Crusher Concave Lug Clamping for Easier Installation and Removal
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Solution Overview
Problem
Existing cone and gyratory crushers face challenges with complex and unreliable fastening mechanisms for concaves, making installation and removal difficult and prone to damage.
Innovation Solution
A concave design featuring radially projecting fastening lugs with spacer areas and a crusher head with corresponding supports and passages allows for simple and secure clamping and unclamping, using clamping elements that can be easily inserted and removed laterally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a segmented clamping ring connection is used to attach the concave to the crusher head, then the concave can be securely fastened, but the installation becomes difficult and requires a large number of parts
Solution Approach 1:
The clamping connection is segmented into discrete fastening lugs on the concave and corresponding supports on the crusher head, allowing for simplified assembly compared to a continuous segmented clamping ring. Each lug acts as an independent clamping point that can be engaged with simple clamping elements.
Solution Approach 2:
The fastening lugs are integrated directly into the concave structure as a unified component, combining the clamping function with the existing concave design. This merging eliminates the need for separate clamping rings or complex fastening assemblies, reducing the total number of parts while maintaining secure attachment.
2Ease of manufacture
If threaded connections with bolt mounts are used to fasten the concave, then the concave can be attached to the crusher head, but the connection becomes susceptible to damage and secure fastening cannot be guaranteed
Solution Approach 1:
The threaded connection mechanism is extracted and replaced with a direct clamping system using fastening lugs and simple clamping elements. This removes the vulnerable threaded interfaces that are prone to damage, replacing them with a more robust mechanical clamping arrangement that distributes forces more evenly.
Solution Approach 2:
Instead of using threaded holes that require insertion and tightening (which creates vulnerable threaded interfaces), the design inverts the approach by using protruding fastening lugs that are clamped from the outside. This inversion eliminates the internal threaded connections and their associated damage susceptibility.
3Device complexity
If fastening lugs are positioned close together to simplify the concave structure, then the number of components is reduced, but the installation and removal process becomes more complex
Solution Approach 1:
The fastening lugs are strategically positioned at locations that optimize both structural simplicity and operational ease. The spacer areas between lugs are designed with clearances that facilitate the insertion and removal of clamping elements, while the lugs themselves remain close together to maintain structural efficiency. Each lug's position is optimized for its specific function in the clamping process.
Data Source
AI summary
The disclosure relates to a concave (20) of a cone crusher and/or gyratory crusher for installation inside a crusher head (30), wherein the concave (20) has a central longitudinal axis (M) extending in the longitudinal direction of the concave, wherein the concave (20) has a feed (24.1) for material to be crushed on its top (O) and a crushed material discharge area (24.2) on its opposite bottom (U), and wherein the concave (20) has a base part (21) having an outer clamping surface (28). In order to reduce the amount of parts and installation work, provision is made according to the disclosure for the base part (21) to have a support section (25) having fastening lugs (26) projecting radially outwards, wherein the fastening lugs (26) are disposed spaced apart from one another in the circumferential direction of the support section (25) by means of spacer areas, wherein at least one clearance is provided in each of the spacer areas, which clearances permit a penetration in the direction of the central longitudinal axis (M) from the bottom (U) in the direction of the top (O), and wherein the radially outward extent of the clamping surface (28) is greater, at least sectionally, than the radially outward extent of the fastening lugs (26).