Router Stop Rod Play-Free Clamping Mechanism
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Solution Overview
Problem
Existing routers suffer from inaccuracies in setting milling depth due to play between the stop support and the support table, resulting in tolerances that affect the precision of milling operations, especially when milling edges that need to seamlessly merge into the workpiece surface.
Innovation Solution
A router design where the tensioning element acts on the stop bar and is supported by an abutment element on the support table without play, ensuring a play-free connection between the stop rod and the support table, maintaining the desired milling depth regardless of forces applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the stop support is rotatably arranged on the support table with latching mounting, then the stop support can be adjusted to different positions and locked in place, but play is introduced between the stop support and the support table
Solution Approach 1:
The patent introduces a tensioning element as an intermediary component between the stop rod and the support table. This tensioning element eliminates play by creating a preloaded, rigid connection path, allowing the stop support to be adjustable while maintaining precise milling depth settings without the play introduced by rotatable mounting.
2Adaptability or versatility
If the stop carrier is rotatably mounted on the support table, then the stop carrier can be rotated to different positions, but play occurs between the stop carrier and support table during operation
Solution Approach 1:
The patent applies preliminary action by pre-tensioning the tensioning element before operation. This preloading eliminates play between the stop carrier and support table during rotational movement, ensuring that the stop rod maintains a stable, play-free position relative to the support table while the stop carrier remains rotatable for positioning adjustments.
3Measurement precision
If the tensioning element is used to brace the stop rod against the stop element, then the milling depth can be precisely set, but forces acting on the milling head cause the stop carrier to move within the play tolerance
Solution Approach 1:
The patent implements beforehand cushioning by using the tensioning element to pre-compensate for forces that will act on the milling head during operation. The preloaded tensioning element absorbs and counteracts these forces, preventing the stop carrier from moving within play tolerances and ensuring that the precisely set milling depth is reliably maintained throughout the milling process.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The surface milling cutter (1) has a supporting table (2) on which a workpiece is fixed and has a passage recess, from which guide columns protrude, on which a downward projecting and passage recess gripping milling head is slidably guided with a drive unit, during milling. During clamping, the clamping element (27) acts upon one side of the arrester bar (10) to the stopper element (21,22,23) and is supported in opposite direction on the other side on a thrust bearing element (28) arranged free of play on supporting table.