Hammer Mechanism for Handheld Power Tool Attachments
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Solution Overview
Problem
Existing tool attachments for handheld power tools are not suitable for drilling in hard stone or concrete due to limited operational capabilities.
Innovation Solution
Incorporation of a hammer mechanism within the tool attachment that imparts axial impacts to the insertion tool, enhancing its ability to drill through hard materials by utilizing a pneumatic or mechanical hammer mechanism, gear transmission, and a spring-loaded design for increased impact energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a standard tool attachment without hammer mechanism is used, then the device complexity remains low, but the tool cannot drill in hard stone or concrete
Solution Approach 1:
The patent combines a hammer mechanism with a standard tool attachment for handheld power tools. The hammer mechanism includes a piston, beater, and impact bolt integrated into the attachment housing, merging drilling and hammering functions in a single device that can handle both soft and hard materials.
Solution Approach 2:
The hammer mechanism utilizes pneumatic principles where a piston driven by pneumatic pressure from the handheld power tool converts linear motion into impact forces through the beater and impact bolt, enabling hammer drilling capability without requiring a completely separate mechanical drive system.
2Reliability
If a hammer mechanism is added to enable drilling in hard stone or concrete, then the drilling capability is improved, but the device complexity increases
Solution Approach 1:
The hammer mechanism employs dynamic elements including a movable piston, spring-loaded beater, and impact bolt that converts rotational motion from the power tool into axial impact forces. The mechanism dynamically adapts between drilling and hammering modes based on operational requirements.
Solution Approach 2:
The hammer mechanism changes operational parameters by converting continuous rotational motion into periodic impact forces. The impact energy and frequency can be adjusted through pneumatic pressure control, allowing adaptation to different material hardness levels while maintaining a relatively simple structural design.
Data Source
AI summary
A tool attachment for a handheld power tool that has a housing having a fastening interface includes: an attachment housing on which there is situated a locking unit for locking the tool attachment on the fastening interface of the handheld power tool; a tool receptacle for accommodating an insertion tool; and a hammer mechanism situated in the attachment housing, which hammer mechanism is configured to apply an impact in the axial direction of the tool receptacle on the insertion tool, during hammer operation of the tool attachment.