偏心齿轮驱动式玉米全膜双垄沟播联合作业机的设计

Design of eccentric gear driving whole film double furrow sowing corn combine harvester

针对传统全膜覆盖双垄沟玉米播种存在播种效率低,易撕膜和挂膜,操作不方便等问题,设计一种集起垄、压膜和播种为一体的联合作业机。该机的动力传动装置由非圆齿轮连接的曲柄连杆机构和圆柱齿轮连接的曲柄连杆机构,共同控制成穴器运动,提高了播种机播种的准确度。田间试验表明,偏心齿轮驱动式玉米全膜双垄沟播联合作业机的设计作业后相关指标均达到了技术规范要求;同时以非圆齿轮的偏心率、非圆齿轮带动的曲柄与连杆长度的比值和切膜刀角为自变量,以膜孔扩大率作为测试指标,进行多组田间试验,得出椭圆齿轮的偏心率e=0.1、非圆齿轮曲柄与连杆的长度比值k=0.05和切膜刀角α=31°最佳,此时膜孔扩大率为1.22%。

In the light of problems of traditional full film coverage double furrow sowing maize having low seeding ef- ficiency,easy tearing film,the biofilm formation and inconvenient operation,a jointing ridging,film, and seeding opera-tion machine was designed. The power transmission device of the machine was connected with a crank connecting rod mechanism which was connected by a noncircular gear and a crank connecting rod mechanism connected with a cylindrical gear. Test experiment showed eccentric gear drive type of maize in the whole film double furrow sowing combined opera-tion machine working related indicators have reached machine operation requirements. Also saw non circular gear eccen-tric rate, non circular gear driven crank and connecting rod length ratio and cutting membrane knife angle as independent variables, film hole enlargement rate as index for testing. The results indicated that it was the best when the elliptic gear eccentricity（ e ） , non circular gear crank and connecting rod length ratio （ k ） and cutting membrane knife angle （alpha） was 0.1, 0.05 and 31°, respectively, while the film hole expansion rate was 1.22%.