Movable Lawn Mower Transmission for Cross-Model Wheel Positioning
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Solution Overview
Problem
Existing lawn mower transmission systems require different specifications for each model, leading to increased manufacturing costs and reduced productivity, as well as a need for separate adjustments for wheel and roller versions.
Innovation Solution
A transmission system with a speed-change device and a power transmission device that is movably coupled, allowing for adjustable positioning of the driving wheel's rotation axis, enabling the use of a common transmission for various models and versions by modifying the power transmission device's specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different transmissions are used for each lawn mower model, then the transmission can be optimized for each model's specifications, but the manufacturing complexity and time increase
Solution Approach 1:
The patent implements a universal transmission system where a single transmission unit can be used across multiple lawn mower models by allowing selective replacement of the transmission gear unit. The CVT unit serves as a common base that can accommodate different transmission gear units designed for various models, eliminating the need to manufacture separate transmissions for each model specification.
2Adaptability or versatility
If different transmissions are installed for each model, then the transmission matches each model's requirements, but the installation time and cost increase
Solution Approach 1:
The transmission system is divided into two separable units: a CVT unit and a transmission gear unit. The transmission gear unit is designed as a detachable module that can be selectively replaced depending on the model requirements. This segmentation allows the common CVT unit to remain installed while only the specific transmission gear unit needs to be changed, significantly reducing installation time compared to replacing entire transmissions.
3Device complexity
If a fixed transmission structure is used, then the manufacturing process is simple, but the cutting height adjustment mechanism requires more space
Solution Approach 1:
The transmission system incorporates a movable transmission gear unit that can be shifted in the vertical direction to adjust the cutting height. This dynamic positioning capability allows the transmission components to occupy variable space, reducing the overall space requirement for the cutting height adjustment mechanism while maintaining structural simplicity.
Data Source
AI summary
A transmission for a lawn mower, for transmitting an output of a drive source to a driving wheel, the transmission including a speed-change transmission device and a power transmission device movably coupled to the speed-change transmission device. The power transmission device includes a first power transmission device coupled to the speed-change transmission device and a second power transmission device to which the driving wheel is coupled, and the first power transmission device and the second power transmission device are movably coupled to each other.