Vehicle Display Panel Anti-Twist Clutch and Spring Mechanism
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Solution Overview
Problem
Vehicle display systems face issues such as display panel twisting due to minute differences in drive motor rotations, unstable unfolding angles, and noise generation from drive mechanisms, particularly in large-sized vehicles, which can lead to safety hazards and operational inefficiencies.
Innovation Solution
A vehicle display system incorporating clutch means with spring washers and high-viscosity lubrication washers to prevent connection member idling, a position detecting mechanism for restoring the display panel to its preset position, and electric motors operated at a voltage lower than their rating to reduce noise, along with windup springs to manage panel weight and facilitate folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two drive means are mounted to rotate the display panel, then the display panel can be unfolded and folded, but the display panel twists due to minute differences in rotation between the two drive motors
Solution Approach 1:
A clutch means is introduced as an intermediary mechanism between the drive means and the connection member. The clutch means includes a clutch washer with friction surfaces that engage with the connection member, allowing controlled slippage to absorb rotation differences between the two drive motors, thereby preventing display panel twisting while maintaining folding and unfolding functionality
2Ease of operation
If the coupling hole diameter of the connection member is greater than the external diameter of the rotational shaft, then the connection member can rotate freely, but the connection member runs idle causing display panel twisting
Solution Approach 1:
The clutch means acts as an intermediary between the rotational shaft and the connection member. It provides controlled friction engagement that allows necessary rotation for folding/unfolding while preventing excessive idle rotation that causes twisting, thus maintaining both rotation freedom and connection stability
3Productivity
If the display panel is unfolded, then media information can be provided to passengers, but the display panel may be lowered rapidly due to its own weight
Solution Approach 1:
A windup spring is mounted on the rotational shaft to provide an upward counterbalancing force that opposes the downward gravitational force on the display panel. The spring is wound during unfolding and stores potential energy, automatically counteracting the panel's weight to maintain position stability and prevent rapid lowering while the panel remains unfolded for information provision
4Power
If the drive means operates at rated voltage, then the drive means provides sufficient power, but noise is generated by the drive means
Solution Approach 1:
The operating voltage of the drive means is changed from the rated voltage to a lower voltage level. This parameter change reduces the power consumption and noise generation of the drive motors while still providing sufficient power for the folding and unfolding operations, trading some power output for reduced noise
5Ease of operation
If the display panel is unfolded directly in one-touch manner, then the operation is simple, but traffic accidents may result from the display panel being unfolded directly by the driver
Solution Approach 1:
The locking means is designed with dynamic control capabilities that allow different unlocking behaviors based on system state. The microcontroller can control the locking means to require multiple steps or confirmations before unlocking during driving conditions, while still allowing simple one-touch operation when safe, thus adapting the operation complexity to the operational context
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
The system effectively prevents display panel twisting, enables safe and automatic folding/unfolding, reduces noise, and ensures the display panel returns to its preset position, enhancing safety and operational stability.
Implementation Method 1
one or more clutch means, each comprising spring washers, which is configured to press a corresponding connection member in one direction
Implementation Method 2
a lubrication washer, which is configured to have high-viscosity lubricant holding grooves to adjust the frictional resistance of the corresponding connection member
Implementation Method 3
windup springs, each of which is mounted to the corresponding rotational shaft that connects the main body with the display panel and is wound when the display panel is unfolded
Data Source
AI summary
A vehicle display system having both an untwisting function and a position restoring function is provided. The vehicle display system includes a main body, a display panel, one or more drive means, a microcontroller, one or more clutch means, and windup springs. The main body is mounted on the ceiling of a vehicle. The display panel is coupled to the main body so as to be rotated. The drive means rotate two connection members connected to respective ends of the display panel. The microcontroller operates the drive means so that the display panel is unfolded when receiving basic signals. Each of the clutch means causes a corresponding connection member to run idle over a corresponding rotational shaft. Each of the windup springs is mounted to the corresponding rotational shaft and is wound when the display panel is unfolded.