Spindle Clamping Mechanism for Rapid Cutting Wheel Replacement
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Solution Overview
Problem
Existing devices for cutting staple fibers struggle with quick and reliable replacement of the cutting wheel, leading to interruptions in continuous operation due to the need for manual loosening of screws and dowel pins, resulting in significant downtime during maintenance.
Innovation Solution
A spindle-based clamping device that allows axial movement to securely engage and disengage the cutting wheel from the drive shaft without requiring auxiliary energy, utilizing a spring assembly for locking and pneumatic or hydraulic means for unlocking, minimizing changeover time and reducing wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If manual loosening of screws and dowel pins is used to remove the cutting wheel, then the cutting wheel can be replaced, but the system shutdown time increases and productivity decreases
Solution Approach 1:
The cutting wheel assembly is segmented into modular components (cutting wheel, bearing bush, drive shaft) that can be independently removed and replaced. The bearing bush is designed as a separate replaceable component that simplifies the overall replacement process.
Solution Approach 2:
The bearing bush is designed with dynamic capabilities - it can rotate on the drive shaft during operation and can be axially shifted when needed. This dynamic design allows for quick release mechanisms where the bearing bush can be rotated 90 degrees to disengage from the drive shaft, enabling rapid cutting wheel replacement without full system shutdown.
2Reliability
If multiple screws and dowel pins are used to secure the cutting wheel, then the connection is reliable, but the replacement process becomes complex and time-consuming
Solution Approach 1:
The complex multi-screw and dowel pin fastening system is extracted and replaced with a simplified bearing bush mechanism. The bearing bush serves as an integrated retaining component that combines the functions of multiple fasteners into a single replaceable unit, reducing the number of individual fastening elements from multiple screws and dowel pins to one modular component.
Solution Approach 2:
The bearing bush is designed as a multi-functional component that simultaneously serves as a structural support element, a retention mechanism (replacing multiple screws and dowel pins), and a replacement interface. This universal component performs multiple functions that previously required separate fastening elements.
3Reliability
If the cutting wheel is permanently connected to the drive shaft, then the connection is secure, but the cutting wheel cannot be replaced without complex procedures
Solution Approach 1:
The connection between the cutting wheel and drive shaft is made dynamic through the bearing bush mechanism. During normal operation, the bearing bush provides secure rotational support. When replacement is needed, the bearing bush can be rotated 90 degrees to disengage from the drive shaft, transforming from a fixed secure connection to a easily removable configuration.
Solution Approach 2:
The bearing bush acts as an intermediary component between the cutting wheel and the drive shaft. It provides the secure connection during operation while enabling easy replacement through its rotational disengagement capability. The bearing bush mediates between the need for secure mounting and the need for quick replacement.
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
Enables rapid and reliable cutting wheel replacement with minimal downtime, ensuring continuous operation by eliminating the need for complex loosening procedures and rotational movements, thus maintaining system efficiency and reducing wear.
Implementation Method 1
at least one spring assembly (7) acting on the tensioning device (20} with pretension
Implementation Method 2
The axial movement of the spindle for opening the clamping device is preferably generated pneumatically, hydraulically or by an electric motor
Data Source
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AI summary
The invention relates to a device for cutting staple fibers from a bundle of endless fiber strands which are guided at least partially around a rotatable cutting wheel (2), wherein the cutting wheel (2) has a plurality of knives (3) on its circumference which interact with a pressure- or force-loaded pressure element such that the fiber strands are cut between the pressure element and the knives (3), wherein the cutting wheel (2) is coupled to a drive (9) via a shaft (10). The invention is characterized in that a spindle (4) is arranged inside the shaft (10), wherein the cutting wheel (2) is connected to the shaft (10) via a releasable clamping device (20) which can be opened or closed by an axial movement of the spindle (4).