Electric power tool
A cover which covers outer peripheries of fastening screws are disposed on an outer periphery of a hammer case. A stopper which detachably positions and fixes the cover to the outer periphery of the hammer case is disposed.
1. An electric power tool comprising:
a motor serving as a driving source;
a reduction mechanism which transmits rotative power from said motor;
a percussion mechanism which converts the rotative power from said reduction mechanism into a percussive force;
a hammer case which houses said percussion mechanism, said hammer case being made of metal;
a housing which is adjacent to said hammer case, and which houses said motor, said hammer case being fastened on said housing by fastening screws;
a cover which entirely covers outer peripheries of each of said fastening screws and is disposed on an outer periphery of said hammer case; and
a fixing unit which detachably positions said cover to an outer periphery of said hammer case.
2. The electric power tool according to claim 1 , wherein said cover comprises at least one of an elastic resin and elastic rubber.
3. The electric power tool according to claim 1 , wherein protrusions which house respectively said fastening screws are disposed along a longitudinal direction of said cover, and
wherein said protrusions are tapered such that an inclination is formed between a front end portion and a raised rear portion of each of said protrusions.
4. The electric power tool according to claim 1 , wherein said fixing unit comprises a stopper which comprises one of an elastic resin and an elastic rubber,
wherein a fitting projection formed on said hammer case is engaged with a fitting recess formed inside said stopper.
5. The electric power tool according to claim 1 , wherein said cover comprises a material having a hardness lower than that of said hammer case.
6. An electric power tool comprising:
a percussion mechanism which converts rotative power into a percussive force;
a hammer case which houses said percussion mechanism;
a housing which is adjacent to said hammer case, said hammer case being fastened on said housing by fastening screws; and
a cover which entirely covers outer peripheries of each of said fastening screws and is disposed on an outer periphery of said hammer case, said cover comprising a plurality of protrusions disposed along a longitudinal direction of said cover,
wherein said protrusions house respectively said fastening screws and are tapered such that an inclination is formed between a front end portion and a raised rear portion of each of said protrusions.
7. The electric power tool according to claim 6 , wherein said hammer case comprises metal.
8. The electric power tool according to claim 6 , further comprising:
a motor serving as a driving source, said motor being housed in said hammer case; and
a reduction mechanism which transmits rotative power from said motor to said percussion mechanism.
9. The electric power tool according to claim 6 , further comprising a fixing unit which detachably positions said cover to said outer periphery of said hammer case.
10. The electric power tool according to claim 9 , wherein said fixing unit comprises a stopper,
wherein a fitting projection formed on said hammer case is engaged with a fitting recess formed inside said stopper.
11. The electric power tool according to claim 10 , wherein said stopper comprises at least one of an elastic resin and an elastic rubber.
12. The electric power tool according to claim 6 , wherein said cover comprises at least one of an elastic resin and an elastic rubber.