Offset-Angle Tool Extension With Bearing Housing for Reach and Control
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Solution Overview
Problem
Existing right-angle driver attachments for rotating power tools are cumbersome and limit the reach of the operator due to the need for manual holding at the end effector for tool alignment and operation.
Innovation Solution
An offset-angle extension device for power tools, featuring an elongated body with a power tool mounting end and an angle adapter end, a bearing housing with a handle, and a bit extension rod that connects the power tool chuck to an offset-angle adapter, allowing for angular realignment and extended reach without manual stabilization of the adapter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If flexible right-angle driver attachments are used to realign the axis of rotation, then the angle realignment capability is improved, but the operator's reach is limited due to the need for manual holding at the end effector
Solution Approach 1:
A bearing housing acts as an intermediary component between the power tool and the end effector. This housing contains a bearing that supports the extension rod, allowing the rod to rotate smoothly while maintaining angular offset. The bearing housing effectively mediates the rotational transmission while preserving the angle realignment capability and extending the operator's reach by eliminating the need for manual holding at the end effector.
Solution Approach 2:
The device is segmented into distinct functional components: a power tool mounting portion, a bearing housing containing a bearing, an extension rod passing through the bearing, and an end effector mounting portion. This segmentation allows each component to perform its specific function independently - the bearing housing provides structural support and rotational guidance, while the extension rod transmits torque and extends reach, resolving the contradiction between angle realignment and operator reach.
2Shape
If manual holding at the end effector is required to maintain tool-to-nut/bolt contact, then the angle realignment is maintained, but the operation becomes physically cumbersome
Solution Approach 1:
The bearing housing and bearing assembly create a self-supporting structure that maintains tool alignment without requiring manual intervention. The bearing automatically supports the extension rod during rotation, providing continuous stability and alignment maintenance. This self-service mechanism eliminates the need for the operator to manually hold the end effector, thereby improving ease of operation while preserving alignment stability.
Solution Approach 2:
The bearing housing serves as an intermediary that takes over the alignment maintenance function from the operator's hand. By placing the bearing within the housing, the system automatically maintains the geometric relationship between the power tool axis and the end effector axis during rotation, freeing the operator from the cumbersome task of manual alignment maintenance.
3Ease of operation
If the operator's hand is positioned at the end effector for manual contact, then tool control is maintained, but the reach of the tool is limited
Solution Approach 1:
The bearing housing acts as an intermediary control point that replaces the operator's hand position at the end effector. The operator grasps the bearing housing instead, which provides stable control through the bearing-supported rotation mechanism. This intermediary positioning allows the operator to maintain control while the extension rod transmits the rotational motion to the end effector at an extended reach distance.
Solution Approach 2:
The invention changes the spatial dimension of operator interaction by moving the control point from the end effector location to the bearing housing location. This dimensional shift in the control interface allows the operator to control the tool from a more accessible position while the extension rod bridges the spatial gap to the end effector, effectively extending reach without sacrificing control.
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 offset-angle extension device enhances the reach and re-orientates the rotational axis of power tools, reducing operator strain and maintaining stability during fastening/unfastening operations by distributing the load closer to the operator's body.
Implementation Method 1
A bearing housing with a handle is located between and connected to the power tool mounting end and the angle adapter end. The bearing housing includes a bearing that receives a bit extension rod therethrough.
Data Source
AI summary
An offset-angle extension device for a power tool includes an elongated body having a power tool mounting end and an angle adapter end. A bearing housing with a handle is located between and connected to the power tool mounting end and the angle adapter end. The bearing housing includes a bearing that receives a bit extension rod therethrough. A tool mounting rod extends from the bearing housing to the power tool mounting end and connects to the power tool. The bit extension rod extends from a chuck of the power tool, through the bearing and connects to an offset-angle angle adapter.