Agricultural Tractor Steering Relocation for Cabin Noise and Vibration
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Solution Overview
Problem
Existing agricultural tractor steering systems face challenges in minimizing vibration and noise transmission to the driver, requiring complex design changes and increased costs due to the placement of the steering unit and hydraulic pump, which are not effectively addressed by conventional solutions.
Innovation Solution
The steering unit is positioned within the power supply room, separated from the cabin and transmission, using a mounting bracket to create a space between the steering unit and the power generator, with a transmission unit comprising multiple rotation shafts and universal joints to transmit rotational force, minimizing noise and vibration input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the steering unit is disposed inside the cabin boarding space, then the steering control is convenient for the driver, but the vibration and noise from the hydraulic pump and engine are directly transmitted to the driver through the hydraulic line
Solution Approach 1:
The steering unit is extracted from the cabin boarding space and relocated to the power supply room, separating it from the driver's environment. This extraction removes the source of vibration and noise transmission while maintaining steering functionality through the transmission unit with rotation shafts and universal joints.
Solution Approach 2:
A transmission unit comprising multiple rotation shafts and universal joints is introduced as an intermediary mechanism between the steering unit in the power supply room and the handle in the cabin. This intermediary transmits rotational force while allowing spatial separation and reducing direct vibration transmission to the driver.
2Object-affected harmful factors
If the steering unit is disposed under the cabin as in conventional art, then the vibration and noise transmission is reduced, but the design of transmission location and structure must be changed significantly increasing initial cost
Solution Approach 1:
The power supply room, which already houses the engine and hydraulic pump, is utilized to accommodate the steering unit as well. This multi-functional use of existing space avoids the need for separate structural modifications under the cabin and eliminates costly redesigns of the transmission location and structure.
Solution Approach 2:
The existing power supply room infrastructure serves dual purposes: housing the power generation components and accommodating the steering unit. This self-service approach utilizes available space and structures without requiring additional modifications or increasing initial design costs.
3Object-affected harmful factors
If the steering unit is disposed under the cabin with buffer material, then some vibration and noise reduction is achieved, but the buffer material still transmits vibration and noise to some extent
Solution Approach 1:
Instead of relying on buffer material to attenuate vibration and noise, the steering unit is extracted from the cabin area entirely and placed in the power supply room. This complete spatial separation eliminates the need for buffer materials and achieves more effective vibration and noise isolation.
4Device complexity
If the hydraulic line connects the hydraulic pump and steering unit directly, then the hydraulic system is simple, but the vibration and noise are transmitted through the hydraulic line to the driver
Solution Approach 1:
The transmission unit with rotation shafts and universal joints serves as an intermediary mechanical system that replaces the direct hydraulic line connection for force transmission. While the hydraulic line remains for fluid power delivery, the mechanical transmission path reduces vibration and noise transmission to the driver's cabin area.
Data Source
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AI summary
The present invention is directed to an agricultural tractor. In an agricultural tractor according to the present invention, a steering unit is coupled to a coupling target in a power supply room. According to the present invention, the efficiency of the assembly of a cabin and a transmission is maintained, and also vibration and noise are reduced in a boarding space.