Slurry Wall Cutter Wheel Assembly with Interlocking End Teeth
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Solution Overview
Problem
Existing slurry wall cutters face challenges in quickly and efficiently replacing cutting wheels due to complex clamping mechanisms that require multiple screws and are prone to wear, especially when transferring high forces and torques.
Innovation Solution
The cutting wheel assembly features end faces with interlocking toothed arrangements that securely engage and transfer forces without friction, allowing for simple assembly and disassembly by axial pushing, supplemented by axial clamping means for additional stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple screws are used to clamp the cutting wheel to the cutter hub, then the force and torque transfer is improved, but the assembly complexity and time increase
Solution Approach 1:
The connection interface is segmented into two parts: a frictionless segment (the bearing surface between cutting wheel and cutter hub) and a form-fitting segment (the toothed arrangements). This segmentation allows the frictionless bearing surface to handle axial forces while the toothed arrangements handle torque and radial forces, eliminating the need for multiple clamping screws and simplifying the assembly mechanism.
2Reliability
If multiple screws are used to clamp the cutting wheel, then the connection stability is improved, but the replacement time increases
Solution Approach 1:
The connection is segmented into frictionless axial support (bearing surface) and form-fitting radial/torque support (toothed arrangements). This allows the cutting wheel to be securely connected through simple axial pushing without the time-consuming operation of tightening multiple screws, while maintaining connection stability through the interlocking toothed arrangements.
Solution Approach 2:
The screw-based mechanical fastening system is replaced with a form-fitting toothed arrangement system. Instead of using threaded fasteners that require torque application and tightening, the invention uses interlocking teeth that engage through simple axial movement, dramatically reducing replacement time while maintaining connection reliability.
3Ease of operation
If friction-based clamping is used, then the assembly is simple, but wear increases under high forces and torques
Solution Approach 1:
The force transfer is segmented into axial forces (handled by frictionless bearing surface) and radial/torque forces (handled by form-fitting toothed arrangements). This segmentation eliminates the need for friction-based clamping that causes wear under high loads, as the toothed arrangements provide positive mechanical engagement that is resistant to wear from high forces and torques.
Solution Approach 2:
The friction-based mechanical clamping system is replaced with a form-fitting toothed engagement system. Instead of relying on friction between clamped surfaces to transfer high forces and torques (which causes wear), the invention uses interlocking teeth that provide positive mechanical engagement, eliminating wear while maintaining assembly simplicity through axial pushing.
4Loss of time
If a bayonet fitting is used for quick connection, then the assembly time is reduced, but the connection becomes unstable in reverse rotation
Solution Approach 1:
The bayonet fitting system is replaced with a form-fitting toothed arrangement system that engages through axial pushing. Unlike bayonet fittings that rely on wedge-shaped clamping in one rotational direction (which becomes unstable in reverse rotation), the toothed arrangements provide symmetric engagement that is stable in both rotational directions, eliminating connection instability while maintaining quick assembly through axial movement.
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
This design reduces assembly time and minimizes wear, ensuring efficient and reliable transfer of operating forces and torques while maintaining a tilt-resistant connection.
Implementation Method 1
end faces with interlocking toothed arrangements that securely engage and transfer forces without friction
Implementation Method 2
supplemented by axial clamping means for additional stability
Data Source
AI summary
The present invention relates in general to slurry wall cutters for cutting slurry walls in specialist foundation engineering. The invention relates in particular to the cutting wheel assembly for such a slurry wall cutter (1), comprising a rotationally drivable cutter hub (8) and a cutting wheel (3) which can be detachably fastened to the cutter hub for conjoint rotation. According to the invention, the cutting wheel and the cutter hub are clamped against one another at the end faces thereof and are interlockingly secured to one another in order to transmit the high operating forces non-frictionally or at least not only frictionally. According to the invention, the end faces of the cutting wheel and the cutter hub that can be placed against one another are provided with lateral teeth (16, 17) which mesh with one another for conjoint rotation. The meshing pair of lateral teeth allows the cutter hub and the cutting wheel to be interlockingly held relative to one another for conjoint rotation. At the same time, the end faces lying against one another can also transmit axial forces such that the cutting wheel is untiltably held in place.