Welding Robot Cable Routing With Large Bending Radius
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Solution Overview
Problem
Multi-jointed welding robots face challenges in maintaining a large bending radius for routing members like welding wires and hoses without increasing the robot's size, which complicates the structure and reduces the operating range and convenience, while also risking damage and positional deviations during welding.
Innovation Solution
A multi-jointed welding robot design featuring a pivot part with an opening for routing members to exit and a guide member that curves these members outward, maintaining a large curvature radius and reducing the height of the second driving shaft, thereby preventing bending tendencies and improving weld quality and robot convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the center distance of driving shafts is widened to maintain a large bending radius of routing members, then the bending radius of routing members is increased, but the size of the robot is increased and the operating range is reduced
Solution Approach 1:
The patent utilizes the vertical dimension by increasing the height of the second driving shaft from the base installation surface. This allows routing members to achieve a larger bending radius by extending upward and then curving downward, rather than requiring increased horizontal distance between driving shafts. The pivot part is formed higher, and routing members are led out through the upper portion of the pivot part, effectively using vertical space to resolve the contradiction between bending radius and robot footprint size.
2Shape
If the height of the second driving shaft is increased to maintain a large bending radius of routing members, then the bending radius of routing members is increased, but the weight of the welding robot is increased
Solution Approach 1:
The patent employs curved routing paths for the routing members, particularly using curved hoses and cables that extend upward from the base, curve over the pivot part, and then descend to the welding torch. This curved configuration naturally provides a large bending radius without requiring excessive vertical height, thereby reducing the overall robot weight while maintaining adequate routing member curvature.
3Shape
If routing members are arranged away from the pivot part and arm to maintain a large bending radius, then the bending radius of routing members is increased, but the routing members are prone to interfere with the surroundings and be damaged
Solution Approach 1:
The patent integrates routing members within the structural framework of the robot. Cables and hoses are routed through the pivot part and along the arm structure, effectively nesting them within the robot's own volume. This protects the routing members from external damage while maintaining adequate bending radius through careful routing design that utilizes the robot's internal space and structural elements.
4Shape
If the pivot part is formed higher to maintain a large bending radius of routing members, then the bending radius of routing members is increased, but the degree of freedom of robot arrangement is reduced
Solution Approach 1:
The patent designs the routing system with flexibility in mind, using flexible hoses and cables that can adapt to different robot configurations and installation positions. The routing members are not rigidly fixed but can dynamically adjust their paths, allowing the robot to be arranged in various positions and orientations while maintaining adequate bending radius through the flexible routing design.
Data Source
AI summary
Provided is a multi-jointed welding robot that includes: a rotating part that is rotatably provided on a base that is fixed to an installation surface; and a multi-jointed arm that is coupled to the rotating part via a first driving shaft and has a plurality of arm parts. An opening is formed in the rotating part through which a routing member, which is routed inside the rotating part, is guided from part of the rotating part toward the side opposite the installation surface. A guide member guides the routing member, which has one end fixed to the opening and which is guided through the opening, toward the installation surface from the other end of the routing member while bending the routing member.