Engine-generator set with integral gear reduction
First Claim
1. In a stationary-mounted apparatus including an engine powering a generator, and wherein the generator includes a first shaft supported by a pair of bearings and concentric with and driving a generator armature, the improvement wherein:
- the first shaft has a shaft end extending away from the bearings;
a first gear is concentrically mounted on the shaft end and has a first pitch diameter;
the generator includes a second shaft in spaced relationship to the first shaft;
the second shaft is concentric with and coupled to the engine crankshaft and has a second gear mounted thereon in engagement with the first gear; and
the second gear has a pitch diameter less than the pitch diameter of the first gear.
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Accused Products
Abstract
In an engine-generator set, the generator has a first shaft driving a generator armature and also has a second shaft in spaced relationship to the first shaft. The second shaft is coupled to the engine and there is a gear on each of the shafts which provides a "step-down" gear reduction for powering the generator at, e.g., 1800 rpm, where the engine speed is greater than 1800 rpm. Preferably, the engine is coupled to the generator armature shaft through a torsional coupling for isolating engine vibration from the generator.
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Citations
10 Claims
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1. In a stationary-mounted apparatus including an engine powering a generator, and wherein the generator includes a first shaft supported by a pair of bearings and concentric with and driving a generator armature, the improvement wherein:
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the first shaft has a shaft end extending away from the bearings; a first gear is concentrically mounted on the shaft end and has a first pitch diameter; the generator includes a second shaft in spaced relationship to the first shaft; the second shaft is concentric with and coupled to the engine crankshaft and has a second gear mounted thereon in engagement with the first gear; and the second gear has a pitch diameter less than the pitch diameter of the first gear. - View Dependent Claims (2, 3, 4, 5)
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6. In an apparatus including an engine powering a generator, and wherein the generator includes a first shaft driving a generator armature, the improvement wherein:
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the first shaft is supported by inward and outward spaced-apart bearings mounted in the generator; the first shaft has a cantilever shaft end protruding outwardly away from the outward bearing and toward the engine; the cantilever shaft end has a first gear affixed thereto; the apparatus includes a second shaft in spaced relationship to the first shaft; the second shaft has a second gear affixed thereto, such second gear being in driving engagement with the first gear; and the engine has a crankshaft and the second shaft is coupled to the engine in axial alignment with the crankshaft. - View Dependent Claims (7, 8, 9, 10)
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Specification