Measuring device for bearing pre-load

Abstract

Abstract PURPOSE:To have a high precision measurement of the pre-load applied to a rotary shaft by calculating the ratio of the load on this rotary shaft to the amount of displacement of the shaft. CONSTITUTION:A pre-load shaft 31 and a pre-load spring 34 to give this shaft 31 a downward potential are furnished above a rotary shaft 11, which is supported fast on a support table 10 and to be measured. A load sensor 36 to sense the load of this pre-load sensor 34 and a displacement measuring instrument 19 to sense the amount of displacement of the rotary shaft 11 displaced in compliance with the load are furnished, and the ratio DELTAx/DELTAf of the change DELTAx of displacement to the change DELTAf of load is calculated by entering these values of load and change into an operational device 22 through an A/D converter 39 to obtain the amount corresponding to half the load when said ratio has changed abruptly as the internal pre-load of the bearing. The relation between this value and DELTAx/DELTAf is displayed on a diaplay.

Inventors

• 👤 Masaki Chokai
• 👤 正樹 鳥海

Bibliographic Details