Vehicle Door Handle Test Jig Using Rotating Shafts and Springs
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Solution Overview
Problem
Current methods for evaluating door opening prevention devices in vehicles require costly and time-consuming side collision tests on actual vehicles, necessitating redesign and reevaluation, and separate testers for different vehicles, increasing manufacturing costs and decreasing test efficiency.
Innovation Solution
A test jig for vehicle exterior door handles that simulates side collisions by generating inertial acceleration on a door panel, using a setup with rotating shafts, torsion springs, and support springs to replicate the impact and inertia forces, allowing for precise evaluation of handle stroke displacement and door opening prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If side collision tests are conducted on actual vehicles, then evaluation accuracy is improved, but test cost and time increase
Solution Approach 1:
The patent creates a scaled-down test jig that copies the essential dynamics of a full-vehicle side collision test. The test jig replicates the inertial acceleration and force transmission pathways using simplified components (rotating shafts, plates, springs) that mimic the door panel-handle system behavior during actual collision, enabling accurate evaluation without requiring full-vehicle tests
Solution Approach 2:
The patent segments the complex vehicle collision system into isolated testable components. The door panel is represented by plates, the handle by a handle assembly, and the collision dynamics by rotating shafts with springs. This segmentation allows independent testing of the handle's response to collision forces without the complexity and cost of testing the entire vehicle system
2Measurement precision
If separate evaluation testers are manufactured for different vehicles, then test accuracy for specific vehicles is improved, but manufacturing cost increases
Solution Approach 1:
The patent designs a universal test jig platform that can evaluate door handles from different vehicle types through configuration adjustments rather than manufacturing separate testers. The rotating shaft mechanism, plates, and handle mounting system are designed to accommodate various handle geometries and mounting conditions, allowing one test jig to serve multiple vehicle models and handle designs
3Reliability
If door assembly is remanufactured for reevaluation, then test reliability is improved, but manufacturing cost and time increase
Solution Approach 1:
The test jig is designed with pre-configured components and adjustable fixtures that allow rapid reconfiguration for different test scenarios. The rotating shafts, plates, and mounting mechanisms are prepared in advance to accommodate various handle types, eliminating the need to remanufacture door assemblies for reevaluation while maintaining test reliability through consistent, repeatable test setups
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise measurement of door handle stroke due to inertia force during side collisions, reduces manufacturing costs and test duration, and allows for equivalent severity testing across various vehicle types with initial setup conditions.
Implementation Method 1
A first torsion spring providing a torsion moment to the first rotating shaft and the first plates by an elastic restoring force
Implementation Method 2
A first torsion spring providing a torsion moment to the first rotating shaft and the first plates
Implementation Method 3
A first support spring with which a forward end of the first plate collides to be elastically supported when the first plate rotates
Data Source
AI summary
A test jig for an exterior door handle of a vehicle includes a first rotating shaft rotatably mounted on a vertical frame which is perpendicular to a horizontal frame that is supported on the ground. First plates are attached to both ends of the first rotating shaft to concurrently rotate with the first rotating shaft about a strike object by an elastic restoring force. A second rotating shaft is rotatably connected between the first plates. A second plate is attached to the second rotating shaft to concurrently rotate with the second rotating shaft about the strike object by the elastic restoring force when a handle is mounted.