Rotary Wheel Image Board Counterweight Vibration Control
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Solution Overview
Problem
Existing image boards for rotary wheels experience rotation issues due to friction, driving wind, and inertia, leading to vibration that adversely affects the steering function of vehicles, as the main weight's eccentric position generates increased vibration.
Innovation Solution
An image board design featuring a base plate with a main weight and a compensating weight, where the compensating weight moves within a chamber to return the main weight to its original position, minimizing torque and vibration, and an expansion plate allows for increased image area and easy replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a main weight is disposed at the lower portion of the image board to maintain image position, then the image can be displayed at a fixed position, but vibration is generated due to eccentric weight change when the bearing malfunctions
Solution Approach 1:
A compensating weight is introduced that moves in opposition to the main weight's eccentric displacement. When the main weight shifts due to bearing malfunction or inertial forces, the compensating weight moves in the opposite direction to counterbalance the eccentricity, thereby eliminating vibration while preserving the image's fixed position display function
2Adaptability or versatility
If the image board is exposed to driving wind to display images, then advertising and decorative effects are achieved, but torque is generated that rotates the image board at high speeds
Solution Approach 1:
The compensating weight system counteracts the torque generated by driving wind. As the wind forces the image board to rotate, the compensating weight shifts to generate an opposing moment that balances the aerodynamic torque, allowing the image board to maintain its intended orientation despite high-speed vehicle operation
3Ease of operation
If bearing friction is reduced to allow smooth rotation, then the image board can rotate freely, but the main weight may rotate with the base plate due to inertial forces
Solution Approach 1:
The compensating weight is coupled to the main weight through a mechanism that allows relative movement. When inertial forces cause the main weight to rotate with the base plate, the compensating weight moves to counterbalance this displacement, maintaining the overall weight balance and preventing unwanted rotation of the image board
4Ease of manufacture
If a fixed image board design is used, then manufacturing is simple, but image area is limited and replacement is difficult
Solution Approach 1:
The image board is divided into a base plate (containing the weight mechanism) and a separate expansion plate (containing the image). This segmentation allows the image portion to be easily replaced or upgraded without affecting the mechanical weight-balancing system, while the base plate maintains the vibration-reduction function
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 image board maintains a fixed image position despite wheel rotation, reduces torque at high speeds, and enhances user convenience with a separable expansion plate, improving the image display and reducing vibration-related steering issues.
Implementation Method 1
a compensating weight that is disposed in the space and applies load to return the main weight to an original position by moving in the space when the main weight rotates in a predetermined direction
Implementation Method 2
a main weight that is fixed at a lower potion of the base plate and applies load to the lower portion of the base plate
Data Source
AI summary
An image board for a rotary wheel which is mounted on a rotary wheel of a vehicle and displays a stationary image regardless of the rotation of the rotary wheel, the image board including: a base plate which is uprightly arranged on the outer portion or the inside of a wheel frame provided on the rotary wheel and mounted to be independently rotatable with respect to the wheel frame, and on one side or both sides of which a predetermined image is arranged, the base plate including a chamber on which a space is formed to be extended along the circumferential direction with respect to a rotational axis; a main weight which is fixedly mounted on the bottom of the base plate and applies a load to the bottom of the base plate; and a compensation weight which moves within the space as the main weight rotates in any direction and applies a load to the main weight so that the main weight returns to the original position thereof, the compensation weight being arranged within the space.