Rotating Ring Wrapping Machine Motor Extraction
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Solution Overview
Problem
Existing ring machines for wrapping palletized loads with extendable film face constructional complexities and operational issues due to the need for sealed electrical slip rings, which increase production costs and require frequent quality checks, especially in industries requiring high insulation of electrical systems.
Innovation Solution
A rotating ring machine design where the ring is mounted rotatably on its support structure and rotated by a statically located motor, using a belt drive system with angularly spaced pulleys and a variable speed reducer, eliminating the need for sealed electrical slip rings by transmitting rotational movement through a chain or equivalent mechanism to the pre-stretching rollers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If sealed electrical slip rings are used to power the rotating carriage, then electrical power can be supplied to moving components, but the machine structure becomes complex and production costs increase
Solution Approach 1:
The patent extracts the motor from the rotating carriage and relocates it to a stationary position. The motor now drives the ring through a belt transmission system, eliminating the need for sealed electrical slip rings on the rotating carriage. This separation of the power source from the moving component simplifies the overall machine structure while maintaining the ability to supply electrical power to the rotating elements.
Solution Approach 2:
The patent replaces the electrical slip ring system with a mechanical belt transmission system. Instead of using electrical contacts to power the rotating carriage, a stationary motor coupled with a belt drive system transmits mechanical power to rotate the ring. This substitution eliminates the complexity of sealed electrical connections while achieving the same functional outcome.
2Reliability
If sealed electrical slip rings are used, then electrical insulation requirements can be met, but quality checks become more frequent and costly
Solution Approach 1:
By extracting the motor from the rotating carriage and placing it stationary, the patent eliminates the sealed electrical slip rings entirely. This removal of the problematic component directly addresses the electrical insulation issues and eliminates the associated quality checking requirements, while still providing the necessary electrical power to the rotating elements through the stationary motor and belt drive system.
3Power
If the motor is located on the rotating carriage, then direct drive is achieved, but the moment of inertia increases and operational speed is limited
Solution Approach 1:
The patent extracts the motor from the rotating carriage and positions it stationary. This extraction removes the heavy motor mass from the rotating system, significantly reducing the moment of inertia of the rotating carriage. The stationary motor still provides direct drive capability through the belt transmission system, achieving both direct drive performance and reduced rotational mass.
Solution Approach 2:
The patent segments the drive system into a stationary motor component and a rotating ring component, connected through a belt transmission. This segmentation allows the heavy motor to remain stationary while only the essential rotating elements (ring and carriage) rotate, reducing the moment of inertia. The belt transmission acts as the coupling mechanism between the stationary and rotating parts.
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 simplifies the machine structure, allows for higher operational speeds, and reduces inertia, enabling easier tension compensation based on load characteristics through automatic speed adjustments, thereby enhancing operational efficiency and reducing production costs.
Implementation Method 1
a belt drive system with angularly spaced pulleys
Implementation Method 2
a variable speed reducer, the output speed of which is varied automatically
Data Source
Figure 1
Figure 2~3
AI summary
Vertical or horizontal axis ring machine, for wrapping usually palletized loads with extendable film, of the type in which the rotating ring (5) carries, mounted thereon, the reel (23) of wrapping film and at least one pair of rubber-lined and motor-driven 5 rollers (13, 113) for pre-stretching the film unwound from the reel and to be fed to the load to be wrapped, characterized in that the said pre-stretching rollers are actuated by a kinematic chain which is supported rotatably by the said ring (5), which projects from the side of the ring opposite to that from where the said pre-stretching rollers and the reel project and which is designed to be actuated by a motor unit which is 10 situated statically on the frame (2) which rotatably supports the said ring (5) and which acts in phase synchronism with the motor (9) actuating this ring.