Articles About Ratios
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Four types of gear devices with great transmission ratios (simply called great ratio gears or GRGs) are discussed in this paper. They are strain wave gearing devices (SWGs), trochoidal gear reducers (TGRs), hypocyclic gear reducers (HGRs) and James Ferguson-type planetary drives (JFDs). The structures, advantages and basic performances of these four devices are compared. The latest design and strength analysis methods are also introduced. To conclude, the future tendencies of GRGs are predicted.
In this paper, the influences of various gear parameters on the mesh stiffness are systematically investigated by using the finite element method. The comprehensive analysis shows that contact ratios are the key factors affecting the fluctuation value of mesh stiffness.
In the design of an automatic transmission gearbox, the variation of one parameter can result in different system performances due to the strong interdependencies among all components. For given transmission ratios, component lifetimes and safeties, or space restrictions, improvements in efficiency, noise, and weight can be achieved.
News Items About Ratios
1 Alpha Gear New Gearhead Follows Trends in High Reduction Torque and Ratios (April 11, 2006)
The new SPK+ right-angle gearhead is designed for applications with high reduction ratios and torques. This product combines features of...
2 alpha gears Right Angle Gear Reducer Designed for High Reduction Ratios (April 22, 2006)
alphas TPK+ dual technology gear reducer is a two-stage right-angle gearhead for servo applications featuring a robot flange accord...
3 Expanded Line of LeCentric Helical In-Line Reducers Includes Ratios up to 18,587 lb-in Torque (June 3, 2015)
Grove Gear's expanded range of LeCentric helical in-line reducers offers advantages for OEM and MRO applications alike, with quick de...
4 Gearing Solutions Yaw Drives Offer Efficient Power-to-Weight Ratios (June 28, 2018)
Using unique roller gear technology, Gearing Solutions wind turbine Yaw Drives have an unparalleled power to weight ratio, achieving grea...