BLIND RIVET FASTENING DEVICE

摘要

A blind rivet fastening device in which a passage for collecting broken mandrels is provided other than on the axis of the motor. A large collection chamber is provided for broken mandrels. A collection chamber for broken mandrels is provided in front of a brushless electric motor in the axial direction. When the electric motor rotates, power from the electric motor is transmitted to a spindle positioned to the rear of the collection chamber via a second shaft positioned below the collection chamber. When the spindle rotates, a pulling head moves in the axial direction. The axial position of the pulling head is determined by detecting the rotation count of the electric motor. Forward rotation, reverse rotation, and stopping of the electric motor are controlled based on the operation of a trigger and the axial position of the pulling head. Excessive torque is avoided by clutches.

主权项

1. A blind rivet fastening device for deforming a sleeve of a rivet body so as to expand diametrically by drawing, in the axial direction, a mandrel of a blind rivet including a mandrel and a rivet body, thereby fastening the rivet body to a mounted member via the expanded sleeve portion and a flange of the rivet body, and breaking the mandrel, the blind rivet fastening device characterized in comprising:
an electric motor provided on one end; a power transmitting means for transmitting the rotation of the electric motor; a spindle provided in front of the electric motor and rotated by the power transmitted by the power transmitting means; a ball screw nut adjacent to the spindle, and connected to and rotated by the spindle; a ball screw shaft provided in the central portion of the ball screw nut in the axial direction, and moved in the axial direction by the rotation of the ball screw nut; a drawing means connected to the ball screw shaft for gripping and drawing a shaft portion of the mandrel; a rotation count detecting element for detecting the rotation count of the electric motor; a trigger provided in a handle portion; and a control means for controlling the forward rotation, reverse rotation, and stopping of the electric motor based on operation of the trigger and the rotation count of the electric motor.