Interchangeable Robot Finger Mount for Fast Tool Change

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Solution Overview

Problem

Existing robotic apparatuses require significant labor and time for manual setup changes, and existing solutions increase the size and weight of end effectors, leading to reduced mounting accuracy and increased vibration during tool interchange.

Innovation Solution

A robotic apparatus with a detachable interchangeable tool system featuring a robot-arm-side mount surface and an interchangeable-tool-side mount surface, utilizing a driving mechanism and opening and closing mechanism to facilitate tool interchange without the need for individual actuators, reducing the size and weight of the end effector.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If individual actuators are provided for each interchangeable tool, then the tool can be driven independently, but the manufacturing cost increases and the interchanging time increases

Engineering Contradiction:
Improvetool interchangeabilityVSAvoidinterchanging time
Core Design Contradiction:
Adaptability or versatilityVSLoss of time

Solution Approach 1:

A single actuator is designed to serve multiple interchangeable tools through a universal mounting mechanism. The actuator is positioned on the robot arm and connects to different tools via a standardized interface, allowing one actuator to drive multiple tools sequentially without requiring individual actuators for each tool.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The actuator and mounting mechanism are merged into an integrated assembly where the actuator serves both as the driving force and the mounting interface for interchangeable tools. This combination eliminates the need for separate actuators and reduces the complexity of the interchange system.

Inventive Principle:
Principle #5Merging (Combining)

2Adaptability or versatility

If the end effector includes all necessary driving sources, then each tool can be driven independently, but the size and weight of the end effector increases

Engineering Contradiction:
Improvetool driving capabilityVSAvoidend effector weight
Core Design Contradiction:
Adaptability or versatilityVSWeight of moving object

Solution Approach 1:

The actuator is extracted from the interchangeable tool and relocated to the robot arm or end effector body. This separation allows the tool to be lightweight and simple, while the driving capability is provided by the external actuator that remains with the robot system during tool changes.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

A single actuator mounted on the robot arm provides driving capability for multiple different tools through a universal interface. This eliminates the need for each tool to have its own actuator, significantly reducing the total weight of the end effector system while maintaining the ability to drive various tools.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If the end effector includes all necessary driving sources, then each tool can be driven independently, but the size of the end effector increases

Engineering Contradiction:
Improvetool driving capabilityVSAvoidend effector volume
Core Design Contradiction:
Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The actuator is extracted from the interchangeable tool and positioned on the robot arm or end effector body. This allows the tool itself to be compact and minimal in size, while the driving mechanism occupies space in the robot arm where it does not increase the tool's volume.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

A single actuator serves multiple tools through a standardized mounting interface, eliminating the need for duplicate actuators for each tool. This universal approach significantly reduces the total volume required for the end effector system while maintaining the capability to drive various tools.

Inventive Principle:
Principle #6Universality (Multi-functionality)

4Adaptability or versatility

If manual setup change is performed by an operator, then the apparatus configuration can be changed, but much labor and time is required

Engineering Contradiction:
Improvesetup change capabilityVSAvoidsetup change efficiency
Core Design Contradiction:
Adaptability or versatilityVSProductivity

Solution Approach 1:

The interchangeable tool system is designed to be self-matching with the robot arm through standardized interfaces including positioning pins and mounting holes. The tool can be automatically positioned and secured without requiring manual alignment or complex adjustment procedures, enabling rapid tool changes.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

A universal mounting interface is designed for both the robot arm and interchangeable tools, allowing any tool to be quickly attached to any robot arm configuration. This standardization enables rapid tool changes without requiring manual setup or programming for each specific tool-arm combination.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS11235475B2Robotic apparatus, interchangeable tool, and method for controlling robotic apparatus
Publication Date: 2022.02.01 CANON KK
  • US11235475B2 patent drawing
  • US11235475B2 patent drawing
  • US11235475B2 patent drawing

AI summary

An interchangeable tool including a finger of a shape suitable for various components is mechanically detachably mounted to a robot arm. This eliminates the need for seeking the origin of the actuator for each interchange. By interchanging fingers themselves, the entire end effector can be reduced in size and weight.