Impact Tool Head Flange Design for Sticking Prevention
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Solution Overview
Problem
Conventional impact tools experience radial flange deformation due to repeated impacts, leading to the connecting head becoming stuck, causing operational inconvenience.
Innovation Solution
The impact tool head features a rod body with a radially protruding flange having an inclined surface and a specific contact position, ensuring a distance of at least 0.5 mm between the contact point and the outermost peripheral edge, preventing sticking due to deformation, and incorporating projections and arcuate surfaces for stable engagement and efficient force transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the radial flange is used to connect the tool head to the impact tool, then the connection is stable initially, but after long-term use the radial flange deforms due to repeated impact, causing the connecting head to become stuck
Solution Approach 1:
The connection interface is divided into multiple contact points distributed around the inclined surface, rather than relying on a single radial flange contact. This segmentation distributes the impact forces across multiple locations, preventing localized deformation that would cause sticking.
Solution Approach 2:
The connection mechanism transitions from a radial contact arrangement to an axial contact arrangement. The contact points are positioned on the inclined surface facing the working end portion, utilizing the axial dimension to distribute impact forces away from the radial flange structure.
2Force
If the retaining mechanism (steel ball) repeatedly impacts the radial flange to restrict the tool head, then the tool head is securely held, but the radial flange deforms and expands, causing the connecting head to become stuck
Solution Approach 1:
The impact forces are concentrated on specific localized contact points on the inclined surface rather than being distributed across the entire radial flange. This localized contact approach maintains retention force while preventing widespread deformation of the flange structure.
Solution Approach 2:
The inclined surface acts as an intermediary between the retaining mechanism and the rod body. It translates the retention forces into axial loading on the rod body rather than radial loading on the flange, protecting the flange from deformation.
3Manufacturing precision
If the radial dimension of the radial flange matches the connecting head for stable connection, then the connection is secure, but deformation causes the connecting head to become stuck, requiring disassembly and reassembly
Solution Approach 1:
The design changes the critical dimensional parameter from radial dimension matching to axial distance specification. The distance of 0.5 mm or more between the contact position and outermost peripheral edge provides a tolerance buffer that maintains proper connection without requiring precise radial dimension matching, thereby preventing sticking issues.
Data Source
AI summary
An impact tool head is provided, configured to be disposed on an impact tool, the impact tool head including: a rod body and a flange radially protruding from the rod body, the rod body including a working end portion, the flange including an inclined surface facing toward the working end portion and an outermost peripheral edge, a contact position being defined as a position where the inclined surface configured to be contact with at least one projection of the impact tool; wherein as viewed along the axial direction, a distance between the contact position and the outermost peripheral edge is larger than or equal to 0.5 mm.