Patent ID: 9381625
Filing Date: 2016-07-05
CPC Classification: B25B

Claim Text:
1. An electrical wrench for rotating a fastener, the electrical wrench comprising: a housing having a handling portion and a mounting portion extending from one end of the handling portion along a length direction, the mounting portion comprising two projections arranged oppositely and the two projections cooperatively defining an entrance therebetween; a drive assembly comprising a power member, a reversing mechanism, a support transmission assembly, and an opening gear wherein the power member, the reversing mechanism, the support transmission assembly and the opening gear are cooperatively coupled to one another and accommodated in the housing with the opening gear being rotatably arranged in the mounting portion and including an outer teeth portion for engaging with the support transmission assembly, an opening corresponding to the entrance and a driving portion in communication with the opening, wherein a width of the entrance and the opening is greater than or equal to a diameter or width of a tubular or cylinder member that is cooperative with the fastener, and wherein the driving portion is operable to rotate the fastener or an accessory for holding the fastener when positioned within the opening gear; a main control assembly in communication with the drive assembly; and a restoring assembly wherein the restoring assembly comprises an identifying portion which is arranged in a predetermined position on the opening gear or a predetermined position on the reversing mechanism for use in identifying a position of the opening of the opening gear, a sensor for sensing the position of the identifying portion, a control circuit board connected with the sensor, a restoring switch and a restoring switch operator such that, when the restoring switch is triggered via use of the restoring switch operator, the sensor is used to sense a presence of the identifying member and to generate an electrical signal which is transmitted to the control circuit board so that the control circuit board controls the drive assembly to rotate the opening gear into a predetermined position; and wherein the main control assembly comprises a main switch, a main switch operator, and a switch driving member, wherein the control circuit board is provided with a control circuit for controlling the power member, and wherein the switch driving member is adapted to switch on/off the control circuit under the driving action of the main switch operator and the restoring switch operator.