Pivoting Pusher Shredder Compartment Design
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Solution Overview
Problem
Conventional shredding devices face issues with space efficiency and operational reliability due to soiling of guides and sealing problems in pusher devices, especially when handling waste products of lower density or large size, which impede the shredding process and increase space requirements.
Innovation Solution
A pivoting pusher device fully integrated within the material charging compartment of the shredding device, driven by a shaft that remains inside the compartment, ensuring the pusher remains enclosed and avoids contact with external guides or apertures, allowing efficient material pressing without interference from waste products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a draw-type pusher with guide rails is used, then the material can be pressed towards the rotor, but the guide rails become soiled and interfere with proper shredding operation
Solution Approach 1:
The invention removes the guide rails and external support structures from the system. The pusher is designed to pivot freely within the charging compartment without requiring external guides, thereby eliminating the source of soiling and operational interference while maintaining the pushing function
Solution Approach 2:
The pusher is segmented into a pusher surface and a pivot axis, allowing it to rotate independently within the charging compartment. This segmentation enables the pusher to function without external guide rails, as each component operates independently within the enclosed space
2Ease of operation
If a pusher device is installed pivotable outside the charging space, then the pushing function is achieved, but the space requirement increases and sealing becomes problematical
Solution Approach 1:
The pusher device is nested completely within the charging compartment, with the pivot axis and pusher surface both contained inside the hopper space. This nesting eliminates the need for external installation space and avoids sealing problems at aperture edges, as the entire mechanism operates within the enclosed charging volume
3Ease of manufacture
If the pusher is passed through an aperture in the hopper wall, then the pusher can be installed, but waste products gain access to the aperture edges and hinder the pushing process
Solution Approach 1:
The invention extracts the pusher mechanism from the hopper wall aperture configuration and relocates it entirely within the charging compartment. By eliminating the aperture passage, waste products cannot access the pusher mechanism, preventing interference with the pushing process
Solution Approach 2:
The pusher is segmented with its pivot axis positioned inside the charging compartment rather than passing through the hopper wall. This segmentation allows the pusher to be driven by a shaft extending through the wall while keeping the critical pusher surface and pivot point isolated from waste product contamination
Data Source
AI summary
The present invention relates to a shredding device for shredding material, comprising a material charging compartment in which the material to be shredded can be loaded; a rotor; and a pusher device having a pusher and a drive device for the pusher, wherein the pusher is pivotable about an axis such that it presses the material to be shredded towards the rotor, and wherein the pusher remains completely within the material charging compartment during operation.