Dishwasher Mounting Bracket with Vibration Damping for Pump Stability
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Solution Overview
Problem
Conventional mounting brackets in household appliances, such as dishwashers, constrain the movement of motor housings, leading to the transfer of lateral motion and vibrations to adjacent components, causing potential instability and noise.
Innovation Solution
A mounting bracket with a degree of freedom along its axis is used to secure the pump assembly, allowing for translational or rotational motion, and incorporating a gripping layer with vibration damping material to isolate vibrational motion, reducing vibration transfer to other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional mounting brackets constrain motor housing movement, then structural stability is improved, but vibration transfer to adjacent components increases
Solution Approach 1:
The patent introduces a vibration damping material as an intermediary layer between the motor housing and the mounting bracket. This intermediary absorbs and dissipates vibrational energy, preventing it from being transferred to adjacent components while maintaining the structural stability provided by the constrained mounting bracket.
Solution Approach 2:
The mounting bracket system becomes a composite structure combining the rigid bracket material with a vibration damping material layer. This composite construction allows the system to simultaneously provide structural stability through the rigid bracket and vibration isolation through the damping material properties.
2Reliability
If rigid mounting brackets are used, then component security is improved, but noise generation increases
Solution Approach 1:
The vibration damping material serves as a mediator between the secure rigid mounting bracket and the motor housing. It maintains the secure attachment while intercepting and reducing the mechanical vibrations that would otherwise be transmitted as noise to the appliance structure and surrounding components.
Solution Approach 2:
The patent converts the potentially harmful vibration and noise generated by the motor into a beneficial effect by using the vibration damping material to absorb these vibrations. The energy that would be lost as noise is instead dissipated as heat in the damping material, transforming a harmful byproduct into a functional energy dissipation mechanism.
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
This solution effectively reduces vibration transfer by up to 5 dBa at 125 Hz, enhancing the stability and reducing noise in the appliance, while allowing for flexible mounting of components.
Implementation Method 1
incorporating a gripping layer with vibration damping material to isolate vibrational motion, reducing vibration transfer to other components
Data Source
AI summary
An automatic dishwasher can include a tub having a bottom and at least partially defining an open face treating chamber, a base supporting the bottom of the tub and defining a mechanical area beneath the bottom of the tub, at least one sprayer emitting liquid into the treating chamber, and a rotating inlet filter assembly fluidly coupling the treating chamber to the at least one sprayer. A mounting bracket can be provided to secure the rotating inlet filter assembly to the base.