Rotatable Body Mounting with Bernoulli Air-Flow Centering
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Solution Overview
Problem
Existing rotatable body mounting devices struggle to automatically center the mounting hole of a rotatable body on the axial center of a rotation shaft without physical contact, especially when inserting the rotation shaft into the mounting hole.
Innovation Solution
A rotatable body mounting device utilizing a holding unit with a holder, actuation mechanism, and movable shaft, employing Bernoulli effect through air intake and exhaust to automatically center the mounting hole on the axial center of the rotation shaft, with non-contact movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the rotation shaft is placed in non-contact with the peripheral edge of the mounting hole, then foreign matter adhesion is prevented, but automatic centering becomes difficult to achieve
Solution Approach 1:
The patent employs pneumatic fields (air flow) to achieve both non-contact holding and automatic centering. Intake equipment introduces air flow between the rotation shaft and mounting hole peripheral edge, while exhaust equipment removes air from the space between the rotatable body and holding surface, creating pneumatic forces that enable centering without mechanical contact
Solution Approach 2:
The patent changes the parameters of air flow (intake and exhaust) to generate forces for automatic centering. By controlling the intake and exhaust air flow rates and pressures, the system creates sufficient force to automatically center the mounting hole on the axial center of the rotation shaft while maintaining non-contact conditions
2Ease of operation
If air flow is used to generate centering force, then non-contact centering is achieved, but the generated force is extremely small
Solution Approach 1:
The patent uses pneumatic fields to generate centering force without mechanical contact. The intake equipment introduces air flow between the rotation shaft and mounting hole, while the exhaust equipment removes air from the holding space, creating pressure differences that generate sufficient centering force
Solution Approach 2:
The patent optimizes air flow parameters (intake and exhaust rates, pressures) to maximize the generated centering force. By carefully controlling these parameters, the system achieves adequate force magnitude for automatic centering while maintaining non-contact operation
3Measurement precision
If the holder directly holds the rotatable body, then positioning is achieved, but movement along the holding surface is restricted
Solution Approach 1:
The patent uses pneumatic fields to hold the rotatable body on the holding surface while allowing free movement. The exhaust equipment removes air from between the rotatable body and holding surface, creating a pneumatic holding force that maintains positioning without mechanical contact, thus preserving movement freedom
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 device achieves automatic centering of the mounting hole on the axial center of the rotation shaft, minimizing contact and preventing operational defects from foreign matter adhesion during the mounting process.
Implementation Method 1
the intake equipment is constituted so as to make Bernoulli effect appear by the intake air during the movable shaft-side mounting state or during the rotation shaft-side mounting state, thereby moving the rotatable body such that the center of the mounting hole is positioned on the axial center of the rotation shaft
Implementation Method 2
the intake equipment allows air on the side of a surface opposite to the surface to be held in the rotatable body to flow in a space between an inner peripheral surface of the insertion part and an outer peripheral surface of the rotation shaft or that of the movable shaft
Implementation Method 3
the exhaust equipment discharges the air from a discharge port opened to the holding surface side toward the surface to be held
Data Source
AI summary
A rotatable body is configured to be held to a holding surface of a holder in a non-contact state by an action of air, and a movable shaft having a same axial center as a rotation shaft. A leading end of the movable shaft directly faces an end of the rotation shaft. The movable shaft is housed in an insertion part of the holder so as to be movable in an axial direction. Centering is automatically performed by making a Bernoulli effect appear by the air flowing from a side of a first surface of the rotatable body opposite to a second surface of the rotatable body toward the second surface of the rotatable body through a space between an outer periphery of the movable shaft or an outer periphery of the rotation shaft and a peripheral edge of a mounting hole.