Hydromechanical transmission with three simple planetary assemblies, one sun gear being mounted on the output shaft and the other two on a common shaft connected to an input-driven hydraulic module

Patent · Sun Jan 01 00:00:00 EST 1978

OSTI ID:863181

Weseloh, William E ^[1]

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1. San Diego, CA

A power transmission having three simple planetary assemblies, each having its own carrier and its own planet, sun, and ring gears. A speed-varying module is connected in driving relation to the input shaft and in driving relationship to the sun gears of the first two planetary assemblies, these two sun gears being connected together on a common shaft. The speed-varying means may comprise a pair of hydraulic units hydraulically interconnected so that one serves as a pump while the other serves as a motor and vice versa, one of the units having a variable stroke and being connected in driving relation to the input shaft, the other unit, which may have a fixed stroke, being connected in driving relation to the sun gears. The input shaft is also connected to drive the second ring gear and, furthermore is clutchable to the carrier of the third planetary assembly. A brake grounds the first carrier in the first range and in reverse and causes drive to be delivered to the output through the first ring gear in a hydrostatic mode. The carrier of the second planetary assembly drives the ring gear of the third planetary assembly, which is clutchable to the output shaft, and the sun gear of the third planetary assembly is mounted rigidly to the output shaft.

• Research Organization: Orshansky Transmission Corp., San Diego, CA (USA)
• DOE Contract Number: EY-76-C-03-1165
• Assignee: Orshansky Transmission Corporation (New York, NY)
• Patent Number(s): US 4114475
• OSTI ID: 863181
• Country of Publication: United States
• Language: English

Related Subjects

hydromechanical
transmission
simple
planetary
assemblies
sun
gear
mounted
output
shaft
common
connected
input-driven
hydraulic
module
power
carrier
planet
gears
speed-varying
driving
relation
input
relationship
means
comprise
pair
units
hydraulically
interconnected
serves
pump
motor
vice
versa
variable
stroke
unit
fixed
drive
furthermore
clutchable
third
assembly
brake
grounds
range
reverse
causes
delivered
hydrostatic
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drives
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speed-varying module
speed-varying means
units hydraulically
brake grounds
causes drive
hydrostatic mode
hydraulic units
fixed stroke
hydraulically interconnected
sun gear
power transmission
driving relation
output shaft
input shaft
planetary assembly
planetary assemblies
driving relationship
sun gears
variable stroke
vice versa
common shaft
hydromechanical transmission
shaft connected
simple planetary
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