Device for setting a self-drilling clamping fastener
AssigneeSFS Industrie Holding AG
InventorDaniel Gasser
Life of this patent
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Abstract
A device for setting a self-drilling clamping fastener has a fixed external housing, a sleeve-shaped mounting member in which clamping jaws for gripping the shaft of the fastener are retained, a drive sleeve coupled to a rotary drive and a guide sleeve. The guide sleeve and the drive sleeve both are rotatably positioned in the housing. The guide sleeve can be prevented from turning by detent elements movably positioned in the housing. The drive sleeve and the guide sleeve are coupled to each other so that a force during the drilling process is transferred from the drive sleeve to the guide sleeve. The guide sleeve can be rotated together with the mounting member inside the housing in one direction only in a free-wheel fashion.
Claims12
A device for setting a self-drilling clamping fastener (10), the device comprising an external housing (5);
- clamping jaws (2);
- a sleeve-shaped mounting member (1), said clamping jaws gripping a tension mandrel (9) of the clamping fastener and being retained in said sleeve-shaped mounting member (1);
- a rotary drive (25) having a motor drive (24);
- a drive sleeve (4) which is coupled to and being driven by the rotary drive in operation, said drive sleeve (4) having a threaded bore (20), said mounting member (1) having at an end thereof remote from said clamping jaws an external thread (18) engaged in said threaded bore;
- a guide sleeve (3);
- means for locking said mounting member (1) against rotation, said mounting member being axially displaceable in said guide sleeve (3) but retained secured against rotation in respect thereto, said guide sleeve (3) and said drive sleeve being coupled to each other by one of a force-fitting coupling and a form-fitting coupling in a driving direction of rotation, said guide sleeve (3) and said drive sleeve (4) being rotatably mounted in said external housing (5), said external housing (5) being fixedly connected to a housing of said rotary drive;
- and detent members (40) displaceably positioned in said external housing (5) for locking said guide sleeve (3) against rotation for a fastener setting process which follows a drilling process, wherein said guide sleeve (3) together with said mounting member (1) are rotatably positioned in said external housing (5) in a fashion of a freewheel and in one direction only.
Dependencies are inferred from the claim text.