| 摘要 |
<p>A worm screw 1 is connected to at least one other worm screw by a flexible joint, e.g. a dual cardan joint 2, to produce a train 10. The train 10 also comprises an axle shaft 3 and bearings 4 housed in trims 5. The worm screws 1 are arranged around and engage with a crown gear (8, fig 3). This provision enables a competition of augmented number of teeth during engagement of worm wheel. The train 10 makes itself useful in crowns (8) wherein their toothing is miniature rollers because they have little resistance to workload, thus improving efficiency. The train 10 enables the use of crowns (8) with partial toothing without compromising an operating cycle of full rotation. The train 10 allows easy adjustments in settings for zero backlash. The flexible joint 2 may be a flexible shaft comprising steel cable, cords, pliable rubber etc.</p> |
