Robot Wrist Mounting Bracket with Gradient Coupling for Cable Routing
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Solution Overview
Problem
Existing linear object guide devices for industrial robots require significant bending of linear objects, such as cables and pipes, when passing through the wrist leading end to the end effector, which can lead to reduced durability and increased complexity in mounting and dismounting, especially when multiple objects are involved.
Innovation Solution
A mounting bracket with a first flange on the robot's wrist leading end and a second flange on the end effector, connected by a cylindrical coupling part with strategically designed opening parts that allow the linear object to pass through with a larger bending radius, reducing the need for extensive bending and enhancing workability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the linear object passes through a conventional coupling part with the same outer diameter, then the structure is simple, but the linear object requires significant bending which reduces durability
Solution Approach 1:
The coupling part employs different outer diameters at different positions: a first outer diameter at the first flange end and a second outer diameter at the second flange end. This local variation in geometry allows the coupling part to provide different bending radii for linear objects passing through different regions, thereby improving durability without requiring a completely complex overall structure.
Solution Approach 2:
The patent introduces dimensional variation by making the coupling part's outer diameter change along its axial length. This dimensional change creates different bending paths for linear objects, allowing them to pass through with reduced bending stress. The gradient in outer diameter provides a gradual transition that eases the bending requirement.
2Ease of operation
If the linear object is bent significantly to pass through the coupling part, then the coupling part structure remains simple, but the bending increases stress concentration and reduces workability
Solution Approach 1:
The coupling part employs different outer diameters at different positions: a first outer diameter at the first flange end and a second outer diameter at the second flange end. This local variation in geometry allows the coupling part to provide different bending radii for linear objects passing through different regions, thereby improving durability without requiring a completely complex overall structure.
Solution Approach 2:
The patent introduces dimensional variation by making the coupling part's outer diameter change along its axial length. This dimensional change creates different bending paths for linear objects, allowing them to pass through with reduced bending stress. The gradient in outer diameter provides a gradual transition that eases the bending requirement.
3Ease of operation
If multiple linear objects need to pass through the wrist leading end, then the mounting structure should accommodate multiple objects, but conventional designs increase complexity and reduce ease of installation
Solution Approach 1:
The coupling part is designed with a universal structure that can accommodate multiple linear objects simultaneously. The gradient outer diameter design creates multiple potential passage paths, and the first and second flanges provide mounting surfaces that can handle multiple objects. This multi-functional design allows several linear objects to pass through without requiring separate complex mounting structures for each object.
Solution Approach 2:
The mounting bracket is divided into distinct segments: the first flange, the coupling part, and the second flange. This segmentation allows each component to perform its specific function independently while working together as a unified system. The first flange provides the initial mounting interface, the coupling part provides the gradient transition zone, and the second flange provides the final mounting interface, making the overall system easier to install and remove.
Data Source
AI summary
A mounting bracket includes: a first flange mounted on a wrist leading end surface of a robot allowing a linear object to penetrate therethrough along a rotation center axis of a wrist leading end, the first flange having a first through-hole through which the linear object passes; a second flange that is spaced apart from the first flange in a direction of the rotation center axis and on which an end effector is mounted; and a cylindrical coupling part coupling an outer edge of the first flange and an outer edge of the second flange, the coupling part is provided with opening parts through which the linear object penetrated through the first through-hole passes, and at least at positions of the opening parts, the outer edge of the second flange is disposed in a position closer to the rotation center axis than the outer edge of the first flange.