Keywords
Citation
(2006), "Ultra slim-line gears", Aircraft Engineering and Aerospace Technology, Vol. 78 No. 5. https://doi.org/10.1108/aeat.2006.12778ead.003
Publisher
:Emerald Group Publishing Limited
Copyright © 2006, Emerald Group Publishing Limited
Ultra slim-line gears
Ultra slim-line gears
Keywords: Aircraft components
Harmonic Drive, a manufacturer of precision gears and actuators, has introduced an new range of lightweight, ultra-compact gears (Plate 2), specifically developed for applications where operating space or weight are limited, including in-flight aircraft systems. Called the CSD Series the new gear component sets are said to incorporate proven and high efficiency Harmonic Drive technology, weigh from as little as 0.06kg, offer a particularly flat profile and a reduction in axial length of more than 60 per cent by comparison with existing products.
Plate 2
Harmonic drive launches ultra slim- line gears
According to Harmonic Drive, its new high efficiency CSD gears also provide extremely precise motion control and low levels of start-up and back-driving torque; transmission accuracy is less than 1.0 arc minute, repeatability is within ^0.1 arc minute and, depending on unit size, start-up torque can be as low as 2.4Ncm, with the maximum momentary torque rating being up to l,560Nm. In addition, the use of Harmonic Drive technology eliminates backlash effects, while the overall construction of each gear set allows a central hollow shaft to be incorporated, so that cables and pipes can easily be routed to minimise space requirements.
In common with all Harmonic Drive component sets, the new CSD Series features specially developed and patented tooth profiles, with an enlarged tooth root radius.
This reportedly increases the region of tooth engagement by comparison with conventional involute gear mechanisms, from around 15 per cent to 30 per cent, providing significant improvements in stiffness and torque capacity.
In addition, the design and construction of the new CSD gears means that they are quick and easy to install, as well as being robust, fully protected against corrosion and virtually maintenance-free. The new CSD component sets are manufactured in a range of seven different sizes to meet the needs of most applications and can be supplied on short delivery times.
Details available from: Harmonic Drive UK Ltd, Tel: +44 (0)1785 245190, Fax: +44 (0)1785 240126, web site: www.harmonicdrive.co.uk