Elastic Crawler Cord Layer Separation Prevention
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Solution Overview
Problem
Elastic crawlers experience distortion and cord layer separation due to entrainment on sprockets or idlers and pressure from rollers, leading to separation of embedded cord layers.
Innovation Solution
The elastic crawler design features cord layers with cords intersecting each other, where the elastic body fills non-overlapping regions to couple adjacent layers, ensuring the elastic body runs through and couples the layers more extensively than where cords overlap, adhering to specific geometric relationships to minimize separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cords are arranged in multiple layers inside the elastic crawler body, then the strength and structural integrity of the crawler are improved, but distortion and separation of cord layers occur due to entrainment on sprockets/idlers and pressure from rollers
Solution Approach 1:
The patent applies different cord arrangement patterns in different regions of the crawler body. Specifically, in regions subjected to roller pressure, the cord layers are arranged with offset patterns where cords in adjacent layers do not align, creating interlocking regions that resist separation. This local differentiation of cord arrangement quality prevents layer separation while maintaining overall structural integrity.
Solution Approach 2:
The patent uses a composite structure combining multiple cord layers with the elastic body material. The cord layers are embedded within the elastic body in a configuration where they work together as a composite system. The offset arrangement creates regions where the elastic body material bonds adjacent cord layers, forming a unified composite structure that resists distortion and separation under operational loads.
2Reliability
If the elastic body is filled into all regions including where cords overlap, then complete coverage and protection are achieved, but the cords prevent continuous elastic body formation, reducing coupling between layers
Solution Approach 1:
The patent segments the elastic body filling into different regions based on cord arrangement. In regions where cords from adjacent layers overlap, the elastic body is intentionally not filled to maintain cord accessibility and function. In regions where cords do not overlap, the elastic body is filled to create bonding zones that couple adjacent cord layers. This segmentation of filling regions optimizes both protection and inter-layer coupling.
Solution Approach 2:
The elastic body acts as an intermediary material that selectively bonds adjacent cord layers. By strategically placing the elastic body in non-overlapping regions, it serves as a bonding agent or intermediary that couples the cord layers together where needed, while leaving overlapping regions free for cord function. This intermediary approach resolves the conflict between complete coverage and effective layer coupling.
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
This design effectively suppresses the separation of cord layers, enhancing the crawler's durability and resistance to distortion forces.
Implementation Method 1
an elastic crawler body and plural cord layers. The elastic crawler body is formed by an elastic body shaped into an endless loop
Data Source
AI summary
An elastic crawler includes an elastic crawler body and plural cord layers. The elastic crawler body is shaped into an endless loop. The plural cord layers are formed by plural cords covered by the elastic body, and the plural cord layers are embedded in the elastic crawler body. Respective cords included in mutually adjacent cord layers are disposed so as to intersect each other when viewed along a thickness direction of the elastic crawler body, and in at least one pair of adjacent cord layers inside at least a partial region of the elastic crawler body, a total area of portions where the respective cords included in each layer of the adjacent cord layers overlap with each other, is smaller than a total area of portions where respective regions of each layer of the adjacent cord layers in which none of the cords are disposed overlap with each other.