ELECTRIC VEHICLE POWER TRANSMISSION APPARATUS
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United States of America Patent
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Issued Date -
Jan 15, 2015
app pub date -
Apr 15, 2013
filing date -
Apr 17, 2012
priority date (Note) -
Abandoned
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Abstract
A power transmission device is embedded in an electric vehicle equipped with an electric motor and a transmission. The transmission includes a first reduction mechanism and a second reduction mechanism. The power transmission device also includes a spline hub coupled to an output side of the first reduction mechanism, a clutch plate coupled to an input side of the second reduction mechanism, and a coupling portion. The coupling portion is disposed between the spline hub and the clutch plate, and includes a damper mechanism configured to absorb a vibration from the spline hub and transmit a torque to the clutch plate, and a torque limiter configured to transmit the torque and to limit transmission of the torque when the torque is greater than or equal to a predetermined magnitude.
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