Through studying the variable relation of each lever of double swing levers mechanism, its mathematical model of strength increasing times is established, which has been designed and calculated by computer, so as to solve the inherent defects of the traditional diagrammatical method for calculating strength increasing times.

Development of Power-enhanced Clamping Jaws for NC Heavy-duty Horizontal Lathe;

The application of cylinder-ball force amplifier in hydraulic fixture;

Compound drive system of two-step force amplifier composed of inclined planes and steel-balls which is based on fluid cylinder and symmetric mode;

Combing pneumatic muscle with mechanic force amplifier is an applied and creative design method.

Development and application of force boosting device for service wellhead;