| Pointed at the problem of large disturbance and seriously tearing film when corn film mulch and punch planter perpendicularly inserted the soil by parallel four-bar mechanism in our country, designed out the three rigid-one flexible forming hole mechanism, the parallel four-bar mechanism was replaced by the spring damping pole. Based on the Adams, established the simulation models as three rigid-one flexible mechanism and parallel four-bar mechanism, and which was simulated at the same conditions. The results showed that: The forming hole pole of the three rigid-one flexible mechanism was less change of displacement and smooth in the level direction in x axis than the parallel four-bar mechanism, while in y axis, the vertical direction trend was basically consistent. The pole of the three rigid-one flexible forming hole mechanism had slight disturbance to the front and back soil model, but the parallel four-bar mechanism only disturbed to the front soil, the disturbing force was 9.4 times higher than the three rigid-one flexible mechanism. Therefore, the design of three rigid-one flexible mechanism had less soil disturbance, useful seed germination compared with parallel four-bar mechanism. The forming hole pole can be recovered to the state of perpendicularly inserting soil when the pole don’t impose force, which had less damage to the film mulch. |