Rotary Power Tool Accessory With Axial Blade Feed for Cutting Rods
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Solution Overview
Problem
Existing power tools lack efficient accessories for cutting elongated members like rods and tubular members, such as PVC pipes, using rotary power tools.
Innovation Solution
A power tool accessory featuring a housing with an input shaft, a threaded shaft, a blade holder, and a workpiece holder, which allows the blade to move axially to expose or retract from the cutting position, facilitating cutting of elongated members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a power tool accessory is designed to cut elongated members, then cutting capability is improved, but device complexity increases
Solution Approach 1:
The blade holder is nested within the housing, and the blade is nested within the blade holder. The threaded shaft passes through multiple components (blade holder, workpiece holder) allowing compact arrangement of functional elements within the housing structure, reducing overall device complexity while maintaining cutting capability.
Solution Approach 2:
The accessory adapts existing rotary power tools to perform cutting operations on elongated members. The workpiece holder can accommodate different types of elongated members, and the blade can be adjusted or replaced to cut various materials, providing multi-functionality without requiring entirely new tool designs.
2Productivity
If the blade is exposed to cut the elongated member, then cutting efficiency is improved, but safety risk increases
Solution Approach 1:
The blade position is made dynamic through the threaded shaft mechanism. The blade can be advanced forward to expose the cutting edge for efficient cutting, then retracted backward to reduce exposure and minimize safety risks. This dynamic positioning allows the system to adapt between productivity and safety requirements during operation.
Solution Approach 2:
The workpiece holder acts as an intermediary between the user and the blade. It secures the elongated member in place and positions it relative to the blade, allowing the blade to be exposed for cutting while the workpiece holder maintains control and reduces direct user exposure to the sharp blade edge.
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 quick and easy cutting of elongated members using an existing rotary power tool, improving efficiency and convenience by utilizing existing power tool infrastructure.
Implementation Method 1
A threaded shaft is received in the housing and coupled to and rotationally driven by the input shaft. A blade holder, holding a cutting blade, is coupled to the threaded shaft. Upon rotation of the input shaft, the threaded shaft rotates, causing the blade holder to move axially forward along the threaded shaft
Data Source
AI summary
A power tool accessory includes a housing having a rear end portion and front end portion; an input shaft at least partially received in the rear end portion, extending along an axis, and configured to be coupled to a tool holder of a rotary power tool; a threaded shaft received in the housing and rotationally driven by the input shaft; a blade holder configured to move along the axis upon rotation of the threaded shaft; and a cutting blade configured to be retained by the blade holder. A workpiece holder is coupled to the front end portion of the housing and is configured to hold an elongated member. Upon rotation of the input shaft, the threaded shaft rotates, causing the blade holder to move axially toward the front end portion of the housing, causing the blade to move at least partially into the workpiece holder to cut the elongated workpiece.