Segmented Reinforced Transmission Belt for Higher Tensile Strength

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Solution Overview

Problem

Conventional transmission belts have limited strength due to the binding force between the belt body and reinforcing cords, which are configured to form an incomplete loop, restricting their operational efficiency.

Innovation Solution

A transmission belt design featuring a belt body with embedded mounting axles and a reinforcing unit composed of winding and connecting segments that form loops around the axles, along with a connecting unit that securely interconnects the belt ends, enhancing strength and allowing easy assembly and disassembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If reinforcing cords are configured to form an incomplete loop, then the belt body can be simplified in structure, but the transmission belt's strength is limited by the binding force among the belt body and the reinforcing cords

Engineering Contradiction:
Improvestructure of belt bodyVSAvoidtransmission belt strength
Core Design Contradiction:
Device complexityVSStrength

Solution Approach 1:

The reinforcing cord is segmented into multiple sections with winding segments that form incomplete loops around individual pulleys and connecting segments that link these winding segments. This segmentation allows the reinforcing cord to be integrated with the belt body in a modular fashion, reducing structural complexity while maintaining strength through distributed reinforcement points along the belt length.

Inventive Principle:
Principle #1Segmentation

2Ease of operation

If conventional connecting methods are used to interconnect belt ends, then the belt can be assembled, but the assembly and disassembly processes are complex and time-consuming

Engineering Contradiction:
Improveassembly and disassembly easeVSAvoidassembly and disassembly time
Core Design Contradiction:
Ease of operationVSLoss of time

Solution Approach 1:

The connecting pin is extracted as a separate, removable component from the belt structure. The belt ends are designed with connecting holes that can independently receive and retain the connecting pin, allowing the pin to be easily inserted or removed to assemble or disassemble the belt loop without complex tools or procedures.

Inventive Principle:
Principle #2Taking out (Extraction)

3Ease of operation

If reinforcing cords bear about 80 percent of the tension, then the belt body can be made more flexible, but the overall strength is still limited by the binding force among components

Engineering Contradiction:
Improvebelt flexibilityVSAvoidoverall belt strength
Core Design Contradiction:
Ease of operationVSStrength

Solution Approach 1:

The reinforcing cord and belt body are merged into an integrated structure where the reinforcing cord is embedded within the belt body material. The connecting segments of the reinforcing cord are embedded in the belt body, creating a unified load-bearing system that combines the flexibility of the flexible material with the strength of the reinforcing cord, eliminating the binding force limitation between separate components.

Inventive Principle:
Principle #5Merging (Combining)

Data Source

PatentEP3267070B1Transmission belt
Publication Date: 2021.01.13 KMC CHAIN INDUSTRIAL CO LTD
  • EP3267070B1 patent drawingFigure 1
  • EP3267070B1 patent drawingFigure 2
  • EP3267070B1 patent drawingFigure 3

AI summary

A transmission belt includes a belt body (2), two spaced-apart mounting axles (3) and a reinforcing unit (41). The belt body (2) forms a loop that defines an inner space (22). The mounting axles (3) and the reinforcing unit (4) are embedded in the belt body. The reinforcing unit (4) includes at least one cord that includes a plurality of winding segments (41) and a plurality of connecting segments (42). The winding segments (41) alternately extend around the mounting axles (3). Each of the connecting segments (42) interconnects a corresponding pair of the winding segments (41) that respectively extend around the mounting axles (3).