FEM Analysis And Experimental Study On Backlash Adjustable Plane Wormgear With Variable Tooth Thickness Enveloping Worm Transmission Pair

Backlash adjustable plane wormgear with variable tooth thickness enveloping worm transmission (short as plane wormgear with variable tooth thickness drive) is a patent developed by Professor Zhang Guanghui. As a new worm transmission, it has its significant advantageous: firstly, axial position of wormgear can be adjusted to regulate tooth side clearance between worm and gear so that backlash is decreased, which lead to less vibration and more precision and stability of transmission. Secondly, the worm can ben quenched and then precise grinded by plat-faced wheel.Moreover,the gear can be cut with precise index plate.Compared with conventional wheel,it is machined without worm hobbing cutter and hobbing machine,which elimilate errors caused by hobbing cutter and hobbing machine.Thirdly,as one of oblique plane primary enveloping worm drive, which has more meshing tooth pairs,it has high contact ratio leads to strong bearing capability,which near to plane double enveloping worm drive.So, it is a new worm drive combine characteristics of precise transmission and power transmission.At present, systematical study of fabrication process of this new transmission set has been done. As a scientific research, more jobs need to be done on it. FEM and theory of space engagement incorporated, contact strength, main stress envelope on root of tooth, load distribution among teeth and effect that assembly error to transmission strength has been studied in this paper. Through experimental research on backlash adjustable worm reducer, performance curve of efficiency, temperature rise, power and torque has been got from experiment, which further showed performance of this reducer.