Mobile Shredder Electric Drive System On-Site Document Processing
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Solution Overview
Problem
Central document shredding services face challenges such as the need for secure custody, documentation, and user verification, which can lead to unease among customers, and are impractical for large volumes of documents, prompting a demand for on-site shredding solutions.
Innovation Solution
A mobile shredder system comprising a truck with a rotary shredder driven by an electric motor, powered by an AC generator system, which allows for on-site shredding of documents and materials, eliminating the need for complex hydraulic drives and enabling operation from an external power source, thereby improving efficiency and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If central document shredding services are used, then documents can be shredded securely, but the complexity of custody chain management and lack of user verification increase operational burden and reduce user trust
Solution Approach 1:
The mobile shredder enables the customer to perform the shredding operation themselves at their own location, eliminating the need for the service provider to manage custody chains. The customer loads documents into the mobile shredder unit, operates it, and verifies the shredding process directly, making the system self-service oriented and removing the complexity of centralized custody management.
Solution Approach 2:
The mobile shredder unit acts as an intermediary between the customer and the shredding process. Instead of documents traveling through a centralized facility with complex custody chains, the shredding capability is brought to the customer's location, simplifying the entire process while maintaining security through direct customer verification.
2Ease of operation
If mobile shredders with hydraulic drives are used, then on-site shredding capability is achieved, but the complexity of hydraulic systems increases device complexity and maintenance requirements
Solution Approach 1:
The patent replaces the complex hydraulic drive system with an electric motor-driven system. The electric motor directly powers the shredder mechanism, eliminating the need for hydraulic pumps, valves, and fluid systems. This substitution reduces device complexity, lowers maintenance requirements, and improves reliability while maintaining the on-site shredding capability.
3Productivity
If large-volume document shredding is performed at central facilities, then high productivity is achieved, but the loss of time for document pickup and transport reduces overall efficiency
Solution Approach 1:
The mobile shredder is positioned at the customer's location before the shredding process begins. Documents are loaded directly into the mobile unit at the source, eliminating the time-consuming steps of pickup, transport to a central facility, and unloading. The shredding operation starts immediately at the customer's premises, performing the preliminary action of loading documents before the actual shredding occurs.
Solution Approach 2:
The shredding service is segmented from the centralized facility model and distributed to individual customer locations through mobile units. This segmentation allows shredding operations to occur at multiple locations simultaneously, reducing the time loss associated with consolidating all documents at a single central facility for pickup and transport.
4Ease of operation
If personal-sized shredders are used for small document volumes, then ease of operation is improved, but the productivity is insufficient for large-volume shredding requirements
Solution Approach 1:
The mobile shredder unit is designed with multi-functionality to handle both small and large document volumes effectively. It incorporates features suitable for ease of operation by customers while maintaining the capacity to process large volumes of documents. The system can operate in different modes or configurations to adapt to varying shredding requirements, making it universally applicable from small to large-volume tasks.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The mobile shredder system provides a secure, efficient, and practical solution for large-volume document shredding on-site, ensuring secure custody and verification, and reducing operational complexity by using electric motors and AC generators, enhancing user trust and operational convenience.
Implementation Method 1
an AC generator system driven by the prime mover for generating the electrical power that powers the electric motor
Implementation Method 2
an electric motor disposed outside the engine/transmission compartment and having an output shaft. The output shaft of the electric motor is mechanically coupled to the input shaft of the rotary shredder
Data Source
AI summary
A mobile shredder comprises a truck having an enclosure providing a storage volume for storage of shredded material, and a rotary shredder mounted in the enclosure outside the storage volume. A prime mover is disposed in an engine/transmission compartment of the truck. An electric motor is disposed outside the engine/transmission compartment and has an output shaft mechanically coupled to an input shaft of the rotary shredder. The rotary shredder is driven solely by the electric motor. An AC generator disposed outside the engine/transmission compartment is driven by the prime mover to generate the electrical power that powers the electric motor. The AC generator is configured to have a rated power output of about 90 to 180 kVA. The rotary shredder is configured to have a shredding capacity of 3000 to 6000 pounds per hour of typical mixed office waste when continuously operated at a nominal rated speed.