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US 9,802,256 B2Granted
Screw-in tool and tool holder for such a screw-in tool
AssigneeFranz Haimer Maschinenbau KG
InventorFranz Haimer
Life of this patent
Estimating the term…
Abstract
A screw-in tool and a tool holder for such a screw-in tool. The screw-in tool contains a tool head and a tool shank having an outer thread and a supporting region arranged between the tool head and the outer thread. The supporting region is formed by two conical bearing faces having different cone angles.
Claims17
A rotary tool for coupling with a rotatable threaded holder, the tool comprising:
- a tool head with a work surface and a conical first bearing surface formed in the tool head and defining a first cone angle;
- and
- a tool shank having a peripheral surface defining an outer periphery of the shank, the shank including an external thread integrally formed upon the peripheral surface and threadably engageable with the holder, the tool shank and the thread thereby formed as one piece, the tool shank further having a conical second bearing surface formed in the shank and defining a second cone angle, the second bearing surface positioned along the peripheral surface;
- the first and second cone angles define different angles;
- the first and second bearing surfaces are each shaped to directly contact and mate with a respective bearing surface of the holder;
- and
- the first and second bearing surfaces are adjacent to one another.
4 more elements
A rotatable tool holder for a rotary tool, comprising:
- a holder opening with a tapered threaded inner surface threadably mateable with a tapered external surface of the rotary tool;
- a supporting region situated between a front side of the tool holder and the inner thread;
- the supporting region formed by two conical contact surfaces with different cone angles each shaped to directly contact and mate with corresponding surfaces of the rotary tool;
- cones which are defined by the two conical contact surfaces have apexes which point in the same direction;
- and
- the two conical contact surfaces are directly adjacent to one another.
3 more elements
A tool assembly, comprising:
- a rotary tool including:
- a tool head having a working surface and a conical head bearing surface formed in the tool head and defining a first cone angle;
- and
- a tool shank having a peripheral surface defining an outer periphery of the shank, the tool shank including an external thread integrally formed upon the peripheral surface, the tool shank and the thread thereby formed as one piece, the tool shank further having a conical shank bearing surface formed in the shank and defining a second cone angle, the shank bearing surface positioned along the peripheral surface;
- the first and second cone angles define different angles;
- cones defined by the first and second cone angles are coaxial and have apexes which point in the same direction;
- and
- the head and shank bearing surfaces are adjacent to one another;
- and
- a tool holder including:
- a holder opening;
- an inner thread formed upon a tapered inner surface of the holder and mateable with the thread of the tool shank;
- a front bearing surface situated upon a front side of the tool holder mateable with the head bearing surface;
- an inner bearing surface situated adjacent to the inner thread, the inner bearing surface mateable with the shank bearing surface;
- the front and inner bearing surfaces defining relatively different cone angles, the front and inner bearing surfaces shaped to directly and matingly engage with the head and shank bearing surfaces;
- and
- cones defined by the front and inner bearing surfaces point in the same direction and are adjacent to one another.
14 more elements
Dependencies are inferred from the claim text.