| 摘要 |
<p>A hammer comprising: a housing (2); a motor mounted within the housing; a tool holder (8) rotatably mounted on the housing (2) for holding a cutting tool; a striker (24;874;924) mounted in a freely slideable manner within the housing, for repetitively striking an end of a cutting tool when a cutting tool is held by the tool holder (8), which striker is reciprocatingly driven by the motor, when the motor is activated, via a drive mechanism; wherein the drive mechanism comprises: a pivoting drive arm (246;857;914) pivotally mounted within the housing (2) at one end and which is drivingly connected to the striker (242;874;924) a pivotal drive mechanism connected to the pivoting drive arm (246;857;914) which converts a rotary movement generated by the motor to an oscillating pivotal movement of the pivoting drive arm (246;857;914) about its pivot point; characterised in that the size of the amplitude of the oscillations of the pivoting drive arm (246;857;914) can be adjusted.</p> |
