| 摘要 |
<p>A power tool, particularly a hammer drill, comprising; a body (4); a drive mechanism located within the body; at least one handle (10) moveably mounted on the body (4) by at least one connection point (18, 32; 16, 34); a vibration dampening mechanism connected between the body (4) and the handle (10) which reduces the amount of vibration, generated by the operation of the drive mechanism, being transferred from the body (4) to the handle (10); wherein the vibration dampening mechanism comprises a dampener (56); characterised in that the vibration dampening mechanism further comprises a restraining mechanism (52; 54) which restricts the direction of the movement of the handle (10) at the connection point (18, 32; 16, 34) where it mounts to the body to substantially the direction of the dominant vibration experienced by that connection point (18, 32; 16, 34). The restraining mechanism can comprise a pivotal lever or slide. The handle can be connected at two connection points, the movement of each one being restricted to that of the dominant vibration experienced at each connection.</p> |
