Force Sensor Installed Member with Stress-Isolating Gap
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Force detecting devices, such as six-axis sensors, face challenges in accurately detecting forces applied to robots due to stress and strain on the installation face, which can lead to reduced detection accuracy and increased manufacturing costs.
Innovation Solution
A force detecting device design featuring an installed member with a plate-shaped or brim-shaped first portion, a second portion extending downward, and a third portion extending horizontally, with a gap in the top-down direction between the first and third portions, reduces stress transfer to the force sensor main unit, improving detection accuracy and moderating costs by eliminating the need for high-rigidity components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a force sensor is installed directly on a robot's end effector, then the detection accuracy is improved, but stress and strain on the installation face cause reduced detection accuracy and increased manufacturing costs
Solution Approach 1:
The installed member is divided into three distinct portions: a first portion that contacts the force sensor, a second portion extending downward, and a third portion extending horizontally to the installation face. This segmentation allows stress to be distributed across different sections, preventing stress concentration at the force sensor installation location and maintaining detection accuracy.
Solution Approach 2:
The installed member acts as an intermediary component between the force sensor and the robot's end effector installation face. By introducing this intermediate structure with its three portions, stress from the installation face is transmitted through the second and third portions rather than directly to the force sensor, eliminating the harmful stress effect while preserving measurement precision.
2Measurement precision
If high-rigidity components are used to reduce stress impact, then detection accuracy is improved, but manufacturing costs increase
Solution Approach 1:
Instead of using high-rigidity materials or components to resist stress, the invention changes the structural parameters by creating a three-port ion configuration with specific geometric relationships. The gap between the first and third portions, along with the angular relationships between the portions, allows the structure to naturally accommodate and distribute stress without requiring expensive high-rigidity materials or complex manufacturing processes.
3Measurement precision
If additional components are added to reduce stress impact, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The installed member combines multiple functional portions (first portion for sensor contact, second portion for stress transmission, third portion for installation) into a single integrated component. This merging approach eliminates the need for separate stress-distribution components or additional structural elements, reducing device complexity while maintaining the ability to protect the force sensor from stress and strain.
Data Source
AI summary
A force detecting device includes an installed member that is installed on an installing face and a force sensor main unit that is fixed to a top face of the installed member. The installed member has a plate-shaped or brim-shaped first portion having the top face and extending at least in a horizontal direction; a second portion extending at least downward from a bottom face side of the first portion; and a third portion extending at least in the horizontal direction from the second portion and fixed to the installing face, and a gap SP in a top-down direction is formed between the first portion and the third portion.