| 摘要 |
<p>The safety device for a rotary cutting tool (20) mounted on the threaded axle (14) of a drive shaft (10) by a central braked nut (141) and by at least two diametrically opposite bolts (12, 13) on a collar (11) consists of a circular dome (30) with inner surface recesses (31, 32) for the heads (121, 131) of the bolts and a central aperture (33) for the threaded axle. The aperture is larger than the central fixing nut and is fitted with a hollow plug (40) that covers the nut.</p> |
