ELECTRICALLY-DRIVEN RIVET NUT TOOL HAVING MULTI-STAGE AND ADJUSTABLE STROKE AND PULL-RIVETING FORCE

摘要

The present invention provides an electrically-driven rivet nut tool having a multi-stage and adjustable stroke and pull-riveting force. The electrically-driven rivet nut tool has a selection button (9) for selecting a stroke value and a pull-riveting force from multiple stages. A control processor (5) receives the selected stroke value and pull-riveting force. An extension plate is mounted in a housing of the tool. A count sensor (4) is provided on the extension plate. The count sensor is positioned correspondingly to sensing blocks (3) on a primary large gear (2) and is connected to the control processor. The count sensor transmits the number of signals indicative of the rotation of the sensing blocks to the control processor in real time, and the control processor compares the number of signals with a preset count value and controls a motor to rotate backward to return a pull screw to the original position if the number of signals exceeds the preset count value. The control processor (5) measures the current value for pull-riveting in real time, and controls the motor to rotate backward to return the pull screw to the original position if the current value exceeds a preset current value. The present invention has the advantages that the stroke and the pull-riveting force can be adjusted according to actual needs, so that the efficiency is improved, the power energy is saved, and the service life is prolonged.