Segmented Attachment Pin Assembly for Drilling Tool Strength
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Solution Overview
Problem
Existing attachment pin assemblies for drilling tools on operating machines, such as power shovels, do not effectively enhance the strength of the pin body, which is crucial for reliable attachment and durability.
Innovation Solution
The attachment pin assembly is designed with two pin bodies and a bolt system, where each pin body has a planar tip end and a bolt hole, allowing them to be fastened together with a bolt, enhancing the strength and stability of the assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the pin body is formed from a single member, then the structure is simple, but the strength of the pin body is insufficient
Solution Approach 1:
The pin body is divided into two separate members (first pin body and second pin body) that are fastened together with a bolt. This segmentation allows each member to be optimized independently while collectively providing enhanced strength and durability, resolving the contradiction between simplicity and strength.
2Reliability
If the pin body is formed from two members, then the strength is enhanced, but the structure becomes more complex
Solution Approach 1:
Two separate pin bodies are merged through bolt fastening to create a unified attachment structure. This combining approach enhances reliability by distributing loads across multiple members while maintaining a relatively simple overall structure through the use of standard fastening components.
3Strength
If a bolt is used to fasten the two pin bodies, then the strength and stability are enhanced, but the number of parts increases
Solution Approach 1:
The pin body assembly is segmented into two main members with a bolt fastening system. This segmentation allows for enhanced strength while keeping the number of parts manageable, as the bolt and washer components are standard, readily available parts that do not significantly increase overall complexity.
Data Source
AI summary
An attachment pin assembly includes a first pin body, a second pin body, and a bolt for fastening and fixing the first pin body and the second pin body to each other. A tip end of the first pin body is formed in a planar shape across a substantially entire area excluding a first bolt hole extending in an axial direction. A tip end of the second pin body is formed in a planar shape across a substantially entire area excluding a second bolt hole extending in the axial direction. The first pin body and the second pin body are fastened and fixed with the bolt in a state in which the planar tip ends contact each other.