Right-Angle Ratcheting Wrench Drive for Confined Spaces
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Solution Overview
Problem
Conventional ratcheting socket wrenches face difficulties in confined spaces due to the need for adequate working space to apply sufficient torque, making it challenging to loosen, tighten, or free bolts or nuts located in limited areas.
Innovation Solution
A wrench rotational axis re-positioning apparatus with a housing, input and output gear assemblies in a right-angle configuration, and a ratcheting mechanism that allows the output gear assembly to rotate in either direction by manipulating an actuating lever, enabling the wrench to function effectively in tight spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional ratcheting socket wrench is used, then the wrench can loosen, tighten or free bolts or nuts, but adequate working space is required to apply sufficient torque, making it difficult to operate in confined spaces
Solution Approach 1:
The patent introduces a rotational axis re-positioning mechanism that changes the dimension of operation from linear handle movement to rotational movement about a repositionable axis. The output gear assembly rotates the socket about a second axis that can be positioned perpendicular to the original axis, allowing the handle to move in a different dimensional plane that requires less working space while still applying sufficient torque to the fastener
2Force
If the handle is moved repetitively in opposite directions to apply torque, then the socket turns in the force imparting direction, but sufficient force or torque cannot be applied when space is limited
Solution Approach 1:
By repositioning the rotational axis perpendicular to the original handle movement axis, the patent allows force to be applied in a different dimensional plane. This enables the user to apply sufficient torque to the fastener by moving the handle in a rotational path that is perpendicular to the original linear path, thereby achieving the required force application in confined spaces where the original linear movement path is blocked
Solution Approach 2:
The patent incorporates a dynamic ratcheting mechanism that can be preset in either one or the other of first and second orientations relative to the output gear assembly. This dynamic repositioning capability allows the mechanism to adapt its orientation based on the available working space, enabling force application in different directions while maintaining the ability to apply sufficient torque to the fastener
3Adaptability or versatility
If the ratcheting mechanism is preset in different orientations, then the output gear assembly can rotate in opposite directions, but the mechanism complexity increases
Solution Approach 1:
The patent combines the ratcheting mechanism and the rotational axis re-positioning mechanism into a single integrated apparatus. The ratcheting mechanism is mounted to the housing and disposed within the interior cavity, with the actuating lever extending to exterior of the housing, allowing both functions to be controlled from a single location and reducing overall system complexity
Solution Approach 2:
The ratcheting mechanism serves multiple functions: it controls the rotational direction of the output gear assembly, maintains force application during reciprocating handle movement, and can be preset in different orientations to accommodate different working space configurations. This multi-functionality reduces the need for separate mechanisms for each function, thereby reducing overall device complexity
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 apparatus allows for efficient loosening, tightening, or freeing of bolts or nuts in confined spaces by enabling rotational movement of the wrench handle, overcoming the limitations of conventional tools.
Implementation Method 1
input and output gear assemblies mounted to the housing and disposed in the interior cavity in a meshing contact with one another and rotatable about respective first and second axes arranged in a right angle configuration
Implementation Method 2
ratcheting mechanism having an actuating lever extending to exterior of the housing from the interior cavity thereof such that by manipulation of the actuating lever the ratcheting mechanism is presettable in either one or the other of first and second orientations
Data Source
AI summary
A wrench rotational axis re-positioning apparatus includes a housing, an interior cavity defined in the housing, input and output gear assemblies mounted to the housing and disposed in the interior cavity in a meshing contact with one another and rotatable about respective first and second axes arranged in a right angle configuration with one another, the input and output gear assemblies having respective input and output fittings for connection to respective drive and driven devices, and a ratcheting mechanism mounted to the housing and extending from exterior thereof into the interior cavity such that the ratcheting mechanism is presettable, or manually manipulatable, in either one of first and second orientations relative to the output gear assembly to enable the latter to correspondingly rotate in one or the other opposite direction about the second axis in response to the input gear assembly being rotated in either opposite direction about the first axis.