Rotating Body Attachment Structure for Vibration Noise Suppression
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Solution Overview
Problem
Existing rotating body attachment structures in projection-type image display devices transmit vibration noise from the motor to the rotating body, causing resonance and amplification of noise, which affects attachment accuracy and stability.
Innovation Solution
A rotating body attachment structure that includes an elastic member with a through-hole and a fixing member with a sleeve and screw member, which are inserted into the rotating body and support body, respectively, to attenuate vibration and reduce noise by compressing the elastic member between the attachment surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the rotating body is fixed to the support body in direct contact with screw parts, then the attachment strength is improved, but vibration noise is transmitted and amplified
Solution Approach 1:
An elastic member is introduced as an intermediary between the rotating body and support body. The elastic member receives the attachment function while simultaneously absorbing vibration, preventing direct transmission of vibration noise through the screw parts.
Solution Approach 2:
The physical state of the connection is changed from rigid direct contact to elastic contact. By using an elastic member, the connection parameters change to include vibration absorption capabilities while maintaining attachment strength.
2Force
If the rotating body is fixed using nuts and screw parts, then the fixing force is improved, but attachment accuracy deteriorates due to vibration resonance
Solution Approach 1:
The elastic member serves as a mediator that decouples the vibration source from the attachment structure. This allows the fixing force to be maintained through the elastic member while preventing vibration resonance that would compromise attachment accuracy.
Solution Approach 2:
The elastic member provides beforehand cushioning by absorbing vibrations before they can resonate with the attachment structure. This preventive measure protects attachment accuracy from being compromised by vibration-induced resonance.
3Device complexity
If the rotating body is directly attached to the support body, then the device complexity is reduced, but noise transmission increases
Solution Approach 1:
The elastic member is a simple intermediary component that effectively blocks noise transmission without adding significant structural complexity. It is fitted into an attachment hole and provides vibration absorption with minimal impact on overall device complexity.
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 structure effectively suppresses noise caused by vibration during rotation, ensuring precise attachment and stability of the rotating body while reducing noise transmission to the support body.
Implementation Method 1
an elastic member having a through-hole in an axial direction and fitted into the attachment hole
Data Source
AI summary
A rotating body attachment structure for attaching a rotating body having a hole formed in an attachment surface to a support body having an attachment hole extending through the support body in an axial direction of a rotation axis of the rotating body is provided. The rotating body attachment structure according to the present disclosure includes: an elastic member having a through-hole in the axial direction and configured to be fitted into the attachment hole; and a fixing member including a first portion configured to be inserted into the through-hole in contact with the elastic member, and a front portion configured to be inserted into and fixed in the hole.