Front Axle Cooling Layout for High-Maneuverability Tractors
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Solution Overview
Problem
Existing tractors face challenges in maneuverability due to high power requirements, which lead to increased installation space needs, affecting steering and maneuverability, especially with large front wheels and dual tires, and the spatial separation of the cooling system and drive unit complicates tractor design and maneuverability.
Innovation Solution
The tractor design integrates the axle transmission housing between the drive unit and front attachment assembly, positioning the cooling system above the axle transmission housing, allowing for increased steering angles and maneuverability without spatially separating the cooling system and drive unit, and uses a unique wheel suspension system with wishbones and steering rods for precise steering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the drive unit is located directly above the front axle and the cooling system is positioned far enough in front, then space is provided for front wheels to turn, but the tractor's center of gravity and ballasting are adversely affected
Solution Approach 1:
The cooling system is repositioned from a longitudinal arrangement (in front of the drive unit) to a vertical arrangement (above the front axle assembly), utilizing the vertical dimension to resolve the spatial conflict between cooling requirements and steering capability while maintaining favorable center of gravity characteristics
2Power
If high power requirements are met with larger engines, then power increases, but installation space requirements increase and adversely affect steering and maneuverability
Solution Approach 1:
The cooling system is positioned vertically above the front axle assembly rather than horizontally in front, utilizing vertical space to accommodate high power cooling requirements without increasing the horizontal footprint that would interfere with steering and maneuverability
3Power
If large front wheels are used to meet power requirements, then power transmission capability increases, but steering and maneuverability challenges increase
Solution Approach 1:
The cooling system is extracted from the horizontal space in front of the drive unit and repositioned vertically above the front axle assembly, freeing up horizontal space for improved steering arc and maneuverability while maintaining adequate cooling capability for large front wheels
4Ease of operation
If the cooling system is spatially separated from the drive unit, then steering space is improved, but the tractor design becomes more complex and maneuverability is affected
Solution Approach 1:
The cooling system is merged with the front axle assembly by positioning it vertically above the axle transmission housing, creating an integrated structure that provides adequate steering space while simplifying the overall tractor design through component consolidation
Data Source
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AI summary
The present invention relates to a tractor (1) with a chassis (2) which comprises a drive unit (3), a drive transmission (4), a drivable rear axle assembly (5), a front axle assembly (6), and a front attachment assembly (7). The front axle assembly (6) comprises an axle transmission housing (13) and two wheel suspensions (14) mounted on the axle transmission housing (13), on which wheel suspensions front ground engagement means (15) are arranged. The tractor (1) further comprises a cooling system (16) for cooling the drive unit (3). The tractor (1) is characterized in that the axle transmission housing (13) of the front axle assembly (6) is arranged between the drive unit (3) and the front attachment assembly (7), as viewed in the vehicle's longitudinal direction (FL).The cooling system (16) is further arranged above the axle transmission housing (13) and, viewed in the vehicle longitudinal direction (FL), completely between a front, vertically extending plane (23), which is tangent to the envelope curves (24) of the front ground engagement means (15) in the straight-ahead position, and a rear, vertically extending plane (25), which is tangent to the envelope curves (24) of the front ground engagement means (15) in the straight-ahead position.