| 摘要 |
PROBLEM TO BE SOLVED: To facilitate traveling switching operation by providing a second ball engaged and disengaged with and from a first semi-spherical groove and a second elliptic groove by the axial movement of a shift yoke. SOLUTION: A shift yoke 90 is moved from a high speed four-wheel drive 4H to a low speed four-wheel drive 4L by a three-stop position actuator. The shift yoke 90 is operated only for the anticipated overstroke S2 so that a first ball 102 and a second ball 104 engage with a first semispherical groove 84 from the position of the end point of the overstroke. Thus, a high speed low speed shift shaft 60 is moved in the axial direction by the distance S3 unit a high speed low speed fork 62 abuts against a low speed side stopper 66. Thus, shifting to the low speed four-wheel drive 4L is completed. At this time, the shift yoke 90 is also moved in the axial direction by the distance S3 with the movement of the high speed low speed shift shaft 60. |
