Impact Tool Head Assembling Mechanism with Retraction
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Solution Overview
Problem
Conventional impact tool heads often deform over time due to repeated impacts, causing the radial flange to expand and become stuck, leading to operational inconvenience.
Innovation Solution
An impact tool head assembling mechanism featuring an engaging sleeve with a tubular wall and retractable projections, and an impact tool head with a radially protruding flange having an inclined surface, where the included angle between the contact position and the peripheral edge is between 25 and 65 degrees, and the projections are ball members with a specific ratio of contact distance to radius, preventing sticking and allowing deformation tolerance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a retaining mechanism (such as a steel ball) is used to restrict the tool head radially, then the tool head can be stably connected to the connecting head, but the radial flange is easily deformed by repeated impact, causing the tool head to become stuck
Solution Approach 1:
The patent changes the geometric parameters of the retaining mechanism by specifying precise angular ranges (25-65 degrees for the inclined surface angle, 10-30 degrees for the projection angle) to optimize the force distribution during impact, reducing radial deformation while maintaining connection stability
Solution Approach 2:
The patent employs spherical ball members as the retaining mechanism instead of traditional radial retaining structures. The spherical shape allows the balls to roll and distribute impact forces more evenly across the flange, reducing localized stress and deformation while maintaining effective restriction
2Manufacturing precision
If the radial dimension of the radial flange matches the connecting head precisely, then stable connection is achieved, but deformation causes the tool head to become stuck
Solution Approach 1:
The patent introduces dynamic elements through the retractable projections and inclined surfaces that allow the connection geometry to adapt during operation. The projections can retract to accommodate flange deformation, maintaining ease of operation even when manufacturing precision varies or deformation occurs over time
Solution Approach 2:
The inclined surface geometry is designed to preemptively counteract deformation effects. By positioning the contact point and designing the angle, the structure compensates for expected radial expansion before it causes sticking, preventing the problem rather than reacting to it
Data Source
AI summary
An impact tool head assembling mechanism is provided, including: an engaging sleeve, disposed on a front end of an impact tool, including a tubular wall and at least one projection, the tubular wall defining an axial direction, the at least one projection being protrudingly and retractably disposed on an inner wall of the tubular wall; an impact tool head, including a rod body and a flange which includes an inclined surface facing toward the front end and an outermost peripheral edge, a contact position being defined as a position where the inclined surface contact with the at least one projection; wherein a reference plane is defined as passing through the outermost peripheral edge and perpendicular to the axial direction, and an included angle between a line from the contact position to the outermost peripheral edge and the reference plane is between 25 and 65 degrees.