Robot Arm Wiring Structure with Radial Buffer
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Solution Overview
Problem
In industrial robots using a parallel link mechanism, the routing of wire-shaped bodies (cables or pipes) inside the arm members often results in abnormal noise due to these components hitting the inner circumferential surface of the arm members during high-speed operations and rapid direction changes.
Innovation Solution
A wiring structure featuring a pair of hollow arm members with a regulating member, such as a buffer material made of foamed resin, is introduced to prevent displacement of the wire-shaped body in the radial direction, ensuring it does not contact the inner surface of the arm members, thereby preventing noise. This structure includes a pair of arm members with a first and second end section, where the wire-shaped body is introduced and led out, and a buffer material is placed in the intermediate region to regulate displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the wire-shaped body is routed inside the hollow arm member, then hygiene is improved and cable exposure is prevented, but abnormal noise occurs due to the cable hitting the inner circumferential surface during high-speed operations
Solution Approach 1:
A buffer material is introduced as an intermediary component between the wire-shaped body and the inner circumferential surface of the hollow arm member. This buffer material prevents direct contact between the cable and the arm member inner surface, thereby eliminating the abnormal noise caused by impact during high-speed operations while maintaining the hygiene benefits of routing the cable inside the arm member.
2Ease of operation
If the cable is routed with margin to avoid interference, then movement freedom is improved, but the cable may contact the inner circumferential surface causing abnormal noise
Solution Approach 1:
The buffer material serves as a mediator that allows the wire-shaped body to move freely within the hollow arm member without directly contacting the inner circumferential surface. This enables sufficient movement margin and operational freedom while preventing the cable from hitting the arm member inner surface during rapid direction changes.
3Object-generated harmful factors
If the wire-shaped body is fixed rigidly to prevent displacement, then noise is prevented, but the cable cannot accommodate high-speed movements and rapid direction changes
Solution Approach 1:
The buffer material is configured as a flexible component that can deform and accommodate the movements of the wire-shaped body during high-speed operations and rapid direction changes. This flexibility allows the robot to operate at high speeds while the buffer material continuously prevents the cable from contacting the inner circumferential surface, thus eliminating abnormal noise.
4Object-generated harmful factors
If a regulating member is added to prevent cable displacement, then abnormal noise is prevented, but device complexity increases
Solution Approach 1:
The buffer material is implemented as a simple flexible component that can be easily installed within the hollow arm member. This straightforward design prevents abnormal noise by regulating cable displacement without significantly increasing the complexity of the wiring structure, maintaining ease of assembly and maintenance.
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 prevents abnormal noise by regulating the displacement of the wire-shaped body within the arm members, ensuring smooth operation and hygiene, particularly in applications involving food products, while being cost-effective and adaptable to size changes.
Implementation Method 1
a buffer material, which regulates a displacement of the wire-shaped body in a radial direction of the arm member
Data Source
AI summary
A wiring structure for a robot arm includes a pair of arm members that each have a hollow shaft shape including a first end section and a second end section, and that are arranged to be parallel to each other. A wire-shaped body is introduced into the arm member from the first end section and led out of the arm member through the second end section so as to penetrate at least one of the pair of arm members in an axis direction of the arm member. A regulating member is provided at least in an intermediate region of the arm member in the longitudinal direction to regulate a displacement of the wire-shaped body within the arm member in a radial direction of the arm member.