Patent ID: 8833192
Filing Date: 2014-09-16
Classification: F16H,G04B,Y10T

Abstract:
1. A gear train comprising: a first toothed wheel with a first number (z a second toothed wheel with a second number (z the first teeth meshing with the second teeth so that the first wheel drives the second wheel, a distance between centers of the first and the second wheels deviating from a nominal axial center distance (d) by no more than a predefined axial center distance tolerance, wherein a first profile of one of the first teeth contactable to a corresponding one of the second teeth along a line of meshing is calculated with the following double formula in Cartesian coordinates: where an origin (x and where R 1 =d 1 cos(α−a tan μ) is a base radius; wherein a second profile of said corresponding one of the second teeth is calculated with the following double formula in Cartesian coordinates: where an origin (x and where R 2 =d 2 cos(α−atan μ) is a base radius; and wherein α corresponds to an angle between the line of the centers and a tangent to a tooth at a center contact point (P is a nominal distance between the center of the first wheel and the center contact point (P o ), and is a nominal distance between the center of the second wheel and the center contact point (P o ), furthermore, ε is an efficiency of gearing and μ is a positive parameter which corresponds to a coefficient of friction on the line of meshing between said one of the first teeth and said corresponding one of the second teeth, μ including values between 0.05 and 0.5, and where u is a variable which varies between 0 and 1/μ such that by varying u, the first profile and the second profile are calculated.