Transmission with a first-stage hydrostatic mode and two hydromechanical stages
- San Diego, CA
A power transmission having two planetary assemblies, each having at least one carrier with planet gears, at least one sun gear, and at least one ring gear. A speed-varying module is connected in driving relation to the input shaft and in driving relationship to the sun gear or gears of the first planetary assembly. 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 gear. The input shaft is also connected directly to a sun gear of the second planetary assembly and is further connectable by a clutch to a carrier of the first planetary assembly. Another clutch enables connecting the carrier of the first planetary assembly to a ring gear of the second 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 a ring gear of the first planetary assembly in a hydrostatic mode. The carrier of the second planetary assembly is connected in rigid driving relationship to that first ring gear, and in all ranges these two elements transmit the drive 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 4261226
- OSTI ID:
- 863854
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
first-stage
hydrostatic
mode
hydromechanical
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power
planetary
assemblies
carrier
planet
gears
sun
gear
speed-varying
module
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driving
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input
shaft
relationship
assembly
means
comprise
pair
hydraulic
units
hydraulically
interconnected
serves
pump
motor
vice
versa
variable
stroke
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clutch
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brake
grounds
range
reverse
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rigid
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speed-varying module
speed-varying means
units hydraulically
brake grounds
causes drive
hydrostatic mode
hydraulic units
connected directly
fixed stroke
hydraulically interconnected
sun gear
power transmission
driving relation
output shaft
input shaft
planetary assembly
planetary assemblies
driving relationship
variable stroke
vice versa
planet gears
hydromechanical stages
hydraulic unit
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