Hand-Held Sawing Machine Scorer Grip for Better Handling Comfort
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Solution Overview
Problem
Handheld machine saws with scoring assemblies are uncomfortable to handle due to additional forces acting on the operator during scorer operation.
Innovation Solution
Incorporating a scorer handle body on the upper side of the guide device opposite to the guide surface, allowing the operator to exert force in the direction of the guide surface to compensate for forces originating from the scoring tool, and providing separate depth setting bearings for the saw and scorer tools to adjust penetration depth independently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the scoring assembly is added to the handheld machine saw, then the capability to introduce scores upstream of saw cuts is improved, but the handling comfort deteriorates due to additional forces acting on the operator
Solution Approach 1:
The machine saw is divided into functionally independent segments: the saw assembly with its own handle and the scoring assembly with its own separate handle body. This segmentation allows each assembly to be controlled independently, reducing the operational complexity and improving handling comfort while maintaining both scoring and sawing capabilities.
Solution Approach 2:
The handle body for the scoring assembly is positioned in a different spatial dimension (another dimension) relative to the main saw handle. Specifically, the scoring handle body is arranged on the upper side of the guide device, providing an additional control point that distributes the forces and improves ergonomics without interfering with the primary sawing operation.
2Adaptability or versatility
If the scoring tool is positioned to protrude in front of the guide surface, then the ability to introduce scores upstream of saw cuts is improved, but the precision of depth control deteriorates
Solution Approach 1:
The scoring tool is configured to perform preliminary action by introducing scores upstream of the actual saw cut. The scoring tool protrudes in front of the guide surface to create guide grooves in the workpiece before the saw blade arrives, ensuring precise positioning and preventing material splitting during the subsequent sawing operation.
Solution Approach 2:
The scoring toolholder is movably mounted on the guide device by means of a scorer depth setting bearing, allowing dynamic adjustment of the scoring tool's penetration depth. This movable mounting enables precise depth control while maintaining the ability to position the scoring tool in front of the guide surface for upstream scoring operations.
3Ease of operation
If separate handle bodies are provided for scoring and sawing operations, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The handle body for the scoring assembly serves multiple functions: it provides a control point for the scoring operation, acts as a structural support for the scoring toolholder, and contributes to the overall ergonomic design. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity despite the addition of separate control handles.
Data Source
AI summary
A mobile hand-held sawing machine having: a sawing assembly (11), which has a sawing tool holder (14) for a sawing tool (15) and a saw drive motor (12) for driving the sawing tool holder (14); and a guide device (17), which has a guide body (18) having a guide face (19), extending along a longitudinal axis (L), for guiding the hand-held sawing machine (10) in a working direction (AR) on a workpiece (W); the hand-held sawing machine (10) having a pre-cutting assembly (31), which is arranged on the guide device (17) in front of the sawing assembly (11) in relation to the working direction (AR) in a longitudinal position in relation to the longitudinal axis (L) and has a pre-cutter tool holder (34) for a pre-cutting tool (35) and a pre-cutter drive (32A) for driving the pre-cutter tool holder (34).