Abstract: In this paper, the method of nonlinear programming is used to design the Work-mechanism of scooper loaders. The mathematical model contains nine design variables, thirty-four constraint equations and one comprehensive objective function consisting of the parallelism of scoop upward motion and the rotating force of hydraulic cylinder for running scoop.
The above mathematical model had been applied for computation to the domestic ZLD-40 type scooper loader by means of SUMT and interesting re-sutls were obtained.
The computed resutls confirms the crrectness of the above mathematical model. The design quality and operation effectiveness of the work-mechanism pf the scooper loader could be improved by this method.