Variable Rear Spoiler Linkage for Semi-Open State Control
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Solution Overview
Problem
Conventional link devices for variable rear spoilers lack control over semi-open states, leading to increased motor load, reduced fuel efficiency, and limited adjustability of withdrawal angle, resulting in high component count, weight, and cost, as well as low load dispersion and durability.
Innovation Solution
A dual linkage system comprising an outer and inner linkage that controls the rear spoiler's withdrawal height and angle, allowing for two-stage operation (semi-open and fully open) without continuous motor power, reducing component count and weight, and distributing torque and external forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single linkage system is used to control the rear spoiler, then the structure is simple, but the spoiler cannot be controlled in semi-open state and requires continuous motor power
Solution Approach 1:
The single linkage system is divided into two separate linkage systems: a first linkage system that controls the withdrawal height of the spoiler bracket, and a second linkage system that controls the withdrawal angle of the rotary variable rear spoiler. This segmentation allows independent control of height and angle, enabling semi-open state control without continuous motor power.
2Strength
If the intermediate link is added to support the rotary link in fully open state, then the load support is improved, but the number of components and weight increase
Solution Approach 1:
The first linkage system is designed to dynamically support the second linkage system when the spoiler is in the fully open state. The outer link of the first linkage system can bear the load of the rotary link, eliminating the need for a separate intermediate link while maintaining load support capability.
3Strength
If the thickness of links is increased to reinforce durability, then the strength is improved, but the weight and cost increase
Solution Approach 1:
The linkage system is segmented into two independent systems, allowing the load to be distributed across multiple links in each system. This load dispersion enables the use of thinner, lighter links while maintaining overall system durability and strength.
4Device complexity
If a single linkage system is used, then the structure is simple, but the torque and external force are concentrated causing low load dispersion
Solution Approach 1:
The single linkage system is segmented into two independent linkage systems that work together. The first linkage system handles withdrawal height control while the second handles withdrawal angle control, dispersing the torque and external forces across multiple links and improving load dispersion and reliability.
5Ease of operation
If the dual linkage system is implemented, then the semi-open state control is achieved, but the device complexity increases
Solution Approach 1:
The two linkage systems are merged into a coordinated system where the first linkage system controls withdrawal height and the second controls withdrawal angle. Both systems share common components like the drive shaft and motor, reducing the overall complexity increase while achieving semi-open state control capability.
Data Source
AI summary
A link apparatus of a variable rear spoiler for a vehicle, may include an outer linkage coupled to a motorized rotating drive shaft, a base bracket affixed to a vehicle body and a spoiler bracket connected to a rear spoiler, wherein the outer linkage determines a withdrawal height of the rear spoiler at a fully open state of the rear spoiler, and an inner linkage positioned inside of the outer linkage and coupled to the drive shaft, the base bracket, and the spoiler bracket, wherein the inner linkage determines a withdrawal angle of the rear spoiler at the fully open state of the rear spoiler.