| 摘要 |
<p>Cylindrical gear drive with materialized pitch cylinders comprising two double-ring gear wheels is known in the prior art. Each of said double-ring gear wheels is shaped with a cylindrical bead with diameter of the cylindrical surface equal to that of the corresponding pitch cylinder. Rolling contact is realized between said double-ring gear wheels through the cylindrical surfaces of the corresponding cylindrical beads. It is a certain disadvantage of heretofore cylindrical gear drives with materialized pitch cylinders that they possess relatively great overall dimension in axial direction. The proposed solution to said problem is that for each of said double-ring gear wheels (1, 2) the outside diameter of one of the corresponding toothed rings and the root diameter of the other toothed ring should be reciprocally equal and they should be in turn equal to the diameter of the corresponding pitch cylinder so that said toothed rings of the proposed gear drive would serve the purpose of said cylindrical beads of heretofore gear drives. The present invention can find commercial application first and foremost in the manufacture of eccentric planetary gear drives with small difference between the number of teeth of the corresponding gear wheels and with a satellite gear wheel floating in radial direction.</p> |
