Battery-Powered Pipe Threader With BLDC Drive and Auto Lubrication
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Solution Overview
Problem
Portable pipe threaders often require a remote power source and manual lubrication, limiting their portability and efficiency, as they rely on AC motors that heat up during use and need continuous power and lubrication to function effectively.
Innovation Solution
A portable pipe threader equipped with a brushless direct current (BLDC) motor and a battery pack for power, along with an integrated lubrication system, allowing for self-contained operation and adjustable torque and speed control via a pedal or electronic switch, enabling efficient and portable pipe threading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If AC motor with remote power source is used, then continuous power supply is available, but portability is reduced and device complexity increases
Solution Approach 1:
The patent replaces the AC motor with a brushless direct current (BLDC) motor that operates on DC power from a battery pack. This substitution eliminates the need for AC power infrastructure, enabling portable operation while maintaining sufficient power output for pipe threading applications.
Solution Approach 2:
The patent extracts the motor and power supply system from the traditional AC-powered configuration with remote power source, creating a self-contained portable unit with integrated BLDC motor and battery pack. This extraction enables the device to operate independently without external power infrastructure.
2Force
If AC motor is used, then sufficient torque is available, but motor heats up during continuous use
Solution Approach 1:
The patent replaces the AC motor with a BLDC motor that provides equivalent or superior torque output while generating less heat during continuous operation. The BLDC motor's efficiency and cooling characteristics resolve the heating issue while maintaining the required force for pipe threading.
3Device complexity
If manual lubrication is used, then device complexity is reduced, but operational efficiency decreases and operator workload increases
Solution Approach 1:
The patent implements an automatic lubrication system that self-regulates to provide lubricant to the die during operation. This self-service approach eliminates the need for manual lubrication intervention while maintaining optimal lubrication levels, thereby improving operational efficiency without proportionally increasing device complexity.
4Productivity
If onboard lubrication system is added, then operational efficiency is improved, but device complexity and weight increase
Solution Approach 1:
The automatic lubrication system operates autonomously with minimal control mechanisms, providing efficient lubrication delivery without requiring complex control systems. The system self-regulates lubricant flow based on operational conditions, improving productivity while keeping the added complexity manageable.
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
The solution provides a portable, efficient, and self-sufficient pipe threading solution by using a BLDC motor and battery pack for power and an integrated lubrication system, enhancing portability and reducing the need for external power and manual lubrication, thus improving operational efficiency and convenience.
Implementation Method 1
a brushless direct current motor operable to provide torque to one of the pipe or a selected one of the pipe threading tools
Implementation Method 2
an integrated lubrication system, allowing for self-contained operation and adjustable torque and speed control
Data Source
AI summary
A portable pipe threader includes a stand upon which a pipe is supported, a carriage supported by the stand, a spindle mounted to the carriage for clamping the pipe against rotation such that the pipe is stationary, a plurality of pipe threading tools coupled to the carriage and selectively operable to perform work on the pipe, a drive assembly including a plurality of brushless direct current (BLDC) motors. Each of the plurality of BLDC motors is mounted to one of the plurality of pipe threading tools and is operable to provide torque to a corresponding one of the plurality of pipe threading tools to rotate the corresponding one of the plurality of pipe threading tools relative to the pipe. A battery pack is supported by the stand and in selective electrical communication with the plurality of BLDC motors to provide electrical power to the plurality of motors.