A stop device includes a first shift lever including a first shifting part configured to rotate around a rotation axis to form a first motion trajectory, and a second shift lever including a second shifting part partially within the first motion trajectory. The first shifting part drives the second shifting part to rotate around the axis of the rotating shaft to form a second motion trajectory. The stop device further includes a stopping boss located on a periphery of the first motion trajectory and partially within the second motion trajectory. The second shift lever rotates to drive the second shifting part to contact a first side of the stopping boss when rotating in a first direction and to contact a second side of the stopping boss facing away from the first boss when rotating in a second direction opposite to the first direction.