Two-speed transfer case
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United States of America Patent
Stats
-
Jul 15, 2008
Grant Date -
Jun 15, 2006
app pub date -
Dec 12, 2005
filing date -
Nov 24, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A transfer case includes a two-speed range unit, a mode clutch, an actuation mechanism and a control system. The actuation mechanism includes an electric motor, an actuator shaft driven by the motor, a range actuator assembly and a mode actuator assembly. The range actuator assembly includes range, a cam driven by the actuator shaft and a shift fork having a follower retained in a groove formed in the cam and a fork engaging a shift collar associated with the range unit. The mode actuator assembly has a range cam member with cam surfaces and a control gear with rollers engaging the cam surfaces. The control gear is rotatively driven by the actuator shaft. The cam member is axially moveable for controlling engagement of the mode clutch. An anti-rotation mechanism limits rotation of the cam member in response to continued rotation of the control gear.
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