Lawn Mower Cutting Disc Mounting for Fast Height Adjustment
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Solution Overview
Problem
Conventional lawn mowers require complex and cumbersome processes for adjusting grass cutting height, involving multiple components and spacers, which are time-consuming and costly to manufacture.
Innovation Solution
A lawn mower cutting disc with a radial extension and a connection portion that allows for easy adjustment of grass cutting height through a coupling member engaging with multiple engagement plateau arrangements, enabling secure and reliable positioning in different mounting positions without the need for additional parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional means for adjusting cutting height are used (multiple components, spacers, wheels, or rollers), then the cutting height can be adjusted, but the device complexity increases and manufacturing costs increase
Solution Approach 1:
The patent combines the cutting disc and the adjustment mechanism into a single integrated unit. The cutting disc itself is designed with multiple mounting positions that directly engage with the drive shaft, eliminating the need for separate spacers, wheels, or rollers. This merging of functions reduces the number of components while maintaining cutting height adjustability.
Solution Approach 2:
The cutting disc serves multiple functions: it performs the primary cutting function and simultaneously provides the height adjustment mechanism through its integrated mounting positions. This multi-functionality eliminates the need for dedicated adjustment components, reducing overall device complexity while maintaining adaptability.
2Adaptability or versatility
If spacers are inserted or removed between the cutter blade and drive shaft to adjust cutting height, then the cutting height can be changed, but the operation becomes time-consuming and cumbersome
Solution Approach 1:
The adjustment mechanism is merged into the cutting disc structure itself, with multiple mounting positions directly formed on the disc. This eliminates the need for separate spacer components that must be inserted and removed, allowing for rapid height adjustment by simply repositioning the cutting disc to a different mounting position.
Solution Approach 2:
The mounting positions are pre-configured on the cutting disc during manufacturing, with engagement features that align with corresponding features on the drive shaft. This preliminary preparation allows the user to quickly switch between heights without requiring complex assembly operations or stored spacer components.
3Adaptability or versatility
If multiple components are used for cutting height adjustment, then the cutting height can be adjusted, but the manufacturing cost increases
Solution Approach 1:
The cutting disc and height adjustment mechanism are manufactured as a single integrated component. The multiple mounting positions are formed directly on the disc during the disc manufacturing process, eliminating the need to manufacture and assemble separate spacers, wheels, or rollers. This reduces part count, simplifies manufacturing, and lowers costs.
Solution Approach 2:
The cutting disc is designed to perform both the cutting function and the height adjustment function through its integrated mounting positions. This multi-functionality eliminates the need for dedicated adjustment components, reducing the total number of parts that need to be manufactured, inventoried, and assembled, thereby reducing manufacturing costs.
Data Source
Figure 1A~1B
Figure 2A
Figure 2B
AI summary
The present disclosure relates to a lawn mower (100) comprising a cutter propulsion unit (165), a transmission axle (166, 166') that has a longitudinal extension (L, L') and is adapted to be rotated by the cutter propulsion unit (165). The lawn mower (100) further comprises a cutting disc (160) that has a radial extension (R) that runs between a center (182) and an outer edge (181), where the cutting disc (160) comprises one or more cutting edges (161, 162, 163) that are adapted to cut grass when the cutting disc (160) is brought into a rotational motion by means of the transmission axle (166). The cutting disc (160) further comprises a connection portion (164, 164') which is adapted to receive a coupling member (173, 173'), comprised in the transmission axle (166, 166'), in at least two different mounting positions that are adapted to position the connection portion (164) in mutually separated positions along the longitudinal extension (L, L').