Flexible Turntable Limiting Mechanism for ±180° Rotation
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Solution Overview
Problem
Current turntable rotation positioning structures are complex, occupy large space, and have low reliability, with a potential risk of electrical component failure, especially for ±180° rotation applications.
Innovation Solution
A flexible limiting mechanism comprising a base, a turntable, and a limiting assembly with a slider and elastic members, where the shifting lever on the turntable drives the limiting portion to abut against a limiting surface, enabling 180° rotation limiting with mechanical means, reducing noise and space occupation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex mechanical limiting structures (screw positioning, follow-up slider with bumper) are used to achieve rotation positioning, then positioning accuracy is improved, but device complexity and space occupation increase
Solution Approach 1:
The limiting mechanism is segmented into independent functional components: the limiting portion on the turntable, the slider on the base, and the elastic member connecting them. This segmentation allows each component to be simple in structure while collectively achieving accurate positioning at both +180° and -180° rotation points.
Solution Approach 2:
The elastic member acts as an intermediary element between the slider and the limiting portion, providing both the limiting function and the resetting function. This intermediary component enables the mechanism to achieve positioning accuracy without complex mechanical structures by using elastic deformation to transmit and reset the limiting force.
2Reliability
If complex mechanical limiting structures are used to achieve rotation positioning, then positioning reliability is improved, but space occupation increases
Solution Approach 1:
The limiting function and resetting function are merged into a single integrated mechanism. The slider and elastic member simultaneously provide both the positioning limit and the automatic reset capability, eliminating the need for separate complex mechanical structures and reducing overall space occupation while maintaining reliability.
Solution Approach 2:
The limiting assembly serves multiple functions: it limits rotation to ±180°, provides positioning accuracy, enables automatic resetting through the elastic member, and reduces noise during operation. This multi-functionality allows a compact structure to replace multiple separate components, reducing space occupation while improving reliability.
3Device complexity
If electrical limiting is used to achieve ±180° rotation positioning, then device complexity is reduced, but reliability decreases due to potential electrical component failure
Solution Approach 1:
The patent replaces electrical limiting components with a purely mechanical limiting mechanism consisting of the slider, elastic member, and limiting portion. This mechanical substitution eliminates electrical components that could fail, providing both structural simplicity and high reliability through robust mechanical contact and elastic recovery.
4Reliability
If mechanical limiting structures are used to achieve rotation positioning, then reliability is improved, but noise increases
Solution Approach 1:
The elastic member provides beforehand cushioning by absorbing impact energy when the limiting portion contacts the stopper. The elastic deformation acts as a cushion that reduces the shock and noise of the mechanical contact, while still providing reliable positioning. This prior cushioning through elastic deformation mitigates the harmful noise effect of mechanical limiting.
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 mechanism achieves reliable 180° rotation limiting with a simple structure, few actions, and minimal space usage, while the elastic members facilitate noise reduction and stability through resetting.
Implementation Method 1
two elastic members arranged along a sliding direction of the slider and respectively fixed to two ends of the slider... the limiting portion is driven to move, so that the limiting portion abuts against and the limiting portion is driven to move, so that the limiting portion abuts against the limiting surface on the corresponding side to realize limiting when the shifting lever rotates by 180°
Data Source
AI summary
A limiting mechanism is provided, including: a base; a first bearing; a turntable; and a limiting assembly. The base includes a base body and a through hole passing through the base body and having a circle shape. The first bearing is mounted in the through hole and forming a fixing connection with the base body. The turntable includes a turntable body and a shifting lever. The shifting lever rotates to the limiting portion until the limiting portion is pressed against and the limiting portion is driven to move, so that the limiting portion abuts against the limiting surface on the corresponding side to realize limiting. The limiting mechanism not only has fewer actions and has a simple structure, but also occupies a small space, has high reliability, and can reduce generation of noise.