Angled Power Tool Adapter for Rotary and Axial Impact Transfer
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Solution Overview
Problem
Existing power tools, such as rotary hammers, lack an efficient mechanism to transfer both rotation and impacts to tool bits, limiting their versatility and effectiveness in various orientations.
Innovation Solution
An adapter is designed to couple a tool bit to a power tool, featuring a transmission assembly to transfer rotary motion and an impact assembly to impart axial impacts, allowing the tool bit to rotate and reciprocate for enhanced functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a power tool uses a standard axial impact mechanism with coaxial spindle, then the structure is simple and reliable, but the tool cannot effectively work on surfaces in different orientations
Solution Approach 1:
The adapter is divided into distinct functional segments: a transmission assembly for rotary motion and an impact assembly for axial impacts. This segmentation allows each assembly to be optimized for its specific function while working together to provide multi-directional tool bit operation capability.
Solution Approach 2:
The adapter acts as an intermediary device between the power tool's drive mechanism and the tool bit. It receives rotary motion and axial impacts from the power tool and transforms them into combined rotational and reciprocating motion at an angled output, enabling the tool bit to work effectively on surfaces in different orientations.
2Adaptability or versatility
If a power tool lacks an impact mechanism, then the structure is simpler, but it cannot transfer axial impacts to the tool bit for effective breaking and chipping
Solution Approach 1:
The impact assembly merges multiple components including a wedge, cam plate, and striker into a cohesive unit that transforms axial impacts from the input shaft into reciprocating motion of the tool bit. This merging of components creates an efficient impact transfer mechanism within the adapter.
Solution Approach 2:
The impact assembly utilizes dynamic elements such as the cam plate that rotates with the input shaft and the wedge that converts rotational motion into linear reciprocating motion. These dynamic components enable the transformation of continuous rotary motion into periodic impact forces applied to the tool bit.
3Adaptability or versatility
If a power tool lacks a transmission assembly for rotary motion, then the structure is simpler, but it cannot rotate the tool bit for drilling and cutting operations
Solution Approach 1:
The transmission assembly is designed to universally transfer rotary motion from the input shaft to the output spindle while accommodating the angled orientation. This multi-functional assembly simultaneously enables drilling, cutting, and other rotary operations regardless of the work surface orientation.
4Strength
If the adapter uses rigid materials for both support frame and cover, then structural strength is higher, but the overall weight increases
Solution Approach 1:
The adapter housing applies the principle of local quality by using different materials for different components: the support frame uses a rigid first material for structural strength, while the cover uses a less rigid second material that reduces weight. This localized material selection optimizes the strength-to-weight ratio of the overall adapter structure.
Data Source
AI summary
An adapter for coupling a tool bit to a power tool including a power tool housing. The adapter including an adapter housing configured to be coupled to the power tool housing and an input shaft supported by the adapter housing and defining an input axis. The input shaft is configured to be operably coupled to the power tool to receive rotary motion and axial impacts from the power tool. The adapter further includes a spindle supported by the adapter housing along an output axis oriented at an angle relative to the input axis and a transmission assembly operably coupled to the input shaft. The transmission assembly is configured to transfer rotary motion from the input shaft to the spindle for rotation of the tool bit. Moreover, the adapter includes an impact assembly having a wedge configured to transfer axial impacts from the input shaft to the tool bit.