Modular Jaw Crusher Jaw with Detachable Rod Elements
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Solution Overview
Problem
Large jaw crushers with one-piece crushing jaws are difficult to maintain and replace due to their massive weight, requiring significant manual effort and replacing entire steel structures, despite only the active surface being worn.
Innovation Solution
A modular crushing jaw design featuring a base plate with detachable rod-shaped crushing elements that can be replaced individually, allowing for muscle-powered maintenance and using different materials for the base plate and elements, such as manganese steel and XAR400/XAR600, to form a prism or wave structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a one-piece solid crushing jaw with prismatic structure is used, then the crushing jaw surface provides effective crushing capability, but the entire jaw becomes extremely heavy (several tons) and difficult to replace manually
Solution Approach 1:
The crushing jaw is divided into two main segments: a base plate that remains on the crusher rocker and detachable crushing elements that can be independently replaced. This segmentation allows the heavy one-piece jaw to be split into a permanent heavy base and replaceable lighter elements, solving the manual replacement difficulty while maintaining crushing effectiveness.
Solution Approach 2:
The active crushing surface elements are extracted as separate detachable components from the base plate. Only the worn crushing elements need to be removed and replaced, not the entire heavy jaw assembly. This extraction principle enables manual replacement of wear components without moving the multi-ton base plate.
2Strength
If a one-piece crushing jaw is used, then structural integrity is maintained, but replacing a worn jaw requires replacing the entire steel structure even though only the active surface is worn
Solution Approach 1:
The crushing jaw system is segmented into a permanent base plate and replaceable crushing elements. The base plate maintains structural integrity and remains installed, while only the worn crushing elements are replaced. This segmentation enables selective replacement of wear components without disturbing the structural base.
Solution Approach 2:
The detachable crushing elements are designed as consumable components that are discarded when worn and replaced with new elements. The valuable base plate structure is recovered and retained for continued use, eliminating the waste of replacing entire jaw structures when only the surface is worn.
3Ease of manufacture
If a one-piece crushing jaw is used, then the jaw can be formed from a single material, but different materials cannot be used for the base plate and crushing elements to optimize performance
Solution Approach 1:
The crushing jaw is segmented into base plate and crushing elements that can be manufactured from different materials optimized for their specific functions. The base plate can use one material (e.g., manganese steel for impact resistance) while crushing elements use another material (e.g., highly wear-resistant alloy), allowing material optimization without manufacturing complexity.
Solution Approach 2:
The crushing jaw system effectively becomes a composite structure combining different materials in the base plate and crushing elements. Each component can be made from the most suitable material for its specific functional requirements, creating a multi-material assembly that optimizes both durability and performance.
4Ease of repair
If the entire crushing jaw is replaced when worn, then the crushing surface is renewed, but significant manual effort is required to move and replace the multi-ton jaw
Solution Approach 1:
The crushing jaw is segmented into a heavy permanent base plate and lighter replaceable crushing elements. This segmentation allows the renewal of the crushing surface by replacing only the elements, which are light enough for manual handling, while the base plate remains fixed on the crusher rocker.
Solution Approach 2:
The crushing elements are extracted as separate replaceable components from the base plate. When the crushing surface becomes worn, only the extracted elements need replacement, not the entire heavy jaw assembly. This extraction enables surface renewal without the need to manually move multi-ton structures.
Data Source
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AI summary
The invention relates to a crusher jaw (1) for a jaw crusher, which can be arranged, so as to be exchangeable, on a moveable crusher rocker or on a stationary frame section of said jaw crusher, the crusher jaw comprising an active crusher jaw surface by means of which crushing material to be fed into said jaw crusher can be crushed. According to the invention, the crusher jaw (1) comprises a base plate (10) for arranging on the crusher rocker or on said stationary frame section, with crusher elements (11) being detachably arranged on said base plate (10) which at least partially form the crusher jaw surface.