Crawler Rebar Tying Robot for Heavy-Load Mobility on Rebars

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Solution Overview

Problem

The moving performance of rebar tying robots deteriorates as their weight increases due to the use of wheels that rely on rebars as rails, leading to reduced mobility and efficiency.

Innovation Solution

The rebar tying robot employs a crawler system that moves on both first and second rebars, combined with a side stepper mechanism and a power supply configuration to maintain mobility and stability, allowing the robot to tie rebars effectively even with increased weight.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If wheels are used to move on rebars as rails, then the rebar tying robot can move along the rebars, but the moving performance deteriorates as the weight of the robot increases

Engineering Contradiction:

Improveweight of rebar tying robotVSAvoidmoving performance

Core Design Contradiction:

Weight of moving objectVSSpeed

Solution Approach 1:

The patent replaces the wheel-based mechanical system with a crawler-based system. The crawler uses tracks and rollers that distribute the robot's weight over a larger contact area with the rebars, reducing point loads and improving traction. This mechanical substitution allows the robot to maintain effective movement along the rebars even as its weight increases, directly resolving the contradiction between robot weight and moving performance

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Quantity of substance

If the weight of the rebar tying robot increases, then the robot can carry more components and tools, but the mobility and efficiency are reduced

Engineering Contradiction:

Improvecomponents and toolsVSAvoidmobility and efficiency

Core Design Contradiction:

Quantity of substanceVSProductivity

Solution Approach 1:

By replacing wheels with crawlers, the system can support increased weight from additional components and tools without proportionally losing mobility. The crawler's distributed contact and superior traction allow the robot to carry more equipment while maintaining acceptable movement efficiency along the rebar structure

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Device complexity

If wheels are used for movement, then the structure is simpler, but the moving performance degrades with increased weight

Engineering Contradiction:

Improvemovement mechanismVSAvoidmoving performance

Core Design Contradiction:

Device complexityVSSpeed

Solution Approach 1:

The patent accepts increased mechanical complexity by replacing the simpler wheel system with a crawler system. This substitution, while more complex, provides superior weight distribution and traction through tracks and rollers, enabling the robot to maintain effective moving performance even as its weight increases and it carries additional components

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS12146328B2Rebar tying robot

Publication Date: 2024.11.19 MAKITA CORP

AI summary

A rebar tying robot configured to tie a plurality of first rebars and a plurality of second rebars intersecting the plurality of first rebars at points where the plurality of first rebars and the plurality of second rebars intersect. The rebar tying robot may include a rebar tying machine, a conveying unit configured to convey the rebar tying machine, and a control unit configured to control an operation of the conveying unit. The conveying unit may include a crawler configured to move on the plurality of first rebars and the plurality of second rebars.