| 摘要 |
<p>Provided is a clutch piston structure capable of reducing stress operating on an elastic seal member during rotation of a rotating shaft. The clutch piston structure is characterized by comprising: a partition wall (61) arranged between a dry multi-plate clutch (7) and a clutch piston (82) and comprising an arm through-hole (61a); an elastic seal member (88) provided on the dry multi-plate clutch (7) side of the partition wall (61), that seals between a clutch chamber (89b) on the dry multi-plate clutch (7) side and an elastic seal chamber (89a) on the arm through-hole (61a) and arm projection (822b) side, and that is elastically deformable in conjunction with the stroke action of the arm projection (822b); and a partition wall communication hole (101) provided penetrating the partition wall (61) and connecting the elastic seal chamber (89a) and a piston housing chamber (89c), at a position further on the outer diameter side than the arm through-hole (61a).</p> |
