Planetary gear transmission systems or components – Differential planetary gearing – Planet pinion is worm gear
Patent
1990-09-28
1991-12-10
Braun, Leslie A.
Planetary gear transmission systems or components
Differential planetary gearing
Planet pinion is worm gear
475227, 475220, 475221, F16H 138
Patent
active
050713957
ABSTRACT:
A differential mechanism is provided with two output shafts 202 and 204 coaxially arranged and extending to wheels 203 and 205 of a vehicle. The differential is provided with a pair of connected discs 221, 209, the disc 209 being rotated about the common axis of the shafts 204, 202 by a drive shaft 206 and a pinion. An intermediate shaft 211 is eccentrically positioned between the two discs 209, 221 and is formed with a circumferentially extending spiral tooth 241. The tooth 241 engages a driving gear 217 fixed to the shaft 202 at one end-portion and the other end-portion of the member 240 provides a member in mesh with the second member 216 fixed to the shaft 204. The teeth of the members 216 and 240 are shaped and positioned so that drive between them is inefficient but they will translate over one another if the member 216 is rotated in the same direction and at the same speed as the member 240. This occurs when the vehicle is cornering and one wheel is increasing in speed while the other is reducing its speed. In the situation where one wheel loses ground adhesion, the differential prevents that wheel from racing and removing drive torque from the other wheel.
REFERENCES:
patent: 1164769 (1915-12-01), Walter
patent: 1252388 (1918-01-01), Bickley
patent: 2900846 (1959-08-01), Lehman
patent: 3095761 (1963-07-01), Hilado
patent: 3292456 (1966-12-01), Saari
patent: 3899939 (1975-08-01), Hilado
patent: 4677535 (1987-05-01), Knight
patent: 4677876 (1987-07-01), Dissett
patent: 4938099 (1990-07-01), Knight
Fahy Arthur J.
Gillies Neil
Braun Leslie A.
IVG Australia Pty. Limited
Wittels Daniel
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