Combined overload clutch and chuck

Abstract

Abstract A CHUCK, ESPECIALLY FOR MOUNTING ROTATABLE TOOL IN A WORKING MACHINE, IS DEVISED AS AN OVERLOAD CLUTCH, WHICH MEANS THAT A FIRST MEMBER (THE TOOL SHAFT), IS PROVIDED WITH AT LEAST TWO PERIPHERAL GROOVES LOCATED ECCENTRICALLY IN RELATION TO THE AXIS OF ROTATION. THE OTHER TUBULAR MEMBER (THE CHUCK PART OF THE MACHINE) IS OPPOSITE TO EACH GROOVE IN A FIRST MEMBER MOUNTED THEREIN PROVIDED WITH A RADIALLY DIRECTED RECESS IN WHICH A ROLLING BODY, E.G. A STEEL BALL IS FITTED. THIS BODY COOPERATES WITH A BEVELLED SURFACE IN THE TUBULAR MEMBER AND IS SUBJECTED TO AN ELASTIC PRESSURE BY A SPRING. WHEN THE TORQUE BECOMES TOO GREAT, SO THAT THE FIRST MEMBER TENDS TO TURN IN RELATION TO THE ENCLOSING TUBULAR MEMBER, THE BALLS WILL BE FORCED RADIALLY OUTWARDS ALONG THE BEVELLED SURFACE. THE CLUTCH MAY BE DERIVED IN SUCH A MANNER THAT THE TOOL SHAFT IS EJECTED FROM THE CLUTCH WHEN THIS OCCURS AND/OR FURTHER IN SUCH A MANNER THAT THE BEVELLED SURFACE CAN BE ADJUSTED WHEN THE TOOL SHAFT IS MOUNTED OR DISMOUNTED TO MINIMIZE THE RESISTANCE OFFERED BY THE BALLS.

Inventors

• 👤 Ture A Johansson
• 👤 Tor Allan Wikholm

Bibliographic Details