Direct-Drive Strip Reel With Axial Rotor for Compact Torque Transmission
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Solution Overview
Problem
Conventional reels for winding or unwinding strip-shaped materials require significant space and are individually manufactured for specific applications, making them costly and inefficient.
Innovation Solution
A reel design featuring a torque motor or synchronous motor with an axially displaceable rotor, eliminating the need for a gearbox and allowing for a modular electric motor construction with interchangeable ring packs to adjust power output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a conventional reel design with gearbox and intermediate components is used, then the torque can be transmitted to the reel head, but the installation space required is large and the device complexity increases
Solution Approach 1:
The patent extracts and removes the gearbox and intermediate shaft from the drive train, creating a direct connection between the electric motor and reel head. This eliminates unnecessary components while maintaining torque transmission capability, thereby reducing installation space and device complexity.
Solution Approach 2:
The patent merges the electric motor directly with the reel head by connecting the rotor shaft directly to the reel head, eliminating the need for separate gearbox and coupling components. This integration reduces the overall footprint and simplifies the device structure.
2Ease of manufacture
If conventional reels are individually manufactured for specific applications, then the drive train can be optimized for each application, but the manufacturing cost increases and adaptability decreases
Solution Approach 1:
The patent creates a universal reel design where the electric motor can be directly connected to the reel head through a standardized interface. The modular design allows the same basic structure to serve multiple applications by simply changing the motor power rating or reel head configuration, eliminating the need for completely customized designs for each application.
Solution Approach 2:
The patent segments the reel into modular components (electric motor, reel head, frame) that can be independently selected and combined. This modular architecture allows for easy adaptation to different applications by swapping components rather than redesigning the entire system.
3Area of stationary object
If the electric motor is directly connected to the reel head without a gearbox, then the installation space is reduced, but the motor must generate higher torque directly
Solution Approach 1:
The patent changes the motor selection parameters by choosing motors specifically designed for direct-drive applications with high torque density. By selecting appropriate motor types (such as servo motors or torque motors) that are optimized for direct connection, the system achieves the required torque output without needing a gearbox to multiply torque.
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 solution reduces the installation space required, lowers manufacturing costs, and enables energy-efficient operation by eliminating unnecessary components and allowing for easy adjustment of power output.
Implementation Method 1
the electric motor is formed with a stator and a rotor, wherein the stator surrounds the rotor. The stator is formed from a winding package with a plurality of windings and surrounds the rotor, wherein the rotor is formed from a ring package with a plurality of rings, each with magnets on a circumference of the respective ring
Data Source
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AI summary
The invention relates to a reel (10) for winding or unwinding material in strip form, in particular a metal strip or the like, and to a method for tensioning a coil (12), the reel comprising a frame (13), at least one reel head (14) for arranging the the coil for winding or unwinding material (11), a drive assembly (15) with at least one electric motor (16), and a shaft (20) connecting the electric motor to the reel head, the electric motor being formed with a stator (17) and with a rotor (18) and being arranged on the frame, the electric motor being a torque motor or synchronous motor, the shaft connecting the rotor directly to the reel head, the rotor being mounted on the stator so as to be axially displaceable relative to the stator.