Four-point type conveying mechanism for seedling raising tray

The invention discloses a four-point type conveying mechanism for seedling raising trays. The four-point type conveying mechanism comprises seedling raising side frames, conveying chain wheels, conveying chains, a triangular connecting rod frame, a chain anti-twisting guiding device and a tray anti-overturning guiding device. According to the device, a stable four-point type conveying mechanism is formed by a four-rod mechanism composed of a conveying chain, a supporting connecting rod and a tray anti-turning connecting rod through four points A, B, C and D, the four-point type vertical conveying mode serves as a core innovation point of seedling raising equipment, and anti-twisting pulleys at the points A and B move in vertical anti-twisting longitudinal guide rails; the four-point conveying mode is used for balancing the torque of the weight of the seedling raising tray at the C point to the conveying chain, the anti-turning pulley at the D point operates in the constraint guide rail with a specific track s