Rotatable Disc Blade Assembly With Angular Locking for Safer Grooving
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Solution Overview
Problem
Current modular and sectional rotatable tool-assemblies for making rectilinear grooves on wooden panels are hazardous due to the potential for disc blades and chippers to rotate independently, leading to violent impacts and detachment of cutting inserts, posing a risk to safety.
Innovation Solution
A modular and sectional rotatable tool-assembly with disc blades and spacer elements that are mechanically coupled to prevent relative rotation, featuring a design where cutting inserts are firmly fixed and housed in receiving seats on the teeth, ensuring the disc blades and spacer elements engage in an angularly rigid manner, thus eliminating the risk of accidental impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the two lateral disc blades and chippers are locked together by friction through compression from the spindle, then the tool-assembly can be simplified in structure, but the reliability deteriorates because the components can rotate independently if the spindle loosens
Solution Approach 1:
The patent introduces an intermediary mechanical coupling system between the disc blades and chippers. This coupling uses teeth and corresponding receiving seats that engage positively to prevent relative rotation. The intermediary mechanism translates the simple compression force from the spindle into a rigid angular connection, resolving the contradiction between structural simplicity and reliability.
Solution Approach 2:
The tool-assembly is segmented into distinct components (disc blades, chippers, spacer elements) that can be independently manufactured and assembled. Each component has specifically designed engagement features (teeth, receiving seats) that when combined, create the rigid angular connection. This segmentation allows for modular assembly while maintaining overall structural integrity and reliability.
2Ease of manufacture
If the disc blades and chippers are held together only by frictional compression, then the ease of manufacture is improved, but the object-generated harmful factors worsen due to the risk of violent impacts and insert detachment
Solution Approach 1:
The mechanical coupling acts as an intermediary that transforms the simple friction-based holding method into a secure engaged connection. The teeth and receiving seats provide a positive mechanical lock that prevents the harmful relative motion between components, eliminating the safety hazards while maintaining ease of assembly through simple engagement features.
Solution Approach 2:
The design incorporates preliminary anti-action by providing receiving seats that are specifically shaped to accommodate and secure the cutting inserts. This preliminary design feature prevents the inserts from detaching during operation, countering the potential harmful effect of insert ejection before it can occur.
3Ease of manufacture
If the cutting inserts are not firmly fixed in receiving seats, then the ease of manufacture is improved, but the reliability deteriorates due to stress on inserts during operation
Solution Approach 1:
The receiving seats are designed with specific local qualities - particular shapes and dimensions tailored to each cutting insert type. This local customization ensures optimal fit and retention for each insert position, maintaining reliability while keeping the manufacturing process simple through standardized seat geometries that accommodate different inserts.
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 mechanical coupling between disc blades and spacer elements prevents accidental rotation and reduces stress on cutting inserts, enhancing safety by preventing detachment and violent impacts, maintaining tool stability and safety during operation.
Implementation Method 1
The mechanical coupling between disc blades and spacer elements prevents relative rotation between these components
Implementation Method 2
the two lateral disc blades and the possible chippers are locked together by friction, thanks to the compression exerted by the spindle
Data Source
AI summary
A rotatable tool-assembly for processing wooden panels and the like, of the type comprising at least a first and a second disc blades that are adapted to be fitted on a same spindle, one beside and coaxial with the other; said first and said second disc blades being both provided with a central discoidal body and a cutting toothed crown that comprises a plurality of protruding teeth at least one of which has the front edge covered by a cutting insert; the cutting toothed crown of the first disc blade being structured so as to be able to mesh in an angularly rigid manner with the cutting toothed crown of the second disc blade and vice versa.