Grinding Machine Airflow Structure for Motor Heat Dissipation
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Solution Overview
Problem
Conventional electric tool grinding machines without active dust suction structures face inefficiencies in heat dissipation due to poor airflow intake and short cycle ventilation, leading to waste heat accumulation that affects user comfort.
Innovation Solution
The design includes an airflow generating member with specific blade configurations and distances to create a temporary airflow storage area, enhancing heat dissipation without requiring an active dust suction structure, by ensuring adequate airflow paths and distances for efficient heat discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If vent holes are spaced apart on the grinding disc cover, then air intake is improved, but short flow problem occurs causing limited heat dissipation effect
Solution Approach 1:
The patent introduces a longitudinal dimension to the airflow path by creating a temporary storage area between the airflow generating member and the grip body. This extends the airflow path from a simple radial direction to a three-dimensional path that includes axial movement, allowing air to be stored and redirected to adjacent vent holes rather than short-circuiting directly.
Solution Approach 2:
The temporary storage area acts as an intermediary space between the airflow generating member and the vent holes. This intermediate region captures the initially discharged air and redirects it to adjacent vent holes, preventing direct short flow and improving overall heat dissipation efficiency.
2Device complexity
If airflow generating member is positioned close to vent holes, then structure is compact, but short flow problem occurs reducing air intake efficiency
Solution Approach 1:
By utilizing the longitudinal space between the airflow generating member and the grip body, the patent creates a temporary storage area that adds a third dimension to the airflow path. This allows the structure to remain compact while effectively increasing the airflow path length and preventing short flow.
3Loss of energy
If active dust suction structure is added, then heat dissipation is improved, but device complexity and cost increase
Solution Approach 1:
The patent enables the airflow generating member to serve dual functions: generating the primary heat dissipation airflow and creating a temporary storage area that redirects airflow to prevent short flow. This self-service approach eliminates the need for separate active dust suction structures while maintaining effective heat dissipation.
Solution Approach 2:
The airflow generating member is designed to perform multiple functions simultaneously: generating heat dissipation airflow, creating a temporary storage area, and redirecting airflow to adjacent vent holes. This multi-functionality replaces the need for additional dedicated dust suction components.
4Device complexity
If shaft diameter of eccentric block is small, then device is compact, but waste heat transfer speed is insufficient leading to heat accumulation
Solution Approach 1:
The patent employs pneumatic principles by using the airflow generating member to create a controlled airflow field that actively removes heat from the electric motor. The temporary storage area enhances this pneumatic system by redirecting airflow to improve heat transfer efficiency without requiring increased shaft diameter.
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 improved design effectively reduces heat accumulation in the electric motor, maintaining user comfort during prolonged use by ensuring efficient heat dissipation through optimized airflow pathways.
Implementation Method 1
when the airflow generating member 62 rotates, the airflow generating member 62 introduces air through the vent holes 611 for heat dissipation
Implementation Method 2
the airflow generating member 62 introduces air through the vent holes 611 for heat dissipation
Implementation Method 3
the waste heat generated by the electric tool grinding machine during operation
Data Source
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AI summary
An electric tool grinding machine (20) has an electric motor (21), a grip body (22), a cover (24) connected to the grip body (22), an eccentric block (25) in the cover (24) and driven by the electric motor (21), and an airflow generating member (26) attaching on the eccentric block (25). The grip body (22) has at least one air hole (228). The cover (24) is devoid of a vent hole, the airflow generating member (26) has a bottom plate (261) and a plurality of fan blades (262), a second distance (31) is defined between a top edge of the fan blades (262) and the grip body (22), a third distance (32) is defined between an outer edge of the fan blades (151) and the cover (24), the second distance (31) is at least 50% of a longitudinal length of the fan blades (262), the third distance (32) is at least 50% of a radial length of the fan blades (262), and an outer diameter of the airflow generating member (26) is greater than the first distance (30).