Tubular Drive Damper for Quiet Window Screening Rollers
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Solution Overview
Problem
Existing tubular drive arrangements in screening arrangements, such as those used in roof windows, often produce significant vibration and acoustic noise during operation.
Innovation Solution
Incorporating a resilient damper connected to the engagement means of the drive part, which isolates vibrations from the motor and reduces noise propagation by using resilient materials like silicone rubber with progressive spring rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tubular drive arrangement is used in a screening arrangement, then the operation is reliable, but vibration and acoustic noise are generated
Solution Approach 1:
A resilient damper is introduced as an intermediary element between the drive part and the roller tube. This damper absorbs and dissipates vibrations generated by the motor during operation, preventing their transmission to the roller tube and reducing acoustic noise while maintaining the reliable operation of the drive arrangement.
Solution Approach 2:
The physical properties of the connection between the drive part and roller tube are changed by introducing a resilient material with specific damping characteristics. This parameter change allows the system to maintain mechanical connection for reliable operation while transforming the rigid connection into a vibration-absorbing flexible connection.
2Force
If the drive part applies high torque at end positions, then the screening arrangement can be moved to end positions, but substantial pressure is applied to the roller tube causing noise
Solution Approach 1:
The resilient damper is pre-installed between the drive part and roller tube to provide cushioning before high torque is applied at end positions. This beforehand cushioning prevents direct impact and reduces noise generation when the drive part applies substantial pressure to move the screening arrangement to its end positions.
3Object-generated harmful factors
If resilient dampers are added to reduce noise, then vibration isolation is improved, but device complexity increases
Solution Approach 1:
The resilient damper is integrated into the existing drive part structure, merging the vibration isolation function with the existing mechanical components. This combining approach reduces the overall device complexity compared to adding completely separate vibration isolation components.
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 effectively reduces noise levels during both the movement and end positions of the screening arrangement, making the operation virtually silent and minimizing resonance risks.
Implementation Method 1
The term 'resilient' denotes a spring-like quality of the damper and suitable spring performance is obtained by adapting the shape of resilient damper(s) and/or the hardness of the selected material.
Implementation Method 2
The term 'damper' implies a damping capacity of the damper, i.e. a mechanical property of materials which indicates the ability to dissipate elastic strain energy during mechanical vibration or wave propagation.
Data Source
AI summary
A tubular drive arrangement (20) for a screening arrangement (10) for a window, in which a drive part (24) coupled to drive shaft and a motor of the drive arrangement comprise engagement means (24.1, 24.2) configured to be connected to counterpart engagement means (12.1, 12.2) of a roller tube (12) of the screening arrangement in an assembled condition. At least one resilient damper (31, 32) is connected to or connectable to the engagement means (24.1, 24.2, 24.3) of the drive part (24).