High-Load Toothed Belt Structure for Compact Installation Space
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Solution Overview
Problem
Existing toothed belts lack specific design parameters for enhancing load-bearing capacity suitable for heavy transport applications while maintaining belt width, with insufficient disclosure on belt strength, tooth structure, and core wire arrangements in prior art.
Innovation Solution
A toothed belt design featuring plural core wires arranged in the belt width direction, with a back portion and teeth molded integrally of thermoplastic elastomer, having a belt strength of at least 1.85 kN/mm, tooth pitch of 20 mm or more, tooth height of 5 mm or more, and back portion thickness of 4 mm or more, utilizing steel cords or aramid/carbon fiber cords for increased strength and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the overall size of the toothed belt is increased to increase load-bearing capacity, then the load-bearing capacity is improved, but the machine installation space increases
Solution Approach 1:
The patent applies local quality by concentrating reinforcement in specific areas - the back portion thickness is increased to 4 mm or more and tooth height to 5 mm or more, while maintaining standard belt width. This localized thickening provides enhanced load-bearing capacity exactly where needed (in the load-transmission regions) without increasing the overall belt width that would consume more installation space.
Solution Approach 2:
The patent uses composite construction by integrating multiple core wires (made of steel cords, aramid fibers, or carbon fibers) within the thermoplastic elastomer matrix of the back portion. This composite structure achieves superior strength-to-width ratio, allowing the belt to maintain standard width while gaining load-bearing capacity through the high-strength core wire reinforcement.
2Area of stationary object
If the belt width is kept constant to reduce machine installation space, then the installation space is reduced, but the load-bearing capacity decreases
Solution Approach 1:
The patent changes critical parameters - back portion thickness to 4 mm or more, tooth height to 5 mm or more, and core wire specifications (strength 7-8 kN, diameter 2.3-2.6 mm) - to achieve higher load-bearing capacity within the same belt width. These parameter adjustments enable the belt to carry heavier loads without increasing width, thus maintaining compact installation space.
Solution Approach 2:
The patent shifts the strength-enhancement approach from the width dimension to the thickness and height dimensions. By increasing back portion thickness and tooth height while keeping belt width constant, the patent achieves higher load-bearing capacity through dimensional optimization in the thickness and height directions, effectively moving the solution to another dimensional space.
3Strength
If core wires are arranged densely in the belt width direction to increase load-bearing capacity, then the load-bearing capacity is improved, but the device complexity increases
Solution Approach 1:
The patent applies partial action by placing core wires only in the back portion region where they are most needed for load-bearing, rather than distributing them throughout the entire belt. The core wires are positioned with specific pitch (3.0-3.7 mm) and interval (0.4-1.4 mm) in the back portion, providing sufficient reinforcement without the complexity of dense arrangement across the whole belt structure.
Data Source
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AI summary
Provided is a toothed belt comprising: a belt body that includes a plurality of core wires that each extend in a belt longitudinal direction and that are aligned in a belt width direction; a back surface part in which the plurality of core wires are embedded; and a plurality of teeth that oppose the back surface in a belt thickness direction and that are arranged spaced apart from each other in the belt longitudinal direction. The back surface part and the plurality of teeth being integrally molded using a thermoplastic elastomer. The toothed belt is characterized in that: a belt strength per 1 mm of belt width is at least 1.85 kN; a pitch of the plurality of teeth is at least 20 mm; the height of each of the plurality of teeth is at least 5 mm; and the thickness of the back surface part is at least 4 mm.