Torque Extender With Bracing Dogs for Secure Attachment
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Solution Overview
Problem
Existing cheater bars for mechanical tools, such as wrenches and ratchets, often fail to securely attach to the tool handle, leading to potential damage and injury due to the lack of direct bracing against the torque direction, necessitating stronger clamping mechanisms that still rely on normal attachment forces.
Innovation Solution
A tool extender with bracing members, including center and lateral threads, that directly brace the tool against the torque direction, providing a secure attachment by using a combination of center and lateral threads to distribute force effectively, allowing for increased torque application without requiring excessive user force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a cheater bar is used to increase torque application, then the effective radius of rotation is increased and more torque force can be applied, but the connection between the cheater bar and tool handle may fail and be propelled causing damage and injury
Solution Approach 1:
The bracing mechanism is divided into multiple independent bracing members (first bracing member, second bracing member, etc.) that can be positioned at different locations around the tool handle. Each bracing member independently engages with the handle, distributing the connection load across multiple attachment points rather than relying on a single connection point, thereby preventing failure and propulsion of any single component.
Solution Approach 2:
The bracing members are strategically positioned at specific locations around the tool handle where they can directly oppose the torque direction. The bracing mechanism provides different characteristics at different locations - some bracing members may be positioned to brace against maximum torque forces while others provide secondary support, creating localized strength where needed most to prevent connection failure.
2Force
If clamping mechanisms are used to secure the cheater bar to the tool handle, then the attachment force is increased, but the attachment force is normal to the torque direction rather than directly bracing against the rotation direction
Solution Approach 1:
The bracing members are positioned asymmetrically relative to the torque direction, with at least one bracing member located at a position that is not symmetric with respect to the rotation axis. This asymmetric positioning allows the bracing members to directly oppose the torque force vector rather than applying force perpendicular to it, enabling the attachment mechanism to brace against the actual direction of rotation and improve operational efficiency.
Solution Approach 2:
The bracing mechanism transitions from a two-dimensional clamping approach (applying force normal to the torque direction) to a three-dimensional bracing approach where members are positioned at multiple angles and distances from the tool handle. This spatial arrangement allows direct opposition to the torque force vector in its full three-dimensional direction, improving the efficiency of torque application by aligning the attachment force with the actual rotational force.
Data Source
AI summary
An extension bar apparatus and methods are usable for enhancing or applying increased torque to mechanical tools, such as wrenches and ratchets, to reduce or minimize the force applied by a user to the mechanical tool for producing work. The extension bar apparatus comprises a metallic tube with a hollow on one end for receiving a mechanical tool handle, which then engages with a plurality of bracing dogs that are each perpendicular to the other and affixed to the mechanical tool through multiple threaded members, some of which extend through the inner surface to the outer surface, and wherein the application of a rotational force to the extension bar apparatus applies torque to the mechanical tool.