| 摘要 |
PROBLEM TO BE SOLVED: To easily impart appropriate pre-load with compact, light-weight constitution by fitting a tapered shaft part of a driving shaft member to the non-conical inner peripheral surface of a first inner ring member without looseness, and pressing one axial end face of the first inner ring member by a first nut, while pressing the other axial end face of a second inner ring member by a second nut. SOLUTION: A second nut 31 is thread-fastened to a second external thread part 28 of a driving shaft member 24. A second inner ring member 23 is fitted to the periphery of a small diameter step part 25 of a first inner ring member 22, and the inner ring member 22 is fitted to the periphery of a tapered shaft part 27 of the driving shaft member 24. The inner peripheral surface of the inner ring member 22 and the outer peripheral surface of the tapered shaft part 27 are non-conical tapered faces of the same sectional shape and inclination so as to be out of relative rotation. A first nut 30 is then thread-fastened to a first external thread part 26 of the inner ring member 22 and tightened, and one axial end face of the inner ring member 22 is held down to connect and fix the inner ring member to the driving shaft member 24 without looseness. Furthermore, the nut 31 is rotated to press an inner ring member 23 with thrust load corresponding to specified torque. Appropriate pre-load can therefore be imparted easily with compact, lightweight constitution. |
