Turntable Limiting Mechanism for Rotation Beyond 180°
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing turntable rotation positioning structures are complex, occupy large space, and have low reliability, especially for rotations greater than +180°, often relying on electrical limiting which poses a risk of component failure.
Innovation Solution
A limiting mechanism comprising a base, first bearing, turntable, and rocker assembly with a shifting lever, slider, and elastic member, where the shifting lever engages with the slider to push it against limiting portions, achieving mechanical limiting with few actions and a simple structure, allowing rotation beyond 180° while reducing noise through magnetic resetting.
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 greater than +180°, then positioning accuracy is improved, but device complexity increases and space occupation increases
Solution Approach 1:
The limiting mechanism is segmented into independent functional components: a limiting component with limiting surfaces, a transmission component with a transmission hole, and a positioning component. This segmentation allows each part to perform its specific function simply, avoiding the need for complex integrated structures while achieving accurate rotation positioning greater than 180°.
Solution Approach 2:
The patent extracts the essential limiting function from complex mechanical structures and implements it through a simplified geometry-based approach. The limiting surfaces and transmission hole configuration alone can achieve the positioning function without requiring additional complex mechanical limiting devices, thereby reducing overall device complexity.
2Measurement precision
If multiple mechanical limiting components are used to achieve rotation greater than +180°, then positioning capability is improved, but space occupation increases
Solution Approach 1:
The limiting function, transmission function, and positioning function are merged into a single integrated component structure. The transmission component simultaneously provides the transmission hole for motion transmission and the geometric constraints for limiting, eliminating the need for separate limiting components and reducing space occupation while maintaining positioning capability for rotation greater than 180°.
Solution Approach 2:
The transmission component is designed with multi-functionality, serving both as a motion transmission element (through the transmission hole) and as a limiting element (through its geometric configuration with limiting surfaces). This universal design reduces the number of components needed and minimizes space occupation while achieving accurate rotation positioning.
3Device complexity
If electrical limiting is used to achieve rotation positioning greater than +180°, then device complexity is reduced, but reliability decreases due to potential electrical component failure
Solution Approach 1:
The patent replaces electrical limiting mechanisms with a purely mechanical geometry-based limiting system. The limiting surfaces and transmission hole configuration provide passive mechanical constraints that are inherently reliable and do not depend on electrical components, achieving both simplicity and high reliability for rotation positioning greater than 180°.
4Measurement precision
If complex rotation positioning structures are used to achieve rotation greater than +180°, then positioning accuracy is improved, but noise increases
Solution Approach 1:
The limiting surfaces are designed with appropriate geometric shapes and orientations that provide smooth contact and gradual engagement during rotation. This beforehand geometric configuration ensures that when the limiting action occurs, it does so in a controlled manner that minimizes impact and noise, while still achieving accurate positioning for rotation greater than 180°.
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 effectively limits rotation beyond 180° with high reliability, minimal space occupation, and reduced noise, utilizing mechanical limiting with a simple structure and few actions, enhancing stability and compatibility with various turntables.
Implementation Method 1
a rocker assembly (4), wherein the rocker assembly (4) comprises a second bearing (41) fixedly connected to the base body (11), a rocker (42) inserted into the second bearing (41) and forming a fixed connection with the second bearing (41), a slider (43) sleeved on the rocker (42) to form a sliding connection with the rocker (42), an elastic member (44) connected between the rocker (42) and the slider (43)... the slider (43) stretches along an axial direction of the rocker (42) until the shifting lever (32) rotates from the initial position to greater than 180°
Implementation Method 2
the rocker assembly (4) comprises a second bearing (41) fixedly connected to the base body (11), a rocker (42) inserted into the second bearing (41) and forming a fixed connection with the second bearing (41), a slider (43) sleeved on the rocker (42) to form a sliding connection with the rocker (42)... two opposite sides of the base body (11) corresponding to the slider (43) along a circumferential direction of the base body are respectively provided with limiting portions (13) evenly spaced from the slider (43)
Data Source
AI summary
A limiting mechanism includes: a base, a first bearing, a turntable, and a rocker assembly. The base includes a base body and a through hole. The first bearing is mounted in the through hole. The turntable includes a turntable body and a shifting lever. The rocker assembly includes a second bearing, a rocker, a slider, an elastic member, a movable magnet, and a fixed magnet. Two opposite sides of the base body corresponding to the slider are respectively provided with limiting portions evenly spaced from the slider. The shifting lever is limited through the slider and the limiting portion. The limiting mechanism of the present disclosure 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.