Hydraulic system for a ratio change transmission

Patent · Thu Jan 01 00:00:00 EST 1981

OSTI ID:863917

Kalns, Ilmars ^[1]

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1. Northville, MI

Disclosed is a drive assembly (10) for an electrically powered vehicle (12). The assembly includes a transaxle (16) having a two-speed transmission (40) and a drive axle differential (46) disposed in a unitary housing assembly (38), an oil-cooled prime mover or electric motor (14) for driving the transmission input shaft (42), an adapter assembly (24) for supporting the prime mover on the transaxle housing assembly, and a hydraulic system (172) providing pressurized oil flow for cooling and lubricating the electric motor and transaxle and for operating a clutch (84) and a brake (86) in the transmission to shift between the two-speed ratios of the transmission. The adapter assembly allows the prime mover to be supported in several positions on the transaxle housing. The brake is spring-applied and locks the transmission in its low-speed ratio should the hydraulic system fail. The hydraulic system pump is driven by an electric motor (212) independent of the prime mover and transaxle.

• Assignee: Eaton Corporation (Cleveland, OH)
• Patent Number(s): US 4275617
• OSTI ID: 863917
• Country of Publication: United States
• Language: English

Related Subjects

hydraulic
ratio
change
transmission
disclosed
drive
assembly
10
electrically
powered
vehicle
12
transaxle
16
two-speed
40
axle
differential
46
disposed
unitary
housing
38
oil-cooled
prime
mover
electric
motor
14
driving
input
shaft
42
adapter
24
supporting
172
providing
pressurized
oil
flow
cooling
lubricating
operating
clutch
84
brake
86
shift
ratios
allows
supported
positions
spring-applied
locks
low-speed
fail
pump
driven
212
independent
transaxle housing
unitary housing
adapter assembly
speed ratio
assembly allows
electrically powered
ratio change
prime mover
housing assembly
electric motor
input shaft
transmission input
two-speed ratios
two-speed transmission
axle differential
powered vehicle
oil flow
oil-cooled prime
providing pressurized
drive assembly
pressurized oil
low-speed ratio
drive axle
speed ratios
/475/74/