Worm Drive Barring Attachment for Precise Engine Positioning
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Solution Overview
Problem
Current methods for maintaining or repairing large industrial engines require excessive physical strength, are inaccurate, difficult to hold in place, and pose safety concerns due to reliance on large pry bars and brute force techniques for rotating internal components.
Innovation Solution
A barring device attachment featuring a right-angle worm drive reducing gearbox with an input shaft and output shaft connected by a shear bolt, driven by various tools, including drills and ratchets, which includes a base plate, mounting plate, and a barring device with a flange adapter and drive bolt, allowing precise rotational movement of engine components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If large pry bars and brute force methods are used to rotate internal engine components, then physical strength requirement increases, but positioning accuracy deteriorates and safety concerns increase
Solution Approach 1:
The patent replaces brute force mechanical methods (pry bars) with a worm drive gearbox mechanism that provides mechanical advantage through gear reduction. The input shaft connects to a worm gear that drives the output shaft, enabling precise rotational positioning of engine components with minimal applied force while maintaining high positioning accuracy through the inherent self-locking and reduction properties of the worm drive system.
Solution Approach 2:
The patent changes the mechanical parameters by introducing a gear reduction system that transforms high-speed, low-torque input rotation into low-speed, high-torque output rotation. This parameter transformation allows operators to achieve the same rotational effect with significantly reduced physical effort while improving positioning precision through controlled, incremental rotation steps provided by the gear mechanism.
2Force
If large pry bars and brute force methods are used to rotate internal engine components, then physical strength requirement increases, but operational stability deteriorates
Solution Approach 1:
The patent replaces unstable brute force methods with a stable worm drive gearbox system where the worm gear engages with the output gear to provide controlled, consistent rotational movement. The self-locking nature of the worm drive prevents back-driving and maintains positional stability, while the rigid gear meshing ensures operational consistency without requiring continuous physical force application.
3Force
If large pry bars and brute force methods are used to rotate internal engine components, then physical strength requirement increases, but safety deteriorates
Solution Approach 1:
The patent eliminates safety hazards associated with brute force methods by replacing pry bars with a controlled gear-driven system. The worm drive mechanism provides inherent safety through its self-locking feature that prevents uncontrolled rotation, and the enclosed gearbox protects operators from flying debris or component failure. The system allows precise control of rotational force, preventing over-torquing and component damage.
Solution Approach 2:
The patent incorporates protective features in advance, including the shear bolt mechanism that prevents catastrophic failure by shearing under excessive load, and the enclosed gearbox structure that protects against debris and accidental contact. These beforehand cushioning measures eliminate safety concerns before they can manifest during operation.
4Measurement precision
If a worm drive reducing gearbox is used to enable precise rotational movement, then positioning precision improves, but device complexity increases
Solution Approach 1:
The patent applies a universal worm drive gearbox design that can be adapted to various engine types and applications. The standardized input and output shaft configurations allow the same basic mechanism to serve multiple functions across different maintenance tasks, justifying the added complexity through versatility and repeatability. The gearbox becomes a multi-functional tool that handles various rotational positioning requirements.
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 easy and precise positioning of internal engine components, reducing the need for physical strength and minimizing safety risks, while protecting against over-torque damage through the shear bolt mechanism.
Implementation Method 1
A first embodiment of the present invention provides for a barring device attachment comprises a right-angle worm drive reducing gearbox which has an input shaft and an output shaft
Implementation Method 2
The shear bolt connects the drive socket to the output shaft. The shear bolt may protect the barring device attachment against damage due to over torque conditions
Implementation Method 3
The barring device which has a flange adapter completed with a drive bolt, an engagement spring, and a drive gear
Implementation Method 4
The right-angle worm drive reducing gearbox may be filled with a lubricant to reduce friction and wear of the worm gear, the main output gear, the input shaft bearings and the output shaft bearings during operation
Data Source
AI summary
A barring device attachment includes a right-angle worm drive gear box configured to accommodate mechanical input from an electric drill. The attachment is particularly suited to mount to an engine to arrest rotational motion thereof in order to provide maintenance thereon.