Machine element or mechanism – Gearing – Interchangeably locked
Patent
1991-05-28
1992-06-02
Wright, Dirk
Machine element or mechanism
Gearing
Interchangeably locked
74360, F16H 308
Patent
active
051177021
ABSTRACT:
A sixteen forward speed, four reverse speed transmission is provided having a very high efficiency and excellent shift quality. The gear ratios are selected so that a relatively large ratio spacing is provided between each gear step in the low-speed PTO usage range and in the high-speed transport usage range, while a much smaller gear ratio spacing is provided in the intermediate tillage or field usage range. The gear ratios are selected to minimize the number of clutches being changed to shift from one gear to the next, with minimal speed and momentum differences required inside the transmission during each shift. Just two shifts have a large ratio change, and they are positioned in locations having minimal usage, thereby minimizing operator awareness of these gear ratio spacings. The total number of meshes through the transmission is minimized to provide maximum efficiency.
REFERENCES:
patent: 4549443 (1985-10-01), White
patent: 4615240 (1986-10-01), Weiss
patent: 4676116 (1987-06-01), Nerstad et al.
patent: 4771647 (1988-09-01), Stevens
patent: 4782714 (1988-11-01), Schletzbaum et al.
patent: 4785682 (1988-11-01), Nishimura et al.
patent: 4858495 (1989-08-01), Horsch
Johnson Douglas R.
Malm Donald I.
Puetz Craig A.
Rodeghiero Reno A.
Deere & Company
Wright Dirk
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