Removable Clamp Shaft Fixing Part for Cleaner Tool Spindles
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Solution Overview
Problem
Existing work tools face issues with foreign matter entry and complex disassembly for repair due to the design of clamp shafts and lock assemblies, leading to early deterioration and maintenance challenges.
Innovation Solution
A work tool design featuring a clamp shaft with a removable fixing part that uses a spring biasing mechanism and inclined surfaces to securely attach and detach tool accessories from the spindle, allowing for easy replacement and maintenance without disassembling the tool body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the clamp shaft is inserted into a hole of the spindle and held by a lock assembly during operation, then the tool accessory can be securely fixed, but foreign matters may enter the tool body through the hole causing early deterioration of the internal mechanism
Solution Approach 1:
The clamp shaft is divided into two separable parts: a shaft part that remains inserted in the spindle during operation, and a fixing part that can be removed. This segmentation allows the shaft part to maintain secure fixation while the removable fixing part can be taken out to prevent foreign matter entry and facilitate maintenance.
Solution Approach 2:
The fixing part is extracted from the shaft part, allowing it to be removed independently. This extraction enables the fixing part to be separated for maintenance or replacement without affecting the shaft part that remains in the spindle, thus preventing foreign matter accumulation and mechanism deterioration.
2Ease of operation
If the clamp shaft is pulled out of the spindle at the time of replacement of the tool accessory, then the tool accessory can be replaced, but the tool body needs to be disassembled for repair if any defect occurs in the internal mechanism
Solution Approach 1:
The clamp shaft is segmented into a shaft part and a fixing part that can be separated. The shaft part remains in the spindle for easy tool accessory replacement, while the fixing part can be removed for maintenance. This segmentation eliminates the need for complete disassembly of the tool body for repairs.
Solution Approach 2:
The fixing part is extracted and made removable from the shaft part. This allows the fixing part to be easily removed for maintenance or replacement without requiring disassembly of the tool body, significantly improving ease of repair while maintaining ease of tool accessory replacement.
3Ease of manufacture
If the fixing part is integrally coupled to the shaft part by moving upward relative to the shaft part, then the fixing part can be easily attached and detached, but the coupling mechanism requires precise alignment and movement control
Solution Approach 1:
The coupling between the fixing part and shaft part is designed to be dynamic rather than static. The fixing part can move upward relative to the shaft part to engage or disengage, providing ease of attachment and detachment. The dynamic coupling mechanism accommodates alignment variations while maintaining secure connection during operation.
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 design prevents foreign matter entry and simplifies maintenance by allowing the fixing part to be removed and reattached easily, reducing the need for extensive disassembly and enhancing tool longevity.
Implementation Method 1
the clamp shaft is configured to be biased upward and to fix a tool accessory to a lower end portion of the spindle by the fixing part
Data Source
AI summary
A work tool includes a spindle and a clamp shaft. The spindle is supported to be rotatable around a driving axis defining an up-down direction of the work tool. The clamp shaft includes a shaft part and a fixing part. The shaft part extends coaxially with the spindle. The fixing part is coupled to the shaft part on a lower side of the spindle. The clamp shaft is supported to be movable in the up-down direction relative to the spindle. The clamp shaft is configured to be biased upward and to fix the tool accessory to a lower end portion of the spindle by the fixing par. The fixing part is configured to be removable from the shaft part and to be integrally coupled to the shaft part only by moving upward relative to the shaft part.