Motor Housing Sensor Harness Routing Without a Hollow Shaft
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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 complexities.
Innovation Solution
A vehicle drive system design that includes a motor housing with cover members having windows for harness passage, allowing temperature and resolver connectors to be attached externally, facilitating sensor signal output without a hollow shaft, and ensuring sensors are spaced apart to simplify layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the temperature sensor and resolver are placed inside the housing, then the sensors are protected from external environment (water and dust), but routing the harnesses outside becomes difficult without a hollow shaft structure
Solution Approach 1:
The housing is segmented into multiple parts (first housing part and second housing part) that can be separated from each other. The harnesses are routed through the separation space between these segmented housing parts, allowing external connection while maintaining sensor protection inside the housing.
2Measurement precision
If the temperature sensor and resolver are positioned at different locations inside the housing, then accurate detection is achieved, but harness routing becomes more challenging
Solution Approach 1:
The housing is divided into multiple parts with a separation space that can accommodate multiple harnesses. This segmentation allows sensors at different locations to have their harnesses routed externally without interfering with each other, maintaining both detection accuracy and layout simplicity.
Solution Approach 2:
The harness routing problem is solved by utilizing the separation space between housing parts as an additional dimension for harness passage. Instead of routing harnesses through the limited internal space or requiring a hollow shaft, the solution uses the external separation dimension to accommodate multiple harnesses independently.
3Volume of moving object
If multiple harnesses are routed through a single hollow shaft, then the structure is compact, but localized concentration of harnesses occurs making layout difficult
Solution Approach 1:
Instead of using a single hollow shaft for all harnesses, the housing is segmented into multiple parts. Each harness can be routed through the separation space between housing parts, distributing the harnesses spatially rather than concentrating them in a single location, thus improving layout ease while maintaining compactness.
Data Source
AI summary
A vehicle drive system includes a motor housing accommodating a motor, a temperature sensor, and a resolver, and being open at one side in a motor axial direction, a first cover member covering the opening, a second cover member attached to the motor housing on an opposite side from the opening, and temperature sensor and resolver harnesses connected in a first end part to the temperature sensor and the resolver, respectively. The first cover member has a first window for the temperature sensor harness. A temperature sensor connector and a resolver connector connectable to first and second external harnesses are attached to the first and second cover members, respectively. The temperature sensor and resolver connectors are connected to a second end part of the temperature sensor and resolver harnesses, respectively. The motor housing has a second window for the resolver harness, on a side of the second cover member.