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AssigneeRobert Bosch GmbH
InventorAldo Di Nicolantonio
Life of this patent
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Abstract
In a hand-guided, motor-driven compass saw machine (1), having a housing (2) that contains a saw blade (3) that can be moved in the vertical direction by a lifter rod (4), and having an oscillation mechanism that has a roller lever (5), which is contained in the housing so that it can rotate around a horizontal first axis (50) and supports a roller (51) that remains in contact with the saw blade (3) and rotates around a horizontal second axis (55), which oscillation mechanism also has a fork lever (6) that periodically deflects the roller lever (5), an adaptive adjustment of the forward saw progress to the advancing force of the compass saw machine (1) is achieved by virtue of the fact that the oscillation mechanism produces an oscillation of the saw blade (3) as a function of the pressure.
Claims10
A motor-driven compass saw machine (1), having a housing (2) that contains a longitudinally moving lifter rod (4), which supports a saw blade (3), and an oscillation mechanism that is able to impart a variable oscillation stroke, which is oriented lateral to the longitudinal motion, to the saw blade (3),
- wherein the oscillation mechanism includes means for automatically adjusting the oscillation stroke smoothly between the maximum and minimum stroke during the sawing process, as an automatic response to a function of the pressure of the saw blade (3) against a work piece to be sawn, and
- a roller lever (5) which is disposed in the housing (2) and supports a roller (51) that remains in contact with the saw blade (3);
- and
- wherein said means for automatically adjusting the oscillation stroke comprises a spring element (53) which acts on said roller lever (5) such that said spring element (53) is compressed further as the pressure of the saw blade against a work piece to be sawn increases and a larger oscillation is produced.
Dependencies are inferred from the claim text.