The present invention relates to agricultural work surface heights. The invention track frame 10 and the bogie frame (2) smashing the balance is provided and the ground as the piston rod of the lift cylinder 32 to the bogie frame (20) of the truck are retracting, including spread X-shaped link ( 30) is provided and dappan 40, which is elevated in accordance with the X-shaped link 30 are folded or unfolding the end of the X-shaped links (30) in the complaint table containing the track frame 10 is when the bogie frame 20 is compensated in the horizontal tilting (tilting) to track frame 10 yen bracket 15 is extended to cross toward the track frame (10) facing each other the brackets 15, a first connection member 16 is integral to the feature edge and the bogie frame (20) in orbit frame (10 is connected to the tilting hinge (25) on both sides the central part and the lower position of the bogie frame (20) of the bracket 15 via the ) side of the first connection and the first cylinder 24 is connected to each of the members 16 of each of the FIG track frame (10 in the end of the frame 10, the outer tip end and on the outer side at the rear end portion presented by the rotating lift around the respective first hinge 51, rotary arm 52 is extended the rotary arm 52 of the ), the second linking member 55 and the track frame (10 with a length able to support in a direction doedoe support (54) is connected provided in the middle of the swivel arm 52 to rotate the rotary arm 52 of the ) it characterized in that the second cylinder 56 are connected respectively to the.
Therefore, the bogie frame is also relatively rotating caterpillar on one side with the support of one time someone horizontal compensation endless track and support the to solid and stable support to the floor to stably compensate the horizontal without shaking the bogie frame and dappan that would be.