Disk Chucking Device Axial Sliding Claw Mechanism
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Solution Overview
Problem
Conventional chucking devices struggle to provide a sufficient holding force for laminated disks while maintaining a low-profile design, as they often require increased spring force, which complicates disk mounting and can lead to half-chucking issues.
Innovation Solution
The design incorporates a chucking device with recessed sliding portions on the disk holding surface, allowing for a reduced axial height and circumferential width of claw members, enabling increased disk holding force and ease of disk mounting by adjusting the contact points between the claw members and rest portions, thereby accommodating disks of varying thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the spring force of coil springs is increased to obtain the holding force required for laminated disks, then the holding force is improved, but the disk mounting force is increased making it hard for claw members to move radially inward
Solution Approach 1:
The invention introduces a sliding portion on the disk holding surface that extends in the axial direction (another dimension), allowing the claw member to move axially while maintaining radial holding force. This dimensional change enables the resilient member to compress axially rather than radially, reducing the force required for disk mounting while maintaining sufficient holding force for laminated disks
2Force
If the circumferential width of the disk holding surface is increased to enhance holding force for thick laminated disks, then the holding force is improved, but the axial height of the chucking device is increased
Solution Approach 1:
The sliding portion extends in the axial direction, allowing the claw member to achieve increased holding force through axial positioning rather than increasing circumferential width. This enables the disk holding surface to maintain adequate circumferential contact area while the axial extension of the sliding portion provides the necessary structural support for thick laminated disks without increasing overall axial height
3Length of moving object
If the axial height of the chucking device is reduced for low-profile design, then the profile is improved, but the moving distance of the disk traversing the motor is reduced making mounting more difficult
Solution Approach 1:
The sliding portion provides an axial movement path for the claw member, effectively creating additional mounting distance in the axial dimension. This compensates for the reduced overall axial height of the low-profile chucking device, allowing the disk to be mounted easily as the claw member can slide axially along the sliding portion during the mounting process
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 enhances the holding force for laminated disks, reduces the disk mounting force, and prevents half-chucking, ensuring stable and accurate disk alignment and retention within the chucking device.
Implementation Method 1
resilient members received within the center case; and claw members for holding the disk in place, the claw members remaining in contact with radial outer ends of the respective resilient member
Data Source
AI summary
In a motor including a chucking device for detachably holding a disk, the chucking device has a center case to which a central opening of the disk is inserted; resilient members received within the center case; and claw members for holding the disk in place. Each of the claw members has a tip end portion, a disk holding surface positioned axially below the tip end portion for holding the disk in place, and a recessed sliding portion formed substantially at a circumferential center region of the disk holding surface, the sliding portion serving to guide movement of the claw member. Rest portions are formed in the center case to face the respective sliding portions, the rest portions serving to support the respective sliding portions by contacting therewith. The sliding portions are designed to make contact with the respective rest portions when the disk is mounted to the chucking device.