| 摘要 |
PURPOSE:To attain a quantity of clutch engagement corresponding to the revolution speed, by housing weight rollers in the cam grooves of a lifter plate fitted in an outer clutch member, so that the centrifugal force moves the weight rollers outwards in the radial direction and displaces them in a direction to push clutch discs. CONSTITUTION:In a clutch in which clutch discs 15 are pushed on friction discs 14 by a spring 17, weight rollers 19 are housed in the cam grooves 18a of a lifter plate 18 fitted in an outer clutch member 9. In slow driving, the pressure contact force which acts between the friction disc 14 and the clutch disc 15 consists of only the appropriately-set elastic force of the spring 17. In rapid driving, the revolution speed of a shaft 6 is so high that the rollers 19 are moved outwards in the radial direction in the cam grooves 18a and displaced in a direction to push the clutch discs 15, thus heightening the pressure contact force between the friction disc 14 and the clutch disc. For that reason, in straight driving, no slippage takes place between the discs 14, 15, a driven shaft 7 follows the main driving shaft 6 well and the straight driving is kept from deteriorating. |
