Harvester Header Drive Shaft Layout to Avoid Ground Device Contact
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Solution Overview
Problem
The existing drive shaft arrangements in forage harvesters, particularly when the width of the soil infiltration devices is increased, lead to unwanted contact between the drive shaft and the soil infiltration devices due to space constraints, and adjusting the harvesting attachment height exacerbates this issue, lacking backward compatibility and requiring complex solutions like additional gearboxes.
Innovation Solution
A drive assembly with a telescopic rear driveshaft and angled forward front driveshaft connected by a common universal joint, allowing the drive shaft assembly to extend laterally between the intake housing and ground engagement element, reducing installation space and avoiding collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the width of the soil infiltration devices is increased, then the ground engagement capability is improved, but the drive shaft contacts the soil infiltration devices due to space constraints
Solution Approach 1:
The drive shaft assembly is divided into a telescopic rear driveshaft and a front driveshaft connected by a universal joint, allowing independent positioning of each segment to avoid contact with widened soil infiltration devices
Solution Approach 2:
The front driveshaft is angled forward and outward relative to the forage harvester's forward direction, moving the drive shaft assembly into a different spatial dimension that avoids contact with the soil infiltration devices
2Area of stationary object
If the drive shaft is moved closer to the longitudinal center plane, then the space utilization is improved, but backward compatibility with previous harvesting attachments is lost
Solution Approach 1:
The telescopic rear driveshaft can extend and retract, and the front driveshaft is angled, allowing the drive shaft assembly to adapt to different spatial requirements while maintaining compatibility with existing harvesting attachments
3Device complexity
If a one-piece telescopic drive shaft is used, then the structural simplicity is improved, but contact with soil infiltration devices occurs when width is increased
Solution Approach 1:
The drive shaft assembly is segmented into a telescopic rear driveshaft and a front driveshaft connected by a universal joint, enabling the front section to be angled outward to avoid contact with widened soil infiltration devices while maintaining overall structural simplicity
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
This configuration enables widening of the ground engagement point with minimal effort, maintaining safety distances and ensuring compatibility with existing harvesting attachments without additional gearboxes.
Implementation Method 1
The two driveshafts are coupled to each other by a common universal joint
Data Source
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AI summary
A drive arrangement for driving a harvesting header (20) by a forage harvester (10) comprises a drive (50) which is connected by a drive shaft assembly (52) to a first coupling half (54) arranged at the front of an intake housing (24) of the forage harvester (10), which is configured to interact with a second coupling half (56) of the harvesting header (20), wherein at least parts of the drive shaft assembly (52) are located laterally between the intake housing (24) and a ground engagement means (14) of the forage harvester (10).The drive shaft assembly (52) comprises a front drive shaft (78) connected by a common universal joint (90) to the rear telescopic drive shaft (76) coupled at its rear end to the drive (50), which is angled forward and outwards in the horizontal plane relative to a forward direction (V) of the forage harvester (10) and is connected to the first coupling half (54).