Nonconductive Idler End Bell With Grounding Groove Press Fit
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Solution Overview
Problem
End bells for belt conveyor idlers made of steel require machining and welding, increasing manufacturing time and cost, and nonconductive materials pose a risk of static electricity buildup leading to potential explosions.
Innovation Solution
An end bell made of nonconductive materials like nylon or glass-fiber-reinforced plastic, with a built-in grounding groove for a grounding wire, allowing press fit attachment and static electricity dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If steel end bells are used, then strength and durability are improved, but machining and welding are required which increases manufacturing time and cost
Solution Approach 1:
The patent changes the material parameter from steel to nonconductive material (such as polymeric material), which fundamentally alters the manufacturing process requirements. This material substitution eliminates the need for machining and welding operations while maintaining structural integrity through press-fit attachment methods.
Solution Approach 2:
The patent replaces the mechanical joining methods (machining and welding) with a press-fit attachment system. The nonconductive end bell is attached to the tube roller through interference fit or transition fit mechanisms, eliminating complex machining operations and welding processes while improving manufacturing efficiency.
2Productivity
If nonconductive materials are used for end bells, then manufacturing cost and time are reduced, but static electricity buildup and explosion risk increase
Solution Approach 1:
The patent introduces a grounding wire as an intermediary element that bridges the nonconductive end bell and the conductive tube roller. This grounding wire acts as a mediator to provide a safe path for static electricity discharge, eliminating the explosion hazard while maintaining the advantages of nonconductive material usage.
Solution Approach 2:
The patent applies local quality by creating a grounding groove at a specific location on the nonconductive end bell. This localized conductive feature (the grounding groove) allows static electricity to be safely discharged while the rest of the end bell remains nonconductive, providing the best of both worlds.
3Duration of action of stationary object
If nonconductive materials are used for end bells, then service life is extended, but static discharge and explosion risk increase
Solution Approach 1:
The grounding wire serves as a mediator that enables the nonconductive end bell to safely dissipate static electricity. This intermediary component maintains the durability advantages of nonconductive materials while eliminating safety concerns related to static discharge and potential explosions.
Solution Approach 2:
The patent converts the potentially harmful static electricity buildup into a beneficial controlled discharge mechanism. By providing a grounding groove and grounding wire, the system transforms the harmful static discharge risk into a safe, controlled electrical path to ground, thereby improving reliability while maintaining the extended service life of nonconductive materials.
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
Reduces manufacturing time and cost while providing a durable, long-lasting solution that prevents static discharge and explosions by grounding the conveyor system.
Implementation Method 1
The end bell includes a path to allow the tube roller to be grounded to the bearing, thus eliminating the risk of static electricity buildup, static discharge, and subsequent explosion
Implementation Method 2
inserting the end bell into a belt conveyor idler assembly via press fit
Data Source
AI summary
An end bell includes a housing. The housing includes a bearing seat for a bearing positioned within an inner portion of the housing and includes a grounding groove for a grounding wire positioned along an outer portion of the housing. A method for attaching an end bell to a belt conveyor idler includes inserting a grounding wire into a grounding groove of the end bell, inserting a bearing into the bearing seat, and inserting the end bell into a belt conveyor idler assembly via press fit. The end bell is made of nonconductive material.