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An electromechanical flywheel containing fastener driving tool. The tool comprises a frame supporting a housing, a guide body and a fastener containing magazine. A free floating driver within said frame. Forward and rearward flywheels are arranged in tandem within the tool frame with their periphera

An electromechanical flywheel containing fastener driving tool. The tool comprises a frame supporting a housing, a guide body and a fastener containing magazine. A free floating driver within said frame. Forward and rearward flywheels are arranged in tandem within the tool frame with their peripheral surfaces opposed. A pair of beam-like arcuate load springs are located to either side of the frame. The load spring rearward ends carry bearings in which the shaft of the rearward flywheel is journaled. The load spring forward ends carry rotatable eccentric bearing housings in which the shaft of the forward flywheel is journaled. The bearing housings are rotatable to shift the forward flywheel between operative and inoperative positions wherein the opposed surfaces of the flywheels are spaced by a distance less than and a distance greater than the thickness of the driver, respectively. The load springs permit the forward flywheel to yield slightly from its operative position when the driver is introduced between the flywheels. An electric motor and gear train drive the flywheels in counterrotation regardless of the position of the forward flywheel. A driver return system comprises a stationary idler roller and a return roller and gear train constantly driven by the rearward flywheel and pivotable thereabout between operative and inoperative positions. The driver is shiftable between a retracted position and an extended position. A driver trigger released locking means maintains the driver in its normal position. A driver actuator introduces the released driver between the flywheels. The tool has a safety which controls the driver trigger, the driver actuator and the positions of the forward flywheel and the return roller.

대표청구항 ▼

An electromechanical fastener driving tool comprising a frame, a tool housing, a guide body and a magazine supported on said frame, a driver located within said frame and shiftable between a normal retracted position and an extended fastener driving position, a first rearward flywheel and a second f

An electromechanical fastener driving tool comprising a frame, a tool housing, a guide body and a magazine supported on said frame, a driver located within said frame and shiftable between a normal retracted position and an extended fastener driving position, a first rearward flywheel and a second forward flywheel being located within said frame and having peripheral surfaces, portions of which face each other, said first and second flywheels each having its own shaft, a pair of plate-like load springs in parallel spaced relationship being located exteriorly of said frame, said load springs having first ends, bearings mounted in said first ends of said load springs and being rotatively mounted in coaxial holes in said frame, said first flywheel being located between said load spring with its shaft being rotatively mounted in said load spring bearings, said load springs having second ends, and a pair of eccentric bearing housings each being mounted in a hole in said second end of each of said load springs, each bearing housing being partially received within notches in said frame, said second flywheel being located between said load springs with its shaft rotatively mounted in said load spring eccentric bearing housings, a bracket joining said bearing housings together, said bearing housings being simultaneously rotatable in their respective load spring holes to shift said second flywheel between an inoperative position wherein its peripheral surface is separated from said peripheral surface of said first flywheel by a distance greater than the thickness of said driver, and an operative position wherein said peripheral surface of said second flywheel is spaced from said peripheral surface of said first flywheel by a distance slightly less than the thickness of said driver, means to cause counter rotation of said flywheels irrespective of the position of said second flywheel, means to rotate said bearing housings and shift said second flywheel to its operative position, means to introduce said driver into engagement between said flywheels when said second flywheel is in its operative position to shift said driver through a work stroke, said load springs permitting said second flywheel to yield slightly to accommodate said driver, means to rotate said bearing housings to shift said second flywheel to its inoperative position at the end of said driven work stroke, and means to return said driver to its normal retracted position.