| 摘要 |
A hammer drill having an outer housing defining a handle is disclosed. The tool includes transmission housing including a drive mechanism and a motor, wherein the transmission housing is moveably mounted in the outer housing by means of arms for movement relative to the outer housing along a non-linear path between a first position, corresponding to no force being applied by a user to the outer housing of the tool, and a second position, corresponding to the user applying a force to the outer housing when the working member of the tool engages a workpiece. Springs bias the transmission housing towards the first position. The direction of travel of the drive mechanism relative to the outer housing at a particular point on the non-linear path is arranged to coincide with the direction of the dominant vibration occurring in the drive mechanism relative to the outer housing when a particular force is applied to the outer housing to move the drive mechanism relative to the outer housing to that point on the non-linear path against the biasing force of the biasing means.
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