Core Drill Controller Cooling Layout for Better Handling
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Solution Overview
Problem
Existing core drills face challenges in effectively cooling the controller, which can lead to overheating and affect performance and handling.
Innovation Solution
The core drill design includes a configuration where the controller is positioned between the motor and the grip part, with air-intake ports in the controller-housing part, allowing for effective cooling through airflow, and the grip part is aligned with the rotational axis to improve weight balance and handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the controller is positioned in the motor-housing part, then the structure is compact, but the controller overheats due to insufficient cooling
Solution Approach 1:
The housing is divided into separate motor-housing part and controller-housing part, allowing independent optimization of cooling for the controller while maintaining compact integration. The controller-housing part includes dedicated air-intake ports and exhaust ports that are separate from the motor housing, enabling targeted cooling airflow to the controller without interfering with motor cooling.
Solution Approach 2:
A fan is introduced as an intermediary component to actively generate cooling airflow. The fan blows air through the air-intake ports, across the controller, and out through the exhaust ports, creating a controlled cooling path that effectively removes heat from the controller without requiring direct exposure or complex passive cooling structures.
2Temperature
If air-cooling paths are added for the controller, then cooling effectiveness improves, but the device complexity increases
Solution Approach 1:
The fan serves multiple functions: it cools the controller by blowing air through the controller-housing part, and also contributes to motor cooling by directing airflow toward the motor. The air-intake ports and exhaust ports are strategically positioned to serve both cooling needs simultaneously, reducing overall system complexity while achieving effective cooling for both components.
Solution Approach 2:
The cooling paths for the controller and motor are merged into a unified airflow system. The air-intake ports are positioned to allow air to flow across both the controller and motor, and the exhaust ports are arranged to discharge heat from both components, creating an integrated cooling solution rather than separate independent systems.
3Ease of operation
If the grip part is aligned with the rotational axis, then weight balance and handling improve, but the structural design becomes more constrained
Solution Approach 1:
The grip part is deliberately positioned asymmetrically relative to the motor housing, specifically aligned with the rotational axis rather than being centrally or evenly distributed. This asymmetric placement optimizes the weight distribution and center of gravity for better handling and control during operation, while the modular housing design accommodates this asymmetric arrangement without excessive complexity.
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 configuration effectively cools the controller, enhances handling by improving weight balance, and ensures easier operation of the core drill.
Implementation Method 1
at least a portion of the controller is disposed between the motor and the grip part
Data Source
AI summary
A core drill includes: a motor having a rotor, which is rotatable relative to a stator about a rotational axis extending in the front-rear direction; a speed-reducing mechanism, which is disposed more forward than the stator; an output shaft, at least a portion of which is disposed more forward than the speed-reducing mechanism and which, in the state in which a core bit is mounted thereon, is rotated by the rotational force of the rotor transmitted via the speed-reducing mechanism; a battery-mounting part, on which a battery pack is mounted; a motor-housing part, which houses the motor; a grip part, at least a portion of which is disposed along the extension of the rotational axis more rearward than the motor-housing part; and a controller, which controls the motor. In the front-rear direction, at least a portion of the controller is disposed between the motor and the grip part.