Precision Torque Tool Clutch and Gear Mechanism
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Solution Overview
Problem
Hand-held torque wrenches often lack precision in applying torque, leading to potential over-tightening of fasteners, and existing power tools do not effectively manage variable torque settings efficiently.
Innovation Solution
A precision torque tool with a torque mechanism that includes adjustable clutch cams and a gear system, allowing for precise low and high torque settings, and an adapter for integrating with other power tools, enabling variable torque applications without over-torquing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If hand-held torque wrenches are used to tighten fasteners, then torque application is possible, but precision in torque application is insufficient leading to over-tightening
Solution Approach 1:
The patent implements a gear mechanism with variable gear ratios that allows the power tool to operate at different torque levels. By changing the gear ratio parameter, the tool can precisely control output torque to match fastener requirements, preventing over-tightening while maintaining the ability to apply sufficient torque for proper fastening.
Solution Approach 2:
The patent incorporates a clutch mechanism that provides mechanical feedback when the predetermined torque value is reached. The clutch disengages automatically when the torque threshold is exceeded, providing immediate feedback to stop further torque application and prevent over-tightening damage to the fastener.
2Productivity
If power tools are used for variable torque settings, then operational efficiency is improved, but effective management of variable torque settings is insufficient
Solution Approach 1:
The patent employs a dynamic gear shifting mechanism that allows the tool to transition between different gear ratios during operation. This dynamic adjustment capability enables the operator to efficiently switch between low and high torque settings based on the specific fastening requirements, maintaining high productivity while ensuring precise torque control.
Solution Approach 2:
The patent divides the torque output range into distinct segments through multiple gear ratios. The low gear provides precise control for low torque applications, while the high gear delivers sufficient power for high torque requirements. This segmentation allows the operator to select the appropriate gear segment for each task, improving both efficiency and ease of operation.
3Adaptability or versatility
If a single gear ratio is used in power tools, then device simplicity is maintained, but adaptability to different torque requirements is limited
Solution Approach 1:
The patent integrates multiple gear ratios within a single power tool, enabling the tool to perform both low torque precision fastening and high torque heavy-duty fastening tasks. This multi-functionality makes the tool adaptable to a wide range of applications without requiring separate tools, while the compact gear design keeps the overall device 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 tool ensures precise torque application, preventing over-tightening and allowing for adjustable torque settings between low and high values, enhancing operational safety and efficiency in applications like plumbing and assembly.
Implementation Method 1
a first clutch cam and a second clutch cam, each having cam surfaces that are engaged with one another
Data Source
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AI summary
A power tool includes a housing (302); a motor (306) supported in the housing (302); a multistage transmission (310) operably coupled to the motor (306) to receive torque from the motor (306); an output shaft (314) rotatable about a central axis (318) and operably coupled to the transmission (310) to receive torque from the transmission (310); a clutch mechanism (514) coupled to the transmission (310) and operable in a first mode, in which torque from the motor (306) is transferred to the output shaft (314) through the transmission (310), and operable in a second mode, in which torque from the motor (306) is diverted from the output shaft (314); a shift mechanism (658) coupled to the transmission (310) and operable to disable at least one stage (338, 342, 346) of the transmission (310); and a mode selector ring (634) coupled to the shift mechanism (658) to actuate the shift mechanism (658) in response to rotation of the mode selector ring (634); wherein the clutch mechanism (514) includes a resilient member (566), and wherein, in response to rotation of the mode selector ring (634), the resilient member (566) is compressible to increase the amount of torque transferred to the output shaft (314) during the first mode of operation of the clutch mechanism (514).