Power transfer mechanism for 4WD vehicles with low effort mode shift system
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United States of America Patent
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Dec 22, 2015
Grant Date -
Sep 11, 2014
app pub date -
May 16, 2014
filing date -
Jun 13, 2012
priority date (Note) -
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Abstract
A power transfer mechanism for a four-wheel drive vehicle includes a first shaft for transferring torque to a first driveline, a second shaft for transferring torque to a second driveline, and a transfer mechanism driving the second shaft. A mode clutch drivingly connects the first shaft to the transfer mechanism and includes a clutch gear-driven by the transfer mechanism and a mode sleeve. A sprocket associated with the transfer mechanism has internal spline teeth meshed with external spline teeth on the second shaft with a predetermined amount of backlash therebetween. A ball cam mechanism centers the backlash and permits relative rotation of the transfer mechanism and the mode sleeve to circumvent a blocked mode shift.
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