在辽宁70—2单体播种机上,为了防止种箱的种子外漏,并便于清理种箱的种子,设有防漏舌。但工作时,充满种子的窝眼与防漏舌相遇时,防漏舌不能完全封闭种箱,种子从防漏舌下面漏出,个别种子还会磕伤。尤其采用大窝眼排种轮和低速作业时漏种和磕种现象更为严重。为了防止大量种子在播种时被损伤和浪费,我们对70—2单体播种机的防漏舌进行了 In Liaoning 70-2 single seeder, in order to prevent seed seepage of seeds, seed and easy to clean seeds, with leak-proof tongue. However, when working, a seed-filled socket meets a leak-proof tongue, and the leak-proof tongue can not completely close the seed box. The seed leaks from under the leak-proof tongue and an individual seed can also knock. In particular, the use of Tai Wo eye row seeds and low-speed operation when the leakage and knock phenomenon is even more serious. To prevent large numbers of seeds from being damaged and wasted during sowing, we conducted a leak-proof tongue on a 70-2 single seeder