| 摘要 |
A replaceable steel chisel structure includes a steel chisel, a sleeve, a cam ring, and a spring. The steel chisel is disposed with circular grooves. The sleeve is hollow to receive the steel chisel and disposed with channels to accommodate steel balls. The steel balls correspond in position to the circular grooves of the steel chisel. The cam ring is hollow to receive the sleeve and contains an eccentric chamber. The eccentric chamber is an increasingly larger arc space defined between the cam ring and the sleeve for the cam ring to hold against the steel balls and have the steel balls to be inserted into and hold against the circular grooves again.
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