Book ChapterDOI
Gear Geometry and Applied Theory: Face-Gear Drives
Faydor L. Litvin,Alfonso Fuentes +1 more
- pp 508-546
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In this article, a conventional face-gear drive is formed by an involute spur pinion and a conjugated face gear drive, which can be applied for transformation of rotation between intersected and crossed axes.Abstract:
INTRODUCTION A conventional face-gear drive is formed by an involute spur pinion and a conjugated face-gear (Fig. 18.1.1). Such a gear drive may be applied for transformation of rotation between intersected and crossed axes. An important example of application of a face-gear drive with intersected axes is in the helicopter transmission (Fig. 18.1.2). The manufacturing of face-gears by a shaper was invented by the Fellow Corporation. The basic idea of generation is based on simulation of meshing of the generating shaper with the face-gear being generated as the meshing of the pinion of the drive with the face-gear. In the process of generation, the surfaces of the teeth of the shaper and the face-gear are in line contact at every instant. However, when the shaper is exactly identical to the pinion of the face-gear drive, the generated face-gear drive becomes sensitive to misalignment. This causes an undesirable shift of the bearing contact and even separation of the surfaces. Therefore, it is necessary to provide an instantaneous point contact between the tooth surfaces of the pinion and the face-gear instead of a line contact. Then, the bearing contact will be localized and the face-gear drive will be less sensitive to misalignment. Point contact between the pinion and face-gear tooth surfaces is provided by application of a shaper of number of teeth N s > N p where N p is the number of teeth of the pinion of the drive (see Section 18.4).read more
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Book
New Design and Improvement of Planetary Gear Trains
Robert F. Handschuh,Faydor L. Litvin,Alfonso Fuentes,Daniele Vecchiato,Ignacio Gonzalez-Perez +4 more
TL;DR: In this paper, the development of new types of planetary and planetary face-gear drives is proposed, which are based on regulating backlash between the gears and modifying the tooth surfaces to improve the design.
Journal ArticleDOI
Research on Machining Method of Complex Surface Face Gears
Yan Zhong Wang,Liang Wei Hou,Yan Qiang Liu,Rong Shen,Can Hui Wu,Hong Xia Ge,Zu Zhi Zhang,Wu Zou,Yuan Li +8 more
TL;DR: In this paper, a CNC machining method of complex surface face gear used CNC machine tools and a hob cutter is described, based on surface characteristics and gear hob principle.
Journal ArticleDOI
Non-linear Dynamic Modelling and Analysis of Split-Torque Face-Gear Drive Systems
TL;DR: In this paper , a nonlinear dynamic model of a multi-mesh involute spur pinion-driven face-gear split-torque drive system is developed, which includes two inputs, two outputs, and three idler gears meshing with two identical face gears at the bottom and top of the assembly.