Self-Locking Fastening Tool for Deep-Cavity Bolt Assembly
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Solution Overview
Problem
The traditional method for assembling high pressure compressor rotors is inefficient due to the difficulty in accessing and manually inserting bolts into narrow, deep cavities, requiring excessive energy and time, especially with multiple bolts and irregularly shaped spaces.
Innovation Solution
A self-locking fastening tool and bolt assembling device with a simple structure, featuring a base part, top part, pressing part, lever, and transmission part, which allows for sliding fits and frictional locking, enabling the tool to push bolts upwards without continuous external force, facilitating assembly in tight spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual assembly method is used to install bolts in narrow spaces, then the worker can directly manipulate the bolt, but the assembly time and energy consumption increase significantly
Solution Approach 1:
The fastening tool is designed to perform the assembly operation automatically once positioned. The lever mechanism self-locks in the engaged position, and the bolt is pushed into place by the mechanical action of the lever returning to its neutral position, eliminating the need for continuous manual manipulation and holding.
Solution Approach 2:
The fastening tool utilizes a dynamic lever mechanism that moves between engaged and disengaged positions. The lever is spring-loaded or gravity-assisted to automatically return to its neutral position after engagement, providing the pushing force needed to insert the bolt without requiring continuous manual force.
2Ease of operation
If manual assembly method is used to install bolts in narrow spaces, then the worker can directly manipulate the bolt, but the labor intensity increases
Solution Approach 1:
The fastening tool performs the energy-intensive pushing action automatically through its mechanical design. The lever mechanism converts the worker's initial positioning effort into the force needed to push the bolt, eliminating the need for continuous manual force application.
Solution Approach 2:
The dynamic lever mechanism utilizes elastic potential energy storage and release, or gravity, to provide the pushing force. This converts a small initial input force into a larger output force during the bolt insertion process, reducing overall energy consumption.
3Device complexity
If traditional fastening tool is used without self-locking mechanism, then the structure can be simpler, but continuous external force is required to maintain positioning
Solution Approach 1:
The fastening tool incorporates a self-locking mechanism that automatically maintains the lever in its engaged position without requiring continuous external force. The self-locking feature engages passively when the lever is pushed into position, holding the bolt securely until deliberately released.
Solution Approach 2:
The self-locking mechanism utilizes the lever's own motion and geometry to create a locked state. A detent, cam, or friction-based locking feature engages automatically when the lever is in the engaged position, providing stable positioning without active force application.
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 enables efficient assembly of bolts in narrow spaces with deep cavities by allowing the fastening tool to remain self-locked, reducing labor intensity and improving assembly efficiency, while being easy to manufacture and use, even in hard-to-reach areas.
Implementation Method 1
due to a reaction force acting on the inclined transmission surface by the transmission part and the friction between the pressing part guiding matching portion and the pressing part guiding portion, the pressing part remains to be self-locked by friction
Data Source
AI summary
A fastening tool. In the fastening tool, a top part guiding matching portion engages a top part guiding portion in a sliding fit; a pressing part guiding matching portion engages a pressing part guiding portion in a sliding fit; a lever hinged to a base part; a transmission part engages a transmission part guiding slot in a sliding fit; the transmission part is driven to slide by the pressing part, and the lever is driven to rotate by the transmission part, then the top part is driven to slide out, due to a reaction force acting on the pressing part by the transmission part and the friction between the pressing part and the base part, the pressing part remains to be self-locked by friction, which can constrain the pressing part and the top part is locked.