Roller Chain Lubrication with Mechanically Synchronized Piston Pump

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Solution Overview

Problem

Existing lubrication systems for roller chains are complex, require automation units and electrical connections, and are not easily adaptable to different types and speeds of roller chains, making them costly and difficult to install.

Innovation Solution

A lubrication system comprising a piston pump with a lubricant reservoir and synchronization means that mechanically mesh with the roller chain, allowing for precise and timely lubricant delivery without the need for electrical connections or complex automation, using a piston pump that synchronizes with the roller chain's motion to deliver lubricant efficiently.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If centralized lubrication systems with automation units and electrical connections are used, then lubrication precision and reliability are improved, but device complexity and installation difficulty increase

Engineering Contradiction:
Improvelubrication reliabilityVSAvoidsystem complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The invention extracts and eliminates the complex automation units, electrical connections, and control systems from traditional centralized lubrication systems. By using a mechanically actuated piston pump driven directly by roller chain motion, the system achieves reliable lubrication delivery without requiring electrical infrastructure or complex control electronics, thus maintaining reliability while dramatically reducing system complexity.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The lubrication system is designed to be self-actuating, where the piston pump is mechanically driven by the roller chain's own motion through engagement with chain links or sprockets. This self-service mechanism eliminates the need for external power sources, control systems, and electrical connections, achieving both high reliability through direct mechanical coupling and low complexity through autonomous operation.

Inventive Principle:
Principle #25Self-service

2Device complexity

If manual lubrication during regular maintenance is performed, then system simplicity is maintained, but productivity and service life are reduced

Engineering Contradiction:
Improvesystem simplicityVSAvoidconveying productivity
Core Design Contradiction:
Device complexityVSProductivity

Solution Approach 1:

The invention implements continuous lubrication delivery through an automatically actuated piston pump that operates continuously as the roller chain moves. This eliminates the discontinuous, periodic nature of manual lubrication, ensuring that lubricant is delivered continuously to friction points, thereby maintaining system simplicity while significantly improving productivity and extending service life through consistent lubrication protection.

Inventive Principle:
Principle #20Continuity of useful action

3Object-affected harmful factors

If access to roller chain is restricted for safety reasons, then operator safety is improved, but ease of operation for manual lubrication deteriorates

Engineering Contradiction:
Improveoperator safetyVSAvoidlubrication accessibility
Core Design Contradiction:
Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The lubrication system performs self-lubrication through an automatically actuated piston pump that draws lubricant from a remote reservoir and delivers it to the roller chain without requiring operator access to the chain area. This eliminates the safety hazard of manual intervention while maintaining ease of operation, as the system autonomously services itself in the restricted access zone.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The invention introduces an intermediary lubrication delivery mechanism (piston pump with applicator) that bridges the gap between the remote lubricant reservoir and the roller chain in the restricted zone. This intermediary system enables lubrication delivery without direct operator contact with the hazardous area, improving safety while maintaining operational effectiveness.

Inventive Principle:
Principle #24Intermediary (Mediator)

4Adaptability or versatility

If lubrication system must adapt to different roller chain types and speeds, then versatility is improved, but device complexity increases

Engineering Contradiction:
Improvechain adaptabilityVSAvoidsystem adaptability complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The invention employs a dynamically adaptable piston pump mechanism where the pump actuation frequency and lubricant delivery rate automatically adjust according to the roller chain's speed and type. The pump is mechanically coupled to the chain motion, so it naturally synchronizes its operation with varying chain speeds without requiring complex control systems, sensors, or variable speed drives, thus achieving high versatility with minimal added complexity.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The lubrication system is designed with universal applicability to different roller chain types and speeds through a standardized piston pump mechanism that can be configured for various applications. The mechanically actuated design inherently adapts to different operating conditions, and the system can serve multiple chain types without requiring complex reconfiguration, achieving multi-functionality without proportionally increasing complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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

The system provides cost-effective, precise lubrication that is adaptable to various roller chain types and speeds, reducing maintenance needs and ensuring efficient lubrication without manual intervention, while being easy to install and operate.

Implementation Method 1

at least one piston pump having a piston body defining a piston cavity for the displacement of a piston

Methodology Applied
Scientific EffectPiston displacement: Pump

Implementation Method 2

synchronization means having engaging means dedicated to mechanically mesh with roller chain in motion, and actuating means fastened in motion with the synchronization means, the actuating means being in constant mechanical cooperation with a portion of the piston of piston pump

Methodology Applied
Scientific EffectMechanical meshing: Gear

Data Source

PatentUS11021331B2Lubrication system for roller chain, and conveying assembly equipped with such lubrication system
Publication Date: 2021.06.01 AB SKF SKF PATENT DEPARTMENT
  • US11021331B2 patent drawing
  • US11021331B2 patent drawing
  • US11021331B2 patent drawing

AI summary

A lubrication system for a roller chain. The lubrication system provides a lubricant reservoir, at least one piston pump, and synchronization means. The synchronization means has engaging means dedicated to mechanically mesh with roller chain in motion, and actuating means fastened in motion with the synchronization means the actuating means being in constant mechanical cooperation with a piston pump.