Miter Saw Support Extension Locking for Stable Workpiece Support
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Solution Overview
Problem
Existing chop and pull saws face challenges in securely supporting workpieces during machining due to bulky and easily misplaced support blocks, and existing solutions either compromise on stability or are cumbersome to detach and reattach.
Innovation Solution
A chop and pull saw design featuring support extensions with a connecting web that can be inserted into a recess on the lower table for secure attachment, and a safety device with an elastically pretensioned securing element that prevents unintentional detachment, allowing for easy connection and quick release without additional tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If support blocks are attached to the lower table using separate form-fitting elements, then the workpiece support stability is improved, but the device complexity and transport difficulty increase due to bulky and unwieldy support blocks
Solution Approach 1:
The support block and form-fitting element are merged into a single integrated component. The support block contains an integrated form-fitting element that engages with the lower table, eliminating the need for separate attachment components and reducing overall structural complexity while maintaining stability.
Solution Approach 2:
The support block is designed with a detachable connection mechanism that allows it to be divided into separable parts for transport, yet functions as a unified stable structure during operation. This segmentation enables easy attachment and detachment without requiring complex tools or procedures.
2Ease of operation
If support blocks are made detachable for transport convenience, then the ease of operation is improved, but the reliability decreases due to risk of forgetting support blocks during transport
Solution Approach 1:
The support block is permanently integrated with the lower table through a built-in form-fitting connection that cannot be easily lost or forgotten. The unified design ensures the support block remains attached during transport unless deliberately removed through a simple detachment mechanism.
3Ease of operation
If the connecting web is designed to be easily pulled out for detachment, then the ease of operation is improved, but the reliability worsens due to unintentional release
Solution Approach 1:
The form-fitting element is designed with a geometry that prevents accidental detachment by requiring a specific deliberate action to disengage. The connecting features include interference fits or mechanical interlocks that resist unintended pulling forces while allowing controlled removal when needed.
4Device complexity
If the support extension is made compact for transport, then the device complexity is reduced, but the functionality worsens due to limited support extension length
Solution Approach 1:
The support extension is designed to be dynamically adjustable, allowing it to extend to various lengths depending on the workpiece requirements. During transport, it remains in a compact retracted position, but during operation, it can be extended to provide the necessary support length, achieving both compactness and adaptability.
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 provides a compact, stable, and secure support system for workpieces, enabling easy transport and reliable support during machining, with the ability to detach and reattach the support extensions quickly and easily, enhancing user convenience and safety.
Implementation Method 1
a safety device with an elastically pretensioned securing element that prevents unintentional detachment
Data Source
Figure 1~2
Figure 3a~3b
Figure 3c~4a
AI summary
The invention relates to a miter and pull saw (10) with a base table (12) for receiving and supporting a workpiece (W) to be machined, wherein the base table (12) comprises at least one support extension (20) with a support section (26) which serves to receive and support the workpiece (W) to be machined, wherein the support extension (20) is movable back and forth between a retracted position and an extended position relative to the base table (12) and for this purpose has at least one connecting web (22) which can be inserted at least partially into a corresponding recess (50) on the base table (12) to connect the support extension (20) to the base table (12) and can be completely withdrawn from it to release the connection.According to the invention, the support extension (20) further comprises a locking device for securing the support extension against an unintentional extension movement of the connecting web out of the corresponding recess on the base table (12), wherein the locking device comprises a movable locking element which is elastically pre-tensioned in the direction of a locking position, wherein the locking element in the locking position engages a locking edge in the area of the recess on the base table and thereby prevents an unwanted extension movement of the connecting web.