Patent ID: 8443512
Filing Date: 2013-05-21
Classification: B21J,Y10T

Abstract:
1. An electric blind rivet setting device comprising a hollow nose that accepts a mandrel of a blind rivet comprising a mandrel and rivet body, a tool housing disposed in the axial direction behind said nose, jaws that are disposed inside said nose for gripping the mandrel, a pulling head that is inside said nose for pulling said jaws backward in the axial direction from a home position and returns said jaws to said home position, an electric motor that forms a drive power source for moving said pulling head in the axial direction and a drive force transfer gear train to pull said pulling head from said home position backward in the axial direction and return said pulling head forward in the axial direction to said home position from a back position by the rotation of said electric motor; said housing including a handle and a trigger switch for operating said electric motor to set the rivet when the rivet body is expanded by the mandrel of a blind rivet gripped in said jaws being pulled backward in the axial direction from said home position by said pulling head, said housing including a recovery container for receiving a part of the broken mandrel shaft from said pulling head when said rivet body is set in members being riveted, said container being located in said housing between said motor and said pulling head on a front side of said electric motor in the axial direction, said electric motor being at the back end of said tool housing and disposed on a rear side in the axial direction of said recovery container, said drive force transfer gear train being provided in a part of said tool housing below said recovery container, circumventing said recovery container, said drive force transfer gear train being connected to said electric motor on the rear side of said recovery container so that said drive force transfer gear train rotates with said electric motor, said gear train including a drive shaft that extends forward in the axial direction from a back end and is mounted for rotation about its own axis, and a spindle that is connected to an end part of said drive shaft at the front side of said recovery container so that said spindle is rotated by the rotation of said drive shaft, said spindle being connected to said pulling head so that said pulling head is moved backward in the axial direction or forward in the axial direction by the rotation of said spindle and a control circuit including said trigger switch and two position sensors for controlling said electric motor forward rotation, stopping of rotation and reverse rotation by detecting pulling operations of said trigger and the position of said pulling head in the axial direction due to the rotation of said drive shaft.