| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a continuously variable automatic transmission mechanism optimum for the case in which a constitution of a low output power source and a simple mechanism is demanded as in a self-advancing model vehicle. Ž<P>SOLUTION: The continuously variable automatic transmission mechanism has a pulley member formed by a pair of opposed half pulleys 4, 6 on an input shaft 2 for inputting the power of a motor 1 and includes an input-side slide regulating means 60, 7a for regulating at least the half pulley 6 to slide within a predetermined range only in a direction parallel to the axial direction of the input shaft. A half pulley 13 in a pulley member on an output shaft 10 includes an output-side slide regulating means 130, 12a for regulating itself to slide within predetermined ranges in the axial direction and in the rotational direction. The continuously variable automatic transmission mechanism performs such speed-changing actions that when the output shaft is under a low load, a half-pulley spacing on the input side is small and a half-pulley spacing on the output side is large and when the output shaft is under a high load, the half-pulley spacing on the input side is large and the half-pulley spacing on the output side is small. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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