The utility model relates to an anti-collision improvement of a leveling device.Both ends of a main rod are respectively connected by a pivot unit.The auxiliary rod is driven by the hydraulic cylinder and retracted.The pivoting unit system comprises a main rod pivoting seat fixed at the end of the main rod and a pair of opposite ends of the rod pivoting seats.And an intermediate pivot seat is pivotally connected between the pivot seat of the auxiliary rod and the auxiliary rod in horizontal and vertical directions.At the same time, the driving end of the hydraulic cylinder is connected to the inner end of the main rod pivot seat and the outer end of the auxiliary rod pivot seat through two pairs of connectors.A safety screw is arranged between the front side of the auxiliary rod and the pivot seat of the auxiliary rod for vertical locking.And the top surface of the rear side of the corresponding side auxiliary rod is locked and fixed with a pressing plate whose end is pressed against the auxiliary rod pivot seat.Furthermore, when the secondary bar is impacted strongly in a non vertical direction,The horizontal component of the impact can make the pressing plate slide off easily.The safety screw is broken to protect the auxiliary rod and its related connecting elements.At the same time, because the safety screw and the pressing plate are fixed and supported at two points, it can greatly slow down and overcome the up and down shaking amplitude and the force path of the auxiliary rod during the leveling or flattening operation.Avoid unnecessary tearing of safety screws.To ensure that the leveling device can continue to be used.一種整平裝置的防撞改良，是包括一主桿兩端各接設有透過樞合單元連結、並由液壓缸驅使而收展的副桿，該樞合單元係包括一固定在主桿末端的主桿樞座與一副桿樞座的相對端樞固，且設一中間樞座分別以水平與垂直方向樞接連結於副桿樞座與副桿之間，同時液壓缸之驅動端透過兩對分別樞接於主桿樞座內側端與副桿樞座外側端上的連件，更令副桿前側邊與副桿樞座之間透過一安全螺絲垂直鎖固，而對應側之副桿後側邊的頂面上鎖固一其末端抵壓住副桿樞座的壓掣片，進而當副桿遭到非垂直方向之強烈撞擊時，撞擊的水平分力可使壓掣片輕易的滑脫後，使安全螺絲斷裂而達保護副桿及其相關連結元件的目的，同時也因安全螺絲與壓掣片兩點固定支撐住而可大幅減緩及克服副桿在整地或展平作動時的上下晃動幅度與力道，避免安全螺絲發生不必要的扯斷，以確保整平裝置之可繼續
