초록 ▼

A handheld power tool, including a tool socket on a drive shaft for purposes of holding a tool, the drive shaft executing a rotating and partially tangentially striking movement using a tangential striking mechanism drivable by a drive. The tangential striking mechanism has an anvil associated with

A handheld power tool, including a tool socket on a drive shaft for purposes of holding a tool, the drive shaft executing a rotating and partially tangentially striking movement using a tangential striking mechanism drivable by a drive. The tangential striking mechanism has an anvil associated with the drive shaft and a hammer associated with the drive, movable with respect to each other so as to strike each other axially when under the effect of the force of at least one first spring, and to strike each other tangentially when the anvil and the hammer are rotated. The hammer has a main mass, and an extra mass that is under the effect of a second spring couplable to the main mass.

대표청구항 ▼

1. A handheld power tool comprising: a tangential striking mechanism drivable by a drive;a drive shaft;a tool socket on the drive shaft capable of holding a tool,the drive shaft capable of executing a rotating and partially tangentially striking movement by the tangential striking mechanism, the tan

1. A handheld power tool comprising: a tangential striking mechanism drivable by a drive;a drive shaft;a tool socket on the drive shaft capable of holding a tool,the drive shaft capable of executing a rotating and partially tangentially striking movement by the tangential striking mechanism, the tangential striking mechanism having an anvil associated with the drive shaft as well as a hammer associated with the drive, the anvil and hammer being movable with respect to each other so as to strike each other axially when under the effect of the force of at least one first spring, and so as to strike each other tangentially when the anvil and the hammer are rotated, the hammer having a main mass; andan extra mass under the effect of the force of a second spring and detachably couplable to the main mass. 2. The handheld power tool as recited in claim 1 wherein, in a first operating state, the main mass of the hammer and the anvil are movable with respect to each other so as to strike each other axially only under the effect of the force of the first spring, and so as to strike each other tangentially when the main mass is rotated. 3. The handheld power tool as recited in claim 1 wherein, in a second operating state, the main mass and the extra mass of the hammer and the anvil are movable with respect to each other so as to strike each other axially only under the effect of the force of the at least one first spring and a second spring, and so as to strike each other tangentially when the main mass is rotated. 4. The handheld power tool as recited in claim 1 wherein the extra mass is detachably couplable to the main mass by a coupling mechanism, the coupling mechanism including a second spring acting upon the extra mass. 5. The handheld power tool as recited in claim 4 wherein the coupling mechanism has a housing cage in which the second spring is pre-tensioned against the extra mass and the housing cage. 6. The handheld power tool as recited in claim 1 wherein the coupling mechanism is movable along a guiding link. 7. The handheld power tool as recited in claim 6 wherein the coupling mechanism is axially movable or rotatable by a user. 8. The handheld power tool as recited in claim 1 wherein, in a second operating state, the main mass and the extra mass are coupled to each other with a positive fit. 9. The handheld power tool as recited in claim 1 wherein the extra mass has a striking surface that, when the extra mass and the main mass are coupled together, extends axially up to or beyond an extension of the main mass so as to stop against an anvil striking surface. 10. The handheld power tool as recited in claim 1 wherein the main mass has a striking surface that, when the extra mass and the main mass are coupled together, extends axially beyond an extension of the extra mass so as to stop against an anvil striking surface. 11. The handheld power tool as recited in claim 1 wherein the extra mass is detachably couplable to the main mass by a coupling mechanism and wherein, in a first operating state, the coupling mechanism is secured against moving by a securing element. 12. The handheld power tool as recited in claim 1 wherein weights of the main mass and the extra mass and stiffness values of the at least one first spring and a second spring are configured in such a way that a resonance frequency of the tangential striking mechanism remains similar in a first and second operating state. 13. The handheld power tool as recited in claim 1 wherein drive is a force transmitting striking drive for the tangential striking mechanism that acts upon the hammer and/or the anvil, and via the force-transmitting striking drive, the hammer and/or the anvil can be moved with respect to each other along a guiding contour so as to strike each other axially, and so as to strike each other tangentially when a guiding contour is rotated. 14. The handheld power tool as recited in claim 1 wherein the drive includes a motor and/or a transmission. 15. An impact screwdriver comprising: a tangential striking mechanism drivable by a drive;a drive shaft;a tool socket on the drive shaft capable of holding a screwdriver,the drive shaft capable of executing a rotating and partially tangentially striking movement by the tangential striking mechanism, the tangential striking mechanism having an anvil associated with the drive shaft as well as a hammer associated with the drive, the anvil and hammer being movable with respect to each other so as to strike each other axially when under the effect of the force of at least one first spring, and so as to strike each other tangentially when the anvil and the hammer are rotated, the hammer having a main mass; andan extra mass under the effect of the force of a second spring and detachably couplable to the main mass.