Driving Head-Changeable Tool with Sliding Sleeve Retention
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Solution Overview
Problem
Existing hand tools with universal joints require complete replacement of the ball socket and drive rod for different driven members, leading to time-consuming and labor-intensive operations.
Innovation Solution
A driving head-changeable tool with a main body and outer sleeve design that allows stable assembly and quick replacement of polygonal ball joints, using a conical coil spring and blocking mechanism to facilitate easy engagement and disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the entire ball socket and drive rod assembly is replaced to change driven members, then the tool can adapt to different driven member sizes and types, but the operation becomes time-consuming and labor-intensive
Solution Approach 1:
The invention divides the drive rod assembly into separable components: a drive rod and a driving head (polygonal ball joint). The driving head can be independently replaced without replacing the entire drive rod assembly. This segmentation allows quick change of driven members by only replacing the driving head, significantly reducing replacement time while maintaining adaptability to different driven member sizes and types.
Solution Approach 2:
The invention employs a dynamic blocking mechanism using a blocking member that can move between a blocking position (retaining the driving head) and a non-blocking position (allowing removal). The outer sleeve slides to control the blocking member's position, enabling quick engagement and disengagement of the driving head. This dynamic mechanism facilitates rapid replacement operations while ensuring stable assembly during use.
2Loss of time
If the blocking member is designed to be easily retractable for quick replacement, then the replacement operation becomes faster, but the stability of the assembled tool may be compromised
Solution Approach 1:
The blocking member is designed with dynamic positioning capability, controlled by the outer sleeve. When the outer sleeve is in the first position, the blocking member protrudes into the chamber to securely retain the driving head, ensuring assembly stability. When the outer sleeve is in the second position, the blocking member retracts to allow quick removal. This dynamic design provides both secure retention during operation and easy replacement when needed.
Solution Approach 2:
The outer sleeve acts as an intermediary mechanism that controls the blocking member's position. By sliding the outer sleeve, the operator can control whether the blocking member is in the blocking position (for stability) or the non-blocking position (for quick replacement). This intermediary mechanism coordinates between the stability requirement and the quick replacement requirement, allowing the system to switch between these two states as needed.
Data Source
AI summary
A driving head-changeable tool is provided, including: a main body, including a chamber and an assembling end, the chamber including concave portions and convex portions alternatively arranged circumferentially, the chamber further including at least one receiving hole each receiving a blocking member; an outer sleeve, disposed around the main body, including a recess and a projection protrusive, the outer sleeve being slidable relative to the main body; wherein when the outer sleeve is located in a first position, the projection urges the blocking member to project within the chamber to retain the polygonal ball joint in the chamber; when the outer sleeve is located in a second position, the blocking member is retractable in the recess to be not protrusive within the chamber so that the polygonal ball joint is disengageable from the chamber.