Tool driving or impacting – Drive adjustable to completely change kind of drive – Adjustable to impacting device
Patent
1996-08-06
1997-08-05
Hail, III, Joseph J.
Tool driving or impacting
Drive adjustable to completely change kind of drive
Adjustable to impacting device
173216, 173217, 173 13, B23B 4502
Patent
active
056532946
ABSTRACT:
A hammer drill has a motor disposed in a housing, and the motor has a rotatable armature shaft. A pinion at an end of the armature shaft drives an axially displaceable intermediate gear mounted on an intermediate shaft. An intermediate pinion is mounted for rotation with the intermediate gear and drives an output gear fixed about the midsection of an axially displaceable output shaft. The intermediate gear has input and output faces. The input face is associated with a first cam mechanism for generating reciprocating motion. The output face is engageable with an impact face of the output gear to transmit axial displacement therebetween. A second cam mechanism is affixed to the housing and axially spaced from the first cam mechanism. The first and second cam mechanisms are engageable by sufficiently axially displacing the output shaft so that the output gear impact face abuts the intermediate gear output face axially displacing the intermediate gear so that the first and second cam mechanisms abut each other. The first and second cam mechanisms are configured with respect to each other to generate reciprocating motion and cause the intermediate gear to reciprocate axially as the first cam mechanism rotates relative to the second cam mechanism while the first and second cam mechanisms are engaged. The output face of the intermediate gear transmits the reciprocating motion to the output gear impact face to axially reciprocate the output shaft as it rotates.
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Hail III Joseph J.
Ryobi North America
Stelacone Jay A.
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