Cylindrical Chain Tool with Segmented Blocking for Pin Alignment
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Solution Overview
Problem
Conventional chain tools face difficulties in aligning the chain pin with the top rod due to inadequate blocking by the blocking wall, leading to potential deformation and inefficient assembly or disassembly of bicycle chains.
Innovation Solution
A chain tool design featuring a cylindrical base body with a groove and inner thread portion, a drive bolt with a top rod and screw rod, and a grip for secure handling, ensuring the chain pin aligns with the top rod and is securely pushed without unexpected movement during assembly or disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the blocking wall height is increased to totally block the chain, then the chain positioning is improved, but the blocking wall may deform due to excessive force concentration
Solution Approach 1:
The blocking function is divided into two parts: the blocking wall provides initial positioning, while the added chain stop provides secondary blocking. This segmentation distributes the blocking force across multiple structures, preventing deformation of any single component while ensuring complete chain blocking.
Solution Approach 2:
The chain stop acts as an intermediary blocking element that works in conjunction with the blocking wall. It provides an additional barrier that prevents the chain from moving forward without requiring the blocking wall to bear excessive force alone, thus preventing deformation.
2Ease of operation
If the top rod is rotated to push the chain pin, then the chain pin can be moved, but the chain may rotate unexpectedly due to insufficient blocking
Solution Approach 1:
The blocking function is segmented between the blocking wall and the chain stop, where the blocking wall provides initial positioning and the chain stop provides complete blocking. This ensures the chain remains stable during the pushing operation without unexpected rotation.
Solution Approach 2:
The chain stop is预先 positioned to provide complete blocking before the pushing operation begins. This preliminary blocking action ensures the chain cannot rotate unexpectedly during the chain pin pushing process, maintaining stability throughout the operation.
3Manufacturing precision
If manual pressing is applied to align the chain pin with the top rod, then alignment is achieved, but the operation becomes more complex and time-consuming
Solution Approach 1:
The groove structure and blocking wall are designed to automatically guide and align the chain pin with the top rod during insertion. The chain pin self-aligns through the geometric constraints of the groove and blocking wall, eliminating the need for manual pressing or adjustment operations.
Solution Approach 2:
The groove and blocking wall are预先 configured to provide automatic alignment of the chain pin with the top rod. This preliminary alignment structure ensures proper positioning before the pushing operation begins, eliminating the need for additional manual alignment steps.
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
The design effectively prevents unexpected chain link movement and ensures the base body can bear the force required for pushing the chain pin, facilitating convenient and efficient assembly or disassembly of bicycle chains.
Implementation Method 1
an inner thread portion being formed on the side surfaces along a direction of groove depth
Data Source
AI summary
A chain tool has a base body being cylinder like and having a groove formed in an end of the base body, and two wall portions being formed and faced each other on two sides of the groove. The two wall portions have two side surfaces. An inner thread portion is formed on the side surfaces along a direction of groove depth, the base body is laterally penetrated by the groove along a center of inner thread portion, a bottom portion connects the two wall portions and having a through hole formed therein and being coaxial to the inner thread portion; a drive bolt having a top rod and a screw rod being movably engaged with the inner thread portion, wherein the screw rod has a drive portion placed against to the top rod, the top rod is coaxially align to the through hole.