The three-dimensional dynamic simulation of gear oil pump based on virtual design;

The struture feature of the circle arc cycloidal gear oil pump is described.

Based on the theory analysis,the reason was discovered of oil- blocking during the operation of a gear oil pump,which resulted in power loss,vibration and noise.

Taking gear pump as an example,the text introduces the method to construct virtual reality model of the mechanical product and realizes the key technology virtual assemblly and disassembly of the mechanical product.

The total scheme about the parametric system for gear pump and the parametric model of products were pointed out after the crucial technology in the parametric designing was theoretically analyzed,and then,the relationship between the driving dimension of assemblies and parametric system was analyzed,too.

The paper introduced two methods of fin cutting in precision hole and dual gear (or gear with shifter fork)slot.

Presents the study on a semi precision forging process suitable for dual gear, by which, the machining tolerance of a single side achievable on the contour of the gear is 0.

A shifting fork controls a cylinder, a geared sleeve is connected with a dual gear, which can generate a high or low speed, and the gearbox can have two types of outputs.