Robot Cable Bundle Guide Unit Wear Reduction

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Solution Overview

Problem

Existing robot systems face challenges in prolonging the lifespan of cable bundles due to wear and maintenance issues caused by interference and contact with mechanical components, leading to increased operational costs.

Innovation Solution

A robot design incorporating a swivel unit, lower arm, and a cable bundle support mechanism with a guide unit, slide rails, and self-lubricating materials to securely manage and protect cable bundles, preventing interference with joint axes and reducing wear.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If cable bundles are arranged on the side surface of the lower arm to extend along the longitudinal direction, then the cable bundles are protected from interference with joint axes, but wear and maintenance issues still occur due to contact with mechanical components

Engineering Contradiction:
Improvecable bundle lifespanVSAvoidwear and contact damage
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

A guide unit is introduced as an intermediary component between the cable bundles and the mechanical environment. The guide unit includes a guide hole through which the cable bundles pass, and this guide hole is positioned to avoid interference with the rotation of the joint axis. The guide unit acts as a mediator that protects the cable bundles from direct contact with mechanical components while still allowing necessary movements.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The cable bundle protection system is segmented into multiple components: the guide unit with guide holes, the lower arm structure, and the cable bundles themselves. By dividing the system into these segments, the patent isolates the cable bundles from harmful mechanical contact while maintaining functional connectivity. The guide unit is a separate component that specifically addresses the protection need without interfering with the overall robot mechanics.

Inventive Principle:
Principle #1Segmentation

2Duration of action of stationary object

If a cable bundle support mechanism with guide unit is implemented, then wear is reduced and maintenance needs decrease, but device complexity increases

Engineering Contradiction:
Improvecable bundle lifespanVSAvoidcable management structure
Core Design Contradiction:
Duration of action of stationary objectVSDevice complexity

Solution Approach 1:

The guide unit serves multiple functions simultaneously: it guides and supports the cable bundles, protects them from mechanical contact and wear, and allows for necessary movements during robot operation. By combining these functions into a single component, the patent reduces overall device complexity while still achieving comprehensive cable protection.

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

Solution Approach 2:

The guide unit can be designed as a thin-walled structure or shell that provides protection without adding significant complexity. The guide holes through the guide unit create a simple yet effective barrier that protects cable bundles from contact with mechanical components while maintaining structural integrity and allowing movement.

Inventive Principle:
Principle #30Flexible shells and thin films

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 solution effectively prolongs the lifespan of cable bundles by minimizing wear and maintenance needs, reducing operational costs through enhanced cable management and protection.

Implementation Method 1

a cable bundle support mechanism including a guide unit for supporting the first and second cable bundles to move in the longitudinal direction of the lower arm

Methodology Applied
Scientific EffectFriction reduction through self-lubricating materials: Lubrication

Data Source

PatentUS9138902B2Robot
Publication Date: 2015.09.22 YASKAWA DENKI KK
  • US9138902B2 patent drawing
  • US9138902B2 patent drawing
  • US9138902B2 patent drawing

AI summary

A robot includes a base; a swivel unit rotatably arranged on the base; a lower arm having a base end portion, a tip end portion and a side surface, the base end portion rotatably supported on the swivel unit to enable the lower arm to swing in a front-rear direction; and first and second cable bundles arranged on the side surface of the lower arm to extend along a longitudinal direction of the lower arm. The robot further includes a cable bundle support mechanism including a guide unit for supporting the first and second cable bundles to move in the longitudinal direction of the lower arm.