| 摘要 |
PURPOSE:To make adjustment of preload on a bearing and measurement of drag torque easy by providing a preloading device which is screwed on an end part of an input shaft to give preload on the first roller bearing through an inner race of the second roller bearing. CONSTITUTION:A spherical bearing 90 and a conical roller bearings 86, 87 are pressed against a flange 72 by tightening a nut 93 around an end part outer peripheral part 74 of a shaft member 70. As an outer race of the conical roller bearing 87 is prevented from its movement by the flange 72, a shear load of the conical bearings 86, 87 is increased as the nut 93 is tightened. Then, the torque is detected by laying a measuring instrument on an output gear 52 at an appropriate timing to stop turning the nut 93 when it reaches a prescribed load. Afterwards, one tooth of a baffle member 94 is bent into a root between two teeth 95 of the nut 93 to prevent the nut 93 from loosening. Being thus constituted, preload can be easily adjusted. |
