Stator Coil Transfer Device Radial Extraction Drive
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Solution Overview
Problem
Current methods for transferring stator windings from an annular support to a stack of laminations in rotating electric machines often require multiple phases due to limited space, making it difficult to transfer the entire winding in a single operation.
Innovation Solution
A transfer device with a drive disc mounted coaxially around the main axis, featuring extraction blades that slide radially using a drive ring system, allowing simultaneous transfer of the winding from the annular support to the stack of laminations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a central shaft with ramp-shaped portions is used to drive radial blades, then the winding can be transferred from the annular support to the stack of laminations, but the device complexity increases and the volume available at the center is insufficient
Solution Approach 1:
The invention extracts the central shaft structure from the system and replaces it with a drive disc positioned at the periphery of the annular support. This eliminates the complex central shaft while maintaining the winding transfer capability through radial extraction blades that are driven by the rotating drive disc.
Solution Approach 2:
The invention moves the drive mechanism from the central axial dimension to the radial dimension by positioning the drive disc at the periphery of the annular support. The drive disc rotates in the radial plane and drives extraction blades through radial movement, effectively solving the space constraint at the center by utilizing the radial dimension.
2Productivity
If the entire winding is transferred in a single operation, then productivity increases, but the device complexity increases due to space constraints at the center
Solution Approach 1:
The invention segments the drive mechanism into multiple extraction blades distributed around the periphery of the annular support, each driven by a rotating drive disc. This segmentation allows simultaneous operation of multiple blades to transfer the entire winding in one operation, achieving high productivity without requiring a complex central shaft structure.
3Device complexity
If multiple phases are used to transfer the winding, then the device structure is simpler, but the manufacturing time increases
Solution Approach 1:
The invention enables continuous useful action by allowing all extraction blades to operate simultaneously in a single rotation of the drive disc. This continuous simultaneous action transfers the entire winding in one operation, eliminating the time loss associated with multiple phased operations while keeping the device structure relatively simple.
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
Enables the complete transfer of the winding in a single operation by utilizing a drive disc and extraction blades that rotate radially, overcoming the space constraints and facilitating efficient assembly.
Implementation Method 1
extraction blades that slide radially using a drive ring system
Data Source
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AI summary
The invention relates to a device (108) for transferring a coil (110) from a rotary electric machine stator, which is mounted on an annular support (78), to a lamination pack (10) of the stator. The inventive device includes: a fixed body (112) on which the lamination pack (10) and the annular support (78) are mounted; a plurality of extraction segments (98) which can slide radially in the associated groove (86), such as to push the axial strands (34) of the coil (110) radially outward, said coil (110) being received in the associated groove (86); and means (100, 116, 118) for driving the extraction segments (98) such that they slide radially in the grooves (86) in the annular support (78). The invention is characterised in that the drive means are configured to drive each extraction segment (98) such that it slides radially over a distance that is at least equal to the radial length of the groove (86).