| 摘要 |
<p>The clutch (C) allows to alleviate the disengaging operation load, increase the clutch capacity during transmission of positive torque, and makes slight half-clutch operations possible.</p><p>The clutch comprises a clutch outer (3), a clutch inner (4) provided within the clutch outer (3), a clutch center (5) arranged so as to be capable of movement in an axial direction with respect to the clutch outer (3) and the clutch inner (4), a pressed plate (8) coupled to the clutch inner (4), and a pressing plate (12) sandwiched between first and second friction plates (10, 11), and facing the pressed plate (8). The clutch center (5) is constructed so as to be capable of moving between a first position (P1) abutting with the clutch inner (4) and a second position (P2) pressing the pressing plate (12) towards a side opposite to the pressed plate (8). The clutch center (5) is urged towards the side of the second position (P2) by auxiliary springs (28) of a spring load smaller than the spring load of the clutch springs (14). A cam mechanism (30) generates a pulling force (F1) that causes the clutch center (5) to move towards the first position (P1) when a positive torque (A) acts across the clutch center (5) and the clutch inner (4).
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