Blade Carrier With Angled Support Surfaces For Self-Centering

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Solution Overview

Problem

Existing blade bodies for comminution devices require frequent replacements due to high wear, leading to increased tool costs and complex change processes, with a suboptimal material ratio between the toothed body and blade, and high production expenses for form-fitting connections.

Innovation Solution

A blade body design featuring a toothed body with a recess for blade insertion, where the support body is positioned close to the cutting line, and additional angled bearing surfaces for self-centering, reducing material usage and simplifying blade changes through a tongue-and-groove configuration and screw connection, allowing for easier attachment and detachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a form-fitting positive locking connection is implemented between the blade and toothed body, then the blade attachment security is improved, but the manufacturing complexity and costs increase

Engineering Contradiction:
Improveblade attachment securityVSAvoidpositive locking structure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The positive locking connection is segmented into two independent components: a tongue element on the blade and a corresponding recess element on the toothed body. This segmentation allows each component to be manufactured separately using standard processes, reducing overall manufacturing complexity while maintaining secure attachment through the interlocking geometry of the tongue-recess pair.

Inventive Principle:
Principle #1Segmentation

2Reliability

If the toothed body and blade have complex corresponding shapes for positive locking, then the locking reliability is improved, but the material usage increases

Engineering Contradiction:
Improvelocking reliabilityVSAvoidmaterial usage
Core Design Contradiction:
ReliabilityVSLoss of substance

Solution Approach 1:

The corresponding shapes for positive locking are localized to specific regions on the blade and toothed body rather than requiring complex overall geometries. The tongue and recess elements are positioned only where needed for secure attachment, allowing the majority of the blade and toothed body to maintain simple, material-efficient shapes while still achieving reliable locking through the localized interlocking features.

Inventive Principle:
Principle #3Local quality

3Reliability

If frequent blade changes are required due to high wear, then the cutting performance is maintained, but the operational time loss increases

Engineering Contradiction:
Improvecutting performanceVSAvoidblade change time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The blade and toothed body are designed with dynamic adaptability through the tongue-recess positive locking system, which allows for quick engagement and disengagement. This dynamic design enables rapid blade replacement while maintaining secure attachment during operation, thus minimizing operational time loss during blade changes while preserving cutting performance through consistent blade-to-toothed body connection.

Inventive Principle:
Principle #15Dynamics

4Reliability

If the support body is positioned close to the cutting line, then the blade support is improved, but the risk of interference with the cutting operation increases

Engineering Contradiction:
Improveblade supportVSAvoidinterference with cutting
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The support body is positioned asymmetrically relative to the cutting line, with its geometry specifically configured to provide maximum support to the blade while maintaining sufficient clearance from the cutting operation. The asymmetric design allows the support body to be close to the cutting line for enhanced blade support without creating harmful interference, as the support body's shape and position are optimized to avoid contact with the cutting zone while still providing necessary structural support.

Inventive Principle:
Principle #4Asymmetry

Data Source

PatentEP2593233B1Blade carrier for comminution devices
Publication Date: 2020.04.08 LIG GMBH
  • EP2593233B1 patent drawingFigure 1a~1d
  • EP2593233B1 patent drawingFigure 2a~2e

AI summary

The invention relates to a blade carrier for comminution devices, that consists of a tooth element (1) which can be fixed on a comminution roller or similar, and at least one blade (2) which can be arranged on the tooth element (1) with a first form-fitting connection, a blade holder (3) designed as a recess (4) being provided, in said tooth element (1), as a first form-fitting connection and into which the blade (2) can be at least partially introduced, the tooth element (1) and the blade (2) having a form corresponding to one another at least on the connection side(s), and at least one further form-fitting connection being provided in the recess (3) or the blade holder (4) and on the blade (2). The invention is characterised in that one part of the tooth element (1) is designed as a support element (5), in that at least one part of the further form-fitting connection is provided on a support element (5), and in that one part of the further form-fitting connection on the support element (5) additionally extends over support surfaces (5/3, 5/4) there which run at an angle.