When a small tracked agricultural truck is on the road, the drive wheels and tensioning wheels are not in contact with the ground, the load is only transferred to the supporting wheels through the two wheel balancing beams and then contacts the ground through the track plate, so the two wheel balancing beams are selected as the restraint position for the part of the track frame where they are connected, i.e. the two wheel balancing beam shafts. However, if the entire shaft is restrained the restraint stiffness will be too great, resulting in excessive stresses around the joint between the two balance beam shafts and the track frame, so it is simplified to restrain the shaft centre point.

Through the above analysis, the lower steel structure is constrained to have linear displacement in X and Y directions and rotational freedom around the Z axis at the connection between the left and right track frames and the balance beam, and a Z-directional linear displacement constraint is applied to the lower part of the base.

The small tracked agricultural transport vehicle is traction climbing and load climbing are both straight ahead, so the same restraint method is used.

A one-sided turn is a one-sided turn in which the right track is driven forward and the left track is braked to a stop, so the left track linear displacement is constrained and the right track is given the freedom to drive the travel. The constraints are: Y-directional displacement at the connection between the right track frame and the balance beam, Y- and Z-directional displacement at the connection between the left track frame and the balance beam, X-directional displacement at the connection between the left track frame and the drive wheel and at the connection between the middle of the left track frame and the balance beam.