Compact Cordless Power Tool with Pneumatic Impact Mechanism
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Solution Overview
Problem
Existing electric hand tools are specialized for specific tasks like drilling, screwdriving, or hammering, making them unsuitable for a wide range of applications, particularly in materials like concrete and metal, and are often cumbersome for small tasks.
Innovation Solution
A compact, cordless electric hand tool with a rechargeable battery housed within the tool, featuring a pneumatic impact mechanism and a versatile tool holder for drilling, percussion drilling, and screwdriving, powered by a small DC motor, allowing for universal use in various materials without the need for multiple tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single electric hand tool is designed to perform multiple functions (drilling, screwdriving, hammering), then versatility is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal electric hand tool that combines drilling, screwdriving, and hammering functions in a single device. The tool holder is designed to accept various tool bits (drill bits, screwdriver bits, chisels) and the pneumatic impact mechanism enables both percussion drilling and hammering modes, allowing one tool to replace multiple specialized tools.
Solution Approach 2:
The patent merges previously separate functions (drilling, screwdriving, hammering) into a single integrated tool. The pneumatic impact mechanism is combined with the rotary drive system, and the tool holder accommodates multiple tool types, consolidating what would traditionally require separate tools into one unified device.
2Volume of moving object
If the rechargeable battery is housed inside the tool housing, then construction volume is reduced, but weight distribution becomes more critical
Solution Approach 1:
The rechargeable battery is nested inside the tool housing, specifically positioned in the lower section of the housing. This internal placement eliminates the need for a separate external battery pack, reducing the overall construction volume and creating a more compact, integrated tool design.
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 efficient drilling, percussion drilling, and screwdriving in multiple materials with reduced weight and size, making it suitable for both DIY and professional use, replacing the need for multiple specialized tools.
Implementation Method 1
a pneumatic impact mechanism (20) arranged behind the tool holder (18), with which impact forces can be applied in the axial direction to the tool inserted in the tool holder (18)
Implementation Method 2
a rechargeable battery (8) for powering the drive motor (6)
Data Source
Figure 1
Figure 2~4
Figure 5~9
AI summary
The machine (2) has a tool holder (18) driven by an electrical drive motor (6) over a transmission (12) in a rotating manner. A tool holder receives a tool for punching, boring or hammering, another tool for turning boring, and a third tool for screwing. A pneumatic hammer mechanism (20) applies impacts on the former tool inserted in the tool holder. A rechargeable battery (8) is provided for supplying current to the drive motor. The rechargeable battery is accommodated within a housing (4) of the machine.