| 摘要 |
1286637 Friction gearing BIVIATOR SA 24 Sept 1969 [23 Oct 1968] 45503/69 Heading F2Q A drive for a drill spindle 3 comprises overlapping rollers 1, 2 on parallel shafts and a roller 4 pressing the spindle 3 against the rollers 1, 2, the angle between the normals at the points of contact with the rollers 1, 2 being 100 degrees or less. Preferably the angle is at least 80 degrees. The roller 4 may be replaced by a yoke. |
