Plastic Gear Wheel Vibration Damping in Adjustable Platform Transmission
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Solution Overview
Problem
Conventional adjustable-height platforms, such as examination tables, often produce vibrations and noise during height adjustments, which can discomfort patients and disturb operators, due to the use of metallic materials in their transmission systems.
Innovation Solution
The transmission system incorporates a gear wheel made from or coated with plastic material, which reduces vibrations and noise by absorbing these elements, and can be combined with a steel drive shaft for enhanced vibration damping, allowing for low-noise and low-vibration operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metallic transmission system is used in the adjustable-height platform, then the structural strength and durability are improved, but vibrations and noise levels increase during operation
Solution Approach 1:
The patent applies composite materials by combining metal components (drive shaft, housing) with a plastic gear wheel. The plastic material serves as a vibration-damping element that absorbs vibrations and reduces noise during operation, while the metal components maintain the necessary structural strength and load-bearing capacity. This composite approach resolves the contradiction by allowing each material to contribute its advantageous properties in the same transmission system.
2Object-generated harmful factors
If a plastic gear wheel is used in the transmission system, then vibrations and noise are reduced, but wear resistance decreases compared to metal gears
Solution Approach 1:
The patent applies local quality by making only the gear wheel from plastic material while keeping other transmission components (drive shaft, housing, support structures) made from metal. This localized application of plastic material provides vibration damping and noise reduction precisely where needed in the gear engagement area, while metal components maintain overall structural integrity and wear resistance at critical load-bearing points.
3Ease of manufacture
If a plastic gear wheel is used instead of metal, then manufacturing simplicity and ease of replacement are improved, but load-bearing capacity may be reduced
Solution Approach 1:
The patent applies composite materials by combining metal components (drive shaft, housing) with a plastic gear wheel. The plastic material serves as a vibration-damping element that absorbs vibrations and reduces noise during operation, while the metal components maintain the necessary structural strength and load-bearing capacity. This composite approach resolves the contradiction by allowing each material to contribute its advantageous properties in the same transmission system.
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 use of a plastic gear wheel in the transmission system significantly reduces vibrations and noise levels, enhancing the comfort and operational reliability of adjustable-height platforms, while also simplifying manufacturing and allowing for easy replacement of the gear wheel due to its less wear-resistant nature.
Implementation Method 1
Since the gear wheel comprises plastic, in some exemplary embodiments vibration can be reduced or even completely avoided when operating the transmission
Implementation Method 2
noise levels can also be reduced
Data Source
AI summary
A transmission for an adjustable-height platform includes at least one drive shaft, at least one output shaft, at least one first gear wheel configured to transmit a rotational movement of the drive shaft to the output shaft, and at least one second gear wheel configured to drive a hollow second output shaft. The at least one first gear wheel is formed from or includes at least portions formed from plastic.