Transmission mechanism having deceleration function
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United States of America Patent
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Jan 10, 2012
Grant Date -
Apr 7, 2011
app pub date -
Oct 6, 2009
filing date -
Oct 6, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A transmission mechanism having a deceleration function includes a guide screw, a worm wheel set, an intermediary ring, an isolator and a passive sleeve. The worm wheel set is fitted onto the guide screw and includes worm wheel and plural claw arms. A spacing slot is formed between any two adjacent claw arms. The intermediary ring is fitted onto a peripheral edge of each claw arm. The isolator surrounds a peripheral edge of the intermediary ring with one side fixed to an actuator. With plural grooves arranged on a peripheral edge thereof, the passive sleeve is fitted onto the guide screw. An accommodation space is formed among the groove, spacing slot and intermediary ring. Each needle roller is accommodated in the accommodation space and inter-contacted with the claw arm, the intermediary ring and the passive sleeve.
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