Robot Hand Shock Absorber Mitigates Collision Torque
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Solution Overview
Problem
Robot hands with rigid structures are prone to damage upon collision with dynamic objects and struggle to control these objects effectively due to the objects bouncing back, while flexible materials face challenges in applying force and control.
Innovation Solution
A hand structure incorporating a base, swingable finger joint portions, and a shock absorber connected between the base and finger portions to mitigate rotational torque from collisions, allowing for better control of dynamic objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid structure is used for the robot hand, then the structural strength is improved, but the hand is prone to damage upon collision with dynamic objects and the objects bounce back making control difficult
Solution Approach 1:
The patent applies the dynamics principle by introducing a shock absorber mechanism that allows the finger portion to dynamically respond to collisions. The shock absorber enables controlled movement and energy dissipation during impact events, transitioning the system from a purely rigid static structure to one with dynamic adaptation capabilities. This resolves the contradiction by maintaining structural integrity while allowing safe collision response through controlled deformation and energy absorption.
Solution Approach 2:
The patent implements beforehand cushioning by pre-installing a shock absorber mechanism in the finger portion. This cushioning element is prepared in advance to absorb impact energy during collisions with dynamic objects. The shock absorber is positioned and configured beforehand to mitigate collision forces, preventing both hand damage and object bounce-back, thus resolving the technical contradiction between structural strength and collision resistance.
2Reliability
If flexible material is used for the robot hand, then collision resistance is improved, but the ability to apply force and control objects deteriorates
Solution Approach 1:
The patent applies local quality by providing shock absorbers selectively at specific locations where collisions are most likely to occur (in the finger portion), while maintaining rigid structures in other areas for effective force application. This localized cushioning approach ensures collision resistance where needed without compromising the overall force application capability of the hand structure.
Solution Approach 2:
The shock absorber mechanism provides dynamic response only during collision events, allowing the hand to maintain its rigid force-application capability during normal operation. The dynamic element activates selectively during impacts, resolving the contradiction by ensuring flexible collision response without sacrificing steady-state force application ability.
3Reliability
If a shock absorber is added to mitigate collision impact, then collision resistance is improved, but the device complexity increases
Solution Approach 1:
The patent employs a shock absorber mechanism that functions as a flexible element within the otherwise rigid hand structure. This flexible component absorbs collision energy through controlled deformation, providing collision resistance without requiring complex active control systems or multiple mechanical parts. The simple flexible shock-absorbing element resolves the contradiction by adding minimal structural complexity while significantly improving collision resistance.
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 the robot hand to effectively control and manage dynamic objects by absorbing impact, preventing them from bouncing back and allowing for stable grasping and manipulation.
Implementation Method 1
a shock absorber that is connected between the base and the finger portion to mitigate rotational torque generated in the finger portion in response to a swing of the finger portion due to collision of a dynamic object
Data Source
AI summary
A hand according to an aspect of the present disclosure includes a base portion, a finger joint portion provided at the base portion, a finger portion swingable about the finger joint portion, and a shock absorber coupled between the base portion and the finger portion to relieve rotational torque generated in the finger portion in response to a swing of the finger portion due to collision of a dynamic object. A plurality of the finger portions is provided for one base, and the shock absorber is connected between at least one of the finger portions and the base.