Conical Dust Separator Ribs Centrifugal Deflection Power Tools
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Solution Overview
Problem
Existing devices for removing dust from cooling air in electric hand-held power tools are complex, bulky, power-intensive, and inefficient, leading to damage of motor components due to dust particles, which reduces tool lifespan and performance.
Innovation Solution
A dust separator designed as a truncated hollow cone with ribs on its surface, mounted on the motor shaft, uses the motor's rotation to deflect larger dust particles away from entering the tool, allowing only smaller particles to reach the motor, thus protecting internal components while being simple to manufacture and power-efficient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex passive fan assembly with mechanical barriers is used to remove dust, then dust particles are effectively eliminated from cooling air, but the device becomes bulky, difficult to manufacture, and consumes excessive power
Solution Approach 1:
The invention extracts only the essential function of dust removal from the complex passive fan assembly. By using a simple conical separator with ribs that deflects dust particles through centrifugal force, it eliminates the need for mechanical barriers and complex structures while maintaining effective dust elimination from cooling air.
Solution Approach 2:
Instead of using mechanical barriers to block dust particles as in conventional solutions, the invention inverts the approach by using a smooth conical surface that leverages centrifugal force to naturally deflect dust particles outward. This inversion simplifies the structure while maintaining effectiveness.
2Reliability
If a complex passive fan assembly with mechanical barriers is used to remove dust, then dust particles are effectively eliminated from cooling air, but manufacturing becomes difficult and space requirements increase
Solution Approach 1:
The invention extracts only the essential function of dust removal from the complex passive fan assembly. By using a simple conical separator with ribs that deflects dust particles through centrifugal force, it eliminates the need for mechanical barriers and complex structures while maintaining effective dust elimination from cooling air.
Solution Approach 2:
The invention changes the geometric parameters of the separator to a simple conical shape with specific rib configurations. This allows the component to be manufactured as a single piece using standard machining or molding processes, dramatically improving ease of manufacture compared to complex assemblies with multiple mechanical barriers.
3Reliability
If a complex passive fan assembly with mechanical barriers is used to remove dust, then dust particles are effectively eliminated from cooling air, but the tool dimensions and weight increase
Solution Approach 1:
The invention extracts only the essential function of dust removal from the complex passive fan assembly. By using a simple conical separator with ribs that deflects dust particles through centrifugal force, it eliminates the need for mechanical barriers and complex structures while maintaining effective dust elimination from cooling air.
Solution Approach 2:
The invention uses a conical (curved) separator shape that is more compact than straight mechanical barriers. The curved surface allows dust particles to be deflected along a compact spiral path, reducing the overall space required and consequently decreasing tool dimensions and weight.
4Reliability
If a complex passive fan assembly with mechanical barriers is used to remove dust, then dust particles are effectively eliminated from cooling air, but power consumption increases reducing available power for tool operation
Solution Approach 1:
The conical separator with ribs is driven directly by the motor shaft and uses the motor's own rotational energy to deflect dust particles through centrifugal force. This self-service mechanism requires no additional power input beyond what the motor already produces, maintaining dust removal efficiency without increasing overall power consumption.
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
Effectively filters out larger dust particles, reducing wear on motor components, minimizing tool weight and power consumption, and preventing deep dust penetration into the tool, thereby extending tool life and maintaining performance.
Implementation Method 1
uses the motor's rotation to deflect larger dust particles away from entering the tool
Data Source
Figure 1~2
Figure 3~4
AI summary
The present invention belongs to the field of working processes and transport, more precisely to the field of devices for cooling the drive motor of electric hand-held power tools. A separator (1) of the device for removing dust particles from the cooling air for electric hand-held power tools according to the invention is designed in the shape of a cylinder or preferably as a truncated hollow cone with a bottom ring (11) and an upper ring (12) with a circular surface (121) with a hub (122). The separator has on the circumference in of the cone one or more, preferably nine uniformly distributed ribs (13) rotated for an angle a with regards to the transverse axis of the cone. Each rib (13) has a surface (131), which due to its position enables bouncing off larger dust particles, when a working drive motor (2) spins a fan (3) for cooling the motor (2) and creates suction of outer air through the separator (1) in a handle (42). The cooling air enters the housing (4) through entry slots (421) of the handle (42) and openings (14) of the separator (1), while it leaves through outlet openings (431) of a reducer part (43), which closes the housing (4). Because the larger dust particles are removed before entering the tool, only cooling air with smaller dust particles enters the interior of the electric tool.