Sprocket Groove Layout for Mud Intrusion Suppression
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Solution Overview
Problem
Existing sprockets with grooves at the base of the teeth fail to effectively prevent mud intrusion between the teeth and chain, leading to issues like chain dislodgement and abnormal wear.
Innovation Solution
A sprocket design featuring mud discharge grooves that reduce plate thickness and open into the tooth root and tip centers on the trailing side, with specific inclinations and depths to enhance mud expulsion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If grooves are formed at the base of the teeth to expel mud, then mud expulsion capability is improved, but mud can still intrude between the teeth and chain
Solution Approach 1:
The invention transitions from two-dimensional groove patterns on the tooth surface to three-dimensional grooves that penetrate through the plate thickness. This dimensional change allows mud to be expelled from both the surface and the internal structure, preventing intrusion between teeth and chain more effectively
Solution Approach 2:
The plate thickness is divided into multiple levels by forming grooves at different depths. The grooves segment the plate structure to create multiple mud discharge pathways, allowing mud to be expelled from various levels and preventing it from reaching the chain interface
2Object-generated harmful factors
If grooves are formed to reduce plate thickness, then mud discharge capability is improved, but structural strength may be reduced
Solution Approach 1:
The grooves are strategically positioned and sized to remove material only where necessary for mud discharge, while maintaining full plate thickness in load-bearing regions. This localized material removal achieves mud expulsion functionality without compromising overall structural strength
Solution Approach 2:
The groove structure creates a composite configuration where the remaining plate material and groove walls work together to maintain strength. The groove geometry is designed so that the reduced sections still provide adequate structural support while enabling mud discharge
3Reliability
If grooves open into tooth root and tip centers, then mud intrusion is suppressed, but manufacturing precision requirements increase
Solution Approach 1:
The groove pattern is designed with asymmetric positioning relative to the tooth geometry, opening into the tooth root and tip centers on the trailing side. This asymmetric configuration optimizes mud expulsion while the groove dimensions and positions are standardized to facilitate manufacturing
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 suppresses mud intrusion, preventing chain disengagement and abnormal wear by efficiently discharging mud through centrifugal force.
Implementation Method 1
efficiently discharging mud through centrifugal force
Data Source
AI summary
A sprocket capable of suppressing mud intrusion is provided. The sprocket 1 according to one embodiment is a sprocket 1, which includes a plurality of teeth and a mud discharge groove 30 that is formed to partially reduce the plate thickness and opens into the region including the tooth root center (Pbc) and the tooth tip center (Ptc) on the trailing side in the rotational direction.