| 摘要 |
A power operated self-drilling rivet setting device wherein an operator held housing contains a motor (27) driving a principal pinion (24); this principal pinion (24) is connected through gear wheel (25) to the cam (16) driving a rivet setting mechanism, the latter as is well known in the Art. The above mechanism is contained within an independently rotatable cylinder (44) which directly rotates the rivet setting means. With the power ON, torque is initially directed to the rivet setting mechanism through gear wheel (25) to tighten the jaws (5) onto the mandrel shank (40), until the minimum torque required to collapse a rivet (39) is more than that required to drill a workpiece, then the gear wheel (25) will stop rotating to become a moon wheel to the drive-pinion (24). Subsequently, the rotary cylinder (44) will rotate and drive the self-drilling rivet. Drilling the workpiece takes place until the rivet is seated. More pressure on the trigger-switch (32) will brake the rotary cylinder (44) transferring torque back through the gear wheel (25) to set a rivet, after which the cam (16) with continued brake pressure from the trigger-switch (32) will return the mechanism through 360 degree of arc to disgorge the spent mandrel and be ready to receive another.
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