Power transmission device and portable power working machine provided with the same
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United States of America Patent
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-
Sep 5, 2006
Grant Date -
Feb 19, 2004
app pub date -
Aug 13, 2003
filing date -
Aug 14, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A power transmission device is disclosed which is capable of easily, swiftly and appropriately altering the distance between the axes of a pair of transmission wheels such as pulleys, enabling an endless belt to be kept under constant and appropriate tension without necessitating a tension roller. This power transmission device comprises an endless belt wound around a pair of transmission wheels; and a cam-type adjusting mechanism which is interposed between a driving side supporting member and a driven side supporting member and configured to adjust a distance between the axes of the wheels. This cam-type adjusting mechanism comprises a supporting shaft secured to either the driving side supporting member or the driven side supporting member and disposed parallel to the rotational axes of the wheels; and a cam rotatably secured via a manipulating boss member to the supporting shaft.
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