Centrifugal Spreader Shaft Adjustment Mechanism

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Solution Overview

Problem

Existing centrifugal fertilizer broadcasters require complex adjustment mechanisms for the throwing vanes, making it difficult to simplify the process and efficiently change the throwing blades' orientation.

Innovation Solution

A spring element is used between the hollow shaft and the adjustment shaft to allow the adjustment shaft to rotate counter to the direction of the hollow shaft, combined with a coupling element featuring a displacing coupling pin, simplifying the adjustment of the throwing vanes by limiting their free rotation and enabling easy switching between spreading modes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a complex adjustment mechanism is used for the throwing vanes, then the precision of blade orientation setting is improved, but the device complexity increases and ease of operation deteriorates

Engineering Contradiction:

Improveprecision of blade orientation settingVSAvoidcomplexity of adjustment mechanism

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent extracts the adjustment function from a complex mechanism and implements it through a simple shaft that can rotate relative to the hollow shaft. The throwing vanes are adjusted by rotating the shaft, which carries the vanes, eliminating the need for complex adjustment mechanisms while maintaining precise orientation setting capability

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of using a complex mechanism to control the position of throwing vanes, the patent inverts the approach by allowing the shaft carrying the vanes to rotate freely relative to the hollow shaft, and using the rotation itself to achieve precise angular positioning. This simplifies the adjustment mechanism while maintaining precision

Inventive Principle:

Principle #13The other way round (Inversion)

2Manufacturing precision

If a complex adjustment mechanism is used for the throwing vanes, then the precision of blade orientation setting is improved, but the ease of operation deteriorates

Engineering Contradiction:

Improveprecision of blade orientation settingVSAvoidease of changing throwing blades orientation

Core Design Contradiction:

Manufacturing precisionVSEase of operation

Solution Approach 1:

The adjustment function is extracted from a complex mechanism and implemented through simple rotational movement of the shaft. The operator can easily change the throwing blades orientation by rotating the shaft relative to the hollow shaft, making the operation simple while maintaining precise angular positioning capability

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces dynamic capability by allowing the shaft to rotate relative to the hollow shaft during operation. This enables the throwing vanes to be adjusted to different angular positions easily, improving ease of operation while maintaining precise orientation setting through controlled rotation

Inventive Principle:

Principle #15Dynamics

3Ease of operation

If the adjustment shaft is allowed to rotate freely relative to the hollow shaft, then the ease of changing throwing blades is improved, but the ability to maintain defined blade position deteriorates

Engineering Contradiction:

Improveease of changing throwing bladesVSAvoidability to maintain defined blade position

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent applies preliminary action by providing a positioning mechanism that pre-establishes specific angular positions for the shaft relative to the hollow shaft. This allows the shaft to rotate freely for easy adjustment while ensuring that when positioned, the throwing blades are reliably set at the correct predefined orientations for different spreading modes

Inventive Principle:

Principle #10Preliminary action

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 configuration simplifies the adjustment mechanism, allowing for easy changeover of throwing blades and precise setting of the vanes, facilitating transitions between normal and border spreading modes with reduced complexity and increased efficiency.

Implementation Method 1

a spring element that acts between the hollow shaft and the adjustment shaft is arranged to rotate the adjustment shaft relative to the hollow shaft, in such a way that the adjustment shaft can be rotated by the spring element against the direction of rotation of the hollow shaft relative to the hollow shaft

Methodology Applied

Scientific EffectSpring element (torsion spring): Torsion Spring

Implementation Method 2

at least one coupling element is arranged between the adjusting shaft and the hollow shaft, which releases the turning of the adjusting shaft relative to the hollow shaft and fixes the adjusting shaft relative to the hollow shaft

Methodology Applied

Scientific EffectMechanical coupling: Mechanical Fastener

Data Source

PatentEP2420124B1Centrifugal spreader

Publication Date: 2014.05.14 AMAZONEN WERKE H DREYER GMBH & CO KG

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AI summary

The centrifugal fertilizer spreader comprises a supply tank, where one or more centrifugal disks are arranged below the supply tank. The winnowing fans are adjusted by an adjusting device on the centrifugal disks, particularly in a disk place. A spring element is operated between a hollow shaft and an adjusting shaft. The adjusting shaft is rotated against a rotation direction of the hollow shaft.