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The invention relates to a hand-held power tool for predominantly percussively driven tool attachments, in particular hammer drills and/or a chisel-action hammers. The power tool has a percussion axis and an intermediate shaft that is parallel to the percussion axis and which has a first stroke gene

The invention relates to a hand-held power tool for predominantly percussively driven tool attachments, in particular hammer drills and/or a chisel-action hammers. The power tool has a percussion axis and an intermediate shaft that is parallel to the percussion axis and which has a first stroke generating device having a first stroke element for a percussion drive. Additionally, at least one additional second stroke generating device having at least one second stroke element is provided for driving a counter oscillator that is arranged on or about the intermediate shaft and can be driven by the intermediate shaft. A phase displacement that is different from zero and that is unequal to 180° takes place between a movement of the first stroke element and a movement of at least one second stroke element.

대표청구항 ▼

1. A hand-held power tool for insert tools primarily driven in a percussive fashion, in particular a rotary hammer and/or chisel hammer, comprising: an impact axis;an intermediate shaft parallel to the impact axis;a first stroke producing device for an impact drive, the first stroke producing device

1. A hand-held power tool for insert tools primarily driven in a percussive fashion, in particular a rotary hammer and/or chisel hammer, comprising: an impact axis;an intermediate shaft parallel to the impact axis;a first stroke producing device for an impact drive, the first stroke producing device having a stroke element; andat least one additional second stroke producing device that is situated in or on the intermediate shaft, which has the capacity to be driven by means of the intermediate shaft, which has at least one second stroke element, and which is for driving a counter-oscillator,wherein between a motion of the first stroke element and a motion of the at least one second stroke element, a phase shift is provided that is not equal to zero and is also not equal to 180°. 2. The hand-held power tool as recited in claim 1, wherein the phase shift is not equal to 90°. 3. The hand-held power tool as recited in claim 2, wherein counter-oscillator has at least one counter-oscillator mass that is guided along a linear or nonlinear movement path, in particular along a straight line or arc. 4. The hand-held power tool as recited in claim 1, wherein counter-oscillator has at least one counter-oscillator mass that is guided along a linear or nonlinear movement path, in particular along a straight line or arc. 5. The hand-held power tool as recited in claim 1, wherein the counter-oscillator has a center-of-gravity path situated close to the impact axis, in particular a center-of-gravity path that is oriented parallel to, preferably coaxial to, the impact axis. 6. The hand-held power tool as recited in claim 1, wherein the second stroke producing device is equipped with a clutch device that is able to couple the second stroke producing device to the intermediate shaft for co-rotation. 7. The hand-held power tool as recited in claim 6, wherein the clutch device is embodied in the form of a meshing clutch in which in particular, an axial movement path is provided between an engaged state and a disengaged state. 8. The hand-held power tool as recited in claim 7, wherein a stroke of the stroke element of the second stroke producing device changes in linear fashion along the movement path. 9. The hand-held power tool as recited in claim 1, wherein the second stroke producing device has in addition a deflecting element that is in particular able to drive a second counter-oscillator. 10. The hand-held power tool as recited in claim 1, wherein the first stroke producing device is embodied in the form of a first crank drive, which includes a connecting rod and a crank disk equipped with an eccentric pin, with the connecting rod functioning as a first stroke element. 11. The hand-held power tool as recited in claim 10, wherein the second stroke producing device is embodied in the form of a wobble drive, which includes at least one second drive sleeve supporting a raceway, a wobble bearing, and a wobble plate with a wobble pin situated on the wobble plate. 12. The hand-held power tool as recited in claim 10, wherein the second stroke producing device is embodied in the form of a connecting rod drive in which the counter-oscillator is operatively connected to the intermediate shaft by means of a connecting rod. 13. The hand-held power tool as recited in claim 1, wherein a first bevel gear is situated on the intermediate shaft and the intermediate shaft is able to drive the first bevel gear in rotary fashion. 14. The hand-held power tool as recited in claim 13, wherein a second bevel gear is provided, which is situated on a bevel gear shaft perpendicular to the intermediate shaft and is connected to it for co-rotation and the first bevel gear is able to drive the second bevel gear in rotary fashion. 15. The hand-held power tool as recited in claim 14, wherein the crank disk supporting the eccentric pin is situated on the bevel gear shaft and is connected, preferably detachably, to the bevel gear shaft for co-rotation. 16. The hand-held power tool as recited in claim 14, wherein the second stroke producing device is embodied in the form of a cam drive, in particular, a cylindrical cam drive with a curved track, which is situated on a circumference surface and deflects the at least one additional stroke element, in which the at least one second stroke element deflects the counter-oscillator along the curved track. 17. The hand-held power tool as recited in claim 16, wherein the cam drive is embodied in the form of an end-surface cam drive or in the form of a cam drive equipped with a surface profile, in which a pressing element acts on the counter-oscillator, making it possible for the counter-oscillator to be pressed against the surface profile and deflected so that it follows the surface profile. 18. The hand-held power tool as recited in claim 1, wherein a motion sequence of the at least one additional stroke element has a time behavior that differs from a sinusoidal shape. 19. The hand-held power tool as recited in claim 1, wherein a deflection of the first stroke element has a first frequency and a deflection of the second stroke element of the at least one additional second stroke producing device has a second frequency, in particular one that differs from the first frequency, and the second frequency is in particular approximately half the first frequency. 20. The hand-held power tool as recited in claim 1, wherein between the first stroke producing device and the at least one additional second stroke producing device, a bearing device is provided, which is affixed to a machine housing of the hand-held power tool and is for supporting the intermediate shaft in rotary fashion in the machine housing.