Motor Chucking Mechanism Radial Support for Thin Profile
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Solution Overview
Problem
Conventional chucking mechanisms for CD/DVD drives in laptop computers face challenges in reducing axial height while maintaining motor stability and bearing life, as reducing the axial height of the bearing mechanism degrades rotational stability and shortens bearing life.
Innovation Solution
The proposed chucking mechanism includes a turn table with a first cylindrical portion, a discoid portion, and a second cylindrical portion, along with a chucking member featuring radially movable claws and elastic members that apply a bias force to secure the data storage disk, allowing for a reduced axial height without compromising stability or bearing life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the axial height of the bearing mechanism is reduced to reduce motor thickness, then the motor thickness is reduced, but the rotational stability of the turn table deteriorates
Solution Approach 1:
The patent introduces a radial dimension solution by extending the bearing mechanism radially outward to support the turn table, rather than only extending it axially. This allows the bearing to provide stable rotational support without increasing the axial height, thereby resolving the contradiction between reducing motor thickness and maintaining rotational stability.
2Length of moving object
If the axial height of the bearing mechanism is reduced to reduce motor thickness, then the motor thickness is reduced, but the bearing life is reduced
Solution Approach 1:
The patent extends the bearing mechanism radially outward to create additional oil reservoir space without increasing axial height. This radial extension allows sufficient oil to be retained in the bearing mechanism, ensuring proper lubrication and extended bearing life while maintaining reduced motor thickness.
3Length of moving object
If the axial length of components is reduced to reduce motor thickness, then the motor thickness is reduced, but it becomes difficult to maintain motor properties
Solution Approach 1:
The patent employs radial extension of the bearing mechanism to compensate for reduced axial dimensions. By distributing the bearing structure radially outward, the design maintains sufficient oil capacity and rotational stability even with reduced axial height, thereby preserving motor reliability while achieving thinner motor profile.
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
This configuration enables a thinner motor design while maintaining rotational stability and prolonging bearing life by supporting the turn table and shaft with a longer sleeve length, ensuring stable operation and extended motor lifespan.
Implementation Method 1
a plurality of elastic members arranged radially between the radially inner wall of the main body and the plurality of chucking claws, applying bias force pressing the chucking claws in the radially outer direction
Data Source
AI summary
A turn table of a motor includes a first cylindrical portion extending in an axial direction, a first discoid portion radially outwardly extending from the first cylindrical portion, and a second discoid portion radially outwardly extending from the second cylindrical portion. A chucking member arranged on the turn table includes a main body having a diameter substantially the same as that of a center opening of a data storage disk to be arranged on the motor. The chucking member also includes a plurality of chucking claws having radially tip ends arranged radially outside of the outer circumferential surface of the main body and a plurality of coil springs applying bias force pressing the chucking claws in the radially outer direction. A radially inner end of each of the coil springs comes in contact with and is supported by at least one of the radially inner wall of the main body and the second cylindrical portion of the turn table.