Work Vehicle Fuel Tank Mounting for Capacity and Vibration Decoupling
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Solution Overview
Problem
Existing work vehicles face challenges in increasing fuel tank capacity while preventing the fuel tank from vibrating due to engine vibrations, as the tank is directly connected to the engine and shares vibrations through support structures.
Innovation Solution
The fuel tank is supported by a tank support frame and a pivoting support frame, which are separate from the engine, and fixed using multiple fixing members to prevent vibration transmission, while also serving as partition and heat shielding components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the fuel tank is extended to the front side in the hood to increase capacity, then the fuel tank capacity is increased, but the fuel tank vibrates along with the engine vibration
Solution Approach 1:
A hood support body is introduced as an intermediary component between the engine and the fuel tank. This inverted U-shaped support body straddles the fuel tank and connects to the hood, acting as a mediator that decouples the vibration transmission path. The elastic bodies integrated into the hood support body further serve as vibration isolating intermediaries, absorbing engine vibrations before they reach the fuel tank while maintaining structural support.
Solution Approach 2:
The fuel tank is extracted from direct connection to the engine's vibration system. By positioning the fuel tank on the hood support body rather than directly on the engine or engine-mounted support structures, the harmful vibration pathway is removed. The fixing band and elastic bodies extract the fuel tank from the engine's vibration field, allowing independent vibration characteristics.
2Strength
If the tank support body is connected to the engine via a support member, then the fuel tank is supported, but the engine, support member, tank support body, and fixing band vibrate integrally
Solution Approach 1:
The hood support body combines rigid structural elements with elastic vibration-isolating materials to create a composite support system. The inverted U-shaped hood support body provides rigid structural support, while the integrated elastic bodies provide vibration isolation. This composite structure simultaneously achieves strong support capability and vibration decoupling, preventing integral vibration of the entire support system.
Solution Approach 2:
The elastic bodies change the mechanical parameters of the support system by introducing compliance and damping characteristics. These elastic elements modify the stiffness and natural frequency of the support structure, creating a vibration isolation effect that prevents the rigid connection between engine and fuel tank while maintaining adequate support strength.
Data Source
AI summary
A work vehicle includes an engine provided inwards of a hood; a fuel tank provided extending in a front-back direction from the inside of the hood to the inside of a dashboard of a steering part; a tank support frame that supports the fuel tank; a fixing member that fixes the fuel tank supported by the tank support frame in place; and a rocking support frame that supports the hood such that the hood is capable of rocking vertically. The tank support frame and the rocking support frame are supported by a different member than the member supporting the engine, and include, as a fixing member, a first fixing member fixed extending from the tank support frame to the rocking support frame.