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US 5,775,857 AGranted
Tool-holder
AssigneeJohne & Co. Prazisionswerkeuge GmbH
InventorFrank Johne
Life of this patent
Estimating the term…
Abstract
A tool holder in which a part to be clamped, for instance in a machine spindle, has an elastic portion on its outer side.
Claims27
A tool holder for holding a tool in a receiver of a machine part, comprising:
- a front part;
- an extension member that is insertable into the receiver, the extension member having an external shape essentially adapted to a shape of the receiver;
- and a flange located between the front part and the extension, the flange having a rear surface facing the extension member that is restable flat against an end surface of the machine part, the extension member being configured as a sleeve body that has a front portion adjacent to the flange, an elastically deformable portion adjacent the front portion, and a rear portion adjacent to the deformable portion, the deformable portion being oversized relative to the receiver, the rear portion of the sleeve body being configured to be engagable by a clamping device.
A tool holder for holding a tool in a receiver of a machine part, comprising:
- a front part;
- an extension member that is insertable into the receiver, the extension member having an external shape essentially adapted to a shape of the receiver;
- a flange located between the front part and the extension, the flange having a rear surface facing the extension member that is restable flat against an end surface of the machine part, the extension member being configured as a sleeve body that has a front portion adjacent to the flange, an elastic portion adjacent the front portion, and a rear portion adjacent to the elastic portion;
- a shank connected to the front part so as to extend into the sleeve body;
- a clamping bolt arranged concentrically and longitudinally moveable in the shank;
- and means provided between the clamping bolt and an inner circumferential surface of the sleeve body for exerting a clamping force on the elastic portion of the sleeve body, the force exerting means including an abutment arranged on the clamping bolt and a clamping element arranged on the clamping bolt so as to engage the abutment and so as to stretch the elastic portion by radial movement of an outer circumference of the clamping element.
3 more elements
A tool holder according to claim 19, and further comprising spring means for acting on the abutment in an unclamping direction of the clamping elements.
Dependencies are inferred from the claim text.