Motor Housing Connector Layout for Temperature and Resolver Harnesses
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Solution Overview
Problem
Existing vehicle drive systems face challenges in routing harnesses for temperature and rotational state sensors outside the motor housing without a hollow shaft structure, particularly when the sensors are positioned at different locations, leading to layout difficulties.
Innovation Solution
A vehicle drive system design that includes a motor housing with open sides, covered by cover members, allowing temperature and resolver harnesses to pass through separate windows and connectors, eliminating the need for a hollow shaft by using connectors that penetrate the cover and housing, thus facilitating a layout without local concentration of harnesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the temperature sensor and resolver are placed inside the housing to protect them from external environment, then the sensors are protected from water and dust, but the harnesses need to be routed outside the housing which becomes difficult when sensors are at different locations
Solution Approach 1:
The patent divides the housing into multiple sections with separate opening positions. The temperature sensor is placed at a first opening position while the resolver is placed at a second opening position, allowing their harnesses to be routed separately through different cover member locations rather than forcing both through a single centralized path.
Solution Approach 2:
The patent utilizes the spatial distribution of the housing surface by placing openings at different positions and orientations. The first and second openings are positioned at different locations on the cover member, enabling harnesses to exit the housing through separate pathways in different spatial dimensions, avoiding harness concentration.
2Ease of manufacture
If both harnesses pass through the same hollow shaft structure, then the layout is simplified, but it becomes challenging when sensors are positioned at different locations
Solution Approach 1:
Instead of using a single hollow shaft for both harnesses, the patent implements separate opening positions (first opening position and second opening position) on the cover member. This segmentation allows each sensor harness to have its own dedicated pathway, accommodating different sensor positions while maintaining manufacturing simplicity.
Solution Approach 2:
The cover member is designed with multiple opening positions that can accommodate different sensor configurations. This universal design allows the same cover member structure to work with various sensor placements, providing both layout simplicity and positioning flexibility.
3Device complexity
If multiple harnesses are concentrated at a single location, then the routing path is simplified, but the layout becomes difficult when sensors are at different locations
Solution Approach 1:
The patent distributes the harness exit points across different locations on the cover member surface. The first opening position and second opening position are spatially separated, allowing harnesses to diverge early in their routing paths rather than converging at a single point, which simplifies the overall layout despite the additional opening positions.
Data Source
AI summary
A vehicle drive system including a motor, a temperature sensor, and a resolver includes a motor housing accommodating the motor, the temperature sensor and the resolver, and being open at one side in a motor axial direction, a cover member covering the opening, and temperature sensor and resolver harnesses connected in a first end part to the temperature sensor and the resolver, respectively. The cover member has a window for passing the temperature sensor harness. A temperature sensor connector connectable to a first external harness is attached to the cover member to penetrate a part thereof separated from the window. The temperature sensor connector is connected to a second end part of the temperature sensor harness. A resolver connector connectable to a second external harness is attached to and penetrates the motor housing. The resolver connector is connected to a second end part of the resolver harness.