Multimode Hand Tool Ratchet and Right Angle Drive Integration
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Solution Overview
Problem
Conventional ratchet wrenches and right angle drives often require multiple tools for different applications, lacking a single handheld tool that can efficiently drive threaded fasteners in various modes.
Innovation Solution
A multimode hand tool with a drive head, shaft housing, shaft, handle, and ratchet mechanism that allows for three modes of operation: direct power drive, standard ratchet wrench operation, and rotational torque transfer between tool parts, utilizing a ratchet mechanism with a selector for bidirectional torque transfer and bevel gears for efficient torque transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate tools (ratchet wrenches and right angle drives) are used for different applications, then each tool can be optimized for its specific function, but the quantity of tools required increases and user convenience decreases
Solution Approach 1:
The patent combines a ratchet mechanism and a right angle drive mechanism into a single integrated hand tool. The tool features a ratchet head with a drive member that can engage fasteners directly, and simultaneously incorporates a right angle adapter mechanism with a second drive member positioned at a perpendicular angle. This merging allows the single tool to replace multiple separate tools (ratchet wrench and right angle drive), providing functional versatility while reducing the total number of tools required.
Solution Approach 2:
The hand tool is designed with universal functionality to perform multiple operations. The ratchet mechanism allows for selective torque transfer in one or both rotational directions, while the right angle adapter mechanism enables perpendicular fastener driving. The tool can adapt to different fastener orientations and driving scenarios, making it a universal solution that replaces specialized single-function tools.
2Ease of operation
If a single handheld tool integrates multiple functions, then user convenience and tool quantity are reduced, but the device complexity and structural integration increase
Solution Approach 1:
The integrated hand tool is segmented into distinct functional modules: a ratchet mechanism module, a right angle adapter module, and a handle module. Each module can independently perform its specific function while being integrated into the unified tool structure. The ratchet mechanism includes a ratchet head and drive member, the right angle adapter includes a second drive member positioned perpendicularly, and the handle provides the gripping interface. This segmentation allows complex functionality to be organized into manageable, functionally-independent sections that work together harmoniously.
Solution Approach 2:
The right angle adapter mechanism is nested within the ratchet mechanism structure. The second drive member is positioned within the housing of the ratchet mechanism, allowing the right angle functionality to be contained within the overall tool envelope. This nesting arrangement enables multiple functions to be packed into a compact, integrated structure without excessive external complexity.
3Adaptability or versatility
If the shaft housing translates between multiple positions, then multiple operational modes are enabled, but the mechanism complexity for position control increases
Solution Approach 1:
The shaft housing position control utilizes a self-service mechanism where the user's natural gripping and manipulating actions on the handle automatically control the position changes. The detent mechanism automatically engages and disengages based on the shaft housing's movement, without requiring separate control inputs. The spring-loaded detent balls automatically snap into the detent grooves at each position, providing automatic position locking and indication.
Solution Approach 2:
The detent mechanism acts as an intermediary between the shaft housing movement and the operational mode selection. The detent balls and grooves provide a mechanical interface that translates continuous shaft housing movement into discrete, stable positions. This intermediary mechanism simplifies the control complexity by providing automatic position stabilization without requiring complex control systems or multiple actuators.
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 efficient driving of threaded fasteners in multiple modes with a single tool, enhancing user convenience and reducing tool complexity by integrating multiple functions into a compact design.
Implementation Method 1
a ratchet mechanism mounted adjacent the second end of the handle and the driven end of the shaft to selectively transmit a torque between the handle and the shaft
Implementation Method 2
bevel gears engaged with each other to transmit torque from the shaft to the drive member
Implementation Method 3
a detent mechanism that is releasably engaged with a detent receiving relief on the other of the handle and the shaft housing in each of the first, second and third positions
Data Source
AI summary
A multimode hand tool is disclosed for driving a threaded fastener component in three different modes. A first mode allows a handheld power drive, such as a handheld drill/driver, to rotate a threaded fastener via the hand tool similar to a conventional right angle drive attachment. A second mode allows a user to rotate a threaded fastener by applying a torque force onto a portion of the hand tool in the same fashion as when using a standard ratchet wrench. A third mode allows a user to rotate a threaded fastener by rotating one part of the hand tool relative to another part of the hand tool.