Method for producing a motor rotor
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United States of America Patent
Stats
-
Apr 28, 2015
Grant Date -
Feb 13, 2014
app pub date -
Apr 22, 2011
filing date -
Apr 22, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In a method for producing a motor rotor, a lamination stack made up of stacked thin steel sheets each formed with a through hole, the lamination stack having a shaft bore formed of the through holes aligned with one another, is retained as a rotor core in a thickness direction with a pair of jigs from both sides, and a shaft is inserted into the shaft bore and joined to the lamination stack by shrink fitting. Each jig includes a shaft hole, a radially inner peripheral portion for holding a peripheral edge of the shaft bore of the lamination stack at a position, in a radial direction of the shaft hole, surrounding the shaft hole radially inside; and a radially outer peripheral portion for holding the outer periphery of the lamination stack. The radially inner and outer peripheral portions are positioned at different heights in a jig height direction.
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