Leaf Chain Connecting Plates Force Distribution
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Solution Overview
Problem
Conventional leaf chains experience deformation, wear, and reduced operating life due to concentrated force on outer plates and uneven contact between pins and bushings, leading to premature attrition and lubricant loss during high-loading transmission.
Innovation Solution
The leaf chain design incorporates connecting plates for balanced force distribution, pivotally connected outer plates to prevent deformation, and strategically placed washers to maintain lubrication and reduce wear, ensuring equal contact and prolonged life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If outer plates are fixed tightly on pins, then connection strength is improved, but outer plates deform and wear under high loading
Solution Approach 1:
The connection structure is segmented into inner plates, outer plates, and connecting plates. The inner plates are fixed tightly to pins for strength, while outer plates are loosely engaged to allow deformation accommodation. Connecting plates distribute loading across multiple points, preventing concentrated stress on outer plates.
Solution Approach 2:
Different parts of the chain structure have different engagement qualities: inner plates have tight engagement for strength, outer plates have loose engagement for deformation tolerance, and connecting plates provide distributed loading. This local differentiation resolves the contradiction between connection strength and wear resistance.
2Stability of the object's composition
If pins are tightly engaged with outer plates, then connection stability is improved, but pins rotate abnormally and wear under high loading
Solution Approach 1:
The pin connection system is segmented into tight engagement with inner plates for stability and loose engagement with outer plates for rotation freedom. This segmentation allows pins to maintain stable connection while avoiding abnormal rotation and wear.
Solution Approach 2:
Inner plates act as intermediaries between pins and outer plates. They provide stable engagement with pins while allowing outer plates to move freely, mediating the contradiction between connection stability and pin rotation prevention.
3Productivity
If force is concentrated on specific parts of pins, then transmission efficiency is improved, but pins and bushings wear prematurely
Solution Approach 1:
The force transmission path is segmented across multiple components: inner plates, outer plates, and connecting plates. This segmentation distributes the applied force across different contact points on the pin, preventing concentration on specific parts and reducing premature wear.
Solution Approach 2:
The loose engagement of outer plates allows dynamic adjustment of force distribution during operation. As the chain operates, the outer plates can move to distribute loading more evenly across the pin surface, preventing localized wear while maintaining transmission efficiency.
4Reliability
If washers are tightly disposed between plates, then sealing effect is improved, but washers attrite and lose lubricant
Solution Approach 1:
The sealing system is segmented with washers positioned at specific locations between inner plates and outer plates. This segmentation allows washers to provide sealing where needed while reducing their exposure to attrition from plate twisting.
Solution Approach 2:
Washers are strategically positioned at locations where sealing is most critical while minimizing their exposure to mechanical stress from plate twisting. This local optimization maintains sealing effectiveness while extending washer life.
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 enhances stability, transmissibility, and extends the operating life of the leaf chain by distributing force evenly and maintaining effective lubrication, preventing premature wear and deformation.
Implementation Method 1
The lubricant moistens a space between each pin 12 and each bushing 17 to prevent the pins 12 and the bushings 17 from being attrite and rusted during a transmitting process
Implementation Method 2
the washers 16 are disposed between the first inner plates 13,14 and provide the sealing effect by being tightly disposed to the first inner plates 13 and the outer plates 15
Data Source
AI summary
A leaf chain includes a plurality of chain units each having two pins, around which first and second alternate inner plates between outer plates are mounted. The plates form respective apertures where the pins penetrate. Each chain unit has bushings located in the apertures of the first and second inner plates, and first washers disposed between any two adjacent bushings and between the bushings and the outer plates. There are connecting plates located at an outer side of the outer plates and tightly engaged with the pins to prevent the outer plates from being deformed because of a concentration of large force in the outer plates during the transmission. The outer plates have a loose engagement with the pins to prevent the pins and inner plates from being worn away. The first washers help the sealing effect to maintain the preferable stability and transmissibility and prolong the operating life.