Handheld Cleaning Machine Motor Cooling and Vibration Damping
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Solution Overview
Problem
Hand-held cleaning and grinding machines often cause user fatigue due to their weight distribution and vibration, as the heaviest components are not centered, leading to inefficient operation and discomfort during extended use.
Innovation Solution
A hand-held cleaning and grinding machine design with a drive motor positioned between the operator's hands, incorporating a channel for airflow cooling and a floating mounting system for the drive motor and transmission device, which reduces vibration and noise transmission, allowing for a more ergonomic grip and reduced fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the drive motor is positioned in the handle for better weight distribution, then user fatigue is reduced, but cooling the motor becomes more difficult due to limited space
Solution Approach 1:
The air channel is nested within the handle structure itself, utilizing the existing handle volume to create a cooling passage. The channel is formed by recesses in the handle that define the cooling airflow path, effectively nesting the cooling system within the structural component without adding external bulk.
Solution Approach 2:
The handle serves multiple functions: it provides structural support for gripping, houses the cooling channel for motor thermal management, and positions the motor optimally for weight distribution. This multi-functionality resolves the contradiction by making the handle a universal component that addresses both ergonomics and thermal cooling.
2Stability of the object's composition
If the drive motor and gearbox are mounted rigidly to the housing, then structural stability is improved, but vibration and noise transmission to the user increases
Solution Approach 1:
A vibration-dampening intermediary layer is introduced between the drive motor/gearbox and the housing. This intermediary material absorbs and dissipates vibrations while allowing the components to remain securely mounted, thus mediating between structural stability requirements and vibration reduction needs.
Solution Approach 2:
The housing is designed with built-in vibration-dampening features and mounting structures that preemptively reduce vibration transmission before it reaches the user. The cushioning is integrated into the housing design itself, providing prior protection against vibration and noise propagation.
3Ease of operation
If the handle is designed for secure gripping, then ease of operation is improved, but the overall machine weight increases
Solution Approach 1:
The handle is segmented into functional zones: a gripping zone with ergonomic contours for hand placement, and an integrated cooling channel zone that uses recesses to define airflow paths. This segmentation allows the handle to provide secure grip functionality while the cooling function is achieved through structural recesses rather than added components.
Solution Approach 2:
The handle structure simultaneously provides ergonomic gripping surfaces and houses the cooling channel system. The same structural elements that create the grip-friendly contours also define the cooling airflow paths, eliminating the need for separate cooling components that would add weight.
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 design enables fatigue-free operation by centering the weight of the machine and minimizing vibration and noise, providing a secure grip and improved usability for extended periods without tiring the operator.
Implementation Method 1
The fan generates an airflow that flows through the channel and around the drive motor, thus cooling it
Data Source
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AI summary
The hand held cleaning or grinding machine (10) has a holding device (12) for holding a cleaning or grinding machine. A channel is arranged between a driving motor and a fan device for the driving motor or a transmission device. The channel is formed in a handle (68) for holding the cleaning or grinding machine.