| 摘要 |
<p>A grinder (1) includes a lock mechanism inhibiting detachment and rotation of a cylindrical portion (15) of a wheel cover (13) and attached to a bearing box (4). The lock mechanism includes a lock member (22) and a torsion spring (25) urging the lock member (22) to the locked position. The lock member (22) is ring-shaped, with a larger diameter than the cylindrical portion (15), surrounds the bearing box (4) and has a protruding engagement hook (36) provided in a front side inner edge. The lock member (22) can be slid between a front-side lock released position at which the engagement hook (36) is separated away from the bearing box (4) and the cylindrical portion (15) can be attached to/detached from the bearing box (4), and a rear-side locked position at which the engagement hook (36) passes through the cylindrical portion (15) that surrounds the bearing box (4) and engages with an outer periphery of the bearing box (4) such that a front portion is contained within a gear housing (3).</p> |
