| 摘要 |
<p>A low cost clutch piston (1), which is made capable of applying large operation force to a multiplate clutch (4) by making the outer diameter (D B ) of a pressure receiving surface of the clutch piston (1) larger than the diameter of a clutch pressing section (16), is provided. The clutch piston (1) is provided with a piston body (10) that is movably inserted in a cylinder (2) so as to be movable in the axial direction and with an inner peripheral seal lip (21) andanouterperipheral seal lip (22) that are integrally arranged on the inner periphery and the outer periphery of the piston body (10) and are made to be slidably in close contact with an inner tube section (2a) and an outer tube section (2b) of the cylinder (2). The piston body (10) has the clutch pressing section (16) for pressing the multiplate clutch (4). The clutchpressing section (16) is formed to bend to the inner periphery side through a tapered section (15) that extends with inclination from an outer periphery circular tube section (14) of the piston body (10) to the inner periphery side.</p> |
