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Gleason's GMS analytical gear inspection systems provide all the right features at Eaton Corp.
The complete Industry News section from the October 2013 issue of Gear Technology.
A best practice in gear design is to limit the amount of backlash to a minimum value needed to accommodate manufacturing tolerances, misalignments, and deflections, in order to prevent the non-driving side of the teeth to make contact and rattle. Industry standards, such as ANSI/AGMA 2002 and DIN3967, provide reference values of minimum backlash to be used in the gear design. However, increased customers' expectations in vehicle noise eduction have pushed backlash and allowable manufacturing tolerances to even lower limits. This is especially true in the truck market, where engines are quieter because they run at lower speeds to improve fuel economy, but they quite often run at high torsional vibration levels. Furthermore, gear and shaft arrangements in truck transmissions have become more complex due to increased number of speeds and to improve efficiency. Determining the minimum amount of backlash is quite a challenge. This paper presents an investigation of minimum backlash values of helical gear teeth applied to a light-duty pickup truck transmission. An analytical model was developed to calculate backlash limits of each gear pair when not transmitting load, and thus susceptible to generate rattle noise, through different transmission power paths. A statistical approach (Monte Carlo) was used since a significant number of factors affect backlash, such as tooth thickness variation; center distance variation; lead; runout and pitch variations; bearing clearances; spline clearances; and shaft deflections and misalignments. Analytical results identified the critical gear pair, and power path, which was confirmed experimentally on a transmission. The approach presented in this paper can be useful to design gear pairs with a minimum amount of backlash, to prevent double flank contact and to help reduce rattle noise to lowest levels.
This study emphasizes the importance of a closed-loop approach togear design and manufacturing to assure designed root fillet shapes are attained in production, and gears meet the design intent.
The complete Industry News section from the June 2020 issue of Gear Technology.
The complete Industry News section from the November/December 2020 issue of Gear Technology.
News Items About eaton
1 Eaton Implements 3D Metal Printing Program (October 21, 2020)
Eaton has announced its Vehicle Group is implementing a new 3D metal printing program as a part of its Industry 4.0 strategy to reduce de... Read News
2 Eaton's Vehicle Group Leverages Industry 4.0 Technology During Pandemic (July 7, 2020)
Eaton recently announced its Vehicle Group has been leveraging advanced Industry 4.0 technology to help its global operations safely navi... Read News
3 Eaton Recognized for Excellence in Augmented Reality (June 16, 2020)
Power management company Eaton has been named a recipient of IDG’s 2020 CIO 100 award. For more than 30 years, the CIO 100 awards h... Read News
4 Eaton Collaborates with Thogus on Face Shield Design and Production (May 4, 2020)
The global COVID-19 crisis is placing unprecedented demands on government and healthcare organizations, driving a critical need for front... Read News
5 Eaton Cummins Endurant Transmission Becomes Standard Equipment for International Truck (January 17, 2020)
Eaton Cummins Automated Transmission Technologies has announced its Endurant 12-speed automated transmission – one of the lightest,... Read News
6 Hainbuch America Hires Brian Eaton as Regional Sales Manager for Northeastern U.S. (March 3, 2017)
Hainbuch America has announced that Brian Eaton has joined their team as regional sales manager for the northeast region, covering the st... Read News
7 Eaton Brings Forging Operation In-House (September 10, 2013)
Diversified industrial manufacturer Eaton has announced that its South Bend, Indiana, facility has added a $1.9 million cross-wedge-rolli... Read News
8 Eaton Moves Gear Machining to Hastings, NB (May 24, 2007)
Eaton Corp. announced plans consolidate some of its business segments, including those involved in machining gears for differentials. ... Read News
9 Eaton Renews Chemical Mangement Program With Houghton (February 8, 2007)
Houghton FLUIDCARE(r), a division of Houghton International, signed a three-year agreement with Eaton Corp., Cleveland, OH, to provide a... Read News