Dual-Motor Display Joint for Precise Angle Control and Vibration Damping
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Solution Overview
Problem
Existing display devices lack efficient mechanisms for adjusting angles in multiple directions with compact size and minimal power consumption, while also effectively absorbing vibrations and minimizing shake during movement.
Innovation Solution
An angle adjusting device with a joint system comprising rotating members, friction wheels, and gears, driven by dual motors, allowing for adjustable angles around two perpendicular axes, and incorporating dampers to mitigate vibrations and backlash.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a dual motor system with multiple rotating members and gears is used to enable precise angle adjustment in multiple directions, then the angle adjustment precision and versatility are improved, but the device complexity increases
Solution Approach 1:
The joint system is divided into multiple independent rotating members (first, second, third, and fourth rotating members) that can rotate independently around different axes. Each rotating member is driven by dedicated motors, allowing precise control of rotation angles in multiple directions while maintaining modularity in the system design
Solution Approach 2:
The system enables three-dimensional angle adjustment by incorporating rotation around multiple perpendicular axes (first axis and second axis). The first and second rotating members provide rotation around the first axis, while the third and fourth rotating members provide rotation around the second axis, achieving spatial orientation control in multiple dimensions
2Power
If friction wheels are used to transfer driving force between rotating members, then the mechanical transmission efficiency is improved, but the device generates more vibrations and noise
Solution Approach 1:
The friction wheels are intentionally designed to operate in a controlled slipping regime rather than perfect rolling contact. The friction between the friction wheels and connecting shafts provides the necessary torque transmission while the controlled frictional interaction absorbs vibrations and reduces noise, converting what is typically considered a source of energy loss into a beneficial vibration-damping mechanism
3Reliability
If dampers are added to reduce vibrations and backlash in the joint system, then the stability and reliability are improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
Dampers are strategically positioned at critical locations in the joint system where vibrations and shocks are most likely to occur. The dampers are pre-installed to provide immediate vibration damping and shock absorption from the start of operation, preventing the propagation of harmful vibrations through the mechanical structure before they can cause wear or instability
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
Enables precise angle adjustment of displays in various orientations with reduced vibrations and shake, utilizing a compact design and minimal power, suitable for mobile and stationary applications.
Implementation Method 1
a third friction wheel closely contacting the first friction wheel and the second friction wheel in a linkable manner
Implementation Method 2
a third gear coaxially coupled with the third friction wheel, and gear-coupled to the first gear and the second gear
Implementation Method 3
incorporating dampers to mitigate vibrations and backlash
Data Source
AI summary
An angle adjusting device for a display includes a base, a joint disposed between the base and the display. The joint changes an angle of the display. The device includes a first driving motor providing power to one side of the joint, and a second driving motor providing power to the other side of the joint. The joint includes a connecting core, and a first rotating member, a second rotating member, a third rotating member and a fourth rotating member rotatably connected to the connecting core respectively in four directions of the connecting core. The first rotating member and the second rotating member are disposed along a first axis, and the third rotating member and the fourth rotating member are disposed along a second axis perpendicular to the first axis. The third rotating member is rotated based on driving of the first driving motor, and wherein the fourth rotating member is rotated based on driving of the second driving motor.