Blade Support Disc Segmentation for Agricultural Rotors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing devices for attaching blades to rotating shafts in agricultural machines, such as rejuvenator-scarifiers, are limited in the number of blades that can be securely fastened, making it difficult to create efficient blade support discs.
Innovation Solution
The device features rings with multiple cutouts on their side faces to accommodate radially extending blade support feet, allowing for the assembly of blade segments into a disc configuration, with each segment having internal support feet that nest into the ring impressions, enabling a higher number of blades to be securely attached circumferentially.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple blade segments are attached to rings on a rotating shaft, then the number of blades that can be securely fastened is increased, but the device complexity increases
Solution Approach 1:
The blade assembly is divided into multiple independent blade segments that can be separately attached to the rings. Each segment has its own support feet that nest into impressions on the ring, allowing multiple blades to be mounted without creating a single complex assembly. This segmentation enables the number of blades to be increased while maintaining manageable complexity through modular design.
Solution Approach 2:
The blade segments utilize a nesting mechanism where the support feet of each segment nest into corresponding impressions or cavities on the ring structure. This nesting arrangement allows multiple blade segments to be compactly arranged around the ring, increasing the number of blades that can be attached while maintaining a compact overall structure and reducing device complexity.
2Quantity of substance
If blade segments are nested into ring impressions, then the number of blades that can be attached circumferentially is increased, but the manufacturing precision requirements increase
Solution Approach 1:
The nesting mechanism provides self-aligning features where the support feet of blade segments fit into corresponding impressions on the ring. This geometric interlocking provides natural alignment during assembly, reducing the need for high-precision machining while still achieving accurate circumferential positioning of multiple blades.
Solution Approach 2:
The impressions on the ring and support feet on blade segments are designed with specific local geometric features that provide precise local positioning. These localized features ensure accurate alignment at each attachment point without requiring the entire ring and blade assembly to be manufactured with uniformly high precision, thereby enabling multiple blades to be attached with manageable manufacturing tolerances.
3Reliability
If rings are tightened axially against each other, then the blades are securely locked in their impressions, but the ease of operation for blade replacement decreases
Solution Approach 1:
The blade assembly is segmented into independent blade segments that can be accessed and replaced individually. The axial tightening mechanism secures the entire ring assembly, but the segmented design allows operators to loosen the rings slightly and withdraw individual blade segments from their impressions without affecting other blades, maintaining ease of operation while ensuring secure retention during normal operation.
Solution Approach 2:
The axial tightening mechanism provides dynamic adjustment capability, allowing the rings to be tightened securely for reliable blade retention during operation, and slightly loosened when blade replacement is needed. This dynamic adjustment of the tightening force enables the system to switch between secure retention mode and maintenance mode, balancing reliability with ease of operation.
Data Source
AI summary
A device for attaching blades to rings which are integrally connected to a rotating shaft for an agricultural machine. Each ring has several cutouts which can receive, by nesting support feet of flat segments, each segment bearing one or several blades, for mounting the segments to the ring adjacent to each other in a circumferential direction and for configuring the segments into a blade support disc.