Adjustable Stop Latching Mechanism for Dowel Milling Tools
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Solution Overview
Problem
Existing hand-held power tools with pawl-like adjustment stops are cumbersome to operate due to difficulty in fixing them in inactive positions behind the front stop surface, leading to inefficient handling.
Innovation Solution
The implementation of a latching mechanism for adjustment stops that allows them to be easily locked in various positions relative to the stop surface, including the rest and stop positions, using a guide arrangement and a release device to simplify operation, enabling easy adjustment and locking of multiple stops on both sides of the cutting tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pawl-like adjustment stops are used in hand-held power tools, then the stops can be positioned in front of or behind the front stop surface, but the stops cannot be easily fixed in their inactive position behind the stop surface, requiring additional fastening elements like screws or clamps
Solution Approach 1:
The adjustment stop is designed to be movable along its movement curve, allowing it to transition between active and inactive positions. The latching device dynamically engages with the stop at specific positions along its path, enabling easy positioning without permanent fastening elements. This dynamic design eliminates the need for screws or clamps while maintaining secure positioning.
Solution Approach 2:
A latching device acts as an intermediary between the adjustment stop and the stop device housing. This latching mechanism temporarily secures the stop in its inactive position behind the front stop surface, providing easy fixation without requiring additional fastening elements. The latching device engages with a latching recess in the stop, creating a simple yet effective fixing solution.
2Manufacturing precision
If multiple adjustment stops are provided on both sides of the cutting tool, then transverse distances can be precisely set for milling or drilling tasks, but the handling and operation of the tool becomes more complex
Solution Approach 1:
Each adjustment stop is equipped with its own latching device that automatically engages when the stop is positioned in its inactive location behind the front stop surface. This self-latching mechanism eliminates the need for manual fastening operations, allowing operators to easily set multiple stops without increasing operational complexity. The stops serve themselves by automatically securing in place through the latching mechanism.
Data Source
Figure 1~2
Figure 3
Figure 4~5b
AI summary
The invention relates to a hand-held machine tool (10), in particular a dowel milling machine, with at least one cutting tool (13) for drilling and/or milling a recess in a workpiece front side (F) of a workpiece (W), with a stop device (20) for contact with the workpiece (W), which has a front stop surface (21), and with at least one adjustable stop (110) arranged at a transverse distance to the tool, which is movably mounted between a stop position (A), in which the adjustable stop (110) projects in front of the front stop surface (21), and a rest position (R), in which the at least one adjustable stop (110) does not project in front of the front stop surface (21) or is moved back behind the front stop surface (21).The hand-held machine tool (10) is provided to have a locking device (140) for locking the at least one adjustment stop (110) in at least one position of the at least one adjustment stop (110) relative to the front stop surface (21).