Drive Belt Profiled Back Surface Water Drainage
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Solution Overview
Problem
Existing power-transmitting drive belts experience reduced transmission performance and increased wear when operating in damp or wet conditions, particularly due to inadequate power transfer over the smooth back surface, which is exacerbated by previous solutions that either compromise rubber contact or increase production complexity and cost.
Innovation Solution
The drive belt features water-repellent profile grooves on its back surface, aligned longitudinally with a depth of 0.2-0.7 mm, occupying 5-30% of the surface, and a length-to-width ratio greater than 10, designed to maintain contact and prevent slipping, combined with a Shore hardness of 75-100 and made from ethylene-propylene-diene rubber, along with a molding process using a structured sleeve for groove formation during vulcanization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a groove pattern is created on the back surface to improve water drainage, then power transmission in wet conditions improves, but rubber contact area decreases leading to reduced transmission performance and abrasion resistance
Solution Approach 1:
The back surface is designed with localized grooves occupying only 5-30% of the total surface area, creating water drainage channels in specific regions while preserving rubber contact in other regions. This local differentiation allows simultaneous achievement of water drainage capability and sufficient friction for power transmission.
Solution Approach 2:
The groove depth is optimized to 0.2-0.7mm and the groove pattern is designed with specific dimensional parameters to achieve effective water drainage while minimizing contact area reduction. The grooves are not too deep to prevent belt splitting but sufficient to drain water effectively.
2Reliability
If ribs are formed on the back of the belt to improve transmission performance, then power transmission improves, but manufacturing complexity and cost increase significantly
Solution Approach 1:
Instead of adding protruding ribs to the belt back surface, the invention uses recessed grooves to achieve water drainage and transmission improvement. This inverted approach simplifies manufacturing compared to rib formation while maintaining effective water management and friction characteristics.
Solution Approach 2:
The groove pattern can be directly formed during the vulcanization molding process using a structured sleeve, making it a cost-effective solution compared to secondary machining operations or complex multi-step manufacturing processes required for ribbed designs.
3Productivity
If deeper grooves are used to improve water drainage, then water discharge capability improves, but the belt may split during operation
Solution Approach 1:
The groove depth is precisely controlled within the range of 0.2-0.7mm, which is sufficient to drain water effectively but not so deep as to compromise the structural integrity of the belt. This parameter optimization balances water drainage capability with belt strength.
4Productivity
If the grooves occupy larger surface area to improve water drainage, then water discharge improves, but contact area decreases reducing power transmission
Solution Approach 1:
The groove pattern is designed to occupy 5-30% of the back surface area, creating water drainage functionality in localized regions while preserving sufficient rubber contact area in other regions for effective power transmission through friction.
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 enables high torque transmission with minimal slip and wear, even in damp conditions, while being cost-effective and easy to manufacture, with reduced waste and enabling complex shapes through the molding process.
Implementation Method 1
water-repellent profile grooves on its back surface
Implementation Method 2
water-discharging profile grooves
Implementation Method 3
power transmission across the belt back
Implementation Method 4
drive belt made of elastomer material with embedded tension members
Implementation Method 5
embedded tension members
Data Source
Figure 1~2
AI summary
Power-transmitting drive belt with embedded tension members, a drive side which may be profiled and designed for power transmission to complementarily shaped pulleys and a substantially smooth back opposite the drive side, the back being formed with water-discharging profile grooves which are essentially aligned in the longitudinal direction of the drive belt.