| 摘要 |
PROBLEM TO BE SOLVED: To improve cooling efficiency, to simplify a structure and to shorten the whole length of a tool. SOLUTION: A cooling fan 27 is provided on the outer periphery of an oil pulse unit 2 and an introduction port 30 and a discharge port 31 of air are formed on a unit case 4. This oil impact tool is provided with the oil pulse unit 2 on a central part of a cylindrical liner 17 filled and sealed with oil, the spindle 6 of which is arranged free to rotate inside of the unit case 4, connects the oil pulse unit 2 to a motor 1 to work, and works by rotating a spindle 6 in the oil pulse unit 2 by pulse accompanied by pressure change of oil repeatedly generated when the oil pulse unit 2 rotates. COPYRIGHT: (C)2009,JPO&INPIT
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