Vehicle Fluid Machine Terminal Protection via Integrated Wall
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Solution Overview
Problem
Existing fluid machines for vehicles face the challenge of protecting connecting terminals from deformation-induced short circuits due to external forces, which requires additional parts for protection, increasing the number of components.
Innovation Solution
The fluid machine incorporates a partitioning wall and peripheral walls to form separate motor and circuit chambers, with connecting terminals extending through the partitioning wall and a mounting lug that strengthens the peripheral wall, ensuring the terminals are protected without additional parts by distributing external forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protector and additional fixing part are added to protect the connecting terminal, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent merges the protector function with the existing peripheral wall structure. The peripheral wall is extended radially outward to form an integrated protective structure that both supports the housing and shields the connecting terminal, eliminating the need for separate protector components and fixing parts.
Solution Approach 2:
The peripheral wall serves multiple functions: it provides structural support for the housing, acts as a mounting surface for the compressor, and simultaneously functions as a protector for the connecting terminal. This multi-functionality reduces the overall number of parts while maintaining reliability.
2Reliability
If the housing is made more robust to prevent deformation, then the reliability is improved, but the weight increases
Solution Approach 1:
Instead of uniformly thickening the entire housing, the patent applies localized reinforcement by extending the peripheral wall radially outward only in the specific region where the connecting terminal is located. This provides targeted protection against deformation-induced short circuits while minimizing additional weight.
Data Source
AI summary
A fluid machine for a vehicle includes a rotary shaft, an electric motor having a coil, a drive circuit, and a housing having therein a motor chamber and a circuit chamber. The housing includes a partitioning wall partitioning between the motor chamber and the circuit chamber and a peripheral wall extending from the partitioning wall. The partitioning wall and the peripheral wall form the circuit chamber. The drive circuit includes a circuit board having a surface and an electronic component mounted on the surface of the circuit board. A connecting terminal is disposed extending through the partitioning wall and electrically connecting the coil with the drive circuit. A mounting lug is formed extending from the peripheral wall so as to mount the housing to the vehicle. The electronic component, the connecting terminals and the mounting lug are disposed in this order in the radial direction of the rotary shaft.