Transmission of agricultural work vehicle

A transmission of an agricultural working vehicle, the transmission comprising:

• a preceding transmission portion configured to perform shifting with respect to driving transmitted from an engine of the agricultural working vehicle;
• a clutch portion connected to the preceding transmission portion to selectively output driving transmitted from the preceding transmission portion;
• an adjustment portion connected to the clutch portion to perform shifting with respect to driving transmitted from the clutch portion;
• and
• a succeeding transmission portion connected to the adjustment portion to perform shifting with respect to driving transmitted from the adjustment portion,
• wherein the preceding transmission portion comprises a first preceding transmission unit configured to perform shifting with respect to the driving transmitted from the engine and a second preceding transmission unit configured to perform shifting with respect to the driving transmitted from the engine,
• wherein the clutch portion comprises a first clutch unit connected to the first preceding transmission unit to selectively output driving transmitted from the first preceding transmission unit and a second clutch unit connected to the second preceding transmission unit to selectively output driving transmitted from the second preceding transmission unit,
• wherein the adjustment portion comprises a first adjustment unit connected to the first clutch unit to perform shifting with respect to the driving transmitted from the first clutch unit using a gear ratio and a second adjustment unit connected to the second clutch unit to perform shifting with respect to the driving transmitted from the second clutch unit using a gear ratio different from that of the first adjustment unit, and
• wherein the succeeding transmission portion comprises a first succeeding transmission unit connected to the first adjustment unit to perform shifting with respect to driving transmitted from the first adjustment unit and a second succeeding transmission unit connected to the second adjustment unit to perform shifting with respect to driving transmitted from the second adjustment unit,
• wherein the first preceding transmission unit comprises a first preceding transmission shaft and a first preceding transmission gear which is coupled to the first preceding transmission shaft to be idly rotatable in order to rotate due to the driving transmitted from the engine,
• wherein the second preceding transmission unit comprises a second preceding transmission shaft and a second preceding transmission gear which is coupled to the second preceding transmission shaft to be idly rotatable in order to rotate due to the driving transmitted from the engine,
• wherein the first clutch unit is coupled to the first preceding transmission shaft, and the second clutch unit is coupled to the second preceding transmission shaft,
• wherein the first succeeding transmission unit comprises a first succeeding transmission shaft and a first succeeding transmission gear coupled to the first succeeding transmission shaft to be idly rotatable,
• wherein the second succeeding transmission unit comprises a second succeeding transmission shaft and a second succeeding transmission gear coupled to the second succeeding transmission shaft to be idly rotatable,
• wherein the first adjustment unit comprises a first adjustment shaft coupled to the first clutch unit, a first adjustment input gear coupled to the first adjustment shaft and a first adjustment output gear engaged non-coaxially with the first adjustment input gear and coupled to the first succeeding transmission shaft of the first succeeding transmission unit,
• wherein the second adjustment unit comprises a second adjustment shaft coupled to the second clutch unit, a second adjustment input gear coupled to the second adjustment shaft and a second adjustment output gear engaged non-coaxially with the second adjustment input gear and coupled to the second succeeding transmission shaft of the second succeeding transmission unit, and
• wherein a gear ratio of the second adjustment output gear to the second adjustment input gear and a gear ratio of the first adjustment output gear to the first adjustment input gear are different from each other.