Crawler Track Bridge Composite Design for Weight and Wear
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Solution Overview
Problem
Existing caterpillar tracks made of steel are too heavy, while those made of aluminum wear excessively, and tracks composed of multiple components are complex and costly to produce.
Innovation Solution
A caterpillar web with a hollow base body and side legs that enclose a cavity, allowing multiple cutting edges to be inserted and riveted, providing stability and support without tilting, and using aluminum for the base body and steel for the cutting edge to reduce weight and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the track bridge is made of steel, then strength and durability are improved, but weight increases significantly
Solution Approach 1:
The track bridge combines aluminum base body with steel cutting edges, creating a composite structure that leverages the lightweight properties of aluminum for the main body while using high-strength steel for the wear-prone cutting edges. This resolves the contradiction by distributing material selection based on functional requirements rather than using a single material throughout.
Solution Approach 2:
Different parts of the track bridge are made from different materials optimized for their specific functions: aluminum for the base body where low weight is critical, and steel for the cutting edges where high strength and wear resistance are critical. This local differentiation resolves the strength-weight contradiction by applying material properties only where needed.
2Weight of moving object
If the track bridge is made of aluminum, then weight is reduced, but wear resistance deteriorates leading to breakage
Solution Approach 1:
The composite construction uses aluminum for the base body to achieve low weight, while steel cutting edges are attached to provide the necessary wear resistance and reliability. This resolves the contradiction by combining materials with complementary properties rather than relying on aluminum alone.
Solution Approach 2:
The cutting edges, which are subject to wear and require high reliability, are made of steel and attached to the aluminum base body. This local application of high-strength material at the wear-prone interfaces resolves the reliability issue while maintaining the overall lightweight advantage of aluminum.
3Adaptability or versatility
If the track bridge uses multiple components, then adaptability and ease of repair are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The track bridge is divided into separable components: the aluminum base body and the steel cutting edges. The cutting edges can be individually replaced when worn, providing ease of repair and adaptability without requiring replacement of the entire structure. This segmentation enables modular maintenance while keeping the overall design relatively simple.
Solution Approach 2:
The base body design with standardized side legs and mounting features allows the same base body to accommodate different cutting edge configurations or replacements. This universality provides adaptability for different applications and easy replacement of worn components without increasing overall system complexity.
Data Source
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AI summary
Track bridge for a track of a tracked vehicle, in particular a track bridge for a track of a snow groomer or a track bridge for a track of a cross-country ski track groomer, wherein the track bridge can be attached transversely to the direction of travel to parallel, mutually aligned bands of the track, wherein the track bridge comprises an elongated base body, wherein the track bridge has a support element, wherein the support element is designed as a planar support on an outer side of the base body in order to arrange the track bridge with the support against the bands, wherein the base body has two side legs, wherein the two side legs are present on the base body in such a way that the elongated track bridge tapers in a cutting-edge manner on a further outer side opposite the planar support and spaced apart from the support, wherein the support element and the side legs enclose a cavity of the base body.The caterpillar bridge is characterized by the fact that one side leg has through-holes, so that a cutting edge of the caterpillar bridge is inserted into the cavity of the base body through several through-holes, the support element having a receiving element, the cutting edge being present with the end inserted into the cavity abutting the receiving element.