Tabletop Cutting Machine Miter Adjustment Rack-and-Pinion Layout
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Solution Overview
Problem
Existing tabletop cutting machines face difficulties in easily and accurately adjusting the miter angle of the turntable due to cumbersome operation mechanisms, limited adjustability, and durability issues with the rack and pinion systems.
Innovation Solution
A cutting machine design featuring a fine angle adjuster with a rack located on the base and a pinion within the table body, where the operation part can directly or indirectly engage with the rack, allowing for precise adjustment of the turntable's rotation angle and incorporating a clutch mechanism to prevent power transmission at higher torques, enhancing durability and ease of operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the adjustment screw is located relatively far from the rotation center of the turntable, then the position of the adjustment screw changes greatly as the turntable rotates, but this makes the adjustment screw not easy to operate
Solution Approach 1:
Instead of placing the adjustment mechanism at the periphery (far from rotation center), the patent places the adjustment screw and associated mechanisms closer to the rotation center of the turntable. This inversion of the conventional arrangement keeps the adjustment components within a compact, easily accessible area that does not experience large positional changes during rotation, thereby maintaining both precision and ease of operation.
2Measurement precision
If both the fixing handle and the adjustment screw are to be operated to finely adjust the miter angle, then the miter angle can be adjusted, but this causes time-consuming operations
Solution Approach 1:
The patent combines the fixing handle and adjustment screw operations into a single integrated mechanism. The adjustment screw is designed to work in conjunction with the fixing handle such that one operational sequence accomplishes both the fine adjustment and the securing of the miter angle, eliminating the need for separate operations and reducing the time required for precise angle setting.
Solution Approach 2:
The fixing handle is designed to preliminarily position and secure the turntable at a desired miter angle before the adjustment screw is used for fine-tuning. This preliminary action establishes a stable base position, allowing the subsequent fine adjustment to be performed quickly and accurately without requiring multiple iterative operations.
3Ease of operation
If the rack is located on the turntable, then the fine angle adjuster can be implemented, but the rack may deform due to turntable deformation, reducing durability
Solution Approach 1:
The patent extracts the rack from the turntable structure and relocates it to the base. This separation removes the rack from the deforming turntable component, placing it instead on the stable base that does not undergo rotational deformation. The pinion remains on the turntable, but by taking out the rack from its vulnerable position, the system maintains fine adjustment capability while significantly improving the durability and reliability of the rack-and-pinion engagement.
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 solution enables easy and precise adjustment of the miter angle, improving operational efficiency and extending the lifespan of the machine by reducing wear on critical components.
Implementation Method 1
a rack located on the base, a pinion located in the table body within an area of the table body as viewed from above, and engageable with the rack directly or indirectly
Data Source
AI summary
An easily operable, highly durable cutting machine finely adjusts the miter angle of a turntable. A cutting machine includes a turntable supported in a manner rotatable horizontally to a base and including a substantially disk-shaped table body to receive a workpiece and a table extension protruding forward from the table body, a cutting machine body located above the turntable and connected in a manner swingable vertically to the turntable, and a fine angle adjuster that adjusts a rotation angle of the turntable with respect to the base and including a rack on the base, a pinion located in the table body within an area of the table body as viewed from above and engageable with the rack directly or indirectly, and an operation part operable to rotate the pinion.