Back to results
US 4,906,147 AGranted
Clamping mechanism
AssigneeLedermann GmbH & Co. KG
InventorsJulius Friesinger, Otto Katz
Life of this patent
Estimating the term…
Abstract
Various clamping mechanisms are known for clamping shank-like tools such as drills, milling cutters and the like. The known clamping mechanisms often require long setting times involving long idle times when changing tools, particularly on machines with several spindles. The instant disclosure teaches a clamping mechanism allowing rapid tool change on the machine spindles and having good concentricity characteristics. A bayonet catch-like locking device is used for this purpose.
Claims8
A clamping mechanism for machine tools comprising:
- a first coupling part, said first coupling part having a conical axial bore and at least two radial holes penetrating said conical axial bore;
- a locking element positioned within said conical axial bore, said locking element having a retaining bolt located axially within said conical axial bore and a radially extending cross pin which extends into said at least two radial holes for fixing said locking element for limited axial movement within said conical axial bore;
- resilient biasing means engaging said locking element for biasing said locking element in a first direction within said conical axial bore;
- and
- a second coupling part insertable within said conical axial bore, said second coupling part having engagement means for selectively engaging said radially extending cross pin for holding said second coupling part in place within said conical axial bore under the force of said resilient biasing means.
2 more elements
Dependencies are inferred from the claim text.