Chuck Adapter for Hand-Held Power Tool
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Solution Overview
Problem
Existing hand-held power tools are limited to accommodating tools with specific coupling contours, such as SDS-Quick or HEX, and are not suitable for tools with circular or round shank types, restricting their versatility.
Innovation Solution
A hand-held power tool design that incorporates a chuck adapter with a spring-loaded locking sleeve and a percussion mechanism, allowing for the use of tools with various coupling contours, including SDS mini tools, HEX tools, and round-shank drills, through a cost-effective and reliable chuck adapter system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the tool holder is designed exclusively for specific coupling contours (SDS-Quick or HEX), then the locking mechanism is simple and reliable, but the adaptability to different tool types is limited
Solution Approach 1:
The patent introduces a chuck adapter as an intermediary component between the tool holder and the tool. The chuck adapter has a first coupling contour that matches the tool holder (SDS-Quick or HEX) and a second coupling contour that can accommodate round-shank tools. This mediator allows the tool holder to work with different tool types without modifying the tool holder itself, thus resolving the contradiction between adaptability and device complexity
Solution Approach 2:
The chuck adapter is designed with universal functionality to accommodate multiple tool types. The actuating sleeve mechanism provides a unified locking approach that works with both SDS-Quick/HEX tools and round-shank tools, making the system multi-functional while keeping the base tool holder design simple
2Adaptability or versatility
If a chuck adapter is introduced to accommodate round-shank tools, then the adaptability increases, but the device complexity increases
Solution Approach 1:
The locking mechanism is designed with universal applicability. The actuating sleeve, when rotated, universally acts on both the locking balls (for SDS-Quick/HEX) and the locking element (for round-shank tools) through the same rotational motion. This multi-functional design allows one locking mechanism to serve multiple purposes without requiring separate complex systems for different tool types
Solution Approach 2:
The patent merges the locking functions for different tool types into a single integrated mechanism. The actuating sleeve combines the functionality of releasing locking balls and disengaging the locking element into one unified component that performs both actions through a single rotational operation, thereby reducing overall system complexity despite increased adaptability
3Ease of operation
If the actuating sleeve is designed to rotate for actuation, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The actuating mechanism utilizes periodic rotational action to achieve locking and unlocking. The actuating sleeve is designed to be rotated in a specific direction to engage the locking mechanism, and rotated in the opposite direction to release it. This periodic rotational action provides an intuitive and easy-to-operate interface while maintaining relatively simple mechanical construction through the use of standard rotational movements
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
Enables the use of a wide range of tool types with different coupling contours, providing a universal and versatile hand-held power tool solution for percussion drilling and screwdriving applications.
Implementation Method 1
the actuating sleeve is connected to a restoring spring which acts on the actuating sleeve axially in the direction of the chuck adapter, the actuating sleeve being displaceable axially in the direction of the locking sleeve against a restoring force provided by the restoring spring
Implementation Method 2
the tool holder preferably has a spring-loaded locking sleeve for locking the first tool in the tool holder
Implementation Method 3
The percussion mechanism preferably has a percussion bolt, which is designed to drive the first tool or the chuck adapter in percussion
Data Source
Figure 1
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AI summary
In a hand-held machine tool, having a tool holder for holding at least one first tool, which has a tang having a first coupling contour that is able to be connected to the tool holder and having a striking mechanism for the striking drive of the first tool connected to the tool holder in the axial direction of the tool holder in a striking operation associated with the hand-held machine tool, a chuck adapter is provided to hold at least one second tool, which has a tang provided with a second coupling contour, which is able to be connected to the chuck adapter in a torsionally fixed manner.