Patent ID: 8430787

Claim:
A power transmission device for a work vehicle configured to transmit torque from a driving source to a wheel, the power transmission device comprising: a first planetary gear reducer configured to receive the torque inputted from the driving source and transmit the torque to the wheel, the first planetary gear reducer including: a first sun gear coupled to the driving source; a plurality of first planet gears meshed with the first sun gear; a first carrier supporting the plural first planet gears in a rotatable state; and a first ring gear meshed with the plural first planet gears, the first ring gear being coupled to the wheel; a second planetary gear reducer configured to transmit the torque to the wheel together with the first planetary gear reducer, the second planetary gear reducer including: a second sun gear coupled to die first carrier; a plurality of second planet gears meshed with the second sun gear; a second carrier supporting the plural second planet gears in a rotatable state; and a second ring gear meshed with die plural second planet gears, the second ring gear being coupled to the wheel; and a hydraulic clutch mechanism including: a rotary part coupled to the second carrier; and a stationary part configured to be coupled to or decoupled from the rotary part.