Multi-Tool Holding Structure for Same-Direction Rotary Shafts
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Solution Overview
Problem
Existing tool holding devices struggle to stably hold multiple rotary tools in the same direction due to limitations in shaft extension and contact between components, affecting machining accuracy.
Innovation Solution
A tool holding device design featuring a first and second shaft with bearings and projections, allowing for extended shaft rotation and stable tool holding, with a driving-force input unit and rotation transmitting unit to manage the rotation of the shafts, enabling the secure alignment of multiple rotary tools in the same direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the turret and tool rotating shafts are disposed so as not to come into contact with each other, then the structure is simplified and ease of manufacture is improved, but the tool rotating shafts cannot be extended sufficiently long, worsening manufacturing precision
Solution Approach 1:
The patent applies nesting by placing the first and second bearings inside projection portions that extend from the turret body. This nested arrangement allows the tool rotating shafts to be extended longer while keeping the bearings contained within the turret structure, thereby improving manufacturing precision without complicating the overall design
2Adaptability or versatility
If two rotary tools are held in the same direction, then machining versatility is improved, but the shaft structure becomes more complex, worsening device complexity
Solution Approach 1:
The patent applies universality by designing a common turret structure that supports multiple tool rotating shafts (first and second shafts) extending in the same direction. The shared bearing arrangement and unified turret body enable the system to handle multiple rotary tools with consistent orientation, improving adaptability while avoiding the need for separate perpendicular shaft mechanisms
Data Source
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AI summary
The tool holding device includes: a casing including a first surface, a second surface opposed to the first surface, and a first projection and a second projection projecting opposite to the first surface from the second surface; a first tool holding part disposed on the first surface at a position opposed to the first projection; a second tool holding part disposed on the first surface at a position opposed to the second projection; a driving-force input unit disposed at the end of the first projection and rotated by driving force being inputted; a first shaft extending in an axial direction perpendicular to the first surface and the second surface, the driving-force input unit and the first tool holding part being disposed at one end and the other end of the first shaft, respectively; a second shaft extending in the axial direction and having one end housed in the second projection, the second tool holding part being disposed at the other end of the second shaft; and a rotation transmitting unit rotating the second shaft in response to rotation of the first shaft.