| 摘要 |
PURPOSE: A breaker and its arrangement are provided to produce a large breaker with reduced expense and to sufficiently correspond different dimensions of the breaker by interposing a cylinder between a front and a rear heads and coupling it by alternative coupling component. CONSTITUTION: The breaker comprises in general a chisel(1), a front head(3), a cylinder(5), a rear head(7) and a coupling component(9). The front head(9) receives the chisel(1) and is provided with a threshold having a constant angle at both sides. The cylinder(5) is engaged into the front head and has a piston to move the chisel inside. The rear head is connected to the cylinder(5) and is provided with another threshold having a desired angle at both sides. The coupling component(9) has an engagement groove to joint with the front/rear heads. The breaker has further a spacer(11) interposed between the thresholds of the front/rear heads and the engagement groove of the coupling component.
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