Patent ID: 7082867
Filing Date: 2006-08-01
Classification: B23D,B23Q,Y10T

Abstract:
1. A circular saw comprising: a worktable having front and rear ends opposite to each other in a longitudinal direction; a blade supporting unit including a pivot end which is pivotally connected to said rear end of said worktable about a pivot axis in a transverse direction relative to the longitudinal direction, a free end which is turnable about the pivot axis to be close to and away from said front end of said worktable, and a middle mounting portion which is interposed between said pivot end and said free end, and which includes right and left support walls spaced apart from each other in the transverse direction; a motor having an output shaft for delivering a driving force; a saw blade shaft mounted on and rotatable relative to said left support wall about a blade axis parallel to the pivot axis, and having a driven end driven by said output shaft of said motor, and a coupling end which is disposed between said right and left support walls; a saw blade mounted on and rotated with said coupling end of said saw blade shaft; a driving shaft mounted on and rotatable relative to said left support wall about a driving axis parallel to the blade axis, and having a transmitting end which is driven by said output shaft of said motor, and a driving end which is opposite to said transmitting end along the driving axis and which extends laterally and outwardly of said right support wall; a dust collecting member disposed between said right and left support walls to confine a dust passageway for collecting wood dust, said passageway having an intake port which is disposed in the vicinity of said saw blade, and an outlet port which is disposed downstream of said intake port and which extends through said right support wall along the driving axis for passage of wood dust; a blower casing disposed laterally and outwardly of said right support wall, and defining an accommodation chamber which is disposed downstream of said outlet port and which receives said driving end of said driving shaft, said blower casing having a discharge port which extends in a direction radial to the driving axis to be communicated with said accommodation chamber; and an impeller disposed in said accommodation chamber, and mounted on said driving end of said driving shaft to rotate about the driving axis so as to draw wood dust from said dust passageway into said accommodation chamber and out through said discharge port.