| 摘要 |
A torque application system intended for tightening a threaded fastener (12) having a rear end surface with an integral ultra-sonic sound wave generating and sensing device (21), which comprises a power wrench (10) with an output shaft (17) provided with a pin-shaped contact device (20) for delivering and receiving electric signals, and a set of torque transferring nut sockets (11a, 11b) each having a forward socket portion (22) for connection to the fastener head, a rear socket portion (23) for connection to the power wrench output shaft (17), and a central portion (24, 26) separating the forward and rear portions (22, 23), wherein each one of the torque transferring nut sockets (11a, 11b) carries a probe unit (28) with a rear extremity (29) extending into the rear socket portion of the nut socket (11), and a forward extremity (30) extending into the forward socket portion (22) of the nut socket (11a, 11b), wherein the forward extremity (30) is telescopically extendible by spring force for establishing contact with the sound wave generating and sensing device (21) on the rear end surface of the fastener head when interconnecting the output shaft (17) with the fastener (12a, 12b) by means of anyone of the set of nut sockets (11a, 11b).
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