Cutting Depth Limiting Device With Spring-Loaded Pre-Positioning
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Solution Overview
Problem
Existing cutting depth limiting devices for portable machine tools lack convenient adjustability and automatic latching functionality, requiring separate operation of fixing elements to set cutting depths, which complicates the process and limits user convenience.
Innovation Solution
A cutting depth limiting device with a movably mounted stop element and a spring-loaded pre-positioning element that automatically transfers the fixing element into a release position, allowing for adjustable cutting depths without separate operation of the fixing element, utilizing a spring-loaded locking bolt and latching tracks for secure positioning and adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixing element is used to secure the stop element in position, then the cutting depth can be fixed securely, but the adjustment process becomes more complex and less convenient
Solution Approach 1:
The pre-positioning element automatically moves the fixing element to the release position before the user needs to adjust the stop element. This preliminary action eliminates the need for manual intervention to release the fixing element, making adjustment convenient while maintaining secure positioning during operation
Solution Approach 2:
The system uses the weight of the power tool housing itself to activate the pre-positioning element, which in turn releases the fixing element. The system serves itself by using its own operational state (housing position) to trigger the adjustment mechanism, eliminating separate fixing operations
2Manufacturing precision
If the stop element is fixed in position, then cutting depth precision is maintained, but the ability to adjust cutting depth is limited
Solution Approach 1:
The fixing element transitions between fixed and movable states based on operational needs. During normal operation, it locks the stop element for precision; during adjustment, it releases to allow repositioning. This dynamic behavior provides both precision and adaptability
Solution Approach 2:
The pre-positioning element prepares the fixing element for adjustment by moving it to the release position before the user adjusts the stop element. This ensures the fixing element is ready to release, enabling smooth adjustment while maintaining precision during cutting
3Reliability
If a separate operation is required to operate the fixing element, then secure locking is achieved, but the overall device complexity increases
Solution Approach 1:
The pre-positioning element and fixing element are combined into a single integrated mechanism. The pre-positioning element automatically activates the fixing element's release function, merging two separate operations (positioning and locking) into one unified system that reduces operational complexity
Solution Approach 2:
The system automatically manages the fixing element's state transitions using the power tool housing's own weight and position. This self-service mechanism eliminates the need for separate user operations to engage or disengage the locking function, simplifying the overall device operation
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 convenient and precise adjustment of cutting depths with automatic latching, enhancing user convenience and mobility of the stop element relative to the guide element, while ensuring secure positioning and easy operation.
Implementation Method 1
The stop unit comprises at least one spring element, which acts on the pre-positioning element with a spring force, in particular with a spring force in a direction facing away from the stop element
Data Source
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AI summary
The invention proceeds from a cutting-depth limiting device for portable power tools, having at least one cutting-depth guide unit (14) and having at least one stop unit (16) which has at least one movably mounted stop element (18) and at least one fixing element (20) for fixing the stop element (18) in at least one position. It is proposed that the stop unit (16) comprises at least one pre-positioning element (22) which subjects the fixing element (20) in at least one state to a force in the direction of a releasing position of the fixing element (20).