Rotating Tool Main Shaft with Offset Opening for Seating Check
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Solution Overview
Problem
Conventional rotating-tool main shafts suffer from the formation of dents in the circular conical hole due to repeated collisions between the male tapered portion and the opening, leading to fluid leaks and increased maintenance costs, as existing solutions like chamfering are insufficient for long-term prevention.
Innovation Solution
A rotating-tool main shaft with a tool seating check function featuring a hollow main shaft with a circular conical hole and an offset opening for fluid blowout, which reduces the likelihood of collision and dent formation by providing a cylindrical portion that extends from the small-diameter end of the conical hole, allowing the fluid to clean the conical hole and male tapered portion without direct contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the opening is positioned at the edge of the circular conical hole for fluid blowout, then the fluid can effectively clean the conical hole and male tapered portion, but the male tapered portion repeatedly collides with the opening edge causing dent formation
Solution Approach 1:
The opening is repositioned from the edge of the circular conical hole to the side wall of the hollow main shaft at an offset position. This spatial relocation in a different dimension eliminates the collision path between the male tapered portion and the opening edge, preventing dent formation while preserving the fluid cleaning function through the offset position
2Manufacturing precision
If chamfering is applied to the opening edge to reduce collision damage, then short-term improvement is achieved, but dents still form during long-term use
Solution Approach 1:
The opening is extracted from its original position at the edge of the circular conical hole and relocated to the side wall of the hollow main shaft. This separation removes the source of collision damage entirely, providing a permanent solution that extends the service life of the circular conical hole without relying on progressive chamfering
3Manufacturing precision
If the opening is positioned to avoid collision, then dent formation is prevented, but fluid cleaning effectiveness may be reduced
Solution Approach 1:
The offset opening acts as an intermediary that indirectly performs the cleaning function. By positioning the opening on the side wall rather than at the edge, the fluid still reaches the conical hole and male tapered portion through the offset position, maintaining cleaning effectiveness while eliminating direct collision
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
Prevents dent formation in the circular conical hole, maintaining proper attachment detection and reducing machining costs by ensuring the fluid passage remains unobstructed, thus enhancing the reliability and cost-effectiveness of the tool seating check mechanism.
Implementation Method 1
By monitoring the pressure in the fluid supplying passage 111, it becomes apparent whether or not the tool holder 102 is properly attached to the tool holding unit 104
Implementation Method 2
an opening to blow out a fluid, wherein the opening is provided in a portion offset from the circular conical hole
Data Source
AI summary
A rotating tool is held in a tool holder. The tool holder includes a male tapered portion. The tool holder is rotated by a rotating-tool main shaft. The rotating-tool main shaft includes a hollow main shaft. The hollow main shaft includes a circular conical hole formed in a tip and corresponding to the male tapered portion. The hollow main shaft includes a fluid passage to detect that the male tapered portion is properly attached to the circular conical hole, and an opening to blow out a fluid. The opening is provided in a portion offset from the circular conical hole.