Hammer Structure Anti-Loosening Shaft Mechanism
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Solution Overview
Problem
Conventional hammers with hitting blocks secured by threads are prone to loosening due to strong impact and vibration, leading to potential damage and difficulty in replacing the hitting block.
Innovation Solution
A hammer structure that includes a hammer body, a hitting block, a compression spring, and a shaft, where the shaft is inserted into an accommodating hole in the hitting block and can be elastically extended and retracted, preventing the hitting block from loosening by engaging with a radial through hole in the hammer body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the hitting block is secured only by thread engagement, then the structure is simple and easy to assemble, but the hitting block easily loosens due to strong impact and vibration
Solution Approach 1:
The shaft is divided into two functional sections: a small-diameter shaft section that engages with the radial through hole for anti-loosening, and a large-diameter shaft section that provides leverage for assembly and disassembly. This segmentation allows each part to fulfill its specific function optimally.
Solution Approach 2:
The shaft acts as an intermediary mechanism between the compression spring and the hitting block mounting system. It translates the elastic force from the compression spring into rotational locking action through engagement with the radial through hole, preventing loosening without requiring complex threading.
2Reliability
If the hitting block is tightly secured to prevent loosening, then the reliability improves, but the difficulty of replacing the hitting block increases
Solution Approach 1:
The shaft is designed to be dynamically movable between two states: locked (when the small-diameter section engages the radial through hole) and unlocked (when the large-diameter section is pressed to compress the spring and disengage). This dynamic capability allows the system to maintain reliability during use while enabling easy replacement when needed.
Solution Approach 2:
The compression spring is pre-loaded to store elastic energy that automatically engages the shaft with the radial through hole, creating the locked state before the hitting block is subjected to impact forces. This preliminary action ensures the hitting block is secured without requiring additional fastening operations.
3Strength
If the thread segments are designed to withstand hitting force, then the fixation strength improves, but the thread segments are still easily damaged due to direct transmission of impact force
Solution Approach 1:
The harmful function of direct impact force transmission to the thread segments is extracted and redirected through the shaft-compression spring mechanism. The shaft engages the radial through hole to bear the impact forces, while the compression spring absorbs and dissipates the shock, protecting the thread segments from damage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The described hammer structure effectively prevents the hitting block from loosening during use, thereby avoiding damage to the thread surfaces and simplifying the replacement process of the hitting block.
Implementation Method 1
The shaft is accommodated in the accommodating hole and can be elastically extended and retracted through the compression spring
Data Source
AI summary
A hammer structure includes a hammer body, at least one hitting block, a compression spring, and a shaft. The hammer body has a radial through hole. The hitting block includes a mounting portion having an accommodating hole. The compression spring is accommodated in the accommodating hole. The shaft is inserted through the compression spring so that it can be elastically extended and retracted via the compression spring. The mounting portion of the hitting block is screwed to the end of the hammer body. The shaft counteracts an elastic force of the compression spring to be partially engaged in the radial through hole. The hammer structure can prevent the hitting block screwed to a mounting groove of the hammer body from being loosened due to strong impact and vibration in the hitting process, so as to fix the hitting block and avoid damage effectively.