Reaction Adaptor for Torque Tools with Adjustable Abutment
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Solution Overview
Problem
Existing reaction fixtures for torque power tools are limited in adjustability, leading to increased costs and safety concerns due to the need for custom fixtures, and they often fail to transfer reaction forces to the ideal abutment point, causing twisting and fastener-bending forces that can result in tool instability and inefficiency.
Innovation Solution
The development of reaction adaptors that include a first force-transmitting element rotatable about the tool's turning force axis and a second force-transmitting element that is either rotatable or extensible, allowing for adjustable abutment against stationary objects at the ideal pressure point, reducing twisting and fastener-bending forces and enabling portability without the need for custom fixtures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If present reaction fixtures are used with fixed orientation, then tool functionality is limited and multiple tools are needed, but device complexity and cost increase
Solution Approach 1:
The reaction fixture incorporates a movable mounting mechanism that allows the reaction force transmitting element to be repositioned along the housing in multiple directions. This dynamic adjustment capability enables a single tool to adapt to various stationary object locations, eliminating the need for multiple fixed-orientation tools and reducing overall device complexity
Solution Approach 2:
The reaction fixture is designed with universal adjustability features including movement along the longitudinal axis, transverse direction, and rotation about the turning force axis. This multi-functional design allows one tool to perform the function of multiple specialized tools, improving versatility while reducing the total number of devices required
2Ease of operation
If reaction fixtures are connected about the turning force axis, then complete rotation is allowed, but abutment is limited to coaxial locations only
Solution Approach 1:
The reaction fixture mounting mechanism adds dimensional freedom by allowing movement not only about the turning force axis but also along the longitudinal axis and in transverse directions. This multi-dimensional adjustability expands abutment locations from a single coaxial point to multiple positions in three-dimensional space, while preserving rotation freedom
3Adaptability or versatility
If reaction fixtures are connected at the housing, then abutment against various locations is possible, but complete rotation of tool housing is prevented
Solution Approach 1:
The reaction fixture incorporates a dynamic mounting system that allows the reaction force transmitting element to be repositioned along the housing in multiple directions. This dynamic adjustability enables the fixture to accommodate various abutment locations while allowing complete rotation of the tool housing about the turning force axis, as the fixture can be repositioned to maintain proper alignment during rotation
4Ease of manufacture
If reaction force is transferred to non-ideal abutment points, then twisting and fastener-bending forces increase, but tool stability decreases
Solution Approach 1:
The reaction fixture includes adjustment mechanisms that allow operators to position the reaction force transmitting element to abut against stationary objects at the ideal pressure point. By providing feedback through adjustable positioning along the longitudinal axis, transverse direction, and rotation, the system enables proper force transfer that minimizes twisting and fastener-bending forces, thereby maintaining tool stability and reliability
Data Source
AI summary
Apparatus for tightening or loosening fasteners pneumatically, electrically, hydraulically and manually driven are disclosed, and in one example includes: a receiving member, rotatably supported in the apparatus for tightening or loosening, for receiving the fastener; a device for effecting rotation of the receiving member to tighten or loosen the fastener; and an apparatus which transfers a reaction force during tightening or loosening of the fasteners. The apparatus which transfers a reaction force includes: a first force-transmitting element rotatably attachable about a turning force axis of the device for effecting rotation; and a second force-transmitting element either rotatably attachable about, extensibly and retractably attachable along, or rotatably attachable about and extensibly and retractably attachable along at least a portion of the first element.