Tool Grinder Airflow Diversion for Motor Cooling and Dust Discharge
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Solution Overview
Problem
Conventional hand-held tool grinding machines suffer from inadequate heat dissipation within the motor, leading to significant temperature rises in the casing, which affects user comfort due to prolonged heat dissipation paths that are inefficient and often obstructed by the user's grip.
Innovation Solution
A tool grinding machine design featuring a casing with strategically positioned air inlets and outlets, a rotating airflow generator, and a diversion structure that creates a shorter, more effective airflow path through the motor, ensuring heat is dissipated directly from the motor and casing without user interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the airflow generator is disposed between the motor and the grinding member to discharge dust, then dust discharge function is achieved, but the heat dissipation path becomes too long and heat dissipation effect is limited
Solution Approach 1:
The patent divides the airflow path into two separate functions: one path for dust discharge through the grinding member area, and another dedicated path for heat dissipation through the motor area. This segmentation allows each function to operate independently with optimized airflow paths, solving the contradiction between dust discharge and heat dissipation effectiveness.
Solution Approach 2:
The airflow generator is designed to serve multiple functions simultaneously: it generates wind current that flows through both the grinding member area for dust discharge and the motor area for heat dissipation. By making the airflow system multi-functional, the patent resolves the contradiction between dust discharge capability and heat dissipation effectiveness.
2Temperature
If the air inlet is positioned at the top of the casing to allow external air entry, then heat dissipation is improved, but the user blocks the air inlet while gripping, causing poor air intake effect
Solution Approach 1:
The patent positions the air inlet at the bottom of the casing rather than at the top, creating an asymmetric airflow path that rises upward through the motor area. This asymmetric positioning ensures that the user's grip at the top of the handle does not block the air inlet, while still achieving effective heat dissipation through the motor.
Solution Approach 2:
The patent changes the vertical positioning dimension of the air inlet from top to bottom of the casing. This dimensional change allows the airflow to enter from below and rise upward through the motor area, avoiding blockage by the user's hand while maintaining effective heat dissipation paths.
3Temperature
If the wind current path is extended to cover both dust discharge and heat dissipation, then comprehensive cooling is achieved, but the path becomes too long resulting in limited heat dissipation effect
Solution Approach 1:
The patent segments the wind current path into distinct sections: a short path for heat dissipation through the motor area, and a separate path for dust discharge through the grinding member area. This segmentation creates multiple shorter, more efficient airflow paths instead of one long path, improving heat dissipation effectiveness while maintaining comprehensive cooling coverage.
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 solution effectively reduces motor and casing temperatures, enhancing user comfort by improving heat dissipation efficiency and reducing waste heat accumulation, while maintaining ease of use and grip functionality.
Implementation Method 1
the driving component comprises a motor and an airflow generator that rotating synchronously with the motor
Implementation Method 2
the airflow generator is provided to enable the tool grinding machine to define a first airflow path which is composed of the at least one air inlet, the first opening, the interior of the motor, the second opening, the airflow generator and the at least one first air outlet
Data Source
AI summary
A tool grinding machine comprises a casing formed with at least one air inlet and at least one first air outlet; a driving component disposed in the casing; and a diversion structure. The driving component comprises a motor with a motor housing; and an airflow generator rotating synchronously with the motor and located at an end of the motor that is not connected to a grinding member. The motor housing comprises at least one first opening and at least one second opening communicating with an interior of the motor. The diversion structure is disposed in the casing or on the motor housing, and the diversion structure is provided to enable the tool grinding machine to define a first airflow path, which is composed of the air inlet, the first opening, the interior of the motor, the second opening, the airflow generator and the first air outlet sequentially.