Counterweight Mechanism and Power Tool
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United States of America Patent
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Issued Date -
Dec 24, 2015
app pub date -
Jun 23, 2015
filing date -
Jun 23, 2014
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Abstract
A counterweight mechanism for a linearly reciprocating mechanism includes a counterweight configured to balance an inertial force of the reciprocating mechanism, a driving element configured to drive the counterweight to linearly reciprocate, a guiding element configured to guide the counterweight to linearly reciprocate, and an auxiliary driving mechanism configured to auxiliarily drive the counterweight to linearly reciprocate. The auxiliary drive mechanism is configured to exert a force on the counterweight in a direction of the linear reciprocation of the counterweight, which direction alternatingly changes, to promote the linear reciprocation. This configuration enables the reduction or avoidance of vibration and noise of the counterweight mechanism and prolongs a service lifetime thereof. The counterweight mechanism can be included in a power tool.
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