Screen Crusher Blade Piece Holder With Ridge-Bulge Form Locking
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Solution Overview
Problem
Existing blade pieces and holders in screen crushers face issues with durability and replaceability due to high cutting forces directed to locking elements, leading to increased servicing needs and downtimes.
Innovation Solution
The blade piece features a channel-like section on its frame portion with a ridge, and the holder has a bulge on its arm portions, forming a form locking mechanism to reduce stress on the locking element, along with beveled edges for easier replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If flat opposite surfaces with a hole are used in the blade piece frame portion and holder arm portions, then the structure is simple and easy to manufacture, but relatively great cutting forces are directed to the locking element, reducing durability and increasing servicing needs
Solution Approach 1:
The invention applies local quality by creating a channel-like section with a ridge in the blade piece frame portion and a corresponding bulge in the holder arm portion. These localized structural modifications concentrate the cutting forces onto the ridge-bulge contact surfaces rather than distributing them to the locking element. This allows the majority of the structure to remain simple and easy to manufacture while only requiring localized changes at critical force-bearing points.
2Ease of operation
If flat opposite surfaces with a hole are used in the blade piece frame portion and holder arm portions, then the locking element can securely hold the blade piece, but the blade piece has poor replaceability due to high loads on the locking element
Solution Approach 1:
The invention extracts the force-bearing function from the locking element by introducing a separate ridge-bulge form locking mechanism. The ridge on the blade piece frame portion engages with the bulge on the holder arm portion to bear the cutting forces, while the locking element is removed from the force transmission path and only needs to perform its primary function of retaining the blade piece in position. This separation of functions reduces the loads on the locking element and improves replaceability.
3Loss of time
If high cutting forces are directed to the locking element, then the blade piece is securely locked in the holder, but servicing needs increase and downtimes are extended
Solution Approach 1:
The invention segments the locking and force-bearing functions into separate structural elements. The ridge-bulge form locking mechanism handles the cutting forces independently, while the locking element only performs retention. This segmentation allows the blade piece to be replaced by simply removing the locking element without having to overcome high forces, significantly reducing servicing time and downtime.
Data Source
AI summary
The invention relates to a replaceable blade piece of a working cylinder of a screen crusher. A blade piece—has a frame portion and a blade portion, the longitudinally opposite front surfaces of which form work surfaces. The frame portion has a through hole extending in the longitudinal direction of the blade portion. A channel-like section is formed on opposite sides of the frame portion containing the hole and extends in the vertical direction of a frame portion, between the edge areas of the side with the hole. The invention further relates to a replaceable blade piece holder having a U-shaped frame portion including arm portions, through which extends a longitudinal hole of the frame portion, and a bottom portion. On the opposite surfaces of the arm portions, onto their middle area is formed a bulge, which extends in the vertical direction of the arm portion.