US 4,045,643 AGranted

Bolt welding gun

AssigneeHilti Aktiengesellschaft

InventorsWalter Burkert, Walter Hopfer, Karl Grasmugg

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Abstract

In a bolt welding gun, a tubular bolt holder is positioned on the front end of the gun body and is threadedly connected to the tubular front part of a slide-in unit. The position of the bold holder is axially displaceable relative to the front part. A nut is threaded onto the bolt holder for fixing the position of the holder with relation to the front part. In addition, a base ring is mounted on the front end of the gun body and supporting legs for the gun extend outwardly from the ring. The base ring is coaxial with the nut and has a recess into which the nut fits for preventing its rotation. A releaseable lock within the gun body is engageable with the base ring and prevents its rotation and, as a result, the ring holds the nut against axial displacement for securing the position of the bolt holder relative to the tubular front part.

Claims11

Dependent claims

Bolt welding gun comprising a gun body having a front end from which bolts and the like are welded to a workpiece, a slide-in unit mounted within the front end of said gun body, said slide-in unit includes an axially extending front tubular part located within the front end of said gun body, a tubular bolt holder disposed in threaded engagement with and extending forwardly from said front tubular part and extending forwardly of the front end of said gun body, and supporting legs extending forwardly from the front end of said gun body, wherein the improvement comprises a locking element in operative association with said tubular bolt holder for fixing the relative threaded engagement between said bolt holder and said front tubular part, said locking element being a threaded nut in threaded engagement with said bolt holder, and a rotatable control element having a common axis of rotation with said threaded nut being arranged to laterally enclose at least a portion of the axial extent of said locking element for preventing the rotation thereof.

Dependencies are inferred from the claim text.