Ventilator Drive Screwless Mounting via Bayonet Interlocking
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Solution Overview
Problem
The mounting of structural components in ventilators with electrical drives, particularly radial or diagonal impellers, is costly and complicated due to the need for multiple screws, leading to high material expenses and complex assembly processes.
Innovation Solution
A connection method using positive and non-positive intermeshing connection means, such as engagement elements and engagement openings, allows for screwless attachment of functional units like impellers and diffusers directly or indirectly to the electrical drive or its housing, utilizing a reversible and secure interlocking mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screw connections are used to attach functional units to the electrical drive, then the connection is secure and reliable, but the mounting expense and material costs increase significantly
Solution Approach 1:
The patent removes screws entirely from the connection system, extracting the fastening function from traditional threaded fasteners and replacing it with a screwless attachment mechanism using bayonet-style connection elements that engage through geometric interlocking and elastic deformation
Solution Approach 2:
The patent replaces the mechanical screw-threaded connection system with an elastic-mechanical system where connection elements utilize elastic deformation and geometric interlocking to achieve secure attachment without threaded fasteners
2Strength
If multiple screws are used for each functional unit, then the connection strength is sufficient, but the assembly process becomes complicated and time-consuming
Solution Approach 1:
The patent merges multiple screw fastening operations into a single bayonet-style connection action, where one rotational movement simultaneously engages multiple connection elements and achieves the fastening function that previously required multiple separate screw operations
Solution Approach 2:
The patent segments the connection function into multiple independent connection elements (at least two) distributed around the connection interface, allowing the overall connection strength to be achieved through the combined action of segmented elements rather than multiple screws per element
3Reliability
If screws are used for mounting functional units, then the connection is secure, but material costs and waste increase
Solution Approach 1:
The patent extracts screws from the assembly, eliminating the need for these metal fastening components entirely and replacing them with integrated connection elements that are either permanently molded into the functional units or reused across multiple assemblies
Solution Approach 2:
The patent enables recovery and reuse of connection elements, as the bayonet-style connectors can be detached and reattached to different functional units, eliminating the need to discard or replace fasteners with each assembly cycle
Data Source
AI summary
Disclosed is a ventilator with an electrical drive and at least one rotating or non-rotating functional unit associated with the drive or with a structural component of the drive for generating and/or influencing an air current, wherein the functional unit is arranged coaxially around the drive or in front of it or after it, and wherein the association takes place directly or indirectly in a positive and non-positive manner by the intermeshing and mutual bracing of connection means.