Vibration reduction apparatus for power tool and power tool incorporating such apparatus

摘要

A power hammer having a handle 302 mounted to a housing 312 of the power tool and capable of limited movement relative thereto is described. Hollow axle 316, which is attached to the housing 312, is able to rotate relative to the housing 312 between a first and second position and is biased towards the first position by a torsional spring 344 which extends within axel 316. Arms 326a and 326b which are fixed relative to axle 316 such that rotation of the axle causes rotation of the arms. Connectors 330a and 330b are slidably mounted within guides 332a and 332b and are respectively connected at one end to arms 326a and 326b and at the other end to the handle 302. In use, vibrations in the body of the power tool cause movement of one end of handle 302 which causes movement of connector 330a and in turn of arm 326a. Movement of arm 326a causes rotation of axle 316 which therefore causes movement of the other arm 326b. This in turn causes connector 330b to slide within guide means 332b and move the other end of handle 302. Thus the movement of one end of the handle 302 is matched to the other end.