Grinding Machine Casing Airflow Layout for Motor Heat Dissipation
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Solution Overview
Problem
Conventional electric tool grinding machines suffer from inefficient airflow generation and heat dissipation due to short cycle vent holes and inadequate air intake, leading to waste heat accumulation and discomfort during prolonged use.
Innovation Solution
The electric tool grinding machine incorporates a casing design with partitioning plates and multiple air inlets, including a first air inlet closer to the airflow generating member and a second air inlet further away, creating a pressure difference to enhance airflow volume and improve heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If vent holes are spaced apart and airflow generating member is placed close to them, then the structure is simple, but air intake efficiency deteriorates due to short flow problem
Solution Approach 1:
The invention divides the air inlet function into two separate components: first air inlet holes in the grinding disc cover and second air inlet holes in the casing. This segmentation allows each inlet to serve a specific purpose - the first inlet receives air directly from the airflow generating member while the second inlet provides additional air intake path, thereby resolving the short flow problem and improving overall air intake efficiency without complicating the structure
Solution Approach 2:
The invention introduces an intermediary air passage system connecting the first air inlet holes to the second air inlet holes. This intermediary structure mediates between the airflow generating member and the motor housing, allowing air to flow through a controlled path that avoids the short flow problem while maintaining structural simplicity
2Temperature
If air inlet holes are positioned far from airflow generating member, then heat dissipation coverage is improved, but suction force deteriorates due to distance
Solution Approach 1:
The invention segments the air inlet system into two groups: first air inlet holes positioned close to the airflow generating member to receive strong suction, and second air inlet holes positioned farther away to provide heat dissipation coverage. This segmentation allows each group to optimize for its specific function while working together to solve both contradictions
Solution Approach 2:
The invention utilizes spatial dimensionality by positioning air inlet holes at different locations and orientations on the grinding disc cover and casing. The first air inlet holes are arranged to face the airflow generating member directly, while the second air inlet holes are positioned on the casing to receive air from the first inlets, creating a multi-dimensional air intake system that overcomes the limitations of single-position inlets
3Device complexity
If single air inlet system is used, then device complexity is low, but heat dissipation efficiency deteriorates
Solution Approach 1:
The invention segments the air inlet system into first air inlet holes in the grinding disc cover and second air inlet holes in the casing, with separate airflow paths for each. This segmentation enables dual air intake channels that work in parallel to improve heat dissipation efficiency while maintaining relatively simple device complexity through the use of standard structural elements
Solution Approach 2:
The grinding disc cover serves multiple functions: it protects the grinding disc, provides mounting for the airflow generating member, and incorporates first air inlet holes for air intake. The casing also serves multiple functions including housing the motor and providing second air inlet holes. This multi-functionality reduces the need for additional dedicated components, maintaining device complexity at acceptable levels while improving heat dissipation
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 enhanced airflow design effectively dissipates waste heat from the motor housing, reducing temperature rise and enhancing user comfort during extended use, even without an active dust suction structure.
Implementation Method 1
a pressure difference is generated by the intake air of the at least one first air inlet at the hollow shell which is near the air inlet portion of the motor housing, and air is drawn into the second air inlet
Implementation Method 2
generate an airflow to dissipate heat in the electric tool grinding machine through the airflow generating member, and discharge waste heat generated by an electric motor or a circuit board during operation
Data Source
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AI summary
An electric tool grinding machine (20) includes an electric motor (23), an airflow generating member (24), and a casing (21). The casing (21) includes a hollow shell (211), a motor housing 212() located in the hollow shell (211), two partitioning plates (213) located between a side wall (219) of the motor housing (212) and the hollow shell (211), at least one air outlet (214) facing the airflow generating member (24), a first air inlet (215) formed on the hollow shell (211), and at least one second air inlet (216) formed on the hollow shell (211) and spaced apart from the first air inlet (215). When the airflow generating member (24) is activated, the first air inlet (215) generates a pressure difference in the hollow shell (211) near an air inlet portion (222) of the motor housing (212) to cause air to be drawn into the second air inlet (216).