Passive Air Curtain Spindle for Sealed Dental Drilling
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Solution Overview
Problem
Conventional dental drilling devices require a separate electrically driven air supply device for air sealing, which is cumbersome and costly, as they rely on continuous air supply to prevent moisture and debris from entering during high-speed processing of ceramic materials.
Innovation Solution
A dental drilling device with a passive air curtain spindle that utilizes a wing-shaped spindle shaft fan to generate air flow, creating a self-sealing air curtain without the need for a separate air supply device, using the spindle's high-speed rotation to prevent dust, water, and cutting oil from entering the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate electrically driven air supply device is used for air sealing, then air sealing effectiveness is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the air sealing function with the existing spindle structure by integrating a fan into the spindle assembly. This merging eliminates the need for a separate air supply device, reducing device complexity while maintaining air sealing effectiveness through the generated air flow that prevents moisture and debris entry.
Solution Approach 2:
The spindle assembly is given multiple functions: it not only rotates the processing drill but also generates air flow for sealing purposes through its integrated fan. This multi-functionality allows the spindle to serve both machining and sealing roles, eliminating the need for dedicated air supply equipment.
2Reliability
If a separate electrically driven air supply device is used for air sealing, then air sealing effectiveness is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines the air sealing function with the existing spindle structure by integrating a fan into the spindle assembly. This merging eliminates the need for a separate air supply device, reducing device complexity while maintaining air sealing effectiveness through the generated air flow that prevents moisture and debris entry.
Solution Approach 2:
The spindle assembly is given multiple functions: it not only rotates the processing drill but also generates air flow for sealing purposes through its integrated fan. This multi-functionality allows the spindle to serve both machining and sealing roles, eliminating the need for dedicated air supply equipment.
3Reliability
If continuous air supply is used for sealing, then sealing effectiveness is improved, but energy consumption increases
Solution Approach 1:
Instead of continuous air supply, the patent uses periodic air flow generation through the rotation of the fan integrated into the spindle. The air sealing is achieved during the operational rotation cycles of the spindle, eliminating the need for continuous air supply while maintaining sealing effectiveness during processing operations.
Solution Approach 2:
The spindle system generates its own air flow for sealing purposes through its integrated fan, using its own rotational motion to create the necessary air current. This self-service approach eliminates dependence on external air supply systems and reduces overall energy consumption by utilizing the spindle's operational energy.
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 passive air curtain spindle effectively seals the device without a separate air supply, reducing manufacturing costs and complexity, while maintaining effective air sealing and cooling the spindle and bearings, thus enhancing the device's operational efficiency and reliability.
Implementation Method 1
generating air flow using a spindle shaft fan that rotates at high speed
Implementation Method 2
air sealing method is used to prevent moisture from entering a gap between the spindle 20 and the housing 10 by spraying air inside the device
Data Source
AI summary
A dental drilling device for manufacturing a dental prosthesis by processing a material made of ceramic or the like includes a spindle including a spindle shaft rotatably mounted inside a drilling device housing and a spindle shaft fan formed in a wing shape on an outer surface of the spindle shaft; a fixing socket fixedly mounted to one end of the drilling device housing and surrounding one end of the spindle at a predetermined interval; a processing drill mounted on a front end of the spindle to process a workpiece; and a driving motor coupled to the other end of the spindle to rotate the spindle.