Patent ID: 7047843

Claim:
A tool coupling device comprising: a seat body having a chucking flange at one end and a polygonal column at the other end for fitting with a wrench, the seat body being formed with an axial receiving space including a first receiving room and a ratchet section sequentially arranged from the chucking flange to the polygonal column; a ratchet locating mechanism received in the receiving space of the seat body, the ratchet locating mechanism having a controlling disc and a working stem projecting from the controlling disc, a second stopper block and a pair of radially symmetric controlling keys being connected with the working stem, a third resilient member being fitted on one end of the working stem near the controlling disc; and a transmission member, one end of the transmission member being defined as a coupling section for fitting into the receiving space of the seat body, the other end of the transmission member being a connecting section, the coupling section being formed with a left receiving room and a right receiving room in parallel to a diameter of the coupling section, a first chucking pin and a fourth resilient member being inlaid in the left receiving room, a second chucking pin and a fifth resilient member being inlaid in the right receiving room, the controlling keys of the working stem being respectively engaged with the first and second chucking pins, the transmission member being formed with an axial second receiving tunnel having a large diameter section adjacent to the coupling section, the third resilient member being received in the large diameter section, a shoulder section being formed between the large diameter section and the second receiving tunnel for controlling the third resilient member, an end face of the coupling section being formed with several locating holes arranged at equal intervals.