Work Vehicle Engine Mounting via Segmented Pulley Opening
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Solution Overview
Problem
Conventional work vehicles require a large number of man-hours for assembling and disassembling the engine due to the complex process of inserting and removing the output shaft through a through hole, making maintenance difficult.
Innovation Solution
A work vehicle design featuring a mount surface with an opening to accommodate multiple pulleys on the engine's output shaft, allowing for easy mounting and demounting, with power transmission to both the mower unit and drive wheel via these pulleys.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the output shaft is inserted through a through hole in the prime motor frame to mount the engine, then the engine can be fixed to the frame, but the number of man-hours for assembly and disassembly becomes large with complicated work
Solution Approach 1:
The invention divides the mounting structure into two functional parts: a through hole for shaft insertion and a separate opening for pulley passage. This segmentation allows the output shaft to be secured through the through hole while the pulleys can be independently installed and removed through the opening, simplifying maintenance operations.
Solution Approach 2:
The pulleys serve as an intermediary element that facilitates engine mounting and disassembly. By allowing the pulleys to pass through the opening in the mount surface, the invention creates a mediator mechanism that enables easier engine removal without requiring complete disassembly of the mounting structure.
2Reliability
If the output shaft is fixed through the through hole, then the engine can be securely mounted, but the process of detaching the engine becomes complicated requiring pulley detachment first
Solution Approach 1:
The mounting structure is segmented into a through hole for secure shaft fixation and a separate opening for pulley access. This allows the output shaft to remain securely mounted through the through hole while the pulleys can be independently accessed and removed through the opening, reducing overall system complexity during maintenance.
Solution Approach 2:
The opening in the mount surface is pre-configured to allow pulley passage before engine detachment is needed. This preliminary structural arrangement enables maintenance personnel to quickly remove pulleys through the opening without requiring complex disassembly procedures, thereby simplifying the overall detachment process.
3Strength
If a through hole is formed only large enough for the output shaft, then structural integrity is maintained, but the engine cannot be easily removed without detaching the pulley
Solution Approach 1:
The mount surface is segmented with two distinct features: a through hole sized appropriately for output shaft insertion that maintains structural integrity, and a separate opening that allows pulley passage. This segmentation enables the through hole to preserve strength while the opening facilitates easy engine removal.
Solution Approach 2:
The invention adds a dimensional aspect to the mount surface by creating an opening that provides access to the pulleys from above. This vertical access dimension allows pulleys to be removed without compromising the horizontal structural integrity of the through hole, enabling easy engine removal while maintaining mount surface strength.
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
Facilitates quick attachment and detachment of the engine, simplifying the maintenance process and reducing the time required for assembly and disassembly.
Implementation Method 1
The power of the engine is transmitted to the mower unit via at least one of the plurality of pulleys, and further, is transmitted to the drive wheel via at least one of the plurality of pulleys
Data Source
AI summary
There is provided a work vehicle including: an engine in which a pulley for transmitting power is fitted to an output shaft disposed in such a manner as to project downward from a bottom; and a mount surface at which an opening, into which the pulley can be inserted, is formed, and further, on which the engine is mounted in the state in which the pulley is inserted into the opening from above. The work vehicle is further provided with a fixed plate that is fixed to the bottom of the engine and joined to the mount surface so as to fix the engine onto the mount surface. The output shaft is inserted through the fixed plate, and further, the fixed plate is interposed between the bottom of the engine and the pulley.