Spring-Loaded Rotor Fastening System for Electric Motors
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Solution Overview
Problem
Existing fastening systems between a rotor and a ring component in electric motors, such as those used in fans, often require high assembly effort, cannot be easily detached, and involve additional parts like connecting flanges, which increase complexity and part count.
Innovation Solution
A direct interlocking connection using spring elements and locking hooks and grooves that generate a prestressing force, allowing for a secure and repeatable attachment and detachment without additional parts, where the locking hooks can be pressed out of the grooves to release the connection, and the spring elements provide both axial and radial holding forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screw connections are used to fasten the ring component to the rotor, then a secure connection is achieved, but the assembly effort becomes comparatively high
Solution Approach 1:
The patent replaces the screw connection mechanism with a spring-based elastic connection system. The spring element generates continuous contact force between the ring component and rotor, eliminating the need for threaded fasteners while maintaining secure connection through elastic deformation and continuous pressure.
Solution Approach 2:
The patent changes the connection mechanism from rigid screw fastening to elastic spring-based connection. By utilizing elastic deformation parameters and continuous contact force, the system achieves both secure connection and ease of assembly/disassembly through simple axial movements rather than threaded operations.
2Reliability
If material connections such as gluing are used to fasten the ring component to the rotor, then a secure connection is achieved, but the connection cannot be detached
Solution Approach 1:
The patent employs a dynamic spring-based connection system that allows for reversible attachment and detachment. The elastic spring element maintains continuous contact force during operation, yet permits simple axial separation when detachment is required, providing both security during use and adaptability for reconfiguration.
3Reliability
If a flange bridging the rotor and ring component is used, then connection is achieved, but the number of parts increases
Solution Approach 1:
The patent merges the connection function directly into the rotor structure by integrating locking elements and contact surfaces into the rotor body. This eliminates the need for separate bridging flanges and reducing the overall part count while maintaining secure mechanical connection between the rotor and ring component.
4Reliability
If additional connecting flanges are used, then connection between rotor and ring component is achieved, but the assembly complexity increases
Solution Approach 1:
The patent extracts the connection function from separate bridging components and integrates it directly into the rotor structure. By incorporating locking hooks, contact surfaces, and spring elements directly into the rotor, the system eliminates additional connecting flanges and simplifies the overall assembly process.
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 solution simplifies assembly and disassembly, reduces the number of components, and ensures a secure connection without additional parts, allowing for multiple repeatable engagements and disengagements while maintaining structural integrity.
Implementation Method 1
a prestressing force is generated between the ring component and the rotor via the spring element
Implementation Method 2
form-fit locking by the locking hooks and locking grooves
Data Source
Figure 1
AI summary
The invention relates to a fastening system between two fastening elements, which are designed as a ring component and rotor of an electric motor, wherein at least one of the fastening elements has a locking hook and at least one locking groove is formed on the other fastening element, which engage positively and directly in each other in the fastened state and detachably connect the ring component and the rotor, wherein at least one elastic spring element is formed on one of the fastening elements, which, in the fastened state of the ring component with the rotor, exerts a preload force on the other fastening element, which is directed against a holding force of the at least one locking hook.