IMPACT TIGHTENING TOOL WITH ANGLE DETECTION

摘要

PROBLEM TO BE SOLVED: To provide an impact tightening tool with an angle detection, including a structure that is superior in strength and achieves miniaturization.SOLUTION: An impact tightening tool is provided for converting rotational force of a rotary driving source into intermittent impact by an impact generating unit P to tighten a screw member by the rotational force of a main shaft S provided by the impact force. The impact tightening tool with an angle detection includes a torque detection means 10 for detecting a tightening torque, and an angle detection means 20 rotating integrally with the main shaft S and detecting a rotation angle. The angle detection means 20 is a magnetic encoder including a magnetic rotation drum 21 with multipole magnetization provided in the peripheral surface and having magnetic poles of N pole and S pole disposed alternately, and a magnetic sensor 23 disposed opposite the peripheral surface of the magnetic rotation drum 21 and comprising a thin film magnetoresistive element for detecting the change of the magnetic field of the magnetic rotation drum. The angle detection means is housed in a conical tapering case tip end part C of the impact tightening tool.