| 摘要 |
PROBLEM TO BE SOLVED: To enable the smooth engagement of dog teeth of a dog clutch in a crank continuously variable transmission including an advance-reverse switching mechanism constituted by the dog clutch.SOLUTION: An output shaft 12 of a crank continuously variable transmission T includes an output shaft upstream part 12A near a one-way clutch 21 and an output shaft downstream part 12B near an advance-reverse switching mechanism S, and a clutch mechanism C is disposed between the output shaft upstream part 12A and the output shaft downstream part 12B. With this configuration, the advance-reverse switching mechanism S constituted by a dog clutch can be smoothly engaged by disengaging the clutch mechanism C. Furthermore, the clutch mechanism C includes roller support shafts 71, 73 extending radially from shaft ends of the output shaft upstream part 12A and the output shaft downstream part 12B, respectively; and rollers 72, 74 supported by the roller support shafts 71, 73 to be able to roll, respectively. It is, therefore, possible to ensure the smooth engagement of the clutch mechanism C even if the phase of the rollers 72, 74 does not match the phase of a sleeve 75. |
