Steering Intermediate Shaft Phase Angle Torque Variation
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Solution Overview
Problem
Designing a steering device with an intermediate shaft that accounts for manufacturing errors and torque variations caused by tilt changes, requiring repetitive verification of torque and spatial arrangement to ensure it falls within a predetermined allowable torque variation.
Innovation Solution
A design assisting apparatus and method that includes a storage unit for coordinates of key reference points, a reference point arrangement unit, a phase angle calculation unit, and an allowable range determination unit to assess and display the phase angle error within the allowable torque variation rate, facilitating the selection of mass production components to meet design criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the intermediate shaft is disposed to equalize rotational angular velocities, then power transmission between non-coaxial shafts is achieved, but manufacturing errors and tilt changes cause torque variation that requires repetitive verification
Solution Approach 1:
The patent pre-calculates and stores the relationship between phase angles and torque variations in a lookup table before actual design verification. This preliminary action allows the design verification apparatus to quickly retrieve and compare torque variation data without performing repetitive complex calculations, thereby reducing design verification complexity while maintaining power transmission reliability
Solution Approach 2:
The patent creates a virtual model of the intermediate shaft system with predefined phase angle and torque variation characteristics. This virtual copy allows designers to verify torque variations within acceptable ranges without physically constructing and testing multiple intermediate shaft configurations, reducing the complexity of repetitive verification while ensuring reliable power transmission
2Stability of the object's composition
If the intermediate shaft module is disposed with specific angle relationships, then rotational angular velocities are equalized, but spatial arrangement verification becomes complex
Solution Approach 1:
The patent replaces complex mechanical spatial arrangement verification with a computational approach. The design verification apparatus calculates phase angles and compares them against predetermined acceptable ranges using stored data, substituting physical measurement and verification of spatial arrangements with efficient computational comparison, thereby reducing verification difficulty while maintaining rotational velocity stability
Solution Approach 2:
The patent transforms the verification problem from checking complex spatial arrangements to comparing scalar phase angle parameters. By converting spatial relationship verification into a simple parameter comparison task (phase angle within acceptable range), the system maintains rotational velocity stability while significantly reducing the difficulty of detection and measurement
3Manufacturing precision
If repetitive verification of torque and spatial arrangement is performed, then torque variation within allowable range is ensured, but design time and effort increase
Solution Approach 1:
The patent pre-calculates torque variations for various phase angles and stores this data in a lookup table before the actual design verification process. This preliminary computation eliminates the need for repetitive torque calculations during design verification, allowing rapid checking of whether torque variations remain within allowable ranges while maintaining manufacturing precision
Solution Approach 2:
The patent creates a virtual representation of torque variation characteristics stored in the database. This virtual copy allows multiple design verification operations to reference the same pre-computed data without repeating the actual torque calculation process, significantly reducing design verification time while ensuring torque variation control remains within specified limits
Data Source
AI summary
A design assisting apparatus of a steering device arranges a coordinate of a handle position reference point, a coordinate of a first universal joint reference point, a coordinate of a second universal joint reference point, and a coordinate of a steering gear reference point in a three-dimensional space, calculates a reference axis passing through the second universal joint reference point from the first universal joint reference point, calculates a phase angle which is an angle between a straight line from the handle position reference point to the first joint reference point when viewed along the reference axis and a straight line from the second joint reference point to the steering gear reference point when viewed along the reference axis, and determines success or failure of a condition in which the allowable range of the phase angle allowable error is included in the allowable range of the allowable torque variation rate.