EV Motor Attachment Structure for Standardized Case Adaptation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The existing motor attachment structures for electric vehicles are limited by the fixed shape and dimension of the motor case, which restricts the accommodation of various types of motors with different shapes and dimensions, making it difficult to accommodate motors of appropriate types without modifying the case configuration.

Innovation Solution

A motor attachment structure that includes a tubular bearing and a versatile attachment system with a plate-shaped main body and projecting portions, allowing the bearing and stator to be supported at appropriate positions within the case, regardless of the motor type, without requiring complex modifications to the case or separate stator support configurations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the motor case is designed with a fixed shape and dimension to accommodate a specific motor type, then the case structure is simplified and manufacturing cost is reduced, but the adaptability to accommodate various types of motors with different shapes and dimensions is limited

Engineering Contradiction:

Improveadaptability to accommodate various motor typesVSAvoidcase structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The attachment structure is divided into a case portion and a separate attachment portion. The attachment portion includes a bearing support plate with through-holes for bearing support and a stator support plate with recesses for stator support. This segmentation allows the attachment portion to be customized for different motor types while keeping the case structure standardized and simple.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The attachment portion serves multiple functions: it supports the bearing through through-holes, supports the stator through recesses, and provides mounting interfaces for the motor. By making the attachment portion detachable and replaceable, a single case design can accommodate various motor types by simply changing the attachment portion, achieving universality without increasing case complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If the case configuration is modified to accommodate different motor types, then the adaptability is improved, but the manufacturing cost and design complexity increase

Engineering Contradiction:

Improveadaptability to accommodate various motor typesVSAvoidmanufacturing cost and design simplicity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

By separating the case into a case portion and an attachment portion, modifications are confined to the attachment portion only. The case portion maintains a standardized design that can be manufactured efficiently. Different motor types are accommodated by replacing or reconfiguring the attachment portion, which reduces manufacturing cost and design complexity compared to modifying the entire case.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The attachment portion acts as an intermediary between the standardized case and the varied motor types. It provides the necessary adaptation features (through-holes for bearings, recesses for stators) without requiring changes to the case itself. This intermediary approach allows cost-effective accommodation of different motors while maintaining case manufacturing simplicity.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Manufacturing precision

If separate support configurations are provided for the stator and bearing, then the positioning precision is improved, but the device complexity and number of components increase

Engineering Contradiction:

Improvepositioning precision of bearing and statorVSAvoidnumber of support components

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The bearing support plate and stator support plate are merged into a single integrated attachment portion. The attachment portion simultaneously provides through-holes for bearing support and recesses for stator support, achieving precise positioning of both components without requiring separate support structures. This integration reduces the number of components while maintaining positioning precision.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The attachment portion is designed as a multi-functional component that performs multiple support functions: supporting the bearing via through-holes, supporting the stator via recesses, and providing mounting interfaces. This multi-functionality achieves precise positioning of multiple components through a single integrated structure, reducing overall device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12179570B2Motor attachment structure for electric vehicle

Publication Date: 2024.12.31 TOYOTA JIDOSHA KK

AI summary

A motor attachment structure for an electric vehicle includes: a motor generator including a tubular rotor configured to rotate together with a motor output shaft in an integrated manner, and a tubular stator placed radially outwardly from the rotor; a tubular bearing configured to rotatably support a rotating body rotating together with the motor output shaft in an integrated manner; a case in which the motor generator and the bearing are accommodated; and an attachment attached to the case. The attachment supports an outer peripheral surface of the bearing.