Automatic speed shifting device
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United States of America Patent
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Jul 6, 2004
Grant Date -
N/A
app pub date -
Mar 22, 2003
filing date -
Mar 22, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An automatic speed shifting device includes a frame having a transmission device and a torque feedback device received therein. The torque feedback device has a torque resistant member so that when the load torque is smaller than its resistant torque, the speed reduction mechanism of the transmission device is remained at the first stage speed status. When the load torque is larger than its resistant torque, a pushing wheel devices a clamp to compress a shifting gear so that the speed reduction mechanism is shifted to another stage of speed. The speed reduction mechanism of the transmission device automatically shifts the speed reduction mechanism when the load torque increases or reduces such that the mechanical efficiency of the transmission device can be increased.
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