| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the number of part items of an oil pressure canceling chamber, and enhance airtightness of the oil pressure canceling chamber. SOLUTION: This low-high speed switching device 1 is provided with a piston 18, a clutch case 15, a clutch part 17, an oil pressure chamber 19 and a return spring 20. The piston 18 is an annular member. The clutch case 15 is provided with an inner peripheral cylindrical part 15b and an outer peripheral cylindrical part 15f for supporting the inner periphery and the outer periphery of the piston 18 to house 18. The clutch part 17 is arranged on the first shaft directional side of a piston support part. The oil pressure chamber 19 is arranged on the second shaft directional side of the piston 18. The return sprig 20 is arranged on the first shaft directional side of the piston 18 to energize the piston 18 to the second shaft directional side, and is an annular disk-like member for forming 21 between the return spring 20 and the piston 18.</p> |
