Power Tool Depth Adjustment via Threaded Mechanism
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Solution Overview
Problem
Conventional routers face difficulties in finely adjusting the depth of the groove cut in a workpiece due to the need for manual handling and the lack of a precise mechanism for adjusting the moving distance of the main unit with respect to the base, making it challenging to achieve accurate and efficient cutting.
Innovation Solution
A power tool with a base, main unit, cutter, bolt, and engagement member, where the engagement member is movable between engaged and disengaged positions to adjust the distance of the main unit, allowing for precise control of the cutter's protrusion through a threaded mechanism, enabling fine adjustment of the groove depth without manual handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual handling is used to adjust the main unit position, then the device structure remains simple, but the adjustment precision deteriorates
Solution Approach 1:
A threaded rod serves as an intermediary mechanism between the main unit and base. The threaded rod converts rotational motion into linear displacement, enabling precise adjustment of the main unit position relative to the base without direct manual handling. The thread pitch determines the adjustment precision, while the mechanism remains mechanically simple.
Solution Approach 2:
The patent replaces direct manual mechanical adjustment with a threaded mechanical system. Instead of manually moving the main unit directly on the base, the threaded rod provides a controlled mechanical substitution that translates small rotational movements into precise linear adjustments, improving measurement precision while maintaining mechanical simplicity.
2Manufacturing precision
If the main unit is moved manually to adjust cutter depth, then the operation is simple, but the groove depth precision deteriorates
Solution Approach 1:
The threaded rod acts as an intermediary between the operator's rotational input and the cutter depth adjustment. By rotating the threaded rod, the operator indirectly controls the main unit position and cutter depth with high precision. The thread mechanism amplifies small rotational movements into controlled linear displacements, improving groove depth precision while keeping the operation intuitive.
Solution Approach 2:
The patent changes the parameter of adjustment precision by introducing a threaded mechanism with a specific pitch. The thread pitch determines the relationship between rotational movement and linear displacement, allowing precise control of cutter depth. This parameter change enables accurate groove depth adjustment without complicating the operational procedure.
3Adaptability or versatility
If no adjustment mechanism is provided, then the device structure remains simple, but the adaptability deteriorates
Solution Approach 1:
The patent introduces a dynamic adjustment capability through the threaded rod mechanism. The main unit can be positioned at various depths relative to the base by rotating the threaded rod, providing adaptability for different groove depth requirements. This dynamic adjustment feature is achieved through a simple threaded mechanism that adds versatility without significant structural 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
Enables precise and efficient adjustment of the groove depth, allowing for accurate cutting without the need for manual handling, improving the usability and precision of the router in cutting various depths.
Implementation Method 1
The bolt has a longitudinal axis and extends in a first direction on a first side. The bolt has a male thread. The engagement member has a female thread engaged with the male thread. When the engagement member is at the engaged position, rotation of the bolt causes the male thread to move with respect to the female thread in the first direction, thereby moving the main unit in the first direction and adjusting a distance of the main unit to the sliding surface.
Data Source
AI summary
A power tool including: a base slidable on a workpiece, and an opening provided through the base; a main unit supported to the base and movable in a first direction substantially perpendicular to the base, the main unit including an electric motor; a cutter driven by the electric motor, the cutter being capable of protruding through the opening from the base; a stopper pole supported to a housing coupled to the main unit, the stopper pole being movable in the first direction, the stopper pole having one end protruding from the housing toward the base, thereby regulating a moving distance of the cutter; a digital display unit including a moving distance detection portion for detecting a moving distance of the stopper pole and a digital display portion for displaying the moving distance; and a dust prevention member provided between a part of the stopper pole protruding toward the base and the moving distance detection portion, thereby preventing dust from entering into the housing.