초록 ▼

The striking mechanism has a hammer barrel (3), which has at least one control opening (23) through which, in an idle position, the air can escape from the hammer barrel (3), and which in a striking position is closed by a covering (25) that prevents the escape of air. To achieve the greatest possi

The striking mechanism has a hammer barrel (3), which has at least one control opening (23) through which, in an idle position, the air can escape from the hammer barrel (3), and which in a striking position is closed by a covering (25) that prevents the escape of air. To achieve the greatest possible sealing off of the at least one control opening (23) and thus high efficiency of the striking mechanism, the covering (25) is molded from an elastomer.

대표청구항 ▼

The invention claimed is: 1. A hand power tool in the form of a striking mechanism, comprising: a pneumatic striking mechanism that has a hammer barrel ( 3), wherein said hammer barrel has at least one control opening ( 23), wherein air can escape from the hammer barrel (3) through the at least one

The invention claimed is: 1. A hand power tool in the form of a striking mechanism, comprising: a pneumatic striking mechanism that has a hammer barrel ( 3), wherein said hammer barrel has at least one control opening ( 23), wherein air can escape from the hammer barrel (3) through the at least one control opening (23) and wherein said at least one control opening (23) is closed, in a striking position by a covering (25) preventing the escape of air, wherein the covering (25) comprises an elastomer, and wherein the hammer barrel ( 3) has a longitudinal axis, and wherein the hammer barrel is supported to be displaceable in the direction of the longitudinal axis in the power tool housing (1), and wherein the covering (25) is disposed to be nondisplaceable in an axial direction in the power tool housing (1), such that the hammer barrel (3) upon an axial displacement into the striking position moves with the at least one control opening (23) to beneath the covering (25). 2. The hand power tool of claim 1, wherein a retaining means (27), supported to be displaceable in the axial direction, for the covering (25) is disposed in the power tool housing (1), and further comprising a means (19, 29, 31) for displacing the retaining means (27) along with the covering ( 25) axially disposed at a transition from the idle position to the striking position, whereby the covering (25) comes to rest above the at least one control opening (23) in the hammer barrel ( 3). 3. The hand power tool of claim 2, wherein the means for displacing the retaining means and cover comprise a snap head die ( 19), wherein the snap head die (19) is supported in the hammer barrel (3) and is displaced against a machining point by a tool (15) introduced into the hammer barrel (3) when the tool (15) is pressed upon, and wherein the snap head die (19) has a stop (29, 31) that transmits an axial motion of the snap head die (19) to the retaining means (27). 4. The hand power tool of claim 3, wherein the stop is a disk (29), wherein said disk is placed on the snap head die (19) and protrudes with at least one arm (31) through an opening ( 33) in the hammer barrel (3) as far as the retaining means ( 27) surrounding the hammer barrel (3). 5. The hand power tool of claim 2, wherein the retaining means (27) for the covering (25) is embodied such that the retaining means enables play of the covering (25) in the radial direction relative to the hammer barrel (3). 6. The hand power tool of claim 1, wherein the covering is a control sleeve (25) surrounding the hammer barrel (3).