| 摘要 |
A universal power tool has at least two interchangeable first housing units, at least two interchangeable second housing units, one of the at least two first housing units having a first axis and a cam mechanism to be turned by an outside power source, the other of the at least two first housing units having a cylinder-piston arrangement with a piston rod movable by fluid power, each of the at least two second housing units having a second axis perpendicular to the first axis, a lever, ratchet mechanism, different engaging structures for engaging a threaded connector to be tightened or loosened, and also having a third axis perpendicular to the first axis and to the second axis, and a structure for interchangeably connecting one of the at least two second housing units to one of the at least two first housing units, so that upon rotating the cam of the one of the at least two first housing units in one direction the cam mechanism imparts a movement along the first axis, and upon moving a piston of the other of the at least two first housing units a piston rod imparts a movement along the first axis, each of the movements along the first axis being applied to the lever-ratchet mechanism to make one end of a lever to move along the first axis and another end of the lever to turn around the third axis, and thereby when the cam is turned by an outside tool or the piston rod is moved along the first axis by fluid power, the lever-ratchet mechanism is moved forward and backward to ratchet the fastener in a single turning direction.
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