Patent ID: 7430949
Filing Date: 2008-10-07
Classification: B27B,Y10T

Abstract:
1. A circular saw, comprising: a work table; an angle adjustment device mounted on the work table and including: an outer tube rotatably mounted on a bottom of the work table; a drive block having a first end secured to a first end of the outer tube to rotate with the outer tube synchronously; an inner rod rotatably and movably mounted in the outer tube and the drive block and having a first end protruding outward from the drive block; a drive gear movably mounted on the inner rod and having a first end detachably urged on a second end of the drive block to rotate with the drive block by rotation of the outer tube; a fixed rod located under the work table and having a distal end formed with a threaded guide portion; a push barrel secured on the first end of the inner rod to rotate and move with the inner rod and having an inner wall formed with a threaded guide hole screwed onto the threaded guide portion of the fixed rod; a driving unit including a shaft rotatably mounted on the work table, a driven gear secured on a first end of the shaft to rotate the shaft and meshing with and rotated by the drive gear, and a transmitting gear secured on a second end of the shaft to rotate with the shaft; wherein the threaded guide hole of the push barrel is movable relative to the threaded guide portion of the fixed rod by rotation of the push barrel to move the push barrel to push a second end of the drive gear so as to push the drive gear to move toward the drive block.