Robot Joint Shaft Brake With Interlocking Wings for Precise Stops
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional braking devices for robot articulations suffer from slip during braking operations, leading to inaccurate regulation of stopping force, which is not suitable for precise control in robot applications.
Innovation Solution
A braking device for a driving shaft featuring a brake ring with cross-shaped locking pieces, rotatable brake wings with locking protrusions, position regulators using solenoids, and elastic members to apply forces, allowing for bi-directional braking with precise control by moving the locking protrusions between interference and non-interference positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a frictional type brake pad is used for braking operation, then the braking device can be simple in structure, but slip occurs during braking and stopping force cannot be regulated accurately
Solution Approach 1:
The brake ring is divided into multiple segments with locking pieces, and the brake wing is divided into separate locking protrusions. This segmentation allows precise control of stopping force through selective engagement of locking pieces, eliminating slip while maintaining structural simplicity.
Solution Approach 2:
The patent replaces the frictional mechanical contact system with a mechanical interlocking system using locking pieces and locking protrusions. This substitution eliminates slip by creating direct mechanical engagement instead of relying on friction, achieving accurate stopping force regulation.
2Adaptability or versatility
If locking protrusions are positioned inside the rotation radius of locking pieces, then the driving shaft can stop rotating, but the braking device cannot achieve bi-directional braking
Solution Approach 1:
The locking pieces are designed with asymmetric cross-shaped ends that can engage with locking protrusions from either direction. This asymmetry allows the same locking mechanism to effectively brake in both clockwise and counter-clockwise rotations, achieving bi-directional braking while maintaining reliability.
Solution Approach 2:
The locking pieces with cross-shaped ends serve multiple functions: they can be engaged by locking protrusions from either direction to provide braking, and their geometry allows consistent engagement regardless of rotation direction. This multi-functionality enables bi-directional braking without compromising braking effectiveness.
3Measurement precision
If conventional frictional brake pads are used, then the braking device can work with large gaps, but slip occurs and precise position maintenance is not achieved
Solution Approach 1:
The patent replaces the friction-based mechanical system with a positive engagement mechanical system using locking pieces and locking protrusions. This substitution allows the brake to function effectively with small gaps since the locking mechanism requires minimal clearance for engagement, while achieving precise position maintenance without slip.
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 accurate and bi-directional braking with small gaps, ensuring the driving shaft can be stopped and maintained at precise positions, enhancing the braking performance for robot articulations.
Implementation Method 1
elastic members adapted to apply elastic forces to the brake wings rotating
Implementation Method 2
the position regulators have solenoids adapted to rotate the brake wings according to existence or non-existence of input current or direction of the input current
Data Source
AI summary
Provided is a braking device for a driving shaft, and the braking device includes: a brake ring coupled to the driving shaft in such a manner as to rotate according to rotation of the driving shaft and having one or more locking pieces with cross-shaped ends; a support frame fixed to an interior of a robot articulation; brake wings rotatable around brake shafts formed on the support frame and having locking protrusions adapted to stop the rotation of the driving shaft through physical interference with the cross-shaped ends of the locking pieces of the brake ring; position regulators adapted to rotate the brake wings to allow positions of the locking protrusions to be moved; and elastic members adapted to apply elastic forces to the brake wings rotating.