Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lin Ruey Knifeware Ind Co LtdfiledCriticalLin Ruey Knifeware Ind Co Ltd
Priority to TW095101245ApriorityCriticalpatent/TW200726616A/en
Publication of TW200726616ApublicationCriticalpatent/TW200726616A/en
A bushing which is enlarged outwardly and narrowed inwardly by hydraulic is disposed on the outer circumference of the spindle in the wood working tool. The bushing includes a bushing body and a stop nut screwed on one end of the bushing body, wherein the bushing body comprises a cylindric inner sleeve and an outer sleeve, fitting on the outer circumference of the inner sleeve, on which a tool is arranged. Both ends of the inner and outer sleeves are sealed by welding, and a gap exist between the inner and outer sleeves. One end of the inner sleeve is provided with a protrusion protruding outwardly radially and having outer threads for the stop nut. The end, other than the protrusion, of the outer sleeve is provided with a flange projecting radially and having oil inlet and outlet communicating with the gap. By injection of oil into gap, the inner and outer sleeves are deformed and thus braced between the tool and spindle.