Dual-Shaft Synchronous Movement Device Using Threaded Link Unit
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Solution Overview
Problem
Conventional dual-shaft synchronous movement devices face challenges such as complex assembly, wear of locating sections, delayed kinetic energy transmission, and increased load on wires or transmission belts, leading to reduced operational stability and increased manufacturing costs, particularly in miniaturized electronic devices.
Innovation Solution
A dual-shaft synchronous movement device utilizing a threaded driver and reactor with a link unit formed by semicircular main bodies with inner threads, allowing for synchronous rotation of the first and second shafts without gears or gaskets, thereby minimizing space and improving assembly ease and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pivot pin structures with multiple gaskets, frictional plates and springs are used, then the rotary shaft can be rotated and located, but the structure becomes complicated and difficult to assemble
Solution Approach 1:
The invention divides the synchronous movement device into two independent shafts (first shaft and second shaft) with separate drive mechanisms. Each shaft has its own driver and reactor components, allowing independent assembly and maintenance while achieving synchronized movement through the link unit connection.
Solution Approach 2:
Instead of using conventional approaches with multiple gaskets, frictional plates and springs for rotation and location, the invention inverts the approach by using a link unit with connecting pieces that mechanically couple the two shafts. The synchronization is achieved through the geometric constraint of the link unit rather than through friction or elastic deformation.
2Speed
If conventional wires or transmission belts with rollers are used for force transmission, then the rotary shaft can be rotated, but kinetic energy transmission is delayed and the structure occupies large space
Solution Approach 1:
The link unit serves as an intermediary mechanical connector between the first and second shafts. It directly transmits force and motion through rigid connecting pieces without the need for flexible wires, transmission belts, or rollers, eliminating gaps and slip that cause kinetic energy transmission delays.
Solution Approach 2:
The invention replaces the flexible wire or belt-based transmission system with a rigid mechanical link unit. This substitution eliminates the elastic deformation and gap-related delays inherent in wire/belt systems, providing direct and immediate force transmission between shafts.
3Force
If wires or transmission belts are tensioned during assembling, then force transmission can be achieved, but quality control becomes difficult and assembling time increases
Solution Approach 1:
The link unit is pre-designed with fixed geometric dimensions and rigid connecting pieces that inherently provide the necessary force transmission capability. No additional tensioning action is required during assembly - the rigid structure itself ensures proper force transmission from the moment of installation, eliminating the time-consuming tensioning process.
Solution Approach 2:
The rigid link unit structure automatically maintains proper force transmission without requiring external tensioning or adjustment during assembly. The geometric constraint and rigid connection pieces self-maintain the force transmission capability, eliminating the need for operator intervention to tension wires or belts.
4Volume of stationary object
If threaded driver and reactor with link unit are used, then synchronous rotation is achieved with minimal space, but the mechanism requires precise thread engagement
Solution Approach 1:
The invention merges the driver and reactor functions into a unified link unit structure with integrating pieces that engage both shafts simultaneously. The connecting pieces of the link unit integrate the thread engagement mechanisms, ensuring that both shafts are synchronized through a single coordinated action rather than separate engagement processes.
Solution Approach 2:
The thread profiles on the driver and reactor are designed with complementary curved geometries that guide the integrating pieces of the link unit into proper engagement. The curved thread surfaces facilitate smooth engagement and maintain precise alignment during rotation, reducing sensitivity to manufacturing tolerances.
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 device achieves enhanced operational stability and reduced space occupation, enabling 360° rotation of display and apparatus body modules, improving assembly efficiency, and meeting lightweight and slimmed design requirements for electronic devices.
Implementation Method 1
A dual-shaft synchronous movement device utilizing a threaded driver and reactor with a link unit formed by semicircular main bodies with inner threads
Data Source
AI summary
A synchronous movement device applied to dual-shaft system includes a first shaft and a second shaft, which are assembled with each other and synchronously rotatable. The synchronous movement device further includes a driver disposed on the first shaft and a reactor disposed on the second shaft and a link unit connected between the driver and the reactor. When the first shaft drives the driver to rotate, the driver pushes the link unit to move along the first and second shafts to forcedly push the reactor to rotate in a direction reverse to the moving direction of the driver. Accordingly, the first and second shafts are synchronously rotated.