| 摘要 |
<p>PURPOSE:To eliminate backlash in the radial and thrust directions by supporting both outside ends of a bearing by both taper portions of a shaft which has a diameter smaller than the inside diameter of a bearing and has a taper portion increasing in diameter on the shaft end and a bearing pressing member urged in the expanding direction, which has a vertically split groove which can decrease the diameter in the reverse taper manner. CONSTITUTION:A taper portion 6a increasing in diameter in the anti-insert direction is provided on a shaft 6 having a diameter a little smaller than shaft insert holes of bearings 4, 5, and a taper portion 7a, the minimum diameter of which is smaller than the shaft insert hole diameter of the bearing 5 and a bearing pressing member 7 where a vertically split groove 7d which can decrease the diameter is formed are provided. The bearing pressing member 7 is urged by a coiled spring 10, so that both outside ends of the inside diameters of the bearings 4, 5 are supported by both taper portions 6a, 7a. Accordingly, backlash in the thrust and radial directions can be prevented.</p> |
