Riding Lawn Mower Layout for Stable Grass Collection
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Solution Overview
Problem
Conventional riding lawn mowers with diesel engines, radiators, and exhaust gas purification devices have a high ground clearance due to the engine configuration, making it difficult to maintain stability when a grass collection container is included, as it raises the center of gravity.
Innovation Solution
The riding lawn mower positions the exhaust gas purification device above the transmission case, lowering its center of gravity and maintaining stability by integrating it with a connector system that allows for adjustable mounting and a bonnet design that covers the engine room, preventing grass from entering and ensuring efficient airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the exhaust gas purification device is arranged behind the radiator and engine, then the cooling air path can effectively blow out hot air, but the ground clearance of the engine room increases, raising the center of gravity and making stable running difficult
Solution Approach 1:
The exhaust gas purification device is relocated from a horizontal arrangement (behind the engine) to a vertical arrangement (above the transmission case). This dimensional change allows the device to be positioned in the vertical space above the engine room rather than extending the horizontal footprint, thereby maintaining effective cooling air path while lowering the center of gravity by utilizing the space above the transmission case which is lower than the traditional rear position.
2Adaptability or versatility
If the grass collection container is provided above the engine room, then grass can be collected, but the center of gravity becomes high, making stable running difficult
Solution Approach 1:
The exhaust gas purification device is positioned above the transmission case to serve as a counterweight element. By placing this relatively heavy component in the lower vertical space above the transmission case rather than in the upper space above the engine, the overall center of gravity of the mower is lowered, counteracting the destabilizing effect of the grass collection container positioned above the engine room.
3Object-affected harmful factors
If the bonnet covers the engine room, then grass entry is prevented, but airflow to the engine and radiator may be restricted
Solution Approach 1:
The bonnet is designed with differentiated local qualities: it provides solid coverage over most of the engine room to prevent grass intrusion, but incorporates specific localized openings or air passage regions that allow sufficient airflow to reach the engine and radiator. This selective permeability maintains both protection and cooling functions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows the riding lawn mower to run stably with a grass collection container by lowering the center of gravity and preventing grass from entering critical components, enhancing operational stability and safety.
Implementation Method 1
a radiator, arranged on the right side of the engine, and a radiator fan, arranged on the left side of the engine
Implementation Method 2
an air cleaner, arranged above the engine
Implementation Method 3
an exhaust gas purification device, disposed above the transmission case
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Provided is a riding lawn mower capable of stably running while including a grass collection container. A riding lawn mower (1) includes a running vehicle body (2) having running wheels (31), (32) and a driver's seat (20); a mower device (3) connected to the running vehicle body (2); and a grass collection container (8) provided behind the driver's seat (20) on the running vehicle body (2) and configured to store grass cut by the mower device (3). An engine room (40) is provided below the grass collection container (8), and an engine (4) and an exhaust gas purification device (5) configured to purify exhaust gas from the engine (4) are arranged in parallel in the engine room (40).