| 摘要 |
This transmission 20 has gears 421-426 and 441-446, sliders 451-453, an electric motor 58, a shift drum 50, shift forks 491-493, and a control unit 83. The sliders 451-453 are separate from the gears 421-426 and 441-446. The shift drum 50 has guide grooves 61-63 that include a straight line part 64 and an inclined part 65. One end of the shift forks 491-493 is positioned within the guide grooves 61-63. The control unit 83 controls the electric motor 58, and rotates the shift drum 50 in such a manner that the shifting angle of rotation is less than 60°. As a result of the shift drum 50 rotating by the shifting angle of rotation, the shift forks 491-493 move the sliders 451-453 in the axial line direction of the shafts 21, 22. As a result, the dog part of the sliders 451-453 mesh with the dog part of the gears 441-446, and the rotation of the shaft 21 is transmitted to the shaft 22. |
