Impacting Tool Dustproof Locking Mechanism
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Solution Overview
Problem
Conventional impacting tools lack effective dust-proof measures, allowing dust to invade the bit holder during processing operations like hammering or hammer drilling on concrete, which affects the tool's performance and longevity.
Innovation Solution
The impacting tool design includes a tool holder and locking mechanism that allows for relative movement, enabling a smaller size and easier replacement of components, along with a dustproof cover and tip sleeve to prevent dust ingress, enhancing the dust-proof effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the tool holder is made as a separate part from the impact bolt holder, then the size can be reduced to minimum necessary dimension and replacement cost can be reduced, but the structural complexity increases
Solution Approach 1:
The tool holder is divided into separate components: the tool holder body, the impact bolt holder, and the tip sleeve. This segmentation allows the tool holder to be minimized to the smallest necessary size for holding the bit, reduces replacement costs when hooks wear off, and enables selective replacement of only the tool holder rather than the entire assembly.
2Reliability
If dust-proof measures are added to prevent dust from invading the bit holder, then the tool's durability is improved, but the device complexity increases
Solution Approach 1:
A tip sleeve is provided that fits over the bit inserting hole to prevent dust from entering. The tip sleeve is designed to be removable and replaceable, providing effective dust protection while maintaining a simple structure that does not significantly increase device complexity.
3Ease of manufacture
If the tool holder is made smaller in size, then manufacturing cost is reduced, but the space for accommodating components is reduced
Solution Approach 1:
The tool holder is designed with nested components where the locking part moves within the tool holder body, and the tip sleeve fits over the bit inserting hole. This nesting arrangement allows all necessary components to be accommodated in a minimized volume, reducing manufacturing costs while maintaining full functionality.
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 improved design effectively prevents dust from entering the tool holder, reducing wear and tear, and allows for cost-effective replacement of worn parts, thereby enhancing the tool's durability and operational efficiency.
Implementation Method 1
the steel ball is pressed by the tip of the tool bit, so that it goes against the energizing force of a compressive coil spring
Implementation Method 2
an impact bolt for applying the impact force in the longitudinal direction on the tool bit
Data Source
AI summary
It is an object of the invention to improve dustproof effect for a impacting tool. The representative impacting tool has a tool holder 153 and a locking part 157. The locking part 153 can be driven to move between the bit holding position, where it is engaged with the tool bit 119 inserted into the bit inserting hole 153a with respect to the tool holder 153 so that pullout is restrained, and a bit holding released position where the engagement is released and pullout is allowed. In addition, the locking part 157 and the tool holder 153 can be integrated with each other while moving in the longitudinal direction of the tool bit, so that they can be driven to move between the bit anchored position where the locking part 157 is set at the bit holding position and the engagement state with respect to the tool bit 119 is maintained, and the bit last connection/disconnection allowed position where the locking part 157 is set at the bit holding released position and releasing of the engagement with respect to the hammer bit 119 is allowed.