Pulley Fastening Assembly for Simultaneous Multi-Bolt Torqueing
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Solution Overview
Problem
The periodic maintenance of semiconductor facilities involves the time-consuming task of fastening and loosening numerous bolts, often requiring uniform pressure distribution across the work piece, which is difficult to achieve with existing technologies.
Innovation Solution
A fastening device with a support portion, pulleys, and fastening tools connected by connection portions, driven by a motor to vary the distance between fastening tools, allowing simultaneous fastening and loosening of bolts at various radii.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple bolts are fastened individually during periodic maintenance, then each bolt can be torqued to specification, but the work time increases significantly
Solution Approach 1:
The patent combines multiple fastening tools (first fastening tool and second fastening tool) into a single integrated device that can operate simultaneously on multiple bolts. The support portion with multiple connection portions allows the device to engage multiple bolts at different radii concurrently, thereby reducing total maintenance time while maintaining torque specifications through synchronized operation controlled by a single motor
2Productivity
If a single fastening tool is used for multiple bolts, then the device structure is simple, but it cannot achieve simultaneous fastening of bolts at various radii
Solution Approach 1:
The device is segmented into multiple independent connection portions (first connection portion, second connection portion, etc.) that can be positioned at different radii around the workpiece. Each connection portion can independently engage a bolt while being driven by a single motor through the pulley system, enabling simultaneous multi-point fastening without requiring multiple separate tools
3Stress or pressure
If bolts are fastened sequentially to achieve uniform pressure distribution, then pressure uniformity can be maintained, but the processing time increases
Solution Approach 1:
The device employs a dynamic pulley system where the first pulley, second pulley, and third pulley can rotate independently to adjust the position and timing of each fastening tool. This dynamic adjustment capability allows multiple bolts to be fastened simultaneously while maintaining uniform pressure distribution through coordinated rotation and synchronized tool engagement
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
This solution reduces the work time required for fastening and loosening bolts and ensures a uniform pressure distribution across the work piece, enhancing efficiency in semiconductor facility maintenance.
Implementation Method 1
a motor connected to the first pulley, wherein a force generated by the motor and provided to the first pulley is at least partially transmitted to the second pulley and the third pulley to vary a distance between the first fastening tool and the second fastening tool
Implementation Method 2
a first pulley, a second pulley, and a third pulley rotatably disposed on the central portion, the first end portion, and the second end portion, respectively
Implementation Method 3
a motor generating a force for rotating the first pulley, the second pulley, and the third pulley, wherein the force generated by the motor simultaneously rotates the first fastening tool and the second fastening tool relative to the support portion
Data Source
AI summary
A fastening device includes: a support portion including a first end portion, and a second end portion, and a central portion between the first and second end portions; a first pulley, a second pulley, and a third pulley rotatably disposed on the central portion, the first end portion, and the second end portion, respectively; a first connection portion and a second connection portion respectively rotatably disposed on the first and second end portions and respectively connected to the second and third pulleys; a first fastening tool and a second fastening tool respectively connected to the first and second connection portions; and a motor connected to the first pulley, wherein a force generated by the motor and provided to the first pulley is at least partially transmitted to the second and third pulleys to vary a distance between the first and second fastening tools.