Cutting Tool Holder Elastic Positioning Member
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Solution Overview
Problem
Conventional cutting tool holding devices experience frequent damage and high maintenance costs due to inadequate engagement between the base and cutting tool holder, leading to a short tool lifetime and excessive replacements during operations like road planing and excavation.
Innovation Solution
The cutting tool holding device incorporates a base with a mounting hole and through hole, a positioning tube with an axial receiving hole and limiting groove, and a positioning member that expands elastically to enhance the engagement stability between the base and positioning tube, using a C-shaped elastic tube to reinforce the assembly and resist reaction forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional fastening members (screws) are used to engage the cutting tool holder with the base, then the device structure is simple and easy to manufacture, but the engagement is not firm enough leading to frequent damage under reaction forces
Solution Approach 1:
The patent changes the engagement mechanism from mechanical screw fastening to elastic deformation engagement. The positioning member utilizes elastic deformation to provide continuous engagement force, transforming the engagement parameter from static (screw tightness) to dynamic (elastic recovery force), thereby achieving stronger and more reliable engagement without increasing structural complexity
Solution Approach 2:
The positioning member acts as an intermediary between the base and the positioning tube. It mediates the engagement by deforming elastically to accommodate the positioning tube and then recovering to provide continuous engagement force, distributing the reaction forces and preventing direct stress concentration between rigid components
2Reliability
If the base and cutting tool holder are not firmly engaged, then the device structure remains simple, but serious damages occur in the cutting tool holder and base due to reaction forces
Solution Approach 1:
The positioning member provides beforehand cushioning by elastically deforming before the full engagement force is applied. This elastic deformation absorbs shock and distributes reaction forces over time, preventing sudden stress peaks that would cause damage to the base and positioning tube during operation
Solution Approach 2:
The patent utilizes elastic deformation as a parameter change mechanism. The positioning member transitions from a rigid connection to a flexible elastic connection, allowing it to adapt to dimensional variations and maintain reliable engagement under varying operational conditions, thereby improving reliability without complex control systems
3Duration of action of stationary object
If frequent replacement of cutting tool holder and base is performed, then the cutting tool can be maintained, but the maintenance cost increases significantly
Solution Approach 1:
The positioning member uses elastic deformation parameters to extend the service life of the base and positioning tube. By providing continuous engagement force and absorbing operational shocks, it prevents premature failure and wear, allowing these components to last through many more tool replacements cycles
Solution Approach 2:
The positioning member is designed as a relatively inexpensive component that can be replaced easily, while it protects the much more expensive base and positioning tube from wear. This follows the principle of using a cheap, replaceable element to protect valuable components, reducing overall maintenance costs
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 increases the load-bearing capacity of the base and positioning tube, preventing displacement and extending their lifespan, thereby reducing maintenance costs and improving operational reliability.
Implementation Method 1
a positioning member that expands elastically to enhance the engagement stability between the base and positioning tube
Data Source
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AI summary
A cutting tool holding device (00) includes a base (200), a positioning tube (300) and a positioning member (400). The base (200) includes a mounting hole (20) and a through hole (240), and the through hole is formed at a side of the mounting hole and communicated with the mounting hole. The positioning tube (300) includes an axial receiving hole (310), an accommodated portion (320) and a limiting groove (321. The axial receiving hole is formed within the positioning tube for receiving a cutting tool (A). The accommodated portion (320) is disposed at an end of the positioning tube (300) for being installed into the mounting hole (220). The limiting groove (321) is formed on a side of the accommodated portion (320). The positioning member (400) is positioned in the through hole (240) of the base, wherein the positioning member abuts against the limiting groove (321) of the positioning tube. (300)