Electromagnetic Retarder Alignment Reliefs for Stable Braking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing fixation methods of electromagnetic retarders on driving mechanisms result in axial deviations due to clearance between housing and stator support holes, leading to irreversible degradation of braking efficiency.
Innovation Solution
The use of reliefs on the stator support and housing, extending along the axial direction, to precisely fix the stator support's position relative to the housing, preventing translations along perpendicular directions, thereby maintaining alignment and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screws are used to fix the electromagnetic retarder onto the housing, then the fixation is simple and inexpensive, but axial deviation of 1 to 3 millimeters occurs between the stator support and housing, leading to degradation of braking efficiency
Solution Approach 1:
The patent applies preliminary action by providing reliefs (milling slots) on the stator support and complementary reliefs on the housing before the final screw fixation. These reliefs pre-establish the precise axial alignment between components, ensuring that when screws are tightened, the components are already positioned correctly with minimal axial deviation (less than 0.5mm), thereby preventing degradation of braking efficiency while maintaining the simplicity of screw-based fixation
2Ease of operation
If clearance exists between housing holes and stator support holes to facilitate assembly, then assembly is easier, but axial deviation occurs that degrades electromagnetic retarder performance
Solution Approach 1:
The patent introduces reliefs as intermediary features between the housing and stator support. These reliefs act as mediators that guide the stator support into precise axial alignment with the housing during assembly. The reliefs work in conjunction with the clearance holes - the reliefs establish precise positioning while the clearance holes allow easy insertion, thus resolving the contradiction between assembly ease and braking efficiency
3Reliability
If the distance between rotor and stator is reduced to ensure braking efficiency, then braking performance improves, but the system becomes more sensitive to axial deviation
Solution Approach 1:
The patent applies preliminary action through reliefs that pre-establish precise axial alignment between the stator support and housing before the components are fully assembled and tightened. This preliminary positioning ensures that even when the rotor-stator distance is minimized for optimal braking efficiency, the alignment remains precise (axial deviation less than 0.5mm), preventing irreversible degradation and maintaining high braking performance
Data Source
AI summary
An assembly comprising a rotational driving mechanism of a drive shaft, and an electromagnetic retarder capable of slowing down the rotation of the drive shaft. The driving mechanism has a housing and a drive shaft extending along an axial direction. The electromagnetic retarder has a stator support fixed to the housing that has at least one relief extending along the axial direction, and in that the housing comprises at least one complementary relief cooperating with at least part of the relief of the stator support to fix the position of the stator support in relation to the housing along at least one direction contained in a plane perpendicular to the axial direction.