Impact tool

摘要

In a pneumatic impact wrench there is an output shaft that is connectable in a removable manner to a screw coupling member; a torque sensor, which is mounted on the shaft, sends signals to a control unit that calculates the energy transferred through the output shaft and controls the wrench on the basis of a comparison between the calculated energy and a predefined threshold value.

主权项

1. An impact tool comprising:
a housing; a rotating hammer arranged in said housing and rotatable by a motor; a rotating anvil arranged in said housing and rotatable by said hammer by a series of impacts; a shaft rotating around a rotation axis, said shaft having a proximal end fixed to said anvil and a distal end that protrudes from said housing, said distal end terminating in a fitting element for removable connection with an external device; at least one magnetic torque sensor for detecting a torque of said shaft, said at least one torque sensor comprising at least one coil wound around a portion of said distal end, said portion being adjacent to said fitting element, said at least one torque sensor comprising at least one further coil wound around said portion of said distal end, said at least one coil operating as a magnetic field generator and said further coil operating as a magnetic field sensor.