Nested Sleeve Quick-Release Connecting Rod for Collision Resistance
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Solution Overview
Problem
Conventional quick-release mechanisms in extension rods for rotary tools are prone to damage from collisions and lack structural reinforcement, leading to unsmooth operation and high costs for additional structural features.
Innovation Solution
A quick-release tool connecting rod design featuring a rod body with a push rod and locking mechanism, where a first sleeve member with higher hardness is embedded within a second sleeve member of lower hardness, providing structural strength and protection against collisions, and allowing for stable assembly and quick release through a movable locking member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single sleeve structure is used in the quick-release mechanism, then the device complexity is reduced, but the reliability and resistance to collision damage deteriorates
Solution Approach 1:
The patent employs a nested sleeve structure where a first sleeve member is placed inside a second sleeve member. The first sleeve member contains the quick-release mechanism components, while the second sleeve member provides external protection and collision resistance. This nested arrangement allows the inner sleeve to perform its functional operations while the outer sleeve absorbs external impacts, thereby improving reliability without significantly increasing device complexity.
Solution Approach 2:
The patent uses two different materials for the two sleeve members, each selected for specific properties. The first sleeve member is made of a material suitable for precise mechanical operation, while the second sleeve member is made of a more robust material to resist collision damage. This composite material approach allows each component to be optimized for its specific function, improving overall reliability while maintaining reasonable complexity.
2Strength
If the sleeve material is made harder to resist collision damage, then the strength is improved, but the ease of operation deteriorates due to increased brittleness
Solution Approach 1:
The patent divides the protective function into two separate sleeve members with different material properties. The first sleeve member maintains appropriate hardness for operational flexibility and smooth operation of the quick-release mechanism, while the second sleeve member provides enhanced collision resistance. This segmentation allows each component to be optimized independently, preventing the operational issues that would arise from using a single hard material for both protection and operation.
Solution Approach 2:
The patent applies different material qualities to different parts of the system - the first sleeve member has material properties optimized for operational smoothness and precise movement, while the second sleeve member has material properties optimized for collision resistance. This local quality differentiation ensures that each region of the structure has the appropriate properties for its specific function, avoiding the trade-off between hardness and operability.
3Reliability
If reinforcement structures or identified structures are added to the sleeve or rod body, then the reliability is improved, but the manufacturing cost increases
Solution Approach 1:
The nested sleeve structure provides reinforcement without requiring additional complex features on the rod body or sleeve surfaces. By placing one sleeve inside another, the structure gains enhanced strength and collision resistance through the simple additive arrangement of components, avoiding the need for expensive identified structures, reinforcing ribs, or complex surface features that would increase manufacturing cost.
Data Source
AI summary
A quick-release tool connecting rod is provided, including: a rod body, a quick-release mechanism and a second sleeve member. The rod body includes an inner space extending in an axial direction and a through hole communicated with the inner space. The quick-release mechanism includes a push rod received within the inner space, a locking member disposed within the through hole and a first sleeve member sleeved to the rod body. The first sleeve member is movable relative to the rod body in the axial direction to drive the push rod to move. The second sleeve member is co-movably sleeved to the first sleeve member, and the first sleeve member is partially embedded within an inner peripheral wall of the second sleeve member. The first sleeve member has a first hardness, and the second sleeve member has a second hardness which is smaller than the first hardness.