Vehicle Shutter Fin Uniform Cross-Section Mold Reduction
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Solution Overview
Problem
The manufacturing cost of shutter devices for vehicles is high due to the need for different metal molds for various vehicle types, as the fins required for different vehicles have different sizes and shapes.
Innovation Solution
A shutter device with fins of uniform sectional shape, where the rotary shaft unit is provided independently and can be positioned at different intervals, allowing for fins of varying lengths to be cut from a single long member, reducing the need for multiple molds and enhancing manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different metal molds are prepared for fins of different sizes and shapes according to vehicle type, then the shutter device can be customized for each vehicle, but the manufacturing cost increases
Solution Approach 1:
The patent applies universality by designing a standardized fin structure with uniform cross-sectional shape that can be produced using a single mold. The fin is configured with a rotating shaft unit that allows it to be installed on different vehicle types (passenger cars, trucks, buses) despite size variations, making one mold serve multiple vehicle applications.
Solution Approach 2:
The fin is segmented into a standardized body portion with uniform cross-section and a variable length portion. This segmentation allows the core structure to remain mold-standardized while adapting to different vehicle requirements through length variation alone, reducing the need for complete mold redesigns.
2Manufacturing precision
If fins are formed by integral molding of resin with specific sizes and shapes, then the fins can meet vehicle-specific requirements, but multiple metal molds are required increasing manufacturing complexity
Solution Approach 1:
A single metal mold is designed to produce fins with a standardized cross-sectional shape that can be used across multiple vehicle types. The mold creates a universal fin body that maintains manufacturing precision through standardized geometry while accommodating different vehicle requirements through length variations and rotational positioning.
Solution Approach 2:
The fin design separates invariant parameters (cross-sectional shape, thickness, material properties) from variable parameters (length, rotation angle, position). This parameter separation allows precise control of critical dimensions through the mold while allowing non-critical dimensions to vary according to vehicle type without requiring mold changes.
3Device complexity
If the rotary shaft unit is molded integrally with the fin, then the structure is simplified, but the opening ratio is reduced due to the rotary shaft unit extending in the first direction
Solution Approach 1:
The rotary shaft unit is extracted from the fin body as a separate component rather than being molded integrally. This separation allows the fin to have a streamlined shape that maximizes the opening ratio when rotated, while the rotary shaft unit is positioned minimally in the flow direction to reduce its impact on the opening area.
Solution Approach 2:
The rotary shaft unit is oriented perpendicular to the first direction (flow direction) rather than extending along it. This dimensional reorientation allows the fin to rotate more effectively in the opening/closing motion while minimizing the rotary shaft's projection into the airflow path, thereby maintaining a higher opening ratio.
Data Source
AI summary
The present invention provides a shutter device for a vehicle in which a manufacturing cost is reduced.Provided is a shutter device (1) for a vehicle, which has: a frame member (10) that has an opening provided therein and is mounted on the vehicle; a fin (20) that extends in a first direction; and a rotary shaft unit (40) that pivotably supports the fin (20) on the frame member to be pivotable in the opening of the frame (10). The fin (20) is provided integrally with or independently from the rotary shaft unit (40), and the fin (20) has a uniform sectional shape in the first direction.