The Grass Square Latch Paving Agency Based on the Bionic Spinning Knife

Abstract

To better solve the problem of land desertification, this paper designed a portable grass grid-laying robot to lay grass squares to prevent wind and sand fixation. Among them, the ploughing module was proposed to use a bionic rotary tillage knife to improve soil cutting efficiency. By analyzing the characteristics of the forefoot claw contour curve of the groundhog, the point cloud data of the claw toe profile curve was obtained by reverse engineering technique, and then the Gaussian equation of the contour curve was fitted by MATLAB and the toe tip profile fitting curve was obtained. The BT model of the obtained fitting curve was applied to the national standard rotary tillage knife to design a preliminary bionic rotary tillage knife. When W0 was 50 mm and θ was 35°, the resistance of the rotary tillage knife was the least and the cutting performance was the best, and the final bionic rotary tillage knife was designed. In the field test, the data pointed out that compared with the traditional national standard rotary tillage knife, the maximum stress of the bionic rotary tillage knife was only 32.21 MPA, the average torque decreased by 10.16% compared with the national standard rotary tillage knife, the average power decreased by 7.68% to 71.4 KW, the tool quality was reduced by 8.26%, and the crushing rate was greatly improved. This study can provide some reference for the design of grass grid laying machines and rotary tillage knives to reduce resistance and consumption.