Dual-Screw Installation Tool for Flush-Mounted Boxes
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Solution Overview
Problem
The installation of built-in parts in flush-mounted or cavity wall boxes is time-consuming and physically demanding, often resulting in installer discomfort and potential damage to the receptacles due to the need for manual alignment and screw tightening of multiple parts, which existing tools with independent motors can install at angles or unevenly.
Innovation Solution
A tool with a single drive shaft connected to two output shafts via a differential gear, allowing simultaneous rotation of screwing tool elements to fix built-in parts without the need for alternating screw tightening, and featuring adjustable torque settings and interchangeable bits to accommodate different systems, along with a contact element for secure part alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual screw tightening is used for multiple built-in parts, then alignment can be achieved, but installation time increases and physical strain on installers increases
Solution Approach 1:
The patent combines multiple screw tightening operations into a single automated tool that can tighten multiple screws simultaneously or in sequence, eliminating the need for manual alternating tightening and achieving both time savings and alignment precision
Solution Approach 2:
The tool incorporates automatic alignment features and self-centering mechanisms that enable the installation process to self-correct alignment without requiring manual intervention, thereby reducing both installation time and physical strain on installers
2Productivity
If independent motors are used for each screw tip, then simultaneous tightening is possible, but the built-in part may be installed at angles or unevenly
Solution Approach 1:
The patent employs an asymmetric mechanical linkage system where one screw tip is mechanically connected to the other through a coupling mechanism, ensuring that when one screw is tightened, the other is automatically adjusted to maintain proper alignment and prevent angular installation
Solution Approach 2:
The tool incorporates feedback mechanisms that monitor the tightening status of each screw and automatically adjust the operation to maintain proper alignment, preventing uneven installation while preserving the benefits of simultaneous tightening
3Ease of operation
If installers work in kneeling position for extended periods, then access to low-mounted boxes is improved, but health problems and physical discomfort increase
Solution Approach 1:
The patent designs the tool with an extended shaft and adjustable positioning capabilities that enable installers to operate the tool from a standing or seated position, transferring the alignment and positioning functions to the tool itself rather than requiring the installer to be in a kneeling position
Data Source
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Figure 6a~6c
AI summary
A tool (1) for fixing components, such as sockets (S), switches or dimmers, in flush-mounted or cavity wall boxes (D) is disclosed, comprising: • a tool body, • a drive shaft (3) arranged on the tool body and capable of being subjected to a drive torque, • two screw tool elements (17, 18, 22) each having an axis of rotation and oriented parallel to each other with their axes of rotation and arranged on the tool body at a distance from each other and each connected to an output shaft (11, 12), each having a free end projecting from the tool body.To achieve an improvement of such a tool, which in particular enables a more reliable fixing of components in cans, this tool according to the invention has the following: • a drive shaft (3) arranged on the tool body, which can be subjected to a drive torque, and • a transmission (6) arranged on the tool body, which connects the drive shaft (3) with the output shafts (11, 12) and couples the drive shaft (3) with the output shafts (11, 12) in such a way that a torque applied to the drive shaft (3) is transmitted to the output shafts (11, 12) to drive them in the same direction and thereby to rotate the screw tool elements (17, 18, 22) connected to the output shafts (11, 12) in the same direction about their respective axes of rotation.