Hand Cutting Machine Front Miter Bearing Visibility
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Solution Overview
Problem
Hand cutting machines, such as electric hand saws or wall chasers, face difficulties in making exact cuts due to the obscured penetration and exit areas of the cutting tool, making it hard for operators to visualize these areas for precise cutting.
Innovation Solution
The hand cutting machine design positions the front miter bearing on the outer circumference or next to it, allowing the penetration and exit areas to be clearly visible, with a compact and easy-to-use configuration that includes a pivotable drive assembly and adjustable depth settings, enabling better visibility and control during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the miter bearings are arranged at a large longitudinal distance with the drive assembly between them, then the drive assembly is securely held relative to the guide element, but the penetration area and exit area of the cutting tool become difficult to see
Solution Approach 1:
The front miter bearing is repositioned from a longitudinal arrangement to a lateral arrangement relative to the cutting tool, changing the spatial dimension of bearing placement. This allows the penetration area to become visible from the front while the drive assembly remains securely positioned between the miter bearings through the longitudinal distance arrangement
2Difficulty of detecting and measuring
If the front miter bearing is arranged behind the outer circumference of the cutting tool, then the penetration area is clearly visible, but the drive assembly cannot be securely held relative to the guide element
Solution Approach 1:
The patent combines two previously separate bearing arrangements into a unified system: the front miter bearing positioned laterally next to the cutting tool for visibility, and the rear miter bearing positioned behind the cutting tool for stability. Both bearings work together to securely hold the drive assembly while enabling clear visibility of the penetration area
Data Source
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AI summary
The invention relates to a hand-held cutting machine (10) with a guide element (20), in particular a guide plate (21), which can be placed on a surface with its underside, and a drive assembly (11) comprising a drive motor (12) arranged in a machine housing (35) and a tool holder (13) for a cutting tool (14), in particular a saw blade, which can be driven by the drive motor (12) about a rotary axis (D) and which can be guided in a working direction (A) to produce a cutting cut in the workpiece, wherein the drive assembly (11) is pivotably mounted on the guide element (20) about a miter axis (GA) parallel to the working direction (A) by means of a miter bearing arrangement (30), which comprises a miter bearing (31) at the front in the working direction (A) and a miter bearing (32) at the rear in the working direction (A) at a longitudinal distance from the front miter bearing (31).the drive assembly (11) is pivotably mounted about the miter axis (GA). The front miter bearing (31) is arranged between the axis of rotation (D) of the tool holder (13) and an outer circumference (49) of the cutting tool.