Heavy-Load Toothed Belt Structure for High Strength per Width
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Solution Overview
Problem
Existing toothed belts lack specific guidance on suitable belt strength, tooth structure, and dimensions for heavy transport applications, limiting their load-bearing capacity while maintaining belt width.
Innovation Solution
A toothed belt design featuring core wires arranged in the belt width direction, with a back portion and teeth molded from thermoplastic elastomer, achieving a belt strength of at least 1.85 kN/mm, a tooth pitch of 20 mm or more, and a tooth height of 5 mm or greater, utilizing steel cords or aramid/carbon fiber cords, and a polyurethane thermoplastic elastomer for enhanced mechanical characteristics.
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 belt width increases which is not desirable for machine installation space
Solution Approach 1:
The invention applies local quality by concentrating reinforcement in specific regions - core wires are embedded only in the back portion of the belt, and teeth are designed with specific dimensional characteristics (pitch ≥20mm, height ≥5mm) to provide localized load-bearing capability. This allows the belt to achieve high load-bearing capacity without increasing overall belt width, as the reinforcement is focused where it is most needed rather than uniformly distributed.
Solution Approach 2:
The invention uses composite materials by combining thermoplastic elastomer with core wires (steel cords or fiber cords) to create a hybrid structure. The core wires provide tensile strength and load-bearing capacity, while the thermoplastic elastomer provides flexibility and structural integrity. This composite approach enables the belt to achieve high strength-to-width ratio, solving the contradiction between load-bearing capacity and belt width.
2Strength
If the tooth height is increased to increase load-bearing capacity, then the load-bearing capacity is improved, but the belt thickness increases which affects installation space
Solution Approach 1:
The invention applies parameter changes by optimizing specific dimensional parameters of the teeth - pitch is set to ≥20mm and height to ≥5mm, with the back portion thickness ≥4mm. These parameter specifications provide a balanced configuration that achieves high load-bearing capacity while controlling overall belt thickness. The standardized parameters allow the belt to meet strength requirements without excessive thickness increase.
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 manufacturing complexity increases
Solution Approach 1:
The invention applies segmentation by dividing the belt structure into distinct functional zones - the back portion containing embedded core wires, and the teeth portion with specific dimensional characteristics. The core wires themselves are segmented into discrete elements arranged at specific intervals rather than continuous dense packing. This segmentation simplifies manufacturing compared to dense continuous reinforcement, while still achieving high load-bearing capacity through strategic placement of reinforcement elements.
Data Source
AI summary
Provided is a toothed belt comprising: a belt body that includes a plurality of core wires; 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. The back surface part and the plurality of teeth are 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.