| The two tooth difference shock wave rolling teeth with drive cam is a new tooth drive form, its most notable feature is the shock device profile using elliptic curves, and the structure was the form of axial symmetry, so that the transmission is more compact. In this paper, based on existing research, further analysis and improvement of shock wave rolling teeth with drive cam was made on profile modification and forces analysis theory.This paper briefly described the development history of movable teeth transmission, research situation and the characteristics of two tooth difference shock wave rolling teeth with drive cam. Modification technique was described in research s status and the important significance in practical application. Based on the envelope principle and method of the relative movement were derived respectively one, two tooth differenced shock wave rolling teeth with drive cam the theoretical profile equation and working profile equation. The curvature formula and pressure Angle formula of the tooth profile was deduced, and analyzed the influence of tooth profile parameters on the curvature and the pressure Angle. Analyzed conditions which the center gears tooth profile not interference, which the value of movable tooth radius to be under the curvature radius of the theoretical tooth shape in tooth roof.This paper introduced the characteristics of various profile modification manners, including single parameter form and the composite parameters, and draws the shape of the center gears tooth profile after it to be modified. Detailed derived is suitable for both single parameter profile modification and composite parameters profile modification form the general tooth-type equation. Analyzed radial clearance and normal clearance after the center gears tooth profiler be modified, the size of the normal clearance directly influences the stress of tooth profile. The geometric relative angle is deduced after the center gears tooth profiler was modified, was the basis of calculation geometry hysteresis of movable tooth drive device and forces analysis.Based on contact deformation and deformation coordination theory was presented movable tooth meshing pair stress analysis model and algorithm. Calculated the two tooth differenced movable tooth drive the stress of the tooth profile force, its characteristic is a movable tooth located in two of meshing area axisymmetric distribution of each, two meshing area where a tooth profile symmetric cloth gearing-in force equivalent reverse. Stress calculation after tooth profile modification is by changing the standard tooth profile stress compatibility equations of deformation, when normal clearance after tooth profile modification will be built to the meshing direction shock wave rolling teeth with drive cam and movable tooth, join equation.Put forward a new method of tooth profile modification- clearance point-wise controllable modification method and the algorithm is presented. According to standard tooth profile stress trends, gained the force curve through the search algorithm from the tooth profile after modification, and calculates the normal clearance after the tooth profile was modified.By the normal clearance after tooth profile was modified, and according to the tooth profile on some of the equivalence principle, drew the tooth profile work contour line after it was modified. |
