Impact Hand Tool Split Design Threaded Head
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Solution Overview
Problem
Existing hand tools for punching and impacting tasks suffer from deformation of the tail portion, leading to reduced impact efficiency and safety issues, and require cumbersome handling and storage due to integrated and loose plug-type connections of impact heads and power bodies.
Innovation Solution
A split-type impact hand tool with a threaded connection using plastic materials and a cushion pad to reduce reaction force, allowing easy assembly and disassembly of tool heads, providing a secure and efficient impact mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a traditional integrated chisel structure is used, then the structure is simple, but the tail portion deforms easily during long-term use, reducing impact efficiency and causing safety issues
Solution Approach 1:
The tool is divided into separate components: a power body (handle with impact rod) and a replaceable tool head connected via a threaded connection. This segmentation allows the impact rod to remain intact while enabling replacement of the tool head when worn, resolving the contradiction between structural simplicity and reliability during long-term use.
Solution Approach 2:
The connection structure uses a threaded interface with specific dimensional parameters (thread pitch, diameter, engagement length) that provide sufficient mechanical strength to prevent tail portion deformation while maintaining assembly simplicity. The cushion pad material parameters are also optimized to absorb impact forces effectively.
2Force
If an integrated working head structure is used, then the impact force is concentrated, but multiple tool types must be carried for different working environments, making handling and storage difficult
Solution Approach 1:
The power body with standardized threaded connection serves as a universal platform that can accept multiple different tool heads (chisel heads, punch heads, etc.). This allows a single power body to perform multiple functions across different working environments, eliminating the need to carry multiple separate integrated tools while maintaining concentrated impact force through proper force transmission design.
3Ease of manufacture
If a loose plug-type connection is used between impact head and power body, then assembly is easy, but the connection is too loose for manual impact operation
Solution Approach 1:
A threaded connection structure acts as an intermediary between the impact head and power body, providing both ease of assembly (comparable to plug-type) and sufficient connection strength for manual impact operation. The threads engage between the power body and tool head, creating a secure mechanical connection that transmits impact forces effectively while remaining simple to assemble and disassemble.
4Adaptability or versatility
If different impact tools are used for different working environments, then the tool is specialized for each task, but there are many types to carry, making transportation and storage not easy
Solution Approach 1:
The standardized threaded connection creates a universal system where one power body can accommodate multiple specialized tool heads. Users only need to carry the single power body and swap tool heads as needed, dramatically reducing the total volume required for storage and transportation compared to carrying multiple separate integrated tools, while maintaining full task specialization capability.
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 tool enables improved impact force and efficiency, reduces tool slippage, and facilitates easy replacement and storage of different tool heads, enhancing safety and usability across various tasks.
Implementation Method 1
a cushion pad provided inside the outer sleeve at the vertical center axis
Implementation Method 2
the connecting rod has an outer wall on which an external thread for coupling with the internal thread of the inner hole slot is provided
Data Source
AI summary
An impact hand tool which includes an outer sleeve; an impact rod inserted to connect to the outer sleeve; a cushion pad provided inside the outer sleeve at the vertical center axis; a handle connected to the impact rod; an inner hole slot at a second end of the outer sleeve with an inner wall and an internal thread; and a tool head installed to the outer sleeve through the inner hole slot. The tool head comprises a one-piece structure of a working rod portion and a working head, a connecting rod having an external thread for coupling with the inner hole slot, a connecting sleeve connected to the connecting rod to form an integral and stepped hollow body defining a connecting cavity to receive the working rod portion, and a rubber filler to fill a gap between the working rod portion and the inner wall of the connecting rod.