我们这里有相当一部分液压升降的牵引式五铧犁。但是在拖拉机同液压犁液压油缸间的联接油压软管上,却没有快速安全接头。这样,在工作中一旦超负荷,保险销子被剪断,随之油压软管也将被拉断,使液压油流失,损失很大。为了避免这种情况,机组都把五铧犁上的安全装置同牵引杆焊死在一起。这样,保险销子失去作用,即使在严重超负荷情况下,拖拉 Here we have a considerable part of the hydraulic lift traction five -shaped plow. However, there is no quick safety coupling on the coupling hose between the tractor and the hydraulic plow hydraulic cylinder. In this way, once the work overload, the insurance pin is cut, along with the hydraulic hose will be pulled off, so that the loss of hydraulic oil, a great loss. To avoid this, the crew welded the safety devices on the five-plow to the drawbar. In this way, the insurance pin loses its effect, dragging even under severe overload conditions