Clamping device for fixing a tool disk to a machine tool, machine tool and fixing method

EP4534245A1Inactive Publication Date: 2025-04-09HILTI AG
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Patent Information

Application Number
EP2024202148
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-10-05
Filing Date
2024-09-24
Publication Date
2025-04-09
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing machine tools lack a secure and keyless fastening system for attaching tool discs, especially flat ones, which prevents undesirable contact between the hand knob of the fastening system and the surface being processed.

Method used

A clamping device with a screw that is stored in a coupling module, featuring a first flange and inner contour, allowing for a form-fit attachment of the tool disc to the machine tool and preventing undesirable loosening or tightening of the screw.

Benefits of technology

The clamping device enables a secure, tool-free attachment of tool discs to machine tools, preventing the screw from becoming almost unsolvable or detaching undesirably during operation, thus ensuring safety and ease of use.

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Abstract

The present invention relates to a clamping device for attaching a tool disc (300) to a machine tool, wherein the clamping device comprises a screw that is screwed into a drive spindle (20) of the machine tool to attach the tool disc (300). The screw is mounted in a coupling module of the clamping device, the coupling module having a first flange (17) and an inner contour, wherein the clamping device provides a positive-locking attachment of the tool disc (300) to the machine tool, and wherein a second flange (8) prevents the screw from loosening or tightening unintentionally. In further aspects, the invention relates to a machine tool with a drive spindle (20) to which a tool disc (300) can be attached using the proposed clamping device, and to a method for attaching a tool disc (300) to such a machine tool.
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Citation Information

Patent Citations

  • clamping device FOR THE SAW BLADE IN A CIRCULAR SAW

    DE6909435U

  • Clamping device and hand-held power tool

    EP4227040A1

  • Reversible clamping hub

    US6093090A

  • Clamping device

    WO2017134037A1