Gear change mechanism

Details Gear change mechanism Gear change mechanism

1984-09-05

1987-02-17

Staab, Lawrence

Machine element or mechanism

Gearing

Interchangeably locked

74346, 74421R, F16H 322

Patent

active

046430377

ABSTRACT:
A gear change mechanism for a machine tool in which shifting forks with sliding gears and constant mesh gearing using clutch and/or brake shifting is eliminated. A shiftable gear mechanism is presented in a gear train for meshing engagement with any one of a plurality of gears for selectively varying the speed of the machine spindle. The shiftable gear mechanism includes a first rotatable shaft and a second shaft connected to a cluster gear positioned to slide and rotate the second shaft in relation to the first shaft. A cylinder apparatus is connected coaxially to the second shaft to slide the second shaft in a reciprocating manner along the first shaft so as to move the cluster gear and vary the gear ratios between the cluster gear and the other gears in the gear train. A bearing assembly is also utilized in conjunction with the second slidable shaft so as to prevent any sliding action between the cluster gear and the shifting mechanism.

REFERENCES:
patent: 1674200 (1928-06-01), Gatten
patent: 3225620 (1965-12-01), Dubin
patent: 3631945 (1972-01-01), Ollearo
patent: 4389137 (1983-06-01), Riedhl
patent: 4449866 (1984-05-01), Lohneis et al.

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