초록 ▼

A ceramic and masonry power saw is constructed with a fluid cooling bearing assembly to drive a saw blade. The fluid cooling bearing assembly includes a bearing housing which has a coolant chamber embracing around the shaft sleeve. The coolant chamber has a C-shaped cross section and is extended alo

A ceramic and masonry power saw is constructed with a fluid cooling bearing assembly to drive a saw blade. The fluid cooling bearing assembly includes a bearing housing which has a coolant chamber embracing around the shaft sleeve. The coolant chamber has a C-shaped cross section and is extended along the shaft sleeve. The bearing housing also provides a coolant inlet and a coolant outlet for sealedly connecting the coolant chamber with the coolant conduit arrangement. Therefore, the coolant would not only be pumped to cool the saw blade and the work piece to be cut, but also be pumped to flow inside the bearing housing for cooling the rotating blade shaft in order to prevent overheating of the blade shaft.

대표청구항 ▼

[ What is claimed is:] [1.] A power saw, comprisinga supporting frame;a cutting table mounted on said floor supporting frame;a cutting head arrangement supported above said cutting table, which includes a head platform pivotally mounted on said supporting frame, a motor mounted on said power saw, a

[ What is claimed is:] [1.] A power saw, comprisinga supporting frame;a cutting table mounted on said floor supporting frame;a cutting head arrangement supported above said cutting table, which includes a head platform pivotally mounted on said supporting frame, a motor mounted on said power saw, a fluid cooling bearing assembly which is firmly secured to said head platform for rotatably mounting a circular saw blade, and a transmission means for transmitting a rotating power of said motor to said fluid cooling bearing assembly, wherein said fluid cooling bearing assembly comprises a hollow cylindrical bearing housing which has an axial shaft sleeve and two enlarged bearings cavities provided at two ends of said shaft sleeve to receive two roller bearings therein respectively, and a blade shaft which has a length longer than said bearing housing extending along said shaft sleeve of said bearing housing coaxially and being rotatably supported by said two roller bearings, and that said saw blade is rotatably mounted on said blade shaft and driven by said transmission means to rotate; anda fluid pump for pumping a fluid coolant in a coolant reservoir via a coolant conduit arrangement to said saw blade to supply a stream of coolant to said saw blade for cooling down heat generated during cutting and flushing away saw dust, wherein said bearing housing further has a coolant chamber therein embracing around said shaft sleeve, said bearing housing also providing a coolant inlet and a coolant outlet to sealedly connect said coolant chamber with said coolant conduit arrangement, so that said coolant is not only pumped to cool said saw blade, but also be pumped to flow inside said coolant chamber for cooling said bearing housing in order to prevent overheating of said roller bearings.