| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a clutch piston mechanism for using a material having strength lower than that of a conventional material, satisfy demand performance, even when thickness is decreased, and be reduced in a cost and weight. SOLUTION: A stress dispersion part, consisting of recessed parts 19a and 19b or a thin thickness part, is formed closer to the central shaft C side than a press part 11 against a clutch plate 8a situated near the outer edge of a clutch piston 1. By intentionally concentrating a stress to the part, a maximum stress generated at a stress concentration spot due to the characteristics of the clutch piston 1 from the viewpoint of a shape is decreased, and pressure resistance is improved.</p> |
