SPEED REDUCER WITH ANTI-BACKLASH BEARING

摘要

A two-stage speed reducer of the type making use of cycloidal cams particularly for motion control applications where the elimination of backlash is important. The two stages include sections that are rotatable with respect to each other and any axial or radial movement between the two stages would be a source of backlash. A first annular bearing surface is provided on one stage having V-shaped cross section with the apex of the V directed outwardly. The other stage carries a second similar V-shaped bearing surface in face-to-face relationship with the first bearing surface. Anti-friction means, such as a layer of teflon, is interposed between the two bearing surfaces. Means are provided to apply a preload to the bearing surfaces while limiting the minimum clearance between the surfaces. The resulting bearing is resistant to axial, radial and bending loads and eliminates an important source of backlash enabling the speed reducer to be used for precision motion control applications.