Brake Hose Braid Patterns for Shaking Durability
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Solution Overview
Problem
Existing brake hoses lack durability against shaking movements and exhibit high expansion when pressurized, failing to meet the requirements for both mechanical stress resistance and low expansion performance.
Innovation Solution
A rubber hose design featuring an inner rubber layer with a hollow part, a first braided layer using vinylon fibers in a three-over, three-under pattern, a middle rubber layer, and a second braided layer using vinylon fibers from a wet process in a two-over, two-under pattern, with outer and inner rubber layers made of EPDM, minimizing expansion and maintaining durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a brake hose uses conventional braided layers with standard vinylon fibers, then the manufacturing cost is reduced and ease of manufacture is improved, but the durability against shaking movement is insufficient and expansion performance is poor
Solution Approach 1:
The patent applies parameter changes by specifying different braid patterns (three-over three-under for the first braided layer, two-over two-under for the second braided layer) and different vinylon fiber types (dry process vs. wet process) to optimize both durability and expansion performance while maintaining manufacturing feasibility
Solution Approach 2:
The patent uses composite materials by combining different types of vinylon fibers (dry process and wet process) in different braided layers, creating a multi-layer composite structure that achieves both high durability against shaking and low expansion performance
2Reliability
If a brake hose uses conventional braided layers, then the manufacturing process is simpler, but the expansion quantity under pressure is too large
Solution Approach 1:
The patent changes the braid pattern parameters (three-over three-under and two-over two-under) and fiber processing parameters (dry vs. wet process) to control the mechanical properties of the braided layers, achieving low expansion under pressure while maintaining a manageable structural complexity
Solution Approach 2:
The patent segments the braided reinforcement into two distinct layers with different braid patterns and fiber types, allowing each layer to perform its specific function: the first layer primarily resists expansion while the second layer provides durability against shaking movements
3Reliability
If a brake hose uses conventional single-layer braided structure, then the device complexity is reduced, but the durability against mechanical stresses is insufficient
Solution Approach 1:
The patent divides the braided reinforcement into two separate layers, each with specific braid patterns and fiber types optimized for different mechanical stress conditions, thereby achieving high durability against bending, steering changes, and shaking movements
Solution Approach 2:
The patent creates a composite braided structure using different vinylon fiber types (dry process and wet process) in different layers, where each material contributes specific properties that collectively enhance durability against various mechanical stresses
Data Source
AI summary
A method of making a rubber hose includes the steps of providing an inner rubber layer including a hollow part, and forming a first braided layer on the inner rubber layer by braiding a plurality of first yarn materials including a vinylon fiber made by a dry process such that the braided first yarn materials includes a braid formed in a three-over, three-under pattern. Next, a middle rubber layer is formed on the first braided layer. A second braided layer is then formed on the middle rubber layer by braiding a plurality of second yarn materials including a vinylon fiber made by a wet process such that the braided second yarn materials includes a braid formed in a two-over, two-under pattern. Finally, an outer rubber layer is formed on the second braided layer.