface; a plurality of shoes, each shoe having an external engagement surface for frictionally contacting the inside surface of the drum, each shoe being coupled to a rotatable hub for rotation therewith when the hub rotates concentrically with the drum, movement being permitted of each shoe radially inwardly and outwardly relative to the drum; a rigid shoe member of each shoe having a radially inwardly projecting first lock portion and a radially outwardly projecting second lock portion circumferentially spaced from the first lock portion; and a plurality of compression springs, at least one of the compression springs being positioned for compression between the first and second lock portions of adjacent ones of the shoes for biasing the shoes in a direction radially inwardly from the inside surface of the drum, the combination of the springs and the lock portions locking the shoes from moving radially outwardly more than a predetermined distance beyond contact with the inside surface of the drum for preventing separation of the shoes in the event of axial disengagement or structural failure of the drum.</p> |
