| 摘要 |
PURPOSE:To obtain a sufficient thrust in a small size, by arranging projections and recesses on a rail in a specific pitch, providing three sets of sliding bodies in which two sliding bodies lining up in the sliding direction in the same pitch into one set, and engaging the sliding bodies, and the projections and recesses at a specific phase difference, at every set of sliding bodies. CONSTITUTION:Projections and recesses are arranged on a rail 6 in a specific pitch, and eccentric crankshafts 7a to 7c, and 8a to 8c, hold three rotation members 2 to 4 rotatable on the axis orthogonal to the rail 6. Four sliding bodies Kia to Kib are installed to the rotation member 2 at the near side, and they are slided on the rail 6 following the rotating operation of the rotation member 2. Between the rotation members 2 to 4, rotating phase differences are set by the eccentric crankshafts 7a to 7c, and 8a to 8c. When a set of sliding bodies Kia to Kib are abutted to the uphill slope, the other one set Kia to Kib are abutted to the downhill slope, and as a result, a thrust necessary to overcome the uphill slope can be obtained from the other set sliding bodies Kia to Kib. |
