| 摘要 |
PURPOSE:To prevent a tapered fitting part from being loosened and slipped or to prevent a tapered sleeve from being damaged, by mounting a resilient fixed pre-load member, which absorbs the displacement of thermal expansion and contraction of the tapered sleeve, to be interposed between a unit and the tapered sleeve. CONSTITUTION:A tightening device, mounting a belleville spring 16 to be interposed between a nut 4 and the rear end surface of a tapered sleeve 3, gives a fixed pre-load to the tapered sleeve 3. As a result, the device presses the tapered sleeve 3, when it performs thermal expansion, in a tightening direction by the fixed pre-load pressure due to the belleville spring 16, holding a regular tapered fit. While the device displaces the tapered sleeve 3, when it contracts, in a loosening direction by compressing the belleville spring 16 through a tapered surface fit with a tapered external diameter 1a. |
