초록 ▼

A power tool (1) having a striking means (5), by which a percussive tool (2) that can be driven at least partially along an axis (A) struck directly and having a flushing bore (4) extending at least partially longitudinally through a tool shank (3), and having a flushing head (6) having a radially i

A power tool (1) having a striking means (5), by which a percussive tool (2) that can be driven at least partially along an axis (A) struck directly and having a flushing bore (4) extending at least partially longitudinally through a tool shank (3), and having a flushing head (6) having a radially inwardly open transverse bore hole (8) connected in a flow-through fashion with a fluid channel (7). The flushing head (6) has at least one hollow cylindrical sleeve-like guide surface (9), which is fitted for an insertion end (10) of the striking tool (2). The striking means (5) sealed by a seal (11a, 11b) is cup-like. The striking means (5) is moveably guided and made fluid tight by the seal (11a, 11b) to embrace the machine-side part of the insertion end (10) having the machine-side open flushing bore (4).

대표청구항 ▼

What is claimed is: 1. A power tool, comprising striking means (5) for directly striking a percussive tool (2) at least partially displaceable along an axis (A) and having a flushing bore (4) extending at least partially longitudinally through a shank (3) thereof and open at a power tool side there

What is claimed is: 1. A power tool, comprising striking means (5) for directly striking a percussive tool (2) at least partially displaceable along an axis (A) and having a flushing bore (4) extending at least partially longitudinally through a shank (3) thereof and open at a power tool side thereof and an insertion end (10), the flushing bore (4) opening at a power tool-side thereof at the insertion end (10); a flushing head (16) having a fluid channel (7) for feeding flushing fluid thereto, at least one, opening radially inwardly, transverse borehole (8) connected in a flow-through fashion with the fluid channel (7), and at least one hollow cylinder-shaped, guide surface (9) for fittingly receiving an insertion end (10) of the percussive tool (2); and at least one seal (11a, 11b) for insuring a flowtight displacement of the striking means (5), the striking means (5) being formed as a cup-shaped member for flowtightly embracing a power tool-side of the insertion end (10) together with a power tool-side opening of the flushing bore (4), wherein the striking means (5) extends axially into the flushing head (6) on a percussive-tool side thereof, wherein the power tool further comprises a flushing seal (14) arranged between the flushing head (6) and the striking means (5), and wherein the flushing head (6) has a leakage opening (15) opening outwardly relative to a leakage space (16) provided on a power tool-side side of the flushing seal (14). 2. The power tool of claim 1, wherein the flushing head (6) comprises a coaxial, located radially inwardly, bearing sleeve (12) forming the hollow cylinder-shaped guide surface (9), the transverse borehole (8) extending through a wall of the bearing sleeve (12). 3. The power tool of claim 1, wherein the cup-shaped member has a hollow cylinder part having a diameter (D) and an axial length (L) that exceeds the diameter (D) by more than three times. 4. The power tool of claim 1, wherein a plurality of flow grooves (18) extending the axis (A) is provided on an inner surface (17) of the cup-shaped striking means (5). 5. The power tool of claim 1, further comprising a guide sleeve (19), and wherein the striking means (5) extends at least partially into the guide sleeve (19). 6. The power tool of claim 5, wherein the guide sleeve (19) is rotable. 7. The power tool of claim 6, wherein the at least one seal (11a) is formed as an axially oscillating seal arranged between the guide sleeve (19) and the striking means (5), and wherein the power tool further comprises a rotary seal (11b) arranged between the guide sleeve (19) and a housing (20) of a striking mechanism. 8. The power tool of claim 1, wherein the striking means (5) comprises rotary drive means (21). 9. The power tool of claim 1, wherein the striking means comprises rotary driven means (23). 10. The power tool of claim 1, wherein the striking means (5) forms, on percussive tool-side thereof, a circular striking face (25). 11. The power tool of claim 1, wherein the cup-shaped member has a cup bottom (27) facing the percussive tool (2) and forming a spherical striking surface (28). 12. The power tool (5) of claim 8, wherein the striking means (5) has rotation drive grooves extending parallel to the axis (A), into which rotation drive bodies (22) affixed in the guide sleeve (19) engage. 13. The power tool of claim 9 wherein the striking means (5) has rotation drive webs extending parallel to the axis (A) that can fittingly engage in drive grooves (24) of the insertion end (10).