Manipulation device for a transmission apparatus

A manipulation device for a transmission apparatus of a vehicle having a first main drive shaft connected to a crankshaft of an engine through a clutch means, a sub-transmission provided adjacent to said first main drive shaft, a second main drive shaft provided adjacent said sub-transmission, said sub-transmission including reduction gear trains and a manual clutch means manually operable to select the transmitting speeds for transmitting the output of said first main drive shaft to said second main drive shaft, a third main drive shaft in parallel with said second main drive shaft, a main transmission provided on said second and third main drive shafts, means for transmitting the output of said third main drive shaft, said transmitting means comprising two transmitting systems for transmitting said output to the front axle and to the rear axle, respectively, a clutch device in one of said systems for connecting or disconnecting the transmission of the output to the corresponding said axle, comprising:

• means comprising a shift rail axially slidably mounted for shifting said clutch means in said sub-transmission,
• an actuating rail slidably mounted in parallel with said shift rail,
• a fixed rail in parallel with said shift rail and said actuating rail,
• a shift lever connected to said actuating rail,
• a shift fork slidably mounted on said actuating rail and said fixed rail, said shift fork being connected to said clutch device,
• an arm secured to said shift rail and slidably engaged with said actuating rail and said fixed rail,
• first interlock means between said actuating rail and said shift fork and said fixed rail for causing said actuating rail and said shift fork to come into fixed engagement relation to each other within a first moving range of said actuating rail thereby causing shifting of the shift fork by manipulating said shift lever in one direction of movement of the actuating rail, and for causing said shift fork and said fixed rail to engage with each other within a second moving range of said actuating rail adjacent said first moving range,
• second interlock means between said actuating rail and said arm and said fixed rail for causing said actuating rail and said arm to come into fixed engagement relation to each other within the second moving range of said actuating rail adjacent said first moving range causing shifting of said shift rail in another direction of movement of said actuating rail, and for causing said arm and said fixed rail to engage with each other within said first moving range of said actuating rail, and
• means disposed on said actuating rail between said shift fork and said arm for moving said shift fork in said first moving range in said another direction of movement, and respectively, for moving said arm in said one direction of movement of the actuating rail in said second moving range.