Double-Handle Blower Layout for Recoil and Battery Weight Balance
Solution Overview
Problem
Blowers used for gardening face issues with recoil forces causing user fatigue and limited performance due to increased weight and battery pack weight, hindering prolonged operation.
Innovation Solution
A blower design with a double-handle structure and strategically positioned battery pack to reduce recoil force impact, allowing for increased battery capacity and improved airflow performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the weight of battery pack and blower are increased to improve performance, then the airflow performance is improved, but the user fatigue is increased
Solution Approach 1:
The patent positions the heavy battery pack as a counterweight between the two handles to balance the recoil force generated by airflow ejection. This allows the battery pack's weight to serve dual purposes: powering the motor and counteracting the recoil force, thereby enabling higher performance without proportionally increasing user burden.
Solution Approach 2:
The patent employs an asymmetric handle configuration where the first handle has a larger gripping surface area than the second handle. This asymmetry allows the user to distribute holding forces differently, with the larger first handle bearing more of the recoil force while the smaller second handle provides stability, optimizing comfort for high-performance operation.
2Power
If the user holds the blower to suppress recoil force, then the blower performance is maintained, but the user fatigue is increased
Solution Approach 1:
The battery pack is strategically positioned between the handles to function as a counterweight that automatically balances the recoil force. This passive counterbalancing mechanism reduces the active muscular effort required by the user to control the blower, thereby reducing fatigue while maintaining full blower power.
Solution Approach 2:
The patent introduces a vertical dimension to force balance by positioning the battery pack below the airflow ejection axis. This vertical placement creates a counterbalancing moment that opposes the horizontal recoil force, allowing the user to maintain control with less effort across multiple force dimensions.
3Duration of action of moving object
If the blower is designed for prolonged operation, then the operational duration is extended, but the performance improvement is limited due to weight constraints
Solution Approach 1:
By positioning the battery pack as a counterweight, the patent enables the use of heavier, higher-capacity batteries without proportionally increasing user fatigue. The counterbalancing effect offsets the additional weight, allowing extended operational duration while maintaining or improving airflow performance.
Solution Approach 2:
The patent changes the spatial parameters of the blower configuration, specifically the position of the battery pack between the handles and the asymmetric sizing of handles. These parameter changes optimize the distribution of forces and weights, enabling prolonged operation with improved performance by allowing greater battery capacity without excessive fatigue.
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 double-handle structure reduces user burden and fatigue while enabling higher battery capacity and airflow volume, enhancing operational efficiency and comfort.
Implementation Method 1
When the blower ejects gas, the ejected object generates a recoil force in a reverse direction due to conservation of momentum.
Data Source
Figure 1
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AI summary
Provided is a blower. The blower includes: a motor; a fan driven by the motor to rotate about a central axis; a battery pack for supplying power to the motor; and a blower tube assembly forming an air inlet for the entry of air and an air outlet for the exit of the air. The blower further includes: a first handle forming a first grip for a hold and a second handle forming a second grip for a hold, where at least part of a projection of the battery pack along a radial direction of the central axis on a plane passing through the central axis is located between the first handle and the second handle. The reduction of the burden on a user during the use of the blower is facilitated.