Trim Router Base With Pivoting Door Height Adjustment
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Solution Overview
Problem
Conventional hand-held power tools, such as trim routers, require complex adjustment and locking mechanisms involving multiple components, which can be cumbersome and difficult to operate.
Innovation Solution
A tool support system that integrates height adjustment and locking features into a single component, utilizing a pivoting door controlled by a manual actuator, allowing for macro and micro adjustments and locking of the power tool's height with a single component, simplifying the adjustment process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional separate components are used for height adjustment and locking, then the adjustment and locking functions can be achieved, but the device complexity and difficulty of operation increase
Solution Approach 1:
The patent combines the height adjustment function and locking function into a single integrated mechanism. The thumbwheel assembly simultaneously performs both functions: rotating the thumbwheel adjusts the height by moving the tool along the threaded rod, while the same thumbwheel also acts as a locking mechanism when positioned in the locked orientation, eliminating the need for separate adjustment and locking components.
Solution Approach 2:
The thumbwheel serves multiple functions: it acts as both the adjustment control (for height variation) and the locking control (for securing the selected height). This multi-functional design simplifies the overall mechanism by having one component perform what previously required two separate components, directly reducing device complexity while maintaining ease of operation.
2Productivity
If multiple separate components are used for adjustment and locking, then the functions are achieved, but the number of components and operational steps increase
Solution Approach 1:
By merging the adjustment and locking operations into a single thumbwheel control, the patent eliminates the need for multiple operational steps. The user can adjust the height and lock it in one continuous motion without releasing the control or switching between different components, thereby reducing the time required for height adjustment and improving operational productivity.
3Device complexity
If a single component performs both adjustment and locking, then the device complexity is reduced, but the force required to lock may increase
Solution Approach 1:
The patent replaces a purely mechanical friction-based locking system with a threaded mechanical advantage system. The threaded rod and thumbwheel create a mechanical advantage that allows the user to secure the tool at the selected height with minimal force. The threads convert rotational motion into linear clamping force, providing a self-locking mechanism that maintains the selected height without requiring excessive manual force.
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 system allows for easy and precise adjustment and locking of the power tool's height, enhancing user convenience and reducing the complexity of adjustment mechanisms, while providing secure locking to maintain the selected height.
Implementation Method 1
A height adjustment mechanism includes a thumbwheel driven threaded shaft disposed between the door and the bearing flange and configured to threadedly engage the threaded half-bore in the bearing flange when the door and the bearing flange are directly adjacent such that rotation of the threaded shaft adjusts the height of the elongated body of the power tool relative to the base
Implementation Method 2
the tool support includes a force generating component that generates a different force corresponding to the position of the actuator, with one force operable to push the door directly adjacent the bearing flange to form the threaded bore, and a greater force operable to squeeze the threaded shaft between the half-bores sufficiently to prevent vertical movement of the power tool relative to the base
Data Source
AI summary
A tool support incorporates height adjustment and locking features in common components. A pivoting door is used to control the engagement of a height adjustment threaded shaft with the bearing flange of the power tool, with the position of the pivoting door controlled by a manual actuator. In one position the manual actuator allows the door to pivot outward to disengage the height adjustment shaft from the bearing flange. In a second position the manual actuator moves the door to engage the height adjustment shaft with the bearing flange to permit “micro” height adjustment by rotation of the height adjustment shaft. In a third position the manual actuator presses the door into the height adjustment shaft to effectively lock the shaft in position.