| 摘要 |
<p>The low noise-producing gearwheels for a gear involve a first gearwheel (1) of a first material and a second gearwheel (2) of a second material loosely or firmly located next to each other on a common shaft. The elasticity of the first gearwheel, preferably made of plastic, is greater than that of the second gearwheel, preferably made of metal and the strength of the second gearwheel is greater than that of the first. The second gearwheel has slightly fewer teeth than the first gearwheel, but in normal operation only the first gearwheel comes into engagement with another gearwheel. With greatly increasing load, the first plastic gearwheel gives way, so that then also the second metal gearwheel comes into engagement in order to take up the occurring forces, thereby protecting the first gearwheel from overload and breakage.</p> |
