Mower Cutter Disc Lifting Mechanism for Precise Height Adjustment
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Solution Overview
Problem
Existing lawn mowers face challenges in accurately adjusting the mowing height of the cutter disc due to high costs and complexity in motor-driven or manually adjustable structures, which affect stability and accuracy.
Innovation Solution
A lifting mechanism comprising a swing arm and an adjustment assembly with a rotating shaft and cord, allowing for precise control of the cutter disc height through a simple, stable, and cost-effective mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If motor drive is used to control cutter disc height, then control accuracy is improved, but cost and device weight increase
Solution Approach 1:
The patent replaces the motor-driven mechanical system with a purely mechanical lifting mechanism consisting of a swing arm, adjusting assembly, and connecting rod. This substitution eliminates the need for motors while maintaining control accuracy through mechanical linkages, thereby reducing cost and device complexity while preserving the ability to precisely adjust cutter disc height.
Solution Approach 2:
The patent extracts and removes the motor component from the height control system, retaining only the essential mechanical elements needed for lifting and positioning the cutter disc. This extraction eliminates unnecessary complexity and cost associated with motor-driven systems while preserving the core functionality of height adjustment.
2Device complexity
If manual adjustment structure is used, then cost is reduced, but structure complexity and adjustment accuracy worsen
Solution Approach 1:
The patent employs a dynamic mechanical linkage system where the swing arm and connecting rod work together to provide smooth, controlled movement of the cutter disc. This dynamic mechanism allows for precise adjustment through simple manual operation, achieving high adjustment accuracy without increasing structural complexity or cost.
Solution Approach 2:
The patent introduces a connecting rod as an intermediary element between the adjusting assembly and the cutter disc support. This intermediary component translates small adjustments at the operator interface into precise, controlled movements of the cutter disc, thereby achieving high adjustment accuracy through a simple manual structure.
3Ease of operation
If motor drive is used, then lifting control is improved, but overall weight and maintenance costs increase
Solution Approach 1:
The patent replaces the motor-driven lifting control system with a passive mechanical linkage system using the swing arm and connecting rod. This substitution eliminates the need for heavy motors and power transmission components, significantly reducing the overall weight while maintaining ease of operation through simple manual adjustment mechanisms.
Solution Approach 2:
The mechanical linkage system is designed to be self-actuating, where the user's manual input directly translates to cutter disc lifting through the swing arm and connecting rod. This self-service mechanism eliminates the need for external power sources and complex control systems, reducing weight while preserving lifting control functionality.
Data Source
AI summary
A lifting mechanism and a mowing device provided. The lifting mechanism is used for mowing device. The lifting mechanism comprises a swing arm and an adjustment assembly. The swing arm is mounted on the mowing device and can swing relative to the mowing device. The adjustment assembly comprises a fixing frame, a rotating shaft and a cord. The fixing frame is fixedly mounted on the mowing device. The rotating shaft is rotatably mounted on the fixing frame and is movable relative to the fixing frame between a first position and a second position. A first end of the cord is connected to the rotating shaft, and a second end of the cord is connected to the swing arm.