Vehicle Door Handle Input Lever Sub Plate Support
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Solution Overview
Problem
In vehicle door opening and closing apparatuses, the input support shaft protruding from the base plate can become inclined when the inside door handle is operated, affecting operability, and increasing the base plate thickness to prevent this leads to increased weight and reduced formability.
Innovation Solution
A sub plate is installed on the base plate to support the input support shaft, allowing it to be shorter and preventing inclination without increasing the base plate thickness, and the input lever is arranged to rotate integrally with the input support shaft using a shaft interlocking member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the plate thickness of the base plate is increased to prevent the input support shaft from becoming inclined, then the stability and operability are improved, but the weight and manufacturing complexity are increased
Solution Approach 1:
The base plate is segmented into two separate plates: the original base plate and an additional support plate. The support plate is specifically positioned to support the input support shaft, providing the necessary stability without requiring the entire base plate to be thicker. This segmentation allows localized reinforcement only where needed, reducing overall weight while maintaining operability.
2Reliability
If the plate thickness of the base plate is increased to prevent the input support shaft from becoming inclined, then the stability and operability are improved, but the formability is reduced
Solution Approach 1:
Instead of manufacturing a single thick base plate, the structure is divided into a standard-thickness base plate and a separate support plate. Both plates can be manufactured using standard forming processes, and then assembled together. This approach maintains good formability for each individual plate while achieving the structural integrity of a thicker plate through assembly.
Solution Approach 2:
The support plate is combined with the base plate through assembly (bolting or riveting) to create a composite structure. This merging provides the equivalent structural support of a thicker plate while allowing each component to be manufactured separately with standard forming processes, thus preserving formability.
Data Source
AI summary
A vehicle door opening and closing apparatus includes: an input lever configured to rotate when door opening operation is performed on an inside door handle arranged inside a vehicle; and an output lever rotatably arranged on a base plate. By transmission of rotation of the input lever to the output lever when the input lever rotates along with the door opening operation on the inside door handle, a latch unit provided between a vehicle body and a door performs release operation to allow opening movement of the door with respect to the vehicle body. A sub plate is arranged on the base plate in a form of covering the baseplate, an input support shaft for supporting the inside door handle is rotatably arranged on the sub plate, and the input lever is arranged on the input support shaft so as to integrally rotate with the input support shaft.