Rotatable Cutting Depth Limiting Element with Axial Fixation
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Solution Overview
Problem
Existing cutting depth limiting devices for portable machine tools often cause imbalance and are difficult to set accurately, leading to potential damage from exceeding maximum cutting depth, especially when working with hard materials like metal or concrete.
Innovation Solution
A cutting depth limiting device with a stationary limiting element that can be rotatably mounted on a machine tool functional unit, featuring an axial fixation collar and anti-rotation collar with locking cams, allowing for secure axial and rotational positioning to set a maximum cutting depth without causing imbalance, and featuring circular ring segments for varied depth settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the limiting element is attached to the machining tool, then the cutting depth can be limited, but it causes imbalance in the machining tool
Solution Approach 1:
The patent introduces a machine tool functional unit as an intermediary component between the limiting element and the machining tool. The limiting element is attached to this functional unit rather than directly to the machining tool, thereby preventing imbalance in the machining tool while still achieving cutting depth limitation. The functional unit acts as a mediator that carries the limiting element without transmitting imbalance to the machining tool.
2Stability of the object's composition
If the limiting element is attached to the machine tool functional unit, then tool balance is maintained, but the setting of maximum cutting depth becomes difficult
Solution Approach 1:
The patent makes the limiting element rotatable relative to the machine tool functional unit, allowing dynamic adjustment of the maximum cutting depth setting. This rotational capability enables the operator to easily set different cutting depths by rotating the limiting element to different angular positions, while the element remains securely attached to the functional unit during operation.
Solution Approach 2:
The patent incorporates a locking mechanism that secures the limiting element in a predetermined rotational position after setting. This preliminary locking action ensures that once the maximum cutting depth is set by rotation, the element remains fixed in that position during machining operations, making both the setting process and the operational stability straightforward.
3Reliability
If the limiting element is made stationary relative to the machine tool functional unit during machining, then cutting depth limitation is reliable, but adjustment of maximum cutting depth requires disassembly
Solution Approach 1:
The patent enables the limiting element to be rotated relative to the machine tool functional unit while maintaining secure attachment through a locking mechanism. This allows the operator to adjust the maximum cutting depth by rotating the element to different positions and then locking it in place, eliminating the need for disassembly while ensuring reliable cutting depth limitation during machining.
Data Source
Figure 1~2
Figure 3~4
AI summary
The cutting depth limiting device (10) has an oscillating drivable spindle which is provided with a machine tool function unit (14) attachable to the stationary limiting element (16). The limiting element mounted on the machine tool function unit, is rotatable for setting the maximum cutting depth on the machine tool function unit. The limiting element has axial fixation collar (18) which is arranged at the axial fixation element (20) for axial securing of limiting element in an assembled state. An independent claim is included for tool system.