Abstract
Finite element based tooth contact analysis of a rack and pinion system of an impulse continuously variable transmission is performed in this study. The rack and pinion system are designed with involute profile herringbone tooth profiles. The involute profile herringbone tooth profile is a type of concave-convex pro-files, which can be used for heavy load conditions. A contact load distribution model of the rack gear with involute profile herringbone tooth profiles is devel-oped to analyze normal loads of any mashing position of the rack pinion system based on the minimum elastic potential energy theory. With the aim of improving the rack and pinion system design, the actual operation of gears under the terms of the three-dimensional tooth contact analysis is conducted. A rack gear with herringbone tooth profiles and a pinion are used to tooth contact analysis. Based on comparing the results of this analysis, a new type of rack gears with concave-convex involute tooth profile are advantages and disadvantages in terms of the contact stress.
Highlights
Rack gears are widely used in many areas, such as automobile, robotics, and renewable energy industry [1,2,3]
After achieving the necessary boundary conditions required for the analysis of the gears, the stress values for each angle of rotation were calculated
In the results of these stress analysis, carried out by the ANSYS, it has been observed that the weakest gear is the spur gear and the highest strength has been observed in herringbone gear, in the strength comparisons of the analyzed gear models
Summary
Rack gears are widely used in many areas, such as automobile, robotics, and renewable energy industry [1,2,3]. Since meshing performances of these gears with special tooth profiles are highly sensitive to manufacturing errors [12,13], high manufacturing accuracy of gear machine-tools is required for these gears [1416]. E.g., power losses, can be evaluated based tooth contact analysis [21,22]. Since these gears have convex-concave tooth profiles, they cannot be manufactured via standard gear manufacturing methods. In order to determine the performance characteristics of these gears, manufactured correctly, for the applicability in the industry; three-dimensional (3D) tooth contact analysis of the gears have been carried out by using ANSYS.
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