| 摘要 |
PROBLEM TO BE SOLVED: To suppress displacement or inclination of a crank shaft.SOLUTION: An impact tool 1 for applying impact force to a tip tool 2 by pressure fluctuation in a cylinder 40 following to reciprocating motion of a piston 43 comprises: a conversion mechanism for converting rotary motion of an output shaft 51a of a motor 51 into reciprocating motion of the piston 43; first and second housing members 11 and 12 for forming a storage space in which the conversion mechanism is stored; a needle bearing 57 disposed on inside of the first housing member 11 and supporting the crank shaft 53 constituting the conversion mechanism rotatably; a ball bearing 59 disposed on inside of the second housing member 12 and supporting the crank shaft 53 rotatably; and a reinforcement member 60 disposed over the first and second housing members 11 and 12 on their outside. |
