A quick-change connecting rod assembly comprising:
- a connecting rod including an outer periphery, with the connecting rod including a front end having a coupling hole, with the connecting rod further including a rear end having a shank, with the coupling hole of the connecting rod including a front portion and a rear portion, with the front portion of the coupling hole including a polygonal inner periphery having a plurality of inner wall faces and a plurality of corners, with two coupling grooves defined in the polygonal inner periphery of the coupling hole and diametrically opposed to each other, with each of the two coupling grooves including two sidewalls and a bottom wall between the two sidewalls, with the front end of the connecting rod including a first radial hole intercommunicated with one of the two coupling grooves, with the connecting rod further including a second radial hole located behind the first radial hole and intercommunicated with the rear portion of the coupling hole, with first and second positioning balls respectively received in the first and second radial holes, and with a first abutment ring mounted around the connecting rod and located between the first and second radial holes;
- a pressing device including a pressing seat, a magnet, and a first spring, with the pressing seat received in the rear portion of the coupling hole, with the pressing seat including a front end having a receptacle, with the front end of the pressing seat further including a recessed portion formed on an outer periphery thereof delimiting the receptacle and extending rearwards, with the pressing seat further including a pressing portion behind the recessed portion and configured for pressing against the second positioning ball, with the magnet mounted in the receptacle of the pressing seat, and with the first spring providing elasticity for moving the pressing seat;
- and
- a sleeve device including a sleeve, a rear abutment ring, and a second spring, with the sleeve including a receiving hole in a central portion thereof, with the front end of the connecting rod received in the receiving hole of the sleeve, with the receiving hole including a front portion having an inner periphery with an inclined face configured for pressing against the first positioning ball, with the rear abutment ring fixed in a rear portion of the receiving hole, with the rear abutment ring including a front side having a front stop wall, with the rear abutment ring further including an inner periphery having a side stop wall configured for pressing against the second positioning ball, with the inner periphery of the rear abutment ring further including a recess configured for receiving a portion of the second positioning ball, and with the second spring providing elasticity for moving the sleeve.