Elastic Block Turntable Limiting for Quiet 180° Robot Rotation
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Solution Overview
Problem
Existing rotation positioning structures in robots are complex, occupy large space, and have poor compatibility with robot turntables, relying heavily on electrical limiting which poses reliability risks and noise issues.
Innovation Solution
An elastic block limiting mechanism with a base, first and second elastic limiting assemblies, a turntable, and a bearing, utilizing elastic blocks and springs to achieve 180° forward and reverse rotation positioning with a small footprint, effective noise reduction, and high reliability through snapped limiting mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex mechanical limiting structures (screw positioning, follow-up slider, bumper) are used to protect against abnormal rotation, then reliability is improved, but device complexity increases and space occupation increases
Solution Approach 1:
The patent extracts the limiting function from complex mechanical structures and concentrates it into a simple elastic block that can be easily positioned against the turntable flange. This eliminates the need for screw positioning, follow-up sliders, and bumpers while maintaining the protection function.
Solution Approach 2:
The patent changes the physical state of the limiting element from rigid (screws, bumpers) to elastic (spring-loaded block). This allows the limiting mechanism to be more compliant and adaptable while reducing overall system complexity and space requirements.
2Device complexity
If electrical limiting is used to achieve +180° rotation limiting, then device complexity is reduced, but reliability deteriorates due to potential electrical component failure
Solution Approach 1:
The patent segments the limiting function into two independent parts: electrical limiting for normal operation and mechanical elastic block limiting for fail-safe protection. This ensures that if electrical components fail, the mechanical limit remains functional.
Solution Approach 2:
The elastic block is pre-positioned and spring-loaded to provide immediate mechanical limitation if electrical limiting fails. This beforehand preparation ensures reliability without requiring complex additional mechanisms.
3Ease of operation
If traditional mechanical limiting structures are used, then rotation positioning is achieved, but space occupation increases and compatibility with robot turntable deteriorates
Solution Approach 1:
The patent merges the limiting block with the turntable flange structure, where the block is positioned to engage directly with the flange's limiting surface. This integration eliminates the need for separate limiting structures and reduces space occupation.
Solution Approach 2:
Instead of having the limiting mechanism extend outward from the turntable, the patent inverts the approach by having the turntable flange itself provide the limiting surface that the elastic block engages with. This reduces the overall footprint and improves compatibility.
4Reliability
If rigid mechanical limiting structures are used, then rotation limiting is achieved, but noise increases and vibration resistance deteriorates
Solution Approach 1:
The patent changes the mechanical properties of the limiting element from rigid to elastic by using a spring-loaded block. This elasticity allows the block to absorb vibrations and reduce noise while maintaining effective rotation limiting.
Solution Approach 2:
The patent converts the potential harm of rigid impact (noise and vibration) into a benefit by using the elastic block to cushion the engagement between the turntable flange and the limiting mechanism. The spring absorption transforms impact energy into elastic deformation, reducing noise and vibration.
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 provides stable and reliable 180° rotation positioning with reduced noise and space occupation, enhancing the operational performance of robot turntables by using elastic blocks and springs to restrict movement in a vibration environment.
Implementation Method 1
a first elastic member fixed to one side of the base and extending along a direction parallel to a radial direction of the through hole
Implementation Method 2
The elastic block limiting mechanism includes: a base, a first elastic limiting assembly, a second elastic limiting assembly, a turntable and a bearing
Implementation Method 3
Sides of the first sliding slope and the second sliding slope adjacent to each other is closer to the through hole than sides of the first sliding slope and the second sliding slope away from each other
Implementation Method 4
The bearing is mounted in the through hole and fixed to the base body. The turntable body is inserted into and fixed to the bearing to achieve a rotational connection with the base body
Data Source
AI summary
An elastic block limiting mechanism includes: a base, a first elastic limiting assembly, a second elastic limiting assembly, a turntable and a bearing. The first elastic limiting assembly includes a first elastic member and a first elastic block. The second elastic limiting assembly includes a second elastic member and a second elastic block. The turntable includes a ring-shaped turntable body and a shifting lever. The bearing is mounted in a through hole and fixed to the base body, the turntable body being inserted into the bearing and forming a fixation to achieve a rotational connection with the base body. Compared with the related art, the elastic block limiting mechanism of the present disclosure has a simple structure, small space occupation, good stability, effective noise reduction, and high reliability.