Power-Driven Hand Tool
First Claim
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1. A power-driven hand tool, comprising:
- a tool spindle that can be driven in a rotational oscillatory manner about its longitudinal axis and that is configured for carrying a tool;
a transmission housing;
an eccentric coupling drive received within said transmission housing for driving said tool spindle and from which said tool spindle projects outwardly with one end; and
a compensatory mass for compensating oscillations originating from the rotational oscillatory motion of said tool spindle, said compensatory mass being disposed outside of said transmission housing within a chamber that is enclosed by a machine housing;
wherein said eccentric coupling drive comprises a motion reversal mechanism which converts an oscillatory drive motion, generated by the eccentric coupling drive into an oscillatory drive motion of said tool spindle having an opposing direction of rotation;
wherein said eccentric coupling drive comprises an eccentric lever which is pivotally mounted at a first end and, at a second end, is driven via an eccentric; and
wherein said compensatory mass is carried on a side of said eccentric coupling drive that faces away from said eccentric lever.
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Abstract
A power-driven hand tool is disclosed, comprising a tool spindle that can be driven in a rotational oscillatory manner about its longitudinal axis and that is designed to carry a tool, and further comprising a transmission housing, in which there is carried an eccentric coupling drive for driving the tool spindle and from which the tool spindle projects outwardly with one end, wherein, for the purpose of mass compensation of the oscillatory motion of the eccentric coupling drive, a compensatory mass is provided, which is disposed outside of the transmission housing.
18 Citations
20 Claims
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1. A power-driven hand tool, comprising:
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a tool spindle that can be driven in a rotational oscillatory manner about its longitudinal axis and that is configured for carrying a tool; a transmission housing; an eccentric coupling drive received within said transmission housing for driving said tool spindle and from which said tool spindle projects outwardly with one end; and a compensatory mass for compensating oscillations originating from the rotational oscillatory motion of said tool spindle, said compensatory mass being disposed outside of said transmission housing within a chamber that is enclosed by a machine housing; wherein said eccentric coupling drive comprises a motion reversal mechanism which converts an oscillatory drive motion, generated by the eccentric coupling drive into an oscillatory drive motion of said tool spindle having an opposing direction of rotation; wherein said eccentric coupling drive comprises an eccentric lever which is pivotally mounted at a first end and, at a second end, is driven via an eccentric; and wherein said compensatory mass is carried on a side of said eccentric coupling drive that faces away from said eccentric lever. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A power-driven hand tool, comprising:
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a tool spindle that can be driven in a rotational oscillatory manner about its longitudinal axis and that is configured for carrying a tool; a transmission housing; an eccentric coupling drive received within said transmission housing for driving said tool spindle and from which said tool spindle projects outwardly with one end; and a compensatory mass for compensating oscillations originating from the rotational oscillatory motion, said compensatory mass being disposed outside of said transmission housing within a chamber that is enclosed by a machine housing. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A power-driven hand tool, comprising:
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a tool spindle that can be driven in a rotational oscillatory manner about its longitudinal axis and that is configured for carrying a tool; a transmission housing; an eccentric coupling drive received within said transmission housing for driving said tool spindle and from which said tool spindle projects outwardly with one end; and a compensatory mass for compensating oscillations originating from the rotational oscillatory motion, said compensatory mass being disposed outside of said transmission housing within a chamber that is enclosed by a machine housing; wherein said eccentric coupling drive comprises an eccentric lever which is pivotally mounted at a first end and, at a second end, is driven via an eccentric; wherein said compensatory mass is carried on a side of said eccentric coupling drive that faces away from said eccentric lever; and wherein said compensatory mass is dimensioned so that a centre of gravity of any movable parts of said eccentric coupling drive including said compensatory mass coincides substantially with a longitudinal axis of an eccentric lever axle about which said eccentric lever can be swivelled.
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Specification