초록 ▼

A driving tool includes a hammer which hits instantaneously a connecting member for connecting the hammer with a spindle provided with a wrench at an end thereof. A housing has an on-off switch provided at a grip thereof and is divided into a part chamber in which parts are disposed and a motor cham

A driving tool includes a hammer which hits instantaneously a connecting member for connecting the hammer with a spindle provided with a wrench at an end thereof. A housing has an on-off switch provided at a grip thereof and is divided into a part chamber in which parts are disposed and a motor chamber in which a motor is disposed. An inertial wheel is installed rotatably in the part chamber and engaged with a shaft of the motor, and a spindle is installed rotatably between the part chamber and the inertial wheel and provided with a connecting member on an outer circumference thereof and a wrench on one end thereof. The hammer is pivotally installed at the inertial wheel to hit the connecting member by centrifugal force according to the rotation of the inertial wheel and returned an initial position by a return spring positioned between the inertial wheel and the hammer. A pair of balls contained in holes are formed at both sides of the inertial wheel and arc shaped grooves formed at the hammer, respectively. Each of springs presses the balls into the holes inwardly, and screws are threaded to the holes for adjusting the pressing force of the balls by the springs, respectively.

대표청구항 ▼

1. A driving tool for fastening fasteners, which comprising;a housing having an switch provided at a grip thereof and being divided into a part chamber in which parts are disposed and a motor chamber in which a motor is disposed; an inertial wheel being installed rotatably in the part chamber and en

1. A driving tool for fastening fasteners, which comprising;a housing having an switch provided at a grip thereof and being divided into a part chamber in which parts are disposed and a motor chamber in which a motor is disposed; an inertial wheel being installed rotatably in the part chamber and engaged with a shaft of the motor; a spindle being installed rotatably between the part chamber and the inertial wheel and provided with a connecting member on an outer circumference thereof and a wrench on an end thereof; a hammer being pivotally installed at the inertial wheel to hit the connecting member by centrifugal force according to the rotation of the inertial wheel and returned to an initial position by a return spring positioned between the inertial wheel and the hammer; and, means for accelerating instantaneously the pivoting motion of the hammer when the hammer is pivoted outwardly, the accelerating means includes a pair of balls contained in holes formed at both sides of the inertial wheel and arc shaped grooves formed at the hammer, respectively, springs for pressing the balls into the holes inwardly, respectively, and screws threaded to the holes for adjusting pressing force of the balls by the springs, respectively.