Strimmer Brush With Offset Caps for Secure Mounting
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Solution Overview
Problem
Conventional brushes for brush cutters face issues with optimal accommodation and secure connection to the brush cutter interface due to their design, preventing effective attachment and operation.
Innovation Solution
The brush design features a perforated disc with offset inner cap and outer cap connection, allowing for a flat construction and increased rigidity, with recesses and dimensions optimized for secure attachment and accommodation of brush braids, and a welded connection for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional brush design is used, then the brush can be manufactured with standard construction, but the brush cannot be securely connected to the brush cutter interface
Solution Approach 1:
The patent changes the geometric parameters of the brush construction, specifically creating a flat area on the outer cap with a thickness of 3-7 mm and a bore diameter of 10-20 mm. This parameter modification allows the brush to adapt to the brush cutter interface while maintaining secure connection, resolving the contradiction between connection security and interface adaptability.
2Strength
If the brush is designed with thicker construction for strength, then the brush has higher rigidity, but the brush cannot be optimally accommodated in the brush cutter
Solution Approach 1:
The patent applies local quality by creating a flat area with specific thickness (3-7 mm) only in the connection region of the outer cap, while the rest of the brush maintains its functional structure. This localized thickening provides the necessary rigidity for secure connection without increasing the overall brush volume, thus resolving the contradiction between strength and compactness.
3Ease of operation
If the inner cap is offset to allow connection, then the brush can attach to the brush cutter, but the construction becomes more complex
Solution Approach 1:
The patent merges the inner cap and outer cap structures by offsetting the inner cap within the outer cap's flat area. The inner cap's bore is positioned offset from the outer cap's bore, allowing both caps to work together as an integrated connection system. This merging simplifies the overall attachment mechanism while maintaining the necessary complexity for secure connection to the brush cutter interface.
Data Source
Figure 1~2
Figure 3~5
AI summary
The invention relates to a brush (1) for use with a brushcutter, comprising an outer cap (4), an inner cap (5), a plurality of brush bristles (6), and a perforated disc (7) with a plurality of recesses (8) for receiving the brush bristles (6). The inner cap (5) has a bend (11) facing the outer cap (4). The outer cap (4) and the inner cap (5) each have bores (9) for engaging a connecting element (2) of the brushcutter. The perforated disc (7) has a bore (10) of such a size that the bend (11) of the inner cap (5) passes through the bore (10) of the perforated disc (7). The inner cap (5) rests with its flat surface (12) located between the offset (11) and the bore (9) of the inner cap (5) against a flat surface (13) of the outer cap (4) that is prepared for the inner cap (5).The inner cap (5) and the outer cap (4) are connected to each other in the area of their planar surfaces (12,13).