From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Suggestion for overcoming pinion unmeshing issues in the 'India' four-speed gearbox.
Identifier | ExFiles\Box 6\4\ 04-page101 | |
Date | 21th March 1925 | |
Secret. Y5310 AJ81/H.{Arthur M. Hanbury - Head Complaints} 21.3.25. RE "INDIA" FOUR SPEED GEAR BOX. In connection with the unmeshing of pinions on this box, we would like to make the following suggestion for overcoming this trouble. The scheme is a combination of the relieved splines and torsionally free pinions, in conjunction with the slightly spiral splines as used by Lanchester. The idea is to first of all produce roughly a splined shaft and relieve this in the middle as done hitherto, and afterwards make the unrelieved splined portion at each end with a very slight helix, one end being the opposite helix to the other. The idea of using the torsionally free pinions is only so that the opposite hand of broaching can be done conveniently in each portion of the combined gear. Naturally, in this scheme, no diametral relief would be given to the shaft for the distance of the spline relief, and reasonably large radii would be used on the grinding wheel for relieving the splines, so as to permit of easy entering of the pinions on Contd. | ||