Offset Drive Handle Mechanism for Border-Cutting Lawn Mowers
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Solution Overview
Problem
Existing land maintenance devices, such as lawnmowers, face difficulties in reaching peripheral and border zones due to obstacles like hedges and flower beds, and their drive handles wear out quickly with repeated adjustments, making effective operation challenging.
Innovation Solution
A mobile device with a laterally movable drive handle and a coupling mechanism that allows the handle to adjust in height and lateral direction, facilitating maneuverability around obstacles and enhancing handle durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the mobile device is moved manually to reach peripheral and border zones, then the operator can attempt to access difficult areas, but the operator encounters difficulties in moving the mobile device due to obstacles like hedges and flower beds
Solution Approach 1:
The drive handle is made laterally movable relative to the support frame through a coupling mechanism, allowing the handle to shift position dynamically. This enables the operator to position the handle on one side of the device while the cutting assembly operates on the other side, facilitating access to peripheral and border zones that would otherwise be inaccessible due to obstacles.
2Adaptability or versatility
If the drive handle adjustment systems are used for height adjustment, then the handle height can be modified, but the adjustment systems wear quickly especially if used extensively
Solution Approach 1:
The coupling mechanism enables lateral movement of the drive handle relative to the support frame, providing adaptability without requiring complex adjustment systems. The handle can be repositioned laterally to achieve different operational configurations without subjecting adjustment mechanisms to repeated wear.
3Adaptability or versatility
If the mobile device has standard dimensions in height and width, then the device structure is simple, but the device dimensions interfere with obstacles like peripheral hedges, preventing correct processing of peripheral or border zones
Solution Approach 1:
The mobile device is divided into functionally independent segments: the support frame with cutting assembly and the drive handle with lateral movement capability. This segmentation allows the handle to be repositioned independently of the cutting assembly, enabling operation in confined spaces near obstacles without requiring changes to the overall device dimensions.
Solution Approach 2:
The drive handle is made laterally movable relative to the support frame through a coupling mechanism, allowing the handle to shift position dynamically. This enables the operator to position the handle on one side of the device while the cutting assembly operates on the other side, facilitating access to peripheral and border zones that would otherwise be inaccessible due to obstacles.
Data Source
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AI summary
The invention relates to a mobile device (1) for land maintenance comprising a support frame (2) carrying movement means (3) configured for the movement of the mobile device (1), said movement means (3) defining a support plane (SP) for the mobile device (1); a work tool (4) for performing maintenance operations within the work area; an operating body (5) carrying the work tool (4) and defining an operating zone in which to perform the maintenance operations. The mobile device (1) carries a drive handle (20) emerging at the rear and configured to allow an operator to guide the mobile device (1), said drive handle (20) comprising a joint (40) configured to vary in height, along a vertical axis, a gripping portion of the drive handle. The drive handle (20) comprises a regulating insert having a substantially wedge-like sectional shape and is interposed between a first and a second coupling element of the joint (40).