Motor-Driven Fan Cooling for Electric Pruners
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Solution Overview
Problem
Motorized pruners often suffer from overheating due to inadequate cooling, leading to reduced performance and user discomfort, with existing heat sinks increasing size and not providing sufficient cooling during prolonged use.
Innovation Solution
Incorporating a fan to cool the motor, driven by the electric motor actuating the cutting tool, eliminating the need for a dedicated cooling motor and reducing bulkiness, with the fan capable of operating in both directions to optimize airflow and minimize noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a passive heat sink is used to cool the motor, then the cooling function is provided, but the size of the shears increases
Solution Approach 1:
The motor serves dual functions: actuating the cutting tool and driving the cooling fan. The motor's own rotational motion is utilized to power the fan, eliminating the need for a separate cooling mechanism and reducing overall device size.
Solution Approach 2:
The cooling function is merged with the motor's actuation function. The fan is directly coupled to the motor shaft, combining the motor's primary function (tool actuation) with the cooling function through a single integrated component system.
2Temperature
If a passive heat sink is used to cool the motor, then the cooling function is provided, but the cooling efficiency is insufficient during prolonged use
Solution Approach 1:
The cooling fan operates periodically whenever the motor is activated for cutting operations. This periodic operation provides active cooling during high-heat generation periods, improving cooling efficiency compared to passive heat sinks while maintaining productivity.
Solution Approach 2:
The motor automatically drives the cooling fan during its operation, creating a self-regulating cooling system that activates when needed (during motor use) and provides sufficient cooling power without external control mechanisms.
3Temperature
If a dedicated motor is added to drive the fan, then the cooling performance is improved, but the device complexity and bulkiness increase
Solution Approach 1:
The motor is designed to perform multiple functions: actuating the cutting tool through the transmission mechanism and driving the cooling fan simultaneously. This multi-functionality eliminates the need for a dedicated cooling motor, reducing device complexity.
Solution Approach 2:
The motor's actuation function and cooling fan drive function are merged into a single component system. The motor shaft directly drives both the cutting tool mechanism and the cooling fan, simplifying the overall device architecture.
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 enhances cooling efficiency by up to 30%, reduces the pruner's size and weight, improves user comfort, and simplifies the architecture while maintaining effective ventilation and noise reduction.
Implementation Method 1
a fan arranged to cool said motor electric
Data Source
Figure 1a~1b
Figure 2~4
Figure 5~6
AI summary
The invention relates to a portable electric power pruner comprising a cutting tool (504) and an electric motor (202) for operating said cutting tool (504). Furthermore, the portable electric power pruner includes a fan (302) arranged to cool said electric motor (202).