Power Transmission Case Layout for Simpler Pump Cable Routing
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Solution Overview
Problem
The routing of power supply cables within vehicle driving devices is complex due to the need to avoid interference with internal components, leading to a need for simplification.
Innovation Solution
A power transmission device design with a case that includes a first chamber housing the power transmission mechanism and a second chamber for the control valve and electric pump, where the control valve and electric pump are arranged upright, and a recess is formed above the electric pump to accommodate the power connector facing upwards, allowing for easier cable routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the power supply cable is routed from the bottom to the top of the case while avoiding interference with internal components, then the electric oil pump can be positioned at the bottom of the case, but the routing of the power supply cable becomes complex
Solution Approach 1:
The connector is repositioned from the bottom surface to the top surface of the electric oil pump, changing the spatial dimension of connection. This allows the power supply cable to be routed horizontally across the top of the pump rather than vertically from bottom to top, simplifying the cable path and reducing complexity while maintaining efficient space utilization in the case
Solution Approach 2:
The connector is pre-integrated into the top surface of the electric oil pump housing during manufacturing, with the cable connection point prepared in advance. This preliminary arrangement of the connector position and structure eliminates the need for complex cable routing adjustments during assembly, simplifying the overall installation process
Data Source
AI summary
A power transmission device includes a case that houses a power transmission mechanism, a control valve configured to control an oil pressure supplied to the power transmission mechanism, and an electric pump configured to supply oil to the control valve. The case has a first chamber that houses the power transmission mechanism, and a second chamber that is arranged adjacent to the first chamber. The control valve and the electric pump are arranged upright in the second chamber. In the case, a first recess that is recessed from above the electric pump toward the electric pump is formed in a region that overlaps the electric pump, as viewed from above along an axis of rotation of the electric pump, and a connector of the electric pump is arranged such that a connection part with a mating connector faces up in the first recess.