Abstract
A design method of low sliding ratio face gear drive is presented. The rack and gear meshing pair with a low sliding ratio is obtained by constructing the contact path. The face gear is then formed by this gear, and its tooth width characteristics are analyzed. Combined with the explicit solution of the meshing point of the tooth surface, a method to solve the sliding ratio of the proposed face gear pair is given, and the effects of relevant design parameters on the sliding ratio are analyzed. Moreover, the rationality of the tooth profile design is verified by 3D modeling and motion simulation. The proposed face gear pair has a lower sliding ratio, as well as larger tooth width, than those of traditional face gear drive (the pinion is involute spur gear) with the same basic parameters. The results of this study can provide points of reference for reducing friction and improving the mechanical efficiency of face gear drives.
Highlights
Face gear drive is a meshing transmission mechanism composed of cylindrical gear and bevel gear
The characteristics of the tooth width are widely concerned while designing the tooth profile of the face gear, which is related to the carrying capacity of the gear
(2) Discrete tooth surface coordinates: coordinate yf was discretized along the tooth width direction to obtain a series of yfi ; coordinate zf was discretized along the tooth height direction to obtain a series of zfj ; (3) Solving the tooth surface coordinate xf : According to yfi and zfj coordinates obtained by discretization, the surface equation was substituted to obtain the coordinate xfij ; (4) Data output: the point data stored in the matrix were cyclically outputted to a specific Excel file
Summary
Face gear drive is a meshing transmission mechanism composed of cylindrical gear and bevel gear. Combining the characteristics of the worm drive, a larger gear ratio face gear drive was developed, which is composed of conical or cylindrical worms [8]. They investigated a new geometry different from the existing one by application of asymmetric proles and double-crowned pinion of the drive [9]. The tooth profile design of the face gear drive with a low sliding ratio is whereas the design of the cylindrical gear drive has been previously considered. Presented a design method forsliding plane meshing tooth profiles, which can usedetas design of gear drive with a low ratio.
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