Rotary Axis Cable Wiring Structure for Industrial Robots
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Solution Overview
Problem
Conventional industrial robots face challenges in passing multiple cables through small-diameter hollow pipes due to high filling degrees, leading to complex and time-consuming assembly processes with low reliability in ensuring proper cable disposition.
Innovation Solution
A rotary axis cable wiring structure that includes a cylindrical rotary axis part with cable bundles bundled by members with an outer diameter smaller than the pipe's inner diameter, using first and second cable fixing means to secure the cables, allowing for parallel arrangement and twisting within defined angles, ensuring proper cable passage and fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple cables are bundled together with a cable clamp to pass through a hollow pipe, then the number of cables that can be routed is increased, but the assembly process becomes more complex and time-consuming due to difficulty in checking cable arrangement
Solution Approach 1:
The cable bundle is segmented into multiple individual cables that are routed separately through the hollow pipe rather than as a single bundled unit. This segmentation allows each cable to be independently managed and checked during assembly, reducing the complexity of verifying cable arrangement while still achieving high cable density through the pipe.
2Volume of stationary object
If cables are passed through a small-diameter hollow pipe with high filling degree, then the space utilization is improved, but the reliability of proper cable disposition decreases due to difficulty in checking cable arrangement
Solution Approach 1:
The cables are preliminarily arranged in a specific order before being passed through the hollow pipe. This preliminary arrangement ensures that the cables maintain their designated positions during the routing process, enabling reliable cable disposition even in high-density configurations where visual checking during assembly is difficult.
3Volume of moving object
If the hollow pipe has a small diameter to reduce robot size, then the robot compactness is improved, but the ability to pass cable bundles through the pipe deteriorates
Solution Approach 1:
Instead of attempting to pass a pre-bundled cable assembly through the small-diameter pipe, the invention transitions to routing individual cables through the pipe. This dimensional change from bundle-level to cable-level routing enables effective cable passage through compact pipe diameters while maintaining the ability to properly install and check each cable.
Data Source
AI summary
To provide a rotary axis cable wiring structure and a robot having higher usability at the time of assembly and increased reliability as to whether or not cables are properly disposed. A rotary axis cable wiring structure includes a fixed member and a movable member which are rotatable relatively, a cylindrical hollow pipe member disposed between the fixed member and the movable member so as to be rotatable with respect to the movable member, a plurality of cable bundles passed from one of the fixed member and the movable member to the other through the hollow pipe member, first cable fixing means for fixing the cable bundles to the fixed member, and second cable fixing means for fixing the cable bundles to the movable member. Each of the cable bundles includes a plurality of cables, and a cable bundling member having an outer diameter smaller than an inner diameter of the hollow pipe member and bundling the plurality of cables in a state where mutual relative arrangement is maintained.