Sheet Material Dispenser Motor Isolation With Integrated Mounting
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Solution Overview
Problem
Existing automatic sheet material dispensers, such as those for paper towels and tissue paper, suffer from noise and vibration issues due to DC motors and gears, which are amplified by lightweight plastic chassis and housing, leading to perceived poor quality and increased costs from additional noise-dampening components.
Innovation Solution
A noise dampener is integrated into the dispenser structure to isolate the motor and gears from the chassis, using a motor support component, a noise-dampening gap, and connectors to reduce noise and vibration transfer, thereby simplifying design and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If DC motors and gears are used to power the dispensing mechanism, then high armature RPM speeds are achieved, but noise and vibration are produced that are amplified by the chassis
Solution Approach 1:
A dampener is introduced as an intermediary component between the motor/gears and the chassis. The dampener includes a motor support component with a dampening element that contacts the chassis, serving as a mediator to absorb and reduce noise and vibration while allowing the motor to operate at high speeds without directly transmitting harmful vibrations to the chassis
2Object-generated harmful factors
If additional motor mounts and isolators are added to dampen noise, then noise reduction is achieved, but device complexity and cost increase
Solution Approach 1:
The dampener integrates multiple functions into a single component: the motor support component provides structural support for the motor, while the dampening element integrated into this component provides noise and vibration reduction. This merging eliminates the need for separate motor mounts and isolators, reducing part count and complexity while maintaining effective noise dampening
3Object-generated harmful factors
If additional mounting parts and components are implemented, then motor noise dampening is improved, but manufacturing cost increases
Solution Approach 1:
The dampener combines the motor support structure and noise-dampening function into a single integrated component that can be manufactured as one piece. This eliminates the need for multiple separate parts that would require assembly, reducing manufacturing complexity and production costs while effectively dampening motor noise
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 attenuates noise and vibration, providing a quieter operation and improved user experience while maintaining dispenser quality and reducing the number of parts and production costs.
Implementation Method 1
A motor support component (89) and a motor mount component (91) may be spaced apart to define a noise-dampening gap (92) between the motor support component and the motor mount component to isolate the motor mount component from the chassis
Data Source
AI summary
A noise dampener for implementation with a sheet material dispenser is disclosed. The dampener attenuates motor and moving part noise audible to a user of the dispenser and quiets dispenser operation. In an embodiment, a noise dampener may be an integral part of the dispenser motor support structure. An embodiment of a noise dampener may include a motor support component, a motor mount component which supports a motor, and a plurality of connectors. The connectors may be integrated with and join the motor support component and the motor mount component to provide support for the motor mount component with respect to the motor support component and to provide spacing between such components collectively reducing noise audible to a user.