Electric Motor Distributor Ring Adhesive Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric motor designs face challenges in efficiently connecting the active part to the rotor shaft with minimal force, leading to potential imbalance and adhesive leakage issues, especially at high speeds.
Innovation Solution
The electric motor design incorporates a distributor ring with an annular groove that allows for radial outward inlet and diametrically opposed outlet openings, enabling even adhesive distribution between the distributor ring, active part, and shaft, forming cohesive connections and preventing imbalance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesive is injected through a single inlet opening, then the production process is simple, but the adhesive distribution around the circumference is uneven
Solution Approach 1:
The single inlet opening is segmented into multiple outlet openings (first outlet opening and second outlet opening) that are diametrically opposed to each other. This segmentation allows adhesive to be distributed through multiple paths, achieving uniform circumferential distribution while maintaining the simplicity of a single injection point.
Solution Approach 2:
The distributor ring acts as an intermediary component between the inlet opening and the gap. It receives adhesive through the single inlet opening and redistributes it through multiple outlet openings into the annular groove, ensuring uniform adhesive distribution around the circumference before the adhesive reaches the gap between the active part and shaft.
2Strength
If the active part is firmly connected to the shaft, then the connection strength is high, but the force required for connection is high
Solution Approach 1:
The connection approach transitions from direct radial compression to a multi-dimensional process: adhesive is injected axially through the inlet opening, distributed circumferentially through the distributor ring and annular groove, and then radially into the gap between the active part and shaft. This multi-dimensional adhesive distribution achieves strong bonding with reduced assembly force.
Solution Approach 2:
The patent utilizes fluid dynamics by injecting adhesive under pressure through the inlet opening and allowing it to flow through the annular groove and into the gap. The hydraulic pressure distribution mechanism ensures uniform adhesive filling of the gap between the active part and shaft, achieving strong connection with controlled force application.
3Manufacturing precision
If adhesive is injected under pressure, then the adhesive fills the gap effectively, but adhesive leakage may occur
Solution Approach 1:
The distributor ring with its annular groove serves as an intermediary containment structure. It receives pressurized adhesive through the inlet opening and controls its flow into the gap through diametrically opposed outlet openings. This intermediary structure distributes the pressure uniformly and prevents adhesive from leaking axially, confining it to the intended radial path into the gap.
Solution Approach 2:
The distributor ring provides localized containment and control at different positions: the annular groove contains adhesive radially, the outlet openings control the local flow into the gap, and the overall structure prevents axial leakage. This localized quality control at different positions ensures effective gap filling without adhesive leakage.
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 ensures even adhesive distribution and cohesive connections between components, preventing rotor imbalance and adhesive leakage, while simplifying production and ensuring a well-defined axial position of the active part.
Implementation Method 1
the adhesive can be fed through a single inlet opening during production of the electric motor, in particular by being pressed in under pressure
Implementation Method 2
the adhesive can then be guided to the outlet openings. These outlet openings are diametrically opposite one another. From there, the adhesive enters the gap between the distributor ring and the shaft and is distributed more evenly around the circumference
Implementation Method 3
Once the adhesive has hardened, this creates a material-to-material bond between the distributor ring and the active part, as well as between the active part and the shaft and also between the distributor ring and the shaft
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to an electric motor having an active part placed onto a shaft, in particular onto a rotor shaft, wherein: a distributor ring is placed onto the shaft and touches the active part; the distributor ring has an annular groove, which leads radially outward, in particular into the surroundings, via an inlet opening and leads into a gap, which is arranged between the distributor ring and the shaft, via outlet openings; the gap is arranged radially within the annular groove, and/or the radial distance range covered by the annular groove is arranged radially outside of the radial distance range covered by the gap; gap regions (9) each leading into the gap are formed between the active part and the shaft.