SDS Drill Front End With Tubular Extension for Screw-Driving
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Solution Overview
Problem
Current drilling tools with SDS-type connections are not easily adaptable for screw-driving operations when equipped with hammer action drill bits, requiring drill bit removal or new attachments, which complicates the transition between drilling and screw-driving modes.
Innovation Solution
A drilling tool with a rotating part that uses SDS-type push-fitting for drill bit attachment, featuring a tubular extension for screw-driving elements, allowing seamless switching between drilling and screw-driving modes without removing the drill bit, and incorporating a brushless motor with mode and speed selectors for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If SDS-type connection is used for hammer action drill bits, then hammer drilling capability is improved, but adaptability for screw-driving operations deteriorates
Solution Approach 1:
The drilling tool is designed with a universal front end that can accommodate both SDS-type drill bits for hammer drilling and tubular extensions with screw-driving elements. The rotating part maintains SDS-type push-fitting means while also providing a connection interface for the tubular extension, enabling the single tool to perform both hammer drilling and screw-driving operations without requiring separate specialized tools.
Solution Approach 2:
The tool is segmented into modular components: the main body with SDS-type connection for drill bits, and a separable tubular extension that can be attached to the rotating part. This segmentation allows the user to attach the tubular extension for screw-driving operations while keeping the drill bit mounted in the main body, enabling easy switching between functions without removing the drill bit.
2Ease of operation
If drill bit is removed to perform screw-driving operation, then screw-driving capability is improved, but operational efficiency deteriorates
Solution Approach 1:
The tubular extension is pre-configured with screw-driving elements and designed to be quickly attached to the rotating part of the tool. This preliminary preparation of the extension allows the user to switch from drilling to screw-driving by simply attaching the extension rather than removing and replacing entire drill bits, significantly reducing the time and effort required for mode switching.
Solution Approach 2:
The tubular extension acts as an intermediary component that bridges the SDS-type connection system and screw-driving functionality. It can be attached to the rotating part while the drill bit remains mounted in the main body, serving as a mediator that enables screw-driving operations without requiring removal of the drill bit, thus maintaining operational efficiency.
3Ease of operation
If new front end is fitted for screw-driving operation, then screw-driving capability is improved, but device complexity deteriorates
Solution Approach 1:
The front end is designed as a universal interface that combines both SDS-type push-fitting for drill bits and a connection mechanism for tubular extensions. This universal design eliminates the need for separate front ends for drilling and screw-driving operations, reducing the overall number of components and simplifying the tool structure while maintaining both functionalities.
Solution Approach 2:
The front end merges two previously separate functions into a single integrated component: the SDS-type connection for hammer drilling and the attachment interface for tubular extensions for screw-driving. This merging reduces the number of separate parts the user must manage and simplifies the overall device structure.
Data Source
Figure 1~3
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Figure 7
AI summary
Drilling tool (10), configured to operate in two drilling modes, respectively with and without hammer action, said tool comprising a front end (12) equipped with a rotating part for mounting a drill bit (18) by means of an SDS-type push-fitting, characterized in that said rotating part comprises means for the removable attachment to a first longitudinal end of a tubular extension (30), this tubular extension being configured to extend along and around a drill bit mounted in the rotating part and comprising a second longitudinal end configured to bear at least one screw-driving element (52), such that the tool can be used for a screw-driving operation even when it is equipped with the drill bit.