Tractor Steering Unit Layout for Cabin Vibration Isolation
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Solution Overview
Problem
Existing agricultural tractor steering systems face challenges in minimizing vibration and noise transmission to the driver due to the direct connection of hydraulic components, requiring complex design changes and increased costs, while maintaining assembly efficiency.
Innovation Solution
The steering unit is positioned in the power supply room, separated from the cabin, and connected via a transmission unit with multiple rotation shafts and universal joints, using a mounting bracket to create a separation space, reducing direct noise and vibration input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the steering unit is disposed inside the boarding space of the cabin and connected via hydraulic line to the hydraulic pump on the engine side, then the steering assistance function is achieved, but the vibration and noise of the engine and hydraulic pump are directly transmitted to the driver through the hydraulic line
Solution Approach 1:
The steering unit is extracted from the cabin's 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 from the hydraulic line away from the driver, while the hydraulic pump remains in its original position on the engine side, maintaining the hydraulic connection without requiring the steering unit to be inside the cabin.
Solution Approach 2:
The power supply room serves as an intermediary space between the engine/hydraulic pump and the driver's cabin. By placing the steering unit in this intermediate zone, the system allows hydraulic connection while creating a buffer zone that reduces direct vibration and noise transmission to the driver through the hydraulic line.
2Object-affected harmful factors
If the steering unit is separated from the driver to reduce vibration and noise, then the driving comfort is improved, but it increases manufacturing cost and design complexity
Solution Approach 1:
The power supply room, which already exists in the tractor's structure for housing the engine and hydraulic pump, is given an additional function by serving as the installation location for the steering unit. This multi-functional use of existing space eliminates the need for separate dedicated spaces, reducing design complexity and manufacturing costs while achieving vibration and noise isolation.
Solution Approach 2:
The steering unit installation is merged with the existing power supply room structure rather than requiring a separate cabin modification. This combining approach integrates the noise reduction function into the existing structural framework, avoiding additional manufacturing costs and design complexity that would arise from creating entirely separate isolation structures.
3Object-affected harmful factors
If the steering unit is disposed under the cabin as in conventional art, then noise and vibration are reduced, but the design of transmission location and structure must be changed and power transmission structure between engine and transmission requires modification
Solution Approach 1:
The tractor's internal space is segmented into functional zones: the power supply room (housing engine, hydraulic pump, and steering unit), the transmission area, and the driver's cabin. By placing the steering unit in the power supply room rather than under the cabin, the patent creates a clear spatial segmentation that avoids interfering with the transmission structure while still achieving noise and vibration isolation.
4Adaptability or versatility
If the cabin is separated from or coupled to the transmission, then assembly flexibility is improved, but separate hydraulic line disassembly or connection work needs to be performed in a narrow work space
Solution Approach 1:
The steering unit is extracted from the cabin assembly and relocated to the power supply room, which remains fixed during cabin assembly operations. This extraction means that when the cabin is separated from or coupled to the transmission, the hydraulic line connection between the steering unit and hydraulic pump does not need to be disassembled or reconnected, as the steering unit remains in its fixed position in the power supply room throughout the assembly process.
Data Source
AI summary
The present disclosure is directed to an agricultural tractor. In an agricultural tractor according to the present disclosure, a steering unit is coupled to a coupling target in a power supply room. According to the present disclosure, the efficiency of the assembly of a cabin and a transmission is maintained, and also vibration and noise are reduced in a boarding space.