| 摘要 |
An electrical wrench 10 includes a housing 11, a power member 13, a reversing mechanism 15, a support transmission assembly 17, an opening gear 18, a main control assembly 19 and a restoring assembly 20. The housing includes two projections 1112 that can be shaped as claws, arranged oppositely to cooperatively define an entrance 1113. The opening gear includes an outer teeth portion, an opening and a driving portion in communication with the opening. The restoring assembly includes an identifying portion, a sensor (22 fig. 2) for sensing the position of the identifying portion, a control circuit board (23 fig. 2), a restoring switch (24 fig. 2) and a restoring switch operator (25 fig. 2). The restoring assembly can be used to detect the position of the opening so that a nut or bolt can be removed from the tool. The electric wrench can further comprise a tubular accessory 30 for engaging with a fastener through the opening gear, with an elastic member 184 placed between the opening gear and the accessory to connect the two. The electrical wrench can further comprise of a ratchet mechanism 154 to rotate the opening gear via the support transmission assembly. |
