On the base of simply introducing running transmission mechanism of shearer,according to the theory of rack and pinion engagement,mainly analyses impact cause resulted from toothing between shearer involute sprocket and conveyor pin-rail,using the specific parameters.

On the basis of original screw type, winding type and hydraulic type Headstock, a kind of dentate annul headstock is designed and manufactured.

Application of pin gearing in the vertical movable bridge;

This paper discusses the problems the computing method of pin gearing in the present machinery design handboods, deduces the theoretical computing formula for overlap coefficient and determines the limiting value of gear tip radius.

This paper describes the principle of the working of pin gearing, infers the mathematical expression: overlap caefficien≥1, proves that under certain conditions when there is a smaller number of teeth, the expression of overlap coeffcient≥1 is still valid, and finally concludes by indicating the advantages of application of pin gearing in the packaging machinery.

Courrently the analysis of bending intension of vice gear of pin gear transmission is still on the basis of the traditional theory of intesion and the supposing computating method of actionless intension,comparing with the present technology request,which has the certain disparity and is to study for further performs thoroughly.

The computer assisted optimization design of the rifeness used involute column gear transmission has already been researched a great many,but the optimizing design about application increasing pin gear transmission still has not been seen as yet.