Cutting Tool Holder Non-Circular Channel Engagement
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Solution Overview
Problem
Conventional cutting tool holding devices for road planers suffer from improper engagement between the holder and base, leading to reduced service life and increased costs due to reaction forces, which can cause damage to the cutting tools and the holding device.
Innovation Solution
A cutting tool holding device featuring a base with a non-circular channel and a limiting set, including an abutting member and bolt, that securely engages the holder through a non-circular channel and positioning portions, enhancing structural strength and ease of detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a removable fastening member is used to engage the holder with the base, then the cutting tool can be replaced or repaired, but the engagement strength is insufficient and damages occur easily due to reaction forces
Solution Approach 1:
The patent employs asymmetric engagement features including a non-circular channel (rectangular cross-section) in the base that receives a corresponding non-circular shaft in the holder, preventing rotational movement and enhancing engagement strength. The positioning portions with inclined surfaces create an asymmetric locking mechanism that resists reaction forces while maintaining ease of detachment through the removable fastening member.
Solution Approach 2:
The positioning portions are pre-configured with inclined surfaces that engage before the fastening member is fully tightened. This preliminary engagement action pre-loads the connection, ensuring proper alignment and initial strength before the final tightening phase, preventing damage from misalignment under reaction forces.
2Reliability
If the structural configuration is improved to resist reaction forces, then the service life increases, but the device complexity increases
Solution Approach 1:
The engagement mechanism is segmented into distinct functional components: the non-circular channel provides structural strength and positioning, the positioning portions with inclined surfaces provide preliminary engagement and alignment, and the removable fastening member provides final securing and ease of detachment. This segmentation allows each component to be optimized for its specific function without over-complicating the overall structure.
Solution Approach 2:
The holder is nested within the base through the non-circular channel and shaft configuration, with the positioning portions nested within the channel structure. The removable fastening member is nested within the engagement interface. This nested arrangement provides strong engagement and resistance to reaction forces while maintaining a compact and relatively simple overall structure.
3Strength
If the base and holder are designed for strong engagement, then damage from reaction forces is reduced, but the ease of detachment for tool replacement decreases
Solution Approach 1:
The engagement system transitions from a static rigid connection to a dynamic system with two phases: during operation, the non-circular channel and positioning portions provide strong rigid engagement to resist reaction forces; during maintenance, the removable fastening member can be detached to allow easy separation. This dynamic capability resolves the contradiction between strong engagement and ease of detachment.
Solution Approach 2:
The removable fastening member is extracted as a separate, dedicated component that can be independently removed. This extraction allows the main engagement structure (non-circular channel and positioning portions) to maintain strong structural strength while the extracted fastening member provides the detachment function, resolving the contradiction between strength and ease of operation.
Data Source
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AI summary
A cutting tool holding device (100), which is for holding a cutting tool, includes a base (200), a holder (300), and a limiting set (400), wherein the holder (300) is disposed on the base (200), and the limiting set (400) is disposed in a non-circular channel (230) of the base (200). A connecting shaft portion (320) of the holder (300) is for inserting into a storage hole (220) of the base (200), wherein the connecting shaft portion (320) includes a shaft body (322) and at least one positioning portion (321), and the non-circular channel (230) includes an abutting member (420) and a bolt (410). The bolt (410) is passed through the abutting member (420), wherein the abutting member (420) is moved to an opening hole (222) of the storage hole (220) along an axis (I1) by rotating the bolt (410) so as to push the positioning portion (321) and abut the shaft body (322).