ABSTRACT:Broad bean，as a kind of green healthy vegetables are widely planted in our country，at present，the broad bean seeder with peanuts and corn seeder，become a multifunctional seeder，especially in plain area. But is suitable for the southwest rice stubble field of broad bean seeder has not come out，rice field due to the former crops planting rice relationship makes soil viscosity is bigger，difficult to achieve the process of ploughing and sowing. This design aimed at the gap intends to design a adaptive rice stubble field or soil viscosity larger broad bean seeder. Main features are as follows: the first combining with the characteristics of rice stubble field choose suitable actuator - CAM mechanism; Second CAM is designed according to the requirement of structure size make the CAM rotation driven push rod movement to finish planting operation; The third design calculations according to mechanical characteristics machine the size of the output shaft; Fourth combined shaft speed is designed according to certain rules of movement of the device，in order to realize the automatic metering and smaller leak seeding rate is guaranteed. The broad bean seeder once every complete sowing takes 2 s，completion rate for the two lines of four columns at the eight. The planter is not only to replace the human waste caused by sowing seeds，uneven phenomenon，but also greatly improving the seeding efficiency，reduces the waste，and win the best sowing season for agricultural production.
Keywords: Broad bean seeding machine;CAM mechanism;Automatic metering; raise efficiency