Geometry design, three-dimensional modeling and kinematic analysis of orthogonal fluctuating gear ratio face gear drive

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  • Chao Lin
    The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing, China
  • Hai Gong
    The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing, China
  • Ning Nie
    The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing, China
  • Qinlong Zen
    The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing, China
  • Lei Zhang
    The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing, China

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<jats:p> As the current research of face gear drive cannot realize fluctuating gear ratio, a design method of orthogonal fluctuating gear ratio face gear drive is proposed. The mathematical model of orthogonal fluctuating gear ratio face gear drive is found based on the space engagement theory. The equation of the pitch curve, addendum curve and dedendum curve of face gear are derived. The design method of tooth surface of the face gear is available based on the envelope method. The conversion relationship of enveloping coordinate systems is obtained during the enveloping process of orthogonal fluctuating gear ratio face gear drive after the establishment of enveloping coordinate systems. Then combining with equation of generating surface, the tooth surface equation of the face gear is obtained. The three-dimensional model of orthogonal fluctuating gear ratio face gear is acquired on the basis of a modeling program, which is developed under the environment of VB and Solidworks (API). Furthermore, localization of the bearing contact is achieved by the manufacturing method and it is justified by the finite element method analysis result. Finally, the kinematics of the orthogonal fluctuating gear ratio face gear drive is analyzed, and the change laws of transmission ratio, angular displacement and angular acceleration of the face gear are acquired. </jats:p>

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