| 摘要 |
<p>A worm gearbox comprising a one-piece casing (1) closed by a cover (2). A gearwheel (3) is mounted in the housing for rotation about a first axis and a worm shaft (4) meshes with the gearwheel and is mounted in a pair of bearing assemblies (5) for rotation about a second axis at 90 degrees to the first axis. A portion of the worm shaft (4) protrudes from one side of the casing (1) through a side aperture (8). Each bearing assembly (5) comprises a bush which is preferably made of a sintered metal material and wholly received in the casing, the bush being located therein so that all the radial and axial worm shaft loads are carried by the one-piece casing, the cover (2) retaining all the components in the casing. Preferably, the side aperture (8) is shaped to allow a sub-assembly including the worm shaft (4) with the bearing assemblies (5) fitted thereto to be inserted into the casing in a direction at 90 degrees to the axis of rotation of the worm shaft.</p> |
