Steering Harness Layout for Torque Sensor Assembly Clearance
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Solution Overview
Problem
The existing steering devices face challenges in improving assembly workability when connecting a torque sensor on the pinion shaft side with a controller on the rack shaft side due to interference issues with harnesses and incorrect assembly.
Innovation Solution
The steering device is designed with a sensor-side connector angled to the pinion shaft, shorter first harness, and terminals positioned closer to the pinion shaft, along with corrugated tubes for the harnesses to prevent interference and ensure correct assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two-system wiring is used to connect torque sensor and controller, then reliability is improved, but assembly workability deteriorates due to harness interference with adjust screws
Solution Approach 1:
The sensor-side connector is oriented at an angle to the pinion shaft, changing the spatial dimension of connection. This angular orientation allows the harness to route away from the adjust screw area, eliminating interference while maintaining the redundant two-system wiring configuration for improved reliability
Solution Approach 2:
The first harness is designed shorter than the second harness, creating asymmetric wiring lengths. This asymmetry allows the shorter first harness to clear the adjust screw interference zone while the longer second harness provides sufficient reach, enabling both redundant connections to be made without interference
2Ease of operation
If terminals are positioned closer to pinion shaft, then assembly workability is improved, but device complexity increases
Solution Approach 1:
The controller is segmented into a first terminal and a second terminal positioned at different locations. The first terminal is placed closer to the pinion shaft to facilitate easier harness connection, while the second terminal is positioned elsewhere to maintain functional separation and manage complexity through organized distribution
Data Source
AI summary
Provided is a steering device that can be improved in assembly workability. A sensor-side connector is oriented at an angle to a pinion shaft. An EPP includes a first terminal to which a first harness is connected and a second terminal to which a second harness is connected. The first terminal is provided closer to the pinion shaft than the second terminal is. The first harness has length that is set shorter than the second harness.