SDS Drill Front End With Tubular Extension for Screw-Driving
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Solution Overview
Problem
Current drilling tools equipped with SDS-type connections are not capable of seamlessly transitioning between drilling and screw-driving operations, especially when hammer action is involved, requiring the removal or replacement of drill bits and accessories, which complicates the process.
Innovation Solution
A drilling tool designed to operate in two modes, with and without hammer action, featuring a rotating part with an SDS-type push-fitting mechanism and a tubular extension that allows for removable attachment of a screw-driving element, enabling screw-driving operations without removing the drill bit, along with a brushless motor and microcontroller for speed and mode control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an SDS-type connection is used for hammer action drilling, then the drill bit can be rotated and imparted translational movements for impacts, but the tool cannot be easily adapted for screw-driving operations
Solution Approach 1:
The drilling tool is designed with a universal front end that can accommodate both drill bits with SDS-type connections and screw-driving accessories. The front end includes a drive mechanism capable of transmitting both rotational motion for drilling and combined rotational-axial motion for screw driving, enabling the tool to perform multiple functions without requiring separate specialized tools.
Solution Approach 2:
The tool system is segmented into modular components: the main drilling tool body, interchangeable drill bits, and detachable screw-driving accessories. This segmentation allows the user to attach or detach different accessories based on the required operation, providing versatility while maintaining the core hammer action drilling capability.
2Adaptability or versatility
If a drill bit is removed to perform screw-driving operation, then the screw-driving accessory can be attached, but the operation becomes complicated and time-consuming
Solution Approach 1:
The screw-driving accessory is designed to be pre-configured with the appropriate drive type and geometry for screw driving. The accessory includes pre-installed drive elements that engage with the tool's drive mechanism, eliminating the need for complex assembly or adjustment during operation. This preliminary preparation allows for quick attachment and immediate use.
3Strength
If the tool is designed for hammer action drilling, then it can effectively drill hard materials, but it cannot seamlessly transition to screw-driving mode
Solution Approach 1:
The tool's drive mechanism is designed to be dynamic, capable of adapting its motion characteristics based on the attached accessory. The mechanism can transmit high-impact rotational motion for hammer action drilling when a drill bit is attached, and switch to combined rotational-axial motion for screw driving when an accessory is attached, providing ease of transition between operations.
Data Source
AI summary
A drilling tool configured to operate in two drilling modes, respectively with and without hammer action, said tool comprising a front end equipped with a rotating part for mounting a drill bit by way of an SDS-type push-fitting, characterized in that said rotating part comprises a mechanism for the removable attachment to a first longitudinal end of a tubular extension, 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, such that the tool can be used for a screw-driving operation even when it is equipped with the drill bit.