Robot Link Member Connection Structure with Deformation Prevention
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Solution Overview
Problem
Existing connection structures for robot link members and associated components often suffer from deformation issues due to the lack of effective prevention mechanisms when transferring forces between the link member and connected members, particularly when pipes and wires are housed within the link member.
Innovation Solution
A connection structure featuring bolts that penetrate the link member's walls, with a deformation preventing member sandwiched between the walls to absorb axial forces and prevent deformation, allowing for secure attachment of the link member to the member to be connected while maintaining the integrity of the link member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bolts are used to connect the link member with the member to be connected, then secure fastening is achieved, but deformation of the link member walls occurs due to tightening forces
Solution Approach 1:
A deformation preventing member is introduced as an intermediary element between the first and second walls of the link member. This mediator absorbs the tightening forces from the bolt, preventing direct transmission of deformation forces to the link member walls while still enabling secure fastening through the bolt connection.
Solution Approach 2:
The deformation preventing member is positioned in advance between the walls before bolt tightening. It acts as a pre-positioned cushion that anticipates and prevents the deformation that would otherwise occur during the fastening process, maintaining dimensional stability while allowing secure connection.
2Weight of moving object
If the link member is made lightweight using materials like aluminum or plastic, then cost-effective manufacturing is achieved, but resistance to deformation during force transfer is reduced
Solution Approach 1:
The connection structure creates a composite system combining the lightweight link member material (aluminum or plastic) with the deformation preventing member. This composite approach allows the use of lightweight materials while compensating for their lower deformation resistance through the added structural element that specifically addresses the weakness during force transfer.
Solution Approach 2:
Instead of making the entire link member heavier or more rigid throughout, the deformation preventing member provides localized reinforcement only at the critical connection points where bolts apply tightening forces. This maintains the overall lightweight property while providing targeted strength where needed.
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
This configuration effectively reduces deformation of the link member during force transfer, ensures secure fastening, and prevents damage to housed pipes and wires, while allowing for lightweight and cost-effective manufacturing using materials like aluminum or plastic.
Implementation Method 1
a bolt penetrating the first and second walls and including a head part that comes into contact with the second wall and a screw part that is screwed into the member to be connected
Implementation Method 2
a deformation preventing member disposed near the bolt between the first and second walls and sandwiched between the first and second walls by tightening the bolt so that the deformation preventing member prevents or reduces deformation of the first and second walls
Data Source
AI summary
A connection structure in which a robot link member including a first wall, a second wall facing the first wall with an interval, and a connecting wall connecting the first wall and the second wall is connected with a member to be connected contacting a surface of the first wall of the link member, which does not face the second wall, the connection structure includes a bolt penetrating the first and second walls and including a head part contacting the second wall and a screw part screwed into the member to be connected, and a deformation preventing member sandwiched between the first and second walls by tightening the bolt to prevent or reduce deformation of the walls in a direction in which the walls become closer to each other.