Robot Arm Stopping Device Using Replaceable Deformable Stoppers
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Solution Overview
Problem
Existing robot mechanisms with stoppers for restricting relative movement between rotating members are inefficient and costly due to the need for complex and bulky structures that do not effectively manage collision energy.
Innovation Solution
A moving mechanism stopping device with detachable stoppers featuring a deformable part and a deformation restriction part, where the deformable part plastically deforms upon collision to absorb energy, and a rigid bolt head restricts further deformation, allowing for compact and cost-effective operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional stoppers are used to restrict relative movement between rotating members, then the stopping function is achieved, but the structure becomes complex and bulky
Solution Approach 1:
The stopper is divided into three distinct parts: a base for mounting, a deformable part for energy absorption, and a deformation restriction part for controlling deformation. This segmentation allows each part to perform its specific function efficiently, simplifying the overall structure while maintaining reliability.
Solution Approach 2:
The deformable part is designed to be replaceable after absorbing collision energy through plastic deformation. By making this critical energy-absorbing component replaceable rather than designing the entire stopper as a permanent structure, the system achieves reliable stopping functionality with simpler, more cost-effective maintenance.
2Reliability
If traditional stoppers are used to restrict relative movement between rotating members, then the stopping function is achieved, but the size and cost increase
Solution Approach 1:
The stopper utilizes plastic deformation as a parameter change mechanism to absorb collision energy. By designing the deformable part to undergo controlled plastic deformation rather than relying on bulky elastic deformation or complex mechanical mechanisms, the stopper achieves effective energy absorption in a compact form, reducing overall size while maintaining stopping reliability.
3Ease of manufacture
If the stopper structure is simplified to reduce size and cost, then manufacturing efficiency improves, but collision energy management becomes ineffective
Solution Approach 1:
The invention converts the harmful collision energy into beneficial plastic deformation of the deformable part. By designing a structure that intentionally undergoes controlled plastic deformation to absorb impact energy, the stopper efficiently manages collision energy while maintaining a simple, cost-effective design. The deformation restriction part ensures this energy conversion occurs in a controlled manner.
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 efficiently stops relative rotation between robot arms by consuming collision energy through plastic deformation, reducing size and cost by replacing only the deformable part, while maintaining reliable stopping functionality.
Implementation Method 1
a deformable part that is integrally provided on the base and that is plastically deformed by impact of collision
Data Source
AI summary
A moving mechanism stopping device includes stoppers that are respectively provided on two members relative to each other, for restricting relative movements of the members by collision of the stoppers with each other, where: the two members are arranged so as to be spaced apart from each other in a direction orthogonal to a relative movement direction; and at least one of the stoppers includes a base that is detachably fixed to one of members, a deformable part that is integrally provided on the base and that is plastically deformed by impact of collision, and a deformation restriction part that is fixed to the base so as to be spaced apart from the deformable part in the relative movement direction and that comes into contact with the plastically deformed deformable part so as to restrict further plastic deformation thereof.