Transmission

Details Transmission Transmission

1992-05-11

1993-09-28

Herrmann, Allan D.

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Fluid pump and motor in one of plural paths to or from...

464149, 74413, F16H 5710

Patent

active

052482839

ABSTRACT:
A vehicle transmission has two shafts parallel to one another. At least one of the shafts is formed of two partial shafts which are in alignment and axially spaced apart. A torsion shaft then connects the two for rotation with each other, but prevents transmission of bending moments between the partial shafts. This structure is particularly useful in a hydrostatic-mechanical power distributing transmission, in which the torsion shaft is radially aligned with the planetary gearsets of the power distributing transmission. The torsion shaft can be considerably thinner than the comparable portion of a conventional shaft, so the overall transmission can be more compact radially. The transmission also is provided with unequal gear ratios, while the planetary gearsets are the same size, allowing a particularly compact structure. Preferably, one of the gear ratios with a small control ratio is used as the primary working range for the transmission to maximize efficiency.

REFERENCES:
patent: 3973880 (1976-08-01), Swedberg
patent: 4090416 (1978-05-01), Hicks
patent: 4132090 (1979-01-01), McDermott
patent: 4378163 (1983-03-01), Jameson et al.
patent: 4854184 (1989-08-01), Jessup
patent: 4934216 (1990-06-01), Sandel et al.

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