Indexed Mower Handle Assembly for Adjustable Height and Storage
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Solution Overview
Problem
Typical walk-behind lawn mowers have a handle that is fixed at a single operative position, which does not accommodate operators of varying heights, leading to discomfort and inefficiency during use.
Innovation Solution
A handle adjustment assembly that includes indexing mechanisms with teeth and gaps, allowing the handle to be adjusted to multiple operative positions and a stored position, enabling operators to customize the handle height and orientation for comfort and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed handle attachment mechanism is used, then the structure is simple and reliable, but the handle cannot be adjusted to accommodate operators of varying heights
Solution Approach 1:
The handle attachment mechanism transitions from a fixed static connection to a dynamic adjustable connection. The indexing mechanism allows the handle to be positioned at multiple discrete angles and heights, providing adaptability while maintaining structural integrity through positive engagement of teeth and lugs at each positioned state.
Solution Approach 2:
The continuous range of handle positions is segmented into discrete indexed positions defined by the teeth and gaps on the indexing members. This segmentation allows for multiple adjustable positions while simplifying the locking mechanism, as the clasp only needs to engage at these predetermined positions rather than providing continuous adjustment.
2Adaptability or versatility
If a semi-permanent locking mechanism is used, then the handle is securely fixed, but it provides only a single operative position and cannot be readjusted
Solution Approach 1:
The locking mechanism is designed to be dynamically reversible, allowing transitions between locked and unlocked states. The clasp assembly can be actuated to release the locking engagement, enabling repositioning of the handle while maintaining secure locking at each positioned state through the indexing teeth and lugs.
Solution Approach 2:
The locking function is segmented into discrete engagement positions corresponding to the indexed teeth positions. Rather than a continuous locking mechanism, the system provides reliable locking at specific predetermined positions, which simplifies the locking mechanism while enabling multiple operative positions.
3Ease of operation
If the handle is fixed at a single position, then the structure is simple, but it does not accommodate operators of varying heights leading to discomfort
Solution Approach 1:
The handle system transitions from a fixed single-position configuration to a dynamically adjustable system with multiple positions. The indexing mechanism enables the handle to be positioned at different heights and angles to accommodate various operator preferences and body dimensions, improving ergonomics and comfort.
Solution Approach 2:
The handle adjustment assembly provides universal adaptability to accommodate operators of varying heights and preferences. The indexing mechanism with multiple positions allows a single mower design to serve a diverse user population, making the equipment universally applicable rather than requiring customization for each operator.
Data Source
AI summary
A handle adjustment assembly is attached to a walk-behind lawn mower, wherein the handle adjustment assembly is rotatably adjustable relative to a deck of the mower to allow the handle to be adjusted to multiple different heights relative to the ground at distinct operative positions. The handle adjustment assembly is also rotatable to allow the handle to be adjusted to a stored position adjacent to the deck, wherein the mower can be stored in a substantially vertical orientation.