Speed controller for motor preventing interference from reverse input
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United States of America Patent
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Jul 23, 2013
Grant Date -
Jan 20, 2011
app pub date -
Mar 18, 2009
filing date -
Mar 21, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A transmission for a motor, which gives a normal rotation and constant speed output to an output cover when a driving shaft of the motor rotates in a normal direction and a normal rotation and speed-changed output to the output cover when the driving shaft of the motor rotates in a reverse direction, is provided. Interference caused by a reverse input can be prevented although rotation is reversely input from the output cover. The driving shaft includes a polygonal outer circumference; a ball-mounting ring is coupled to the outer circumference, the ball-mounting ring including, therein a constant speed ball and a speed changing ball spaced apart from each other by a predetermined distance so that upper and lower sides of them protrude; and the ball-mounting ring is frictionally fixed by an additionally fixed friction pin.
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