| 摘要 |
<p>The working sand for electrical Do-It-Yourself machines has a tool holder (3), with a gear wheel and crank handle, mounted to a vertical column (2) with a rack (5). A spindle (8) carries a gearwheel and is surrounded by a spiral torsion spring. One end of the spring is secured to the tool holder (3), the other end to a bush (17) which can be locked to the shaft. At the shaft end opposite the crank handle end, the shaft has a screw thread which carries a locking nut (14) to clamp with its inner face the bush onto the shaft shoulder.</p> |
