| 摘要 |
A quick coupler for a construction machine according to the present invention comprises: a main body provided with hook parts respectively protruding from a left side wall and a right side wall in order to support a coupling-clamp pin; a hydraulic cylinder including a large chamber and a small chamber, a wedge fixing member fixed to the inlet of the large chamber and a rod for performing an extension operation and a retraction operation by oil pressure and moving in the opposite direction from the wedge fixing member during the extension operation; a first wedge fixed to the outside end portion of the wedge fixing member and coupled to or released from the coupling-clamp pin by the movement of the hydraulic cylinder; a second wedge provided with a guide protruding from a body part and fixed to the outside end portion of the rod so as to be coupled to or released from the coupling-clamp pin by moving in the opposite direction from the first wedge; and a stopper provided between the hydraulic cylinder and the second wedge and setting a coupling-releasing position in the main body so as to restrain the movement of the hydraulic cylinder and the second wedge. |
