| 摘要 |
PROBLEM TO BE SOLVED: To provide an effective cooling technique for further improving a cooling effect of a power tool. SOLUTION: This power tool is provided with a driving motor 201, a working tool 313 for performing a prescribed machining work for a workpiece, a power transmitting part 301 for transmitting an output of the driving motor 201 to the working tool 313, a tool main body 103 for storing the driving motor 201 and the power transmitting part 301 and a cooling fan 217 arranged in the tool main body 103. The tool main body 103 is provided with a first cooling air circulating passage 299 for circulating cooling air into the tool main body 103 via the cooling fan 217 and second cooling air circulating passages 231 and 233 for taking in outside air by a flow of cooling air of the first cooling air circulating passage 299 and mixing the outside air with the cooling air. COPYRIGHT: (C)2005,JPO&NCIPI
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