LAGERUNG EINER SCHNECKENWELLE

摘要

In 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.