| 摘要 |
<p>In a hammer drill, a coil spring 43 is disposed rearward of a piston cylinder 23 inside a housing 2 so as to press the piston cylinder 23 to an advanced position when the hammer drill operates in a drill mode, and a supporting plate 36 is disposed at a rear end of the piston cylinder 23. The supporting plate 36 includes a pair of side plates 40 and a base portion connecting front ends of the side plates 40. The base portion is in contact with a rear surface of the piston cylinder 23, and rear ends of the side plates 40 are in contact with a front end of the coil spring 43. Openings provided in the side plates 40 are configured to hold a pin 37 on which a connecting arm 34 is pivoted.</p> |
