Rotary Electric Machine Recessed Lead Wire Holder
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rotary electric machines have a volume increase due to protruding lead wire holders and holder mounting portions, leading to inefficient space utilization and requiring additional insulation for lead-out wire connections.
Innovation Solution
A rotary electric machine design with a lead wire holding structure that integrates a lead wire holder and holder mounting portion within a recessed end bracket, eliminating protrusion and allowing for internal insulation through a bush, thus reducing volume and enhancing space utilization without needing additional insulation means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the lead wire holder and holder mounting portion are constructed to protrude from the stator core, then the lead wires can be held and connected, but the volume occupied by the rotary electric machine increases
Solution Approach 1:
The lead wire holder and holder mounting portion are received within the recess formed in the end bracket, creating a nested structure where components are housed inside the end bracket rather than protruding outward. This nesting approach reduces the overall occupied volume while maintaining the lead wire connection functionality.
Solution Approach 2:
The design utilizes the axial direction dimension by forming a recess in the end bracket that accommodates the lead wire holder and mounting portion. By arranging components along the axial direction rather than radially protruding, the patent achieves compact radial dimensions while maintaining connection functionality.
2Device complexity
If two or more lead-out wires are connected directly to two or more lead wires, then connection is simplified, but additional insulation means are required
Solution Approach 1:
The lead wire holder is made of insulating material that provides inherent insulation for the lead wire connections. The holder structure itself serves the dual function of mechanical support and electrical insulation, eliminating the need for separate insulation components and simplifying the overall manufacturing process.
Solution Approach 2:
The lead wire holder is constructed from insulating material that combines mechanical holding functionality with electrical insulation properties. This composite approach uses a single material to fulfill multiple requirements, reducing the need for additional insulation means while maintaining connection simplicity.
Data Source
AI summary
The present invention provides a rotary electric machine, of which the occupied volume can be reduced and which allows a space in an electric apparatus equipped therewith to be utilized effectively. A slot insulator 15 is integrally formed with a holder mounting portion 25, a whole or major part of which is positioned on one of end faces of a yoke 11 of a stator core 7. A lead wire holder 27 includes a connection holding portion 27a for disposing a plurality of connections 30, in which lead-out wires of windings are connected with corresponding core wires 29a of lead wires 29, at a predetermined interval so that the connections do not contact with each other. The lead wire holder 27 is arranged so that the connection holding portion 27a is positioned over a part of the windings 9 and the holder mounting portion 25 when the lead wire holder is attached to the holder mounting portion 25. One end bracket, which faces to one of the end faces of the yoke, is formed with a recess which opens toward both sides in the axial direction thereof as well as opens outwardly in a radial direction of a shaft. The holder mounting portion 25 and lead wire holder 27 are received within the recess when the one end bracket is attached to the one end face of the yoke.