Cutting Tool Storage Box With Rotating Sleeve Retention
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Solution Overview
Problem
Conventional storage cases for cutting tools face issues with inconsistent retaining forces due to thermal deformation and dimensional deviations, leading to difficulty in inserting or removing the tool, risk of damage during handling, and scratches on the case interior.
Innovation Solution
A storage case design where the shank housing is elastically fixed to the bit housing through complementary unevenness portions and a rotating sleeve mechanism, providing a strong yet adjustable retaining force that prevents accidental release during drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the shank is forcibly fitted into a standardized insertion portion, then the retaining force is strong, but it is hard to put the cutting tool in or out and fingers may be cut
Solution Approach 1:
The insertion portion is designed to elastically deform during insertion and removal operations. The elastic deformation allows the insertion portion to temporarily yield to applied force, enabling easy insertion and removal, while returning to its original shape to maintain strong retaining force during normal use
Solution Approach 2:
The retaining force parameter is made variable through elastic deformation. During insertion/removal, the elastic material temporarily reduces its retaining force by deforming, and during normal operation, it maintains high retaining force through elastic recovery
2Reliability
If the retaining force is strong, then the shank is securely held, but it is hard to put the cutting tool in or out away from the insertion portion
Solution Approach 1:
The elastic properties of the insertion portion create a dynamic retaining force that adapts to operational needs. The material deforms elastically under insertion force to allow easy tool entry, then maintains secure retention during normal handling through elastic recovery
3Ease of operation
If the storage case is configured to easily put the cutting tool in or out, then the ease of operation is improved, but the retaining force is limited and the shank may be extracted due to impact
Solution Approach 1:
The elastic material allows the retaining force parameter to dynamically change based on applied load. During normal easy insertion/removal operations, the elastic force provides sufficient retention, while during impact events, the elastic deformation absorbs energy and prevents complete disengagement
4Strength
If the shank housing is provided with latch bosses and the bit housing with locking grooves, then the shank housing is securely engaged to the bit housing, but it causes inconvenience and requires strong pulling force to release
Solution Approach 1:
The elastic insertion portion provides a dynamic engagement mechanism that maintains strong connection during normal use through elastic retention force, while allowing easy release when sufficient force is applied to overcome the elastic force, eliminating the need for strong pulling operations
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 elastic fixation ensures secure retention of the cutting tool, reducing the risk of damage and improving handling safety, while allowing easy insertion and removal without excessive force, and maintaining the tool's integrity even during accidental drops.
Implementation Method 1
an elastic member to elastically press the shank against an inner peripheral surface of the bit housing
Data Source
Figure 1
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Figure 4~5
AI summary
Disclosed is a storage case for a cutting tool, the storage case including a bit housing for receiving a tool bit of the cutting tool and a shank housing for receiving a shank, of which a lower end of the bit housing is overlapped with an upper end of the shank housing. A sleeve that is rotatably fitted on an upper portion of the shank housing, and the lower end of the shank housing is fitted onto an outer peripheral surface of the sleeve. An inner peripheral surface of the sleeve and an outer peripheral surface of an upper portion of the shank housing are provided with complementary unevenness portions, in which in a process of rotating the shank housing while holding the bit housing, the unevenness portions are not aligned with each other, and the sleeve gets wider outwardly to fix the bit housing, while the upper portion of the shank housing gets narrower inwardly to fix the shank. If the shank housing is rotated in a state in which the shank housing abuts against the bit housing at a right angle, the shank housing and the bit housing are fixed to each other, and the shank is elastically fixed to the inner peripheral surface of the bit housing.