Rotary Tool Coupling Dovetail Segments Axial Pull-Out
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Solution Overview
Problem
Existing rotary tool couplings require complex geometries and supplementary means to ensure axial securement, torque transmission, and centering, making them inefficient and prone to axial pull-out during drill retraction.
Innovation Solution
A simplified tool coupling design featuring a coupling receptacle and pin with matching geometry, including clamping and torque segments that form a dovetail connection, providing axial securement, torque transmission, and centering without stepped geometries or additional centering means, utilizing chip flutes for enhanced stability and elasticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex geometries and supplementary means are used in tool coupling, then axial securement, torque transmission, and centering are ensured, but device complexity increases
Solution Approach 1:
The coupling pin is divided into functional segments: clamping segments for axial securement and torque segments for torque transmission and centering. This segmentation allows each part to perform its specific function efficiently without requiring complex overall geometry
Solution Approach 2:
The torque segments serve multiple functions simultaneously: they transmit torque from carrier to cutting head, provide radial centering forces, and contribute to axial securement through their inclined configuration. This multi-functionality reduces the need for separate supplementary means
2Reliability
If complex geometries and supplementary means are used in tool coupling, then axial securement, torque transmission, and centering are ensured, but device complexity increases
Solution Approach 1:
The coupling pin is divided into functional segments: clamping segments for axial securement and torque segments for torque transmission and centering. This segmentation allows each part to perform its specific function efficiently without requiring complex overall geometry
Solution Approach 2:
Different segments of the coupling pin have locally optimized properties: torque segments are positioned and angled specifically for torque transmission, while clamping segments are configured for axial securement. This local optimization achieves reliable torque transmission without complex global geometry
3Reliability
If complex geometries and supplementary means are used in tool coupling, then axial securement, torque transmission, and centering are ensured, but device complexity increases
Solution Approach 1:
The torque segments serve multiple functions simultaneously: they transmit torque from carrier to cutting head, provide radial centering forces, and contribute to axial securement through their inclined configuration. This multi-functionality reduces the need for separate supplementary means
Solution Approach 2:
The opposed arrangement of torque segments creates localized radial forces that act on the cutting head to center it with respect to the rotation axis. This local centering action is integrated into the torque transmission segments rather than requiring separate centering features
4Power
If conventional coupling designs are used, then torque transmission is achieved, but axial pull-out prevention is insufficient during drill retraction
Solution Approach 1:
The coupling pin is divided into functional segments: clamping segments for axial securement and torque segments for torque transmission and centering. This segmentation allows each part to perform its specific function efficiently without requiring complex overall geometry
Solution Approach 2:
The inclined configuration of the torque segments changes the mechanical parameters by converting radial forces into axial components during assembly, creating a self-tightening effect that prevents pull-out during drill retraction
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves reliable axial pull-out prevention, secure fit, and efficient torque transmission while eliminating the need for complex geometries and supplementary centering elements, resulting in a robust and simplified rotary tool coupling.
Implementation Method 1
the clamping segments exert on the assigned areas of the cutting head a radial force, directed toward the axis of rotation, so that the opposed arrangement of the clamping segments has the effect that a centering takes place
Implementation Method 2
the torque segments are arranged at an angle to the clamping segments, in particular at an angle of approximately 90°, and serve for the torque transmission
Implementation Method 3
the segments of at least one pair of segments, preferably the torque segments, are oriented such that they are obliquely inclined in relation to the axis of rotation to form an undercut acting in the axial direction
Implementation Method 4
a relative movement of the coupling pin in relation to the coupling receptacle takes place, so that the mutually assigned segments of the coupling receptacle and the coupling pin are brought into engagement with one another
Data Source
AI summary
A rotary tool extends in the direction of an axis of rotation and includes a carrier having a coupling receptacle disposed at an end face, the carrier having a carrier cross section. The coupling receptacle is delimited in the entire region of the carrier cross section by an outer web having an end face forming a planar bearing area. The coupling receptacle is delimited by side walls which extend step-free from the bearing area to a bottom area and include a pair of opposing clamping segments extending in the circumferential direction and a pair of opposing torque segments arranged at an angle thereto. The tool also includes a cutting head exchangeably fastened to the carrier, the cutting head having a coupling pin disposed in the coupling receptacle. At least one of the pairs of segments is oriented inclined in relation to the axis of rotation.