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High transverse contact ratio (HCR) gears are non-standard involute gears with a transverse contact ratio ea>2 which proved adequate for use in automobiles, trucks, aircrafts and ships. The paper deals with the dependence of the sliding friction losses on HCR spur gears geometry such as pressure angle, tooth height, gears centre distance resp. addendum modification coefficients sum, addendum modification...
The advantage of high contact ratio (HCR) involute gears (contact ratio in excess of 2) comparedwith the standard gears (contact ratio less than 2) are: bigger load capacity, more uniform torque transsmision and noise reduction.This is the result of double and triple teeth pair contact altrnatively, instead of single and double contact. The bigger load capacity, as one of the most important features,...
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